sealant

Abstract

The objective is to provide a sealing material that exhibits good sealing performance at low temperatures. [Solution] The device has a core and a first covering portion located on the surface of the core, A sealing material wherein the glass transition temperature of the material constituting the first coating portion is lower than the glass transition temperature or softening temperature of the material constituting the core portion.

Description

[Technical Field]

[0001] This invention relates to a sealing material. [Background technology]

[0002] Conventionally, some perfluoropolyether groups (PFPE groups) have been known to exhibit excellent low-temperature properties and have been used in coating-type low-temperature seals for automotive and semiconductor applications (Patent Documents 1 and 2). Such PFPE group-containing compounds have been suitable for use in coating and / or sealing applications. Furthermore, attempts have been made to add PFPE group-containing compounds to fluororubber in order to improve low-temperature properties (Patent Document 3). However, sufficient low-temperature properties could not be obtained, and there was a problem in that the perfluoropolyether component added before curing segregated or bled out to the surface. Furthermore, attempts have been made to improve the chemical resistance of rubber by coating other types of rubber with PFPE group-containing compositions (Patent Document 4). This has shown a certain degree of effectiveness in terms of chemical resistance. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] International Publication No. 2019 / 088129 [Patent Document 2] International Publication No. 2019 / 088132 [Patent Document 3] Japanese Patent Publication No. 2005-126542 [Patent Document 4] Japanese Patent Publication No. 2008-214566 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, conventional PFPE group-containing compounds, when used alone, did not possess sufficient mechanical properties for use in fixed seal molded products such as O-rings, and no studies had been conducted on the low-temperature properties of the coated articles.

[0005] Therefore, the present disclosure aims to provide a sealing material that exhibits good sealing performance at low temperatures. [Means for solving the problem]

[0006] This disclosure includes the following aspects: [1] It has a core portion and a first covering portion located on the surface of the core portion, A sealing material wherein the glass transition temperature of the material constituting the first coating portion is lower than the glass transition temperature or softening temperature of the material constituting the core portion. [2] The sealing material according to [1], wherein the glass transition temperature of the material constituting the core is 0°C or lower. [3] The sealing material according to [1] or [2], wherein the glass transition temperature of the first coating portion is -30°C or lower. [4] The sealing material according to any one of [1] to [3], wherein the Shore hardness HS1 of the first coating portion at room temperature is related to the Shore hardness HS2 of the core portion at room temperature by HS1 ≤ HS2 + 20. [5] The sealing material according to any one of [1] to [4], wherein the material constituting the first covering portion is resin. [6] The sealing material is a sealing material according to any one of [1] to [5] having an opening. [7] The sealing material is annular, and is the sealing material described in any one of [1] to [6]. [8] The first covering portion has a convex shape with respect to the sealing direction of the sealing material, according to any one of [1] to [7]. [9] The sealing material according to [7], wherein the core portion is circular or elliptical in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring.

[10] The sealing material according to [7], wherein in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring, the core portion has a straight portion and / or a concave portion at the contact portion with the first covering portion.

[11] The sealing material according to [7], wherein the core portion includes a rectangle in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring.

[12] The sealing material according to [7], wherein in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring, the thickness of at least one end region of the core is greater than the thickness of the region other than the end region.

[13] The core portion is at least one selected from the group consisting of fluororesin, silicone compound, nitrile rubber, and fluororubber, as described in any one of [1] to

[12] .

[14] The sealing material described in any one of [1] to

[13] , wherein the maximum thickness of the core portion is in the range of 0.05 to 10 mm.

[15] The sealing material according to any one of [1] to

[14] , wherein the first coating portion has at least one selected from the group consisting of perfluoropolyether, fluorosilicone, diphenylsiloxane, methylphenylsiloxane, and dimethylsiloxane.

[16] The first coating portion is formed of at least one of the group consisting of a perfluoropolyether group-containing silane compound, a carbon-carbon double bond-containing perfluoropolyether compound and a hydrosilyl compound, and a polysiloxane compound, as described in any one of [1] to

[15] .

[17] The sealing material described in any one of [1] to

[16] , wherein the thickness of the first covering portion is in the range of 0.3 to 3 mm.

[18] A sealing material according to any one of [1] to

[17] , wherein the core portion and the first covering portion are different in color.

[19] Furthermore, the sealing material according to any one of [1] to

[18] , having an adhesive layer that bonded the core portion and the first covering portion.

[20] Furthermore, the core portion has a roughened surface on the contact surface with the first covering portion, according to any one of [1] to

[19] . [twenty one] Furthermore, the sealing material according to any one of [1] to

[20] , having a second covering portion located on the first covering portion. [twenty two] A sealing material described in any one of [1] to

[21] for use in low-temperature sealing. [twenty three] A method for manufacturing a sealing material as described in any one of [1] to

[22] , A coating step of applying a composition containing the material constituting the first coating portion onto the core portion. A method for manufacturing a sealing material, including the method described above. [twenty four] A coating step is performed on the core portion by performing at least one selected from the group consisting of plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment, and then applying a composition containing the material constituting the first coating portion. A method for manufacturing a sealing material as described in

[23] , including the method described in

[23] . [twenty five] A molding process in which a composition containing the material constituting the first covering portion is injected onto the core portion provided in the molding frame and cast into shape. A method for manufacturing a sealing material according to

[23] or

[24] , including the following:

[26] A method for manufacturing a sealing material as described in any one of [1] to

[22] , A first sheet molding process in which the material constituting the core is formed into a sheet to form the first sheet, A second sheet molding process in which the material constituting the first covering portion is formed into a sheet to form a second sheet, and Sheet placement process: The first sheet and the second sheet are placed on top of each other in the molding frame. A method for manufacturing a sealing material, including the method described above.

[27] After the arrangement step, a curing step is performed, in which at least one of the first sheet and the second sheet is cured by heat treatment or light irradiation treatment. A method for manufacturing a sealing material as described in

[26] , including the method described in

[26] .

[28] After the hardening process, a processing step to shape the material into the desired form. A method for manufacturing a sealing material according to

[27] , including the method described in

[27] . [Effects of the Invention]

[0007] This disclosure provides a sealing material that exhibits good sealing performance at low temperatures. [Brief explanation of the drawing]

[0008] [Figure 1] This is a plan view of the sealing material according to the first embodiment. [Figure 2] This is a cross-sectional view of the sealing material along line II-II in Figure 1. [Figure 3] This is a plan view of the sealant in modified example 1. [Figure 4] Figure 3 is a cross-sectional view of the sealing material along line IV-IV. [Figure 5] This is a cross-sectional view of a portion of the sealing material in modified example 2. [Figure 6] This is a cross-sectional view of a portion of the sealing material in modified example 3. [Figure 7] This is a cross-sectional view of a portion of the sealing material in modified example 4. [Figure 8] This is a cross-sectional view of a portion of the sealing material in modified example 5. [Figure 9] This is a cross-sectional view of a portion of the sealing material in modified example 6. [Figure 10] This is a cross-sectional view of a portion of the sealing material in modified example 7. [Figure 11] This is a cross-sectional view of a portion of the sealing material in modified example 8. [Figure 12] This is a cross-sectional view of a portion of the sealing material in modified example 9. [Figure 13] This is a cross-sectional view of a portion of the sealing material in modified example 10. [Figure 14] This is a cross-sectional view of a portion of the sealing material in modified example 11. [Figure 15] This is a cross-sectional view of a portion of the sealing material in modified example 12. [Figure 16] This is a cross-sectional view of a portion of the sealing material in modified example 13. [Figure 17] This is a cross-sectional view of a portion of the sealing material in modified example 14. [Figure 18] This is a cross-sectional view of a portion of the sealing material in modified example 15. [Figure 19] This is a cross-sectional view of a portion of the sealing material in modified example 16. [Figure 20] This is a plan view of the sealing material according to the second embodiment. [Figure 21] This is a cross-sectional view of line XXI-XXI in Figure 20. [Figure 22] This is a plan view of the sealing material according to the third embodiment. [Figure 23] Figure 22 is a cross-sectional view of the sealing material along line XXIII-XXIII. [Modes for carrying out the invention]

[0009] Hereinafter, a sealing material, which is one aspect of this disclosure, will be described in detail with reference to the illustrated embodiment. Note that some of the drawings are schematic and may not reflect actual dimensions or proportions.

[0010] <First Embodiment> Figure 1 is a plan view showing a sealing material according to the first embodiment of this disclosure. Figure 2 is a cross-sectional view taken along line II-II of Figure 1. In Figure 2, the right side of the paper is the inside of the sealing material 1, and the left side of the paper is the outside of the sealing material 1.

[0011] As shown in Figures 1 and 2, the sealing material 1 is It has a core portion 2 and a first covering portion 3 located on the surface of the core portion 2, The glass transition temperature (hereinafter sometimes referred to as "Tg") of the material constituting the first coating portion 3 is lower than the Tg or softening temperature of the material constituting the core portion 2.

[0012] Here, Tg is a value that can be obtained by dynamic viscoelasticity measurement (DMA), and corresponds to the starting temperature when the DMA storage modulus curve transitions from the glass region to the glass transition region (rubber transition region).

[0013] By providing a first coating portion 3 on the core portion 2, which has a Tg lower than the Tg or softening temperature of the material constituting the core portion 2, a sealing material 1 with excellent sealing performance at low temperatures can be provided.

[0014] In this specification, the direction from right to left on the plane of a plan view is defined as the X direction (forward X direction). The direction from bottom to top on the plane of the paper is defined as the Y direction (forward Y direction). The direction perpendicular to the X and Y directions is defined as the Z direction. When X, Y, and Z are arranged in that order, they form a left-handed system. The forward Z direction may be described as the upper side, and the reverse Z direction as the lower side.

[0015] In this specification, the upper surface of the sealant refers to the area of ​​the sealant visible from the forward Z direction, and the lower surface of the sealant refers to the area of ​​the sealant visible from the reverse Z direction. The inner and outer surfaces of the sealant refer to the areas of the sealant that include the inner and outer circumferences in a plan view (viewed from the Z direction) and are visible from a direction perpendicular to the Z axis. In this specification, "cross section" refers to a cross section perpendicular to the annular plane of the sealant and perpendicular to the circumferential direction of the ring. That is, if the sealant is annular, "cross section" refers to a cross section formed by a plane that includes the axis (i.e., the center of the ring) and is parallel to the Z axis.

[0016] The sealing material 1 can be used in a variety of applications. For example, it can be used in semiconductor manufacturing equipment, automobiles, refrigerators, oil drilling equipment, semiconductor manufacturing-related equipment, etc.

[0017] The sealing material 1 has an opening 4 that penetrates the sealing material 1 in the thickness direction (Z direction).

[0018] The sealing material 1 is annular. The sealing material 1 has an inner circumferential surface located on the side of the opening 4 and an outer circumferential surface facing the inner circumferential surface. The axis of the inner circumferential surface and the axis of the outer circumferential surface may be at the same location. An annular shape is defined as a shape that encloses the inner region (i.e., the opening) without interruption, and the shapes of the inner and outer circumferential surfaces do not have to be circular; they may be rectangular, polygonal, or any other shape. In the sealing material, the center side is considered the inside, and the direction facing the center side is considered the outside.

[0019] The maximum length L of the sealant 1 in the X direction may be, for example, in the range of 0.1 to 10 mm, and more specifically, in the range of 1 to 5 mm. The maximum length of the sealant 1 in the Y direction may be, for example, in the range of 2 to 1000 mm, and more specifically, in the range of 10 to 500 mm. The maximum thickness T of the sealant 1 in the Z direction may be, for example, in the range of 1 to 50 mm, and more specifically, in the range of 2 to 10 mm.

[0020] As shown in Figure 2, in the cross-sectional view of the sealant 1, the maximum length L in the X direction at each cross-section of the sealant 1 is equal to the maximum thickness T in the Z direction, but they may be different.

[0021] In one embodiment, in the cross-sectional view of the sealing material 1, the maximum length L in the X direction of the sealing material 1 is greater than the maximum thickness T in the Z direction. By adopting this configuration, it is expected that twisting of the sealing material will be less likely to occur during compression.

[0022] In one embodiment, in the cross-sectional view of the seal material 1, the maximum length L in the X direction of the seal material 1 is smaller than the maximum thickness T in the Z direction. By adopting this configuration, the jig area for mounting the seal material can be reduced, making it possible to mount it on narrower parts.

[0023] (core) The sealing material 1 of this disclosure has a core portion 2. By using the core portion 2, the sealing material 1 can be reinforced and its mechanical properties can be improved. Furthermore, depending on the material of the core portion 2, the sealing performance of the sealing material 1 can be improved, the amount of the first coating portion used can be reduced, and chemical wear and / or physical wear can be improved.

[0024] As shown in Figure 1, the core portion 2 is annular when viewed from the Z direction. The core portion 2 has an inner circumferential surface and an outer circumferential surface that face each other. On the inner circumferential surface, the core portion 2 and the first covering portion 3 are smoothly continuous, that is, there is no step at their boundary. On the outer circumferential surface, the core portion 2 and the first covering portion 3 are smoothly continuous, that is, there is no step at their boundary.

[0025] As shown in Figure 2, the core portion 2 has a pair of faces opposite each other in the Z direction and a pair of faces opposite each other in the X direction that connect the ends of these faces. The pair of faces opposite each other in the X direction constitute a part of the inner and outer circumferential surfaces of the sealing material 1, respectively. The pair of faces opposite each other in the Z direction are perpendicular to the pair of faces opposite each other that connect the ends of these faces. In other words, the core portion 2 has a rectangular cross-section. Note that each face of the core portion 2 does not have to be perfectly flat in cross-section, and may have some curved surfaces, uneven surfaces, etc. Also, the core portion 2 may have a shape other than a rectangle.

[0026] In this specification, the upper surface of the core refers to the region of the core visible from the forward Z direction when only the core is viewed, and the lower surface of the core refers to the region of the core visible from the reverse Z direction when only the core is viewed. Unless otherwise specified, the inner circumferential surface of the core is the surface in contact with the opening, and the outer circumferential surface of the core is the surface located outside the core that corresponds to the inner circumferential surface.

[0027] The maximum length L in the cross-section of the core portion 2 (the maximum length L in the cross-section of the sealing material 1, i.e., the maximum length of the core portion 2 in the X direction) may be in the range of 0.5 to 10 mm, for example, and more specifically, in the range of 1 to 5 mm. The maximum thickness T2 of the core portion 2 may be in the range of 0.05 to 3 mm, for example, and more specifically, in the range of 0.3 to 2 mm.

[0028] The Shore hardness HS2 of the core 2 at room temperature is, for example, A40 or higher, specifically A50 or higher. The upper limit of the Shore hardness HS2 of the core 2 at room temperature is not particularly limited, but for example, D90 or lower. The Shore hardness HS2 of the core 2 at room temperature may be, for example, A40 to A50, or A50 to A80. The Shore hardness can be measured using a durometer, for example, a durometer Type A or Type D manufactured by Polymer Instruments Co., Ltd. can be used. Here, room temperature is not particularly limited, but for example, it means a temperature in the range of 20 to 30°C. The Shore hardness is a value measured in accordance with JIS K6253-2012. In this specification, a Shore hardness of D40 is considered to be equal to A90.

[0029] The core portion 2 may have a roughened surface. The first coating portion 3 may be provided on this roughened surface. The roughened surface may be provided on the entire contact surface between the core portion 2 and the first coating portion 3, or only on a part of it. Alternatively, the first coating portion 3 may be provided on a part of the roughened surface portion of the core portion 2. By having a roughened surface, the adhesive strength between the core portion 2 and the first coating portion 3 can be strengthened. In addition, the time it takes for external liquids, etc., to penetrate to the inner surface of the core portion 2 can be extended.

[0030] The roughened surface portion mentioned above refers to the portion with a surface roughness (Ra) of 0.1 μm or more.

[0031] The above-mentioned roughened portion can be formed, for example, by roughening the surface of the core portion 2, specifically by performing at least one of plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment.

[0032] The core 2 is formed from a compound or composition capable of forming a hardened product. The core 2 is not particularly limited, but may consist of, for example, a metal, a ceramic, and / or an organic material.

[0033] When the core 2 is made of metal, the softening temperature of the material constituting the core 2 is, for example, 1500°C or lower. The lower limit of the Tg of the material constituting the core 2 is not particularly limited, but is, for example, -130°C or higher.

[0034] Examples of the above-mentioned metals include aluminum, iron, stainless steel, and Hastelloy (trademark).

[0035] When the core 2 is made of ceramic, the softening temperature of the material constituting the core 2 is, for example, 3,000°C or less. The lower limit of the Tg of the material constituting the core 2 is not particularly limited, but is, for example, -80°C or higher.

[0036] Examples of the above-mentioned ceramics include alumina, zirconia, and silicon carbide.

[0037] When the core portion 2 is made of an organic material, the Tg of the material constituting the core portion 2 is, for example, 0°C or lower. The lower limit of the Tg of the material constituting the core portion 2 is not particularly limited, but is, for example, -80°C or higher. Since the Tg of the material constituting the first coating portion 3 is lower than that of the core, the temperature resistance of the sealant 1 is improved. As a result, the sealant 1 can be used at low temperatures.

[0038] The above organic material may be, for example, at least one selected from the group consisting of fluororesin silicone compounds, nitrile rubber (NBR), and fluororubber.

[0039] Examples of fluororesins include polytetrafluoroethylene (PTFE), modified polytetrafluoroethylene (modified PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), ethylene-tetrafluoroethylene copolymer (ETFE), polychlorotrifluoroethylene (PCTFE), and polyvinylidene fluoride (PVDF). For example, PTFE may be used, and the Shore hardness HS2 of PTFE at room temperature may be in the range of D30 to D90 or in the range of D40 to D80.

[0040] The silicone compound may be, for example, a compound obtained by curing a rubber having an organosiloxane structure including a dimethylsiloxane structure by a hydrosilyl reaction, a peroxide reaction such as acrylic, or a condensation reaction with a silane coupling agent, and then molding it. Examples include VMQ70 and VMQ50. The Shore hardness HS2 of the silicone compound at room temperature may be in the range of A0 to A90, or in the range of A60 to A80.

[0041] Nitrile rubber may contain, for example, a copolymer of butadiene and acrylonitrile, isoprene, or other third components. Examples of nitrile rubbers include NBR70, NBR60, NBR50, and NBR40. The Shore hardness HS2 of nitrile rubber at room temperature may be in the range of A30 to A90, or in the range of A50 to A90.

[0042] Fluororubber refers to rubber in which at least some of the hydrogen atoms are fluorinated. Examples of perfluororubber include tetrafluoroethylene-perfluorovinyl ether compounds (FFKM) and tetrafluoroethylene-propylene compounds (FEPM). Examples of fluororubber other than perfluororubber include tetrafluoroethylene-vinylidene fluoride compounds. These rubbers may each contain comonomer components. Examples of fluororubber include DuPont's Kalrez and Viton; Daikin Industries, Ltd.'s Dupla and Daiel; Solvay's Technoflon; and AGC's Aflas series. The Shore hardness HS2 of the fluororubber at room temperature may be in the range of A40 to A90, or in the range of A50 to A80.

[0043] In one embodiment, the core 2 is made of FFKM or FEPM. In this embodiment, the chemical resistance of the core 2 is improved.

[0044] In one embodiment, the core portion 2 is made of a silicone compound. In this embodiment, the processability and flexibility of the core portion 2 are improved.

[0045] In one embodiment, the core portion 2 is made of NBR. In this embodiment, gas permeability can be suppressed in the core portion 2 (low gas permeability). Furthermore, the processability of the core portion 2 is improved.

[0046] In one embodiment, the core portion 2 is made of metal or ceramic. In this embodiment, the rigidity of the core portion 2 is increased (it becomes larger), and dimensional changes due to temperature fluctuations are less likely to occur (it has good dimensional stability).

[0047] (First covering section) The sealing material 1 of this disclosure has a first covering portion 3 on the surface of the core portion 2. In this embodiment, as shown in Figures 1 and 2, the first covering portion 3 is located on the upper and lower surfaces of the core portion 2. That is, there are two first covering portions 3, as shown in Figure 2. As shown in Figure 1, the first covering portion 3 is annular when viewed from the Z direction. The presence of the first covering portion 3 provides sealing performance at low temperatures.

[0048] As shown in Figure 2, the two first covering portions 3 have a convex shape with respect to the sealing direction of the sealing material 1. The sealing direction is the direction in which the sealing portion of the member to be sealed exists, that is, the direction in which the sealing material is pressed against the member to be sealed. In cross-section, one of the first covering portions 3 has a convex surface in the forward Z direction, and the other first covering portion 3 has a convex surface in the reverse Z direction. The two first covering portions 3 bulge in an arc shape in the forward Z direction and the reverse Z direction, respectively, and in cross-section, the center is the thickest, the thickness gradually decreases towards both ends, and the ends are the thinnest. The first covering portions 3 do not exist on the inner and outer circumferential surfaces of the core portion 2. Note that the first covering portions 3 may have other shapes.

[0049] The Shore hardness HS1 of the first coating portion 3 at room temperature is, for example, A30 or higher, specifically A40 or higher. The upper limit of the Shore hardness of the first coating portion 3 is not particularly limited, but for example, D40 or lower. The Shore hardness HS1 of the first coating portion 3 at room temperature may be in the range of A40 to A90, or in the range of A50 to A80. The Shore hardness can be measured in the same way as the core portion 2. A lower Shore hardness means it is softer and can be compressed and crimped with less force.

[0050] Preferably, the Shore hardness HS1 of the first coating portion 3 at room temperature is in a relationship of HS1 ≤ HS2 + 20 with respect to the Shore hardness HS2 of the core portion 2 at room temperature. This allows the coating portion to be sufficiently compressed during seal crimping, generating a reaction force and resulting in good low-temperature sealing performance even with less compression. When comparing HS1 and HS2, it is preferable to compare HS1 and HS2 obtained using the same hardness tester (for example, measuring HS1 and HS2 with type A, or measuring with type D). When comparing HS1 and HS2 obtained using different hardness testers (for example, measuring HS1 with type A and HS2 with type D), in this specification, Shore hardness D40 is considered to correspond to A90 when comparing HS1 and HS2. For example, if HS2 is D55 and HS1 is A80, HS2 is converted to A105, and the hardness difference between HS1 and HS2 is 25.

[0051] The maximum length L of the first covering portion 3 (maximum value in the X direction) is, for example, in the range of 0.5 to 10 mm, specifically in the range of 1 to 5 mm.

[0052] The maximum value of the thickness T1 of the first covering portion 3 (maximum value in the Z direction) is preferably in the range of 0.3 to 10 mm, more preferably in the range of 0.7 to 5 mm, even more preferably in the range of 1.0 to 3 mm, and particularly preferably in the range of 1.1 to 2 mm. By having the thickness T1 within the above range, the sealing performance of the first covering portion 3 at low temperatures is improved, and problems such as twisting are less likely to occur.

[0053] The ratio of the thickness T1 of the first covering portion 3 to the thickness T2 of the core portion 2 may be in the range of 1 to 10,000%.

[0054] Furthermore, if the thickness T2 of the core portion 2 is large, the thickness T1 of the first covering portion 3 may be small. For example, if the thickness T2 of the core portion 2 is in the range of 1 to 10 mm, the thickness T1 of the first covering portion 3 may be in the range of 0.1 to 5 mm or in the range of 1 to 3 mm. For example, the ratio of the thickness T1 of the first covering portion 3 to the thickness T2 of the core portion 2 may be in the range of 1 to 50%.

[0055] In cross-section, the ratio of the thickness T1 of the first covering portion 3 to the thickness T of the sealing material 1 is not particularly limited, but for example, it may be in the range of 1 to 49%, and more specifically, it may be in the range of 10 to 45%.

[0056] In cross-section, the ratio of the thickness T2 of the core portion 2 to the thickness T of the sealing material 1 is not particularly limited, but for example, it may be in the range of 1 to 98%, and more specifically, it may be in the range of 10 to 80%.

[0057] The Tg of the material constituting the first coating portion 3 is lower than the Tg or softening temperature of the material constituting the core portion 2. By providing such a first coating portion 3, it becomes possible to use the device at lower temperatures.

[0058] The first covering portion 3 and the core portion 2 may be different in color. For example, the core portion may be white and the first covering portion may be black. With the above configuration, the degree of covering of the core portion can be confirmed.

[0059] The color difference ΔE between the first covering portion 3 and the core portion 2 is preferably 1 or more, more preferably 3 or more, even more preferably 5 or more, and particularly preferably 10 or more. A larger color difference makes it easier to visually distinguish between the first covering portion 3 and the core portion 2, facilitating the confirmation of the correct surface when installing the sealing material 1 and facilitating the detection of installation defects.

[0060] The Tg of the first coating portion 3 is preferably -30°C or lower, more preferably -50°C or lower, even more preferably -80°C or lower, and particularly preferably -100°C or lower. This configuration allows the sealing material 1 to be used at lower temperatures, improving the maintenance of sealing performance. The lower limit of the Tg of the first coating portion 3 is not particularly limited, but for example, it is -130°C or higher.

[0061] The first coating portion 3 may contain a resin, and for example, it may be made of a resin.

[0062] The first coating portion 3 may have at least one selected from the group consisting of perfluoropolyether, fluorosilicone, diphenylsiloxane, methylphenylsiloxane, dimethylsiloxane, and polysiloxane.

[0063] The first coating portion 3 may be formed from at least one of the group consisting of a perfluoropolyether group (PFPE group)-containing silane compound, a carbon-carbon double bond-containing PFPE compound and a hydrosilyl compound, and a polysiloxane compound.

[0064] (PFPE group-containing silane compound) PFPE group-containing silane compounds have, for example, a structure represented by the following formula. [ka]

[0065] R F1 The group is -Rf 2 p -R F -O q - is.

[0066] p is 0 or 1. In one embodiment, p is 0. In another embodiment, p is 1.

[0067] q is, independently of each other, 0 or 1. In one embodiment, q is 0. In another embodiment, q is 1.

[0068] Rf 2 is an optionally substituted C 1-6 alkylene group by one or more fluorine atoms. The "C 1-6 alkylene group" may be linear or branched, preferably a linear or branched C 1-3 alkylene group, more preferably a linear C 1-3 alkylene group.

[0069] The above Rf 2 is preferably a C 1-6 alkylene group substituted by one or more fluorine atoms, more preferably a C 1-6 perfluoroalkylene group, still more preferably a C 1-3 perfluoroalkylene group.

[0070] The above C 1-6 perfluoroalkylene group may be linear or branched, preferably a linear or branched C 1-3 perfluoroalkylene group, more preferably a linear C 1-3 perfluoroalkylene group, specifically -CF2-, -CF2CF2-, or -CF2CF2CF2-.

[0071] R FEach instance is independently a divalent fluoropolyether group (PFPE group). A divalent fluorine-containing group means a divalent organic group in which at least some of the hydrogen atoms are substituted with fluorine atoms.

[0072] In this specification, the term "organic group" means a group containing carbon atoms. For example, a divalent organic group means a divalent group containing carbon. Divalent organic groups are not particularly limited, but include groups obtained by removing 1 to 9 hydrogen atoms from a hydrocarbon group. Divalent organic groups are not particularly limited, but include groups obtained by removing 1 hydrogen atom from a hydrocarbon group.

[0073] Preferably, R F Each of these is independently represented by the base R shown in the following formula (f1). F11 , the base R represented by the following formula (f2) F12 R, which is expressed by the following formula (f3) F13 , or R represented by the following formula (f4) F14 That is the case. -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - (f1) -(C s R c1 2s ) s1 -(R d ) s2 - (f2) -[Rf 4 -C(=O)-QC(=O)] a3 - (f3) -Rf 4 -(CX 121 X 122 ) x1 -(X a1 ) y1 -(CX 123 X 124 ) z1 - (f4)

[0074] ·R F11 -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - (f1)

[0075] -OC j R c 2j Each of these is an independent repeating unit having a linear or branched chain. -OC h R c 2h-2 Each of these is an independent repeating unit having a ring structure.

[0076] R c Each of these is independently a hydrogen atom, a fluorine atom, or a chlorine atom, except R F11 In this case, at least one R c This is a fluorine atom.

[0077] R c Preferably, this is a fluorine atom.

[0078] Each of the values ​​of j is an independent integer between 1 and 6.

[0079] Each of h is an independent integer between 1 and 7.

[0080] j1 is a non-negative integer. h1 is a non-negative integer. However, the sum of j1 and h1 is 1 or greater, preferably 2 or greater. The order of existence of each repeating unit enclosed in parentheses with j1 or h1 is arbitrary in the formula.

[0081] In one aspect, -(OC j R c 2j ) j1 -teeth, -(OC6F12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3R Fa 6) d1 -(OC2F4) e1 -(OCF2) f1 - It is represented as follows. a1, b1, c1, d1, e1, and f1 are each independent integers between 0 and 200, the sum of a1, b1, c1, d1, e1, and f1 is 1 or greater, and the order of existence of each repeating unit enclosed in parentheses with a1, b1, c1, d1, e1, or f1 is arbitrary in the expression. The above R F11 By having this property, a surface treatment layer can be formed that has water repellency, oil repellency, chemical resistance, and friction durability. In this specification, R F11 The left side is -Rf 2 p - The right side is -O q -Bonds to each other. Furthermore, the above formula preferably has at least one fluorine atom.

[0082] R Fa These are, independently, a hydrogen atom, a chlorine atom, or a fluorine atom.

[0083] The above R Fa Preferably, it is a hydrogen atom or a fluorine atom, and more preferably a fluorine atom.

[0084] a1, b1, c1, d1, e1, and f1 may preferably be independent integers between 0 and 100.

[0085] The sum of a1, b1, c1, d1, e1, and f1 is preferably 5 or more, more preferably 10 or more, and may be, for example, 15 or more or 20 or more. The sum of a1, b1, c1, d1, e1, and f1 is preferably 200 or less, more preferably 100 or less, and even more preferably 60 or less, and may be, for example, 50 or less or 30 or less.

[0086] Examples of the repeating unit having the above linear or branched chain include structures such as the following. -(OC6F 12 )- may be, for example, -(OCF2CF2CF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2CF2CF2)-, -(OCF2CF(CF3)CF2CF2CF2)-, -(OCF2CF2CF(CF3)CF2CF2)-, -(OCF2CF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF2CF(CF3))-, etc. -(OC5F 10 )- may be, for example, -(OCF2CF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2CF2)-, -(OCF2CF(CF3)CF2CF2)-, -(OCF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF(CF3))-, etc. -(OC4F8)- may be any of -(OCF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2)-, -(OCF2CF(CF3)CF2)-, -(OCF2CF2CF(CF3))-, -(OC(CF3)2CF2)-, -(OCF2C(CF3)2)-, -(OCF(CF3)CF(CF3))-, -(OCF(C2F5)CF2)- and -(OCF2CF(C2F5))-. -(OC3F6)-(that is, in the above formula, R Fa is a fluorine atom) may be any of -(OCF2CF2CF2)-, -(OCF(CF3)CF2)- and -(OCF2CF(CF3))-. -(OC2F4)- may be any of -(OCF2CF2)- and -(OCF(CF3))-.

[0087] Preferably, the repeating unit is linear. By having this configuration, Tg becomes lower. The repeating unit may include a branched chain, for example, within a range that does not affect low-temperature properties.

[0088] In one aspect, R F11 is -(OC6F 12 ) a1 -(OC5F 10 ) b1-(OC4F8) c1 -(OC3R Fa 6) d1 -(OC2F4) e1 -(OCF2) f1 - is represented by. Each symbol is as described above.

[0089] -(OC h R c 2h-2 )- can be the following three-membered ring, four-membered ring, five-membered ring, or six-membered ring. [Chemical formula] [In the formula, * indicates the bonding position.]

[0090] In one embodiment, R F11 is, in each occurrence, independently a group represented by any of the following formulas (f11) to (f16). -(OC3F6) d1 -(OC2F4) e1 - (f11) [In the formula, d1 is an integer from 1 to 200; e1 is 0 or 1, preferably 1.]; -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - (f12) [In the formula, c1 and d1 are each independently an integer from 0 to 30, e1 and f1 are each independently an integer from 1 to 200; the sum of c1, d1, e1 and f1 is 2 or more; ​​​​​​​​​​​​​​​​​10 and OC6F 12 It is a group selected from these groups, or a combination of two or three groups selected independently from these groups; g1 is an integer between 2 and 100. -(R 71 -R 72 ) g1 -R r -(R 72’ -R 71’ ) g1’ - (f14) [In the formula, R 71 This is either OCF2 or OC2F4; R 72 OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 It is a group selected from these groups, or a combination of two or three groups selected independently from these groups; R 71’ This is either OCF2 or OC2F4; R 72’ OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 It is a group selected from these groups, or a combination of two or three groups selected independently from these groups; g1 is an integer between 2 and 100; g1' is an integer between 2 and 100; R r teeth, [ka] (In the formula, * indicates the bonding position.) It is one of the following: -(OC6F 12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - (f15) [In the formula, e1 is an integer between 1 and 200, a1, b1, c1, d1, and f1 are each independent integers between 0 and 200, the sum of a1, b1, c1, d1, e1, and f1 is at least 1, and the order of existence of each repeating unit enclosed in parentheses with a1, b1, c1, d1, e1, or f1 is arbitrary in the formula.] -(OC6F 12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - (f16) [In the formula, f1 is an integer between 1 and 200, a1, b1, c1, d1, and e1 are each independent integers between 0 and 200, the sum of a1, b1, c1, d1, e1, and f1 is at least 1, and the order of existence of the repeating units enclosed in parentheses with a1, b1, c1, d1, e1, or f1 is arbitrary in the formula.]

[0091] In the above formula (f11), d1 is preferably an integer between 5 and 200, more preferably between 10 and 100, and even more preferably between 15 and 50, for example between 25 and 35. In the above formula (f11), (OC3F6) is preferably a group represented by (OCF2CF2CF2), and more preferably a group represented by (OCF2CF2CF2). In the above formula (f11), (OC2F4) is preferably a group represented by (OCF2CF2).

[0092] In the above formula (f12), e1 and f1 are each an integer, preferably between 5 and 200, more preferably between 10 and 200. The sum of c1, d1, e1, and f1 is preferably 5 or more, more preferably 10 or more, and may be, for example, 15 or more or 20 or more. In one embodiment, the above formula (f12) is preferably -(OCF2CF2CF2CF2) c1 -(OCF2CF2CF2) d1 -(OCF2CF2) e1-(OCF2) f1 - is the base represented by -. In another embodiment, formula (f12) is -(OC2F4) e1 -(OCF2) f1 It may also be represented as a base by -.

[0093] In the above equation (f13), R 71 Preferably, it is OC2F4. In (f13) above, R 72 Preferably, the group is selected from OC2F4, OC3F6, and OC4F8, or a combination of two or three groups independently selected from these groups, and more preferably, a group selected from OC3F6 and OC4F8. The combination of two or three groups independently selected from OC2F4, OC3F6, and OC4F8 is not particularly limited, but examples include -OC2F4OC3F6-, -OC2F4OC4F8-, -OC3F6OC2F4-, -OC3F6OC3F6-, -OC3F6OC4F8-, -OC4F8OC4F8-, -OC4F8OC3F6-, -OC4F8OC2F4-, and -OC Examples include 2F4OC2F4OC3F6-, -OC2F4OC2F4OC4F8-, -OC2F4OC3F6OC2F4-, -OC2F4OC3F6OC3F6-, -OC2F4OC4F8OC2F4-, -OC3F6OC2F4OC2F4-, -OC3F6OC2F4OC3F6-, -OC3F6OC3F6OC2F4-, and -OC4F8OC2F4OC2F4-. In the above formula (f13), g1 is preferably an integer of 3 or more, more preferably 5 or more. The above g1 is preferably an integer of 50 or less. In the above formula (f13), OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 The chain may be either linear or branched, and is preferably linear. In this embodiment, the above formula (f13) is preferably -(OC2F4-OC3F6) g1 -or-(OC2F4-OC4F8) g1 - is

[0094] In the above equation (f14), R 71 , R 72And g1 has the same meaning as the description in formula (f13) above and has the same characteristics. 71’ , R 72’ and g1' are the R values ​​described in formula (f13) above, respectively. 71 , R 72 And is synonymous with g1 and has a similar appearance. r Preferably, [ka] [In the formula, * indicates a bonding position.] It is one of the following, more [ka] [In the formula, * indicates a bonding position.] That is the case.

[0095] In the above formula (f15), e1 is preferably an integer between 1 and 100, more preferably between 5 and 100. The sum of a1, b1, c1, d1, e1, and f1 is preferably 5 or more, more preferably 10 or more, for example between 10 and 100.

[0096] In the above equation (f15), R F11 The repeating unit at the end of the expression may be -(OCF2CF2OCF2CF2CF2)-.

[0097] In the above formula (f16), f1 is preferably an integer between 1 and 100, more preferably between 5 and 100. The sum of a1, b1, c1, d1, e1 and f1 is preferably 5 or more, more preferably 10 or more, for example between 10 and 100.

[0098] In one embodiment, the above R F11 This is the group represented by the above formula (f11).

[0099] In one embodiment, the above R F11 This is the group represented by the above formula (f12).

[0100] In one embodiment, the above R F11 This is a group represented by the above formula (f13) or (f14).

[0101] In one embodiment, the above R F11 This is the group represented by the above formula (f13).

[0102] In one embodiment, the above R F11 This is the group represented by the above formula (f14).

[0103] In one embodiment, the above R F11 This is the group represented by the above formula (f15).

[0104] In one embodiment, the above R F11 This is the group represented by the above formula (f16).

[0105] In one embodiment, the above R F11 This is a group represented by the above formulas (f11), (f12), (f15), or (f16).

[0106] In one embodiment, the above R F11 This is a group represented by the above formulas (f11), (f12), or (f16).

[0107] The above R F11 In this case, the ratio of e1 to f1 (hereinafter referred to as the "e / f ratio") is, for example, 0.1 or more and 10 or less, preferably 0.2 or more and 5 or less, more preferably 0.2 to 2, even more preferably 0.2 or more and 1.5 or less, even more preferably 0.2 or more and less than 0.9, and particularly preferably 0.2 or more and 0.85 or less. The stability of the resulting fluorine-containing compound is improved by having the e / f ratio within the above range. Here, f1 is an integer of 1 or more.

[0108] In one embodiment, R F11 In this case, the e / f ratio is preferably 1.0 or higher, for example, 1.1 or higher, or 1.3 or higher. F11In this case, the e / f ratio is preferably 10.0 or less, 9.0 or less, more preferably 5.0 or less, even more preferably 2.0 or less, and particularly preferably 1.5 or less. F11 In this context, the e / f ratio can be, for example, 1.0 to 10.0, more specifically 1.0 to 5.0, more specifically 1.0 to 2.0, and even more specifically 1.0 to 1.5.

[0109] In one embodiment, R F11 In this case, the e / f ratio may be in the range of 1.0 to 1.2.

[0110] In one embodiment, R F11 In this case, the e / f ratio is less than 1.0, and may be, for example, less than 0.9, 0.8 or less, or 0.7 or less. F11 In this case, the e / f ratio is preferably 0.2 or higher, more preferably 0.3 or higher, even more preferably 0.4 or higher, and particularly preferably 0.5 or higher. F11 In this context, the e / f ratio can be, for example, 0.2 or more and less than 0.9, more specifically 0.4 or more and 0.8 or less, and more specifically 0.5 or more and 0.7 or less.

[0111] In one embodiment, R F11 In this embodiment, d1 is preferably an integer of 1 or more, more preferably 3 or more, even more preferably 6 or more, and may be 200 or less, 120 or less, 60 or less, or 54 or less.

[0112] In one embodiment, R F11 teeth, -(OC3F6) d1 -(OC2F4) e1 - (f11) [In the formula, d1 is an integer between 3 and 60, preferably between 6 and 54; e1 is 1; and OC3F6 and OC2F4 are linear.] It is a base represented by .

[0113] In one embodiment, R F11 teeth, -(OC3F6) d1 -(OC2F4) e1 - (f11) [In the formula, d1 is an integer between 3 and 120, preferably between 6 and 60; e1 is 1; and each OC3F6 and OC2F4 has a branched chain.] This is a base represented by . For example, in formula (f11), the repeating unit is represented by -OCF(CF3)CF2-.

[0114] The above R F11 The number-average molecular weight of the part is not particularly limited, but is, for example, 500 to 30,000, preferably 1,500 to 30,000, and more preferably 2,000 to 10,000. In this specification, R F11 The number-average molecular weight is, 19 The value shall be measured by 1F-NMR.

[0115] In another embodiment, R F11 The number-average molecular weight of the part may be 500 to 30,000, preferably 1,000 to 20,000, more preferably 2,000 to 15,000, and even more preferably 2,000 to 10,000, for example, 3,000 to 6,000.

[0116] In another embodiment, R F11 The number-average molecular weight of the part may be 4,000 to 30,000, preferably 5,000 to 10,000, and more preferably 6,000 to 10,000.

[0117] ·R F12 -(C s R c1 2s ) s1 -(R d ) s2 - (f2)

[0118] R c1 These are, independently, a hydrogen atom, a fluorine atom, or a chlorine atom. R d These are all independently arylene groups, which may be substituted with fluorine atoms. However, R d substituents or R c1 At least one of them is a fluorine atom. The above-mentioned arylene group refers to a divalent organic group obtained by removing two hydrogen atoms from the ring structure of an aromatic hydrocarbon group. For example, the phenylene group can be cited as an arylene group.

[0119] In one embodiment, R c1 This is a fluorine atom.

[0120] In one aspect, -C s R c1 2s -In all R c1 It is substituted with a fluorine atom. That is, -C s R c1 2s - represents a perfluoroalkylene group, i.e., -(C s F 2s )-is.

[0121] In one embodiment, R d (Specifically, R d The hydrogen atoms (of R) are at least partially replaced by fluorine atoms. That is, R d This is an arylene group substituted with a fluorine atom.

[0122] In one embodiment, R d In this model, all hydrogen atoms are replaced by fluorine atoms.

[0123] In one embodiment, R F12 In this embodiment, the arylene group is a phenylene group. The phenylene group may have a bonded position at the ortho, meta, or para position. In one embodiment, the phenylene group has a bonded position at the para position.

[0124] In one embodiment, R F12In this compound, all hydrogen atoms of the phenylene group are replaced by fluorine atoms.

[0125] s is an integer between 1 and 10.

[0126] s1 is a non-negative integer, and s2 is a non-negative integer. The sum of s1 and s2 is 1 or greater. The order of existence of each repeating unit enclosed in parentheses with s1 or s2 is arbitrary in the expression.

[0127] In one embodiment, s1 is an integer between 0 and 20, and s2 is an integer between 0 and 10. The sum of s1 and s2 is 1 or greater.

[0128] ·R F13 Rf 4 These are, independently, -(C s R c1 2s ) s1 - is represented by a base or -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - is the group represented by -(C s R c1 2s ) s1 -and-(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - These are equivalent to the above.

[0129] Each of a3 is an independent integer between 1 and 10, for example, 1, 2, 3, 4, 5, or 6.

[0130] Q is a base that is independently represented by either equation (f31) or equation (f32). [ka]

[0131] R 1 These are, independently, hydrogen atoms and C 1-10 The alkyl group is (e.g., methyl group, ethyl group, n-propyl group) or aryl group (e.g., phenyl group), preferably a hydrogen atom.

[0132] X 31 These include, independently, substituted or unsubstituted divalent carbon-hydrogen groups, or substituted or unsubstituted divalent hydrocarbon groups that have at least one atom selected from the group consisting of oxygen, nitrogen, and silicon atoms interposed in the middle of the bond. Examples of divalent carbon-hydrogen groups include divalent hydrocarbon groups with 1 to 20 carbon atoms, particularly 2 to 10 carbon atoms. Typical examples include alkylene groups such as methylene, ethylene, propylene, methylethylene, butylene, and hexamethylene. More representative examples include C 1-3 alkylene group; cyclohexylene group, etc. 3-6 Cycloalkylene groups; arylene groups such as phenylene, torylene, xylylene, naphthylene, and biphenylylene; and more specifically, phenylene and torylene groups. 6-8 Examples include arylene groups; or groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms, etc., or combinations of substituted or unsubstituted alkylene groups and arylene groups. Among these, ethylene groups and propylene groups are preferred in terms of ease of synthesis and stability of the compound.

[0133] X 31 In the divalent hydrocarbon group, the oxygen atom can be interposed as -O-, and the nitrogen atom as -NR 1 -(R 1 It can intervene as having the same meaning as above.

[0134] X 31In the divalent hydrocarbon group, the silicon atom can be interposed as a group containing a linear or cyclic organosiloxane or an organosilylene group, for example, as shown in the group below. [ka]

[0135] n is an integer between 0 and 10, typically between 0 and 5.

[0136] R 111 These are, independently, alkyl or aryl groups. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, and octyl groups. Particularly representative are alkyl groups with 1 to 6 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, and hexyl groups. Examples of aryl groups include aryl groups with 6 to 8 carbon atoms, such as phenyl, tolyl, and xylyl groups.

[0137] R 112 These are, independently, either an alkylene group or an arylene group. Examples of alkylene groups include alkylene groups with 1 to 10 carbon atoms, such as methylene, ethylene, propylene, butylene, pentylene, hexylene, heptylene, octylene, nonylene, and desilene. Examples of arylene groups include arylene groups with 6 to 10 carbon atoms, such as phenylene, torylene, xylylene, and naphthylene.

[0138] X 31 Specific examples of substituted or unsubstituted divalent hydrocarbon groups having at least one atom selected from the group consisting of oxygen, nitrogen, and silicon atoms interposed in the middle of the bond include, for example, those represented by the following formula. In the formula, Me is a methyl group. [ka] [ka]

[0139] X 32 These are, independently, substituted or unsubstituted divalent carbon-hydrogen groups. Examples of divalent carbon-hydrogen groups include divalent hydrocarbon groups having 1 to 20 carbon atoms, particularly 2 to 10 carbon atoms. Typical examples include alkylene groups such as methylene, ethylene, propylene, methylethylene, butylene, and hexamethylene, and even more typical examples include C 1-3 alkylene group; cyclohexylene group, etc. 3-6 Cycloalkylene groups; arylene groups such as phenylene, torylene, xylylene, naphthylene, and biphenylylene; and more specifically, phenylene and torylene groups. 6-8 Examples include arylene groups; or groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms, etc., or combinations of substituted or unsubstituted alkylene groups and arylene groups. Representative examples include alkylene groups such as methylene, ethylene, propylene, methylethylene, butylene, and hexamethylene groups, and even more representative examples include alkylene groups with 1 to 3 carbon atoms such as methylene, ethylene, and propylene groups; or groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms, etc.

[0140] Specific examples of groups represented by Q include the following. In the following, Me represents a methyl group, Ph represents a phenyl group, and Rf represents -(C s R c1 2s ) s1 - is represented by a base or -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - is the group represented by -(C s R c12s ) s1 -and-(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - is synonymous with the above. [ka]

[0141] ·R F14 Rf 4 These are, independently, -(C s R c1 2s ) s1 - is represented by a base or -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - is the group represented by -(C s R c1 2s ) s1 -and-(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - These are equivalent to the above.

[0142] X 121 ~X 124 These are H, F, OH, or -OSi(OR) respectively, independently. 121 )3. Three R's 121 Each of these is an alkyl group having 1 to 4 carbon atoms, independently of the others.

[0143] X a1 These are -C(=O)NH-, -NHC(=O)-, -O-, -C(=O)O-, -OC(=O)-, -OC(=O)O-, or -NHC(=O)NH- (the left side of each bond is CX).121 X 122 (To be joined.)

[0144] x1 is an integer between 0 and 10, y1 is 0 or 1, and z1 is an integer between 1 and 10.

[0145] R Si is at least one of the following groups represented by formulas (A1), (A2), (A3), (A4), or (A5). [ka]

[0146] ·Formula (A1): R 11 Each of these independently represents either a hydrogen atom or a halogen atom. The halogen atom is preferably an iodine atom, a chlorine atom, or a fluorine atom, and more preferably a fluorine atom.

[0147] R 12 Each of these independently represents either a hydrogen atom or a lower alkyl group. The lower alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, such as a methyl group, ethyl group, or propyl group.

[0148] R 13 Each of these independently represents either a hydroxyl group or a hydrolyzable group. The term "hydrolyzable group" has the same meaning as above.

[0149] R 14 Each of these independently represents a hydrogen atom or an alkyl group having 1 to 22 carbon atoms, preferably an alkyl group having 1 to 4 carbon atoms.

[0150] n1 is (-SiR 13 n1 R 14 3-n1 Each unit is an independent integer between 0 and 3, preferably between 1 and 3, and more preferably 3.

[0151] For example, at least two n1 are integers between 1 and 3. That is, not all n1 are 0 at the same time. In other words, at least two in the expression are R 13 A bonded Si atom exists. That is, in formula (A1), n1 is 1 or greater -SiR 13 n1 R 14 3-n1 Structure (i.e., -SiR 13 There are at least two parts.

[0152] X 2 Each of these independently represents a single bond or a divalent organic group. 2 Preferably, is an alkylene group having 1 to 20 carbon atoms, and more preferably -(CH2) u -(where u is an integer between 0 and 2)

[0153] Each of t is an integer between 1 and 10, independently of the others. In a preferred embodiment, t is an integer between 1 and 6. In another preferred embodiment, t is an integer between 2 and 10, preferably between 2 and 6.

[0154] ·Formula (A2): R 13 , R 14 , and n1 are defined in the same way as in equation (A1), respectively.

[0155] ·Formula (A3): R a These are, independently, -Z 3 -SiR 71 p1 R 72 q1 R 73 r1 It represents.

[0156] Z 3 Each of these independently represents an oxygen atom or a divalent organic group. Hereafter, Z 3 The structure described is such that the right side is SiR 71 p1 R 72 q1 R 73 r1Combine.

[0157] Z 3 Preferably, is a divalent organic group, and is the Si atom (R) at the end of the molecular backbone in formula (A3). a It does not contain any materials that form a siloxane bond with the Si atom to which it is bonded.

[0158] Z 3 Preferably, C 1-6 Alkylene group, -(CH2) g -O-(CH2) h -(wherein g is an integer between 0 and 6, and h is an integer between 0 and 6) or -(CH2) i -Phenylene-(CH2) j -(wherein i is an integer from 0 to 6 and j is an integer from 0 to 6). For example, g is an integer from 0 to 6 and h is an integer from 1 to 6. In another example, g is an integer from 1 to 6 and h is an integer from 0 to 6. For example, i is an integer from 0 to 6 and j is an integer from 1 to 6. In another example, i is an integer from 1 to 6 and j is an integer from 0 to 6. More preferably, Z 3 C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 They may be substituted with one or more substituents selected from alkynyl groups. In one embodiment, these groups are unsubstituted. From the viewpoint of particularly good UV resistance, the above Z 3 The above Z is more preferably a linear or branched alkylene group, and even more preferably a linear alkylene group. 3 The number of carbon atoms constituting the alkylene group is preferably in the range of 1 to 6, and more preferably in the range of 1 to 3. The alkylene group is as described above.

[0159] R 71 These are, independently, -Z 3’ -SiR 71’ p1’ R 72’q1’ R 73’ r1’ That is the case.

[0160] Z 3’ Each of these independently represents an oxygen atom or a divalent organic group. Hereafter, Z 3’ The structure described is such that the right side is SiR 71’ p1’ R 72’ q1’ R 73’ r1’ Combine.

[0161] Z 3’ Preferably, is a divalent organic group, and is the Si atom (R) at the end of the molecular backbone in formula (A3). 71 It does not contain any materials that form a siloxane bond with the Si atom to which it is bonded.

[0162] Z 3’ Preferably, C 1-6 Alkylene group, -(CH2) g’ -O-(CH2) h’ -(wherein g' is an integer between 0 and 6, and h' is an integer between 0 and 6) or -(CH2) i’ -Phenylene-(CH2) j’ -(wherein i' is an integer between 0 and 6, and j is an integer between 0 and 6). For example, g' is an integer between 0 and 6, and h' is an integer between 1 and 6. In another example, g' is an integer between 1 and 6, and h' is an integer between 0 and 6. For example, i' is an integer between 0 and 6, and j' is an integer between 1 and 6. In another example, i' is an integer between 1 and 6, and j' is an integer between 0 and 6. More preferably, Z 3’ C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 They may be substituted with one or more substituents selected from alkynyl groups. In one embodiment, these groups are unsubstituted. From the viewpoint of particularly good UV resistance, the above Z 3The above Z is more preferably a linear or branched alkylene group, and even more preferably a linear alkylene group. 3 The number of carbon atoms constituting the alkylene group is preferably in the range of 1 to 6, and more preferably in the range of 1 to 3. The alkylene group is as described above.

[0163] R 71’ These are, independently, -Z 3” -SiR 72” q1” R 73” r1” That is the case.

[0164] Z 3” Each of these independently represents an oxygen atom or a divalent organic group. Hereafter, Z 3” The structure described is such that the right side is SiR 72” q1” R 73” r1” Combine.

[0165] Z 3” Preferably, is a divalent organic group, and is the Si atom (R) at the end of the molecular backbone in formula (A3). 71’ It does not contain any materials that form a siloxane bond with the Si atom to which it is bonded.

[0166] Z 3” Preferably, C 1-6 Alkylene group, -(CH2) g” -O-(CH2) h” -(where g'' is an integer between 0 and 6, and h'' is an integer between 0 and 6) or -(CH2) i” -Phenylene-(CH2) j” -(where i'' is an integer between 0 and 6, and j'' is an integer between 0 and 6). For example, g'' is an integer between 0 and 6, and h'' is an integer between 1 and 6. In another example, g'' is an integer between 1 and 6, and h'' is an integer between 0 and 6. For example, i'' is an integer between 0 and 6, and j'' is an integer between 1 and 6. In another example, i'' is an integer between 1 and 6, and j'' is an integer between 0 and 6. More preferably, Z 3” C 1-3It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 They may be substituted with one or more substituents selected from alkynyl groups. In one embodiment, these groups are unsubstituted. From the viewpoint of particularly good UV resistance, the above Z 3 The above Z is more preferably a linear or branched alkylene group, and even more preferably a linear alkylene group. 3 The number of carbon atoms constituting the alkylene group is preferably in the range of 1 to 6, and more preferably in the range of 1 to 3. The alkylene group is as described above.

[0167] R 72” Each of these independently represents either a hydroxyl group or a hydrolyzable group. "Hydrolyzable group" has the same meaning as above.

[0168] Preferably, R 72” -OR (where R is the substitution or non-substitution of C) 1-3 It represents an alkyl group, more preferably a methyl group.

[0169] R 73” Each of these independently represents a hydrogen atom or a lower alkyl group. The lower alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and even more preferably a methyl group.

[0170] In the formula, each q1'' is an independent integer between 0 and 3; each r1'' is an independent integer between 0 and 3. However, (-Z 3” -R 72” q1” R 73” r1” In each case, the sum of q1'' and r1'' is 3.

[0171] In one embodiment, R 71’In this case, q1'' is preferably 2 or more, for example 2 or 3, and more preferably 3. For example, if q1'' is 2 or more, r1'' is 0 or 1.

[0172] R 72’ Each of these independently represents either a hydroxyl group or a hydrolyzable group. "Hydrolyzable group" has the same meaning as above.

[0173] Preferably, R 72’ -OR (where R is the substitution or non-substitution of C) 1-3 It represents an alkyl group, more preferably a methyl group.

[0174] R 73’ Each of these independently represents a hydrogen atom or a lower alkyl group. The lower alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and even more preferably a methyl group.

[0175] In the formula, p1' are each independent integers between 0 and 3; q1' are each independent integers between 0 and 3; and r1' are each independent integers between 0 and 3. However, (-Z 3’ -SiR 71’ p1’ R 72’ q1’ R 73’ r1’ In each case, the sum of p1', q1', and r1' is 3.

[0176] In a preferred embodiment, R a R at the end of the middle 71 In this case, q1' is preferably 2 or more, for example 2 or 3, and more preferably 3. For example, q1' is 2 or more, and r1' is 0 or 1.

[0177] R 72 Each of these independently represents either a hydroxyl group or a hydrolyzable group. "Hydrolyzable group" has the same meaning as above.

[0178] Preferably, R 72-OR (where R is the substitution or non-substitution of C) 1-3 It represents an alkyl group, more preferably a methyl group.

[0179] R 73 Each of these independently represents a hydrogen atom or a lower alkyl group. The lower alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and even more preferably a methyl group.

[0180] p1 are all independent integers between 0 and 3; q1 are all independent integers between 0 and 3; and r1 are all independent integers between 0 and 3. However, (-Z 3 -SiR 71 p1 R 72 q1 R 73 r1 In each case, the sum of p1, q1, and r1 is 3.

[0181] In one embodiment, R a In this case, q1 is preferably 2 or more, for example 2 or 3, and more preferably 3. For example, if q1 is 2 or more, r1 is 0 or 1.

[0182] R b Each of these independently represents either a hydroxyl group or a hydrolyzable group.

[0183] R b The group is preferably a hydroxyl group, -OR, -OCOR, -ON=C(R)2, -N(R)2, -NHR, or halogen (wherein R represents a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms), and more preferably -OR. R includes unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl groups; and substituted alkyl groups such as chloromethyl groups. Among these, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. The hydroxyl group is not particularly limited, but may be a group that has been hydrolyzed. More preferably R b-OR (where R is the substitution or non-substitution of C) 1-3 It represents an alkyl group, more preferably a methyl group.

[0184] R c Each of these independently represents a hydrogen atom or a lower alkyl group. The lower alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and even more preferably a methyl group.

[0185] In the formula, k1 is an independent integer between 0 and 3; l1 is an independent integer between 0 and 3; and m1 is an independent integer between 0 and 3. However, (SiR a k1 R b l1 R c m1 In each case, the sum of k1, l1, and m1 is 3.

[0186] In one embodiment, k1 is preferably an integer between 1 and 3, and more preferably 3. For example, k1 is an integer between 1 and 3, l1 is an integer between 0 and 2, and m1 is an integer between 0 and 2. In another example, k1 is an integer between 1 and 3, and l1 is an integer between 0 and 2.

[0187] ·Formula (A4) R d These are, independently, -Z 4 -CR 81 p2 R 82 q2 R 83 r2 It represents.

[0188] Z 4 Each of these independently represents an oxygen atom or a divalent organic group. 4 The structure described is such that the right side is CR. 81 p2 R 82 q2 R 83 r2 Combine.

[0189] In one embodiment, Z 4 It is an oxygen atom.

[0190] In one embodiment, Z 4 It is a divalent organic group.

[0191] In a preferred embodiment, Z 4 It does not contain siloxane bonds.

[0192] Z 4 Preferably, C 1-6 Alkylene group, -(CH2) g1 -O-(CH2) h1 -(wherein g1 is an integer from 0 to 6, and h1 is an integer from 0 to 6) or -(CH2) i1 -Phenylene-(CH2) j1 -(where i1 is an integer between 0 and 6, and j1 is an integer between 0 and 6). For example, g1 is an integer between 0 and 6, and h1 is an integer between 1 and 6. In another example, g1 is an integer between 1 and 6, and h1 is an integer between 0 and 6. For example, i1 is an integer between 0 and 6, and j1 is an integer between 1 and 6. In yet another example, i1 is an integer between 1 and 6, and j1 is an integer between 0 and 6. Z 4 is more C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 They may be substituted with one or more substituents selected from alkynyl groups. In one embodiment, these groups are unsubstituted.

[0193] In a preferred embodiment, Z 4 C 1-6 Alkylene group or -(CH2) i1 -Phenylene-(CH2) j1 -, preferably -phenylene-(CH2) j1 - is Z 4 If the group is such that the light resistance, especially UV resistance, can be increased.

[0194] In another preferred embodiment, the above Z 4 C 1-3 It is an alkylene group. In one embodiment, Z 4 This could be -CH2CH2CH2-. In another embodiment, Z 4 It can be -CH2CH2-.

[0195] R 81 These are, independently, -Z 4’ -CR 82’ q2’ R 83’ r2’ That is the case.

[0196] Z 4’ Each of these is independently a single bond, an oxygen atom, or a divalent organic group. (Note: Z follows) 4’ The structure described as follows is (CR) on the right side. 82’ q2’ R 83’ r2’ ) is joined to it.

[0197] In a preferred embodiment, Z 4’ It does not contain siloxane bonds.

[0198] Z 4’ Preferably, C 1-6 Alkylene group, -(CH2) g1’ -O-(CH2) h1’ -(where g1' is an integer between 0 and 6, and h1' is an integer between 0 and 6) or -(CH2) i1’ -Phenylene-(CH2) j1’ -(where i1' is an integer between 0 and 6, and j1' is an integer between 0 and 6). For example, g1' is an integer between 0 and 6, and h1' is an integer between 1 and 6. In another example, g1' is an integer between 1 and 6, and h1' is an integer between 0 and 6. For example, i1' is an integer between 0 and 6, and j1' is an integer between 1 and 6. In yet another example, i1' is an integer between 1 and 6, and j1' is an integer between 0 and 6. Z 4’ is more C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 They may be substituted with one or more substituents selected from alkynyl groups. In one embodiment, these groups are unsubstituted.

[0199] In a preferred embodiment, Z 4’ C 1-6 Alkylene group or -(CH2) i1’ -Phenylene-(CH2) j1’ -, preferably -phenylene-(CH2) j1’ - is Z 4’ If the group is such that the light resistance, especially UV resistance, can be increased.

[0200] In another preferred embodiment, the above Z 4’ C 1-3 It is an alkylene group. In one embodiment, Z 4’ This could be -CH2CH2CH2-. In another embodiment, Z 4’ It can be -CH2CH2-.

[0201] R 82’ These are, independently, -Y-SiR 84 n2 R 85 3-n2 That is the case.

[0202] Each Y is independently a single bond, an oxygen atom, or a divalent organic group. Note that in the following structure referred to as Y, the right side is (SiR 84 n2 R 85 3-n2 ) is joined to it.

[0203] In one embodiment, Y is an oxygen atom.

[0204] In one embodiment, Y is a divalent organic group.

[0205] In a preferred embodiment, Y does not contain a siloxane bond.

[0206] Y is preferably C 1-6 Alkylene group, -(CH2) g2 -O-(CH2) h2 -(where g2 is an integer between 0 and 6, and h2 is an integer between 0 and 6) or -(CH2) i2 -Phenylene-(CH2) j2 -(where i2 is an integer between 0 and 6, and j2 is an integer between 0 and 6). For example, g2 is an integer between 0 and 6, and h2 is an integer between 1 and 6. In another example, g2 is an integer between 1 and 6, and h2 is an integer between 0 and 6. For example, i2 is an integer between 0 and 6, and j2 is an integer between 1 and 6. In another example, i2 is an integer between 1 and 6, and j2 is an integer between 0 and 6. Such C 1-6 The alkylene group may be linear or branched, but is preferably linear. These groups include, for example, fluorine atoms, C 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 The alkynyl group may be substituted with one or more substituents selected from the alkynyl group, but is preferably unsubstituted.

[0207] In a preferred embodiment, Y is C 1-6 Alkylene group or -(CH2) i2 -Phenylene-(CH2) j2 -, preferably -phenylene-(CH2) j2 - If Y is the group involved, light resistance, especially UV resistance, can be increased.

[0208] In another preferred embodiment, Y is C 1-3 It is an alkylene group. In one embodiment, Y may be -CH2CH2CH2-. In another embodiment, Y may be -CH2CH2-.

[0209] R 84 These are, independently, hydroxyl groups or hydrolyzable groups.

[0210] R 84 Preferably, each of these is independently a hydrolyzable group.

[0211] R 84 Preferably, each is independently -OR h1 , -OCOR h1 , -ON=CR h1 2. -NR h1 2, -NHR h1 , -NCO, or halogen (wherein R in these formulas) h1 C is either substituted or non-substituted. 1-4 (representing an alkyl group), more preferably OR h1 (That is, an alkoxy group). h1 Examples include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl groups; and substituted alkyl groups such as chloromethyl groups. Among these, alkyl groups, particularly unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. In one embodiment, R h1 is a methyl group, and in another embodiment, R h1 This is an ethyl group.

[0212] R 85 These are each independently monovalent organic groups. Such monovalent organic groups are monovalent organic groups excluding the hydrolyzable groups mentioned above.

[0213] R 85 In this, the monovalent organic group is preferably C 1-20 It is an alkyl group, more preferably C 1-6 An alkyl group, more preferably a methyl group.

[0214] n2 is (SiR 84 n2 R 85 3-n2 Each unit is an independent integer between 0 and 3. However, in the terminal part of equation (A4), n2 is between 1 and 3 (SiR 84 n2 R 85 3-n2 There are at least two units. In other words, at the terminal part of formula (A4), there are at least two Si atoms to which a hydroxyl group or hydrolyzable group is attached.

[0215] n2 is (SiR 84 n2 R 85 3-n2 Each unit is independently an integer, preferably between 1 and 3, more preferably between 2 and 3, and even more preferably 3.

[0216] R 83’ Each of these is independently a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such a monovalent organic group is a monovalent organic group other than the hydrolyzable group mentioned above.

[0217] R 83’ In this, the monovalent organic group is preferably C 1-20 Alkyl or -(C s H 2s ) t1 -(OC s H 2s ) t2 (wherein s is an integer from 1 to 6, preferably from 2 to 4, t1 is 1 or 0, preferably 0, and t2 is an integer from 1 to 20, preferably from 2 to 10, more preferably from 2 to 6.) and more preferably C 1-20 Alkyl alkyl groups, more preferably C 1-6 An alkyl group, particularly preferably a methyl group.

[0218] In one embodiment, R 83’ This is a hydroxyl group.

[0219] In another embodiment, R 83’ This is a monovalent organic group, preferably C 1-20 It is an alkyl group, more preferably C 1-6 It is an alkyl group.

[0220] q2' are independent integers between 0 and 3; r2' are independent integers between 0 and 3. The sum of q2' and r2' is (CR 82’ q2’ R 83’ r2’ In units of 3, it is 3.

[0221] q2' is (CR 82’ q2’ R 83’ r2’ Each unit is independently an integer, preferably between 1 and 3, more preferably between 2 and 3, and even more preferably 3.

[0222] R 82 These are, independently, -Y-SiR 84 n2 R 85 3-n2 This is the case. 84 n2 R 85 3-n2 The above R 82’ This is equivalent to the description in [the relevant section].

[0223] R 83 Each of these is independently a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such a monovalent organic group is a monovalent organic group other than the hydrolyzable group mentioned above.

[0224] R 83 In this, the monovalent organic group is preferably C 1-20 Alkyl or -(C s H 2s ) t1 -(OC s H 2s ) t2 (wherein s is an integer from 1 to 6, preferably from 2 to 4; t1 is 1 or 0, preferably 0; t2 is an integer from 1 to 20, preferably from 2 to 10, more preferably from 2 to 6.) and more preferably C 1-20 Alkyl alkyl groups, more preferably C 1-6 An alkyl group, particularly preferably a methyl group.

[0225] In one embodiment, R 83 This is a hydroxyl group.

[0226] In another embodiment, R 83 This is a monovalent organic group, preferably C 1-20 It is an alkyl group, more preferably C 1-6It is an alkyl group.

[0227] p2 are independent integers between 0 and 3, q2 are independent integers between 0 and 3, and r2 are independent integers between 0 and 3. The sum of p2, q2, and r2 is (CR). 81 p2 R 82 q2 R 83 r2 In units of 3, it is 3.

[0228] In one embodiment, p2 is 0.

[0229] In one embodiment, p2 is (CR 81 p2 R 82 q2 R 83 r2 Each unit may independently be an integer from 1 to 3, an integer from 2 to 3, or 3. In a preferred embodiment, p2 is 3.

[0230] In one embodiment, q2 is (CR 81 p2 R 82 q2 R 83 r2 Each unit is an integer between 1 and 3, preferably between 2 and 3, and more preferably 3.

[0231] In one embodiment, p2 is 0 and q2 is (CR 81 p2 R 82 q2 R 83 r2 Each unit is an integer between 1 and 3, preferably between 2 and 3, and more preferably 3.

[0232] R e These are, independently, -Y-SiR 84 n2 R 85 3-n2 This represents -Y-SiR.84 n2 R 85 3-n2 The above R 82’ This is equivalent to the description in [the relevant section].

[0233] R f Each of these independently represents a hydrogen atom, a hydroxyl group, or a lower alkyl group. Preferably, R f Each of these independently represents a hydrogen atom or a lower alkyl group. The lower alkyl group is preferably an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and even more preferably a methyl group.

[0234] In one embodiment, R f This is a hydroxyl group.

[0235] In another embodiment, R f This is a monovalent organic group, preferably C 1-20 It is an alkyl group, more preferably C 1-6 It is an alkyl group.

[0236] k2 are independent integers between 0 and 3; l2 are independent integers between 0 and 3; and m2 are independent integers between 0 and 3. The sum of k2, l2, and m2 is 3.

[0237] In one embodiment, at least one k2 is 2 or 3, preferably 3. For example, at least one k2 is 2 or 3, and l2 is 0 or 1.

[0238] In one embodiment, k2 is 2 or 3, preferably 3. For example, k2 is 2 or 3, and l2 is 0 or 1.

[0239] In one embodiment, l2 is 2 or 3, preferably 3. For example, l2 is 2 or 3, and m2 is 0 or 1.

[0240] (SiR 84 n2 R 853-n2 The units are present in groups of two or more, for example, 2 to 27, preferably 2 to 9, more preferably 2 to 6, even more preferably 2 to 3, and particularly preferably 3, at each terminal part of formula (A4).

[0241] In a preferred embodiment, in formula (A4), R 82’ If present, at least one, preferably all R 82’ In this, n2 is an integer between 1 and 3, preferably 2 or 3, more preferably 3.

[0242] In a preferred embodiment, in formula (A4), R 82 If present, at least one, preferably all R 82 In this, n2 is an integer between 1 and 3, preferably 2 or 3, more preferably 3.

[0243] In a preferred embodiment, in formula (A4), R e If present, at least one, preferably all R e In this, n2 is an integer between 1 and 3, preferably 2 or 3, more preferably 3.

[0244] In a preferred embodiment, in formula (A4), k2 is 0, l2 is 2 or 3, preferably 3, and n2 is 2 or 3, preferably 3.

[0245] ·Formula (A5) R g and R h These are, independently, -Z 5 -SiR 13 n1 R 14 3-n1 , -Z 5 -SiR a k1 R b l1 R c m1 , -Z 5 -CR d k2 R el2 R f m2 Here, R 13 , R 14 , R a , R b , R c , R d , R e , R f n1, k1, l1, m1, k2, l2, and m2 have the same meaning as above.

[0246] In a preferred embodiment, R g and R h These are, independently, -Z 5 -SiR 13 n1 R 14 3-n1 That is the case.

[0247] The above Z 5 Each of these is independently a single bond, an oxygen atom, or a divalent organic group. (Note: Z follows) 5 The structure described as follows is (SiR 13 n1 R 14 3-n1 ), (-SiR a k1 R b l1 R c m1 ) or (-CR d k2 R e l2 R f m ) is joined to it.

[0248] In one embodiment, Z 5 It is an oxygen atom.

[0249] In one embodiment, Z 5 It is a divalent organic group.

[0250] In a preferred embodiment, Z 5 It does not contain siloxane bonds.

[0251] Z 5Preferably, C 1-6 Alkylene group, -(CH2) g2’ -O-(CH2) h2’ -(where g2' is an integer between 0 and 6, and h2' is an integer between 0 and 6) or -(CH2) i2’ -Phenylene-(CH2) j2’ -(where i2' is an integer between 0 and 6, and j2' is an integer between 0 and 6). For example, g2' is an integer between 0 and 6, and h2' is an integer between 1 and 6. In another example, g2' is an integer between 1 and 6, and h2' is an integer between 0 and 6. For example, i2' is an integer between 0 and 6, and j2' is an integer between 1 and 6. In another example, i2' is an integer between 1 and 6, and j2' is an integer between 0 and 6. Such C 1-6 The alkylene group may be linear or branched, but is preferably linear. These groups may include, for example, a fluorine atom, C 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, and C 2-6 The alkynyl group may be substituted with one or more substituents selected from the alkynyl group, but is preferably unsubstituted.

[0252] In one embodiment, Z 5 C 1-6 Alkylene group or -(CH2) i2’ -Phenylene-(CH2) j2’ -, preferably -phenylene-(CH2) j2’ - is Z 5 If the group is such that the light resistance, especially UV resistance, can be increased.

[0253] In another embodiment, the above Z 5 C 1-3 It is an alkylene group. In one embodiment, Z 5 This could be -CH2CH2CH2-. In another embodiment, Z 5 It can be -CH2CH2-.

[0254] In one embodiment, formulas (A1), (A2), (A3), (A4), and (A5) do not contain siloxane bonds.

[0255] In one embodiment, R Si This is a base represented by formula (A3), (A4), or (A5).

[0256] In one embodiment, R Si is a group represented by formula (A2). In a preferred embodiment, n1 is 1 to 3, preferably 2 to 3, and more preferably 3.

[0257] In one embodiment, R Si is a group represented by formula (A3). In a preferred embodiment, formula (A3) is -SiR a 2R c , or -SiR a 3, R a is, -Z 3 -SiR 72 q1 R 73 r1 And Z 3 C 1-6 Alkylene group, -(CH2) g -O-(CH2) h -, or -(CH2) i -Phenylene-(CH2) j -, preferably C 1-6 It is an alkylene group, and q1 is 1 to 3, preferably 2 to 3, and more preferably 3.

[0258] In one embodiment, R Si is a group represented by formula (A4). In a preferred embodiment, formula (A4) is -CR e 2R f , or -CR e 3, R e is -Y-SiR 85 n2 R 86 3-n2 And Y is C 1-6 Alkylene group, -(CH2) g2 -O-(CH2) h2 -or, -(CH2) i2 -Phenylene-(CH2) j2 -, preferably C 1-6It is an alkylene group, and n2 is 1 to 3, preferably 2 to 3, and more preferably 3.

[0259] In one embodiment, R Si is a group represented by formula (A5). In a preferred embodiment, R g and R h is, -Z 5 -SiR 13 n1 R 14 3-n1 And Z 5 C 1-6 Alkylene group, -(CH2) g2’ -O-(CH2) h2’ -or, -(CH2) i2’ -Phenylene-(CH2) j2’ -, preferably C 1-6 It is an alkylene group, and n1 is 1 to 3, preferably 2 to 3, and more preferably 3.

[0260] α1 are each an independent integer from 1 to 9, and X A It can change depending on the valence of X. In equation (A), α1 is X A This is the value obtained by subtracting 1 from the valence of X. A When it is a single bond, α1 is 1.

[0261] X A Each of these independently represents a single bond or a 2-10 valent organic group. A In the compound represented by formula (A), the perfluoro(poly)ether portion (i.e., -R) mainly provides water repellency and surface slipperiness. F1 - part) and R, which is a silane part that provides bonding ability with the substrate. Si It is understood to be a linker that connects the base. Therefore, X A The compound represented by formula (A) may be a single bond or any organic group, as long as it can exist stably. In this specification, X A The base described as such has R on the left side of the description. F1 The base represented by R is on the right side. Si They are then combined based on each other.

[0262] X A The organic group is preferably 2-7 valent, more preferably 2-4 valent, and even more preferably 2 valent.

[0263] In one embodiment, X A It is a single bond.

[0264] In one embodiment, X A -CO-, -COO-, -NR 1 -, -CONR 1 -, -OCONR 1 -, -NR 1 CO-, -NR 1 OCO-, -NR 1 -CO-NR 1 It is a divalent group containing -, -O-, -S-, or -SO2-. 1 These are, independently, hydrogen atoms and C 1-10 The alkyl group is (e.g., methyl group, ethyl group, n-propyl group) or aryl group (e.g., phenyl group), preferably a hydrogen atom.

[0265] X A Examples, though not limited to any specific case, include the following formula: -(R 31 ) p’ -(X a ) q’ - [In formula: R 31 This is a single bond, -(CH2) s’ - or o-, m- or p-phenylene group, preferably -(CH2) s’ -and, s' is an integer from 1 to 20, preferably an integer from 1 to 6, more preferably an integer from 1 to 3, and even more preferably 1 or 2. X a is, -(X b ) l’ - represents, X b These are -O-, -C(O)O-, and -NR, respectively, and are independent of each other. 1 -, -CONR 1-, -O-CONR 1 -, -S-, o-, m- or p-phenylene group, -Si(R 33 )2-,-(Si(R 33 )2O) m’ -Si(R 33 )2-, and -(CH2) n’ - Represents a group selected from the group consisting of, R 33 These are, independently, a phenyl group and a C 1-6 Alkyl alkyl group or C 1-6 Represents an alkoxy group, preferably a phenyl group or C 1-6 It is an alkyl group, more preferably a methyl group, R 1 These are, independently, hydrogen atoms and C 1-6 Representing an alkyl group (preferably a methyl group) or a phenyl group, m' is, in each occurrence, an integer between 1 and 100, preferably between 1 and 20, independently. n' is, in each occurrence, independently an integer between 1 and 20, preferably an integer between 1 and 6, more preferably an integer between 1 and 3. l' is an integer between 1 and 10, preferably between 1 and 5, more preferably between 1 and 3. p' is either 0 or 1. q' is either 0 or 1, Here, at least one of p' and q' is 1, and the order of existence of each repeating unit enclosed in parentheses with p' or q' is arbitrary. A divalent group represented by R is an example. Here, R 31 and X a (typically R 31 and X a The hydrogen atom of the fluorine atom, C 1-3 Alkyl and C 1-3 It may be substituted with one or more substituents selected from fluoroalkyl groups.

[0266] In one embodiment, l' is 1.

[0267] In one embodiment, the above XA is -(R 31 ) p’ -(X a ) q’ -R 32 -. R 32 represents a single bond, -(CH2) t’ - or an o-, m- or p-phenylene group, preferably -(CH2) t’ -. t’ is an integer from 1 to 20, preferably an integer from 2 to 6, more preferably an integer from 2 to 3. Here, R 32 (typically a hydrogen atom in R 32 ) may be substituted by one or more substituents selected from a fluorine atom, a C 1-3 alkyl group and a C 1-3 fluoroalkyl group.

[0268] X A is, for example, the following formula: -X 11 -X 12 - [where: X 11 is -CO-, -COO-, -NR 1 -, -CONR 1 -, -OCONR 1 -, -NR 1 -CO-NR 1 -, -O- or -S-, R 1 is a hydrogen atom or a C 1-6 alkyl group, X 12 is a single bond, or a C 1-6 alkylene group. ] is a group represented by.

[0269] X 11 is preferably -CO-, -CONR 1 -, or -OCONR 1 -. R 1 is preferably a hydrogen atom.

[0270] In one embodiment, X 12 is a single bond.

[0271] In another embodiment, X 12 is, or C 1-6 It is an alkylene group.

[0272] X 12 In or C 1-6 The alkylene group may be linear or branched. In one embodiment, the above C 1-6 The alkylene group is linear. In another embodiment, the above C 1-6 The alkylene group is a branched chain. (See above C) 1-6 The alkylene group is preferably C 1-4 Alkylene group, more preferably C 1-3 It is an alkylene group.

[0273] -X 11 -X 12 - is, for example, -CO-, -CONR 1 -X 12 - is R 1 X is preferably a hydrogen atom. 12 Preferably C 1-6 It is an alkylene group.

[0274] X A In one way, single bond, C 1-20 Alkylene group, for example, C 1-6 Alkylene group, C 1-3 Alkylene group, -X c -, -(CH2) s’ -X c -, -(CH2) s’ -X c -(CH2) t’ -, -X c -(CH2) t’ - It is represented as follows. s' and t' have the same meaning as above.

[0275] X c For example, -O-, -S- -C(O)O- -CONR 1 - -O-CONR 1 - -Si(R 33 )2- -(Si(R 33 )2O) m’ -Si(R 33 )2- -O-(CH2) u’ -(Si(R 33 )2O) m’ -Si(R 33 )2- -O-(CH2) u’ -Si(R 33 )2-O-Si(R 33 )2-CH2CH2-Si(R 33 )2-O-Si(R 33 )2- -O-(CH2) u’ -Si(OCH3)2OSi(OCH3)2- -CONR 1 -(CH2) u’ -(Si(R 33 )2O) m’ -Si(R 33 )2- -CONR 1 -(CH2) u’ -N(R 34 )- or -CONR 1 -(o-, m- or p-phenylene)-Si(R 33 )2- [wherein, R 33 , R 1 and m' have the same meanings as described above, u' is an integer from 1 to 20, preferably an integer from 2 to 6, more preferably an integer from 2 to 3. It is represented by the formula:

[0276] X c is -S- -C(O)O- -CONR 1 - -CONR1 -(CH2) u’ -(Si(R 33 )2O) m’ -Si(R 33 )2-, -CONR 1 -(CH2) u’ -NR 1 -, or -CONR 1 -(o-, m- or p-phenylene)-Si(R 33 )2- It may also be represented as follows.

[0277] Preferably, the above X A teeth, single bond, C 1-20 Alkylene group, -(CH2) s’ -O-(CH2) t’ -, -(CH2) s’ -(Si(R 33 )2O) m’ -Si(R 33 )2-(CH2) t’ -, -(CH2) s’ -O-(CH2) u’ -(Si(R 33 )2O) m’ -Si(R 33 )2-(CH2) t’ -, or -(CH2) s’ -O-(CH2) t’ -Si(R 33 )2-(CH2) u’ -Si(R 33 )2-(C v H 2v )- [In the formula, R 33 m', s', t', and u' have the same meaning as above, and v is an integer from 1 to 20, preferably from 2 to 6, more preferably from 2 to 3. That is the case.

[0278] In the above formula, -(C v H 2v)- may be a linear or branched chain, and may be, for example, -CH2-, -CH2CH2-, -CH2CH2CH2-, -CH(CH3)-, or -CH(CH3)CH2-.

[0279] The above X A The group consists of a fluorine atom and a carbon atom. 1-3 Alkyl and C 1-3 Fluoroalkyl groups (preferably C 1-3 It may be substituted with one or more substituents selected from perfluoroalkyl groups.

[0280] In one embodiment, X A The base is -OC 1-6 It may be a group other than an alkylene group.

[0281] In another embodiment, X A Examples of bases include the following: [ka] [ka] [In the formula, R 41 Each of these independently consists of a hydrogen atom, a phenyl group, an alkyl group having 1 to 6 carbon atoms, or C 1-6 An alkoxy group, preferably a methyl group; D is -CH2O(CH2)2-, -CH2O(CH2)3-, -CF2O(CH2)3-, -(CH2)2-, -(CH2)3-, -(CH2)4-, -CONH-(CH2)3-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3- (wherein Ph means phenyl), and [ka] (In the formula, R 42These are, independently, hydrogen atoms and C 1-6 alkyl group or C 1-6 (This represents an alkoxy group, preferably a methyl group or a methoxy group, more preferably a methyl group.) It is a base selected from, E is -(CH2) ne -(ne is an integer between 2 and 6), D is bound to the PFPE on the molecular backbone, and E is bound to the opposite group from PFPE.

[0282] The above X A Specific examples include: single bond, -CH2OCH2-, -CH2O(CH2)2-, -CH2O(CH2)3-, -CH2O(CH2)6-, -CF2-CH2-O-CH2-, -CF2-CH2-O-(CH2)2-, -CF2-CH2-O-(CH2)3-, -CF2-CH2-O-(CH2)6-, -CH2O(CH2)3Si(CH3)2OSi(CH3)2(CH2)2-, -CH2O(CH2)3Si(CH3)2OSi(CH3)2OSi(CH3)2(CH2)2-, -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O)2Si(CH3)2(CH2)2-, -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O)3Si(CH3)2(CH2)2-, -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O) 10 Si(CH3)2(CH2)2-, -CH2O(CH2)3Si(CH3)2O(Si(CH3)2O) 20 Si(CH3)2(CH2)2-, -CH2OCF2CHFOCF2-, -CH2OCF2CHFOCF2CF2-, -CH2OCF2CHFOCF2CF2CF2-、 -CH2OCH2CF2CF2OCF2-、 -CH2OCH2CF2CF2OCF2CF2-、 -CH2OCH2CF2CF2OCF2CF2CF2-、 -CH2OCH2CF2CF2OCF(CF3)CF2OCF2-、 -CH2OCH2CF2CF2OCF(CF3)CF2OCF2CF2-、 -CH2OCH2CF2CF2OCF(CF3)CF2OCF2CF2CF2-、 -CH2OCH2CHFCF2OCF2-、 -CH2OCH2CHFCF2OCF2CF2-、 -CH2OCH2CHFCF2OCF2CF2CF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2CF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2CF2CF2-、 -CH2OCF2CHFOCF2CF2CF2-C(O)NH-CH2-、 -CH2OCH2(CH2)7CH2Si(OCH3)2OSi(OCH3)2(CH2)2Si(OCH3)2OSi(OCH3)2(CH2)2-、 -CH2OCH2CH2CH2Si(OCH3)2OSi(OCH3)2(CH2)3-、 -CH2OCH2CH2CH2Si(OCH2CH3)2OSi(OCH2CH3)2(CH2)3-、 -CH2OCH2CH2CH2Si(OCH3)2OSi(OCH3)2(CH2)2-、 -CH2OCH2CH2CH2Si(OCH2CH3)2OSi(OCH2CH3)2(CH2)2-、 -(CH2)2-Si(CH3)2-(CH2)2-、 -CH2-、 -(CH2)2-、 -(CH2)3-、 -(CH2)4-、 -(CH2)5-, -(CH2)6-, -CF2-, -(CF2)2-, -CF2-CH2-, -CF2-(CH2)2-, -CF2-(CH2)3-, -CF2-(CH2)4-, -CF2-(CH2)5-, -CF2-(CH2)6-, -CO-, -CONH-, -CONH-CH2-, -CONH-(CH2)2-, -CONH-(CH2)3-, -CONH-(CH2)6-, -CF2CONH-, -CF2CONHCH2-, -CF2CONH(CH2)2-, -CF2CONH(CH2)3-, -CF2CONH(CH2)6-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3-(wherein Ph represents phenyl), -CON(CH3)-(CH2)6-, -CON(Ph)-(CH2)6-(wherein Ph represents phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3-(wherein Ph represents phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6-(wherein Ph represents phenyl), -CONH-(CH2)2NH(CH2)3-, -CONH-(CH2)6NH(CH2)3-, -CH2O-CONH-(CH2)3-, -CH2O-CONH-(CH2)6-, -S-(CH2)3-, -(CH2)2S(CH2)3-、 -CONH-(CH2)3Si(CH3)2OSi(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2OSi(CH3)2OSi(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O)2Si(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O)3Si(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O) 10 Si(CH3)2(CH2)2-、 -CONH-(CH2)3Si(CH3)2O(Si(CH3)2O) 20 Si(CH3)2(CH2)2-、 -C(O)O-(CH2)3-、 -C(O)O-(CH2)6-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-(CH2)2-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-CH(CH3)-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-(CH2)3-、 -CH2-O-(CH2)3-Si(CH3)2-(CH2)2-Si(CH3)2-CH(CH3)-CH2-、 -OCH2-、 -O(CH2)3-、 -OCFHCF2-、

Chem.

[0283] Among the above, X A is -CH2OCH2-、 -CH2O(CH2)2-、 -CH2O(CH2)3-、 -CH2O(CH2)6-、 -CF2-CH2-O-CH2-、 -CF2-CH2-O-(CH2)2-、 -CF2-CH2-O-(CH2)3-、 -CF2-CH2-O-(CH2)6-、 -CH2OCF2CHFOCF2-、 -CH2OCF2CHFOCF2CF2-、 -CH2OCF2CHFOCF2CF2CF2-、 -CH2OCH2CF2CF2OCF2-、 -CH2OCH2CF2CF2OCF2CF2-、 -CH2OCH2CF2CF2OCF2CF2CF2-、 -CH2OCH2CF2CF2OCF(CF3)CF2OCF2-、 -CH2OCH2CF2CF2OCF(CF3)CF2OCF2CF2-、 -CH2OCH2CF2CF2OCF(CF3)CF2OCF2CF2CF2-、 -CH2OCH2CHFCF2OCF2-、 -CH2OCH2CHFCF2OCF2CF2-、 -CH2OCH2CHFCF2OCF2CF2CF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2CF2-、 -CH2OCH2CHFCF2OCF(CF3)CF2OCF2CF2CF2-、 -CH2OCF2CHFOCF2CF2CF2-C(O)NH-CH2-、 -CH2-、 -(CH2)2-、 -(CH2)3-、 -(CH2)4-、 -(CH2)5-、 -(CH2)6-、 -CF2-、 -(CF2)2-、 -CF2-CH2-、 -CF2-(CH2)2-、 -CF2-(CH2)3-, -CF2-(CH2)4-, -CF2-(CH2)5-, -CF2-(CH2)6-, -CONH-, -CONH-CH2-, -CONH-(CH2)2-, -CONH-(CH2)3-, -CONH-(CH2)6-, -CF2CONH-, -CF2CONHCH2-, -CF2CONH(CH2)2-, -CF2CONH(CH2)3-, -CF2CONH(CH2)6-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3-(wherein Ph represents phenyl), -CON(CH3)-(CH2)6-, -CON(Ph)-(CH2)6-(wherein Ph represents phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3-(wherein Ph represents phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6-(wherein Ph represents phenyl), -CONH-(CH2)2NH(CH2)3-, -CONH-(CH2)6NH(CH2)3-, -CH2O-CONH-(CH2)3-, -CH2O-CONH-(CH2)6-, -OCH2-, -O(CH2)3-, or -OCFHCF2-, It is preferable that this be the case.

[0284] Of the above, more preferably, X A teeth, -CH2OCF2CHFOCF2CF2CF2-C(O)NH-CH2-, -CONH-, -CONH-CH2-, -CONH-(CH2)2-, -CONH-(CH2)3-, -CONH-(CH2)6-, -CF2CONH-, -CF2CONHCH2-, -CF2CONH(CH2)2-, -CF2CONH(CH2)3-, -CF2CONH(CH2)6-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3-(wherein Ph represents phenyl), -CON(CH3)-(CH2)6-, -CON(Ph)-(CH2)6-(wherein Ph represents phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3-(wherein Ph represents phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6-(wherein Ph represents phenyl), -CONH-(CH2)2NH(CH2)3-, -CONH-(CH2)6NH(CH2)3-, That is the case.

[0285] In one embodiment, X A X e’ It represents X. e’ This is a single bond, an alkylene group with 1 to 6 carbon atoms, -R 51 -C6H4-R 52 -, -R 51 -CONR 1 -R 52 -, -R 51 -CONR 1 -C6H4-R 52 -, -R 51 -CO-R 52-, -R 51 -CO-C6H4-R 52 -, -R 51 -SO2NR 1 -R 52 -, -R 51 -SO2NR 1 -C6H4-R 52 -, -R 51 -SO2-R 52 -, or R 51 -SO2-C6H4-R 52 - is R 51 and R 52 Each of these independently represents a single bond or an alkylene group having 1 to 6 carbon atoms, preferably a single bond or an alkylene group having 1 to 3 carbon atoms. 1 The above has the same meaning as above. The alkylene group is substituted or unsubstituted, preferably unsubstituted. Examples of substituents on the alkylene group include halogen atoms, preferably fluorine atoms. The alkylene group is linear or branched, preferably linear.

[0286] In a preferred embodiment, X e’ teeth, single bond, C 1-20 Alkylene group, for example, C 1-6 Alkylene group, C 1-3 Alkylene group, -C6H4-R 52 -, -CONR 1 -R 52 -, -CONR 1 -C6H4-R 52 -, -CO-R 52 -, -CO-C6H4-R 52 -, -SO2NR 1 -R 52 -, -SO2NR 1 -C6H4-R 52 -, -SO2-R 52 -, -SO2-C6H4-R52 -, -R 51 -C6H4-, -R 51 -CONR 1 -, -R 51 -CONR 1 -C6H4-, -R 51 -CO-, -R 51 -CO-C6H4-, -R 51 -SO2NR 1 -, -R 51 -SO2NR 1 -C6H4-, -R 51 -SO2-, -R 51 -SO2-C6H4-, -C6H4-, -CONR 1 -, -CONR 1 -C6H4-, -CO-, -CO-C6H4-, -SO2NR 1 -, -SO2NR 1 -C6H4-, -SO2-, or -SO2-C6H4- (In the formula, R 51 , R 52 , R 1 Each of these terms is independent and has the same meaning as above. As described above, the alkylene group may be substituted or unsubstituted, and examples of substituents on the alkylene group include halogen atoms, preferably fluorine atoms. It is possible.

[0287] Among the above, X e’ Preferably, C 1-6 Alkylene group, preferably C 1-3 Alkylene group, -CONR 1 -R 52 -, -CONR 1 -C6H4-R 52 -, -R 51 -CONR 1 -, -R 51 -CONR 1 -C6H4-, -CONR 1 -, -CONR 1 -C6H4-, -R 51 -CONR 1 -, or -R 51 -CONR 1 -C6H4-, This is possible. In the formula, R 1 , R 51 and R 52 These terms are equivalent to the above.

[0288] In this configuration, X e’ For example, single bond, C 1-6 Alkylene group, -CONH-, -CONH-CH2-, -CONH-(CH2)2-, -CONH-(CH2)3-, -CON(CH3)-, -CON(CH3)-CH2-, -CON(CH3)-(CH2)2-, -CON(CH3)-(CH2)3-, -CH2-CONH-, -CH2-CONH-CH2-, -CH2-CONH-(CH2)2-, -CH2-CONH-(CH2)3-, -CONH-C6H4-, -CON(CH3)-C6H4-, -CH2-CON(CH3)-CH2-, -CH2-CON(CH3)-(CH2)2-, -CH2-CON(CH3)-(CH2)3-, -CON(CH3)-C6H4-, -CO-, -CO-C6H4-, -C6H4-, -SO2NH-, -SO2NH-CH2-, -SO2NH-(CH2)2-, -SO2NH-(CH2)3-, -SO2NH-C6H4-, -SO2N(CH3)-, -SO2N(CH3)-CH2-, -SO2N(CH3)-(CH2)2-, -SO2N(CH3)-(CH2)3-, -SO2N(CH3)-C6H4-, -SO2-, -SO2-CH2-, -SO2-(CH2)2-, -SO2-(CH2)3-, or -SO2-C6H4- These are some examples.

[0289] Among those listed above, the more preferred X e’ As for, -CONH-, -CONH-CH2-, -CONH-(CH2)2-, -CONH-(CH2)3-, -CON(CH3)-, -CON(CH3)-CH2-, -CON(CH3)-(CH2)2-, -CON(CH3)-(CH2)3-, -CH2-CONH-, -CH2-CONH-CH2-, -CH2-CONH-(CH2)2-, -CH2-CONH-(CH2)3-, -CONH-C6H4-, -CON(CH3)-C6H4-, -CH2-CON(CH3)-CH2-, -CH2-CON(CH3)-(CH2)2-, -CH2-CON(CH3)-(CH2)3-, -CON(CH3)-C6H4- These are some examples.

[0290] In another embodiment, X A is, formula:-(R 16 ) x -(CFR 17 ) y -(CH2) z This is a base represented by -. In the formula, x, y, and z are each independent integers between 0 and 10, the sum of x, y, and z is 1 or greater, and the order of existence of each repeating unit enclosed in parentheses is arbitrary in the formula.

[0291] In the above formula, R 16 In each appearance, the oxygen atom, phenylene, carbasoliene, and -NR appear independently. 18 -(In the formula, R 18 R represents a hydrogen atom or an organic group) or a divalent organic group. Preferably, 16 This is an oxygen atom or a divalent polar group.

[0292] The above-mentioned "divalent polar group" is not particularly limited, but includes -C(O)-, -C(=NR 9 )-, and C(O)NR 1 -(In these formulas, R 1 (The above is synonymous with the above.)

[0293] In the above formula, R 17 Each instance is independently a hydrogen atom, a fluorine atom, or a lower fluoroalkyl group, preferably a fluorine atom. The "lower fluoroalkyl group" is, for example, a fluoroalkyl group having 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms, preferably a perfluoroalkyl group having 1 to 3 carbon atoms, more preferably a trifluoromethyl group, a pentafluoroethyl group, and even more preferably a trifluoromethyl group.

[0294] In this embodiment, X A Preferably, the formula is: -(O) x -(CF2) y -(CH2) z - (wherein x, y, and z have the same meaning as above, and the order of existence of each repeating unit enclosed in parentheses is arbitrary in the formula) is a base represented by -.

[0295] The above formula: -(O) x -(CF2) y -(CH2) z Examples of bases represented by - include -(O) x’ -(CH2) z” -O-[(CH2) z’’’ -O-] z”” , and (O) x’ -(CF2) y” -(CH2) z” -O-[(CH2) z’’’ -O-] z”” Examples of bases are those represented by the formula (where x' is 0 or 1, y'', z'', and z'''' are each independent integers between 1 and 10, and z'''' is 0 or 1). Note that the leftmost end of these bases is R F1 It connects to the side.

[0296] In another preferred embodiment, X A is, -O-CFR 20 -(CF2) e’ - is

[0297] The above R 20 Each of these independently represents a fluorine atom or a lower fluoroalkyl group. Here, the lower fluoroalkyl group is, for example, a fluoroalkyl group having 1 to 3 carbon atoms, preferably a perfluoroalkyl group having 1 to 3 carbon atoms, more preferably a trifluoromethyl group, a pentafluoroethyl group, and even more preferably a trifluoromethyl group.

[0298] Each of the above e's is independently either 0 or 1.

[0299] In one specific example, R 20is a fluorine atom, and e' is 1.

[0300] In yet another embodiment, X A Examples of bases include the following: [ka] [In the formula, R 41 Each of these independently consists of a hydrogen atom, a phenyl group, an alkyl group having 1 to 6 carbon atoms, or C 1-6 An alkoxy group, preferably a methyl group; each X A In the group, any number of T members can be any of the following groups that bind to the PFPE of the molecular backbone: -CH2O(CH2)2-, -CH2O(CH2)3-, -CF2O(CH2)3-, -CH2-, -(CH2)2-, -(CH2)3-, -(CH2)4-, -CONH-(CH2)3-, -CON(CH3)-(CH2)3-, -CON(Ph)-(CH2)3- (wherein Ph means phenyl), or [ka] [In the formula, R 42 These are, independently, hydrogen atoms and C 1-6 alkyl group or C 1-6 This represents an alkoxy group, preferably a methyl group or a methoxy group, more preferably a methyl group. And some of the other T groups are linked to the opposite group of PFPE in the molecular backbone -(CH2) n” -(n'' is an integer from 2 to 6), and if present, the remaining T are independently a methyl group, a phenyl group, and C 1-6 It may be an alkoxy group, a radical scavenging group, or an ultraviolet absorbing group. In addition, in the above embodiment, X A In the base described as, the left side is RF1 Based on this, the right side is R Si They are then combined based on each other.

[0301] The radical scavenging group is not particularly limited as long as it can capture radicals generated by light irradiation, but examples include residues of benzophenones, benzotriazoles, benzoic acid esters, phenyl salicylates, crotonic acids, malonic acid esters, organoacrylates, hindered amines, hindered phenols, or triazines.

[0302] The ultraviolet absorbing group is not particularly limited as long as it can absorb ultraviolet light, but examples include residues of benzotriazoles, hydroxybenzophenones, substituted and unsubstituted benzoic acid or salicylic acid compounds, acrylates or alkoxycinnamates, oxamides, oxanilides, benzoxazinones, and benzoxazoles.

[0303] In a preferred embodiment, preferred radical scavenging groups or ultraviolet absorbing groups are: [ka] These are some examples.

[0304] In this embodiment, X A This can be a 3- to 10-valent organic group.

[0305] (PFPE compounds and hydrosilyl compounds containing carbon-carbon double bonds) • PFPE compounds containing carbon-carbon double bonds A carbon-carbon double bond-containing PFPE compound has two or more carbon-carbon double bonds, i.e., alkenyl groups, in one molecule, preferably two alkenyl groups.

[0306] The above alkenyl group is preferably a group having 2 to 8 carbon atoms, and more preferably a group having 2 to 6 carbon atoms. Examples of the above alkenyl group include vinyl group, allyl group, propenyl group, isopropenyl group, butenyl group, hexenyl group, acrylic group, etc., with vinyl group or allyl group being particularly preferred.

[0307] The above alkenyl groups are preferably present at both ends of the molecular backbone of the carbon-carbon double bond-containing PFPE compound. Here, the molecular backbone refers to the relatively longest bond chain in the molecule of the carbon-carbon double bond-containing PFPE compound.

[0308] Carbon-carbon double bond-containing PFPE compounds have, for example, a structure represented by the following formula. [ka]

[0309] X A Base and R F1 The term "base" has the same meaning as above.

[0310] β1 are each an independent integer from 1 to 9, and X A It can change depending on the valence of X. In equation (A), β1 is X A This is the value obtained by subtracting 1 from the valence of X. A When it is a single bond, β1 is 1.

[0311] R AL It has a structure represented by the following formula. [ka]

[0312] R 21 is, -X A -and-A 1 (R 22 -CH=CH2) β11 R 23 n21-β11 It can be a linking group that connects and . 21For example, each is independently a single bond, -C(=O)NR 1 It is represented as - or -O-.

[0313] R 1 This is equivalent to the above. Preferably, R 1 It is a hydrogen atom.

[0314] A 1 This is an atom that has n21 branched structures.

[0315] A 1 These are, for example, silicon atoms, carbon atoms, or nitrogen atoms.

[0316] A 1 If n21 is a silicon atom or a carbon atom, then n21 is 3. 21 -R is an integer number of -R values ​​from 1 to 3. 22 -CH=CH2 and integers R from 0 to 2 23 It combines with β11. That is, β11 is an integer between 1 and 3.

[0317] A 1 If it is a nitrogen atom, then n21 is 2. 21 is 1 or 2 -R 22 -CH=CH2 and 0 or 1 R 23 It binds to β11. That is, β11 is either 1 or 2.

[0318] In one aspect, A 1 is a silicon atom. In one embodiment, A 1 is a carbon atom. In one embodiment, A 1 It is a nitrogen atom.

[0319] β11 may be 1, 2, or 3.

[0320] R 22 is a single bond or a divalent organic group. In one embodiment, R 22 It is a single bond. In one embodiment, R 22 It is a divalent organic group.

[0321] R 22 If R is a divalent organic group, 22 For example, -R 24 -CH2-, -R 24 -OCH2-, -R 24 -CH2OCH2-, -R 24 -C(=O)-, -R 24 -OC(=O)- or -R 24 -CO-NR 1 -R 25 -A group represented by - can be given. The above divalent organic group is the left side of the above formula (i.e., R 24 On the side, A 1 It combines with it.

[0322] In the above embodiment, the above R 24 R is a single bond or a divalent hydrocarbon group having 1 to 15 carbon atoms, and may also contain an ether bond. 24 Examples of the hydrocarbon group in this context include an alkylene group or an alkylene group which may contain an ether oxygen. The alkylene group may be substituted or unsubstituted as described above.

[0323] In one embodiment, the above R 24 This is a single bond. In another embodiment, the above R 24 This is a divalent hydrocarbon group, preferably an alkylene group in which at least some of the hydrogen atoms are substituted with fluorine atoms, such as -CFH-, -CF2-, -(CF2)2-, -(CF2)3-, and more specifically, -CF2-.

[0324] The above -R 22 -CH=CH2 is, for example, -CH=CH2, -R 24 -C(=O)-CH=CH2, -R 24 -OC(=O)-CH=CH2 is a possible combination.

[0325] In the above embodiment, the above R 25This is a -CH2- or o,m, or p-dimethylsilylphenylene group represented by the following formula. In the following formula, the phenylene group is bonded to the N atom, and the Si atom is bonded to the -CH=CH2 group. [ka]

[0326] R 22 Preferably, a single bond or C 1-6 It is an alkylene group, for example, a single bond or -CH2-, specifically -CH2-.

[0327] R 23 This is a hydrolyzable group, a hydroxyl group, or a monovalent organic group. Here, a monovalent organic group does not include a hydrolyzable group.

[0328] The monovalent organic group is C 1-10 Examples of alkylene groups include methyl groups and ethyl groups.

[0329] A carbon-carbon double bond-containing PFPE compound may have, for example, one of the following structures: [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka] [ka]

[0330] In the above formulas, p1, q1, r1, and s1 are each independent integers between 1 and 200, and the sum of p1, q1, r1, and s1 in each formula is an integer between 20 and 450. qs1 and qs2 are each independent integers between 0 and 222, and the sum of qs1 and qs2 is an integer between 8 and 222. The order of existence of each repeating unit enclosed in parentheses is arbitrary within the formula. Me represents a methyl group, and Et represents an ethyl group.

[0331] • Hydrosilyl compounds A hydrosilyl compound has two or more hydrogen atoms (Si-H) bonded to a silicon atom in one molecule. The hydrosilyl compound can function as a crosslinking agent or chain length extender for the carbon-carbon double bond-containing PFPE compound. By including the hydrosilyl compound, the physical properties (e.g., tensile strength or elastic modulus) of the first coating portion 3 can be improved.

[0332] The above Si-H is preferably located at the end of the molecular chain of the hydrosilyl compound.

[0333] Hydrosilyl compounds preferably have two or more silicon atoms having Si-H bonds in one molecule.

[0334] The hydrosilyl compound preferably has one or more fluorine-containing groups in its molecular structure, such as a monovalent perfluoroalkyl group, a monovalent perfluorooxyalkyl group, a divalent perfluoroalkylene group, or a divalent perfluorooxyalkylene group. Having such a structure can improve the compatibility and dispersibility of the hydrosilyl compound and the carbon-carbon double bond-containing PFPE compound contained in the material constituting the first coating 3, and can also improve the uniformity of the first coating 3.

[0335] The number of carbon atoms in the above monovalent perfluoroalkyl group is preferably 1 to 20, and more preferably 2 to 10. The perfluoroalkyl group may be linear or branched, but is preferably linear.

[0336] The above monovalent perfluorooxyalkyl group is Rf 3 -R F -O q The group is preferably represented by -. F And q have the same meaning as above.

[0337] R F Preferably, the formula is: -(OC6F 12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - It is represented as R F The chain may be linear or branched, but is preferably linear. a1, b1, c1, d1, e1, and f1 have the same meaning as described above.

[0338] a1, b1, c1, and d1 are each independent integers between 0 and 30, and e1 and f1 are each independent integers between 1 and 200. Preferably, the sum of a1, b1, c1, d1, e1, and f1 is 5 or more, more preferably 10 or more, for example, between 10 and 200.

[0339] Preferably, R F is -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 -(In the formula, c1 and d1 are each independent integers between 0 and 30, e1 and f1 are each independent integers between 1 and 200, preferably between 5 and 200, more preferably between 10 and 200, and the order of existence of each repeating unit enclosed in parentheses with the subscripts c1, d1, e1, or f1 is arbitrary in the formula). Preferably, R F is -(OCF2CF2CF2CF2) c1 -(OCF2CF2CF2) d1 -(OCF2CF2) e1 -(OCF2) f1 -In one embodiment, R F is -(OC2F4) e1 -(OCF2) f1 -(In the formula, e1 and f1 are each independent integers between 1 and 200, preferably between 5 and 200, more preferably between 10 and 200, and the order of existence of each repeating unit enclosed in parentheses with the subscript e1 or f1 is arbitrary in the formula).

[0340] In the above formula, Rf 3 Each instance independently represents a chlorine atom, a fluorine atom, or a C1-C16 alkyl group which may be substituted with one or more fluorine or chlorine atoms.

[0341] In the above-mentioned alkyl group having 1 to 16 carbon atoms, which may be substituted with one or more fluorine atoms, the "alkyl group having 1 to 16 carbon atoms" may be linear or branched, preferably a linear or branched alkyl group having 1 to 6 carbon atoms, particularly one having 1 to 3 carbon atoms, and more preferably a linear alkyl group having 1 to 3 carbon atoms.

[0342] The above Rf 3 Preferably, is a fluorine atom, or an alkyl group having 1 to 16 carbon atoms substituted with one or more fluorine atoms, more preferably CF2H-C 1-15 Fluoroalkylene group or C 1-16 It is a perfluoroalkyl group, and more preferably C 1-16 It is a perfluoroalkyl group.

[0343] The perfluoroalkyl group having 1 to 16 carbon atoms may be linear or branched, preferably a linear or branched perfluoroalkyl group having 1 to 6 carbon atoms, particularly a perfluoroalkyl group having 1 to 3 carbon atoms, and more preferably a linear perfluoroalkyl group having 1 to 3 carbon atoms, specifically -CF3, -CF2CF3, or CF2CF2CF3.

[0344] Preferably, the monovalent perfluorooxyalkyl group is Rf 3 -(OC2F4) e1 -(OCF2) f1 -(In the formula, e1 and f1 are each independent integers between 1 and 200, preferably between 5 and 200, and more preferably between 10 and 200, and the order of existence of each repeating unit enclosed in parentheses with the subscript e" or f" is arbitrary in the formula).

[0345] The number of carbon atoms in the above-mentioned divalent perfluoroalkylene group is preferably 1 to 20, and more preferably 2 to 10. The perfluoroalkylene group may be linear or branched, but is preferably linear.

[0346] The above divalent perfluorooxyalkylene group is -R F It is preferable to represent it as -(OC4F8). c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 It is more preferable that the group be represented by -. c1, d1, e1, and f1 have the same meaning as above. The perfluorooxyalkyl group may be linear or branched, but is preferably linear.

[0347] The fluorine-containing group described above is preferably a monovalent perfluoroalkyl group or a divalent perfluoroalkylene group. The fluorine-containing group and the silicon atom can be linked by a divalent organic group. The term "divalent organic group" is equivalent to the term used above.

[0348] The above-mentioned divalent organic groups may be alkylene groups, arylene groups, and combinations thereof, or groups with ether-bonded oxygen atoms, amide bonds, carbonyl bonds, etc., interposed between them. Examples of such divalent organic groups include: -CH2CH2-, -CH2CH2CH2-, -CH2CH2CH2OCH2-, -CH2CH2CH2-NH-CO-, -CH2CH2CH2-N(Ph)-CO- (where Ph is a phenyl group), -CH2CH2CH2-N(CH3)-CO-, -CH2CH2CH2-O-CO- Examples include groups having 2 to 12 carbon atoms. The above divalent organic groups are bonded to a Si atom on the left side and to a fluorine-containing group on the right side.

[0349] In hydrosilyl compounds, monovalent substituents bonded to a silicon atom, other than the fluorine-containing groups mentioned above, include, for example, alkyl groups such as methyl, ethyl, propyl, butyl, hexyl, cyclohexyl, octyl, and decyl groups; alkenyl groups such as vinyl and allyl groups; aryl groups such as phenyl, tolyl, and naphthyl groups; aralkyl groups such as benzyl and phenylethyl groups; and substituted or unsubstituted hydrocarbon groups having 1 to 20 carbon atoms, such as chloromethyl, chloropropyl, and cyanoethyl groups, in which at least some of the hydrogen atoms of these groups are substituted with chlorine atoms, cyano groups, etc.

[0350] Preferably, the hydrosilyl compound does not have alkoxy or epoxy groups as substituents bonded to the silicon atom.

[0351] The hydrosilyl compound may be cyclic, linear, three-dimensional network, or a combination thereof.

[0352] The number of silicon atoms in a hydrosilyl compound is not particularly limited, but is usually 2 to 60, preferably around 3 to 30.

[0353] Examples of hydrosilyl compounds include the following compounds. These compounds may be used individually or in combination of two or more. [ka] [ka]

[0354] During the ceremony: R F This is equivalent to the above (and in the following formula, R F The group represented by is bonded to the group represented by Rf at its terminal oxygen atom. In each instance, Rf is independently equivalent to the above; R k3Each occurrence independently comprises an alkyl group having 1 to 10 carbon atoms, or OR k7 An alkoxy group represented by , preferably a methyl group or OR k7 It is an alkoxy group represented by, more preferably a methyl group; R k4 Each instance independently comprises a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or OR k7 An alkoxy group represented by , preferably a hydrogen atom, or OR k7 An alkoxy group represented by, more preferably a hydrogen atom; R k5 Each instance independently comprises a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or OR k7 An alkoxy group represented by , preferably a hydrogen atom, or OR k7 An alkoxy group represented by, more preferably a hydrogen atom; R k6 Each instance independently comprises a hydrogen atom, a fluorine atom, or an alkylene group in which one or more hydrogen atoms are substituted with fluorine atoms, preferably a hydrogen atom; R k7 Each instance is independently an alkyl group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 6 carbon atoms; The number of carbon atoms in the alkylene group in which one or more hydrogen atoms are substituted with fluorine atoms is preferably 1 to 8, and more preferably 1 to 6; R k8 is -(O-(CH2) γ5 ) γ6 - is represented by (where the oxygen atom is -(CR k6 2) γ1 (To be bonded to a base represented by...) γ1 is an integer between 1 and 10, preferably 2 or 3, independently in each occurrence; γ2 is an integer between 1 and 50, preferably 10, independently in each occurrence; γ3 is an integer between 1 and 50, preferably between 3 and 5, independently in each occurrence; γ4 is an integer between 1 and 50, preferably between 3 and 5, independently in each occurrence; γ5 is an integer between 1 and 6, preferably between 1 and 3, more preferably 1; γ6 is either 0 or 1.

[0355] The amount of the hydrosilyl compound described above may be an effective amount for curing the carbon-carbon double bond-containing PFPE compound. Preferably, the amount of the hydrosilyl compound is in the range of 0.5 to 5.0 moles, and more preferably in the range of 0.8 to 3.0 moles, of hydrogen atoms (hydrosilyl groups, i.e., SiH groups) bonded to silicon atoms in the hydrosilyl compound per mole of alkenyl groups contained in the carbon-carbon double bond-containing PFPE compound. By including the hydrosilyl compound in the above-described amount, the material constituting the first coating portion 3 can contribute to the formation of the first coating portion 3 having an appropriate degree of crosslinking, and foaming during curing can be reduced.

[0356] (Polysiloxane compounds) Examples of polysiloxane compounds include fluorosilicone, diphenylsiloxane, methylphenylsiloxane, and vinylmethylsiloxane. Since these polysiloxane compounds have even better low-temperature properties than general polydimethylsiloxane, when used in the first coating portion 3, they can exhibit good low-temperature sealing properties.

[0357] The polysiloxane compound only needs to have a specific siloxane unit in its main chain, and its curing system is not particularly limited. For example, it may be a room-temperature curable siloxane that undergoes dehydration condensation via an alkoxy group, or a thermosetting siloxane having an alkenyl group that is cured by a hydrolyl compound and a curing catalyst.

[0358] The above polysiloxane compound may consist of, for example, one of the following polyorganosiloxanes. (a) Formula (I-1):R 6a R 6b Siloxane units represented by SiO, and Formula (I-2):R 6c m61 SiO (4-m61) / 2 Siloxane units shown Polyorganosiloxanes consisting of (b) Formula (II-1):R 6d a61 R 6e b61 (R 6f O) c61 SiO (4-a61-b61-c61) / 2 A molecule having a hydrolyzable group and / or hydroxyl group bonded to at least one silicon atom, and ending in -R 6g -SiR 6h A polyorganosiloxane with an average degree of polymerization of 1,000 to 10,000, consisting of 3-3 encapsulated organopolysiloxanes, where 3-20 mol% of the total siloxane units are represented by formula (II-1), and 0.02-0.5 mol% of the substituents bonded to the silicon atoms are vinyl groups. (c) R at both ends 6r 3SiO 1 / 2 Units and m62 R 6s 2SiO 2 / 2 Units and m63 R 6t R 6u SiO 2 / 2 A polyorganosiloxane containing units, wherein the content of the aromatic hydrocarbon group in the polyorganosiloxane is 3 mol% or more and 16 mol% or less.

[0359] The following describes (a) to (c).

[0360] In this specification, "hydrolyzable group" means a group that can undergo hydrolysis, that is, a group that can be removed from the main skeleton of a compound by hydrolysis. Examples of hydrolyzable groups include -OR, -OCOR, -ON=CR2, -NR2, -NHR, and halogen atoms (wherein R represents a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms), with -OR (i.e., an alkoxy group) being preferred. Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl groups; and substituted alkyl groups such as chloromethyl groups. Among these, alkyl groups, especially unsubstituted alkyl groups, are preferred, and methyl or ethyl groups are more preferred. The hydroxyl group is not particularly limited, but may be a result of hydrolysis of a hydrolyzable group. Examples of halogen atoms include fluorine, chlorine, bromine, and iodine atoms, with chlorine being preferred among these.

[0361] In this specification, "hydrocarbon group" means a group containing carbon and hydrogen, from which one hydrogen atom has been removed from the molecule. Such hydrocarbon groups are not particularly limited, but include hydrocarbon groups having 1 to 20 carbon atoms, which may be substituted with one or more substituents, such as aliphatic hydrocarbon groups and aromatic hydrocarbon groups. The above-mentioned "aliphatic hydrocarbon group" may be linear, branched, or cyclic, and may be saturated or unsaturated. Furthermore, the hydrocarbon group may contain one or more ring structures. Such a hydrocarbon group may also have one or more N, O, S, Si, amide, sulfonyl, siloxane, carbonyl, carbonyloxy, etc., at its terminal or in its molecular chain.

[0362] In the use herein, the substituents of the "hydrocarbon group" are not particularly limited, but include, for example, halogen atoms; C, which may be substituted with one or more halogen atoms. 1-6 Alkyl alkyl group, C 2-6 Alkenyl group, C 2-6 Alkynyl group, C 3-10Cycloalkyl groups, C 3-10 Unsaturated cycloalkyl group, 5-10 membered heterocyclyl group, 5-10 membered unsaturated heterocyclyl group, C 6-10 Examples include one or more groups selected from aryl groups and 5- to 10-membered heteroaryl groups.

[0363] (a) Polyorganosiloxane In equation (I-1), R 6a ha-R 61a X 61a R f61 It is a group represented by R 61a C 1-6 It is an alkylene group, X 61a R is a single bond or a divalent bond group containing at least one selected from the group consisting of O, S, and N. f61 C 1-6 It is a perfluoroalkyl group, for example, C 1-3 It is a perfluoroalkyl group. 6b R is a methyl group. 6a For example, -CH2CH2R f61 That is the case.

[0364] In equation (I-2), R 6c Each of these is independently a monovalent hydrocarbon group or hydrogen atom (for example, alkyl groups such as methyl, ethyl, propyl, and butyl; alkenyl groups such as vinyl and allyl; aryl groups such as phenyl; aralkyl groups such as β-phenylethyl and β-phenylpropyl, etc.), and m61 is 1, 2, or 3.

[0365] Of the total siloxane units, 3 to 100 mol%, preferably 3 to 50 mol%, are represented by the siloxane unit (I-1), and 0 to 5 mol% of the substituents bonded to the silicon atoms are vinyl groups. The average degree of polymerization of the polyorganosiloxane is in the range of 50 to 10,000, for example, in the range of 2,000 to 9,000.

[0366] The polyorganosiloxane of (a) may further contain at least one siloxane unit selected from the group consisting of phenylmethylsiloxane and diphenylsiloxane.

[0367] The polyorganosiloxane in (a) may have multiple vinyl groups. The vinyl groups may be attached to the side chains or to the molecular ends.

[0368] The polyorganosiloxane in (a) may have a hydrolyzable silane. If it has a hydrolyzable silane, the polyorganosiloxane in (a) does not have to contain a vinyl group. It may also contain both a hydrolyzable silane and a vinyl group. Here, a hydrolyzable silane means a group in which a hydrolyzable group is bonded to a Si atom, for example, the above R Si This refers to a group represented by (A1), (A2), (A3), (A4), or (A5), and may be at least one group represented by formula (A1), (A2), (A3), (A4), or (A5).

[0369] (b) Polyorganosiloxane R 6d Each of these is independently an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aromatic group. 6d For example, C 1-12 Preferably C 1-6 This represents an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aromatic group. 6d Examples of these groups include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl, cyclohexyl, octyl, decyl, and dodecyl groups; alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, and isobutenyl groups; and chloromethyl and 3,3,3-trifluoropropyl groups, in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms such as fluorine and chlorine. However, from the viewpoint of ease of synthesis, methyl and 3,3,3-trifluoropropyl groups are preferred.

[0370] R 6eEach of these is independently an unsubstituted or substituted monovalent aromatic hydrocarbon group. 6e For example, C 1-12 Preferably C 1-6 It is an unsubstituted or substituted aromatic monovalent hydrocarbon group. 6e Examples of these groups include aryl groups such as phenyl and tolyl groups; aralkyl groups such as benzyl and phenylethyl groups; and chlorophenyl groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms such as fluorine and chlorine. However, from the viewpoint of ease of synthesis, phenyl groups are preferred.

[0371] R 6f Each of these is independently an unsubstituted or substituted monovalent hydrocarbon group or hydrogen atom that does not contain an aromatic group. Hydrogen group (hydrogen atom), or C 1-10 Preferably C 1-6 This represents an unsubstituted or substituted monovalent hydrocarbon group that does not have an aromatic group. Examples include alkyl groups such as hydrogen, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, hexyl, cyclohexyl, octyl, decyl, and dodecyl groups, alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, and isobutenyl groups, and chloromethyl and 3,3,3-trifluoropropyl groups, in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms such as fluorine and chlorine. From the viewpoint of ease of synthesis, hydrogen or methyl groups are preferred.

[0372] a61 is a number between 1.7 and 2.2, preferably between 1.8 and 2.1; b61 is a number between 0.01 and 0.2, preferably between 0.02 and 0.1; and c61 is a number between 0.0001 and 0.2, preferably between 0.0002 and 0.1. a61 + b61 + c61 ​​is a number satisfying 1.9 to 2.4, preferably between 1.95 and 2.05. However, the oxygen atom (O) connecting the silicon atom at the end of the molecular chain and the silicon atom adjacent to it is a divalent bond group -R 6g It may be replaced with -.

[0373] The end of the above organopolysiloxane is -R 6g -SiR 6h 3. It may have at least one of a hydrolyzable silane (for example, a group in which a hydrolyzable group is bonded to a -Si atom), a vinyl group, and an alkenyl group. Here, R 6g is an oxygen atom or C 1-5 It is an alkylene group, R 6h Each of them is independent of R 6d , R 6e or R 6f That is the case.

[0374] The molecular structure of organopolysiloxanes is not particularly limited and is linear; part of the molecular chain contains R 6d SiO 3 / 2 Unit, R 6e SiO 3 / 2 Units, SiO2 units (in the formula, R 6d and R 6e The group represented by is as defined above. It may be branched; cyclic; or three-dimensional network (resinous), including ), but is usually a linear diorganopolysiloxane in which the main chain basically consists of repeating diorganosiloxane units and both ends of the molecular chain are sealed with diorgano(hydroxy)siloxy groups and / or diorgano(organoxy)siloxy groups.

[0375] The viscosity (at 25°C) of the organopolysiloxane is preferably 100 to 1,000,000 mPa·s, and more preferably 1,000 to 500,000 mPa·s. When the viscosity is between 100 and 1,000,000 mPa·s, the resulting cured silicone rubber has superior strength, fluidity, and workability. The viscosity can be measured using a rotational viscometer (e.g., BL type, BH type, BS type, cone plate type, rheometer, etc.). Furthermore, when the organopolysiloxane is linear, the degree of polymerization of the organopolysiloxane that gives the viscosity range described above (i.e., the number of repeating diorganosiloxane units constituting the main chain) corresponds to, for example, 100 to 2,000, preferably 200 to 1,500, and more preferably 300 to 1,300. The degree of polymerization or molecular weight can be determined, for example, by the number-average degree of polymerization (or number-average molecular weight) in polystyrene terms in gel permeation chromatography (GPC) analysis using toluene or the like as the developing solvent. It is possible.

[0376] (c) Polyorganosiloxane Polyorganosiloxanes have R at both ends. 6r 3SiO 1 / 2 The unit (also called the "M unit") and m62 R 6s 2SiO 2 / 2 It contains a unit (also called the "first D unit") (where m62 is an integer greater than or equal to 1). Such polyorganosiloxanes are represented by the following general formula (III-1). (R 6r 3SiO 1 / 2 )2(R 6s 2SiO 2 / 2 ) m62 ...General formula (III-1) (R 6r Each of them is independent of C 1-12 The unsubstituted or substituted aliphatic hydrocarbon group is R 6s Each of them is independent of C 1-12 Unsubstituted or substituted aliphatic hydrocarbon groups, or C 6-10 The polyorganosiloxane is an unsubstituted or substituted aromatic hydrocarbon group, and the polyorganosiloxane contains at least one alkenyl group directly bonded to a silicon atom (Si atom) in one molecule. (Contains 2) Also, from the viewpoint of improving the flexibility of the silicone adhesive composition, polyorgana In the nosiloxane structure, RSiO 3 / 2 Units (T units) and SiO 4 / 2 It is preferable that the unit (Q unit) is not included.

[0377] The above polyorganosiloxane more preferably further comprises m63 R 6t R 6u SiO 2 / 2 It contains a unit (hereinafter also referred to as the "second D unit") (where m63 is an integer greater than or equal to 1). Such a polyorganosiloxane is represented by the following general formula (III-2). (R 6r SiO 1 / 2 )2(R 6s SiO 2 / 2 ) m62 (R 6t R 6u SiO 2 / 2 ) m63 ...General formula (III-2) (R 6s Each of them is independent of C 1-12 The unsubstituted or substituted aliphatic hydrocarbon group is R 6t is C 1-12 Unsubstituted or substituted aliphatic hydrocarbon groups, or C 6-10 The unsubstituted or substituted aromatic hydrocarbon group is R 6u is C 6-10 (These are unsubstituted or substituted aromatic hydrocarbon groups.)

[0378] In equations (III-1) and (III-2), R 6r and R 6s Each of them is independent of C 1-12 an unsubstituted or substituted aliphatic hydrocarbon group, for example, C 2-8 The alkenyl group of, or C 1-12 It is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond. 2-8 Examples of alkenyl groups include vinyl, allyl, propenyl, isopropenyl, butenyl, pentenyl, hexenyl, and cyclohexenyl groups. 1-12Examples of unsubstituted or substituted monovalent hydrocarbon groups that do not contain aliphatic unsaturated bonds include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, and dodecyl groups; cycloalkyl groups such as cyclopentyl, cyclohexyl, and cycloheptyl groups; aryl groups such as phenyl, tolyl, xylyl, naphthyl, and biphenylyl groups; aralkyl groups such as benzyl, phenylethyl, phenylpropyl, and methylbenzyl groups; and groups in which at least one hydrogen atom bonded to the carbon atom of these groups is substituted with a halogen atom such as fluorine, chlorine, or bromine, or a cyano group.

[0379] In the M units of the above general formulas (III-1) and (III-2), the R included in the M unit 6r At least one of the is more preferably C 2-8 The C is an alkenyl group, and more preferably contains a vinyl group, an allyl group, a propenyl group, an isopropenyl group, and a butenyl group. 2-4 It is a lower alkenyl group, and is particularly preferably a vinyl group. In the M units of the above general formulas (III-1) and (III-2), the R contained in the M unit 6r The remaining two of them are, more preferably, independent of each other, C 1-12 The C is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond, and more preferably contains a methyl group, an ethyl group, a propyl group, and an isopropyl group. 1-3 It is a lower alkyl group, and is particularly preferably a methyl group. That is, in the M units of the above general formulas (III-1) and (III-2), the R contained in the M unit 6r One of them is a vinyl group, R 6r The remaining two of these are preferably methyl groups. The polyorganosiloxane represented by the above general formula (III-1) is particularly preferably a vinyl-terminated polydimethylsiloxane.

[0380] In equation (III-2), R 6tis more, C 1-12 an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond, or C 6-10 It is an unsubstituted or substituted monovalent aromatic hydrocarbon group. 1-12 As for the unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond, R in the above general formula (III-2) is 6r and R 6s The same examples given can be used as illustrations. C 6-10 Examples of unsubstituted or substituted monovalent aromatic hydrocarbon groups include aryl groups such as phenyl, tolyl, xyl, and naphthyl groups; aralkyl groups such as benzyl, 2-phenylethyl, and 2-phenylpropyl groups; and groups in which at least one hydrogen atom bonded to the carbon atom of these groups is substituted with a halogen atom such as fluorine, chlorine, or bromine, or a cyano group. In the above general formula (III-2), R 6t More preferably, the aryl group is a phenyl group, a tolyl group, a xylyl group, or a naphthyl group, and particularly preferably a phenyl group.

[0381] In the above general formula (III-2), R 6u is more, C 6-10 It is an unsubstituted or substituted monovalent aromatic hydrocarbon group. 6-10 The unsubstituted or substituted monovalent aromatic hydrocarbon group is R in the above general formula (III-2). 6t The same example as the one given can be used as an example. In the above general formula (III-2), R 6u R is more preferably an aryl group containing a phenyl group, a tolyl group, a xylyl group, or a naphthyl group, and is particularly preferably a phenyl group. In the above general formula (III-2), 6t and R 6u Preferably, the substituents are the same. As the polyorganosiloxane represented by the general formula (III-2) above, a vinyl-terminated diphenylsiloxane-dimethylsiloxane copolymer is particularly preferred.

[0382] The content of the aromatic hydrocarbon group in the polyorganosiloxane represented by the above general formula (III-2) is 3 mol% or more and 16 mol% or less. More preferably, the content of the aromatic hydrocarbon group in the above polyorganosiloxane is 4 mol% or more and 14 mol% or less, and even more preferably 5 mol% or more and 12 mol% or less.

[0383] m62 is an integer greater than or equal to 1, and m63 is an integer greater than or equal to 1.

[0384] The above polyorganosiloxane preferably consists of a single type of polyorganosiloxane. "Consists of a single type of polyorganosiloxane" means that all polyorganosiloxanes constituting the silicone adhesive composition are R in the above general formulas (III-1) and (III-2). 6r ,R 6s ,R 6t ,R 6u This means that each substituent has a uniquely defined molecular structure, 6r ,R 6s ,R 6t ,R 6u This means that it is not a mixture of polyorganosiloxanes having different molecular structures from all or any of the substituents.

[0385] In one embodiment, the silicone compound is (a) formula (I-1):R 6a R 6b Siloxane units represented by SiO, and formula (I-2):R 6c m61 SiO (4-m61) / 2 It consists of a composition comprising a polyorganosiloxane composed of siloxane units represented by .

[0386] In one embodiment, the silicone compound is (b) formula (II-1):R 6d a61 R 6e b61 (R 6f O) c61 SiO (4-a61-b61-c61) / 2A molecule having a hydrolyzable group and / or hydroxyl group bonded to at least one silicon atom, and ending in -R 6g -SiR 6h The composition is formed from polyorganosiloxanes with an average degree of polymerization of 1,000 to 10,000, consisting of 3-3 encapsulated organopolysiloxanes, in which 3 to 20 mol% of the total siloxane units are represented by formula (II-1), and 0.02 to 0.5 mol% of the substituents bonded to the silicon atoms are vinyl groups.

[0387] In one embodiment, the silicone compound (c) has R at both ends 6r 3SiO 1 / 2 Units and m62 R 6s 2SiO 2 / 2 Units and m63 R 6t R 6u SiO 2 / 2 The composition is formed from a polyorganosiloxane containing units, wherein the content of the aromatic hydrocarbon groups in the polyorganosiloxane is 3 mol% or more and 16 mol% or less.

[0388] In one embodiment, the first coating portion 3 is formed from a composition containing a PFPE group-containing silane compound.

[0389] In one embodiment, the first coating portion 3 is formed from a composition comprising a carbon-carbon double bond-containing PFPE compound and a hydrosilyl compound.

[0390] In one embodiment, the first coating portion 3 is formed from a composition containing a polysiloxane compound.

[0391] The sealing material 1 may further have other components such as an adhesive layer and a second covering portion.

[0392] The adhesive layer is located between the core 2 and the first covering 3, and adheres the core 2 and the first covering 3 together. This improves the adhesive strength between the core 2 and the first covering 3.

[0393] For the adhesive layer, silane coupling agents such as aminopropyltrimethoxysilane, glycidylpropyltrimethoxysilane, and acroylpropyltrimethoxysilane can be used.

[0394] The average thickness of the adhesive layer is, for example, in the range of 0.1 to 100 μm. The average thickness of the adhesive layer is the value obtained by measuring the thickness distance of the adhesive layer at three points using a microscope during cross-sectional observation of the sealant 1, and averaging the measured values.

[0395] The second covering portion is located at least on the first covering portion 3. By providing the second covering portion, the first covering portion 3 can be protected. However, the second covering portion does not have to cover the entire first covering portion 3. That is, a part of the first covering portion 3 may be exposed.

[0396] The second covering portion may be provided on the inner and outer circumferential surfaces of the core portion 2. By providing the second covering portion, the core portion 2 can be protected.

[0397] As the second coating, for example, resins such as perfluoroalkoxyalkanes (PFA), PTFE, polyethylene terephthalate (PET), fluororubber, particularly perfluororubber, specifically different types of rubber such as tetrafluoroethylene-perfluorovinyl ether compounds (FFKM) and tetrafluoroethylene-propylene compounds (FEPM) can be used. For example, the above-mentioned fluororubbers can be used. The average thickness of the second coating is, for example, in the range of 0.1 to 2 mm. The average thickness of the second coating refers to the average value obtained by measuring the thickness distance of the second coating at three points using a microscope during cross-sectional observation of the sealant 1.

[0398] [Method for manufacturing sealant 1] A method for manufacturing the seal material 1 of the first embodiment will be described below. Manufacturing methods 1 and 2 are described below, but the contents of this disclosure are not limited to the following description. Furthermore, the modified versions can also be formed by similar methods.

[0399] (Manufacturing method 1) The method for manufacturing the sealing material 1 includes the following step A1. Process A1: A coating step of applying a composition containing the material constituting the first coating portion 3 onto the core portion 2.

[0400] Application can be performed using, for example, an air dispenser, needle dispenser, jet dispenser, etc.

[0401] As the material constituting the first coating portion 3, at least one of the group consisting of the PFPE group-containing silane compounds, carbon-carbon double bond-containing PFPE compounds and hydrosilyl compounds, and polysiloxane compounds can be used, and these compounds can be used as a composition. They are described in detail below.

[0402] • PFPE group-containing silane compounds PFPE group-containing silane compounds can be used as fillers, crosslinking agents, catalysts, and / or compositions containing PFPE group-containing silane compounds of other structures.

[0403] As fillers, silica-based fillers such as crushed silica, aerosolized silica (dry silica), wet silica (sedimented silica), and crystalline silica (quartz powder) can be used, as well as engineering plastics such as aluminum hydroxide, alumina, boehmite, aluminum fluoride, aluminum nitride, magnesium hydroxide, magnesium oxide, calcium hydroxide, calcium carbonate, zinc carbonate, basic zinc carbonate, zinc oxide, titanium oxide, yttrium oxide, carbon black, carbon fluoride, PTFE, imide-based fillers having an imide structure, polyphenylene sulfide, polyether ketone, and polyoxybenzoate can be used, and the fillers may be hydrophobized with a surface treatment agent as needed. Fillers may also be surface-treated and hydrophobized as needed.

[0404] The crosslinking agent is not particularly limited as long as it is a compound having a portion capable of crosslinking (condensation reaction) with a PFPE group-containing silane compound (specifically, a silane portion of a PFPE group-containing silane compound having a hydroxyl group or a hydrolyzable group bonded to a Si atom). By including a PFPE group-containing silane compound and a crosslinking agent, the physical properties (e.g., tensile strength or elastic modulus) of the first coating portion 3 can be improved.

[0405] The above crosslinking agent is -OR bonded to Si atoms. g3 It is an organosilicon compound having at least two of the following: In the formula, R g3 Each instance independently represents either a hydrogen atom or a monovalent organic group. A monovalent organic group means a group containing a carbon atom. Such a monovalent organic group is not particularly limited, but could be a group obtained by removing one more hydrogen atom from a hydrocarbon group. A hydrocarbon group is synonymous with the above.

[0406] The above crosslinking agent has a structure different from that of PFPE group-containing silane compounds.

[0407] The above crosslinking agent is: ·R g3 Organic compounds in which the atom is a hydrogen atom, that is, organosilicon compounds having at least two silanol groups in one molecule, Examples include organosilicon compounds represented by formulas (E3) to (E5) described later.

[0408] Organosilicon compounds having at least two silanol groups in one molecule: In the above organosilicon compound, it is preferable that the silanol group is present at both ends of the molecular backbone. Here, the molecular backbone refers to the relatively longest bonding chain in the molecule of the organosilicon compound.

[0409] Examples of compounds having silanol groups at both ends of the above molecular main chain include the compound represented by the following formula (E1).

[0410] [ka]

[0411] R g1 Each instance is independently a substituted or unsubstituted monovalent hydrocarbon group having 1 to 8 carbon atoms. g1 Specifically, examples include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, and decyl groups; cycloalkyl groups such as cyclopentyl, cyclohexyl, and cycloheptyl groups; alkenyl groups such as vinyl, allyl, propenyl, isopropenyl, butenyl, isobutenyl, hexenyl, and cyclohexenyl groups; aryl groups such as phenyl, tolyl, xylyl, and naphthyl groups; aralkyl groups such as benzyl, phenylethyl, and phenylpropyl groups; and groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms (for example, chloromethyl, bromoethyl, chloropropyl, trifluoropropyl, and nonafluorohexyl groups).

[0412] Each of the ε1s is an independent integer greater than or equal to 1. Preferably, ε1 is 2 or greater, more preferably 5 or greater, more preferably 50 or less, and more preferably 20 or less.

[0413] The organosilicon compound having at least two silanol groups in one molecule (specifically, the compound represented by formula (E1)) preferably does not have a PFPE structure in its molecular structure.

[0414] Organosilicon compounds represented by formulas (E3), (E4), or (E5):

[0415] [ka]

[0416] In the above formulas (E3) and (E4), R g3 This is equivalent to the above. The above R g3This is a portion of the PFPE group-containing silane compound that can react with a portion having a hydroxyl group or a hydrolyzable group bonded to a Si atom.

[0417] The above R g3 It is preferable that it is a monovalent organic group.

[0418] The above R g3 - More preferably, in each occurrence, independently, CH3-, C2H5-, C3H7-, CF3CH2-, CH3CO-, CH2=C(CH3)-, CH3CH2C(CH3)=N-, (CH3)2N-, (C2H5)2N-, CH2=C(OC2H5)-, (CH3)2C=C(OC8H 17 )-, or [ka] That is the case.

[0419] In the above formulas (E3) and (E4), R g4 Each instance is independently a monovalent organic group. g4 It is preferably a substituted or unsubstituted monovalent hydrocarbon group, and more preferably a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms. g4 Specifically, these include alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, and decyl groups; cycloalkyl groups such as cyclopentyl, cyclohexyl, and cycloheptyl groups; aryl groups such as phenyl, tolyl, xylyl, and naphthyl groups; aralkyl groups such as benzyl, phenylethyl, and phenylpropyl groups; alkenyl groups such as vinyl, allyl, propenyl, and butenyl groups; and groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms such as fluorine, chlorine, and bromine (for example, chloromethyl, bromoethyl, chloropropyl, trifluoropropyl, 3,3,4,4,5,5,6,6,6-nonafluorohexyl, etc.).

[0420] In one embodiment, R g4 This can be a group represented by the following general formula. Rf 1 -R g5 - In the above formula, Rf 1 This is a monovalent fluorinated (poly)ether group. The above Rf 1 As for -R, F Examples include structures in which CF3O-, CF3CF2O-, CF3CF2CF2O-, (CF3)2CFO-, or CF3CF2CF2CF2O- are bonded to the CF2 terminus.

[0421] The above R g5 This is a divalent organic group. The term "divalent organic group" is synonymous with the above.

[0422] The above R g5 This can be a substituted or unsubstituted divalent hydrocarbon group that may contain, for example, one or more of oxygen, nitrogen, silicon, and sulfur atoms, and may contain an amide bond or a sulfonamide bond. The divalent hydrocarbon group preferably has 2 to 20 carbon atoms. Here, specific examples of substituted or unsubstituted divalent hydrocarbon groups that do not contain oxygen, nitrogen, silicon, or sulfur atoms and do not contain an amide bond or a sulfonamide bond include alkylene groups such as ethylene, propylene, methylethylene, butylene, and hexamethylene; cycloalkylene groups such as cyclohexylene; arylene groups such as phenylene, torylene, xylylene, naphthylene, and biphenylene; combinations of these alkylene and arylene groups; and groups in which some or all of the hydrogen atoms of these alkylene and arylene groups are substituted with halogen atoms.

[0423] In the above divalent hydrocarbon group, the oxygen atom is represented as -O- and the nitrogen atom as -NR g51 -(R g51 (where is a hydrogen atom or an alkyl or aryl group having 1 to 10 carbon atoms) or N=, and the silicon atom is -SiR g52 R g53 -(R g52 , and Rg53 In each occurrence, the atoms may be independently included as alkyl or aryl groups having 1 to 10 carbon atoms, and the sulfur atom may be included as -S-. Furthermore, in the above divalent hydrocarbon group, the amide bond is -C(=O)NR g51 -(R g51 (As above) and the sulfonamide bond is -SO2NR g51 -(R g51 (The above is the same as above) and may be included. Specific examples of such divalent hydrocarbon groups are listed below. In the following formulas, Me represents a methyl group, Ph represents a phenyl group, and in each of the following formulas, Rf is on the left side. 1 The groups bond together.

[0424] [ka] [* indicates a binding site.]

[0425] In equations (E3) and (E4) above, ε2 is independently 2 or 3 in each occurrence, and ε3 is independently 2 or 3 in each occurrence.

[0426] In the above formula (E5), R g3 , and R g4 This is equivalent to the above. In the above formula (E5), R g6 - is independent in each occurrence, R g8 -R g7 - represents

[0427] The above R g7 Each instance independently represents a single bond, an oxygen atom, or a divalent organic group. The divalent organic groups are as described above.

[0428] The above R g7 Preferably, this is an alkylene group having 1 to 10 carbon atoms, or a group having 1 to 10 carbon atoms and containing a nitrogen atom or an oxygen atom in the main chain.

[0429] The above R g7 more, Alkylene groups with 1 to 3 carbon atoms, CH2CH2-NH-CH2CH2CH2, or It is CH2-O-CH2CH2CH2.

[0430] The above R g8 R is a reactive functional group. g8 Preferably, in each occurrence, it is independently an amino group, an epoxy group, a methacrylic group, a vinyl group, or a mercapto group, and more preferably an amino group.

[0431] In the above formula (E5), ε4 is an integer of 2 or more, preferably 2 or 3, more preferably 3. In the above formula (E5), ε5 is an integer of 0 or more, preferably 0 or 1. In the above formula (E5), ε6 is 1 or 2, preferably 1. However, the sum of ε4, ε5 and ε6 is 4.

[0432] In the above formula (E5), preferably ε4 is 2 or 3, ε5 is 0 or 1, and ε6 is 1 or 2, more preferably ε4 is 3, ε5 is 0, and ε6 is 1.

[0433] Preferably, the crosslinking agent is a compound represented by formula (E3) or formula (E5), and more preferably a compound represented by formula (E3).

[0434] In one embodiment, the crosslinking agent does not have a group represented by PFPE in its molecular chain.

[0435] In one embodiment, the molecular weight of the crosslinking agent is 1,000 or less, preferably 600 or less, and more preferably 250 or less. The lower limit of the molecular weight of the crosslinking agent may be 50 or more, or 100 or more.

[0436] In a preferred embodiment, the crosslinking agent is at least one selected from the group consisting of tetraethoxysilane, tetramethoxysilane, methyltriethoxysilane, methyltrimethoxysilane, dimethyldimethoxysilane, trimethylmethoxysilane, trimethylethoxysilane, aminopropyltriethoxysilane, aminopropyltrimethoxysilane, tridecafluoro-n-octyltriethoxysilane, and tridecafluoro-n-octyltrimethoxysilane.

[0437] The above crosslinking agents may be used individually or two or more simultaneously.

[0438] The above crosslinking agent may be present in an amount of, for example, 0.1 parts by mass or more, specifically 0.3 parts by mass or more, 30 parts by mass or less, and specifically 10 parts by mass or less, per 100 parts by mass of the PFPE group-containing silane compound.

[0439] The above crosslinking agent can be present in an amount of, for example, 0.1 to 30 parts by mass, more specifically 0.3 to 10 parts by mass, and more specifically 0.3 to 5.0 parts by mass, per 100 parts by mass of the PFPE group-containing silane compound.

[0440] The above crosslinking agent contains, for example, -OH or -OR groups, per mole of a hydroxyl group or hydrolyzable group bonded to the Si atom of the PFPE group-containing silane compound, a hydroxyl group or hydrolyzable group, bonded to the Si atom of the PFPE group-containing silane compound. g3 It can contain 1 mole or more, specifically 2 moles or more. The above crosslinking agent contains -OH or -OR for every 1 mole of a hydroxyl group or hydrolyzable group bonded to the Si atom of the PFPE group-containing silane compound. g3 For example, it can contain 30 moles or less, more specifically, 20 moles or less, and more specifically, 10 moles or less. g3 This is synonymous with the above.

[0441] The above crosslinking agent contains -OH or -OR groups per mole of a hydroxyl group or hydrolyzable group bonded to the Si atom of the PFPE group-containing silane compound. g3This can include, for example, a range of 1 to 30 moles, and more specifically, a range of 2 to 20 moles.

[0442] The above-mentioned crosslinking agent may be included in an amount of, for example, 0.1 to 30 parts by mass per 100 parts by mass of the curable composition of the present invention, and more specifically, in an amount of 0.3 to 10 parts by mass.

[0443] The catalyst promotes the hydrolysis condensation between the PFPE group-containing silane compound and the crosslinking agent.

[0444] Examples of catalysts that can be used include metal catalysts, organic acid catalysts, inorganic acid catalysts, and basic catalysts (e.g., ammonia, triethylamine, diethylamine, etc.).

[0445] Examples of metal atoms included in the above-mentioned metal catalyst include titanium, zirconium, and tin. Among these metal atoms, titanium or zirconium is preferred.

[0446] As for the above metal-based catalysts, the ligand is an alkoxide (-OR h It is preferable to use a compound having ).

[0447] Specific examples of metal catalysts include tetra-n-butyl titanate, tetraisopropyl titanate, titanium diisopropoxy-bis(ethyl acetate), tetra-n-butyl zirconate, tetra-n-propyl zirconate, dibutyltin dimethoxide, and dibutyltin dilaurate, with tetraisopropyl titanate and tetra-n-propyl zirconate being preferred.

[0448] In the above metal catalyst, the above R h A alkyl group having 1 to 4 carbon atoms is preferred as the catalyst. Using such a catalyst further promotes the condensation reaction.

[0449] In the above metal catalyst, the above R hAs such, alkyl groups having 1 to 3 carbon atoms are more preferred. When a catalyst having such alkyl groups is used, the condensation reaction is particularly promoted. The catalyst is easily dissolved or dispersed in the curable composition and can contribute to promoting a uniform reaction. The catalyst has fewer impurities and can contribute to the formation of a cured product of a transparent curable composition.

[0450] Examples of the above-mentioned organic acid catalysts include compounds having carboxylic acids, sulfonic acids, and phosphoric acids. Specifically, examples include acetic acid, trifluoroacetic acid, methanesulfonic acid, toluenesulfonic acid, and alkyl phosphoric acid.

[0451] Examples of the inorganic acid catalysts mentioned above include hydrochloric acid and sulfuric acid.

[0452] The above catalyst is preferably present in an amount of 0.1 to 5.0 parts by mass, and more preferably in an amount of 0.1 to 3.0 parts by mass, per 100 parts by mass of the PFPE group-containing silane compound.

[0453] The above catalyst may be used individually or two or more simultaneously.

[0454] A PFPE group-containing silane compound represented by a different structural formula is, for example, PFPE group-containing silane compound (A'): [ka] It is represented as follows.

[0455] In equation (A'), any parts that overlap with the description of equation (A) are omitted.

[0456] R F2 Rf 1 -R F -O q - is Rf 1 C may be substituted with one or more fluorine atoms. 1-16 It is an alkyl group. 1-16The alkyl group may be linear or branched, preferably linear or branched C 1-6 Alkyl groups, especially linear or branched C groups. 1-3 It is an alkyl group, more preferably a linear C 1-6 Alkyl groups, especially linear C 1-3 It is an alkyl group.

[0457] The above Rf 1 Preferably, C is substituted with one or more fluorine atoms. 1-16 It is an alkyl group, more preferably C 1-16 It is a perfluoroalkyl group. 1-16 The perfluoroalkyl group may be linear or branched, preferably linear or branched C 1-6 Perfluoroalkyl groups, especially linear or branched C13C 1-3 A perfluoroalkyl group, more preferably a linear C 1-6 Perfluoroalkyl groups, especially linear C 1-3 It is a perfluoroalkyl group.

[0458] In one embodiment, Rf 1 C may be substituted with one or more fluorine atoms. 1-6 It is an alkyl group. 1-6 The alkyl group may be linear or branched, preferably linear or branched C 1-3 It is an alkyl group.

[0459] One embodiment is the above C 1-6 Alkyl groups are straight-chain carbon atoms. 1-6 It is an alkyl group, preferably C 1-3 It is an alkyl group. Rf 1 In one embodiment, it is CF3-; in another embodiment, it is CF3CF2-; and in yet another embodiment, it is CF3CF2CF2-.

[0460] In the above embodiment, Rf 1 Preferably, C is substituted with one or more fluorine atoms.1-6 It is an alkyl group, more preferably C 1-6 It is a perfluoroalkyl group. In this embodiment, the above C 1-6 The perfluoroalkyl group may be linear or branched, and preferably a linear C group. 1-6 Perfluoroalkyl groups, especially linear C 1-3 It is a perfluoroalkyl group.

[0461] α1' is an integer from 1 to 9. These α1 and α1' are X A It can change depending on the valence of α1. The sum of α1 and α1' is X A It is the same as the valence of X. For example, X A If is a 10-valent organic group, the sum of α1 and α1' is 10, and for example, α1 can be 9 and α1' can be 1, α1 can be 5 and α1' can be 5, or α1 can be 1 and α1' can be 9. Also, X A If it is a divalent organic group, then α1 and α1' are 1.

[0462] If necessary, the PFPE group-containing silane compound may be diluted with a solvent. The solvent can be any solvent capable of dissolving, suspending, or dispersing the material constituting the first coating 3. The solvent can be dissolved in a suitable fluorine-based solvent at a desired concentration. The concentration of the fluorine-based solvent may be, for example, 50 parts by mass or less, or 10 parts by mass or less, per 100 parts by mass of the material constituting the first coating 3. The viscosity of the composition can be adjusted by using a mixture containing the material constituting the first coating 3 and the solvent. Using it with a solvent can improve the handling properties of the composition. Furthermore, it may be easier to control the shape of the cured product (first coating 3) formed from the material constituting the first coating 3, for example, the fluidity of the composition may increase, allowing for an increase in the coating speed. In addition, the ability to extrude and coat the composition with less pressure may facilitate air dispenser and jet dispenser processing, increasing the degree of freedom in the processing steps.

[0463] Suitable solvents include perfluorohexane, CF3CF2CHCl2, CF3CH2CF2CH3, CF3CHFCHFC2F5, 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, 1,1,2,2,3,3,4-heptafluorocyclopentane ((Zeolora H (trade name), etc.)), C4F9OCH3, C4F9OC2H5, CF3CH2OCF2CHF2, C6F 13 CH=CH2, xylene hexafluoride, perfluorobenzene, methylpentadecafluoroheptyl ketone, trifluoroethanol, pentafluoropropanol, hexafluoroisopropanol, HCF2CF2CH2OH, methyltrifluoromethanesulfonate, trifluoroacetic acid, and CF3O (CF2CF2O) s3 (CF2O) s4 CF2CF3[In the formula, s3 and s4 are independent integers between 0 and 1000, and the order of existence of each repeating unit enclosed in parentheses with s3 or s4 is arbitrary in the formula, provided that the sum of s3 and s4 is 1 or greater. Fluorine-based solvents selected from the group consisting of 1,1-dichloro-2,3,3,3-tetrafluoro-1-propene, 1,2-dichloro-1,3,3,3-tetrafluoro-1-propene, 1,2-dichloro-3,3,3-trifluoro-1-propene, 1,1,2-trichloro-3,3,3-trifluoro-1-propene, 1,1,2-trichloro-3,3,3-trifluoro-1-propene, 1,1,1,4,4,4-hexafluoro-2-butene, 1,3-bis(trifluoromethyl)benzene, Fluorinert (manufactured by 3M), perfluorobutyl methyl ether, and perfluorobutyl ethyl ether can also be used.

[0464] Furthermore, before applying the first coating portion 3 onto the core portion 2, various primer layers may be formed on the core portion 2.

[0465] In one embodiment, the composition may be further diluted with a solvent depending on its use and purpose. As the solvent used for dilution, the fluorine-type agents exemplified above can be used. For example, it may be dissolved in 1,3-bis(trifluoromethyl)benzene, Fluorinert (manufactured by 3M), perfluorobutyl methyl ether, perfluorobutyl ethyl ether, etc., at a desired concentration. In particular, the use of the above solvents is preferred for thin-film coating applications.

[0466] • Carbon-carbon double bond-containing PFPE compounds and hydrosilyl compounds Carbon-carbon double bond-containing PFPE compounds and hydrosilyl compounds can be used as fillers, catalysts, organosilicon compounds, hydrolysis catalysts, additives, and / or compositions containing carbon-carbon double bond-containing PFPE compounds of other structures.

[0467] As fillers, those described in the section on PFPE group-containing silane compounds can be used.

[0468] The catalyst can be one that can act as a hydrosilylation catalyst. The hydrosilylation catalyst promotes the addition reaction between the alkenyl group in the carbon-carbon double bond-containing PFPE compound and the hydrogen atom (hydrosilyl group) bonded to the silicon atom in the hydrosilyl compound.

[0469] It is preferable to use a transition metal catalyst as the catalyst described above. The transition metal included in the catalyst is preferably at least one selected from the group consisting of platinum, rhodium, ruthenium, iridium, and palladium.

[0470] As the catalyst, it is preferable to use platinum or a platinum compound. Such catalysts are advantageous in terms of reducing catalyst cost and ease of availability.

[0471] Examples of the platinum compounds mentioned above include chloroplatinic acid or complexes of chloroplatinic acid with olefins such as ethylene, complexes with alcohols or vinylsiloxanes, and metallic platinum supported on silica, alumina, carbon, etc.

[0472] Examples of catalysts containing rhodium, ruthenium, iridium, and palladium include RhCl(PPh3)3, RhCl(CO)(PPh3)2, and Ru3(CO). 12 Examples include IrCl(CO)(PPh3)2 and Pd(PPh3)4. Note that Ph represents the phenyl group.

[0473] The catalyst described above can be used in solid form when it is a solid, but in order to obtain a more uniform first coating portion 3, it is preferable to dissolve chloroplatinic acid or a complex in a suitable solvent and use it in a way that makes it compatible with the carbon-carbon double bond-containing PFPE compound.

[0474] The catalyst should be present in an effective amount that can contribute to the reaction, for example, an effective amount that can contribute to the reaction as a hydrosilylation reaction catalyst. The amount of the catalyst can be appropriately increased or decreased depending on the desired curing rate. The catalyst is usually preferably present in an amount of 0.1 to 500 ppm by mass (in terms of metal atoms) relative to the carbon-carbon double bond-containing PFPE compound.

[0475] Organosilicon compounds have one or more hydrolyzable groups bonded to silicon atoms in each molecule. Organosilicon compounds can function as adhesion promoters that can impart self-adhesion to compositions.

[0476] The above organosilicon compounds may be used individually or in combination of two or more.

[0477] The above organosilicon compound may have one or more monovalent perfluoroalkyl groups or monovalent perfluorooxyalkyl groups. Having such a structure can result in particularly good compatibility and dispersibility between the organosilicon compound and the carbon-carbon double bond-containing PFPE compound, and enable the formation of a suitable cured product (first coating portion 3).

[0478] The above organosilicon compounds may have one or more hydrogen atoms directly bonded to a silicon atom in each molecule, from the viewpoint of addition reactivity with carbon-carbon double bond-containing PFPE compounds.

[0479] As the organosilicon compound mentioned above, organosiloxanes or trialkoxysilanes having one or more alkoxysilyl groups bonded to a silicon atom via a carbon atom or a carbon atom and an oxygen atom are preferred.

[0480] In the organosilicon compounds described above, the siloxane skeleton of the organosiloxane may be cyclic, linear, branched, or a combination thereof. The organosiloxane can be one represented by the following general formula.

[0481] [ka]

[0482] In the above general formula, each j1 is preferably an integer between 0 and 50, and more preferably an integer between 0 and 20. In the above general formula, each j2 is preferably an integer between 0 and 50, and more preferably an integer between 0 and 20, independently in each occurrence. In the above general formula, each j3 is preferably an integer between 1 and 50, and more preferably an integer between 1 and 20, independently in each occurrence. In the above general formula, each j4 is preferably an integer between 0 and 50, and more preferably an integer between 0 and 20, independently in each occurrence. In the above general formula, each j5 is preferably an integer between 0 and 50, and more preferably an integer between 0 and 20, independently in each occurrence. The sum of j1, j2, j3, j4, and j5 is an integer that satisfies a polystyrene-based weight-average molecular weight of 500 to 20,000 determined by gel permeation chromatography (GPC).

[0483] In the above general formula, R j1 Each of these is independently a halogen-substituted or unsubstituted monovalent hydrocarbon group.j1 The number of carbon atoms in the halogen-substituted or unsubstituted monovalent hydrocarbon group is preferably in the range of 1 to 10, and more preferably in the range of 1 to 8. Specific examples of such monovalent hydrocarbon groups include alkyl groups such as methyl, ethyl, propyl, butyl, hexyl, cyclohexyl, and octyl groups; aryl groups such as phenyl and tolyl groups; aralkyl groups such as benzyl and phenylethyl groups; or substituted monovalent hydrocarbon groups in which some or all of the hydrogen atoms of these groups are substituted with halogen atoms such as fluorine atoms. Among these, the monovalent hydrocarbon group is more preferably a methyl group.

[0484] In the above general formula, R j2 This represents an alkoxysilyl group bonded to a silicon atom via a carbon atom or a carbon atom and an oxygen atom, specifically, -R j5 -Si(OR j6 )3, or a base represented by the following formula can be given. [ka]

[0485] In the above formula, R j5 R is a divalent hydrocarbon group having 1 to 10 carbon atoms, particularly 1 to 4 carbon atoms, specifically an alkylene group such as a methylene group, ethylene group, propylene group, butylene group, hexylene group, cyclohexylene group, or octylene group, and j6 These are monovalent hydrocarbon groups having 1 to 8 carbon atoms, particularly 1 to 4 carbon atoms, specifically alkyl groups such as methyl, ethyl, and n-propyl groups. j7 R is a monovalent hydrocarbon group having 1 to 8 carbon atoms, particularly 1 to 4 carbon atoms, specifically alkyl groups such as methyl, ethyl, and n-propyl groups. j8 k is a hydrogen atom or a methyl group, and k is an integer between 2 and 10.

[0486] In the above general formula, R j3 The general formula is as follows: -Z j1 -Rf j1 It is a base represented by . Note that Z j1 The right side is Rf j1 Combine. [In the formula, Z j1 is, -(CH2) j6 -, or (CH2) j7 -X j1 -(in the formula, X j1 is -OCH2-, or Y j1 -NR j9 -CO-(wherein, Y j1 is -CH2- or the following structural formula: [ka] An o,m, or p-dimethylsilylphenylene group represented by the above formula (in which the phenylene group is bonded to the N atom), R j9 Rf is a hydrogen atom, a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms, particularly 1 to 10 carbon atoms. The group is represented as )), and j6 and j7 are independently integers from 1 to 10, preferably from 1 to 5, in each occurrence. In the above formula, Rf j1 This represents a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group.

[0487] A monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group has the same meaning as above.

[0488] The above R j4 This refers to an epoxy group bonded to a silicon atom via a carbon atom or a carbon atom and an oxygen atom, and specifically, the following groups can be cited. [ka] (In the formula, R j10 This refers to divalent hydrocarbon groups having 1 to 10 carbon atoms, particularly 1 to 5 carbon atoms, which may include an interposed oxygen atom. Specifically, these are alkylene groups such as methylene, ethylene, propylene, butylene, hexylene, cyclohexylene, and octylene.

[0489] Examples of organosiloxanes used as the organosilicon compounds mentioned above include those shown in the following structural formula. Note that in the following, -R F The group represented by - is bonded to the group represented by Rf at the terminal oxygen atom.

[0490] [ka] [ka] [ka] [ka] [ka]

[0491] In the above formula, Me represents a methyl group, and p, q, and r are each independent integers of 0 or greater in their respective appearances. -R F - and Rf are equivalent to the above.

[0492] The trialkoxysilane used as the organosilicon compound is not particularly limited, but silanes having a reactive organic group in the same molecule in addition to an alkoxy group, such as vinyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-(methacryloxypropyl)trimethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, N-2-(aminoethyl)-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, and 3-isocyanatetopropyltriethoxysilane, as well as fluorine-containing trialkoxysilanes such as perfluoropropyltrimethoxysilane, are preferred.

[0493] The amount of the organosilicon compound is preferably in the range of 0.5 to 5 mol% in terms of SiH ratio relative to the alkenyl group of the carbon-carbon double bond-containing PFPE compound. By including the organosilicon compound within this range, the first coating 3 can have sufficient adhesion, appropriate fluidity, and curability. Such a first coating 3 may have good physical hardness.

[0494] Hydrolysis catalysts have catalytic functions to enhance the hydrolysis of organosilicon compounds.

[0495] The hydrolysis catalyst described above is not particularly limited as long as it does not inhibit the addition-curing properties of the material constituting the first coating 3, but examples include: organotitanium compounds such as titanium tetraisopropoxide, titanium tetran-butoxide, and titanium tetraacetylacetonate; organozirconium compounds such as zirconium tetran-propoxide, zirconium tetran-butoxide, and zirconium tetraacetylacetonate; organotin compounds such as dibutyltin dilaurate, dibutyltin diacetate, and dibutyltin acetylacetonate; organoaluminum compounds such as aluminum trisacetylacetonate, aluminum trisethylacetoacetate, and diisopropoxyaluminum ethylacetoacetate; and other acidic catalysts, basic catalysts, etc. Among these, from the viewpoint of storage stability of the first coating 3, it is preferable to use at least one selected from the group consisting of organotitanium compounds, organozirconium compounds, organotin compounds, and organoaluminum compounds. The hydrolysis catalyst may be used individually or in combination of two or more types.

[0496] The amount of the above hydrolysis catalyst is preferably in the range of 0.001 to 5 parts by mass, and more preferably in the range of 0.01 to 1 part by mass, per 100 parts by mass of the carbon-carbon double bond-containing PFPE compound. The above hydrolysis catalyst can exert a sufficient catalytic effect when included within the above range. By including the above range of hydrolysis catalyst, the first coating portion 3 of the present invention can have appropriate fluidity. Furthermore, it is possible to prevent the hydrolysis catalyst from hardening into a gel.

[0497] Additives can be added as needed. This can improve the practicality of the first coating portion 3. For example, an organosiloxane can be added to act as an adhesion promoter, having one or more epoxy groups in one molecule bonded to a silicon atom via a carbon atom or a carbon atom and an oxygen atom, and not having an alkoxy group.

[0498] From the viewpoint of compatibility with carbon-carbon double bond-containing PFPE compounds, dispersibility, and uniformity after curing, the above additive is more preferably one which has one or more carbon atoms bonded to a silicon atom, or a monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group bonded to a silicon atom via a carbon atom and an oxygen atom. From the viewpoint of addition reactivity with carbon-carbon double bond-containing PFPE compounds, the above additive may have one or more hydrogen atoms directly bonded to a silicon atom in one molecule.

[0499] The siloxane skeleton of the organosiloxane additive described above may be the same as that of the organosiloxanes that can be used as organosilicon compounds described above, and may be cyclic, chain-like, branched, or a mixture thereof.

[0500] The organosiloxanes mentioned above can be those represented by the following general formula.

[0501] [ka]

[0502] In the above formula, R j1 , R j6 , R j3 , R j4 j1, j2, j3, and j4 are synonymous with the above.

[0503] Examples of organosiloxanes used as additives include those shown in the following structural formulas. These compounds may be used individually or in combination of two or more. In the following formulas, Me represents a methyl group, and p, q, and r are integers of 0 or more. Rf'' is synonymous with Rf and is preferably a fluorine atom. In the following, -R F The group represented by - is bonded to the group represented by Rf'' at its terminal oxygen atom.

[0504] [ka] [ka] [ka]

[0505] The amount of the above-mentioned additive is preferably in the range of 0.01 to 10 parts by mass, and more preferably in the range of 0.1 to 5 parts by mass, per 100 parts by mass of the carbon-carbon double bond-containing PFPE compound. By including such an amount of the additive, the first coating portion 3 may have particularly good adhesion, and the fluidity of the first coating portion 3 may also be particularly good. By including such an amount of the additive, the physical strength of the first coating portion 3 may also be good.

[0506] Examples of carbon-carbon double bond-containing PFPE compounds represented by other structural formulas include carbon-carbon double bond-containing PFPE compound (B'): [ka] Compounds represented by can be used.

[0507] In equation (B'), any parts that overlap with the description of equation (B) are omitted.

[0508] R F2 Rf 1 -R F -Oq - is Rf 1 C may be substituted with one or more fluorine atoms. 1-16 It is an alkyl group. 1-16 The alkyl group may be linear or branched, preferably linear or branched C 1-6 Alkyl groups, especially linear or branched C groups. 1-3 It is an alkyl group, more preferably a linear C 1-6 Alkyl groups, especially linear C 1-3 It is an alkyl group.

[0509] The above Rf 1 Preferably, C is substituted with one or more fluorine atoms. 1-16 It is an alkyl group, more preferably C 1-16 It is a perfluoroalkyl group. 1-16 The perfluoroalkyl group may be linear or branched, preferably linear or branched C 1-6 Perfluoroalkyl groups, especially linear or branched C13C 1-3 A perfluoroalkyl group, more preferably a linear C 1-6 Perfluoroalkyl groups, especially linear C 1-3 It is a perfluoroalkyl group.

[0510] In one embodiment, Rf 1 C may be substituted with one or more fluorine atoms. 1-6 It is an alkyl group. 1-6 The alkyl group may be linear or branched, preferably linear or branched C 1-3 It is an alkyl group.

[0511] One embodiment is the above C 1-6 Alkyl groups are straight-chain carbon atoms. 1-6 It is an alkyl group, preferably C 1-3 It is an alkyl group. Rf 1In one embodiment, it is CF3-; in another embodiment, it is CF3CF2-; and in yet another embodiment, it is CF3CF2CF2-.

[0512] In the above embodiment, Rf 1 Preferably, C is substituted with one or more fluorine atoms. 1-6 It is an alkyl group, more preferably C 1-6 It is a perfluoroalkyl group. In this embodiment, the above C 1-6 The perfluoroalkyl group may be linear or branched, and preferably a linear C group. 1-6 Perfluoroalkyl groups, especially linear C 1-3 It is a perfluoroalkyl group.

[0513] β1' is an integer from 1 to 9. These β1 and β1' are X A It can change depending on the valence of β1. The sum of β1 and β1' is X A It is the same as the valence of X. For example, X A If is a 10-valent organic group, the sum of β1 and β1' is 10, and for example, β1 can be 9 and β1' can be 1, β1 can be 5 and β1' can be 5, or β1 can be 1 and β1' can be 9. Also, X A If it is a divalent organic group, then β1 and β1' are 1.

[0514] If necessary, the PFPE group-containing alkenyl compounds and hydrosilyl compounds may be diluted with a solvent. The solvents described for the PFPE group-containing silane compounds may be used.

[0515] • Polysiloxane compounds Polysiloxane compounds can be used in compositions containing fillers, pigments, dyes, colorants such as fluorescent whitening agents, antifungal agents, antimicrobial agents, surface modifiers such as non-reactive phenyl silicone oil, fluorosilicone oil, and organic liquids incompatible with silicone as bleed oils, and solvents such as toluene, xylene, solvent volatile oils, cyclohexane, methylcyclohexane, and low-boiling point isoparaffins. These components may be added at any step of the manufacturing method of the present invention.

[0516] As fillers, those described in the section on PFPE group-containing silane compounds can be used.

[0517] If the polysiloxane is an organosiloxane of type (a), (b), or (c), the compounds that may be included in the composition are listed below.

[0518] (a) Polyorganosiloxane (a) The polyorganosiloxane can be used together with reinforcing fillers, etc.

[0519] The reinforcing filler has a specific surface area of ​​50 m². 2 The amount may be 1 / g or more. Examples of reinforcing fillers include fuzzy silica, wet silica and its calcined silica, or these surface-treated with organosilane, cyclic polysiloxane, linear polysiloxane and organosilazane, or blends thereof. The reinforcing filler may be present in an amount of 10 to 100 parts by weight, preferably 20 to 50 parts by weight, per 100 parts by weight of polyorganosiloxane.

[0520] The polyorganosiloxane in (a) can be used as a processing aid, if necessary, together with silicone oil having OH or CH3O groups at its ends. It can also be used with other non-reinforcing fillers such as diatomaceous earth, crushed silica, clay, alumina, calcium carbonate, and talc, conductivity modifiers such as carbon black and graphite, roll workability modifiers such as metal soaps, heat resistance modifiers such as iron oxide and cerium oxide, as well as silane coupling agents, colorants, flame retardants, and the like.

[0521] The polyorganosiloxane in (b) may be used together with an amino group-free hydrolyzable organosilane and / or a partially hydrolyzed condensate thereof, an amino group-containing hydrolyzable organosilane and / or a partially hydrolyzed product thereof, a curing catalyst, etc.

[0522] Examples of the silanes and / or their partially hydrolyzed condensates include alkoxysilanes such as tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, and phenyltrimethoxysilane, as well as partially hydrolyzed condensates of these silanes. Among these, tetramethoxysilane, methyltrimethoxysilane, and their partially hydrolyzed condensates are preferred.

[0523] The above organosilane and / or its partial hydrolysate may be the following amino group-containing hydrolyzable organosilane and / or its partial hydrolysate. H2N-R 6k -NH-R 6m -SiR 6n 3-e61 (OR 6o ) e61

[0524] R 6k C contains an aromatic ring. 7-10 It is a divalent hydrocarbon group, phenylene A group formed by bonding a group with an alkylene group is preferred, for example, one represented by any of the following formulas. -CH2-C6H4- -CH2-C6H4-CH2- -CH2-C6H4-CH2-CH2- -CH2-C6H4-CH2-CH2-CH2- -CH2-CH2-C6H4- -CH2-CH2-C6H4-CH2- -CH2-CH2-C6H4-CH2-CH2- -CH2-CH2-CH2-C6H4- -CH2-CH2-CH2-C6H4-CH2- Among these, -CH2-C6H4-CH2- is particularly preferred. The orientation of the alkylene group bonded to the phenylene group may be ortho, meta, or para. The meta position is particularly preferred.

[0525] R6m is C 1-10 The divalent hydrocarbon group is, for example, alkylene groups such as methylene group, ethylene group, propylene group, tetramethylene group, hexamethylene group, octamethylene group, decamethylene group, 2-methylpropylene group, arylene group such as phenylene group, and groups formed by bonding these alkylene groups with arylene groups, but preferably C 1-4 It is an alkylene group.

[0526] R 6n and R 6o Each of them is independent of C 1-10 It is an unsubstituted or halogen-substituted monovalent hydrocarbon group, R 6i Examples similar to those shown can be provided in R. 6n The preferred group is a methyl group, a vinyl group, or a phenyl group, and more preferably a methyl group. 6o C 1-4 The alkyl group is preferably a methyl group or an ethyl group.

[0527] e61 is 2 or 3, provided that at least one of the primary and secondary amines is R 6k It is not directly connected to the aromatic ring.

[0528] Hydrolyzable group and / or hydroxyl group (R 6f Each molecule must have at least one O group, preferably 2 to 50, and more preferably 2 to 20. These hydrolyzable groups and / or hydroxyl groups may be bonded to silicon atoms at the ends of the molecular chain, to silicon atoms at non-terminants of the molecular chain (i.e., other than both ends of the molecular chain), or a combination thereof, but at least one of each is bonded to the ends of the molecular chain.

[0529] The curing catalyst is not particularly limited as long as it has condensation catalytic activity, but in applications where the use of organotin compound catalysts is undesirable from an environmental perspective, it is preferable to use a catalyst other than an organotin compound. Examples of such curing catalysts include, specifically, titanate esters or titanium chelates such as tetraisopropoxytitanium, tetra-n-butoxytitanium, tetrakis(2-ethylhexoxy)titanium, isopropoxytitanium bis(ethyl acetacetate), isopropoxybis(acetylacetonate)titanium, and titanium isopropoxyoctylene glycol; aluminum alcoholates or aluminum chelates such as aluminum isopropylate, aluminum sec-butyrate, aluminum ethyl acetacetate aluminum diisopropylate, aluminum tris(ethyl acetacetate), and alkyl acetacetate aluminum diisopropylate; silanes or siloxanes containing a guanidyl group such as tetramethylguanidylpropyltrimethoxysilane, tetramethylguanidylpropylmethyldimethoxysilane, and tetramethylguanidylpropyltris(trimethylsiloxy)silane; and conventionally known catalysts such as lead octylate and other acidic or basic catalysts. Among these, organotitanium compounds are preferred, titanium chelate compounds are particularly preferred, and isopropoxytitanium bis(ethylacetoacetate) and isopropoxybis(acetylacetonate)titanium are especially preferred. The curing catalyst may be used alone or as a mixture of two or more types.

[0530] For example, per 100 parts by mass of organopolysiloxane, the mixture may contain 0.2 to 30 parts by mass of an amino group-free hydrolyzable organosilane and / or a partially hydrolyzed condensate thereof, 0.1 to 10 parts by mass of an amino group-containing hydrolyzable organosilane and / or a partially hydrolyzed product thereof, and 0.1 to 20 parts by mass of a curing catalyst.

[0531] Furthermore, inorganic fillers, additives, etc. may be included as optional components.

[0532] Examples of inorganic fillers include silica-based fillers such as pulverized silica, aerosolized silica (dry silica), wet silica (sedimented silica), and crystalline silica (quartz powder), as well as aluminum hydroxide, alumina, boehmite, magnesium hydroxide, magnesium oxide, calcium hydroxide, calcium carbonate, zinc carbonate, basic zinc carbonate, zinc oxide, titanium dioxide, carbon black, glass beads, glass balloons, resin beads, and resin balloons. These may be used individually or in combination of two or more types. Among these, aerosolized silica and calcium carbonate are preferred. These inorganic fillers may be surface-treated with known treatment agents such as chlorosilane, alkoxysilane, silazane, organopolysiloxane, fatty acids, and fatty acid derivatives, even if they are not surface-treated.

[0533] When an inorganic filler is added, the amount added is preferably 0 to 300 parts by mass, and more preferably 5 to 200 parts by mass, per 100 parts by mass of the organopolysiloxane represented by formula (II-1).

[0534] Additives include, for example, polyethers as wetters and thixotropy enhancers, non-reactive dimethylsiloxane oil and methylphenylsiloxane oil as plasticizers (e.g., dimethylpolysiloxane with trimethylsiloxy groups sealed at both ends of the molecular chain, dimethylsiloxane-diphenylsiloxane copolymer with trimethylsiloxy groups sealed at both ends of the molecular chain, dimethylsiloxane-methylphenylsiloxane copolymer with trimethylsiloxy groups sealed at both ends of the molecular chain, etc.), isoparaffins, and trimethylsiloxy units [(CH3)3SiO2] as crosslink density enhancers. 1 / 2 Examples include a network polysiloxane consisting of units of SiO2 and SiO2 units. Among these, non-reactive dimethyl silicone oil and methylphenyl silicone oil can be suitably used as plasticizers to adjust hardness and workability, and when blended, the blending amount is preferably 1 to 100 parts by mass, more preferably 2 to 70 parts by mass, per 100 parts by mass of organopolysiloxane represented by formula (II-1).

[0535] The polyorganosiloxane in (c) can be used together with a silane coupling agent, a curing catalyst, a crosslinking agent, etc.

[0536] Silane coupling agents can be added for the purpose of imparting adhesion. Any conventionally known silane coupling agent can be used, and there are no particular limitations. Examples of silane coupling agents that can be used include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltrismethoxyethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, or 3-isocyanatetopropyltriethoxysilane. These silane coupling agents can be used individually or in combination of two or more. The amount of silane coupling agent added is 0.1 parts by weight or more and 20 parts by weight or less per 100 parts by weight of the silicone resin. If the amount added is less than 0.1 parts by weight, the silicone adhesive composition tends not to be given sufficient adhesion. On the other hand, if the amount added exceeds 20 parts by weight, it tends to inhibit the curing of the polyorganosiloxane. The amount added is more preferably 0.5 parts by weight or more and 15 parts by weight or less, and even more preferably 1 part by weight or more and 10 parts by weight or less. In addition, a titanate-based coupling agent or an aluminate-based coupling agent may be used instead of the silane coupling agent.

[0537] A curing catalyst can be added to accelerate the curing reaction. Any conventionally known curing catalyst can be used, and there are no particular limitations. Examples of curing catalysts include organotin, inorganic tin, titanium catalysts, bismuth catalysts, metal complexes, platinum catalysts, basic substances, and organophosphorus oxides. More preferably, the curing catalyst is a platinum catalyst or a rhodium catalyst. Examples of platinum catalysts include chloroplatinic acid, alcohol-modified chloroplatinic acid, or platinum complexes having a chelate structure. The above curing catalysts can be used individually or in combination of two or more. The amount of curing catalyst added is 5 ppm to 100 ppm by weight of platinum relative to the polyorganosiloxane. If the amount added is less than 5 ppm, the curing of the polyorganosiloxane tends not to proceed sufficiently. On the other hand, if the amount added exceeds 100 ppm, the curing proceeds too quickly, and a uniform composition tends not to be obtained. The amount of additive is more preferably 10 ppm or more and 70 ppm or less, and even more preferably 15 ppm or more and 40 ppm or less.

[0538] The crosslinking agent can be added to react with the alkenyl group-containing polyorganosiloxane to form the main skeleton of the polyorganosiloxane. Any conventionally known crosslinking agent can be used, and there are no particular limitations. Preferably, the crosslinking agent is an organohydrogenpolysiloxane having at least three hydrosilyl groups in one molecule. Examples of such crosslinking agents include polymethylhydrogensiloxane or poly(dimethylsiloxane-methylhydrogensiloxane). The above crosslinking agents can be used individually or in combination of two or more. The amount of crosslinking agent added is such that the molar ratio of [Si-H] groups in the crosslinking agent to [CH2=CH-] groups in the alkenyl group-containing polyorganosiloxane, expressed as "[Si-H] / [CH2=CH-]", is between 0.5 and 1.5. If the amount of additive is less than 0.5, the crosslinking of the polyorganosiloxane will be insufficient, and sufficient strength will not be obtained. On the other hand, if the amount of additive exceeds 1.5, the crosslinking will proceed excessively, and flexibility will be lost. The amount of additive is more preferably 0.7 or more and 1.3 or less, and even more preferably 0.9 or more and 1.1 or less.

[0539] In step A1, at least one of the following treatments may be performed on the core portion 2: plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment. After the above treatment, a composition containing the raw materials for the material constituting the first coating portion 3 is applied. This may improve the adhesion between the core portion 2 and the first coating portion 3. In one embodiment, plasma treatment is performed. In one embodiment, corona treatment is performed. In one embodiment, ultraviolet treatment is performed. In one embodiment, alkali treatment is performed.

[0540] Step A1 may include a molding step in which the core portion 2 is placed in a molding frame, and a composition containing the material constituting the first coating portion 3 is injected onto the core portion 2 and cast. This facilitates the molding of the first coating portion 3.

[0541] After step A1, the sealing material 1 of this disclosure can be formed by performing treatments such as pressurization, heating, and humidification as necessary. For example, it may be left standing for 1 to 24 hours, for example, at 1 to 5°C. Alternatively, it may be left standing at room temperature (for example, 20 to 30°C). If necessary, treatments such as pressurization and humidification may be performed simultaneously.

[0542] If necessary, a processing step may be performed to shape the core portion 2 and / or the first covering portion 3 into a desired shape.

[0543] If necessary, a second covering portion may be provided on the first covering portion 3, or on the core portion 2 and the first covering portion 3.

[0544] Before process A1, the process for constructing the core 2 may be carried out. Specifically, Process A0: Forming process for forming the core 2 using a composition containing the material that constitutes the core 2. It is possible to do so.

[0545] The above composition may include, along with the material constituting the core portion 2, a reinforcing filler, an organic peroxide, a curing catalyst, a coupling agent, a crosslinking agent, a curing retarder, a coloring agent, and the like.

[0546] Reinforcing fillers can include silica-based fillers such as pulverized silica, aerosolized silica (dry silica), wet silica (sedimented silica), and crystalline silica (quartz powder), as well as engineering plastics such as aluminum hydroxide, alumina, boehmite, aluminum fluoride, aluminum nitride, magnesium hydroxide, magnesium oxide, calcium hydroxide, calcium carbonate, zinc carbonate, basic zinc carbonate, zinc oxide, titanium dioxide, yttrium oxide, carbon black, carbon fluoride, PTFE, imide-based fillers with an imide structure, polyphenylene sulfide, polyether ketone, and polyoxybenzoate. Fillers may be hydrophobized with surface treatment agents as needed.

[0547] Examples of organic peroxides that can be used include dicumyl peroxide, ditert-butyl peroxide, 2,5-dicumyl-2,5-di(tert-butyl peroxy)hexane, 2,5-dicumyl-2,5-di(tert-butyl peroxy)hexine, di(tert-butyl peroxy)diisopropylbenzene, and 1,1'-di(tert-butyl peroxy)-3,3,5-trimethylcyclohexane.

[0548] A curing catalyst can be added, for example, to accelerate the curing reaction. Any conventionally known curing catalyst can be used, and is not particularly limited. Examples of curing catalysts include organotin, inorganic tin, titanium catalysts, bismuth catalysts, metal complexes, platinum catalysts, basic substances, and organophosphorus oxides. More preferably, the curing catalyst is a platinum catalyst or a rhodium catalyst. Examples of platinum catalysts include chloroplatinic acid, alcohol-modified chloroplatinic acid, or platinum complexes having a chelate structure. The above curing catalysts can be used individually or in combination of two or more.

[0549] A coupling agent can be added for the purpose of imparting adhesion. Examples of coupling agents include silane coupling agents. Any conventionally known silane coupling agent can be used, and is not particularly limited. Examples of silane coupling agents include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltrismethoxyethoxysilane, 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 3-glycidoxypropyltriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3-methacryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, or 3-isocyanatetopropyltriethoxysilane. Furthermore, the above-mentioned silane coupling agents can be used individually or in combination of two or more types.

[0550] The crosslinking agent can be, for example, a polyfunctional compound containing 2 to 10 hydrolyzable groups bonded to silicon in one molecule, or bonding groups such as (meth)acrylic, vinyl, allyl, iodine, thiol, epoxy, carboxylic acid, acid anhydride, or amine.

[0551] Examples of curing retarders include compounds selected from the group consisting of acetylene alcohols such as 1-ethynylcyclohexanol and 3-methyltrideca-1-in-3-ol (EMDC), silanes and siloxane modified versions of acetylene alcohols such as dimethylbis(1,1-dimethyl-2-propynyloxy)silane (PLR-22) and 3-(trimethylsilyloxy)-3-methyl-1-butyne (PLR-31), phosphite compounds (especially phosphite esters) such as tri(isopropyl) phosphite, tris(di-tert-butylphenyl) phosphite, triphenyl phosphite, and tris(2-ethylhexyl) phosphite, ethylenediamines such as tetramethylethylenediamine, benzotriazoles such as benzotriazole and 5-methyl-1H-benzotriazole, and mixtures thereof.

[0552] Colorants may include, for example, pigments, dyes, and fluorescent whitening agents.

[0553] The core 2 is formed by heating the above composition as needed. The heating is sufficient to form the composition into a sheet, and the temperature, time, etc., are not particularly limited. At this time, the composition may be cured, or it may be uncured depending on the type of compound contained in the composition.

[0554] (Manufacturing method 2) The manufacturing method 2 for the sealing material 1 includes the following steps B1 to B3. Process B1: First sheet molding process: Forming the material constituting the core 2 into a sheet to form the first sheet. Process B2: A second sheet molding step in which the material constituting the first covering portion 3 is formed into a sheet to form a second sheet, and Process B3: Sheet placement process: The first sheet and the second sheet are placed on top of each other in the molding frame. By performing steps B1 to B3 described above, the sealing material 1 can be formed.

[0555] In other words, manufacturing method 2 is characterized by pre-forming sheets from the material constituting the core portion 2 and the material constituting the first covering portion 3. By using this method, a sealing material with high dimensional accuracy can be obtained.

[0556] ·Process B1 The material constituting the core portion 2 can be used as a composition. The compounds contained in the composition have the same meaning as described above.

[0557] The first sheet can be formed into a sheet shape, and the molding method is not particularly limited, but examples include extrusion molding, compression molding, and cutting molding. The first sheet may harden on its own, or it may harden simultaneously with the second sheet, which will be described later.

[0558] After step B1, the surface of the first sheet may be subjected to at least one of the following: plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment.

[0559] ·Process B2 The material constituting the first coating portion 3 can be used as a composition. The compounds contained in the composition have the same meaning as described above.

[0560] The second sheet only needs to be molded into a sheet shape, and the molding method is not particularly limited, but it can be molded by heating as needed. The curing time is, for example, 0.1 to 24 hours. The heating temperature is, for example, 50 to 200°C. The heating time is, for example, 0.1 to 25 hours. Alternatively, it may be left to stand at room temperature without heating. Room temperature refers to, for example, 20 to 30°C. The second sheet may be cured on its own or cured simultaneously with the first sheet.

[0561] ·Process B3 The molding frame, for example, has the shape of an annular ring.

[0562] moreover, Process B4: A curing step is performed after the placement step, in which at least one of the first sheet and the second sheet is cured by heat treatment or light irradiation treatment. This can be done. The curing temperature is, for example, 50 to 200°C. The curing time is, for example, 0.1 to 24 hours. The heat treatment or light irradiation treatment may be performed only on the first sheet. The heat treatment or light irradiation treatment may be performed only on the second sheet. The heat treatment or light irradiation treatment may be performed on both the first and second sheets.

[0563] Note that instead of process B4, Process B4': After the sheet placement process, the first and second sheets are removed from the mold, followed by a curing process. You may do so.

[0564] moreover, Process B5: After the hardening process, a processing step is performed to shape the desired form. It is possible to do so.

[0565] In this step, the core portion 2 and / or the first coating portion 3 obtained in the hardening step are cut and processed into an appropriate shape. Preferably, the core portion 2 is processed.

[0566] The above processing steps can be carried out using, for example, a die cutter or a laser cutter.

[0567] A second covering portion may be provided if necessary.

[0568] [Example 1] Figure 3 is a plan view of Modification 1 of the sealing material of this disclosure. Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3. In the first embodiment, the first covering portion 3 is located on the entire upper and lower surfaces of the core portion 2, whereas in Modification 1, the first covering portion 3A is located on a portion of the upper and lower surfaces of the core portion 2A. This difference in configuration will be explained below. Other materials and configurations are the same as in the first embodiment and will not be described.

[0569] Core 2A has the same configuration as core 2.

[0570] There are two first covering portions 3A, one of which is located on a part of the upper surface of the core portion 2A, and the other first covering portion 3A is located on a part of the lower surface of the core portion 2A.

[0571] The first covering portion 3A has a convex shape with respect to the sealing direction of the sealing material 1A. One of the first covering portions 3A has a convex surface in the forward Z direction in cross-section, and the other first covering portion 3A has a convex surface in the reverse Z direction in cross-section. The two first covering portions 3A bulge in an arc shape in the forward Z direction and the reverse Z direction, respectively, and in cross-section, the center is the thickest, the thickness gradually decreases towards both ends, and the ends are the thinnest. The first covering portions 3A may have other shapes.

[0572] As shown in Figure 4, in cross-section, the maximum value of the length L1 of the first covering portion 3A (maximum value in the X direction) is not particularly limited, but may be in the range of 0.5 to 10 mm, for example, and more specifically, in the range of 1 to 5 mm. In cross-section, the ratio of the length L1 of the first covering portion 3A (in Figure 4, the length of the contact portion between the first covering portion 3A and the core portion 2A) to the length L of the sealing material 1A is not particularly limited, but may be in the range of 10% to 99%, or in the range of 20% to 95%. By exposing a part of the upper surface of the core portion 2A, the amount of material constituting the first covering portion 3A can be reduced.

[0573] In cross-section, the maximum value of the thickness T1 of the first covering portion 3A (maximum value in the Z direction) is not particularly limited, but may be in the range of 0.3 to 5 mm, more specifically in the range of 0.3 to 3 mm, and more specifically in the range of 0.7 to 2 mm.

[0574] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3A to the maximum thickness T of the sealing material 1A is not particularly limited, but may be in the range of 1 to 49%, and more specifically, in the range of 10 to 45%.

[0575] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3A to the maximum thickness T2 of the core portion 2A is not particularly limited, but may be in the range of 2 to 10,000%, and more specifically, in the range of 6 to 450%.

[0576] In this modified example, the part of the upper surface of the core 2A refers to the central part and its periphery on the upper surface of the core 2A in cross-section, and the part of the lower surface of the core 2A refers to the central part and its periphery on the lower surface of the core 2A in cross-section, but is not limited to these. The central part refers to a region in cross-section that includes the center between the left and right ends of the upper or lower surface, and has a width of 50% or less of the distance between the left and right ends, for example, 30% or less, 20% or less, or 10% or less.

[0577] [Differentiation 2] Figure 5 shows a portion of the cross-sectional view of Modification 2 of the sealing material of this disclosure. In Modification 1, the core portion 2A was rectangular in cross-section, but in Modification 2, the core portion 2B is circular. The other materials and components are the same as in Modification 1, and their description is omitted.

[0578] As shown in Figure 5, the sealing material 1B has a core portion 2B and a first covering portion 3B located on the surface of the core portion 2B. In Figure 5, the right side of the paper is the inside of the sealing material 1B, and the left side of the paper is the outside of the sealing material 1B.

[0579] The core portion 2B is circular in cross-section. However, the core portion 2B does not have to be perfectly circular and may have some distortion or unevenness. In modified example 2, the core portion 2B is solid as shown in Figure 5, but it is not limited to this and may be hollow, for example.

[0580] Each of the two first covering portions 3B is located on a portion of the upper surface and a portion of the lower surface of the core portion 2B. By exposing a portion of the upper surface and a portion of the lower surface of the core portion 2B, the amount of material constituting the first covering portion 3B can be reduced.

[0581] In cross-section, the ratio of the length L1 of the first covering portion 3B to the maximum length L of the sealing material 1B is not particularly limited, but may be in the range of 10 to 90%, and more specifically, in the range of 20 to 80%. By exposing a part of the upper surface of the core portion 2B, the amount of material constituting the first covering portion 3B can be reduced.

[0582] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3B to the maximum thickness T of the sealing material 1B is not particularly limited, but may be in the range of 1 to 30% or 5 to 20%.

[0583] In the cross-section, the ratio of the maximum thickness T2 of the core portion 2B to the maximum thickness T of the sealing material 1B is not particularly limited, but may be in the range of 30-98% or 40-90%.

[0584] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3B to the maximum thickness T2 of the core portion 2B is not particularly limited, but may be in the range of 1 to 75% or 15 to 50%.

[0585] [Difference 3] Figure 6 shows a partial cross-sectional view of Modification 3 of the sealing material of this disclosure. In Modification 2, the first covering portion 3 was located only on a portion of the core portion 2B in the cross-section, but in Modification 3, the first covering portion covers the entire core portion 2C. That is, the core portion 2C is not exposed. The other materials and components are the same as in Modification 2, and their description is omitted.

[0586] As shown in Figure 6, the sealing material 1C has a core portion 2C and a first covering portion 3C located on the surface of the core portion 2C. In Figure 6, the right side of the paper is the inside of the sealing material 1C, and the left side of the paper is the outside of the sealing material 1C.

[0587] The core portion 2C has the same structure as the core portion 2B. That is, the core portion 2C is circular in cross-section. However, the core portion 2C does not have to be perfectly circular and may have some distortion or unevenness.

[0588] The maximum length L2 of the core portion 2C (diameter) may be in the range of, for example, 1 to 10 mm, or in the range of 2 to 5 mm.

[0589] In cross-section, the ratio of the length L1 of the first covering portion 3 to the maximum length L of the sealing material 1C is not particularly limited, but may be in the range of 1 to 40% or 5 to 20%.

[0590] In the cross-section, the ratio of the maximum length L2 of the core portion 2C (the diameter of the core portion 2C in this embodiment) to the maximum length L of the sealing material 1C is not particularly limited, but may be in the range of 1 to 90% or 10 to 80%.

[0591] In the cross-section, the ratio of the length L1 of the first covering portion 3C to the maximum value of the length L2 of the core portion 2C is not particularly limited, but may be in the range of 1 to 200% or in the range of 10 to 80%.

[0592] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3C to the maximum thickness T of the sealing material 1C is not particularly limited, but may be in the range of 1 to 40% or 5 to 20%.

[0593] In cross-section, the ratio of the maximum thickness T2 of the first covering portion 3C to the maximum thickness T of the sealing material 1C is not particularly limited, but may be in the range of 1 to 90% or 10 to 80%.

[0594] In the cross-section, the ratio of the thickness T1 of the first covering portion 3C to the maximum value of the thickness T2 of the core portion 2C (in this embodiment, the diameter of the core portion 2C) is not particularly limited, but may be in the range of 1 to 200% or in the range of 10 to 80%.

[0595] The first covering portion 3C covers the entire surface of the core portion 2C.

[0596] The thickness of the first covering portion 3C does not need to be uniform.

[0597] [Differentiation Example 4] Figure 7 shows a partial cross-sectional view of Modification 4 of the sealing material of this disclosure. In Modification 3, the core portion 2C was circular in cross-section, but in Modification 4, the core portion 2D is elliptical in cross-section. The other materials and components are the same as in Modification 3, and their description is omitted.

[0598] As shown in Figure 7, the sealing material 1D has a core portion 2D and a first covering portion 3D. In Figure 7, the right side of the paper is the inside of the sealing material 1D, and the left side of the paper is the outside of the sealing material 1D.

[0599] The core portion 2D has an elliptical shape in cross-section, with its major axis in the X-axis direction and its minor axis in the Z-axis direction. The core portion 2D may have some distortion and irregularities. This configuration allows for a larger area to be sealed by the sealing material 1D. The ratio of the major axis to the minor axis is not particularly limited, but may be in the range of, for example, 1.1:1 to 5:1. Furthermore, the structure may have a minor axis in the X-axis direction and a major axis in the Z-axis direction. In this case, the load required for compression can be reduced.

[0600] In the cross-section, the ratio of the length L2 of the core portion 2D to the maximum value of the length L of the sealant 1D (the major axis of the sealant 1D) is not particularly limited, but may be in the range of 2 to 98% or 50 to 80%.

[0601] In the cross-section, the ratio of the thickness T2 of the core portion 2D to the maximum value of the thickness T of the sealant 1D (the minor axis of the sealant 1D) is not particularly limited, but may be in the range of 1 to 40% or 5 to 20%.

[0602] The first covering portion 3D covers the entire surface of the core portion 2D. In other words, the core portion 2D is not exposed.

[0603] In cross-section, the ratio of the length L1 of the first covering portion 3D to the length L of the sealing material 1D is not particularly limited, but may be in the range of 1% to 45% or 20% to 40%.

[0604] In the cross-section, the ratio of the maximum length L1 of the first covering portion 3D to the maximum length L2 of the core portion 2D is not particularly limited, but may be in the range of 1 to 450% or 30 to 200%.

[0605] In cross-section, the ratio of the thickness T1 of the first covering portion 3D to the maximum thickness T of the sealing material 1D is not particularly limited, but may be in the range of 1 to 45% or 20 to 40%.

[0606] In the cross-section, the ratio of the thickness T1 of the first covering portion 3D to the maximum value of the thickness T2 of the core portion 2D is not particularly limited, but may be in the range of 1 to 450% or 30 to 200%.

[0607] In Figure 7, the thickness of the first covering portion 3D in the major axis direction is greater than the thickness of the first covering portion 3D in the minor axis direction, but this is not limited to this. For example, the thickness of the first covering portion 3D in the major axis direction may be less than the thickness of the first covering portion 3D in the minor axis direction.

[0608] [Difference 5] Figure 8 shows a partial cross-sectional view of Modification 5 of the sealing material of this disclosure. In Modification 1, the core portion 2A was rectangular in cross-section, but in Modification 5, the core portion 2E has a C shape in cross-section. The other materials and components are the same as in Modification 1, and their description is omitted.

[0609] As shown in Figure 8, the sealing material 1E has a core portion 2E and a first covering portion 3E located on the outer surface of the core portion 2E. In Figure 8, the right side of the paper is the inside of the sealing material 1E, and the left side of the paper is the outside of the sealing material 1E.

[0610] Both ends of the core 2E are located inside the sealing material 1E, and the core 2E has a C-shape. The core 2E has an outer surface located on the outside, an inner surface located on the inside, and end surfaces connecting them. The core 2E may also have an inverted C-shape where both ends are located outside the sealing material 1E. The core 2E does not have to be symmetrical and may have some misalignment. By having the above configuration, the load required for compression can be reduced.

[0611] The diameter TE of the inner opening of the C shape is not particularly limited, but may be in the range of 0.5 to 8 mm or 1 to 3 mm. The ratio of the diameter TE to the thickness T2 of the core portion 2E is not particularly limited, but may be in the range of 5 to 1000% or 10 to 500%.

[0612] The size of the C-shaped notch, that is, the angle θ1 formed by the two end surfaces, is not particularly limited, but may be in the range of 10 to 160° or 20 to 120°.

[0613] In cross-section, the ratio of the thickness T2 of the core portion 2E to the thickness T of the sealing material 1E is not particularly limited, but may be in the range of 1 to 45% or 5 to 40%.

[0614] In cross-section, the ratio of the thickness T3 between the uppermost and lowermost parts of the core 2E to the thickness T of the sealing material 1E is not particularly limited, but may be in the range of 5-90% or 20-80%.

[0615] In cross-section, the two first covering portions 3E cover the uppermost portion and surrounding area of ​​the core portion 2E, while the other covers the lowermost portion and surrounding area of ​​the core portion 2E. The uppermost portion refers to the point on the upper surface of the core portion 2E that is furthest in the forward Z direction. The lowermost portion refers to the point on the lower surface of the core portion 2E that is furthest in the reverse Z direction.

[0616] In the cross-section, the ratio of the length L1 of the first covering portion 3E to the maximum value of the length L of the sealing material 1E (length of the core portion 2E) is not particularly limited, but may be in the range of 10 to 90% or 20 to 80%.

[0617] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3E to the thickness T of the sealing material 1E is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0618] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3E to the thickness T2 of the core portion 2E is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0619] [Modification 6] Figure 9 shows a partial cross-sectional view of Modification 6 of the sealing material of this disclosure. In Modification 1, the core portion 2A was rectangular in cross-section, but in Modification 6, the core portion 2F is convex in the inward and outward directions of the sealing material 1F in cross-section, and has concave surfaces on the upper and lower surfaces. The concave surfaces are not limited to the illustrated example, and any shape is acceptable as long as the upper and / or lower surfaces of the core portion 2F have concave surfaces, i.e., the upper surface of the core portion 2F has a concave surface and the lower surface has a concave surface. The other materials and components are the same as in Modification 1, and their description is omitted.

[0620] As shown in Figure 9, the sealing material 1F has a core portion 2F and a first covering portion 3F located on the surface of the core portion 2F. In Figure 9, the right side of the paper is the inside of the sealing material 1F, and the left side of the paper is the outside of the sealing material 1F.

[0621] The core portion 2F has, in cross-section, an innermost part 20a of the core portion 2F and an outermost part 20b of the core portion 2. In cross-section, the innermost part 20a and the outermost part 20b protrude inward and outward, respectively.

[0622] The upper surface of the core portion 2F has a first convex portion 21F and a second convex portion 22F in cross-section, which are convex in the forward Z direction, and these are connected by a connecting portion 25F. The connection of the first convex portion 21F and the second convex portion 22F by the connecting portion 25F forms a recess. That is, in the sealing member 1F, the core portion 2F has annular grooves on the upper and lower surfaces of the core portion 2F. The first covering portion 3F is provided within the recess, i.e., within the annular groove.

[0623] The lower surface of the core portion 2F has a third convex portion 23F and a fourth convex portion 24F in cross-section, which are convex in the opposite Z direction, and these are connected by a connecting portion 25F. The connection of the third convex portion 23F and the fourth convex portion 24F by the connecting portion 25F forms a recess. The first covering portion 3F is provided within the recess.

[0624] The first protrusion 21F and the second protrusion 22F have the same shape, but they may have different shapes. The third protrusion 23F and the fourth protrusion 24F have the same shape, but they may have different shapes.

[0625] In the cross-section, the distance T2 between the uppermost part of the first protrusion 21F or the second protrusion 22F and the lowermost part of the third protrusion 23F or the fourth protrusion 24F, respectively, is greater than the minimum thickness T3 of the connecting part 25F. The uppermost part refers to the point of the first protrusion 21F or the second protrusion 22F that protrudes the most in the forward Z direction. The lowermost part refers to the point of the third protrusion 23F or the fourth protrusion 24F that protrudes the most in the reverse Z direction.

[0626] The core portion 2F having the above shape facilitates manufacturing, and for example, during manufacturing, it is possible to prevent leakage of the composition containing the material constituting the first coating portion 3F, or displacement of the sheet formed from the material constituting the first coating portion 3F.

[0627] In cross-section, the two first covering portions 3F are each located in the recesses of the core portion 2F and positioned to cover the connecting portion 25F. The first covering portions 3F do not cover the uppermost parts of the first and second protrusions 21F and 22F, nor the lowermost parts of the third and fourth protrusions 23F and 44F. However, the first covering portions 3F may cover the uppermost parts of the first and second protrusions 21F and / or 22F, and the lowermost parts of the third and fourth protrusions 23F and / or 4th protrusions 24F.

[0628] In the cross-section, the ratio of the length L1 of the first covering portion 3F to the maximum value of the length L of the sealing material 1F (length of the core portion 2F) is not particularly limited, but may be in the range of 10 to 95%, or 20 to 95%.

[0629] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3F to the maximum thickness T of the sealing material 1F is not particularly limited, but may be in the range of 1 to 49% or 10 to 40%.

[0630] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3F to the maximum thickness T2 of the core portion 2F is not particularly limited, but may be in the range of, for example, 2 to 10000% or 6 to 450%.

[0631] In the cross-section, the ratio of the minimum thickness T3 of the connecting portion 25F to the maximum thickness T2 of the core portion 2F is not particularly limited, but may be in the range of 5 to 95% or 20 to 70%.

[0632] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3G protruding from the core portion 2F to the maximum thickness T of the sealing material 1F is not particularly limited, but may be in the range of 1 to 45% or 10 to 40%.

[0633] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3F protruding from the core portion 2F to the maximum value of the thickness T2 of the core portion 2F is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0634] [Difference 7] Figure 10 shows a partial cross-sectional view of Modification 7 of the sealing material of this disclosure. In Modification 6, the core portion 2F is convex toward the inside and outside of the sealing material in the cross-section, and the top and bottom surfaces are concave. However, in Modification 7, there is a core portion 2G in which two circular portions 21G and 22G are connected by a connecting portion 23G. That is, it has a dumbbell shape. The other materials and components are the same as in Modification 6, and their description is omitted.

[0635] As shown in Figure 10, the sealing material 1G has a core portion 2G and a first covering portion 3G located on the surface of the core portion 2G. In Figure 10, the right side of the paper is the inside of the sealing material 1G, and the left side of the paper is the outside of the sealing material 1G.

[0636] The core portion 2G has a first circular portion 21G on the inside and a second circular portion 22G on the outside, and the first circular portion 21G and the second circular portion 22G are connected by a connecting portion 23G. In Figure 10, the connecting line connecting the center of the first circular portion 21G and the center of the second circular portion 22G is parallel to the X direction. The upper and lower surfaces of the connecting portion 23G are parallel to the X direction. That is, in the sealing member 1G, the core portion 2G has annular grooves on the upper and lower surfaces of the core portion 2G. The first covering portion 3G is provided within the annular grooves. The core portion 2G having the above shape makes manufacturing easier, and for example, during manufacturing, it is possible to prevent leakage of the composition containing the raw materials of the first covering portion 3G, or displacement of the sheet formed from the first covering portion 3G. Although the first circular portion 21G and the second circular portion 22G have the same size in Figure 10, they may have different sizes. The upper and / or lower surfaces of the connecting portion 23G may have a slight inclination with respect to the X direction. Furthermore, the connecting portion 23G is not limited to the shape shown, and may have other shapes, for example, the upper and / or lower surfaces of the connecting portion 23G may be curved or have an uneven shape.

[0637] The first covering portion 3G is provided on the upper and lower surfaces of the core portion 2G, respectively, around the connecting portion 23G. That is, in cross-section, one of the first covering portions 3G is provided on the upper surface of the core portion 2G, i.e., on the upper side of the paper plane, and the other first covering portion 3G is provided on the lower surface of the core portion 2G, i.e., on the lower side of the paper plane. The first covering portion 3G does not cover the uppermost and lowermost parts of the circular portion in the Z direction.

[0638] In the cross-section, the ratio of the length L1 of the first covering portion 3G to the maximum value of the length L of the sealing material 1G (length of the core portion 2G) is not particularly limited, but may be in the range of 10 to 99% or 20 to 90%.

[0639] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3G to the maximum thickness T of the sealing material 1G is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0640] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3G to the maximum thickness T2 of the core portion 2G is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0641] In the cross-section, the ratio of the thickness T3 of the connecting portion 23G to the maximum value of the thickness T2 of the core portion 2G is not particularly limited, but may be in the range of 5 to 95%, or in the range of 20 to 70%.

[0642] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3G protruding from the core portion 2G to the maximum thickness T of the sealing material 1G is not particularly limited, but may be in the range of 1 to 45% or 10 to 40%.

[0643] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3G protruding from the core portion 2G to the maximum thickness T2 of the core portion 2G is not particularly limited, but may be in the range of, for example, 2 to 10000% or 6 to 450%.

[0644] [Differentiation 8] Figure 11 shows a partial cross-sectional view of Modification 8 of the sealing material of this disclosure. In the first embodiment, the upper and lower surfaces of the core portion 2 were straight (flat) in the cross-section, but in Modification 8, the upper and lower surfaces of the core portion 2H have recesses. The other materials and components are the same as in the first embodiment and their description is omitted.

[0645] As shown in Figure 11, the sealing material 1H has a core portion 2H and a first covering portion 3H located on the surface of the core portion 2H. In Figure 11, the right side of the paper is the inside of the sealing material 1H, and the left side of the paper is the outside of the sealing material 1H.

[0646] The upper and lower surfaces of the core portion 2H each have recesses. The upper and lower surfaces of the core portion 2H each curve smoothly from the inside toward the center and from the center toward the outside, thereby forming the recesses.

[0647] In cross-section, the thickness of the end region of the core 2H is greater than the thickness of the region outside the end region. The above configuration of the core 2H facilitates manufacturing, and for example, during manufacturing, it is possible to prevent leakage of the composition containing the material constituting the first coating 3H, or displacement of the sheet formed from the material constituting the first coating 3H. Here, the end region refers to the region up to 20% of the length of the core 2H (i.e., the length in the X direction in Figure 11) from each end, and the region outside the end region refers to the other region. Note that the recess is not limited to the example shown, and any shape is acceptable as long as the thickness of the end region of the core 2H is greater than the thickness of the region outside the end region.

[0648] Furthermore, the thickness of one end region of the core portion 2H may be greater than the thickness of the regions other than the end region. The upper surface of the core portion 2H may have a recess and the lower surface may be straight, or vice versa. The upper surface and / or lower surface of the core portion 2H may each have a recess and a flat portion connected to the recess.

[0649] In the cross-section, the inner and outer thicknesses T2 of the core 2H may be greater than the central thickness T3 of the core 2H. The ratio of the thickness T3 to the maximum value of the thickness T2 of the core 2H is not particularly limited, but may be in the range of 10-99% or 40-90%.

[0650] The two first covering portions 3H are positioned in cross-section to cover the upper and lower surfaces of the core portion 2H, respectively. That is, the recesses of the core portion 2H are covered by the first covering portions 3H.

[0651] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3H to the maximum thickness T of the sealing material 1H is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0652] In the cross-section, the ratio of the maximum thickness T2 of the core portion 2H to the maximum thickness T of the sealing material 1H is not particularly limited, but may be in the range of 1 to 98% or 10 to 80%.

[0653] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3H to the maximum thickness T2 of the core portion 2H is not particularly limited, but may be in the range of 1 to 49% or 10 to 40%.

[0654] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3H protruding from the core portion 2H to the maximum thickness T of the sealing material 1H is not particularly limited, but may be in the range of 1 to 49% or 10 to 40%.

[0655] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3H protruding from the core portion 2H to the maximum value of the thickness T2 of the core portion 2H is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0656] [Modification 9] Figure 12 shows a partial cross-sectional view of Modification 9 of the sealing material of the present disclosure. In the first embodiment, the core portion 2 was rectangular in cross-section, but in Modification 9, the inner end region of the core portion 2I is shifted upward and the outer end region is shifted downward; that is, the inner end region of the upper surface is inclined inward and upward, and the outer end region is inclined outward and downward. The other materials and components are the same as in the first embodiment, and their description is omitted.

[0657] As shown in Figure 12, the sealing material 1I has a core portion 2I and a first covering portion 3I located on the surface of the core portion 2I. In Figure 12, the right side of the paper is the inside of the sealing material 1I, and the left side of the paper is the outside of the sealing material 1I.

[0658] In the cross-section of the core 2I, the outer end is located at the lowest point on the upper surface, the inner end at the highest point, and the area in between is located in between. Similarly, in the cross-section of the core 2I, the outer end is located at the lowest point on the lower surface, the inner end at the highest point, and the area in between (the central area) is located in between. The above configuration of the core 2I makes it easier to check for twisting or displacement when installing the sealing material 1I. Alternatively, in the cross-section of the core 2I, the outer end may be located at the highest point on the lower surface, the inner end at the lowest point, and the area in between may be located in between.

[0659] In the cross-section, the ratio of the length L3 of the central region to the maximum length of the core portion 2I parallel to the X-axis (length L of the sealing material 1I) may be, for example, in the range of 30 to 95% or in the range of 60 to 90%. With the above configuration, good sealing performance is maintained even at low temperatures.

[0660] In the cross-section, the ratio of the thickness T2 of the core portion 2I (thickness parallel to the Z-axis) to the maximum thickness T of the sealing material 1I is not particularly limited, but may be in the range of 1 to 98% or 10 to 80%.

[0661] The angle θ2 between the outer end region or the inner end region and the central region is not particularly limited, but may be in the range of 90 to 170° or 110 to 170°.

[0662] The two first covering portions 3I each cover the entire upper and lower surfaces of the core portion 2I in cross-section.

[0663] In cross-section, the ratio of the thickness T1 of the first covering portion 3I to the maximum thickness T of the sealing material 1I (the thickness T1 of the first covering portion 3I on the central region of the core portion 2I) is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0664] The ratio of the thickness T1 of the first covering portion 3I to the thickness T2 of the core portion 2I (thickness T2 of the central region of the core portion 2I) is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0665] [Example 10] Figure 13 shows a partial cross-sectional view of Modification 10 of the sealing material of the present disclosure. In the first embodiment, the core portion 2 was rectangular in cross-section, but in Modification 10, the upper surface of the core portion 2J has a flat surface and an inclined surface that slopes upward from the flat surface toward the inner end surface or the outer end surface, and the lower surface of the core portion 2J has a flat surface and an inclined surface that slopes downward from the flat surface toward the inner end surface or the outer end surface. That is, the core portion 2J has an expanded portion whose thickness increases toward the inside or outside and a first portion connected to both expanded portions, i.e., sandwiched between the two expanded portions. The expanded portion is a portion that is thicker than the first portion. The first portion has a constant thickness, i.e., its upper and lower surfaces are flat. In the core portion 2J, the thickness gradually increases toward the end, and the thickness is greatest at the end. Other materials and components are the same as in the first embodiment and their description is omitted.

[0666] As shown in Figure 13, the sealing material 1J has a core portion 2J and a first covering portion 3J located on the surface of the core portion 2J. In Figure 13, the right side of the paper is the inside of the sealing material 1J, and the left side of the paper is the outside of the sealing material 1J.

[0667] In cross-section, the core portion 2J has a first portion and two extended portions connected to both ends thereof. Specifically, the core portion 2J has a first extended portion that slopes linearly from one end of the first portion toward the inner end face and whose thickness (thickness in the Z direction) is greater than that of the first portion toward the inner end face, a second extended portion that slopes linearly from the other end of the first portion toward the outer end face and whose thickness is greater than that of the first portion toward the outer end face, and a first portion with a constant thickness that connects the first extended portion and the second extended portion. The thickness of the first extended portion and the second extended portion gradually increases toward the end side. The upper and lower surfaces of the first extended portion and the second extended portion are flat. The upper and lower surfaces of the first portion are flat. The upper and lower surfaces of the first extended portion and the second extended portion may have some irregularities.

[0668] The maximum thickness T2 of the first and second expansion portions is greater than the thickness T3 of the first portion. This configuration facilitates the manufacturing of the core portion 2J, preventing, for example, leakage of the composition containing the material constituting the first covering portion 3J during manufacturing, or displacement of the sheet formed from the first covering portion 3J. The ratio of the thickness T3 to the maximum thickness T2 is not particularly limited, but may be in the range of 10-99% or 40-90%.

[0669] The ratio of the length L3 of the first part to the length of the core 2I in the X direction (length L of the sealing material 1J) is not particularly limited, but may be in the range of 30-95% or 60-90%.

[0670] In the cross-section, the thickness of the end region of the core 2J is greater than the thickness of the region outside the end region. In the cross-section, the thickness T2 of the inner and outer circumferential surfaces of the core 2J is greater than the thickness T3 of the first part of the core 2H. Here, the end region refers to the region included in the 20% from one end of the average length of the core 2J in the X direction, and the region outside the end region refers to the other region. In subsequent modifications, the terms end region and region outside the end region will have the same meaning as above. Note that each end region may include only the first or second extended portion, or it may include the first or second extended portion along with a part of the first part, or it may include only a part of the first or second extended portion.

[0671] The two first covering portions 3J are positioned in cross-section to cover the entire upper and lower surfaces of the core portion 2J, respectively.

[0672] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3J to the maximum thickness T of the sealing material 1J is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0673] In cross-section, the ratio of the thickness T2 at both ends of the core portion 2J to the maximum thickness T of the sealing material 1J is not particularly limited, but may be in the range of 10-90% or 20-70%.

[0674] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3J to the thickness T2 of the core portion 2J is not particularly limited, but may be in the range of, for example, 2 to 10000% or 6 to 450%.

[0675] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3J protruding from the core portion 2J to the maximum thickness T of the sealing material 1J may be in the range of, for example, 1 to 49%, or in the range of 10 to 45%.

[0676] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3J protruding from the core portion 2J to the maximum value of the thickness T2 of the core portion 2J may be in the range of, for example, 2 to 10000% or in the range of 6 to 450%.

[0677] [Example 11] Figure 14 shows a partial cross-sectional view of Modification 11 of the sealing material of this disclosure. In Modification 10, the first covering portion 3J is positioned to cover the entire upper and lower surfaces of the core portion 2J in the cross-section, whereas in Modification 11, the first covering portion 3K is positioned to cover a portion of the upper and lower surfaces of the core portion 2K. Specifically, in Modification 11, the first covering portion 3K is provided on a portion of the upper and lower surfaces of the first part of the core portion 2K. The other materials and components are the same as in Modification 10, and their description is omitted.

[0678] As shown in Figure 14, the sealing material 1K has a core portion 2K and a first covering portion 3K located on the surface of the core portion 2K. In Figure 1K, the right side of the paper is the inside of the sealing material 1K, and the left side of the paper is the outside of the sealing material 1K.

[0679] The core portion 2K has the same configuration as the core portion 2J in modified example 10.

[0680] In the cross-section, the two first covering portions 3K are each located on a part of the first portion. The first covering portions 3K may also cover a part of the first and / or second expanded portion of the core portion 2K.

[0681] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3K to the maximum thickness T of the sealing material 1K is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0682] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3K to the maximum thickness T2 of the core portion 2K is not particularly limited, but may be in the range of 2 to 1000% or 6 to 450%.

[0683] The maximum thickness T2 of the first and second expansion portions is greater than the thickness T3 of the first portion. This configuration facilitates the manufacturing of the core portion 2J, preventing, for example, leakage of the composition containing the material constituting the first covering portion 3J during manufacturing, or displacement of the sheet formed from the first covering portion 3J. The ratio of the thickness T3 to the maximum thickness T2 is not particularly limited, but may be in the range of 10-99% or 40-90%.

[0684] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3K protruding from the core portion 2K to the maximum thickness T of the sealing material 1K is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%. The above configuration improves the sealing performance of the sealing material 1K.

[0685] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3K protruding from the core portion 2K to the maximum thickness T2 of the core portion 2K is not particularly limited, but may be in the range of, for example, 2 to 10000% or 6 to 450%. The above configuration improves the sealing performance of the sealing material 1K.

[0686] In the cross-section, the ratio of the length L3 of the first portion to the length of the core portion 2K in the X direction (length L of the sealing material 1K) is not particularly limited, but may be in the range of 25-99% or 50-95%.

[0687] [Example 12] Figure 15 shows a partial cross-sectional view of Modification 12 of the sealing material of this disclosure. In the first embodiment, the upper and lower surfaces of the core 2 were straight (flat) in cross-section. However, in Modification 12, the upper surface of the core 2L has an inclined surface that slopes upward from the central part toward the inner or outer end surface, and the lower surface of the core 2L has an inclined surface that slopes downward from the central part toward the inner or outer end surface. That is, the thickness of the central part is greater than the thickness of the inner and outer end surfaces. The other materials and components are the same as in the first embodiment, and their description is omitted.

[0688] As shown in Figure 15, the sealing material 1L has a core portion 2L and a first covering portion 3L located on the surface of the core portion 2L. In Figure 15, the right side of the paper is the inside of the sealing material 1L, and the left side of the paper is the outside of the sealing material 1L.

[0689] In cross-section, the core portion 2L has a first expanded portion that slopes linearly from the central portion toward the inner end face and becomes thicker toward the inner end face than the central portion, and a second expanded portion that slopes linearly from the central portion toward the outer end face and becomes thicker toward the outer end face than the central portion. The first expanded portion and the second expanded portion are connected to form the core portion 2L. The connection between the two is located in the middle of the length of the core portion 2L in the X direction. The above configuration of the core portion 2L facilitates manufacturing, and for example, during manufacturing, it is possible to prevent leakage of the composition containing the material constituting the first coating portion 3L, or displacement of the sheet formed from the material constituting the first coating portion 3L.

[0690] In the cross-section, the ratio of the thickness T3 of the connecting portion to the maximum value of the thickness T2 of the first and second expanded portions (thickness at the inner or outer end face) is not particularly limited, but may be in the range of 10 to 99%, and more specifically, in the range of 40 to 90%.

[0691] The two first covering portions 3L are positioned in cross-section to cover the entire upper and lower surfaces of the core portion 2L, respectively.

[0692] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3L to the maximum thickness T of the sealing material 1L is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0693] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3L to the maximum thickness T2 of the core portion 2L is not particularly limited, but may be in the range of, for example, 2 to 10000% or 6 to 450%.

[0694] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3L protruding from the core portion 2L to the maximum thickness T of the sealing material 1L is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0695] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3L protruding from the core portion 2L to the maximum value of the thickness T2 of the core portion 2L is not particularly limited, but may be in the range of, for example, 2 to 10000% or 6 to 450%.

[0696] When viewed from a cross-section, the ratio of the maximum thickness T2 of the core portion 2L to the maximum thickness T of the sealing material 1L is not particularly limited, but may be in the range of 1 to 98% or 10 to 80%.

[0697] [Modified example 13] Figure 16 shows a partial cross-sectional view of Modification 13 of the sealing material of this disclosure. In Modification 12, the first covering portion 3L is positioned to cover the entire upper and lower surfaces of the core portion 2L in the cross-section, whereas in Modification 13, the first covering portion 3M is positioned to cover a portion of the upper and lower surfaces of the core portion 2M. Specifically, in Modification 13, the first covering portion 3M is provided on the upper surface and a portion of the mask of the central part of the core portion 2M. The other materials and components are the same as in Modification 12, and their description is omitted.

[0698] As shown in Figure 16, the sealing material 1M has a core portion 2M and a first covering portion 3M located on the surface of the core portion 2M. In Figure 16, the right side of the paper is the inside of the sealing material 1M, and the left side of the paper is the outside of the sealing material 1M.

[0699] The core portion 2M has the same configuration as the core portion 2K of modified example 12.

[0700] In cross-section, the two first covering portions 3M are positioned to cover the connection between the first and second expansion portions and their surrounding areas. That is, the two first covering portions 3M cover only the connection between the upper and lower surfaces of the core portion 2M and their surrounding areas.

[0701] In cross-section, the ratio of the length L1 of the first covering portion 3M to the maximum length L of the sealing material 1M is not particularly limited, but may be in the range of 10-99% or 20-90%.

[0702] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3M to the maximum thickness T of the sealing material 1M is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0703] In the cross-section, the ratio of the maximum thickness T1 of the first covering portion 3M to the maximum thickness T2 of the core portion 2M is not particularly limited, but may be in the range of 2 to 1000% or 6 to 450%.

[0704] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3M protruding from the core portion 2M to the maximum thickness T2 of the core portion 2M is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0705] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3M protruding from the core portion 2M to the maximum thickness T of the sealing material 1M is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0706] [Example 14] Figure 17 shows a cross-sectional view of a part of Modification 1N of the sealing material of this disclosure. In Modification 1, the core portion 2A was rectangular in cross-section, but in Modification 14, the core portion 2N is H-shaped. Specifically, in cross-section, the core portion 2N has a first portion aligned inward of the sealing material 1N, a second portion aligned outward of the sealing material 1N, and a third portion connecting a part of the first portion and a part of the second portion, parallel to the X-axis, and passing through the center of the upper and lower surfaces of the sealing material 1N. The other materials and components are the same as in Modification 1, and their description is omitted. This configuration reduces internal permeability and improves sealing performance. Furthermore, it can produce good effects in multifunctionality, for example, improved solvent resistance, corrosion resistance, and radical resistance of the sealing material can be expected.

[0707] As shown in Figure 17, the sealing material 1N has a core portion 2N and a first covering portion 3N located on the surface of the core portion 2N. In Figure 17, the right side of the paper is the inside of the sealing material 1N, and the left side of the paper is the outside of the sealing material 1N.

[0708] In cross-section, the two first covering portions 3N each cover the upper and lower surfaces of the core portion 2N, respectively.

[0709] In the cross-section, the ratio of the maximum value L1 of the length of the first covering portion 3N to the length L of the sealing material 1N (length of the core portion 2N) is not particularly limited, but may be in the range of 10 to 100% or 20 to 95%.

[0710] In the cross-section, the ratio of the length L3 of the third portion to the length 2N of the core portion (length L of the sealing material 1N) is not particularly limited, but may be in the range of 30-95% or 60-90%.

[0711] In cross-section, the ratio of the maximum thickness T1 of the first covering portion 3N to the maximum thickness T of the sealing material 1N is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0712] In the cross-section, the ratio of the maximum thickness T2 of the core portion 2N to the maximum thickness T of the sealing material 1N is not particularly limited, but may be in the range of 1 to 98% or 10 to 80%.

[0713] In the cross-section, the ratio of the minimum thickness T3 of the core portion 2N to the maximum thickness T2 of the core portion 2N is not particularly limited, but may be in the range of 10-99% or 40-90%. The maximum thickness T2 of the core portion 2N is the thickness of the first and second portions of the core portion 2N, and the minimum thickness T3 of the core portion 2N is the thickness of the third portion of the core portion 2N.

[0714] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3N protruding from the core portion 2N to the maximum thickness T2 of the core portion 2N is not particularly limited, but may be in the range of, for example, 2 to 10,000% or 6 to 450%.

[0715] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3N protruding from the core portion 2N to the maximum thickness T of the sealing material 1N is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0716] [Difference 15] Figure 18 shows a partial cross-sectional view of Modification 1P of the sealing material of this disclosure. In Modification 1, the core portion 2A was rectangular in cross-section, but in Modification 15, the core portion 2P is rhomboid in shape, with the greatest thickness in the center. The other materials and components are the same as in Modification 1, and their description is omitted.

[0717] As shown in Figure 18, the sealing material 1P has a core portion 2P and a first covering portion 3P located on the surface of the core portion 2P. In Figure 18, the right side of the paper is the inside of the sealing material 1P, and the left side of the paper is the outside of the sealing material 1P.

[0718] In cross-section, the core portion 2P is rhombus-shaped. One diagonal of the core portion 2P is parallel to the X-axis (parallel to the annular plane of the core portion 2P), and the other diagonal is parallel to the Z-axis (perpendicular to the annular plane of the core portion 2P). In this modified example, the diagonal parallel to the X-axis is longer than the diagonal parallel to the Z-axis. That is, the core portion 2P has a thickness in the center, i.e., a diagonal parallel to the Z-axis.

[0719] In the cross-section, the maximum value of the length of the core 2P in the X direction (length L of the sealing material 1P) and the maximum value of the thickness of the core 2 (length of the diagonal perpendicular to the annular plane of the core 2P) are not particularly limited, but may be in the range of 1:100 to 1:1, or in the range of 1:10 to 1:2.

[0720] In the cross-section, the two first covering portions 3P are each located on a portion of the central part.

[0721] In cross-section, the ratio of the length L1 of the first covering portion 3P to the maximum value of the length L of the sealing material 1P (the length of the diagonal of the core portion 2P that is parallel to the annular plane) is not particularly limited, but may be in the range of 10 to 99% or 20 to 95%.

[0722] In cross-section, the ratio of the thickness T1 of the first covering portion 3P located on a diagonal perpendicular to the annular plane of the core portion 2P to the maximum thickness T of the sealing material 1P is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0723] In cross-section, the ratio of the maximum thickness T2 of the core 2P in the Z-axis direction (length of the diagonal perpendicular to the annular plane of the core 2P) to the maximum thickness T of the sealing material 1P is not particularly limited, but may be in the range of 1 to 98% or 10 to 80%.

[0724] In the cross-section, the ratio of the thickness T1 of the first covering portion 3P to the maximum value of the thickness T2 of the core portion 2P (the length of the diagonal of the core portion 2P that is perpendicular to the annular plane) is not particularly limited, but may be in the range of 2 to 10000% or 6 to 450%.

[0725] [Example 16] Figure 19 shows a partial cross-sectional view of a modified example 16 of the sealing material of the present disclosure. As shown in Figure 19, the sealing material 1Q has a core portion 2Q and a first covering portion 3Q located on the surface of the core portion 2Q. In Figure 19, the right side of the paper is the inside of the sealing material 1Q, and the left side of the paper is the outside of the sealing material 1Q. In this modified example 16, the core portion 2Q has an inner opening facing inward toward the sealing material 1Q, and the shape including the inner opening is trapezoidal. In cross-section, the core portion 2Q has a first portion and a second portion (the upper and lower bases of the trapezoid) facing each other, and a connecting portion connecting their outer ends. In cross-section, the first portion is located above the second portion, and the first portion is shorter than the second portion. The first portion and the second portion each have end faces 21Q and 22Q facing inward toward the sealing material 1Q. The end face 21Q of the first portion and the end face 22Q of the second portion are on the same plane. The connecting portion is inclined with respect to the Z-axis, with the first portion side positioned further inward of the seal material. The seal material 1Q has two first covering portions 3Q. One first covering portion 3Q is located on the first portion and covers a portion of the upper surface of the core portion 2Q. The other first covering portion 3Q is located on the second portion and covers a portion of the lower surface of the core portion 2Q. In cross-section, the length of the first covering portion 3Q located on the upper surface of the core portion 2Q is shorter than the length of the first covering portion 3Q located on the lower surface. The other materials and configuration are the same as in Modification 1, and their description is omitted. By having the above configuration, the torque required for compression can be reduced. Furthermore, the connecting section, the first section, and the second section may each have a curved section. Also, the length of the second section may be less than or the same as the length of the first section.

[0726] The opening distance TQ of the inner opening of the core portion 2Q is, for example, in the range of 0.5 to 10 mm, specifically in the range of 1 to 5 mm. The ratio of the opening distance TQ of the inner opening to the thickness T2 of the core portion 2Q is not particularly limited, but may be in the range of 30 to 100% or 10 to 200%.

[0727] The ratio of the length L22 of the contact surface of the first covering portion 3Q provided on the upper surface to the length L21 of the upper surface of the core portion 2Q is not particularly limited, but may be in the range of 10% to 99% or 20% to 95%.

[0728] The ratio of the length L32 of the contact surface of the first covering portion 3Q provided on the lower surface to the length L31 of the lower surface of the core portion 2Q is not particularly limited, but may be in the range of 10% to 99% or 20% to 95%.

[0729] In cross-section, the ratio of the thickness T1 of the first covering portion 3Q to the maximum thickness T of the sealing material 1Q is not particularly limited, but may be in the range of 10 to 45%, and more specifically, in the range of 20 to 40%.

[0730] In the cross-section, the ratio of the thickness T1 of the first covering portion 3Q to the thickness T2 of the core portion 2Q is not particularly limited, but may be in the range of 2 to 1,000%, and more specifically, in the range of 30 to 300%.

[0731] <Second Embodiment> Figure 20 is a plan view showing the sealing material 1R of the second embodiment of this disclosure. Figure 21 is a cross-sectional view taken along line XXI-XXI of Figure 20. In the cross-section, the core portion 2R of the second embodiment has a cross shape. The composition and effects of the core portion and the first covering portion are the same as in the first embodiment, and their description is omitted.

[0732] As shown in Figures 20 and 21, the sealing material 1R has a core portion 2R and a first covering portion 3R located on the surface of the core portion 2R. In Figure 21, the right side of the paper is the inside of the sealing material 1R, and the left side of the paper is the outside of the sealing material 1R.

[0733] As shown in Figure 21, the sealant 1R is circular. The sealant 1R may also be approximately circular or elliptical.

[0734] The core portion 2R is composed of a first core portion 21R and a second core portion 22R. In cross-section, the first core portion 21R and the second core portion 22R intersect in a cross shape. The first core portion 21R penetrates the seal material 1R in the reverse Z direction from the inside to the outside of the seal material 1R. The second core portion 22R penetrates the seal material 1R in the forward Z direction from the inside to the outside of the seal material 1R. That is, in a top view (in Figure 20), the first covering portion 3R, the first core portion 21R, the first covering portion 3R, the second core portion 22R, and the first covering portion 3R are located in that order from the inside. In Figure 21, viewed from the inside of the seal material 1R, the first covering portion 3R, the second core portion 22R, the first covering portion 3R, the first core portion 21R, and the first covering portion 3R are located in that order from the bottom (bottom of the paper). With the above configuration, even if the seal position shifts due to twisting during installation, the sealing performance can be maintained, potentially increasing the reliability of the sealing material 1R.

[0735] In the cross-section, the angle θ3 at which the first core portion 21R and the second core portion 22R intersect is approximately 90°, specifically 90°. Note that the angle θ3 is not limited to the above value and may have other values, such as 15° or 30°. In other words, the angle θ3 may take any value between 0° and less than 90°.

[0736] The thickness T20 of the first core portion 21R and the second core portion 22R are not particularly limited, but may be in the range of 0.1 to 3 mm, or may be the value obtained by dividing the thickness T2 by the square root of 2.

[0737] There are four first covering portions 3R, each covering the space between the first core portion 21R and the second core portion 22R, forming a sealing material 1R with a circular cross-section. Each first covering portion 3R has a fan shape, or in this embodiment, a quarter-circle shape.

[0738] In cross-section, the ratio of the straight-line distance L1 between adjacent first core portion 21R and second core portion 22R exposed on the surface of the sealant 1R to the maximum length L of the sealant 1R is not particularly limited, but may be in the range of 10 to 90%, and more specifically, in the range of 20 to 80%.

[0739] In cross-section, the ratio of the thickness T1 of the first covering portion 3R to the maximum thickness T of the sealing material 1R is not particularly limited, but may be in the range of 1 to 49% or 10 to 45%.

[0740] In the cross-section, the ratio of the thickness T1 of the first covering portion 3R to the thickness T2 of the core portion 2R is not particularly limited, but may be in the range of 10 to 1000% or 50 to 500%.

[0741] In cross-section, the ratio of the thickness T4 of the first covering portion 3R protruding from the core portion 2R to the maximum thickness T of the sealing material 1R is not particularly limited, but may be in the range of 1 to 40% or 5 to 30%.

[0742] When viewed from the inside, the ratio of the thickness T4 of the first covering portion 3R protruding from the core portion 2R to the maximum value of the thickness T2 of the core portion 2R is not particularly limited, but may be in the range of 1 to 500% or 10 to 300%.

[0743] <Third Embodiment> Figure 22 is a plan view of a second embodiment of the sealing material of this disclosure. Figure 23 is a cross-sectional view taken along line XXIII-XXIII of Figure 22. In the first embodiment, the core portion 2 was annular, but in this third embodiment, the core portion 2S is sheet-like. Sheet-like means having two opposing main surfaces, and the distance between these main surfaces, i.e., the thickness, is extremely small compared to the main surfaces. For example, the dimensions of the main surfaces, such as length and width or diameter, are 10 times larger than the thickness. This difference in configuration will be explained below. Other materials and configurations are the same as in the first embodiment, and their explanation will be omitted.

[0744] As shown in Figures 22 and 23, the sealing material 1S has a core portion 2S and a first covering portion 3S located on the surface of the core portion 2S. In Figure 23, the right side of the paper is the inside of the sealing material 1S, and the left side of the paper is the outside of the sealing material 1S.

[0745] The core portion 2S is a sheet-like structure that is parallel to the XY plane and has only a flat surface, and has an opening 4 that penetrates in the thickness direction. As shown in Figures 22 and 23, the core portion 2S has a larger area occupied by the first covering portion 3S. This configuration makes it easier to process the sealing material 1S into an appropriate structure.

[0746] The maximum length of the core 2S in the X direction (the length L of the sealing material 1S in the X direction) may be in the range of 10 to 1000 mm, specifically in the range of 30 to 500 mm. The maximum length of the core 2S in the Y direction may be in the range of 10 to 1000 mm, specifically in the range of 30 to 500 mm. The maximum thickness T2 of the core 2S may be in the range of 0.01 to 100 mm, specifically in the range of 0.5 to 5 mm.

[0747] The sealing material 1S of this disclosure has a first covering portion 3S on the surface of the core portion 2S. In this embodiment, as shown in Figures 22 and 23, the first covering portion 3S is located on the upper and lower surfaces of the core portion 2S. That is, there are two first covering portions 3S, as shown in Figure 23.

[0748] As shown in Figure 22, the first covering portion 3S is annular when viewed from the forward Z direction. The first covering portion 3S has an opening 4 that penetrates the sealing material 1S in the thickness direction.

[0749] As shown in Figure 23, the two first covering portions 3S are located on a portion of the upper surface and a portion of the lower surface of the core portion 2S, respectively. The first covering portions 3S are smoothly continuous with the core portion 2S on the inner circumferential surface, that is, there is no step at their boundary. However, on the inner circumferential surface, the first covering portions 3S and the core portion 2S may not be continuous, and there may be a step at their boundary.

[0750] As shown in Figures 22 and 23, the maximum length L1 of the first covering portion 3S in the X direction may be in the range of 0.5 to 10 mm, specifically in the range of 1 to 5 mm. The maximum length of the first covering portion 3S in the Y direction may be in the range of 3 to 1000 mm, specifically in the range of 10 to 500 mm. The maximum thickness T1 of the first covering portion 3S may be in the range of 0.1 to 10 mm, specifically in the range of 0.5 to 3 mm.

[0751] In the cross-section (Figure 23), the ratio of the length L1 of the first covering portion 3S to the length L of the core portion 2S is not particularly limited, but may be in the range of 0.05 to 100% or 1 to 50%.

[0752] In cross-section, the ratio of the thickness T1 of the first covering portion 3S to the maximum thickness T of the sealing material 1S is not particularly limited, but may be in the range of 1 to 49%, and more specifically, in the range of 10 to 45%.

[0753] In cross-section, the ratio of the thickness T1 of the first covering portion 3S to the thickness T2 of the core portion 2S is not particularly limited, but may be in the range of 1 to 10000%, and more specifically, in the range of 6 to 450%.

[0754] Although Figure 22 shows only one first covering portion 3S as an example, there is no limit to the number, and multiple first covering portions 3S may be provided, for example, two or more first covering portions 3S. Specifically, 2 to 100 first covering portions 3S may be provided.

[0755] The core portion 2S and the first covering portion 3S are not limited to the above-described form and may have other forms. For example, they may have the modified forms described above. For example, the core portion 2S may have the forms of modified forms 2, 6-10, 12, or 14.

[0756] [Manufacturing method for sealant 1S] The method for manufacturing the seal material 1S of the third embodiment can be the same as the method for manufacturing the seal material 1 of the first embodiment.

[0757] Although embodiments have been described above, it should be understood that various modifications to the form and details are possible without departing from the spirit and scope of the claims.

[0758] For example, the first covering portion 3 has a convex shape with respect to the sealing direction of the sealing material 1, and the sealing direction may be the forward X direction and / or the reverse X direction.

[0759] The examples illustrated in the first embodiment, variations 1 to 16, the second embodiment, and the third embodiment are symmetrical vertically, but are not limited to this. [Examples]

[0760] The sealing material of the present invention will be described in more detail through the following examples, but the present invention is not limited to these examples.

[0761] <Preparation of curing composition 1> To 100 parts by weight of compound (A), 2 parts by weight of tetraethoxysilane as a crosslinking agent and 2 parts by weight of tetraisopropoxytitanate as a curing catalyst were weighed into a glass container for mixing, and the mixture was stirred to prepare a curable composition. Furthermore, carbon black (nitrogen adsorption specific surface area 50 g / m²) was added. 2Fifteen parts by weight of ) were added and mixed uniformly in a planetary mixer to obtain curing composition 1. The mixing ratios are shown in the table below.

[0762] [Table 1]

[0763] <Preparation of curing composition 2> Compound (B) is used instead of compound (A), methyltrimethoxysilane is used instead of tetraethoxysilane as a crosslinking agent, and surface hydrophobic silica (nitrogen adsorption specific surface area 120 g / m²) is used instead of carbon black. 2 Using the same procedure as for curing composition 1, curing composition 2 was prepared. The mixing ratios are shown in the table below.

[0764] [Table 2]

[0765] <Preparation of curing composition 3> Fluorosilicone moisture curing Compound (D) was used instead of compound (A), methyltrimethoxysilane was used instead of tetraethoxysilane as a crosslinking agent, di-n-butyltin dilaurate was used as a curing catalyst, and calcium carbonate (nitrogen adsorption specific surface area 70 g / m²) was used instead of carbon black. 2 Using the same procedure as for curing composition 1, curing composition 2 was prepared using the respective ingredients. The mixing ratios are shown in the table below.

[0766] [Table 3]

[0767] <Preparation of curing composition 4> Thermosetting system A curable composition was prepared by weighing 100 parts by weight of compound (C), 5 parts by weight of compound (E) as a crosslinking agent, and 1 part by weight of a xylene solution containing 2% of a Pt complex of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane as a curing catalyst into a glass container for mixing, stirring and mixing. Furthermore, carbon black (nitrogen adsorption specific surface area 130 g / m²) was added. 2 Eight parts by weight of ) were added and mixed uniformly in a planetary mixer to obtain curing composition 4. The mixing ratios are shown in the table below.

[0768] [Table 4] (*1) SiH / allyl equivalent is 1.05 [ka]

[0769] <Preparation of sealant material shape 1> (Example 1) A core O-ring made of FFKM (hardness A70) (outer diameter 38mm, inner diameter 31mm, wire diameter 3.5mm) was prepared. As a pre-coating treatment, the core surface was cleaned using an atmospheric pressure plasma generator. During this process, dry air at a pressure of 0.4 MPa was used to generate the plasma. After cleaning, a 35mm diameter circle was applied and drawn onto one side of the O-ring (the upper surface of the core) using curing composition 1 with an air dispenser. The application thickness was adjusted to 0.3mm (Example 1-1), 0.7mm (Example 1-2), or 1.0mm (Example 1-3). The mixture was then left to stand at room temperature for 24 hours to cure until the applied liquid was fixed. Subsequently, a 35mm diameter circle was similarly applied and drawn onto the opposite side of the O-ring (the underside of the core) using an air dispenser, and the sealant was cured at room temperature to prepare it. The cross-section of the obtained sealing material had the shape shown in Figure 5. In Figure 5, L=3.5mm, T2=3.5mm, T1=0.3mm (Example 1-1), 0.7mm (Example 1-2), and 1.0mm (Example 1-3).

[0770] <Preparation of sealant material shape 2> (Example 2) A 5cm, 1mm thick sheet of FFKM (hardness A70) was prepared to serve as the core. As a pre-coating treatment, surface cleaning was performed using an atmospheric pressure plasma generator. During this process, dry air at a pressure of 0.4 MPa was used to generate the plasma. After cleaning, a circle with a diameter of 35 mm was applied and drawn on one side (the top surface of the core) of the FFKM sheet using curing composition 1 with an air dispenser. The application conditions were adjusted so that the application width was 3.2 to 3.5 mm and the application thickness was 0.3 mm (Example 2-1), 0.7 mm (Example 2-2), 1.0 mm (Example 2-3), or 1.3 mm (Example 2-4). The sheets were then left to stand at room temperature for 24 hours to cure until the applied liquid was fixed. Subsequently, a circle with a diameter of 35 mm was similarly applied and drawn on the opposite side of the sheet (the underside of the core) using an air dispenser, and then cured at room temperature. At this time, the circles of cured composition 1 applied to each surface perfectly matched in shape across the FFKM sheet. Then, by cutting the FFKM sheet along the edge of the applied circle, a ring-shaped sealing material with an outer diameter of 3.9 cm and an inner diameter of 3.2 cm was obtained. The cross-section of the obtained sealing material had the shape shown in Figure 2. In Figure 2, L=3.5mm, T2=1mm, T1=0.3mm (Example 2-1), 0.7mm (Example 2-2), 1.0mm (Example 2-3), and 1.3mm (Example 2-4).

[0771] (Examples 3-7) In Examples 3 to 7, the cores and curing compositions listed in the table were used, and the same procedure as in Example 2 was followed to prepare each sealing material. The cores used in Examples 3 to 7 are as follows: Example 3: VMQ hardness A70 Example 4: VMQ hardness A50 Example 5-1: NBR hardness A70 Example 5-2: NBR hardness A60 Example 5-3: NBR hardness A50 Example 5-4: NBR hardness A40 Example 6: NBR hardness A70 Example 7: NBR hardness A70

[0772] (Example 8) In Example 8, a sealing material was prepared by performing the same procedure as in Example 2, except that NBR70 was used as the core and curing composition 4 was used as the coating, and a heat treatment at 150°C for 1 hour was performed during curing.

[0773] <Preparation of sealant material shape 3> (Example 9) A core made of FFKM70 with the shape shown in Figure 13 was prepared. The outer diameter of the core was 38 mm and the inner diameter was 31 mm, and the cross-sectional dimensions were T2=1.2 mm, T3=0.8 mm, L=3.5 mm, and L3=2.5 mm. The curing composition 1 was applied to the core (upper surface of the core) using an air dispenser and cured at room temperature for 24 hours. At this time, the application width (length L of the sealant in Figure 13) of the curing composition 1 was 3.5 mm and the thickness (T1) was 1.6 mm. The same coating was applied to the underside of the core, and a ring-shaped sealing material was obtained by curing it at room temperature.

[0774] <Preparation of sealant shape 4> (Example 10) A core made of FFKM70 with the shape shown in Figure 16 was prepared. The outer diameter of the core was 38 mm and the inner diameter was 31 mm, and the cross-sectional dimensions were T2=1.2 mm, T3=0.5 mm, L=3.5 mm, and L1=3.1 mm. The curing composition 1 was applied to the core (upper surface of the core) using an air dispenser and cured at room temperature for 24 hours. At this time, the application width (length L1 of the sealant in Figure 16) of the curing composition 1 was 3.5 mm and the thickness (T1) was 1.7 mm. The same coating was applied to the underside of the core, and a ring-shaped sealing material was obtained by curing it at room temperature.

[0775] (Comparative example) An evaluation similar to that of the example was performed using an O-ring having the same material hardness as the core used in the creation of the example.

[0776] <Evaluation Criteria> [Evaluation of the core and covering] The following conditions were used to evaluate the physical properties of the various materials in the core and covering parts.

[0777] (Tg) A strip sample measuring 0.5 mm thick, 1 mm wide, and 20 mm long was prepared, and the storage modulus was measured using dynamic viscoelasticity measurement (DMA, instrument name DMA1, manufactured by Mettler) at a cooling rate of 5°C / min, a frequency of 1 Hz, and tensile conditions. From the storage modulus plots obtained at each temperature, the point at which the material transitions from the glassy region to the rubbery region (the point at which the storage modulus begins to decrease) was read and defined as Tg.

[0778] (Shore hardness) Shore hardness measurements were performed using a Shore hardness tester A (Shore hardness tester type D, manufactured by Polymer Instruments Co., Ltd.). Each sample was evaluated with n=3, and the average value was used as the result.

[0779] [Evaluation of sealing materials] The leak temperature and compression set of the obtained sealing material were evaluated under the following conditions.

[0780] (Evaluation of leak temperature) • Description of the evaluation device (HELIOT900, manufactured by ULVAC, Inc.): A leak evaluation jig consisting of two metal plates was prepared. One of the metal plates was connected to a vacuum pump and a helium leak detector via a metal tube. The sealing material created between the metal plates was placed so that its covering surface was in contact with the metal plates, and the metal plates were fastened together with bolts so that the sealing material was compressed to a predetermined degree (10% or 25%). The space separated by a metal plate and sealing material is reduced to a vacuum by a pump. By flowing helium gas outside the leak evaluation jig, the amount of helium leaking into the interior through the sealing material was evaluated. • Evaluation of leak temperature; The evaluation apparatus was assembled in a temperature-controlled cooling tank, and the sealant was placed at room temperature to achieve a predetermined compression ratio. The pump was switched on, and the system was depressurized for 30 minutes to stabilize, confirming that the He permeation rate remained constant. In this state, the temperature of the cooling tank was lowered to the cooling capacity temperature - 75°C. When the sealant loses its sealing function due to cooling, the helium inflow rate increases rapidly. This temperature was defined as the leak temperature and evaluated. Compression ratio (%) = Compression amount / Original seal height • Evaluation of compression set: A sealing material was placed between two metal plates in an evaluation jig, with the covering portion in contact with the metal plates. The metal plates were then bolted together to compress and fix the sealing material by 25%. The jig was then placed in a -70°C freezer and maintained its shape for 500 hours. After 500 hours, the sealing material was removed, allowed to return to room temperature, and its thickness was measured. The compression set was then evaluated using the following formula. Compression set (%) = Change before and after testing / Compression amount × 100

[0781] [Table 5]

[0782] [Table 6]

[0783] [Table 7]

[0784] [Table 8]

[0785] [Table 9]

[0786] [Table 10]

[0787] [Table 11]

[0788] [Table 12]

[0789] Examples 1 (Examples 1-1 to 1-3) exhibited low permanent compression strain similar to Comparative Example 1, but with a lower leak temperature than Comparative Example 1. It was found that the sealing material of Example 1 had superior sealing performance at low temperatures compared to the sealing material of Comparative Example 1. In Example 2 (Examples 2-1 to 2-4), the core had the same composition as in Example 1. Even with a different core shape, the leak temperature was lower while maintaining the same permanent compression strain as in Example 1. It was found that the sealing material in Example 2 had superior sealing performance at lower temperatures. Examples 3 (Examples 3-1 to 3-4) used a rubber core with a different composition than that used in Example 2. Even with a different core composition, the leak temperature remained low. Furthermore, Example 3 exhibited a lower leak temperature than Comparative Example 2, and its permanent compression strain was also lower than that of Comparative Example 2. The sealing material in Example 3 demonstrated excellent sealing performance at low temperatures. Examples 4 (Examples 4-1 to 4-4) used a core with a different Shore hardness than Example 3. The sealing material of Example 4 had a lower leak temperature than Comparative Example 3, and the permanent compression strain was also lower than that of Comparative Example 2. It was found that the sealing material of Example 4 had excellent sealing performance at low temperatures. Examples 5 (Examples 5-1 to 5-4) used a rubber core with a different configuration than Examples 3 and 4. While Example 5 exhibited a low permanent compression set similar to Comparative Examples 4 (4-1 to 4-2), it also showed a lower leak temperature than Comparative Example 4. The sealing material of Example 5 was found to have superior sealing performance at low temperatures compared to the sealing material of Comparative Example 4. Examples 6-8 provided coatings with different configurations. It was found that even with different coating configurations, low leak temperatures and low permanent compression strain values ​​could be achieved. Examples 6-8 demonstrated excellent sealing performance at low temperatures. Examples 9 and 10 differ in the shape of the core from Example 1. As shown in Examples 9 and 10, it was found that even with a different core shape, it is possible to have a low leak temperature and a low permanent compression strain. Examples 9 and 10 were found to have excellent sealing performance at low temperatures. [Industrial applicability]

[0790] The present invention can be suitably used as a sealing material that exhibits good sealing performance at low temperatures. [Explanation of symbols]

[0791] 1,1A,1B,1C,1D,1E,1F,1G,1H,1I,1J,1K,1L,1M,1N,1P,1Q,1R,1S Sealant 2,2A,2B,2C,2D,2E,2F,2G,2H,2I,2J,2K,2L,2M,2N,2P,2Q,2R,2S Core part 20a innermost 20b outermost 21F, 22F, 23F, 24F protrusions 21G, 22G circular section 25F,23G connection part 21P,22P,21Q,22Q end face 3,3A,3B,3C,3D,3E,3F,3G,3H,3I,3J,3K,3L,3M,3N,3P,3Q,3R,3S 1st covering part 4 openings L,L1,L2,L21,L22,L3,L31,L32 length T, T1, T2, T3, T4 Thickness TE Diameter of the inner opening θ1, θ2, θ3 angles

Claims

1. It has a core portion and a first covering portion located on the surface of the core portion, A sealing material wherein the glass transition temperature of the material constituting the first coating portion is lower than the glass transition temperature or softening temperature of the material constituting the core portion.

2. The sealing material according to claim 1, wherein the glass transition temperature of the material constituting the core is 0°C or lower.

3. The sealing material according to claim 1 or 2, wherein the glass transition temperature of the first coating portion is -30°C or lower.

4. The sealing material according to claim 1 or 2, wherein the Shore hardness HS1 of the first coating portion at room temperature is in relation to the Shore hardness HS2 of the core portion at room temperature, in the relationship HS1 ≤ HS2 + 20.

5. The sealing material according to claim 1 or 2, wherein the material constituting the first covering portion is resin.

6. The sealing material is the sealing material according to claim 1 or 2, wherein the sealing material has an opening.

7. The sealing material is annular, as described in claim 1 or 2.

8. The sealing material according to claim 1 or 2, wherein the first covering portion has a convex shape with respect to the sealing direction of the sealing material.

9. The sealing material according to claim 7, wherein the core portion is circular or elliptical in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring.

10. The sealing material according to claim 7, wherein in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring, the core portion has a straight portion and / or a concave portion at the contact portion with the first covering portion.

11. The sealing material according to claim 7, wherein the core portion includes a rectangle in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring.

12. The sealing material according to claim 7, wherein, in a cross section perpendicular to the annular plane and perpendicular to the circumferential direction of the ring, the thickness of at least one end region of the core is greater than the thickness of the region other than the end region.

13. The sealing material according to claim 1 or 2, wherein the core portion is at least one selected from the group consisting of fluororesin, silicone compound, nitrile rubber, and fluororubber.

14. The sealing material according to claim 1 or 2, wherein the maximum thickness of the core portion is in the range of 0.05 to 10 mm.

15. The sealing material according to claim 1 or 2, wherein the first coating portion has at least one selected from the group consisting of perfluoropolyether, fluorosilicone, diphenylsiloxane, methylphenylsiloxane, and dimethylsiloxane.

16. The sealing material according to claim 1 or 2, wherein the first coating portion is formed of at least one of the group consisting of a perfluoropolyether group-containing silane compound, a carbon-carbon double bond-containing perfluoropolyether compound, a hydrosilyl compound, and a polysiloxane compound.

17. The sealing material according to claim 1 or 2, wherein the thickness of the first covering portion is in the range of 0.3 to 3 mm.

18. The sealing material according to claim 1 or 2, wherein the core portion and the first covering portion have different colors.

19. Furthermore, the sealing material according to claim 1 or 2, further comprising an adhesive layer that bonded the core portion and the first covering portion together.

20. Furthermore, the core portion has a roughened surface on the contact surface with the first covering portion, as described in claim 1 or 2.

21. Furthermore, the sealing material according to claim 1 or 2, having a second covering portion located on the first covering portion.

22. A sealing material according to claim 1 or 2, which is for low-temperature sealing.

23. A method for manufacturing a sealing material according to claim 1, A coating step of applying a composition containing the material constituting the first coating portion onto the core portion. A method for manufacturing a sealing material, including the method described above.

24. A coating step is performed on the core portion by performing at least one selected from the group consisting of plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment, and then applying a composition containing the material constituting the first coating portion. A method for manufacturing a sealing material according to claim 23, including the method described in claim 23.

25. A molding process in which a composition containing the material constituting the first covering portion is injected onto the core portion provided in the molding frame and cast into shape. A method for manufacturing a sealing material according to claim 23 or 24, including the method described above.

26. A method for manufacturing a sealing material according to claim 1, A first sheet molding process in which the material constituting the core is formed into a sheet to form the first sheet, A second sheet molding process in which the material constituting the first covering portion is formed into a sheet to form a second sheet, and Sheet placement process: The first sheet and the second sheet are placed on top of each other in the molding frame. A method for manufacturing a sealing material, including the method described above.

27. After the arrangement step, a curing step is performed in which at least one of the first sheet and the second sheet is cured by heat treatment or light irradiation treatment. A method for manufacturing a sealing material according to claim 26, including the method described in claim 26.

28. After the hardening process, a processing step to shape the material into the desired form. A method for manufacturing a sealing material according to claim 27, including the method described in claim 27.

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