Seal material

Abstract

To provide a seal material having good sealing properties at low temperatures.SOLUTION: A seal material comprising a core part and a first coating part positioned on a surface of the core part, wherein a glass transition point of a material constituting the first coating part is lower than a glass transition point or a softening temperature of a material constituting the core part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] Conventionally, some perfluoropolyether groups (PFPE groups) have been known to have excellent low-temperature properties and have been used in application-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 application applications and / or sealing applications. Attempts have also been made to add PFPE group-containing compounds to fluoroelastomers to improve their low-temperature properties (Patent Document 3). However, sufficient low-temperature properties were not obtained, and there were problems with the perfluoropolyether component added before curing segregating or bleeding out onto the surface. Furthermore, in order to improve the chemical resistance of rubber, attempts have been made to coat other types of rubber with PFPE group-containing compositions (Patent Document 4), which has been found to have a certain effect on 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 Application Laid-Open No. 2005-126542 [Patent Document 4] Japanese Patent Application Laid-Open No. 2008-214566 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when conventional PFPE group-containing compounds are used alone, their mechanical properties are insufficient for use as stationary seal moldings such as O-rings, and no study has been conducted on the low-temperature properties of the coated articles.

[0005] Therefore, an object of the present disclosure is to provide a sealing material that has good sealing properties at low temperatures. [Means for solving the problem]

[0006] The present disclosure includes the following aspects. [1] a core portion and a first covering portion located on a surface of the core portion, A sealing material in which the glass transition point of the material constituting the first covering portion is lower than the glass transition point 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 point of the first covering 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 covering portion at room temperature and the Shore hardness HS2 of the core portion at room temperature satisfy the relationship HS1≦HS2+20. [5] The sealing material according to any one of [1] to [4], wherein the material constituting the first covering portion is a resin. [6] The sealing material according to any one of [1] to [5], which has an opening. [7] The sealing material according to any one of [1] to [6], wherein the sealing material is annular. [8] The sealing material according to any one of [1] to [7], wherein the first covering portion has a convex shape in the sealing direction of the sealing material. [9] [7] 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] [7] A sealing material according to the present invention, 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] [7] 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 includes a rectangle.

[12] [7] A sealing material described in [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 portion is greater than the thickness of the region other than the end region.

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

[12] , wherein the core is at least one selected from the group consisting of fluororesin, silicone compound, nitrile rubber, and fluororubber.

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

[13] , wherein the maximum thickness of the core 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 covering portion includes at least one selected from the group consisting of perfluoropolyether, fluorosilicone, diphenylsiloxane, methylphenylsiloxane, and dimethylsiloxane.

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

[15] , wherein the first coating portion is formed from 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.

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

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

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

[18] , further comprising an adhesive layer that bonds the core portion and the first covering portion together.

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

[19] , further comprising a roughened surface portion on the surface of the core that comes into contact with the first covering portion. [twenty one] The sealing material according to any one of [1] to

[20] , further comprising a second covering portion located on the first covering portion. [twenty two] The sealing material according to any one of [1] to

[21] , which is for low-temperature sealing. [twenty three] A method for producing a sealing material according to any one of [1] to

[22] , a coating step of coating a composition containing a material constituting the first coating portion onto the core portion; A method for producing a sealing material, comprising: [twenty four] a coating step of performing at least one treatment selected from the group consisting of plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment on the core, and then coating a composition containing a material that constitutes the first coating portion; The method for producing the sealing material according to

[23] , comprising: [twenty five] a molding step of injecting a composition containing a material constituting the first covering portion onto the core portion provided in a molding frame and performing cast molding; The method for producing the sealing material according to

[23] or

[24] , comprising:

[26] A method for producing a sealing material according to any one of [1] to

[22] , a first sheet molding step of molding a material constituting the core into a sheet shape to form a first sheet; a second sheet molding step of molding the material constituting the first covering portion into a sheet shape to form a second sheet; a sheet arranging step of arranging the first sheet and the second sheet in a stacked manner in a molding frame; A method for producing a sealing material, comprising:

[27] a curing step of curing at least one of the first sheet and the second sheet by heat treatment or light irradiation treatment after the disposing step. The method for producing the sealing material according to

[26] , comprising:

[28] A processing step of processing the hardened product into a desired shape. The method for producing the sealing material according to

[27] , comprising: [Effects of the Invention]

[0007] According to the present disclosure, a sealing material having good sealing properties at low temperatures is provided. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 2 is a plan view of the sealing material of the first embodiment. [Figure 2] 2 is a cross-sectional view of the sealing material shown in FIG. 1 taken along line II-II. [Figure 3] FIG. 10 is a plan view of a sealing material according to a first modified example. [Figure 4] 4 is a cross-sectional view of the sealing material of FIG. 3 taken along line IV-IV. [Figure 5] FIG. 10 is a cross-sectional view of a portion of a sealing material according to a second modification. [Figure 6] FIG. 11 is a cross-sectional view of a portion of a sealing material according to a third modification. [Figure 7] FIG. 10 is a cross-sectional view of a portion of a sealing material according to a fourth modification. [Figure 8] FIG. 13 is a cross-sectional view of a portion of a sealing material according to a fifth modified example. [Figure 9] FIG. 13 is a cross-sectional view of a portion of a sealing material according to a sixth modification. [Figure 10] FIG. 13 is a cross-sectional view of a portion of a sealing material according to a seventh modification. [Figure 11] FIG. 13 is a cross-sectional view of a portion of a sealing material according to Modification 8. [Figure 12] FIG. 13 is a cross-sectional view of a portion of a sealing material according to a ninth modification. [Figure 13] FIG. 23 is a cross-sectional view of a portion of a sealing material according to a tenth modification. [Figure 14] FIG. 20 is a cross-sectional view of a portion of a sealing material according to an eleventh modification. [Figure 15] FIG. 23 is a cross-sectional view of a portion of a sealing material according to a twelfth modification. [Figure 16] FIG. 23 is a cross-sectional view of a portion of a sealing material according to a thirteenth modification. [Figure 17] FIG. 20 is a cross-sectional view of a portion of a sealing material according to a fourteenth modification. [Figure 18] FIG. 20 is a cross-sectional view of a portion of a sealing material according to a fifteenth modification. [Figure 19] FIG. 20 is a cross-sectional view of a portion of a sealing material according to a sixteenth modification. [Figure 20] FIG. 10 is a plan view of a sealing material according to a second embodiment. [Figure 21] 21 is a cross-sectional view taken along the line XXI-XXI in FIG. 20. [Figure 22] FIG. 10 is a plan view of a sealing material according to a third embodiment. [Figure 23] 23 is a cross-sectional view of the sealing material shown in FIG. 22 taken along the line XXIII-XXIII. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a sealing material according to one embodiment of the present disclosure will be described in detail with reference to the illustrated embodiments. Note that the drawings include some schematic views and may not reflect actual dimensions or proportions.

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

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

[0012] Here, Tg is a value that can be obtained by dynamic mechanical analysis (DMA), and corresponds to the temperature at which the transition from the glass region to the glass transition region (rubber transition region) occurs in the DMA storage modulus curve.

[0013] By providing the first covering portion 3 on the core portion 2, which has a Tg lower than the Tg or softening temperature of the material that constitutes the core portion 2, it is possible to provide a sealing material 1 that has excellent sealing properties at low temperatures.

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

[0015] In this specification, the upper surface of the sealing material refers to the area of ​​the sealing material seen from the forward Z direction, and the lower surface of the sealing material refers to the area of ​​the sealing material seen from the reverse Z direction. The inner and outer surfaces of the sealing material refer to the surfaces including the inner and outer peripheries of the sealing material in a plan view (viewed from the Z direction), and are areas seen from a direction perpendicular to the Z axis. In this specification, the term "cross section" refers to a cross section perpendicular to the annular plane of the sealing material and perpendicular to the circumferential direction of the ring. In other words, when the sealing material is annular, the term "cross section" refers to a cross section taken along 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, such as semiconductor manufacturing equipment, automobiles, refrigerators, oil drilling equipment, and semiconductor manufacturing-related equipment.

[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 peripheral surface located on the opening 4 side and an outer peripheral surface facing the inner peripheral surface. The axis of the inner peripheral surface and the axis of the outer peripheral surface may be at the same location. The annular shape is sufficient as long as it surrounds the inner region (i.e., the opening) without interruption, and the shapes of the inner and outer peripheries do not have to be circular and may be any shape, such as rectangular or polygonal. In the sealing material, the center side is the inside, and the direction opposite the center side is the outside.

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

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

[0021] In one embodiment, in a cross-sectional view of the sealing material 1, the maximum value of the length L of the sealing material 1 in the X direction is greater than the maximum value of the thickness T in the Z direction. By adopting such an embodiment, it is expected that the sealing material will be less likely to twist when compressed.

[0022] In one embodiment, in a cross-sectional view of the sealing material 1, the maximum value of the length L of the sealing material 1 in the X direction is smaller than the maximum value of the thickness T in the Z direction. By adopting such an embodiment, the area of ​​the jig for attaching the sealing material can be reduced, making it possible to mount the sealing material on narrower components.

[0023] (core) The sealing material 1 of the present disclosure has a core 2. Using the core 2 can reinforce the sealing material 1 and improve the mechanical properties of the sealing material 1. Furthermore, depending on the material of the core 2, the sealing performance of the sealing material 1 can be improved, and the amount of the first coating used can be reduced, which can improve chemical wear and / or physical wear.

[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 peripheral surface and an outer peripheral surface that face each other. On the inner peripheral surface, the core portion 2 and the first covering portion 3 are smoothly continuous, i.e., there is no step at the boundary between them. On the outer peripheral surface, the core portion 2 and the first covering portion 3 are smoothly continuous, i.e., there is no step at the boundary between them.

[0025] As shown in FIG. 2, the core 2 has a pair of surfaces facing each other in the Z direction and a pair of surfaces facing each other in the X direction that connect the ends of these surfaces. The pair of surfaces facing each other in the X direction respectively constitute a part of the inner peripheral surface and the outer peripheral surface of the sealing material 1. The pair of surfaces facing each other in the Z direction are perpendicular to the pair of surfaces facing each other that connect the ends of these surfaces. In other words, the core 2 has a rectangular cross section. Note that each surface of the core 2 does not have to be completely flat in cross section, and may have a slightly curved surface, an uneven surface, or the like. The core 2 may also have a shape other than rectangular.

[0026] In this specification, the upper surface of the core refers to the area of ​​the core that can be seen from the forward Z direction when looking at only the core, and the lower surface of the core refers to the area of ​​the core that can be seen from the reverse Z direction when looking at only the core. Unless otherwise specified, the inner surface of the core is the surface that is in contact with the opening, and the outer surface of the core is the surface that is located outside the core and corresponds to the inner surface.

[0027] The maximum length L of the core 2 in the cross section (the maximum length L of the sealing material 1 in the cross section, i.e., the maximum length of the core 2 in the X direction) may be, for example, in the range of 0.5 to 10 mm, specifically in the range of 1 to 5 mm. The maximum thickness T2 of the core 2 may be, for example, in the range of 0.05 to 3 mm, 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 greater, specifically A50 or greater. The upper limit of the Shore hardness HS2 of the core 2 at room temperature is not particularly limited, but is, for example, D90 or less. 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, such as a durometer type A or type D manufactured by Kobunshi Keiki Co., Ltd. Here, room temperature is not particularly limited, but refers to, for example, a temperature range of 20 to 30°C. The Shore hardness is a value measured in accordance with JIS K6253-2012. In this specification, Shore hardness D40 is considered to be equivalent to A90.

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

[0030] The rough surface portion refers to a portion having a surface roughness (Ra) of 0.1 μm or more.

[0031] The rough surface 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 cured product. The core 2 is not particularly limited, but may be made 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 metal 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 lower. 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 ceramic include alumina, zirconia, and silicon carbide.

[0037] When the core 2 is made of an organic material, the Tg of the material that constitutes the core 2 is, for example, 0°C or lower. The lower limit of the Tg of the material that constitutes the core 2 is not particularly limited, but is, for example, -80°C or higher. Since the Tg of the material that constitutes the first covering portion 3 is lower than the Tg of the core, the temperature durability of the sealing material 1 is improved. This allows the sealing material 1 to be used at low temperatures.

[0038] The organic material may be, for example, at least one selected from the group consisting of a fluororesin silicone compound, 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, for example, in the range of D30 to D90, or in the range of D40 to D80.

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

[0041] The nitrile rubber may contain a third component such as, for example, a copolymer of butadiene and acrylonitrile, isoprene, etc. Examples of the nitrile rubber include NBR70, NBR60, NBR50, and NBR40. The Shore hardness HS2 of the nitrile rubber at room temperature may be, for example, 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 perfluororubbers include tetrafluoroethylene-perfluorovinyl ether compounds (FFKM) and tetrafluoroethylene-propylene compounds (FEPM). Examples of fluororubbers other than perfluororubbers include tetrafluoroethylene-vinylidene fluoride compounds. Each of these rubbers may contain a comonomer component. Examples of fluororubbers include Kalrez and Viton from DuPont; Dupra and Daiel from Daikin Industries, Ltd.; Tecnoflon from Solvay; and Aflas series from AGC. The Shore hardness HS2 of the fluororubber at room temperature may be, for example, 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 2 is made of a silicone compound, which improves the processability and flexibility of the core 2.

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

[0046] In one embodiment, the core 2 is made of metal or ceramic. In this embodiment, the core 2 has high (large) rigidity and is less susceptible to dimensional changes due to temperature fluctuations (good dimensional stability).

[0047] (First covering part) The sealing material 1 of the present 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, as shown in Figure 2, there are two first covering portions 3. As shown in Figure 1, the first covering portion 3 is annular when viewed from the Z direction. By having the first covering portion 3, sealing properties are exhibited at low temperatures.

[0048] As shown in FIG. 2, the two first covering portions 3 have a convex shape in the sealing direction of the sealing material 1. The sealing direction is the direction in which the sealed portion of the sealed member exists, i.e., the direction in which the sealing member is pressed against the sealed member. One first covering portion 3 has a convex surface in the forward Z direction in cross section, and the other first covering portion 3 has a convex surface in the reverse Z direction in cross section. The two first covering portions 3 bulge in an arc shape in the forward Z direction and the reverse Z direction, respectively. In cross section, the center is thickest, the thickness gradually decreases toward both ends, and the end ends are thinnest. The first covering portion 3 does not exist on the surfaces that are on the inner and outer surfaces of the core portion 2. Note that the first covering portion 3 may have other shapes.

[0049] The Shore hardness HS1 of the first covering portion 3 at room temperature is, for example, A30 or more, specifically A40 or more. The upper limit of the Shore hardness of the first covering portion 3 is not particularly limited, but is, for example, D40 or less. The Shore hardness HS1 of the first covering portion 3 at room temperature may be, for example, 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 for the core portion 2. As the Shore hardness decreases, the core becomes 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 and the Shore hardness HS2 of the core portion 2 at room temperature satisfy the relationship HS1≦HS2+20. This allows the coating portion to be sufficiently compressed during crimping, generating a reaction force and achieving good low-temperature sealing properties even with a smaller amount of compression. When comparing HS1 and HS2, it is preferable to compare HS1 and HS2 obtained using the same hardness tester (e.g., measuring HS1 and HS2 with a Type A hardness tester or a Type D hardness tester). When comparing HS1 and HS2 obtained using different hardness testers (e.g., measuring HS1 with a Type A hardness tester and HS2 with a Type D hardness tester), HS1 and HS2 are compared herein assuming that Shore hardness D40 corresponds to A90. 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 value of the 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, and 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. When the thickness T1 is in the above range, the first covering portion 3 has good sealing properties at low temperatures and is less likely to suffer from problems such as twisting.

[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] Note that when the thickness T2 of the core portion 2 is large, the thickness T1 of the first covering portion 3 may be small. For example, when 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 the 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 may be, for example, in the range of 1 to 49%, and specifically, in the range of 10 to 45%.

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

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

[0058] The first covering portion 3 and the core portion 2 may be different colors. For example, the core portion is white and the first covering portion is black. With the above configuration, it is possible to check the degree of coverage of the core portion.

[0059] The color difference ΔE between the first covering portion 3 and the core portion 2 is preferably at least 1, more preferably at least 3, even more preferably at least 5, and particularly preferably at least 10. As the color difference value increases, it becomes easier to visually distinguish between the first covering portion 3 and the core portion 2, making it easier to check the proper surface when installing the sealing material 1 and to determine whether installation is improper.

[0060] The Tg of the first covering 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. The above configuration allows the sealing material 1 to be used at lower temperatures, improving the maintenance of sealing properties. The lower limit of the Tg of the first covering portion 3 is not particularly limited, but is, for example, −130° C. or higher.

[0061] The first covering portion 3 may contain a resin, and is made of, for example, a resin.

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

[0063] The first coating portion 3 can 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) The PFPE group-containing silane compound has, for example, a structure represented by the following formula: [ka]

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

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

[0067] Each q is independently 0 or 1. In one embodiment, q is 0. In another embodiment, q is 1.

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

[0069] Above Rf 2 is preferably C substituted by one or more fluorine atoms 1-6 is an alkylene group, more preferably C 1-6 A perfluoroalkylene group, more preferably C 1-3 It is a perfluoroalkylene group.

[0070] Above C 1-6 The perfluoroalkylene group may be a straight chain or a branched chain, and is preferably a straight chain or branched chain C 1-3 A perfluoroalkylene group, more preferably a linear C 1-3 A perfluoroalkylene group, specifically, -CF2-, -CF2CF2-, or -CF2CF2CF2-.

[0071] R Fis independently in each occurrence a divalent fluoropolyether group (PFPE group). A divalent fluorine atom-containing group refers to a divalent organic group in which at least a portion of the hydrogen atoms are substituted with fluorine atoms.

[0072] As used herein, the term "organic group" refers to a group containing a carbon atom. For example, a divalent organic group refers to a divalent group containing carbon. The divalent organic group is not particularly limited, but examples thereof include divalent groups in which 1 to 9 hydrogen atoms have been eliminated from a hydrocarbon group. The divalent organic group is not particularly limited, but examples thereof include divalent groups in which one hydrogen atom has been eliminated from a hydrocarbon group.

[0073] Preferably, R F are each independently a group R represented by the following formula (f1): F11 , a group R represented by the following formula (f2) F12 , R represented by the following formula (f3) F13 , or R represented by the following formula (f4) F14 is. -(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 - is independently a repeating unit having a straight chain or a branched chain. -OC h R c 2h-2 Each - is independently a repeating unit having a ring structure.

[0076] R c are each independently a hydrogen atom, a fluorine atom, or a chlorine atom, provided that R F11 In this case, at least one R c is a fluorine atom.

[0077] R c is preferably a fluorine atom.

[0078] Each j is independently an integer of 1 to 6.

[0079] Each h is independently an integer of 1 to 7.

[0080] j1 is an integer equal to or greater than 0. h1 is an integer equal to or greater than 0. However, the sum of j1 and h1 is at least 1, and preferably at least 2. The order of the repeating units enclosed in parentheses with j1 or h1 is arbitrary in the formula.

[0081] In one embodiment, -(OC j R c 2j ) j1 -teeth, -(OC6F12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3R Fa 6) d1 -(OC2F4) e1 -(OCF2) f1 - It is expressed as: a1, b1, c1, d1, e1, and f1 each independently represent an integer of 0 to 200, the sum of a1, b1, c1, d1, e1, and f1 is 1 or more, and the order of the repeating units enclosed in parentheses with a1, b1, c1, d1, e1, or f1 is arbitrary in the formula. R as above F11 By having this, it is possible to form a surface treatment layer having water repellency, oil repellency, chemical resistance, abrasion resistance, and the like. In this specification, R F11 The left side is -Rf 2 p -, and the right side is -O q -, respectively. Also, the above formula preferably has at least one fluorine atom.

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

[0083] Above R Fa is preferably a hydrogen atom or a fluorine atom, and more preferably a fluorine atom.

[0084] Preferably, a1, b1, c1, d1, e1 and f1 may each independently be an integer of 0 to 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, 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 a straight or branched chain include the following structure: -(OCF 12 )- may be -(OCF2CF2CF2CF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2CF2CF2)-, -(OCF2CF(CF3)CF2CF2CF2)-, -(OCF2CF2CF(CF3)CF2CF2)-, -(OCF2CF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF2CF(CF3))-, etc. 10 )- may be -(OCF2CF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2CF2)-, -(OCF2CF(CF3)CF2CF2)-, -(OCF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF(CF3)CF2)-, -(OCF2CF2CF2CF(CF3))-, etc. -(OC4F8)- may be -(OCF2CF2CF2CF2)-, -(OCF(CF3)CF2CF2)-, -(OCF2CF(CF3)CF2)-, -(OC(CF3)2CF2)-, -(OCF2C(CF3)2)-, -(OCF(CF3)CF(CF3))-, -(OCF(C2F5)CF2)-, and -(OCF2CF(C2F5))-. -(OC3F6)- (i.e., in the above formula, R Fa is a fluorine atom) may be any of -(OCFCFCF)-, -(OCF(CF)CF)-, and -(OCFCF(CF))-. -(OCF)- may be any of -(OCFCF)- and -(OCF(CF))-.

[0087] Preferably, the repeating unit is linear. This structure reduces Tg. The repeating unit may contain a branched chain, for example, as long as it does not affect low-temperature properties.

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

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

[0090] In one embodiment, R F11 is independently in each occurrence a group represented by any one of the following formulas (f11) to (f16). -(OC3F6) d1 -(OC2F4) e1 - (f11) [wherein d1 is an integer of 1 to 200; and e1 is 0 or 1, preferably 1.] -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - (f12) [In the formula, c1 and d1 each independently represent an integer of 0 or more and 30 or less, and e1 and f1 each independently represent an integer of 1 or more and 200 or less; The sum of c1, d1, e1 and f1 is greater than or equal to 2; The order of occurrence of each repeating unit enclosed in parentheses with the subscript c1, d1, e1, or f1 in the formula is arbitrary.]; -(R 71 -R 72 ) g1 - (f13) [In the formula, R 71 is OCF2 or OC2F4; R 72 are OC2F4, OC3F6, OC4F8, OC5F10 and OC6F 12 or a combination of two or three groups independently selected from these groups; g1 is an integer from 2 to 100. -(R 71 -R 72 ) g1 -R r -(R 72’ -R 71’ ) g1’ - (f14) [In the formula, R 71 is OCF2 or OC2F4; R 72 are OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 or a combination of two or three groups independently selected from these groups; R 71’ is OCF2 or OC2F4; R 72’ are OC2F4, OC3F6, OC4F8, OC5F 10 and OC6F 12 or a combination of two or three groups independently selected from these groups; g1 is an integer from 2 to 100; g1' is an integer from 2 to 100; R r teeth, [ka] (In the formula, * indicates the bonding position.) ]; -(OC6F 12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - (f15) [In the formula, e1 is an integer of 1 or more and 200 or less, a1, b1, c1, d1, and f1 are each independently an integer of 0 or more and 200 or less, the sum of a1, b1, c1, d1, e1, and f1 is at least 1, and the order of the repeating units 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 of 1 or more and 200 or less, a1, b1, c1, d1, and e1 are each independently an integer of 0 or more and 200 or less, the sum of a1, b1, c1, d1, e1, and f1 is at least 1, and the order 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 of 5 to 200, more preferably 10 to 100, even more preferably 15 to 50, for example, an integer of 25 to 35. In the above formula (f11), (OC3F6) is preferably a group represented by (OCF2CF2CF2), more preferably a group represented by (OCF2CF2CF2). In the above formula (f11), (OC2F4) is preferably a group represented by (OCF2CF2).

[0092] In the formula (f12), e1 and f1 are each independently an integer of preferably 5 or more and 200 or less, more preferably 10 to 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 aspect, the formula (f12) is preferably -(OCF2CF2CF2CF2) c1 -(OCF2CF2CF2) d1 -(OCF2CF2) e1-(OCF2) f1 In another embodiment, formula (f12) is a group represented by -(OC2F4) e1 -(OCF2) f1 It may also be a group represented by the formula -.

[0093] In the above formula (f13), R 71 is preferably OC2F4. In the above (f13), R 72 is preferably a group selected from OC2F4, OC3F6 and OC4F8, or a combination of two or three groups independently selected from these groups, 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, and examples thereof include -OC2F4OC3F6-, -OC2F4OC4F8-, -OC3F6OC2F4-, -OC3F6OC3F6-, -OC3F6OC4F8-, -OC4F8OC4F8-, -OC4F8OC3F6-, -OC4F8OC2F4-, -OC Examples include 2F4OC2F4OC3F6-, -OC2F4OC2F4OC4F8-, -OC2F4OC3F6OC2F4-, -OC2F4OC3F6OC3F6-, -OC2F4OC4F8OC2F4-, -OC3F6OC2F4OC2F4-, -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 may be either a straight chain or a branched chain, and is preferably a straight chain. In this embodiment, the above formula (f13) is preferably -(OC2F4-OC3F6) g1 -or-(OC2F4-OC4F8) g1 -It is.

[0094] In the above formula (f14), R 71 , R 72and g1 have the same meanings as those in the formula (f13) above, and have the same embodiments. 71’ , R 72’ and g1′ are R 71 , R 72 and g1 and have the same meaning and aspects. r is preferably [ka] [In the formula, * indicates the bonding position.] and more preferably [ka] [In the formula, * indicates the bonding position.] is.

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

[0096] In the above formula (f15), R F11 The repeating unit at the terminal portion may be -(OCF2CF2OCF2CF2CF2)-.

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

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

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

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

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

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

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

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

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

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

[0107] Above R F11 In the formula, the ratio of e1 to f1 (hereinafter referred to as "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, still more preferably 0.2 or more and less than 0.9, and particularly preferably 0.2 or more and 0.85 or less. When the e / f ratio is within the above range, the stability of the obtained fluorine-containing compound is improved. Here, f1 is an integer of 1 or more.

[0108] In one embodiment, R F11 In the formula, the e / f ratio is preferably 1.0 or more, for example, 1.1 or more, or may be 1.3 or more. F11In the formula, 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 the formula, the e / f ratio is, for example, 1.0 to 10.0, 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 the formula, the e / f ratio may be in the range of 1.0 to 1.2.

[0110] In one embodiment, R F11 In the formula, 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 the formula, the e / f ratio is preferably 0.2 or more, more preferably 0.3 or more, even more preferably 0.4 or more, and particularly preferably 0.5 or more. F11 In the formula, the e / f ratio is, for example, 0.2 or more and less than 0.9, 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 the formula, d1 is preferably an integer of 1 or more, more preferably 3 or more, and even more preferably 6 or more, and may be 200 or less, 120 or less, 60 or less, or 54 or less. In this embodiment, d1 may be 1 to 200, 3 to 120, 3 to 60, or 6 to 60.

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

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

[0114] Above R F11 The number average molecular weight of the R moiety 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. F11 The number average molecular weight of 19 The value is measured by F-NMR.

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

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

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

[0118] R c1 are each independently a hydrogen atom, a fluorine atom, or a chlorine atom. R d are each independently an arylene group optionally substituted with a fluorine atom. However, R d or R c1 At least one of these is a fluorine atom. The arylene group is a divalent organic group obtained by removing two hydrogen atoms from the ring structure of an aromatic hydrocarbon group. An example of an arylene group is a phenylene group.

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

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

[0121] In one embodiment, R d (Specifically, R d At least some of the hydrogen atoms in R d is an arylene group substituted with a fluorine atom.

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

[0123] In one embodiment, R F12 In the formula (I), the arylene group is a phenylene group. The phenylene group may have a bonding position at any of the ortho, meta, or para positions. In one embodiment, the phenylene group has a bonding position at the para position.

[0124] In one embodiment, R F12In the formula (I), all hydrogen atoms of the phenylene group are substituted with fluorine atoms.

[0125] s is an integer from 1 to 10.

[0126] s1 is an integer of 0 or more, and s2 is an integer of 0 or more. The sum of s1 and s2 is 1 or more. The repeating units enclosed in parentheses with s1 or s2 may be present in any order in the formula.

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

[0128] ·R F13 Rf 4 are each independently -(C s R c1 2s ) s1 - or -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 -(C s R c1 2s ) s1 -and-(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - has the same meaning as above.

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

[0130] Each Q is independently a group represented by formula (f31) or formula (f32). [ka]

[0131] R 1 are each independently a hydrogen atom, C 1-10 is an alkyl group (for example, a methyl group, an ethyl group, or an n-propyl group) or an aryl group (for example, a phenyl group), and is preferably a hydrogen atom.

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

[0133] X 31 In the divalent hydrocarbon group, oxygen atoms can be inserted as -O- and nitrogen atoms can be inserted as -NR 1 -(R 1 is as defined above).

[0134] X 31In the divalent hydrocarbon radical, silicon atoms can be present as linear or cyclic organosiloxane-containing groups or organosilylene groups, for example, as shown below. [ka]

[0135] n is an integer of 0 to 10, typically an integer of 0 to 5.

[0136] R 111 are each independently an alkyl group or an aryl group. Examples of the alkyl group include a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group, a pentyl group, a neopentyl group, a hexyl group, a heptyl group, and an octyl group, and particularly representative examples are alkyl groups having 1 to 6 carbon atoms, such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a tert-butyl group, a pentyl group, a neopentyl group, and a hexyl group. Examples of the aryl group include aryl groups having 6 to 8 carbon atoms, such as a phenyl group, a tolyl group, and a xylyl group.

[0137] R 112 are each independently an alkylene group or an arylene group. Examples of the alkylene group include alkylene groups having 1 to 10 carbon atoms, such as methylene, ethylene, propylene, butylene, pentylene, hexylene, heptylene, octylene, nonylene, and decylene. Examples of the arylene group include arylene groups having 6 to 10 carbon atoms, such as phenylene, tolylene, xylylene, and naphthylene.

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

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

[0140] Specific examples of the group 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 - or -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 -(C s R c12s ) s1 -and-(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - has the same meaning as above. [ka]

[0141] ·R F14 Rf 4 are each independently -(C s R c1 2s ) s1 - or -(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 -(C s R c1 2s ) s1 -and-(OC j R c 2j ) j1 -(OC h R c 2h-2 ) h1 - has the same meaning as above.

[0142] X 121 ~X 124 are each independently H, F, OH, or -OSi(OR 121 )3. The three R 121 are each independently an alkyl group having 1 to 4 carbon atoms.

[0143] X a1 is -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 CX121 X 122 Binds to.

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

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

[0146] ·Formula (A1): R 11 each independently represents 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 are each independently 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, an ethyl group, and a propyl group.

[0148] R 13 each independently represents a hydroxyl group or a hydrolyzable group, the hydrolyzable group being as defined above.

[0149] R 14 each 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 ) units are independently an integer of 0 to 3, preferably 1 to 3, and more preferably 3.

[0151] For example, at least two n1s are integers of 1 to 3. That is, all n1s are not 0 at the same time. That is, in the formula, at least two n1s are R 13 That is, in formula (A1), n1 is 1 or more and -SiR 13 n1 R 14 3-n1 Structure (i.e., -SiR 13 There are at least two

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

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

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

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

[0156] Z 3 Each of Z independently represents an oxygen atom or a divalent organic group. 3 The structure shown is SiR 71 p1 R 72 q1 R 73 r1Combine with.

[0157] Z 3 is preferably a divalent organic group, and the Si atom (R a does not include those that form a siloxane bond with the silicon atom to which it is bonded.

[0158] Z 3 is preferably C 1-6 Alkylene group, -(CH2) g -O-(CH2) h - (wherein g is an integer of 0 to 6, and h is an integer of 0 to 6) or -(CH2) i -phenylene-(CH2) j - (wherein i is an integer of 0 to 6, and j is an integer of 0 to 6). For example, g is an integer of 0 to 6, and h is an integer of 1 to 6. In another example, g is an integer of 1 to 6, and h is an integer of 0 to 6. For example, i is an integer of 0 to 6, and j is an integer of 1 to 6. In another example, i is an integer of 1 to 6, and j is an integer of 0 to 6. More preferably, Z 3 is C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 In one embodiment, these groups are unsubstituted. From the viewpoint of particularly good ultraviolet resistance, the above Z 3 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, more preferably in the range of 1 to 3. The alkylene group is as described above.

[0159] R 71 are each independently -Z 3’ -SiR 71’ p1’ R 72’q1’ R 73’ r1’ is.

[0160] Z 3’ Each of Z independently represents an oxygen atom or a divalent organic group. 3’ The structure shown is SiR 71’ p1’ R 72’ q1’ R 73’ r1’ Combine with.

[0161] Z 3’ is preferably a divalent organic group, and the Si atom (R 71 does not include those that form a siloxane bond with the silicon atom to which it is bonded.

[0162] Z 3’ is preferably C 1-6 Alkylene group, -(CH2) g’ -O-(CH2) h’ - (wherein g' is an integer of 0 to 6, and h' is an integer of 0 to 6) or -(CH2) i’ -phenylene-(CH2) j’ - (wherein i' is an integer of 0 to 6, and j is an integer of 0 to 6). For example, g' is an integer of 0 to 6, and h' is an integer of 1 to 6. In another example, g' is an integer of 1 to 6, and h' is an integer of 0 to 6. For example, i' is an integer of 0 to 6, and j' is an integer of 1 to 6. In another example, i' is an integer of 1 to 6, and j' is an integer of 0 to 6. More preferably, Z 3’ is C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 In one embodiment, these groups are unsubstituted. From the viewpoint of particularly good ultraviolet resistance, the above Z 3is 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, more preferably in the range of 1 to 3. The alkylene group is as described above.

[0163] R 71’ are each independently -Z 3” -SiR 72” q1” R 73” r1” is.

[0164] Z 3” Each of Z independently represents an oxygen atom or a divalent organic group. 3” The structure shown is SiR 72” q1” R 73” r1” Combine with.

[0165] Z 3” is preferably a divalent organic group, and the Si atom (R 71’ does not include those that form a siloxane bond with the silicon atom to which it is bonded.

[0166] Z 3” is preferably C 1-6 Alkylene group, -(CH2) g” -O-(CH2) h” - (wherein g" is an integer of 0 to 6, and h" is an integer of 0 to 6), or -(CH2) i” -phenylene-(CH2) j” - (wherein i" is an integer of 0 to 6, and j" is an integer of 0 to 6). For example, g" is an integer of 0 to 6, and h" is an integer of 1 to 6. In another example, g" is an integer of 1 to 6, and h" is an integer of 0 to 6. For example, i" is an integer of 0 to 6, and j" is an integer of 1 to 6. In another example, i" is an integer of 1 to 6, and j" is an integer of 0 to 6. More preferably, Z 3” is C 1-3It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 In one embodiment, these groups are unsubstituted. From the viewpoint of particularly good ultraviolet resistance, the above Z 3 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, more preferably in the range of 1 to 3. The alkylene group is as described above.

[0167] R 72” each independently represents a hydroxyl group or a hydrolyzable group. The term "hydrolyzable group" has the same meaning as defined above.

[0168] Preferably, R 72” is -OR (wherein R is a substituted or unsubstituted C 1-3 It is more preferable that the alkyl group is a methyl group.

[0169] R 73” are each independently 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 independently an integer of 0 to 3; each r1" is independently an integer of 0 to 3. 3” -R 72” q1” R 73” r1” ) the sum of q1'' and r1'' is 3.

[0171] In one embodiment, R 71’In the above formula, 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.

[0172] R 72’ each independently represents a hydroxyl group or a hydrolyzable group. The term "hydrolyzable group" has the same meaning as defined above.

[0173] Preferably, R 72’ is -OR (wherein R is a substituted or unsubstituted C 1-3 It is more preferable that the alkyl group is a methyl group.

[0174] R 73’ are each independently 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, each p1' is independently an integer of 0 to 3; each q1' is independently an integer of 0 to 3; and each r1' is independently an integer of 0 to 3. 3’ -SiR 71’ p1’ R 72’ q1’ R 73’ r1’ ), 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 the formula, the above 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 independently represents a hydroxyl group or a hydrolyzable group. The term "hydrolyzable group" has the same meaning as defined above.

[0178] Preferably, R 72is -OR (wherein R is a substituted or unsubstituted C 1-3 It is more preferable that the alkyl group is a methyl group.

[0179] R 73 are each independently 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] Each p1 is independently an integer of 0 to 3; each q1 is independently an integer of 0 to 3; and each r1 is independently an integer of 0 to 3, provided that (-Z 3 -SiR 71 p1 R 72 q1 R 73 r1 ), the sum of p1, q1 and r1 is 3.

[0181] In one embodiment, R a In the formula, 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.

[0182] R b each independently represents a hydroxyl group or a hydrolyzable group.

[0183] R b is preferably a hydroxyl group, -OR, -OCOR, -ON=C(R)2, -N(R)2, -NHR, or halogen (in these formulas, R represents a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms), more preferably -OR. R includes unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. 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 one generated by hydrolysis of a hydrolyzable group. More preferably, R bis -OR (wherein R is a substituted or unsubstituted C 1-3 It is more preferable that the alkyl group is a methyl group.

[0184] R c are each independently 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, each k1 is independently an integer of 0 to 3; each l1 is independently an integer of 0 to 3; and each m1 is independently an integer of 0 to 3, provided that (SiR a k1 R b l1 R c m1 ), the sum of k1, l1 and m1 is 3.

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

[0187] ·Formula (A4) R d are each independently -Z 4 -CR 81 p2 R 82 q2 R 83 r2 Represents.

[0188] Z 4 each independently represents an oxygen atom or a divalent organic group. 4 The structure written as follows is CR 81 p2 R 82 q2 R 83 r2 Combine with.

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

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

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

[0192] Z 4 is preferably C 1-6 Alkylene group, -(CH2) g1 -O-(CH2) h1 - (wherein g1 is an integer of 0 to 6, and h1 is an integer of 0 to 6) or -(CH2) i1 -phenylene-(CH2) j1 - (wherein i1 is an integer of 0 to 6, and j1 is an integer of 0 to 6). For example, g1 is an integer of 0 to 6, and h1 is an integer of 1 to 6. In another example, g1 is an integer of 1 to 6, and h1 is an integer of 0 to 6. For example, i1 is an integer of 0 to 6, and j1 is an integer of 1 to 6. In another example, i1 is an integer of 1 to 6, and j1 is an integer of 0 to 6. Z 4 is preferably C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 In one embodiment, these groups are unsubstituted.

[0193] In a preferred embodiment, Z 4 is C 1-6 Alkylene group or -(CH2) i1 -phenylene-(CH2) j1 -, preferably -phenylene-(CH2) j1 -It is. Z 4 is such a group, the light resistance, particularly the ultraviolet resistance, can be improved.

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

[0195] R 81 are each independently -Z 4’ -CR 82’ q2’ R 83’ r2’ is.

[0196] Z 4’ are each independently a single bond, an oxygen atom, or a divalent organic group. 4’ The structure written as (CR 82’ q2’ R 83’ r2’ )

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

[0198] Z 4’ is preferably C 1-6 Alkylene group, -(CH2) g1’ -O-(CH2) h1’ - (wherein g1' is an integer of 0 to 6, and h1' is an integer of 0 to 6) or -(CH2) i1’ -phenylene-(CH2) j1’ - (wherein i1' is an integer of 0 to 6, and j1' is an integer of 0 to 6). For example, g1' is an integer of 0 to 6, and h1' is an integer of 1 to 6. In another example, g1' is an integer of 1 to 6, and h1' is an integer of 0 to 6. For example, i1' is an integer of 0 to 6, and j1' is an integer of 1 to 6. In another example, i1' is an integer of 1 to 6, and j1' is an integer of 0 to 6. Z 4’ is preferably C 1-3 It is an alkylene group. These groups include, for example, fluorine atoms, C 1-6Alkyl group, C 2-6 Alkenyl groups, and C 2-6 In one embodiment, these groups are unsubstituted.

[0199] In a preferred embodiment, Z 4’ is C 1-6 Alkylene group or -(CH2) i1’ -phenylene-(CH2) j1’ -, preferably -phenylene-(CH2) j1’ -It is. Z 4’ is such a group, the light resistance, particularly the ultraviolet resistance, can be improved.

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

[0201] R 82’ are each independently -Y-SiR 84 n2 R 85 3-n2 is.

[0202] Each Y is independently a single bond, an oxygen atom, or a divalent organic group. In the following, the structure described as Y is such that the right side is (SiR 84 n2 R 85 3-n2 )

[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 - (wherein g2 is an integer of 0 to 6, and h2 is an integer of 0 to 6) or -(CH2) i2 -phenylene-(CH2) j2 - (wherein i2 is an integer of 0 to 6, and j2 is an integer of 0 to 6). For example, g2 is an integer of 0 to 6, and h2 is an integer of 1 to 6. In another example, g2 is an integer of 1 to 6, and h2 is an integer of 0 to 6. For example, i2 is an integer of 0 to 6, and j2 is an integer of 1 to 6. In another example, i2 is an integer of 1 to 6, and j2 is an integer of 0 to 6. Such C 1-6 The alkylene group may be straight-chain or branched, but is preferably straight-chain. These groups include, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, 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 When Y is such a group, light resistance, particularly ultraviolet resistance, can be improved.

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

[0209] R 84 are each independently a hydroxyl group or a hydrolyzable group.

[0210] R 84 are preferably each independently a hydrolyzable group.

[0211] R 84 are preferably each independently -OR h1 , -OCOR h1 , -ON=CR h1 2, -NR h1 2, -NHR h1 , —NCO, or halogen (wherein R h1 is a substituted or unsubstituted C 1-4 alkyl group), and more preferably -OR h1 (i.e., an alkoxy group). h1 Examples of R include unsubstituted alkyl groups such as methyl, ethyl, propyl, isopropyl, n-butyl, and isobutyl; and substituted alkyl groups such as chloromethyl. 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 is an ethyl group.

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

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

[0214] n2 is (SiR 84 n2 R 85 3-n2 ) units are each independently an integer of 0 to 3. However, in the terminal portion of formula (A4), n2 is 1 to 3 (SiR 84 n2 R 85 3-n2 In other words, there are at least two Si atoms to which hydroxyl groups or hydrolyzable groups are bonded in the terminal portion of formula (A4).

[0215] n2 is (SiR 84 n2 R 85 3-n2 ) units are each independently an integer of preferably 1 to 3, more preferably 2 to 3, and even more preferably 3.

[0216] R 83’ are each independently a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such monovalent organic groups are monovalent organic groups excluding the above-mentioned hydrolyzable groups.

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

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

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

[0220] Each q2' is independently an integer of 0 to 3; each r2' is independently an integer of 0 to 3. The sum of q2' and r2' is (CR 82’ q2’ R 83’ r2’ ) units, it is 3.

[0221] q2' is (CR 82’ q2’ R 83’ r2’ ) units are each independently an integer of preferably 1 to 3, more preferably 2 to 3, and even more preferably 3.

[0222] R 82 are each independently -Y-SiR 84 n2 R 85 3-n2 Such -Y-SiR 84 n2 R 85 3-n2 is the above R 82’ This has the same meaning as the description in

[0223] R 83 are each independently a hydrogen atom, a hydroxyl group, or a monovalent organic group. Such monovalent organic groups are monovalent organic groups excluding the above-mentioned hydrolyzable groups.

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

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

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

[0227] Each p2 is independently an integer of 0 to 3, each q2 is independently an integer of 0 to 3, and each r2 is independently an integer of 0 to 3. The sum of p2, q2, and r2 is (CR 81 p2 R 82 q2 R 83 r2 ) units, 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 ) units may each independently be an integer of 1 to 3, an integer of 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 ) units are each independently an integer of 1 to 3, preferably an integer of 2 or 3, and more preferably 3.

[0231] In one embodiment, p2 is 0 and q2 is (CR 81 p2 R 82 q2 R 83 r2 ) units are each independently an integer of 1 to 3, preferably an integer of 2 to 3, and more preferably 3.

[0232] R e are each independently -Y-SiR 84 n2 R 85 3-n2 This represents -Y-SiR84 n2 R 85 3-n2 is the above R 82’ This has the same meaning as the description in

[0233] R f are each independently a hydrogen atom, a hydroxyl group, or a lower alkyl group. f are each independently 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 is a hydroxyl group.

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

[0236] Each k2 is independently an integer of 0 to 3; each l2 is independently an integer of 0 to 3; and each m2 is independently an integer of 0 to 3, provided that 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 ) units are present at each terminal portion of formula (A4) by 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.

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

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

[0243] In a preferred embodiment, in formula (A4), R e When present, at least one, preferably all, R e In the formula, n2 is an integer of 1 to 3, preferably 2 or 3, and 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 are each 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 meanings as above.

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

[0247] Above Z 5 are each independently a single bond, an oxygen atom, or a divalent organic group. 5 The structure written as 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 )

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

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

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

[0251] Z 5is preferably C 1-6 Alkylene group, -(CH2) g2’ -O-(CH2) h2’ - (wherein g2' is an integer of 0 to 6, and h2' is an integer of 0 to 6) or -(CH2) i2’ -phenylene-(CH2) j2’ - (wherein i2' is an integer of 0 to 6, and j2' is an integer of 0 to 6). For example, g2' is an integer of 0 to 6, and h2' is an integer of 1 to 6. In another example, g2' is an integer of 1 to 6, and h2' is an integer of 0 to 6. For example, i2' is an integer of 0 to 6, and j2' is an integer of 1 to 6. In another example, i2' is an integer of 1 to 6, and j2' is an integer of 0 to 6. Such C 1-6 The alkylene group may be straight-chain or branched, but is preferably straight-chain. These groups may contain, for example, fluorine atoms, C 1-6 Alkyl group, C 2-6 Alkenyl groups, and C 2-6 It may be substituted by one or more substituents selected from alkynyl groups, but is preferably unsubstituted.

[0252] In one embodiment, Z 5 is C 1-6 Alkylene group or -(CH2) i2’ -phenylene-(CH2) j2’ -, preferably -phenylene-(CH2) j2’ -It is. Z 5 is such a group, the light resistance, particularly the ultraviolet resistance, can be improved.

[0253] In another embodiment, the Z 5 is C 1-3 In one embodiment, Z is an alkylene group. 5 can be -CH2CH2CH2-. In another embodiment, Z 5 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 is a group 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 2nd Round c , or -SiR a 3 and R a -Z 3 -SiR 72 q1 R 73 r1 and Z 3 is 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 2nd Round f , or -CR e 3 and R e -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 -Z 5 -SiR 13 n1 R 14 3-n1 and Z 5 is 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] Each α1 is independently an integer of 1 to 9, and X A In formula (A), α1 can vary depending on the valence of X A The value is the valence of X minus 1. A When is a single bond, α1 is 1.

[0261] X A Each of X independently represents a single bond or a divalent to decavalent organic group. A In the compound represented by formula (A), the perfluoro(poly)ether moiety (i.e., -R F1 - moiety) and R, a silane moiety that provides bonding ability to the substrate. Si Therefore, the X A may be a single bond or any organic group as long as the compound represented by formula (A) can exist stably. A The group written as follows is R F1 The group represented by is R Si each bonded to a group.

[0262] X A is preferably a divalent to heptavalent, more preferably a divalent to tetravalent, and even more preferably a divalent organic group.

[0263] In one embodiment, X A 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 R is a divalent group containing -, -O-, -S-, or -SO2-. 1 are each independently a hydrogen atom, C 1-10 is an alkyl group (for example, a methyl group, an ethyl group, or an n-propyl group) or an aryl group (for example, a phenyl group), and is preferably a hydrogen atom.

[0265] X A Examples of the compound include, but are not limited to, the compound represented by the following formula: -(R 31 ) p’ -(X a ) q’ - [In formula: R 31 is a single bond, -(CH2) s’ - or an o-, m- or p-phenylene group, preferably -(CH2) s’ - and s' is an integer of 1 to 20, preferably an integer of 1 to 6, more preferably an integer of 1 to 3, and even more preferably 1 or 2; X a is -(X b ) l’ - represents X b are each independently -O-, -C(O)O-, or -NR 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 are each independently a phenyl group, C 1-6 Alkyl group or C 1-6 represents an alkoxy group, preferably a phenyl group or C 1-6 is an alkyl group, more preferably a methyl group; R 1 are each independently a hydrogen atom, C 1-6 represents an alkyl group (preferably a methyl group) or a phenyl group, m' in each occurrence is independently an integer from 1 to 100, preferably an integer from 1 to 20; n', in each occurrence, is independently an integer from 1 to 20, preferably an integer from 1 to 6, more preferably an integer from 1 to 3; l' is an integer of 1 to 10, preferably an integer of 1 to 5, more preferably an integer of 1 to 3, p' is 0 or 1; q' is 0 or 1, wherein at least one of p' and q' is 1, and the repeating units enclosed in parentheses with p' or q' may be present in any order. Here, R 31 and X a (typically R 31 and X a hydrogen atoms) are fluorine atoms, C 1-3 Alkyl groups 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 XA is -(R 31 ) p’ -(X a ) q’ -R 32 -R 32 is a single bond, -(CH2) t’ - or an o-, m- or p-phenylene group, preferably -(CH2) t’ t' is an integer of 1 to 20, preferably an integer of 2 to 6, and more preferably an integer of 2 to 3. Here, R 32 (typically R 32 The hydrogen atoms in 1-3 Alkyl groups and C 1-3 It may be substituted with one or more substituents selected from fluoroalkyl groups.

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

[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 or C 1-6 It is an alkylene group.

[0272] X 12 In or C 1-6 The alkylene group may be a straight chain or a branched chain. 1-6 The alkylene group is linear. 1-6 The alkylene group is a branched chain. 1-6 The alkylene group is preferably C 1-4 Alkylene groups, more preferably C 1-3 It is an alkylene group.

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

[0274] X A In one aspect, single bond, C 1-20 Alkylene groups, such as C 1-6 Alkylene group, C 1-3 an alkylene group, -X c -, -(CH2) s’ -X c -, -(CH2) s’ -X c -(CH2) t’ -, -X c -(CH2) t’ - where s' and t' are as defined 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- [In the formula, R 33 , R 1 and m' are as defined above; and u' is an integer of 1 to 20, preferably an integer of 2 to 6, and more preferably an integer of 2 or 3.

[0276] X c teeth, -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 be expressed as:

[0277] Preferably, the above X A teeth, single bond, C 1-20 an 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' are defined as above, and v is an integer of 1 to 20, preferably an integer of 2 to 6, and more preferably an integer of 2 to 3.] is.

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

[0279] Above X A The group is a fluorine atom, C 1-3 Alkyl groups and C 1-3 Fluoroalkyl groups (preferably C 1-3 perfluoroalkyl groups).

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

[0281] In another embodiment, X A Examples of groups include the following: [ka] [ka] [In the formula, R 41 are each independently 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 42are each independently a hydrogen atom, C 1-6 or C 1-6 represents an alkoxy group, preferably a methyl group or a methoxy group, more preferably a methyl group. is a group selected from E is -(CH2) ne - (ne is an integer between 2 and 6), D is bonded to the PFPE in the molecular main chain, and E is bonded to the group opposite the PFPE.

[0282] 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 means phenyl), -CON(CH3)-(CH2)6-, -CON(Ph)-(CH2)6- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6- (wherein Ph means 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)zSi(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-、<s -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-、 It should be noted that there seems to be a misspelling in the original text where "z" appears in the formula in line ID=7. It should probably be "2". This translation has been made based on the provided text while keeping the misspelling as it is.-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 means phenyl), -CON(CH3)-(CH2)6-, -CON(Ph)-(CH2)6- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6- (wherein Ph means 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:

[0284] Among the above, X is more preferable. 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 means phenyl), -CON(CH3)-(CH2)6-, -CON(Ph)-(CH2)6- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)3-, -CF2-CON(Ph)-(CH2)3- (wherein Ph means phenyl), -CF2-CON(CH3)-(CH2)6-, -CF2-CON(Ph)-(CH2)6- (wherein Ph means phenyl), -CONH-(CH2)2NH(CH2)3-, -CONH-(CH2)6NH(CH2)3-, is.

[0285] In one embodiment, X A is X e’ represents X e’ represents a single bond, an alkylene group having 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 -R 51 and R 52 R each independently represents a single bond or an alkylene group having 1 to 6 carbon atoms, and is preferably a single bond or an alkylene group having 1 to 3 carbon atoms. 1 has the same meaning as above. The alkylene group is substituted or unsubstituted, preferably unsubstituted. Examples of the substituent on the alkylene group include a halogen atom, preferably a fluorine atom. The alkylene group is linear or branched, preferably linear.

[0286] In a preferred embodiment, X e’ teeth, single bond, C 1-20 Alkylene groups, such as C 1-6 Alkylene group, C 1-3 an 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 are each independently as defined above. As described above, the alkylene group may be substituted or unsubstituted, and examples of the substituent on the alkylene group include a halogen atom, preferably a fluorine atom. It could be.

[0287] In the above, X e’ is preferably C 1-6 Alkylene group, preferably C 1-3 an 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-, where R 1 , R 51 and R 52 are the same as above.

[0288] In this embodiment, X e’ Specific examples include, for example, single bond, C 1-6 an 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- Examples include:

[0289] Among the above list, 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- Examples include:

[0290] In another embodiment, X A is the formula:-(R 16 ) x -(CFR 17 ) y -(CH2) z In the formula, x, y, and z each independently represent an integer of 0 to 10, the sum of x, y, and z is 1 or more, and the order of the repeating units enclosed in parentheses in the formula is arbitrary.

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

[0292] The "divalent polar group" is not particularly limited, but examples thereof include -C(O)-, -C(=NR 9 )-, and C(O)NR 1 -(wherein R 1 has the same meaning as above).

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

[0294] In this embodiment, X A is preferably of the formula: -(O) x -(CF2) y -(CH2) z - (wherein x, y and z are as defined above, and the order of occurrence of the repeating units enclosed in parentheses in the formula is arbitrary).

[0295] The above formula: -(O) x -(CF2) y -(CH2) z Examples of the group represented by - include -(O) x’ -(CH2) z” -O-[(CH2) z’’’ -O-] z”” , and (O) x’ -(CF2) y” -(CH2) z” -O-[(CH2) z’’’ -O-] z”” (wherein x' is 0 or 1, y", z", and z'" are each independently an integer of 1 to 10, and z"" is 0 or 1). These groups are preferably those in which the left end is R F1 Attach to the side.

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

[0297] Above R 20 each independently represents a fluorine atom or a lower fluoroalkyl group, where 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 or a pentafluoroethyl group, and even more preferably a trifluoromethyl group.

[0298] The above e's are each independently 0 or 1.

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

[0300] In yet another embodiment, X A Examples of groups include the following: [ka] [In the formula, R 41 are each independently 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 one of T's may be one of the following groups attached 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 are each independently a hydrogen atom, C 1-6 or C 1-6 represents an alkoxy group, preferably a methyl group or a methoxy group, more preferably a methyl group.] Some of the other T's are bonded to the opposite group to the PFPE on the molecular backbone -(CH2) n” -(n" is an integer from 2 to 6), and if present, the remaining T's are each independently a methyl group, a phenyl group, or C 1-6 It may be an alkoxy group, a radical scavenger group, or an ultraviolet absorbing group. A In the group shown asF1 Based on this, the right side is R Si each bonded to a group.

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

[0302] The ultraviolet absorbing group is not particularly limited as long as it can absorb ultraviolet light, and examples thereof include residues of benzotriazoles, hydroxybenzophenones, esters of 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 include: [ka] Examples include:

[0304] In this embodiment, X A can be a trivalent to decavalent organic group.

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

[0306] The 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 alkenyl group include a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a butenyl group, a hexenyl group, and an acryl group, and particularly a vinyl group or an allyl group.

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

[0308] The carbon-carbon double bond-containing PFPE compound has, for example, a structure represented by the following formula: [ka]

[0309] X A Groups and R F1 The groups have the same meanings as above.

[0310] β1 is independently an integer of 1 to 9, and X A In formula (A), β1 can vary depending on the valence of X A The value is the valence of X minus 1. A When is a single bond, β1 is 1.

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

[0312] R 21 -X A -and-A 1 (R 22 -CH=CH2) β11 R 23 n21-β11 R 21are, for example, each independently a single bond, —C(═O)NR 1 It is represented by - or -O-.

[0313] R 1 is as defined above. Preferably, R 1 is a hydrogen atom.

[0314] A 1 are atoms that form n21 branched structures.

[0315] A 1 is, for example, a silicon atom, a carbon atom or a nitrogen atom.

[0316] A 1 When R is a silicon atom or a carbon atom, n21 is 3. 21 is an integer between 1 and 3. 22 -CH=CH2 and an integer of 0 to 2 R 23 That is, β11 is an integer of 1 to 3.

[0317] A 1 When R is a nitrogen atom, n21 is 2. 21 is one or two -R 22 -CH=CH2 and 0 or 1 R 23 That is, β11 is 1 or 2.

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

[0319] β11 may be 1, 2, or 3.

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

[0321] R 22 When 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 The divalent organic group can be a group represented by the left side of the formula (i.e., R 24 side), A 1 and combine.

[0322] In the above aspect, the R 24 R is a single bond or a divalent hydrocarbon group having 1 to 15 carbon atoms, which may contain an ether bond. 24 The hydrocarbon group in the formula (I) can be, for example, an alkylene group or an alkylene group which may contain ether oxygen. The alkylene group may be substituted or unsubstituted as described above.

[0323] In one embodiment, the R 24 is a single bond. 24 is a divalent hydrocarbon group, preferably an alkylene group in which at least a portion of the hydrogen atoms are substituted with fluorine atoms, and examples thereof include -CFH-, -CF2-, -(CF2)2-, and -(CF2)3-, and specifically, -CF2-.

[0324] Above -R 22 -CH=CH2 is, for example, -CH=CH2, -R 24 -C(=O)-CH=CH2, -R 24 It can be -OC(=O)-CH=CH2.

[0325] In the above aspect, the R 25is —CH2— or an 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 is 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 is a hydrolyzable group, a hydroxyl group, or a monovalent organic group, where the monovalent organic group does not include a hydrolyzable group.

[0328] The monovalent organic group is C 1-10 Examples include alkylene groups, such as a methyl group and an ethyl group.

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

[0330] In the above formulae, p1, q1, r1, and s1 are each independently an integer of 1 to 200, and the sum of p1, q1, r1, and s1 in each formula is an integer of 20 to 450. qs1 and qs2 are each independently an integer of 0 to 222, and the sum of qs1 and qs2 is an integer of 8 to 222. The order of the repeating units enclosed in parentheses in the formulae is arbitrary. Me means a methyl group, and Et means an ethyl group.

[0331] Hydrosilyl compounds The hydrosilyl compound has two or more silicon-bonded hydrogen atoms (Si-H) in one molecule. The hydrosilyl compound can function as a crosslinker or chain extender for the carbon-carbon double bond-containing PFPE compound. The inclusion of the hydrosilyl compound can improve the physical properties (e.g., tensile strength or modulus of elasticity) of the first coating portion 3.

[0332] The Si—H group is preferably present at the molecular chain terminal of the hydrosilyl compound.

[0333] The hydrosilyl compound preferably has two or more silicon atoms having Si—H bonds in one molecule.

[0334] The hydrosilyl compound preferably has, in its molecular structure, one or more fluorine-containing groups, such as a monovalent perfluoroalkyl group, a monovalent perfluorooxyalkyl group, a divalent perfluoroalkylene group, or a divalent perfluorooxyalkylene group. 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 part 3, and can also improve the uniformity of the first coating part 3.

[0335] The number of carbon atoms in the 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 monovalent perfluorooxyalkyl group is Rf 3 -R F -O q Preferably, the R F and q have the same meanings as above.

[0337] R F is preferably of the formula: -(OC6F 12 ) a1 -(OC5F 10 ) b1 -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - It is expressed as R F may be linear or branched, but is preferably linear. a1, b1, c1, d1, e1 and f1 are each as defined above.

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

[0339] Preferably, R F is -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 - (wherein c1 and d1 are each independently an integer of 0 to 30, e1 and f1 are each independently an integer of 1 to 200, preferably 5 to 200, more preferably 10 to 200, and the order of occurrence of each repeating unit enclosed in parentheses with the subscript 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 -(wherein e1 and f1 each independently represent an integer of 1 or more and 200 or less, preferably 5 or more and 200 or less, more preferably 10 or more and 200 or less, and the order of occurrence 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 represents independently in each occurrence a chlorine atom, a fluorine atom, or an alkyl group having 1 to 16 carbon atoms which may be substituted by one or more fluorine or chlorine atoms.

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

[0342] Above Rf 3 is preferably a fluorine atom or an alkyl group having 1 to 16 carbon atoms substituted with one or more fluorine atoms, and more preferably CF2H-C 1-15 Fluoroalkylene group or C 1-16 perfluoroalkyl groups, 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, and is preferably a linear or branched perfluoroalkyl group having 1 to 6 carbon atoms, particularly 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 - (wherein e1 and f1 each independently represent an integer of 1 or more and 200 or less, preferably 5 or more and 200 or less, more preferably 10 or more and 200 or less, and the order of occurrence 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 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 divalent perfluorooxyalkylene group is -R F -, preferably represented by -(OC4F8) c1 -(OC3F6) d1 -(OC2F4) e1 -(OCF2) f1 It is more preferable that the perfluorooxyalkyl group is a group represented by the formula: -. c1, d1, e1, and f1 are as defined above. The perfluorooxyalkyl group may be linear or branched, but is preferably linear.

[0347] The fluorine-containing group is preferably a monovalent perfluoroalkyl group or a divalent perfluoroalkylene group. The fluorine-containing group and the silicon atom can be linked via a divalent organic group, which has the same meaning as defined above.

[0348] The divalent organic group may be an alkylene group, an arylene group, or a combination thereof, or may be one in which an ether-bonded oxygen atom, an amide bond, a carbonyl bond, etc. is interposed between these groups. Examples of such divalent organic groups include: -CH2CH2-, -CH2CH2CH2-, -CH2CH2CH2OCH2-, -CH2CH2CH2-NH-CO-, -CH2CH2CH2-N(Ph)-CO- (wherein Ph is a phenyl group), -CH2CH2CH2-N(CH3)-CO-, -CH2CH2CH2-O-CO- The divalent organic group is bonded to a silicon atom on the left side and to a fluorine-containing group on the right side.

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

[0350] Preferably, the hydrosilyl compound does not have an alkoxy group or an epoxy group as a substituent 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 contained in the hydrosilyl compound is not particularly limited, but may usually be 2 to 60, and preferably 3 to 30 or so.

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

[0354] During the ceremony: R F has the same meaning as above (in the following formula, R F The group represented by is bonded to the group represented by Rf at the terminal oxygen atom. Rf, at each occurrence, is as defined above; R k3is independently in each occurrence an alkyl group having 1 to 10 carbon atoms, or OR k7 and preferably a methyl group or an OR k7 an alkoxy group represented by the formula: R k4 is independently in each occurrence a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or OR k7 and preferably a hydrogen atom or an alkoxy group represented by OR k7 and more preferably a hydrogen atom; R k5 is independently in each occurrence a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or OR k7 and preferably a hydrogen atom or an alkoxy group represented by OR k7 and more preferably a hydrogen atom; R k6 each occurrence independently represents a hydrogen atom, a fluorine atom, or an alkylene group in which one or more hydrogen atoms have been replaced by fluorine atoms, preferably a hydrogen atom; R k7 is, independently in each occurrence, an alkyl group having 1 to 10 carbon atoms, preferably an alkylene group having 1 to 6 carbon atoms; The alkylene group in which one or more hydrogen atoms have been substituted with fluorine atoms preferably contains 1 to 8 carbon atoms, and more preferably 1 to 6 carbon atoms; R k8 is -(O-(CH2) γ5 ) γ6 - (where the oxygen atom is -(CR k6 2) γ1 bonded to a group represented by γ1 in each occurrence is independently an integer from 1 to 10, preferably 2 or 3; γ2, in each occurrence, is independently an integer from 1 to 50, preferably 10; γ3 in each occurrence is independently an integer from 1 to 50, preferably an integer from 3 to 5; γ4, in each occurrence, is independently an integer from 1 to 50, preferably an integer from 3 to 5; γ5 is an integer of 1 to 6, preferably 1 to 3, more preferably 1; γ6 is 0 or 1.

[0355] The content of the hydrosilyl compound can be an effective amount for curing the carbon-carbon double bond-containing PFPE compound. The content of the hydrosilyl compound is preferably in the range of 0.5 to 5.0 moles, more preferably 0.8 to 3.0 moles, of silicon-bonded hydrogen atoms (hydrosilyl groups, i.e., SiH groups) contained 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 coated portion 3 can contribute to the formation of a first coated portion 3 having an appropriate degree of crosslinking and can reduce foaming during curing.

[0356] (Polysiloxane compound) Examples of polysiloxane compounds include fluorosilicone, diphenylsiloxane, methylphenylsiloxane, vinylmethylsiloxane, etc. These polysiloxane compounds have better low-temperature properties than general polydimethylsiloxane, and therefore, when used in the first covering part 3, they can exhibit good low-temperature sealing properties.

[0357] The polysiloxane compound may have any specific siloxane unit in the 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 that has an alkenyl group and is cured by a hydrolyl compound and a curing catalyst.

[0358] The polysiloxane compound may be composed of, for example, any 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 represented by Polyorganosiloxane consisting of (b) Formula (II-1):R 6d a61 R 6e b61 (R 6f O) c61 SiO (4-a61-b61-c61) / 2 and has at least one hydrolyzable group and / or hydroxyl group bonded to a silicon atom in the molecule, and has a terminal group -R 6g -SiR 6h A polyorganosiloxane having an average degree of polymerization of 1,000 to 10,000, which consists of an organopolysiloxane blocked with 3, in which siloxane units represented by formula (II-1) account for 3 to 20 mol% of all siloxane units, and in which 0.02 to 0.5 mol% of substituents bonded to silicon atoms are vinyl groups. (c) R on 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 comprising a unit, wherein the content of the aromatic hydrocarbon group in the polyorganosiloxane is 3 mol % or more and 16 mol % or less.

[0359] Below, (a) to (c) are described.

[0360] As used herein, the term "hydrolyzable group" refers to a group that can undergo hydrolysis, i.e., a group that can be eliminated 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; and substituted alkyl groups such as chloromethyl. Among these, alkyl groups, particularly unsubstituted alkyl groups, are preferred, with methyl or ethyl groups being more preferred. The hydroxyl group is not particularly limited, and may be one generated by hydrolysis of a hydrolyzable group. Examples of halogen atoms include fluorine, chlorine, bromine, and iodine atoms, with chlorine being preferred.

[0361] As used herein, the term "hydrocarbon group" refers to a group containing carbon and hydrogen, in which one hydrogen atom has been removed from the molecule. Examples of such hydrocarbon groups include, but are not limited to, 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 "aliphatic hydrocarbon group" may be linear, branched, or cyclic, and may be saturated or unsaturated. The hydrocarbon group may also contain one or more ring structures. The hydrocarbon group may have one or more N, O, S, Si, amide, sulfonyl, siloxane, carbonyl, carbonyloxy, etc., at its terminal or in the molecular chain.

[0362] As used herein, the substituent of the "hydrocarbon group" is not particularly limited, but examples thereof include a halogen atom; a C 1-6 Alkyl group, C 2-6 Alkenyl group, C 2-6 Alkynyl group, C 3-10Cycloalkyl groups, C 3-10 Unsaturated cycloalkyl groups, 5-10 membered heterocyclyl groups, 5-10 membered unsaturated heterocyclyl groups, C 6-10 Examples include one or more groups selected from aryl groups and 5- to 10-membered heteroaryl groups.

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

[0364] In formula (I-2), R 6c are each independently a monovalent hydrocarbon group or a 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); and m61 is 1, 2, or 3.

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

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

[0367] The polyorganosiloxane (a) may have a plurality of vinyl groups, which may be bonded to side chains or to molecular terminals.

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

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

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

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

[0372] a61 is a number from 1.7 to 2.2, preferably a number from 1.8 to 2.1; b61 is a number from 0.01 to 0.2, preferably a number from 0.02 to 0.1; and c61 is a number from 0.0001 to 0.2, preferably a number from 0.0002 to 0.1. a61+b61+c61 is a number that satisfies the range of 1.9 to 2.4, preferably a number that satisfies the range of 1.95 to 2.05. However, the oxygen atom (O) that connects the silicon atom at the molecular chain terminal to the silicon atom adjacent to said silicon atom is a divalent bonding group -R 6g - may be substituted.

[0373] The terminal of the 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 an —Si atom), a vinyl group, and an alkenyl group. 6g is an oxygen atom or C 1-5 is an alkylene group, and R 6h are each independently R 6d , R 6e or R 6f is.

[0374] The molecular structure of the organopolysiloxane is not particularly limited, and may be linear; 6d SiO 3 / 2 Units, R 6e SiO 3 / 2 units, SiO2 units (wherein R 6d and R 6e The group represented by is as defined above.) and the like may be branched; cyclic; or three-dimensional network (resinous), but typically the diorganopolysiloxane is a linear diorganopolysiloxane whose main chain is basically composed of repeating diorganosiloxane units and whose molecular chain is terminally blocked with diorgano(hydroxy)siloxy groups and / or diorgano(organoxy)siloxy groups.

[0375] The viscosity (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 this viscosity is 100 to 1,000,000 mPa·s, the resulting cured silicone rubber will have 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 provides the above-mentioned viscosity range (i.e., the number of repeating diorganosiloxane units that constitute the main chain) corresponds to, for example, about 100 to 2,000, preferably about 200 to 1,500, and more preferably about 300 to 1,300. The degree of polymerization or molecular weight can be determined, for example, as the number-average degree of polymerization (or number-average molecular weight) in terms of polystyrene in gel permeation chromatography (GPC) analysis using toluene or the like as a developing solvent. can be done.

[0376] (c) Polyorganosiloxane Polyorganosiloxane has R at both ends. 6r 3SiO 1 / 2 unit (also called "M unit") and m62 R 6s 2SiO 2 / 2 units (also referred to as "first D units") (where m62 is an integer of 1 or greater). 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 are each independently 1-12 is an unsubstituted or substituted aliphatic hydrocarbon group of the formula 6s are each independently 1-12 or an unsubstituted or substituted aliphatic hydrocarbon group of C 6-10 and the polyorganosiloxane contains at least one alkenyl group directly bonded to a silicon atom (Si atom) in one molecule. In addition, in order to enhance the flexibility of the silicone adhesive composition, polyorgano In the siloxane structure, RSiO 3 / 2 Units (T units) and SiO 4 / 2 It is preferred that the unit (Q unit) is not included.

[0377] The polyorganosiloxane more preferably further comprises m63 R 6t R 6u SiO 2 / 2 units (hereinafter also referred to as "second D units") (where m63 is an integer of 1 or greater). Such polyorganosiloxanes are 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 are each independently 1-12 is an unsubstituted or substituted aliphatic hydrocarbon group of the formula 6t is C 1-12 or an unsubstituted or substituted aliphatic hydrocarbon group of C 6-10 is an unsubstituted or substituted aromatic hydrocarbon group of the formula R 6u is C 6-10 is an unsubstituted or substituted aromatic hydrocarbon group of

[0378] In formula (III-1) and formula (III-2), R 6r and R 6s are each independently 1-12 and unsubstituted or substituted aliphatic hydrocarbon groups such as C 2-8 or an alkenyl group of C 1-12 C is an unsubstituted or substituted monovalent hydrocarbon group that does not contain an aliphatic unsaturated bond. 2-8 Examples of the alkenyl group include a vinyl group, an allyl group, a propenyl group, an isopropenyl group, a butenyl group, a pentenyl group, a hexenyl group, and a cyclohexenyl group. 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; cycloalkyl groups such as cyclopentyl, cyclohexyl, and cycloheptyl; aryl groups such as phenyl, tolyl, xylyl, naphthyl, and biphenylyl; aralkyl groups such as benzyl, phenylethyl, phenylpropyl, and methylbenzyl; and groups in which at least one hydrogen atom bonded to a carbon atom of these groups is substituted with a halogen atom such as fluorine, chlorine, or bromine, or with a cyano group.

[0379] In the M units of the general formulae (III-1) and (III-2), R 6r At least one of the above is more preferably C 2-8 and more preferably C 11 , including vinyl, allyl, propenyl, isopropenyl and butenyl groups. 2-4 In the M units of the general formulae (III-1) and (III-2), R contained in the M units is preferably a lower alkenyl group, and particularly preferably a vinyl group. 6r The remaining two of these are more preferably, independently of each other, C 1-12 and more preferably, C 11 , C 21 , C 31 , C 41 , C 51 , C 61 , C 71 , C 81 , C 91 , C 101 , C 112 , C 121 , C 131 , C 141 , C 151 , C 161 , C 171 , C 181 , C 191 1-3 In other words, in the M units of the general formulae (III-1) and (III-2), R contained in the M units is a lower alkyl group represented by the formula (III-1) and is particularly preferably a methyl group. 6r One of the groups is a vinyl group, and R 6r The remaining two of these are preferably methyl groups. The polyorganosiloxane represented by the general formula (III-1) is particularly preferably vinyl-terminated polydimethylsiloxane.

[0380] In formula (III-2), R 6tis more preferably C 1-12 an unsubstituted or substituted monovalent hydrocarbon group containing no aliphatic unsaturated bonds, or C 6-10 C is an unsubstituted or substituted monovalent aromatic hydrocarbon group. 1-12 The unsubstituted or substituted monovalent hydrocarbon group not containing an aliphatic unsaturated bond includes R 6r and R 6s The same examples as those exemplified as above can be exemplified. 6-10 Examples of the unsubstituted or substituted monovalent aromatic hydrocarbon group include aryl groups such as phenyl, tolyl, xylyl, and naphthyl; aralkyl groups such as benzyl, 2-phenylethyl, and 2-phenylpropyl; and groups in which at least one hydrogen atom bonded to a carbon atom of these groups has been substituted with a halogen atom such as fluorine, chlorine, or bromine, or a cyano group. 6t is more preferably an aryl group including a phenyl group, a tolyl group, a xylyl group, and a naphthyl group, and particularly preferably a phenyl group.

[0381] In the above general formula (III-2), R 6u is more preferably C 6-10 C is an unsubstituted or substituted monovalent aromatic hydrocarbon group. 6-10 The unsubstituted or substituted monovalent aromatic hydrocarbon group is R 6t In the above general formula (III-2), R 6u is more preferably an aryl group including a phenyl group, a tolyl group, a xylyl group, and a naphthyl group, and particularly preferably a phenyl group. 6t and R 6u and are preferably the same substituents. The polyorganosiloxane represented by the above general formula (III-2) is particularly preferably a vinyl-terminated diphenylsiloxane-dimethylsiloxane copolymer.

[0382] The content of the aromatic hydrocarbon group in the polyorganosiloxane represented by the general formula (III-2) is 3 mol% or more and 16 mol% or less, more preferably 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 of 1 or greater, and m63 is an integer of 1 or greater.

[0384] The polyorganosiloxane preferably consists of a single type of polyorganosiloxane. "Consisting of a single type of polyorganosiloxane" means that all of the polyorganosiloxanes constituting the silicone adhesive composition are those having the R 6r ,R 6s ,R 6t ,R 6u It means that each of the substituents has a uniquely defined molecular structure, and R 6r ,R 6s ,R 6t ,R 6u This means that the polyorganosiloxane is not a mixture of polyorganosiloxanes in which all or any of the substituents have different molecular structures.

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

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

[0387] In one embodiment, the silicone compound has (c) R 6r 3SiO 1 / 2 Units and m62 R 6s 2SiO 2 / 2 Units and m63 R 6t R 6u SiO 2 / 2 The polyorganosiloxane is formed from a composition containing 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.

[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 containing a carbon-carbon double bond-containing PFPE compound and a hydrosilyl compound.

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

[0391] The sealing material 1 may further include 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 portion 3, and bonds the core 2 and the first covering portion 3 together, thereby improving the adhesive strength between the core 2 and the first covering portion 3.

[0393] For the adhesive layer, for example, a silane coupling agent such as aminopropyltrimethoxysilane, glycidylpropyltrimethoxysilane, or 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 refers to the average value of the thickness distance of the adhesive layer measured at three points using a microscope when observing a cross section of the sealing material 1.

[0395] The second covering portion is located at least on the first covering portion 3. By providing the second covering portion, it is possible to protect the first covering portion 3. Note that the second covering portion does not have to cover the entire first covering portion 3. In other words, a part of the first covering portion 3 may be exposed.

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

[0397] The second covering portion can be made of, for example, a resin such as perfluoroalkoxyalkane (PFA), PTFE, polyethylene terephthalate (PET), or a different type of rubber such as fluororubber, particularly perfluororubber, specifically, tetrafluoroethylene-perfluorovinyl ether-based compound (FFKM), tetrafluoroethylene-propylene-based compound (FEPM), etc. For example, the fluororubber can be any of those mentioned above. The average thickness of the second covering portion is, for example, in the range of 0.1 to 2 mm. The average thickness of the second covering portion refers to the average value of the thickness distances of the second covering portion measured at three points using a microscope during cross-section observation of the sealing material 1.

[0398] [Method of manufacturing sealing material 1] A method for manufacturing the sealing material 1 of the first embodiment will be described. Manufacturing methods 1 and 2 will be described below, but the contents of the present disclosure are not limited to the following descriptions. In addition, modified examples can also be formed by similar methods.

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

[0400] The application can be carried out using, for example, an air dispenser, a needle dispenser, a jet dispenser, or the like.

[0401] As a material constituting the first coating portion 3, at least one selected from the group consisting of the above-mentioned PFPE group-containing silane compound, carbon-carbon double bond-containing PFPE compound and hydrosilyl compound, and polysiloxane compound can be used, and these compounds can be used as a composition, as specifically described below.

[0402] PFPE-containing silane compounds The PFPE group-containing silane compound can be used in a composition containing a filler, a crosslinking agent, a catalyst, and / or a PFPE group-containing silane compound with a different structure.

[0403] Examples of fillers that can be used include silica-based fillers such as ground silica, fumed silica (dry silica), wet silica (precipitated silica), and crystalline silica (quartz powder), as well 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, and engineering plastics such as polyphenylene sulfide, polyether ketone, and polyoxybenzoate. Fillers that have been hydrophobized with a surface treatment agent can be used as needed. The fillers may also be surface-treated to be hydrophobized as needed.

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

[0405] The crosslinking agent is -OR bonded to the Si atom. g3 It is an organosilicon compound having at least two of the following formula: g3 are each independently a hydrogen atom or a monovalent organic group in each occurrence. A monovalent organic group refers to a group containing a carbon atom. Such monovalent organic groups include, but are not limited to, groups in which one hydrogen atom has been removed from a hydrocarbon group. The hydrocarbon group has the same meaning as above.

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

[0407] Examples of the crosslinking agent include: ·R g3 is a hydrogen atom, i.e., an organosilicon compound having at least two silanol groups in one molecule; Organosilicon compounds represented by formulas (E3) to (E5) described below can be given.

[0408] Organosilicon compounds having at least two silanol groups per molecule: In the organosilicon compound, the silanol groups are preferably present at both ends of the molecular main chain, where the molecular main chain refers to the relatively longest bonding chain in the molecule of the organosilicon compound.

[0409] An example of the compound having silanol groups at both ends of the molecular main chain is a compound represented by the following formula (E1).

[0410] [ka]

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

[0412] Each ε1 is independently an integer of 1 or greater. ε1 is preferably 2 or greater, more preferably 5 or greater, and is preferably 50 or less, 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 formula (E3), (E4), or (E5):

[0415] [ka]

[0416] In the above formulas (E3) and (E4), R g3 has the same meaning as above. g3is a moiety that can react with a moiety having a hydroxyl group or a hydrolyzable group bonded to the Si atom of the PFPE group-containing silane compound.

[0417] Above R g3 is preferably a monovalent organic group.

[0418] Above R g3 - is more preferably, each occurrence independently selected from 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] is.

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

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

[0421] Above R g5 is a divalent organic group. The divalent organic group has the same meaning as defined above.

[0422] Above R g5 may be, for example, a substituted or unsubstituted divalent hydrocarbon group which may contain one or more of an oxygen atom, a nitrogen atom, a silicon atom, and a sulfur atom, and which may contain an amide bond or a sulfonamide bond. The divalent hydrocarbon group preferably has 2 to 20 carbon atoms. Specific examples of the substituted or unsubstituted divalent hydrocarbon group which does not contain an oxygen atom, a nitrogen atom, a silicon atom, or a sulfur atom and does 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, tolylene, 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 have been substituted with halogen atoms.

[0423] In the above divalent hydrocarbon group, the oxygen atom is represented as -O- and the nitrogen atom is represented as -NR g51 -(R g51 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 are each independently represented by an alkyl group or an aryl group having 1 to 10 carbon atoms, and a sulfur atom may be included as -S-. In addition, in the above divalent hydrocarbon group, an amide bond is represented by -C(=O)NR g51 -(R g51 is the same as above), and the sulfonamide bond is -SO2NR g51 -(R g51 (The same as above.) Specific examples of such divalent hydrocarbon groups include the following. In the following formulae, Me represents a methyl group, Ph represents a phenyl group, and in each formula, Rf 1 The group is bonded.

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

[0425] In the above formulas (E3) and (E4), 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 has the same meaning as above. In the above formula (E5), R g6 -, independently in each occurrence, represents R g8 -R g7 - represents.

[0427] Above R g7 represents, independently in each occurrence, a single bond, an oxygen atom, or a divalent organic group, where the divalent organic group is as defined above.

[0428] Above R g7 is preferably 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] Above R g7 is more preferably an alkylene group having 1 to 3 carbon atoms; CH2CH2-NH-CH2CH2CH2, or CH2-O-CH2CH2CH2.

[0430] Above R g8 is a reactive functional group. g8 is preferably, each occurrence independently, an amino group, an epoxy group, a methacryl 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, and more preferably 3. In the above formula (E5), ε5 is an integer of 0 or more, and preferably 0 or 1. In the above formula (E5), ε6 is 1 or 2, and 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), more preferably a compound represented by formula (E3).

[0434] In one embodiment, the crosslinking agent does not have a group represented by PFPE in the 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 may be 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 alone or in combination of two or more.

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

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

[0440] The crosslinking agent may be, for example, —OH or —OR per mole of hydroxyl groups or hydrolyzable groups bonded to Si atoms of the PFPE group-containing silane compound. g3 The crosslinking agent may contain 1 mole or more, specifically 2 moles or more, of —OH or —OR per mole of hydroxyl groups or hydrolyzable groups bonded to Si atoms of the PFPE group-containing silane compound. g3 R may be contained, for example, at most 30 moles, specifically at most 20 moles, and more specifically at most 10 moles. g3 has the same meaning as above.

[0441] The crosslinking agent is a compound having a —OH or —OR bond per mole of hydroxyl groups or hydrolyzable groups bonded to Si atoms of the PFPE group-containing silane compound. g3can be contained in the range of, for example, 1 to 30 moles, specifically, 2 to 20 moles.

[0442] The crosslinking agent can be contained in an amount of, for example, 0.1 to 30 parts by mass, specifically 0.3 to 10 parts by mass, relative to 100 parts by mass of the curable composition of the present invention.

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

[0444] As the catalyst, metal catalysts, organic acid catalysts, inorganic acid catalysts, base catalysts (for example, ammonia, triethylamine, diethylamine, etc.), etc. can be used.

[0445] Examples of the metal atoms contained in the metal catalyst include titanium, zirconium, tin, etc. Among these metal atoms, it is preferable to use titanium or zirconium.

[0446] The metal catalysts mentioned above include alkoxides (-OR h It is preferable to use a compound having the formula

[0447] Specific examples of the metal catalyst include tetra-n-butyl titanate, tetraisopropyl titanate, titanium diisopropoxy-bis(ethylacetoacetate), tetra-n-butyl zirconate, tetra-n-propyl zirconate, dibutyltin dimethoxide, and dibutyltin dilaurate, and preferred examples include tetraisopropyl titanate and tetra-n-propyl zirconate.

[0448] In the above metal-based catalyst, the above R h The alkyl group is preferably an alkyl group having 1 to 4 carbon atoms. The use of such a catalyst further promotes the condensation reaction.

[0449] In the above metal-based catalyst, the above R hAs the alkyl group, an alkyl group having 1 to 3 carbon atoms is more preferable. When a catalyst having such an alkyl group is used, the condensation reaction is particularly accelerated. The catalyst is easily dissolved or dispersed in the curable composition, and can contribute to the promotion of a uniform reaction. The catalyst contains little foreign matter, and can contribute to the formation of a transparent cured product of the curable composition.

[0450] Examples of the organic acid catalyst include compounds having a carboxylic acid, a sulfonic acid, or a phosphoric acid, and specific examples thereof include acetic acid, trifluoroacetic acid, methanesulfonic acid, toluenesulfonic acid, and alkylphosphoric acid.

[0451] Examples of the inorganic acid catalyst include hydrochloric acid and sulfuric acid.

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

[0453] The above catalysts may be used alone or in combination of two or more.

[0454] The PFPE group-containing silane compound represented by another structural formula is, for example, the PFPE group-containing silane compound (A′): [ka] It is expressed as:

[0455] In formula (A'), the description of the same parts as those of formula (A) will be omitted.

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

[0457] Above Rf 1 is preferably C substituted by one or more fluorine atoms 1-16 alkyl group, more preferably C 1-16 It is a perfluoroalkyl group. 1-16 The perfluoroalkyl group may be a straight chain or a branched chain, and is preferably a straight chain or branched chain C 1-6 Perfluoroalkyl groups, especially straight-chain or branched C 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 optionally substituted with one or more fluorine atoms 1-6 It is an alkyl group. 1-6 The "alkyl group" may be a straight chain or a branched chain, and is preferably a straight chain or branched chain C 1-3 It is an alkyl group.

[0459] In one embodiment, the above C 1-6 The alkyl group is a straight-chain C 1-6 is an alkyl group, preferably C 1-3 It is an alkyl group. Rf 1 In one embodiment, is CF3-; in another embodiment, is CF3CF2-; and in yet another embodiment, is CF3CF2CF2-.

[0460] In the above embodiment, Rf 1 is preferably C substituted by one or more fluorine atoms1-6 alkyl group, more preferably C 1-6 In this embodiment, the C 1-6 The perfluoroalkyl group may be linear or branched, and is preferably a linear C 1-6 Perfluoroalkyl groups, especially linear C 1-3 It is a perfluoroalkyl group.

[0461] α1' is an integer of 1 to 9. These α1 and α1' are X A The sum of α1 and α1' can vary depending on the valence of X A For example, X A When X is a decavalent 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. A is a divalent organic group, α1 and α1′ are 1.

[0462] If necessary, the PFPE group-containing silane compound may be diluted with a solvent. Any solvent capable of dissolving, suspending, or dispersing the material constituting the first coating portion 3 may be used. The solvent may be dissolved in an appropriate fluorine-based solvent to 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 portion 3. The viscosity of the composition can be adjusted by using a mixture containing the material constituting the first coating portion 3 and a solvent. The use of a solvent can improve the handleability of the composition. Furthermore, the shape of the cured product (first coating portion 3) formed from the material constituting the first coating portion 3 can be easily controlled. For example, the fluidity of the composition can be improved, allowing for a faster coating speed. Furthermore, the ability to extrude and coat the composition with low pressure can facilitate air dispenser and jet dispense processing, thereby increasing the flexibility of the processing steps.

[0463] Examples of 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 (e.g., Zeorora H (trade name)), C4F9OCH3, C4F9OC2H5, CF3CH2OCF2CHF2, and CF 13 CH=CH2, xylene hexafluoride, perfluorobenzene, methyl pentadecafluoroheptyl ketone, trifluoroethanol, pentafluoropropanol, hexafluoroisopropanol, HCF2CF2CH2OH, methyl trifluoromethanesulfonate, trifluoroacetic acid, and CFO (CF2CF2O) s3 (CF2O) s4 CF2CF3 [wherein s3 and s4 are each independently an integer of 0 or more and 1000 or less, and the order of the repeating units enclosed in parentheses with s3 or s4 is arbitrary in the formula, provided that the sum of s3 and s4 is 1 or more. ], 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-dichloro-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 a fluorine-based solvent selected from the group consisting of perfluorobutyl ethyl ether can also be used.

[0464] Before applying the first covering 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 the application and purpose. The solvent used for dilution may be any of the fluorine-containing additives exemplified above. For example, the composition may be dissolved in a solvent such as 1,3-bis(trifluoromethyl)benzene, Fluorinert (manufactured by 3M), perfluorobutyl methyl ether, or perfluorobutyl ethyl ether to a desired concentration. The use of the above-mentioned solvents is particularly preferred for thin film coating applications.

[0466] PFPE compounds and hydrosilyl compounds containing carbon-carbon double bonds The carbon-carbon double bond-containing PFPE compounds and hydrosilyl compounds may be used in compositions containing fillers, catalysts, organosilicon compounds, hydrolysis catalysts, additives, and / or other structural carbon-carbon double bond-containing PFPE compounds.

[0467] As the filler, those described in the PFPE group-containing silane compound can be used.

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

[0469] The catalyst is preferably a transition metal catalyst, and the transition metal contained in the catalyst preferably includes at least one selected from the group consisting of platinum, rhodium, ruthenium, iridium, and palladium.

[0470] As the catalyst, platinum or a platinum compound is preferably used, which is advantageous in terms of reducing the cost of the catalyst and being readily available.

[0471] Examples of the platinum compound include chloroplatinic acid or a complex of chloroplatinic acid with an olefin such as ethylene, a complex of chloroplatinic acid with an alcohol or vinylsiloxane, and metallic platinum supported on silica, alumina, carbon, or the like.

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

[0473] The above catalyst can be used in a solid state when the catalyst is solid, but in order to obtain a more uniform first coating portion 3, it is preferable to use a solution of chloroplatinic acid or a complex in an appropriate solvent and then dissolve it in the carbon-carbon double bond-containing PFPE compound.

[0474] The catalyst may be contained in an effective amount capable of contributing to the reaction, for example, an effective amount capable of contributing to the reaction as a hydrosilylation reaction catalyst. The content of the catalyst may be increased or decreased as appropriate depending on the desired curing rate. The catalyst is usually contained in an amount of 0.1 to 500 ppm by mass (metal atom equivalent) relative to the carbon-carbon double bond-containing PFPE compound.

[0475] The organosilicon compound has one or more hydrolyzable groups bonded to a silicon atom in each molecule, and can function as an adhesion promoter that can impart self-adhesive properties to the composition.

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

[0477] The organosilicon compound may have one or more monovalent perfluoroalkyl groups or monovalent perfluorooxyalkyl groups. Such a structure can improve the compatibility and dispersibility of the organosilicon compound with the carbon-carbon double bond-containing PFPE compound, allowing the cured product (first coating portion 3) to be appropriately formed.

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

[0479] The organosilicon compound is preferably an organosiloxane or trialkoxysilane having one or more alkoxysilyl groups bonded to a silicon atom via a carbon atom or a carbon atom and an oxygen atom.

[0480] The siloxane skeleton of the organosiloxane in the organosilicon compound may be cyclic, linear, branched, or a combination thereof. The organosiloxane may be one represented by the following general formula:

[0481] [ka]

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

[0483] In the above general formula, R j1 are each independently a halogen-substituted or unsubstituted monovalent hydrocarbon group.j1 The number of carbon atoms contained 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; aryl groups such as phenyl and tolyl; aralkyl groups such as benzyl and phenylethyl; and substituted monovalent hydrocarbon groups in which some or all of the hydrogen atoms of these groups have been substituted with halogen atoms such as fluorine atoms. Of these, the monovalent hydrocarbon group is more preferably a methyl group.

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

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

[0486] In the above general formula, R j3 is represented by the following general formula: -Z j1 -Rf j1 It is a group represented by the formula: j1 is Rf on the right j1 Combine with. [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] and R is an o-, m-, or p-dimethylsilylphenylene group represented by the formula (wherein the phenylene group is bonded to the N atom). j9 is a hydrogen atom or a substituted or unsubstituted monovalent hydrocarbon group preferably having 1 to 12 carbon atoms, particularly 1 to 10 carbon atoms. j6 and j7 are each independently an integer of 1 to 10, preferably an integer of 1 to 5, in each occurrence. In the above formula, Rf j1 represents a monovalent perfluoroalkyl group or a monovalent perfluorooxyalkyl group.]

[0487] The monovalent perfluoroalkyl group or monovalent perfluorooxyalkyl group has the same meaning as defined above.

[0488] Above R j4 is an epoxy group bonded to a silicon atom via a carbon atom or a carbon atom and an oxygen atom, and specific examples include the following groups: [ka] (In the formula, R j10 is a divalent hydrocarbon group having 1 to 10 carbon atoms, particularly 1 to 5 carbon atoms, which may contain an oxygen atom, and specifically an alkylene group such as a methylene group, ethylene group, propylene group, butylene group, hexylene group, cyclohexylene group, or octylene group.

[0489] Specific examples of organosiloxanes used as the organosilicon compounds include those represented by the following structural formulas: 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 independently an integer of 0 or greater in each occurrence. F - and Rf are as defined above.

[0492] The trialkoxysilane used as the organosilicon compound is not particularly limited, but preferred are silanes having a reactive organic group in addition to an alkoxy group in the same molecule, 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-isocyanatopropyltriethoxysilane, and fluorine-containing trialkoxysilanes such as perfluoropropyltrimethoxysilane.

[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 in the above range, the first coating portion 3 can have sufficient adhesiveness, appropriate fluidity, and curability. Such a first coating portion 3 can have good physical hardness.

[0494] The hydrolysis catalyst has a catalytic function for enhancing the hydrolysis property of the organosilicon compound.

[0495] The hydrolysis catalyst is not particularly limited as long as it does not inhibit the addition curing properties of the material constituting the first coating portion 3. Examples include organic titanium compounds such as titanium tetraisopropoxide, titanium tetra-normal butoxide, and titanium tetraacetylacetonate; organic zirconium compounds such as zirconium tetra-normal propoxide, zirconium tetra-normal butoxide, and zirconium tetraacetylacetonate; organic tin compounds such as dibutyltin dilaurate, dibutyltin diacetate, and dibutyltin acetylacetonate; organic aluminum compounds such as aluminum trisacetylacetonate, aluminum trisethylacetoacetate, and diisopropoxyaluminum ethylacetoacetate; and other acidic catalysts and basic catalysts. Among these, from the viewpoint of the storage stability of the first coating portion 3, it is preferable to use at least one selected from the group consisting of organic titanium compounds, organic zirconium compounds, organic tin compounds, and organic aluminum compounds. The hydrolysis catalyst may be used alone or in combination of two or more.

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

[0497] Additives can be added as needed, thereby improving the practicality of the first covering portion 3. For example, organosiloxane having one or more epoxy groups bonded to silicon atoms via carbon atoms or carbon atoms and oxygen atoms in one molecule, but no alkoxy groups, can be added to act as an adhesion promoter.

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

[0499] The siloxane skeleton of the organosiloxane of the additive may be the same as that of the organosiloxane that can be used as the organosilicon compound, and may be cyclic, linear, branched, or a mixture of these.

[0500] As the organosiloxane, those represented by the following general formula can be used.

[0501] [ka]

[0502] In the above formula, R j1 , R j6 , R j3 , R j4 , j1, j2, j3, and j4 have the same meanings as above.

[0503] Specific examples of organosiloxanes used as the additives include those represented by the following structural formulas. These compounds may be used alone 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" has the same meaning as 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 the terminal oxygen atom.

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

[0505] The amount of the 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 the additive in the amount described above, the first coating part 3 can have particularly sufficient adhesiveness, and the flowability of the first coating part 3 can be particularly good. By including the additive in the amount described above, the physical strength of the first coating part 3 can also be good.

[0506] Examples of the carbon-carbon double bond-containing PFPE compound represented by another structural formula include the carbon-carbon double bond-containing PFPE compound (B'): [ka] A compound represented by the following formula can be used.

[0507] In formula (B'), the description of the same parts as those of formula (B) will be omitted.

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

[0509] Above Rf 1 is preferably C substituted by one or more fluorine atoms 1-16 alkyl group, more preferably C 1-16 It is a perfluoroalkyl group. 1-16 The perfluoroalkyl group may be a straight chain or a branched chain, and is preferably a straight chain or branched chain C 1-6 Perfluoroalkyl groups, especially straight-chain or branched C 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 optionally substituted with one or more fluorine atoms 1-6 It is an alkyl group. 1-6 The "alkyl group" may be a straight chain or a branched chain, and is preferably a straight chain or branched chain C 1-3 It is an alkyl group.

[0511] In one embodiment, the above C 1-6 The alkyl group is a straight-chain C 1-6 is an alkyl group, preferably C 1-3 It is an alkyl group. Rf 1In one embodiment, is CF3-; in another embodiment, is CF3CF2-; and in yet another embodiment, is CF3CF2CF2-.

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

[0513] β1' is an integer of 1 to 9. These β1 and β1' are X A The sum of β1 and β1' can vary depending on the valence of X A For example, X A When X is a decavalent 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. A is a divalent organic group, β1 and β1' are 1.

[0514] If necessary, the PFPE group-containing alkenyl compound and the hydrosilyl compound may be diluted with a solvent, which may be any of the solvents described for the PFPE group-containing silane compound.

[0515] Polysiloxane compounds The polysiloxane compound can be used as a composition containing fillers, pigments, dyes, colorants such as fluorescent whitening agents, antifungal agents, antibacterial agents, surface modifiers such as non-reactive phenylsilicone oils as bleed oils, fluorosilicone oils, and organic liquids incompatible with silicones, and solvents such as toluene, xylene, volatile solvent oils, cyclohexane, methylcyclohexane, and low-boiling isoparaffins. These components may be added at any step in the production method of the present invention.

[0516] As the filler, those described in the PFPE group-containing silane compound can be used.

[0517] When the polysiloxane is an organosiloxane (a), (b), or (c), compounds that may be contained in the composition are described below.

[0518] (a) Polyorganosiloxane The polyorganosiloxane (a) may be used together with a reinforcing filler or the like.

[0519] The reinforcing filler has a specific surface area of ​​50m 2 / g or more. Examples of the reinforcing filler include fumed silica, wet silica, and its calcined silica, as well as those surface-treated with organosilane, cyclic polysiloxane, linear polysiloxane, organosilazane, or the like, or blends thereof. The reinforcing filler may be contained in an amount of 10 to 100 parts by weight, preferably 20 to 50 parts by weight, per 100 parts by weight of the polyorganosiloxane.

[0520] The polyorganosiloxane (a) can be used as a processing aid, if necessary, together with silicone oil having terminal OH or CHO groups. It can also be used together with other non-reinforcing fillers such as diatomaceous earth, ground silica, clay, alumina, calcium carbonate, and talc, conductivity imparting agents such as carbon black and graphite, roll workability improvers such as metal soaps, heat resistance improvers such as iron oxide and cerium oxide, as well as silane coupling agents, colorants, and flame retardant imparting agents.

[0521] The polyorganosiloxane (b) can be used together with an amino group-free hydrolyzable organosilane and / or its partial hydrolyzed condensate, an amino group-containing hydrolyzable organosilane and / or its partial hydrolyzate, a curing catalyst, and the like.

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

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

[0524] R 6k C containing aromatic rings 7-10 is a divalent hydrocarbon group of the formula A group in which a group and an alkylene group are bonded is preferred, and examples thereof include those represented by any of the following formulae: -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 any of the ortho, meta, and para positions. The meta position is particularly preferred.

[0525] R6m is C 1-10 Examples of the divalent hydrocarbon group include alkylene groups such as methylene, ethylene, propylene, tetramethylene, hexamethylene, octamethylene, decamethylene, and 2-methylpropylene, arylene groups such as phenylene, and groups in which these alkylene groups and arylene groups are bonded together. Preferably, C 1-4 is an alkylene group of the formula:

[0526] R 6n and R 6o are each independently 1-10 is an unsubstituted or halogen-substituted monovalent hydrocarbon group of the formula 6i Examples of the same can be given as those given in R. 6n is preferably a methyl group, a vinyl group, or a phenyl group, more preferably a methyl group, and R 6o As for C 1-4 The alkyl group is preferably a methyl group or an ethyl group.

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

[0528] Hydrolyzable groups and / or hydroxyl groups (R 6f Each molecule must contain 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 molecular chain terminals, or may be bonded to silicon atoms at non-terminal locations (i.e., other than both molecular chain terminals), or a combination thereof, with at least one of each being bonded to a molecular chain terminal.

[0529] There are no particular restrictions on the curing catalyst as long as it has a condensation catalytic action, but in applications where the use of organotin compound catalysts is environmentally undesirable, it is preferable to use a catalyst other than an organotin compound. Specific examples of such curing catalysts include titanate esters or titanium chelate compounds such as tetraisopropoxytitanium, tetra-n-butoxytitanium, tetrakis(2-ethylhexoxy)titanium, isopropoxytitanium bis(ethylacetoacetate), isopropoxybis(acetylacetonato)titanium, and titanium isopropoxyoctylene glycol; aluminum alcoholates or aluminum chelate compounds such as aluminum isopropylate, aluminum sec-butylate, aluminum ethylate, ethylacetoacetate aluminum diisopropylate, aluminum tris(ethylacetoacetate), and alkylacetoacetate aluminum diisopropylate; silanes or siloxanes containing a guanidyl group such as tetramethylguanidylpropyltrimethoxysilane, tetramethylguanidylpropylmethyldimethoxysilane, and tetramethylguanidylpropyltris(trimethylsiloxy)silane; and conventionally known catalysts such as lead octoate and other acidic or basic catalysts. Among these, organic titanium compounds are preferred, particularly titanium chelate compounds, with isopropoxytitanium bis(ethylacetoacetate) and isopropoxybis(acetylacetonato)titanium being particularly preferred. The curing catalyst may be used alone or as a mixture of two or more.

[0530] For example, the composition may contain 0.2 to 30 parts by mass of an amino group-free hydrolyzable organosilane and / or its partial hydrolyzed condensate, 0.1 to 10 parts by mass of an amino group-containing hydrolyzable organosilane and / or its partial hydrolyzate, and 0.1 to 20 parts by mass of a curing catalyst, relative to 100 parts by mass of organopolysiloxane.

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

[0532] Examples of inorganic fillers include silica-based fillers such as ground silica, fumed silica (dry silica), wet silica (precipitated 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 oxide, carbon black, glass beads, glass balloons, resin beads, and resin balloons. These may be used alone or in combination of two or more. Among these, fumed silica and calcium carbonate are preferred. These inorganic fillers may be untreated or may be surface-treated with known treating agents such as chlorosilanes, alkoxysilanes, silazanes, organopolysiloxanes, fatty acids, and fatty acid derivatives.

[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 improvers, non-reactive dimethyl silicone oils and methylphenyl silicone oils as plasticizers (e.g., dimethylpolysiloxanes capped at both ends with trimethylsiloxy groups, dimethylsiloxane-diphenylsiloxane copolymers capped at both ends with trimethylsiloxy groups, and dimethylsiloxane-methylphenylsiloxane copolymers capped at both ends with trimethylsiloxy groups), isoparaffin, and trimethylsiloxy units ((CH3)3SiO) as crosslink density improvers. 1 / 2 and network polysiloxanes composed of SiO2 units and SiO2 units. Among these, non-reactive dimethyl silicone oil and methylphenyl silicone oil are suitable as plasticizers for adjusting 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 the organopolysiloxane represented by formula (II-1).

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

[0536] The silane coupling agent can be added for the purpose of imparting adhesiveness. Any conventionally known silane coupling agent can be used as the silane coupling agent, without any particular limitation. 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-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, and 3-isocyanatepropyltriethoxysilane. The above silane coupling agents can be used alone 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 have sufficient adhesiveness. On the other hand, if the amount added is more than 20 parts by weight, the curing of the polyorganosiloxane tends to be inhibited. 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. Note that titanate-based coupling agents or aluminate-based coupling agents 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 as the curing catalyst, and is not particularly limited. Examples of curing catalysts that can be used include organic tin, inorganic tin, titanium catalysts, bismuth catalysts, metal complexes, platinum catalysts, basic substances, and organic phosphorus oxides. Platinum catalysts are more preferably platinum catalysts or rhodium catalysts. Platinum catalysts include, for example, chloroplatinic acid, alcohol-modified chloroplatinic acid, or platinum complexes having a chelate structure. The above curing catalysts can be used alone or in combination of two or more. The amount of curing catalyst added is 5 ppm or more and 100 ppm or less of platinum by weight relative to the polyorganosiloxane. If the amount added is less than 5 ppm, the curing of the polyorganosiloxane tends to be insufficient. On the other hand, if the amount added is more than 100 ppm, the curing proceeds too quickly, making it difficult to obtain a uniform composition. The amount added 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 as the crosslinking agent, and there is no particular limitation. The crosslinking agent is preferably an organohydrogenpolysiloxane having at least three hydrosilyl groups per molecule. Examples of such crosslinking agents include polymethylhydrogensiloxane and poly(dimethylsiloxane-methylhydrogensiloxane). The above crosslinking agents can be used alone or in combination of two or more. The amount of crosslinking agent added is such that the molar ratio of the [Si-H] groups in the crosslinking agent to the [CH═CH—] groups in the alkenyl group-containing polyorganosiloxane, expressed as "[Si-H] / [CH═CH—]," is 0.5 or more and 1.5 or less. If the amount is less than 0.5, the crosslinking of the polyorganosiloxane is insufficient, and sufficient strength tends to be insufficient. On the other hand, if the amount is more than 1.5, crosslinking proceeds excessively, and flexibility tends to be lost. The amount 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 treatment selected from the group consisting of plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment may be performed on the core portion 2. After the above treatment, a composition containing the raw materials for the material constituting the first covering portion 3 is applied. This may improve the adhesion between the core portion 2 and the first covering 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 of placing the core 2 in a molding frame, and injecting a composition containing a material that constitutes the first covering part 3 onto the core 2 to perform cast molding. This makes it easy to mold the first covering part 3.

[0541] After step A1, if necessary, treatments such as pressurization, heating, and humidification can be carried out to form the sealing material 1 of the present disclosure. For example, the mixture may be left to stand for 1 to 24 hours, for example, at 1 to 5°C. Alternatively, the mixture may be left to stand at room temperature (for example, 20 to 30°C). If necessary, treatments such as pressurization and humidification may be carried out simultaneously.

[0542] If necessary, a processing step may be carried out to process 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 step A1, a step of forming the core portion 2 may be carried out. Specifically, Process A0: A forming step of forming the core portion 2 using a composition containing a material that constitutes the core portion 2. can be performed.

[0545] The composition may contain, in addition to the material that constitutes the core 2, a reinforcing filler, an organic peroxide, a curing catalyst, a coupling agent, a crosslinking agent, a curing retarder, a colorant, and the like.

[0546] Examples of reinforcing fillers that can be used include silica-based fillers such as crushed silica, fumed silica (dry silica), wet silica (precipitated silica), and crystalline silica (quartz powder), as well 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, and engineering plastics such as polyphenylene sulfide, polyether ketone, and polyoxybenzoate, and fillers that have been made hydrophobic with a surface treatment agent can be used as needed.

[0547] Examples of organic peroxides that can be used include dicumyl peroxide, ditertiary butyl peroxide, 2,5-dicumyl-2,5-di(tertiary butyl peroxy)hexane, 2,5-dicumyl-2,5-di(tertiary butyl peroxy)hexyne, di(tertiary butyl peroxy)diisopropyl benzene, and 1,1'-di(tertiary butyl peroxy)-3,3,5-trimethyl cyclohexane.

[0548] The curing catalyst can be added, for example, for the purpose of accelerating the curing reaction. Any conventionally known curing catalyst can be used as the curing catalyst, and is not particularly limited. Examples of the curing catalyst that can be used include organic tin, inorganic tin, titanium catalyst, bismuth catalyst, metal complex, platinum catalyst, basic substance, and organic phosphorus oxide. More preferably, the curing catalyst is a platinum catalyst or a rhodium catalyst. Examples of the platinum catalyst include chloroplatinic acid, alcohol-modified chloroplatinic acid, and platinum complexes having a chelate structure. The above curing catalysts can be used alone or in combination of two or more.

[0549] A coupling agent can be added to impart adhesiveness, and examples of the coupling agent include a silane coupling agent. As the silane coupling agent, any conventionally known silane coupling agent can be used, and there is no particular limitation.As the silane coupling agent, for example, 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-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, or 3-isocyanatepropyltriethoxysilane etc. can be used. The above silane coupling agents can be used alone or in combination of two or more.

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

[0551] Examples of the cure retarder include compounds selected from the group consisting of acetylene alcohols such as 1-ethynylcyclohexanol and 3-methyltridec-1-yn-3-ol (EMDC), silanes of acetylene alcohols such as dimethylbis(1,1-dimethyl-2-propynyloxy)silane (PLR-22) and 3-(trimethylsilyloxy)-3-methyl-1-butyne (PLR-31), siloxane-modified compounds, phosphorous acid compounds (particularly phosphite esters) such as tri(isopropyl)phosphite, tris(di-tert-butylphenyl)phosphite, triphenylphosphite, and tris(2-ethylhexyl)phosphite, ethylenediamines such as tetramethylethylenediamine, benzotriazoles such as 5-methyl-1H-benzotriazole, and mixtures thereof.

[0552] The colorant may be, for example, a pigment, a dye, or an optical brightener.

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

[0554] (Manufacturing method 2) The method 2 for producing the sealing material 1 includes the following steps B1 to B3. Process B1: A first sheet molding step in which the material constituting the core portion 2 is molded into a sheet to form a first sheet. Process B2: a second sheet molding step of molding the material constituting the first covering portion 3 into a sheet shape to form a second sheet; Process B3: a sheet arranging step of arranging the first sheet and the second sheet in a stacked manner in a molding frame; By carrying out the above steps B1 to B3, the sealing material 1 can be formed.

[0555] That is, manufacturing method 2 is characterized in that sheets are formed in advance 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 2 may be used as a composition. The compounds contained in the composition have the same meanings as those described above.

[0557] The first sheet may be formed into a sheet shape by any method, including, but not limited to, extrusion molding, compression molding, and cutting molding. The first sheet may be cured independently or simultaneously with the second sheet described below.

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

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

[0560] The second sheet may be formed into a sheet shape by any method without particular limitation. For example, the second sheet may be formed by heating as necessary. 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. The second sheet may be left to stand at room temperature without heating. Room temperature means, for example, 20 to 30°C. The second sheet may be cured independently or simultaneously with the first sheet.

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

[0562] moreover, Process B4: a curing step of curing at least one of the first sheet and the second sheet by heat treatment or light irradiation treatment after the disposing step; 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, or the heat treatment or light irradiation treatment may be performed on both the first sheet and the second sheet.

[0563] In addition, instead of step B4, Process B4': After the sheet placement step, the placed first sheet and second sheet are removed from the molding frame, and then a curing step is performed. may be performed.

[0564] moreover, Process B5: After the hardening process, the product is processed into the desired shape. can be performed.

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

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

[0567] If necessary, a second covering portion may be provided.

[0568] [Variation 1] Fig. 3 is a plan view of modified example 1 of the sealing material of the present disclosure. Fig. 4 is a cross-sectional view taken along line IV-IV of Fig. 3. In the first embodiment, the first covering portion 3 is located on the entire upper and lower surfaces of the core portion 2, but in this modified example 1, the first covering portion 3A is located on a part of the upper surface and a part of the lower surface of the core portion 2A. This different configuration will be explained below. The other materials and configuration are the same as those of the first embodiment, and therefore explanations thereof will be omitted.

[0569] The core portion 2A has the same configuration as the core portion 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 portions 3A have a convex shape in the sealing direction of the sealing material 1A. One first covering portion 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 are thickest in the center in cross section, gradually decreasing in thickness toward both ends, and are thinnest at both ends. The first covering portions 3A may have other shapes.

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

[0573] In the 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, for example, in the range of 0.3 to 5 mm, specifically in the range of 0.3 to 3 mm, and more specifically in the range of 0.7 to 2 mm.

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

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

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

[0577] [Variation 2] 5 shows a portion of a cross-sectional view of Modified Example 2 of the sealing material of the present disclosure. In Modified Example 1, core portion 2A is rectangular in cross section, but in Modified Example 2, core portion 2B is circular. The other materials and configurations are the same as in Modified Example 1, and therefore description thereof will be omitted.

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

[0579] The core 2B has a circular cross section. The core 2B does not have to be a perfect circle, and may have some distortion or irregularities. In Modification 2, the core 2B has a solid shape as shown in FIG. 5, but is not limited to this and may have a hollow shape, for example.

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

[0581] In the 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, for example, in the range of 10 to 90%, and more specifically, in the range of 20 to 80%. By exposing a portion of the upper surface of the core portion 2B, the amount of material constituting the first covering portion 3B can be reduced.

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

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

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

[0585] [Variation 3] 6 shows a cross-sectional view of a portion of Variation 3 of the sealing material of the present disclosure. In Variation 2, the first covering portion 3 was located only partially on the core portion 2B in the cross section, but in Variation 3, the first covering portion covers the entire surface of the core portion 2C. In other words, the core portion 2C is not exposed. The other materials and configuration are the same as in Variation 2, and therefore a description thereof will be omitted.

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

[0587] Core 2C has the same configuration as core 2B. That is, core 2C is circular in cross section. Note that core 2C does not have to be perfectly circular, and may have some distortion or irregularities.

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

[0589] In the 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, for example, in the range of 1 to 40%, or in the range of 5 to 20%.

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

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

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

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

[0597] [Variation 4] 7 shows a cross-sectional view of a portion of Variation 4 of the sealing material of the present disclosure. In Variation 3, core portion 2C is circular in cross section, but in Variation 4, core portion 2D is elliptical in cross section. The other materials and configuration are the same as in Variation 3, and therefore description thereof will be omitted.

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

[0599] The core 2D has an elliptical cross section with the major axis in the X-axis direction and the minor axis in the Z-axis direction. The core 2D may have some distortion or irregularities. The above configuration allows the area that can be sealed by the sealing material 1D to be expanded. The ratio of the major axis to the minor axis is not particularly limited, but may be, for example, in the range of 1.1:1 to 5:1. The minor axis may be in the X-axis direction and the major axis in the Z-axis direction, in which 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 sealing material 1D (the major axis of the sealing material 1D) is not particularly limited, but may be, for example, in the range of 2 to 98%, or in the range of 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 sealing material 1D (the minor axis of the sealing material 1D) is not particularly limited, but may be, for example, in the range of 1 to 40%, or in the range of 5 to 20%.

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

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

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

[0605] In the cross section, the ratio of the thickness T1 of the first covering portion 3D to the maximum value of the thickness T of the sealing material 1D is not particularly limited, but may be, for example, in the range of 1 to 45%, or in the range of 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, for example, in the range of 1 to 450%, or in the range of 30 to 200%.

[0607] 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 limiting. For example, the thickness of the first covering portion 3D in the major axis direction may be smaller than the thickness of the first covering portion 3D in the minor axis direction.

[0608] [Variation 5] 8 shows a cross-sectional view of a portion of Variation 5 of the sealing material of the present disclosure. In Variation 1, core portion 2A is rectangular in cross section, but in Variation 5, core portion 2E has a C-shape in cross section. The other materials and configurations are the same as in Variation 1, and therefore a description thereof will be omitted.

[0609] As shown in Fig. 8, the sealing material 1E has a core 2E and a first covering portion 3E located on the outer surface of the core 2E. In Fig. 8, the right side of the paper surface is the inside of the sealing material 1E, and the left side of the paper surface 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 these. The core 2E may also have an inverted C-shape, with both ends located outside the sealing material 1E. The core 2E does not have to be line-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 C-shaped inner opening is not particularly limited, but may be, for example, in the range of 0.5 to 8 mm, or in the range of 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, for example, in the range of 5 to 1000%, or in the range of 10 to 500%.

[0612] The size of the C-shaped cutout, 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 in the range of 20 to 120°, for example.

[0613] In the 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, for example, in the range of 1 to 45%, or in the range of 5 to 40%.

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

[0615] In cross section, one of the two first covering portions 3E covers the uppermost portion of the core portion 2E and its periphery, and the other covers the lowermost portion of the core portion 2E and its periphery. The uppermost portion refers to the point on the upper surface of the core portion 2E that is located furthest in the forward Z direction. The lowermost portion refers to the point on the lower surface of the core portion 2E that is located 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 length L of the sealing material 1E (length of the core portion 2E) is not particularly limited, but may be, for example, in the range of 10 to 90%, or in the range of 20 to 80%.

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

[0618] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3E to the thickness T2 of the core portion 2E is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0619] [Variation 6] 9 shows a partial cross-sectional view of Modified Example 6 of the sealing material of the present disclosure. In Modified Example 1, the core 2A was rectangular in cross section, but in Modified Example 6, the core 2F is convex in cross section toward the inside and outside of the sealing material 1F, and has recesses on the upper and lower surfaces. Note that the recesses are not limited to the example shown in the figure, and may have any shape as long as the upper and / or lower surfaces of the core 2F have recesses, i.e., the upper surface of the core 2F has recesses and the lower surface has recesses. The other materials and configurations are the same as those of Modified Example 1, and their description will be omitted.

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

[0621] In cross section, the core 2F has an innermost part 20a of the core 2F and an outermost part 20b of the core 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, in cross section, a first protrusion 21F and a second protrusion 22F that are convex in the forward Z direction, and these are connected by a connecting portion 25F. The first protrusion 21F and the second protrusion 22F are connected by the connecting portion 25F to form a recess. That is, in the seal member 1F, the core portion 2F has annular grooves on the upper and lower surfaces of the core portion 2F. A first covering portion 3F is provided within the recess, i.e., within the annular groove.

[0623] The underside of the core 2F has a third protrusion 23F and a fourth protrusion 24F, which are convex in the reverse Z direction in cross section and are connected by a connecting portion 25F. The third protrusion 23F and the fourth protrusion 24F are connected by the connecting portion 25F to form a recess. A first covering portion 3F is provided within the recess.

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

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

[0626] By having the core portion 2F have the above-mentioned shape, manufacturing becomes easier, and for example, during manufacturing, leakage of the composition containing the material that constitutes the first covering portion 3F or misalignment of the sheet formed from the material that constitutes the first covering portion 3F can be prevented.

[0627] In cross section, the two first covering portions 3F are each located in a recess of the core portion 2F so as to cover the connecting portion 25F. The first covering portions 3F do not cover the uppermost portions of the first convex portion 21F and the second convex portion 22F or the lowermost portions of the third convex portion 23F and the fourth convex portion 24F. Note that the first covering portions 3F may cover the uppermost portions of the first convex portion 21F and / or the second convex portion 22F and the lowermost portions of the third convex portion 23F and / or the fourth convex portion 24F.

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

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

[0630] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3F to the maximum value of the thickness T2 of the core portion 2F is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0631] In the cross section, the ratio of the minimum value of the thickness T3 of the connecting portion 25F to the maximum value of the thickness T2 of the core portion 2F is not particularly limited, but may be, for example, in the range of 5 to 95%, or in the range of 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 value of the thickness T of the sealing material 1F is not particularly limited, but may be, for example, in the range of 1 to 45%, or in the range of 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, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0634] [Variation 7] 10 shows a cross-sectional view of a portion of Variation 7 of the sealing material of the present disclosure. In Variation 6, the core portion 2F in cross section is convex toward the inside and outside of the sealing material, and has concave portions on the top and bottom surfaces. However, in Variation 7, the core portion 2G has two circular portions 21G and 22G connected by a connecting portion 23G. In other words, it has a dumbbell shape. The other materials and configuration are the same as in Variation 6, and their description will be omitted.

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

[0636] The core 2G has a first circular portion 21G on the inside and a second circular portion 22G on the outside, with the first circular portion 21G and the second circular portion 22G connected by a connecting portion 23G. In FIG. 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 seal member 1G, the core 2G has annular grooves on the upper and lower surfaces of the core 2G. The first covering portion 3G is provided within the annular groove. The above-described shape of the core 2G facilitates manufacturing and, for example, prevents leakage of a composition containing the raw materials of the first covering portion 3G or misalignment of a sheet formed from the first covering portion 3G during manufacturing. Note that although the first circular portion 21G and the second circular portion 22G have the same size in FIG. 10, they may have different sizes. The upper and / or lower surfaces of connecting portion 23G may have a slight inclination with respect to the X direction. Furthermore, connecting portion 23G is not limited to the shape shown in the drawings, and may have other shapes; for example, the upper and / or lower surfaces of connecting portion 23G may be curved or uneven.

[0637] The first covering portions 3G are provided on the connecting portion 23G and its periphery on the upper and lower surfaces of the core portion 2G. That is, in cross section, one first covering portion 3G is provided on the upper surface of the core portion 2G, i.e., on the upper side of the paper, 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. The first covering portions 3G do not cover the top and bottom 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 length L of the sealing material 1G (length of the core portion 2G) is not particularly limited, but may be, for example, in the range of 10 to 99%, or in the range of 20 to 90%.

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

[0640] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3G to the maximum value of the thickness T2 of the core portion 2G is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 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, for example, 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 value of the thickness T of the sealing material 1G is not particularly limited, but may be, for example, in the range of 1 to 45%, or in the range of 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 value of the thickness T2 of the core portion 2G is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0644] [Variation 8] 11 shows a cross-sectional view of a portion of Modified Example 8 of the sealing material of the present disclosure. In the first embodiment, the upper and lower surfaces of the core 2H are linear (flat) in cross section, but in Modified Example 8, the upper and lower surfaces of the core 2H have recesses. The other materials and configurations are the same as those of the first embodiment, and therefore a description thereof will be omitted.

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

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

[0647] In cross section, the thickness of the end regions of the core 2H is greater than the thickness of the regions other than the end regions. The above-described configuration of the core 2H facilitates manufacturing, preventing, for example, leakage of a composition containing the material constituting the first covering portion 3H or misalignment of a sheet formed from the material constituting the first covering portion 3H during manufacturing. Here, the end regions refer to the regions extending from each end to a position 20% of the length of the core 2H (i.e., the length in the X direction in FIG. 11), and the regions other than the end regions refer to the remaining regions. The recesses are not limited to the illustrated example, and may have any shape as long as the thickness of the end regions of the core 2H is greater than the thickness of the regions other than the end regions.

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

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

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

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

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

[0653] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3H to the maximum value of the thickness T2 of the core portion 2H is not particularly limited, but may be, for example, in the range of 1 to 49%, or in the range of 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 value of the thickness T of the sealing material 1H is not particularly limited, but may be, for example, in the range of 1 to 49%, or in the range of 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, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0656] [Variation 9] 12 shows a cross-sectional view of a portion of Modified Example 9 of the sealing material of the present disclosure. In the first embodiment, the core 2 is rectangular in cross section, but in Modified Example 9, the inner end region of the core 2I is shifted upward and the outer end region is shifted downward, i.e., 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 configuration are the same as in the first embodiment, and therefore a description thereof will be omitted.

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

[0658] On the upper surface of the cross section of the core 2I, the outer end is located at the lowest position, the inner end is located at the highest position, and the region therebetween is located therebetween. Similarly, on the lower surface of the cross section of the core 2I, the outer end is located at the lowest position, the inner end is located at the highest position, and the region therebetween (central region) is located therebetween. By having the core 2I have the above configuration, it may be easier to check for twisting or misalignment when installing the sealing material 1I. Note that on the lower surface of the cross section of the core 2I, the outer end may be located at the highest position, the inner end may be located at the lowest position, and the region therebetween may be located therebetween.

[0659] In the cross section, the ratio of the length L3 of the central region to the maximum length of the core 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 may be in the range of 60 to 90%. By having the above configuration, good sealing properties are maintained even at low temperatures.

[0660] In the cross section, the ratio of the thickness T2 of the core 2I (thickness parallel to the Z axis) to the maximum value of the thickness T of the sealing material 1I is not particularly limited, but may be, for example, in the range of 1 to 98%, or in the range of 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, for example, in the range of 90 to 170° or in the range of 110 to 170°.

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

[0663] In the cross section, the ratio of the thickness T1 of the first covering portion 3I to the maximum value of the 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, for example, in the range of 1 to 49%, or in the range of 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 (the thickness T2 of the central region of the core portion 2I) is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0665] [Variation 10] FIG. 13 shows a cross-sectional view of a portion of a sealing material according to a tenth modification of the present disclosure. In the first embodiment, the core 2J was rectangular in cross section. However, in this tenth modification, the upper surface of the core 2J has a flat surface and an inclined surface sloping upward from the flat surface toward the inner or outer end surface, and the lower surface of the core 2J has a flat surface and an inclined surface sloping downward from the flat surface toward the inner or outer end surface. That is, the core 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 refers to a portion that is thicker than the first portion. The first portion has a constant thickness, i.e., the upper and lower surfaces are flat. The thickness of the core 2J gradually increases toward the ends, reaching its maximum at the ends. Other materials and configurations are the same as those of the first embodiment, and therefore a description thereof will be omitted.

[0666] 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 FIG. 13, the right side of the paper surface is the inside of the sealing material 1J, and the left side of the paper surface is the outside of the sealing material 1J.

[0667] In cross section, the core 2J has a first portion and two extended portions connected to both ends of the first portion. That is, the core 2J has a first extended portion that slopes linearly from one end of the first portion toward the inner end face and has a thickness (thickness in the Z direction) 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 has a thickness greater than that of the first portion toward the outer end face, and a first portion that connects the first extended portion and the second extended portion and has a constant thickness. The thicknesses of the first extended portion and the second extended portion gradually increase toward the end sides. 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 unevenness.

[0668] The maximum value of the thickness T2 of each of the first and second expansion portions is greater than the thickness T3 of the first portion. This configuration facilitates the manufacture of the core portion 2J, and can prevent, for example, leakage of a composition containing the material that constitutes the first covering portion 3J or misalignment of a sheet formed from the first covering portion 3J during manufacture. The ratio of the thickness T3 to the maximum value of the thickness T2 is not particularly limited, but may be, for example, in the range of 10 to 99% or 40 to 90%.

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

[0670] In cross section, the thickness of the end region of the core portion 2J is greater than the thickness of the region other than the end region. In cross section, the thickness T2 of each of the inner and outer peripheral surfaces of the core portion 2J is greater than the thickness T3 of the first portion of the core portion 2H. Here, the end region refers to the region included within 20% of one end of the average length of the core portion 2J in the X direction (100%), and the region other than the end region refers to the other region. Note that in the following modified examples, the end region and the region other than the end region have the same meaning as above. Note that each end region may include only the first extended portion or the second extended portion, or may include both the first extended portion or the second extended portion and a portion of the first portion, or may include only a portion of the first extended portion or the second extended portion.

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

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

[0673] In the cross section, the ratio of the thickness T2 of each of the two end portions of the core portion 2J to the maximum value of the thickness T of the sealing material 1J is not particularly limited, but may be, for example, in the range of 10 to 90% or 20 to 70%.

[0674] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3J to the thickness T2 of the core portion 2J is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 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 value of the thickness T of the sealing material 1J may be, for example, in the range of 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, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0677] [Variation 11] 14 shows a cross-sectional view of a portion of Variation 11 of the sealing material of the present disclosure. In Variation 10, the first covering portion 3J is positioned so as to cover the entire upper and lower surfaces of the core portion 2J in the cross section, whereas in Variation 11, the first covering portion 3K is positioned so as to cover a portion of the upper surface and a portion of the lower surface of the core portion 2K. Specifically, in Variation 11, the first covering portion 3K is provided on a portion of the upper surface and a portion of the lower surface of a first portion of the core portion 2K. The other materials and configuration are the same as in Variation 10, and therefore a description thereof will be omitted.

[0678] 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 FIG. 1K, the right side of the paper surface is the inside of the sealing material 1K, and the left side of the paper surface is the outside of the sealing material 1K.

[0679] The core 2K has the same configuration as the core 2J of the tenth modification.

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

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

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

[0683] The maximum value of the thickness T2 of each of the first and second expansion portions is greater than the thickness T3 of the first portion. This configuration facilitates the manufacture of the core portion 2J, and can prevent, for example, leakage of a composition containing the material that constitutes the first covering portion 3J or misalignment of a sheet formed from the first covering portion 3J during manufacture. The ratio of the thickness T3 to the maximum value of the thickness T2 is not particularly limited, but may be, for example, in the range of 10 to 99% or 40 to 90%.

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

[0685] The ratio of the thickness T4 of the first covering portion 3K protruding from the core portion 2K to the maximum value of the thickness T2 of the core portion 2K when viewed from the inside is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%. By having the above configuration, the sealing property of the sealing material 1K is improved.

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

[0687] [Variation 12] Figure 15 shows a cross-sectional view of a portion of modified example 12 of the sealing material of the present disclosure. In the first embodiment, the upper and lower surfaces of the core 2L in the cross section were straight (flat), but in this modified example 12, the upper surface of the core 2L has an inclined surface that slopes upward from the center toward the inner end surface or the outer end surface, and the lower surface of the core 2L has an inclined surface that slopes downward from the center toward the inner end surface or the outer end surface. In other words, the thickness of the center is greater than the thickness at the inner end surface and the outer end surface. The other materials and configuration are the same as those of the first embodiment, and their description will be omitted.

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

[0689] In cross section, the core portion 2L has a first extended portion that slopes linearly from the center toward the inner end face and becomes thicker than the center portion toward the inner end face, and a second extended portion that slopes linearly from the center toward the outer end face and becomes thicker than the center portion toward the outer end face. The first extended portion and the second extended portion are connected to form the core portion 2L. The connecting portion between the two is located at the center of the length of the core portion 2L in the X direction. The above-described configuration of the core portion 2L facilitates manufacturing and, for example, prevents leakage of the composition containing the material that constitutes the first covering portion 3L or misalignment of the sheet formed from the material that constitutes the first covering portion 3L during manufacturing.

[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 expansion portion and the second expansion portion (thickness at the inner end surface or outer end surface) is not particularly limited, but may be, for example, in the range of 10 to 99%, and specifically may be in the range of 40 to 90%.

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

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

[0693] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3L to the maximum value of the thickness T2 of the core portion 2L is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 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 value of the thickness T of the sealing material 1L is not particularly limited, but may be, for example, in the range of 1 to 49%, or in the range of 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, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

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

[0697] [Variation 13] 16 shows a cross-sectional view of a portion of Modified Example 13 of the sealing material of the present disclosure. In Modified Example 12, the first covering portion 3L is positioned so as to cover the entire upper and lower surfaces of the core portion 2L in the cross section, whereas in Modified Example 13, the first covering portion 3M is positioned so as to cover a portion of the upper surface and a portion of the lower surface of the core portion 2M. Specifically, in Modified Example 13, the first covering portion 3M is provided on the upper surface and a portion of the lower surface of the central portion of the core portion 2M. The other materials and configuration are the same as in Modified Example 12, and therefore a description thereof will be omitted.

[0698] As shown in Fig. 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 Fig. 16, the right side of the paper surface is the inside of the sealing material 1M, and the left side of the paper surface is the outside of the sealing material 1M.

[0699] The core 2M has the same configuration as the core 2K of the twelfth modification.

[0700] In cross section, the two first covering portions 3M are positioned so as to cover the connecting portion between the first and second expanding portions and the surrounding area, i.e., the two first covering portions 3M cover only the connecting portions and the surrounding area on the upper and lower surfaces of the core portion 2M.

[0701] In the 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, for example, in the range of 10 to 99%, or in the range of 20 to 90%.

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

[0703] In the cross section, the ratio of the maximum value of the thickness T1 of the first covering portion 3M to the maximum value of the thickness T2 of the core portion 2M is not particularly limited, but may be, for example, in the range of 2 to 1000%, or in the range of 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 value of the thickness T2 of the core portion 2M is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 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 value of the thickness T of the sealing material 1M is not particularly limited, but may be, for example, in the range of 1 to 49%, or in the range of 10 to 45%.

[0706] [Variation 14] FIG. 17 shows a cross-sectional view of a portion of a sealant of Variation 1N of the present disclosure. While the core 2A of Variation 1 was rectangular in cross section, the core 2N of Variation 14 is H-shaped. Specifically, in cross section, the core 2N has a first portion extending inward of the sealant 1N, a second portion extending outward of the sealant 1N, and a third portion connecting a portion of the first portion and a portion of the second portion, parallel to the X-axis, and passing through the centers of the upper and lower surfaces of the sealant 1N. The other materials and configuration are the same as those of Variation 1, and a description thereof will be omitted. This configuration reduces internal permeation and improves sealing performance. Furthermore, favorable effects can be achieved in terms of multi-function, such as improved solvent resistance, corrosion resistance, and radical resistance of the sealant.

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

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

[0709] In the cross section, the ratio of the maximum length L1 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, for example, in the range of 10 to 100%, or in the range of 20 to 95%.

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

[0711] In the 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, for example, in the range of 1 to 49%, or in the range of 10 to 45%.

[0712] In the cross section, the ratio of the maximum thickness T2 of the core 2N to the maximum thickness T of the sealing material 1N is not particularly limited, but may be, for example, in the range of 1 to 98%, or in the range of 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, for example, in the range of 10 to 99% or in the range of 40 to 90%. Note that 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, for example, in the range of 2 to 10,000%, or in the range of 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 value of the thickness T of the sealing material 1N is not particularly limited, but may be, for example, in the range of 1 to 49%, or in the range of 10 to 45%.

[0716] [Variation 15] 18 shows a cross-sectional view of a portion of modified example 1P of the sealing material of the present disclosure. In modified example 1, core 2A was rectangular in cross section, but in modified example 15, core 2P is diamond-shaped with the thickness greatest at the center. The other materials and configuration are the same as modified example 1, and therefore a description thereof will be omitted.

[0717] As shown in Fig. 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 Fig. 18, the right side of the paper surface is the inside of the sealing material 1P, and the left side of the paper surface is the outside of the sealing material 1P.

[0718] In cross section, the core portion 2P is rhombic. 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 modification, 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 at the center, i.e., a diagonal parallel to the Z-axis.

[0719] In the cross section, the maximum length of the core 2P in the X direction (length L of the sealing material 1P) and the maximum thickness of the core 2P (length of the diagonal perpendicular to the annular plane of the core 2P) are not particularly limited, but may be, for example, 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 part of the central portion.

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

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

[0723] In the cross section, the ratio of the maximum thickness T2 of the core 2P in the Z-axis direction (the length of the diagonal perpendicular to the circular plane of the core 2P) to the maximum thickness T of the sealing material 1P is not particularly limited, but may be, for example, in the range of 1 to 98%, or in the range of 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 line of the core portion 2P perpendicular to the annular plane) is not particularly limited, but may be, for example, in the range of 2 to 10,000%, or in the range of 6 to 450%.

[0725] [Variation 16] FIG. 19 shows a partial cross-sectional view of a sealing material according to a sixth modification of the present disclosure. As shown in FIG. 19, the sealing material 1Q includes a core 2Q and a first covering portion 3Q located on the surface of the core 2Q. In FIG. 19, the right side of the drawing represents the inside of the sealing material 1Q, and the left side represents the outside of the sealing material 1Q. In this sixth modification, the core 2Q has an inner opening toward the inside of the sealing material 1Q, and the shape including the inner opening is trapezoidal. In cross section, the core 2Q has a first portion and a second portion (the upper and lower bases of the trapezoid) that face each other, and a connecting portion that connects the outer ends of these portions. In cross section, the first portion is located above the second portion and is shorter than the second portion. The first and second portions have end faces 21Q and 22Q, respectively, facing inward of the sealing material 1Q. The end face 21Q of the first portion and the end face 22Q of the second portion are flush with each other. The connecting portion is inclined with respect to the Z axis, with the first portion positioned closer to the inner side of the sealing material. The sealing material 1Q has two first covering portions 3Q. One of the first covering portions 3Q is located on the first portion and covers part of the upper surface of the core portion 2Q. The other first covering portion 3Q is located on the second portion and covers part 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 those of Variation 1, and therefore a description thereof will be omitted. The above configuration reduces the torque required for compression. The connecting portion, the first portion, and the second portion may each have a curved portion. The length of the second portion may be shorter than or the same as the length of the first portion.

[0726] The opening distance TQ of the inner opening of the core 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 2Q is not particularly limited, but may be, for example, in the range of 30 to 100%, or in the range of 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, for example, in the range of 10% to 99%, or in the range of 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, for example, in the range of 10% to 99%, or in the range of 20% to 95%.

[0729] In the cross section, the ratio of the thickness T1 of the first covering portion 3Q to the maximum value of the thickness T of the sealing material 1Q is not particularly limited, but may be, for example, 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, for example, in the range of 2 to 1,000%, and specifically, in the range of 30 to 300%.

[0731] Second Embodiment Fig. 20 is a plan view showing a sealing material 1R of a second embodiment of the present disclosure. Fig. 21 is a cross-sectional view taken along line XXI-XXI of Fig. 20. In the cross-section, the core portion 2R of the second embodiment has a cross shape. Note that the composition and effect of the core portion and the first covering portion are the same as those of the first embodiment, and therefore a description thereof will be omitted.

[0732] 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 FIG. 21, the right side of the paper surface is the inside of the sealing material 1R, and the left side of the paper surface is the outside of the sealing material 1R.

[0733] As shown in Fig. 21, the sealing material 1R is circular. Note that the sealing material 1R may be substantially 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 (FIG. 20), from the inside, 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 FIG. 21, as viewed from the inside of the seal material 1R, from the bottom (bottom of the page), 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. With the above-described configuration, the sealing performance can be maintained even if the sealing position is displaced due to twisting or the like during installation, and the reliability of the sealing material 1R can be improved.

[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°. That is, the angle θ3 may take any value between more than 0° and less than 90°.

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

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

[0738] In the 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 sealing material 1R to the maximum length L of sealing material 1R is not particularly limited, but may be, for example, in the range of 10 to 90%, and specifically may be in the range of 20 to 80%.

[0739] In the cross section, the ratio of the thickness T1 of the first covering portion 3R to the maximum value of the thickness T of the sealing material 1R is not particularly limited, but may be, for example, in the range of 1 to 49%, or in the range of 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, for example, in the range of 10 to 1000%, or in the range of 50 to 500%.

[0741] In the cross section, 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 T of the sealing material 1R is not particularly limited, but may be, for example, in the range of 1 to 40%, or in the range of 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, for example, in the range of 1 to 500%, or in the range of 10 to 300%.

[0743] <Third embodiment> FIG. 22 is a plan view of a second embodiment of the sealing material of the present disclosure. FIG. 23 is a cross-sectional view taken along line XXIII-XXIII of FIG. 22. In the first embodiment, the core portion 2 was annular, but in this third embodiment, the core portion 2S is sheet-shaped. A sheet-shaped shape refers to a shape 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 length and width or diameter of the main surfaces are 10 times larger than the thickness. This different configuration is explained below. The other materials and configuration are the same as in the first embodiment, and therefore explanations thereof are omitted.

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

[0745] The core portion 2S is parallel to the XY plane, has a sheet shape with only a flat surface, and has an opening 4 penetrating in the thickness direction. As shown in Figures 22 and 23, the core portion 2S is larger in area than 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 portion 2S in the X direction (length L of the sealing material 1S in the X direction) may be, for example, in the range of 10 to 1000 mm, specifically in the range of 30 to 500 mm. The maximum length of the core portion 2S in the Y direction may be, for example, in the range of 10 to 1000 mm, specifically in the range of 30 to 500 mm. The maximum thickness T2 of the core portion 2S may be, for example, 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 the present disclosure has a first covering portion 3S on the surface of a 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, as shown in Figure 23, there are two first covering portions 3S.

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

[0749] 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 connected to the core portion 2S on the inner circumferential surface, i.e., there is no step at the boundary between them. However, the first covering portions 3S and the core portion 2S may not be continuous on the inner circumferential surface, and there may be a step at the boundary between them.

[0750] 22 and 23, the maximum length L1 of the first covering portion 3S in the X direction may be, for example, 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, for example, 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, for example, in the range of 0.1 to 10 mm, specifically in the range of 0.5 to 3 mm.

[0751] In the cross section (FIG. 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, for example, in the range of 0.05 to 100%, or in the range of 1 to 50%.

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

[0753] In the 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, for example, in the range of 1 to 10,000%, and specifically, in the range of 6 to 450%.

[0754] In Figure 22, as an example, only one first covering portion 3S is provided, but there is no limit to the number, and multiple first covering portions 3S, for example, two or more first covering portions 3S, may be provided, and 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 forms and may have other forms. For example, they may have the forms of the above-described modified examples. For example, the core portion 2S may have the form of modified examples 2, 6 to 10, 12, or 14.

[0756] [Method of manufacturing sealant 1S] The method for manufacturing the sealing material 1S of the third embodiment can be performed in the same manner as the method for manufacturing the sealing material 1 of the first embodiment.

[0757] Although the embodiments have been described above, it will be understood that various changes in form and details can be made without departing from the spirit and scope of the claims.

[0758] For example, the first covering portion 3 may have 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] In the examples illustrated in the first embodiment, modified examples 1 to 16, second embodiment, and third embodiment, the upper and lower sides are symmetrical, but this is not limiting. [Example]

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

[0761] <Preparation of Curing Composition 1> 100 parts by weight of compound (A), 2 parts by weight of tetraethoxysilane as a crosslinking agent, and 2 parts by weight of tetraisopropoxy titanate as a curing catalyst were weighed into a glass mixing vessel, and the mixture was stirred and mixed to prepare a curable composition. Further, carbon black (nitrogen adsorption specific surface area 50 g / m) was added. 2) was added to the mixture, and the mixture was mixed uniformly using a planetary mixer to obtain a curable composition 1. The blending ratios are shown in the table below.

[0762] [Table 1]

[0763] <Preparation of Curing Composition 2> Compound (B) was used instead of compound (A), methyltrimethoxysilane was used instead of tetraethoxysilane as a crosslinker, and surface-hydrophobic silica (nitrogen adsorption specific surface area 120 g / m) was used instead of carbon black. 2 ) was used to prepare curable composition 2 in the same manner as curable composition 1. The blending 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 (with a nitrogen adsorption specific surface area of ​​70 g / m) was used instead of carbon black. 2 ) was used to prepare curable composition 2 in the same manner as curable composition 1. The blending ratios are shown in the table below.

[0766] [Table 3]

[0767] <Preparation of Curing Composition 4> Thermosetting System 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 were weighed into a glass mixing vessel, and the mixture was stirred to prepare a curable composition. Furthermore, carbon black (nitrogen adsorption specific surface area 130 g / m) was added. 2 ) was added and mixed uniformly using a planetary mixer to obtain a curing composition 4. The blending ratios are shown in the table below.

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

[0769] <Preparation of sealing material embodiment 1> Example 1 An O-ring (outer diameter 38 mm, inner diameter 31 mm, wire diameter 3.5 mm) made of FFKM (hardness A70) was prepared as the core. Before application, the surface of the core was cleaned using an atmospheric pressure plasma generator, which generated plasma using dry air at 0.4 MPa. After cleaning, a circle with a diameter of 35 mm was applied to one surface of the O-ring (the upper surface of the core) using an air dispenser using the curing composition 1. The thickness of the applied composition was adjusted to 0.3 mm (Example 1-1), 0.7 mm (Example 1-2), or 1.0 mm (Example 1-3). The composition was then left to stand at room temperature for 24 hours, and the applied liquid was allowed to harden until it was fixed. Thereafter, a circle with a diameter of 35 mm was similarly applied and drawn on the opposite surface of the O-ring (the underside of the core) using an air dispenser, and the sealant was then cured at room temperature to prepare the sealant. The cross section of the obtained sealing material had the shape shown in Fig. 5. In Fig. 5, L = 3.5 mm, T2 = 3.5 mm, and T1 = 0.3 mm (Example 1-1), 0.7 mm (Example 1-2), and 1.0 mm (Example 1-3).

[0770] <Preparation of sealing material embodiment 2> Example 2 A 5cm long, 1mm thick sheet of FFKM (hardness A70) was prepared as the core. Before application, the surface was cleaned using an atmospheric pressure plasma generator, which generated plasma using dry air at 0.4 MPa. Curing composition 1 was applied to one side (upper surface of the core) of the washed FFKM sheet and a circle with a diameter of 35 mm was drawn using 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 sheet was then left to stand at room temperature for 24 hours, and the applied liquid was allowed to harden until it was fixed. Subsequently, a 35 mm diameter circle 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 side were perfectly aligned with the FFKM sheet in between. The FFKM sheet was then cut along the edge of the applied circle to obtain a ring-shaped sealing material with an outer diameter of 3.9 cm and an inner diameter of 3.2 cm. The cross section of the obtained sealing material had the shape shown in Figure 2. In Figure 2, L = 3.5 mm, T2 = 1 mm, and T1 = 0.3 mm (Example 2-1), 0.7 mm (Example 2-2), 1.0 mm (Example 2-3), and 1.3 mm (Example 2-4).

[0771] Examples 3 to 7 In Examples 3 to 7, each sealing material was prepared using the core and curable composition shown in the table, and the same operation as in Example 2 was carried out. The cores used in Examples 3 to 7 were 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 in the same manner as in Example 2, except that NBR70 was used for the core and curable composition 4 was used for the coating, and heat treatment was carried out at 150°C for 1 hour during curing.

[0773] <Preparation of sealing material embodiment 3> Example 9 A core made of FFKM70 and having the shape shown in Fig. 13 was prepared. The core had an outer diameter of 38 mm, an inner diameter of 31 mm, and in cross section, T2 = 1.2 mm, T3 = 0.8 mm, L = 3.5 mm, and L3 = 2.5 mm. Curable 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 applied width of curable composition 1 (length L of the sealing material in Figure 13) was 3.5 mm, and the thickness (T1) was 1.6 mm. The same coating was applied to the underside of the core and cured at room temperature to obtain a ring-shaped sealing material.

[0774] <Preparation of sealing material embodiment 4> Example 10 A core made of FFKM70 and having the shape shown in Fig. 16 was prepared. The core had an outer diameter of 38 mm and an inner diameter of 31 mm, and in cross section, T2 = 1.2 mm, T3 = 0.5 mm, L = 3.5 mm, and L1 = 3.1 mm. Curable 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 applied width of curable composition 1 (length L1 of the sealing material in Figure 16) was 3.5 mm, and the thickness (T1) was 1.7 mm. The same coating was applied to the underside of the core and cured at room temperature to obtain a ring-shaped sealing material.

[0775] (Comparative Example) An O-ring having the same hardness as the core used in the production of the example was used to carry out the same evaluation as in the example.

[0776] <Evaluation conditions> [Evaluation of core and coating] The physical properties of the various materials in the core and coating were evaluated under the following conditions.

[0777] (Tg) A rectangular sample with a thickness of 0.5 mm, width of 1 mm, and length of 20 mm was prepared, and the storage modulus was measured using a dynamic viscoelasticity analyzer (DMA, DMA1, manufactured by Mettler) under tensile conditions with a temperature drop rate of 5°C / min and a frequency of 1 Hz. From the obtained plot of storage modulus at each temperature, the point where the material transitions from the glass region to the rubber-like transition region (the point where the storage modulus begins to drop) was read and taken as Tg.

[0778] (Shore hardness) Shore hardness was measured using a Shore hardness tester A (Shore hardness tester D type A, manufactured by Kobunshi Keiki Co., Ltd.). Each sample was evaluated in triplicate, and the average value was used as the result.

[0779] [Sealing material evaluation] The obtained sealing material was evaluated for leak temperature and compression set under the following conditions.

[0780] (Evaluation of leak temperature) Explanation of the evaluation device (HELIOT900, manufactured by ULVAC): A leak test fixture 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 the coated 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 specified rate (10% or 25% compression). The space separated by the metal plate and the sealant was depressurized to a vacuum using a pump. By flowing helium gas around the outside of the leak test fixture, the amount of helium leaking into the interior through the sealant was evaluated. Leak temperature assessment; The above evaluation device was assembled in a temperature-controllable cooling bath, and the sealing material was placed at room temperature to achieve the specified compression ratio. The pump was then turned on and the pressure in the system was reduced for 30 minutes to stabilize, confirming that the He permeation rate was constant. In this state, the temperature of the cooling bath was lowered to the maximum cooling temperature of -75°C. If the sealing material loses its sealing function due to cooling, the amount of helium inflow will rise sharply. This temperature was evaluated as the leak temperature. Compression rate (%) = compression amount / original seal height Compression set rating: The sealant was placed between an evaluation jig consisting of two metal plates with the coated part in contact with the metal plate, and the metal plates were fastened together with bolts to compress the sealant by 25%. In this state, it was placed in a freezer at -70°C and the shape was maintained for 500 hours. After 500 hours, the sealant was removed and returned to room temperature, and the thickness was measured and the compression set was evaluated using the following formula. Compression set (%) = change before and after test / compression amount x 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] Example 1 (Examples 1-1 to 1-3) had a low permanent compression set similar to that of Comparative Example 1, and had a lower leak temperature than Comparative Example 1. It was found that the sealing material of Example 1 had better sealing properties at low temperatures than the sealing material of Comparative Example 1. In Example 2 (Examples 2-1 to 2-4), a core having the same composition as Example 1 was used. Even though the shape of the core was different, the leak temperature was lower while maintaining the same permanent compression set as Example 1. It was found that the sealing material of Example 2 had superior sealing properties at lower temperatures. In Example 3 (Examples 3-1 to 3-4), a rubber having a different composition from that of Example 2 was used as the core. Even though the composition of the core was different, the leak temperature was low. Furthermore, Example 3 had a lower leak temperature than Comparative Example 2, and the permanent compression set value was also lower than Comparative Example 2. It was found that the sealing material of Example 3 had excellent sealing properties at low temperatures. In Example 4 (Examples 4-1 to 4-4), a core having a different Shore hardness from that of Example 3 was used. The sealing material of Example 4 had a lower leak temperature than that of Comparative Example 3, and the value of permanent compression set was also lower than that of Comparative Example 2. It was found that the sealing material of Example 4 had excellent sealing properties at low temperatures. In Example 5 (Examples 5-1 to 5-4), a rubber having a different structure from that of Examples 3 and 4 was used as the core. Example 5 had a low permanent compression set similar to Comparative Example 4 (4-1 to 4-2), and had a lower leak temperature than Comparative Example 4. It was found that the sealing material of Example 5 had better sealing properties at low temperatures than the sealing material of Comparative Example 4. In Examples 6 to 8, coatings with different configurations were provided. It was found that even if the configuration of the coating was different, it was possible to have a low leak temperature and a low permanent compression set value. It was found that Examples 6 to 8 had excellent sealing properties at low temperatures. In Examples 9 and 10, the shape of the core is different from that of Example 1. As shown in Examples 9 and 10, it was found that even if the shape of the core is different, it is possible to have a low leak temperature and a low permanent compression set value. It was found that Examples 9 and 10 had excellent sealing properties at low temperatures. [Industrial Applicability]

[0790] The present invention can be suitably used as a sealing material that has good sealing properties 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 Sealing material 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 convex part 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 Inner opening diameter θ1, θ2, θ3 angles

Claims

1. a core portion and a first covering portion located on a surface of the core portion, A sealing material, wherein the glass transition point of the material constituting the first covering portion is lower than the glass transition point 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. 3. The sealing material according to claim 1, wherein the first covering portion has a glass transition temperature of −30° C. or lower.

4. 3. The sealing material according to claim 1, wherein a Shore hardness HS1 of the first coating portion at room temperature and a Shore hardness HS2 of the core portion at room temperature satisfy a relationship of HS1≦HS2+20.

5. The sealing material according to claim 1 , wherein the material constituting the first covering portion is a resin.

6. The sealing material according to claim 1 or 2, wherein the sealing material has an opening.

7. The sealing material according to claim 1 or 2, wherein the sealing material is annular.

8. The sealing material according to claim 1 , wherein the first covering portion has a convex shape with respect to a sealing direction of the sealing material.

9. The sealing material according to claim 7 , wherein the core portion has a circular or elliptical shape 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 a contact portion with the first cover portion.

11. The sealing material according to claim 7 , wherein the core portion includes a rectangular shape 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 portion is greater than the thickness of the region other than the end region.

13. 3. The sealing material according to claim 1, wherein the core is made of at least one material selected from the group consisting of fluororesin, silicone compound, nitrile rubber, and fluororubber.

14. 3. The sealing material according to claim 1, wherein the maximum thickness of the core is in the range of 0.05 to 10 mm.

15. 3. The sealing material according to claim 1, wherein the first coating portion comprises at least one selected from the group consisting of perfluoropolyether, fluorosilicone, diphenylsiloxane, methylphenylsiloxane, and dimethylsiloxane.

16. 3. The sealing material according to claim 1, wherein the first coating portion is formed from 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.

17. 3. The sealing material according to claim 1, wherein the first covering portion has a thickness 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 are different in color.

19. The sealing material according to claim 1 or 2, further comprising an adhesive layer that bonds the core portion and the first covering portion together.

20. The sealing material according to claim 1 or 2, wherein the core portion further has a roughened surface on a surface that comes into contact with the first covering portion.

21. The sealing material according to claim 1 or 2, further comprising a second covering portion located on the first covering portion.

22. The sealing material according to claim 1 or 2, which is for low-temperature sealing.

23. A method for manufacturing the sealing material according to claim 1, a coating step of coating a composition containing a material constituting the first coating portion onto the core portion; A method for producing a sealing material, comprising:

24. a coating step of performing at least one treatment selected from the group consisting of plasma treatment, corona treatment, ultraviolet treatment, and alkali treatment on the core portion, and then coating a composition containing a material that constitutes the first coating portion; The method for producing the sealing material according to claim 23, comprising:

25. a molding step of injecting a composition containing a material constituting the first covering portion onto the core portion provided in a molding frame and performing cast molding; The method for producing the sealing material according to claim 23 or 24, comprising:

26. A method for manufacturing the sealing material according to claim 1, a first sheet molding step of molding a material constituting the core into a sheet shape to form a first sheet; a second sheet molding step of molding the material constituting the first covering portion into a sheet shape to form a second sheet; and a sheet arranging step of arranging the first sheet and the second sheet in a stacked manner in a molding frame; A method for producing a sealing material, comprising:

27. a curing step of curing at least one of the first sheet and the second sheet by heat treatment or light irradiation treatment after the disposing step. The method for producing the sealing material according to claim 26, comprising:

28. A processing step of processing the hardened product into a desired shape. The method for producing the sealing material according to claim 27, comprising:

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