Adhesive compositions, sheet gaskets, flooring materials, cushioning materials, and sealants

Abstract

This invention provides an adhesive composition characterized in that the adhesive composition comprises: a (co)polymer (A) comprising a polymer block of (a) methylstyrene monomer; one or more olefin polymers (B) comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes as (co)polymer blocks or their partially or fully hydrogenated blocks, wherein the content of the (c) block is greater than 87% by mass and less than 100% by mass; and one or more tackifiers (C). According to this invention, an adhesive composition capable of forming an adhesive layer with excellent adhesion at both high temperatures (above 100°C, for example 120°C) and room temperatures of around 25°C can be provided.

Description

Technical Field

[0001] This invention relates to adhesive compositions used in the formation of adhesive layers, and sheet gaskets, flooring materials, sealing materials for the interior of vehicle doors, cushioning materials for fuel tanks, sealing materials for electronic components, cushioning materials for lithium-ion batteries, sealing materials between the solar panel and support member of a solar cell module, sealing materials for electronic devices, sealing materials for electrolytic devices, and sealing materials. Background Technology

[0002] A fuel cell (FEFC) consists of an ion exchange membrane (electrolyte), an oxygen electrode, a hydrogen electrode, a support current collector, and a carbon separator with a rectifier channel on one side for gas flow and a rectifier channel on the other side for cooling water flow. The separator holds the integrated ion exchange membrane and the two electrodes to form a single cell.

[0003] Then, multiple single cells are arranged and overlapped to form a battery pack. Metal current collectors are clamped at both ends of the battery pack to form external current extraction terminals. Fastening plates are then placed through an insulating plate, and the whole assembly is fastened together with bolts to form a fuel cell.

[0004] In such fuel cell separators, gaskets are used to prevent leakage of cooling water. For example, Patent Document 1 discloses a separator structure for a fuel cell, characterized in that the separator is used in a fuel cell where electrodes are arranged on both sides of an ion exchange membrane and held between them by a separator to form a single cell, and a gasket or rubber ring is integrally bonded to the separator.

[0005] Furthermore, in electronic components used in motor vehicles, it is necessary to isolate the internal electronic component body from external gases. Therefore, sealing materials with excellent airtightness are required at the contact points between external connecting parts and the frame, and at the overlapping parts of the frames. Similarly, in electronic devices used outside of motor vehicles, it is also necessary to isolate the internal electronic component body from external gases. Therefore, sealing materials with excellent airtightness are required at the contact points between external connecting parts and the frame, and at the overlapping parts of the frames.

[0006] In addition, in order to block moisture from the outside, a sealing material with excellent sealing properties is required between the solar panel and its supporting components in solar cell modules.

[0007] In addition, in stacked lithium-ion batteries, buffer materials are provided between the stacked battery cells to follow the expansion or contraction of the battery cells and to fix each battery cell in place.

[0008] In addition, sealing materials for individual electrolytic cells are used in the electrolysis apparatus.

[0009] Existing technical documents Patent documents Patent document 1: Japanese Patent Application Publication No. 2000-156234. Summary of the Invention

[0010] The problem that the invention aims to solve In the aforementioned prior art, the sealing performance is improved by increasing the elastic modulus of the solid rubber material, which is the main material of the sealing material, and by increasing the compressive stress of the foamed rubber material.

[0011] However, if the crosslinking density of solid rubber is excessively increased to improve its elastic modulus, or the foaming rate is too low to increase the compressive stress of foamed rubber, high surface pressure may be generated at the sealing site, causing damage to other components with low strength. On the other hand, if the elastic modulus of solid rubber is reduced or the foaming rate is excessively increased to avoid generating high surface pressure at the sealing site, the sealing material may age and become larger over time.

[0012] Therefore, it is necessary to improve the sealing performance of sealing materials by methods other than increasing the elastic modulus of solid rubber materials, which are the main materials of sealing materials, and increasing the recovery rate of foamed rubber materials. One such method is to apply an adhesive layer to the surface of elastic rubber materials such as solid rubber materials and foamed rubber materials, which are the main materials of sealing materials, using an adhesive composition to improve the adhesion of the elastic rubber material to the object being sealed, thereby improving the tightness of the elastic rubber material and the object being sealed.

[0013] In addition, sealing materials can also be made of resin, metal, paper, or cork. In this case, similar to elastic rubber materials, methods to improve the sealing performance of the sealing material include: applying an adhesive layer to the surface of the resin, metal, paper, or cork material to improve the adhesion of the resin to the object being sealed, thereby improving the tightness of the seal between the resin, metal, paper, or cork material and the object being sealed.

[0014] In addition, sometimes substrates such as elastic rubber materials, resin materials, metal materials, paper materials or cork materials are not used, and only an adhesive layer formed by an adhesive composition is used as a sealing material.

[0015] In this context, automotive electronic components, solar modules, and automotive lithium-ion secondary batteries sometimes experience localized or temporary high temperatures (above 100°C, for example, 120°C) during the summer. Maintaining the seal of the adhesive composition is desirable even under demanding sealing conditions at temperatures around 120°C. Additionally, electrolysis devices sometimes also experience high temperatures.

[0016] Furthermore, for sealing materials formed by adhesive layers consisting solely of adhesive compositions, there is a need for sealing materials that exhibit excellent sealing performance not only at room temperature (around 25°C) but also at high temperatures (above 100°C, such as 120°C). Therefore, for sealing materials formed by adhesive layers consisting solely of adhesive compositions, there is a need for adhesive layers that exhibit excellent adhesion not only at room temperature (around 25°C) but also at high temperatures (above 100°C, such as 120°C).

[0017] Therefore, there is a need for sealing materials that have excellent sealing properties not only at room temperature (around 25°C) but also at high temperatures (above 100°C, such as 120°C). Thus, among sealing materials that have an adhesive layer on elastic rubber or resin materials, metal materials, paper materials, and cork materials, there is a need for an adhesive layer that has excellent adhesion not only at room temperature (around 25°C) but also at high temperatures (above 100°C, such as 120°C).

[0018] Therefore, the object of the present invention is either (1) or (2) below.

[0019] (1) Provides an adhesive composition for forming an adhesive layer on the surface of an elastic rubber material, resin material, metal material, paper material or cork material that is the main material of the sealing material, the adhesive composition being capable of forming an adhesive layer with excellent adhesion at both high temperature (above 100°C, for example 120°C) and room temperature of around 25°C.

[0020] (2) Provides an adhesive composition for forming an adhesive layer in a sealing material formed solely by the adhesive composition, the adhesive composition being capable of forming an adhesive layer with excellent adhesion at both high temperatures (above 100°C, for example 120°C) and normal temperatures of around 25°C.

[0021] means for solving problems The above problem can be solved as follows.

[0022] That is, the present invention (1) provides an adhesive composition, characterized in that, The adhesive composition contains: (Co)polymer (A), which contains a polymer block of (a) methylstyrene monomer; One or more olefin polymers (B) comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partially or fully hydride blocks, wherein the content of the block (c) is greater than 87% by mass and less than 100% by mass based on monomers; and One or more of the thickeners (C).

[0023] In addition, the present invention (2) provides an adhesive composition of (1), characterized in that the (co)polymer (A) is a copolymer of (co)polymer blocks containing (b) one or more aliphatic monoolefins and / or one or more aliphatic conjugated dienes or of some or all hydrogenated blocks thereof.

[0024] In addition, the present invention (3) provides an adhesive composition of (1) or (2), characterized in that the content of the (co)polymer (A) is in the ratio of the total content of the (co)polymer (A) and the olefin polymer (B) ((co)polymer (A) / (co)polymer (A) + olefin polymer (B)))×100) to 5 to 95 by mass.

[0025] In addition, the present invention (4) provides an adhesive composition of any one of (1) to (3), characterized in that the olefin polymer (B) is a (co)polymer of one or more α-olefins selected from ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene and 1-decene, or a copolymer of one or more α-olefins selected from ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene and 1-decene with one or more aliphatic polyene compounds selected from ethylidene norbornene, dicyclopentadiene, hexadiene, vinyl norbornene, butadiene and isoprene.

[0026] In addition, the present invention (5) provides an adhesive composition of any one of (1) to (4), characterized in that the olefin polymer (B) is a diene rubber selected from butyl rubber, natural rubber, isoprene rubber, butadiene rubber and styrene-butadiene rubber, or a partially or fully hydrogenated diene rubber thereof.

[0027] In addition, the present invention (6) provides an adhesive composition of any one of (1) to (5), characterized in that the tackifier (C) is selected from one or more of terpene phenolic resin, hydrogenated terpene phenolic resin, phenolic resin, xylene resin and rosin-based resin.

[0028] In addition, the present invention (7) provides an adhesive composition of any one of (1) to (6), characterized in that it contains one or more copolymers (F), wherein the copolymers (F) are aromatic copolymers selected from polyphenylene ether copolymers, styrene-maleic anhydride copolymers, styrene-N-phenylmaleimide copolymers, and styrene-N-phenylmaleimide copolymer-maleic anhydride copolymers, and have a glass transition temperature of 140°C or higher.

[0029] In addition, the present invention (8) provides an adhesive composition of any one of (1) to (7), characterized in that the content of α-methylstyrene units of the (co)polymer (A) is 10 to 40 by mass based on monomers.

[0030] In addition, the present invention (9) provides an adhesive composition of any one of (1) to (8), characterized in that (b) is a copolymer block or a partial or complete hydrogenated block of one or more monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene.

[0031] In addition, the present invention (10) provides an adhesive composition of any one of (1) to (9), characterized in that the (co)polymer (A) is a triblock copolymer composed of a polymer block of (a) α-methylstyrene monomer - (b) a copolymer block of one or more monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene or a partially or fully hydride block of (a) α-methylstyrene monomer.

[0032] In addition, the present invention (11) provides a sheet gasket characterized in that it contains: a (co)polymer (A) comprising a polymer block of (a) methylstyrene monomer; an olefin polymer (B) comprising a (co)polymer block of (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes or a partially or fully hydrogenated block thereof; and a tackifier (C) having a peel strength value at 25°C, a peel strength value at 25°C, a peel strength value at 100°C, and a peel strength value at 120°C of the adhesive composition (R) that are all 2.50 or more, wherein the adhesive composition (R) is composed of 100 parts by mass of a hydrogenated α-methylstyrene-butadiene block copolymer having an α-methylstyrene unit content of 29% by mass based on monomer, and 50 parts by mass of a terpene phenolic resin as an adhesive.

[0033] In addition, the present invention (12) provides a sheet gasket, characterized in that the sheet gasket has an adhesive layer formed of an adhesive composition of any one of (1) to (11).

[0034] In addition, the present invention (13) provides a flooring material, characterized in that the flooring material has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0035] The present invention (14) provides a sealing material for the interior of a vehicle door, characterized in that the sealing material for the interior of the vehicle door has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0036] The present invention (15) provides a buffer material for a fuel tank, characterized in that the buffer material for the fuel tank has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0037] The present invention (16) provides a sealing material for an electronic component, characterized in that the sealing material for the electronic component has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0038] The present invention (17) provides a buffer material for lithium-ion batteries, characterized in that the buffer material for lithium-ion batteries has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0039] The present invention (18) provides a sealing material between the solar cell panel and the support member of a solar cell module, characterized in that the sealing material between the solar cell panel and the support member of the solar cell module has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0040] The present invention (19) provides a sealing material for electronic devices, characterized in that the sealing material for electronic devices has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0041] The present invention (20) provides a sealing material for an electrolysis device, characterized in that the sealing material for the electrolysis device has an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0042] The present invention (21) provides a sealing material for an electrolysis device, characterized in that the sealing material for the electrolysis device is formed only by an adhesive layer formed by an adhesive composition of any one of (1) to (11).

[0043] Invention Effects According to the present invention, an adhesive composition is provided for forming an adhesive layer disposed on the surface of an elastic rubber material, which is the main material of the sealing material, and is capable of forming an adhesive layer with excellent adhesion at both high temperature (above 100°C, for example 120°C) and room temperature of around 25°C.

[0044] In addition, according to the present invention, an adhesive composition is provided for forming an adhesive layer in a sealing material formed solely by the adhesive composition, which is capable of forming an adhesive layer with excellent adhesion at both high temperatures (above 100°C, for example 120°C) and normal temperatures of around 25°C. Detailed Implementation

[0045] The adhesive composition of the first aspect of the present invention is characterized in that, The adhesive composition contains: (Co)polymer (A), which contains a polymer block of (a) methylstyrene monomer; An olefinic polymer (B) comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partially or fully hydride blocks, wherein the content of the block (c) is greater than 87% by mass and less than 100% by mass on a monomer basis; and Tackifier (C).

[0046] Furthermore, in this specification, "(co)polymerization" means "homogeneous polymerization or copolymerization".

[0047] Furthermore, as an adhesive composition according to the first aspect of the present invention, one example is an adhesive composition characterized by containing: (Co)polymer (A) having (a) a polymer block of methylstyrene monomer and (b) a (co)polymer block of one or more aliphatic monoolefins and / or one or more aliphatic conjugated dienes or a partial or complete hydride block thereof; One or more olefin polymers (B) comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partial or complete hydride blocks, wherein the content of the block (c) is greater than 87% by mass and less than 100% by mass based on monomers; and Tackifier (C).

[0048] The adhesive composition of the first aspect of the present invention contains at least a (co)polymer (A), an olefin polymer (B), and a tackifier (C).

[0049] The adhesive composition of the second aspect of the present invention is characterized in that, The adhesive composition contains: (Co)polymer (A), which contains a polymer block of (a) methylstyrene monomer; An olefinic polymer (B) comprising (c) a (co)polymer block or a partially or fully hydride block of one or more aliphatic monoolefins and / or one or more aliphatic polyenes; and Tackifier (C) The ratio of the peel strength value at 25°C to the peel strength value at 25°C, the peel strength value at 100°C, and the peel strength value at 120°C, relative to the peel strength value of the adhesive composition (R), is 2.5 or more. The adhesive composition (R) is composed of 100 parts by mass of a hydrogenated α-methylstyrene-butadiene block copolymer with an α-methylstyrene unit content of 29% by mass based on monomers, and 50 parts by mass of a terpene phenolic resin as an adhesive.

[0050] Furthermore, as a second aspect of the adhesive composition of the present invention, one example is an adhesive composition characterized by, The adhesive composition contains: (Co)polymer (A), having (a) a polymer block of a polymeric block of a methylstyrene monomer, and (b) a (co)polymer block of one or more aliphatic monoolefins and / or one or more aliphatic conjugated dienes or a portion or a fully hydride block thereof; One or more olefinic polymers (B), comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partial or complete hydride blocks; and Tackifier (C) The ratio of the peel strength value at 25°C to the peel strength value at 25°C, the peel strength value at 100°C, and the peel strength value at 120°C, relative to the peel strength value of the adhesive composition (R), is 2.5 or more. The adhesive composition (R) is composed of 100 parts by mass of a hydrogenated α-methylstyrene-butadiene block copolymer with an α-methylstyrene unit content of 29% by mass based on monomers, and 50 parts by mass of a terpene phenolic resin as an adhesive.

[0051] The adhesive composition of the second aspect of the present invention contains at least a (co)polymer (A), an olefin polymer (B), and a tackifier (C).

[0052] Regarding the commonalities between the adhesive composition of the first aspect of the present invention and the adhesive composition of the second aspect of the present invention, the adhesive composition of the first aspect of the present invention and the adhesive composition of the second aspect of the present invention will be collectively referred to as the adhesive composition of the present invention for description.

[0053] The adhesive composition of the present invention relates to a (co)polymer (A) having a polymer block of (a) methylstyrene monomer. That is, in the (co)polymer (A), there are one or more (a) block portions in the molecular chain of the (co)polymer. The (co)polymer (A) is composed of a polymer of one methylstyrene monomer; is composed of a copolymer of two or more methylstyrene monomers; or is composed of one or more (co)polymer blocks of methylstyrene and one or more (co)polymer blocks of monomers other than methylstyrene.

[0054] Furthermore, as a (co)polymer (A), examples include copolymers having (a) a polymer block of methylstyrene monomer and (b) a (co)polymer block of one or more aliphatic olefins and / or one or more aliphatic conjugated dienes, or a partial or complete hydrogenated block thereof. That is, as a (co)polymer (A), examples include copolymers having one or more (a) block portions and one or more (b) block portions in the molecular chain of the copolymer.

[0055] (a) is a polymer block of methylstyrene monomer, formed by polymerizing methylstyrene. That is, (a) is a polymer block of methylstyrene monomer formed by polymerizing methylstyrene as a monomer.

[0056] The methylstyrene monomer involved in the block of (a) can be exemplified by α-methylstyrene, β-methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, etc. As a monomer, α-methylstyrene is preferred from the perspective of increased adhesion at high temperatures. The block of (a) is a (co)polymer block of methylstyrene monomer selected from one or more of the following: α-methylstyrene monomer, β-methylstyrene monomer, 2-methylstyrene monomer, 3-methylstyrene monomer, 4-methylstyrene monomer, etc.

[0057] (b) The block is a (co)polymer block of (b1) one or more aliphatic monoolefins and / or one or more aliphatic conjugated dienes, or (b2) a polymer block formed by the polymerization of one or more aliphatic monoolefins and / or one or more aliphatic conjugated dienes, and is a block formed by hydrogenation of part or all of the double bonds after polymerization.

[0058] That is, (b1) is a portion formed by polymerization using one aliphatic monoolefin as a monomer, a portion formed by copolymerization using two or more aliphatic monoolefins as monomers, a portion formed by polymerization using one aliphatic conjugated diene as a monomer, a portion formed by copolymerization using two or more aliphatic conjugated dienes as monomers, or a portion formed by copolymerization using one or more aliphatic monoolefins and one or more aliphatic conjugated dienes as monomers.

[0059] In addition, (b2) is a portion formed by polymerization using an aliphatic conjugated diene as a monomer, a portion formed by copolymerization using two or more aliphatic conjugated dienes as monomers, or a portion formed by copolymerization using one or more aliphatic monoolefins and one or more aliphatic conjugated dienes as monomers, and is a portion formed by hydrogenation of part or all of the double bonds after polymerization.

[0060] The aliphatic monoolefin involved in the block of (b) is a straight-chain or branched aliphatic monoolefin with 2 or more carbon atoms, preferably 2 to 13. Examples of aliphatic monoolefins involved in the block of (b) include ethylene, propylene, 1-butene, 2-butene, isobutene, 1-pentene, 2-pentene, 2-methyl-1-butene, 2-methyl-2-butene, 3-methyl-1-butene, 1-hexene, 2-hexene, 3-hexene, 2-methyl-1-pentene, 2-methyl-2-pentene, 4-methyl-1-pentene, 4-methyl-2-pentene, n-heptene, isoheptene, n-octene, isooctene, n-nonene, isooctene, n-decene, isodecanene, n-undecene, isoundecene, 6,10-dimethyl-1-undecene, etc.

[0061] The aliphatic conjugated diene involved in the block (b) is a straight-chain or branched aliphatic conjugated diene with 4 or more carbon atoms, preferably 4 to 15. Examples of aliphatic conjugated dienes involved in the block (b) include 1,3-butadiene, 2-methyl-1,3-butadiene (isoprene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, 3-methyl-1,3-pentadiene, 1,3-hexadiene, 1,3-cyclohexadiene, 1,3-heptadiene, 1,3-octadiene, 2-methyl-1,3-octadiene, myrcene, (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene (common name: β-farnesene), etc.

[0062] As the block in (b), from the viewpoint of improving the adhesive strength at room temperature of around 25°C, it is preferred to be a copolymer block or a partial or complete hydrogenated block of two or more monomers selected from ethylene, propylene, 1-butene, butadiene, isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene.

[0063] As such a segment (b), it is preferred to be (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or full hydride blocks (iii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) butadiene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; ethylene, propylene and (conjugated) butadiene copolymer blocks or their partial or full hydrogenated blocks, Ethylene, propylene, copolymer blocks of (conjugated) butadiene and (conjugated) isoprene, or their partial or full hydrogenated blocks, (Conjugated)butadiene and (conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (Conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (vii) Copolymer blocks of ethylene, propylene and 6,10-dimethyl-1-undecene Ethylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, Propylene, copolymer blocks of (conjugated) isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated) copolymer blocks of isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydride blocks, copolymer blocks of ethylene, propylene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, Ethylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, Propylene, copolymer blocks of (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partially or fully hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, propylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Ethylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (Conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (viii) (Conjugated)butadiene polymer blocks, (ix) (Conjugated)isoprene polymer blocks.

[0064] As a segment of (b), it is further preferred to (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or full hydride blocks (iii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) butadiene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; ethylene, propylene and (conjugated) butadiene copolymer blocks or their partial or full hydrogenated blocks, Ethylene, propylene, copolymer blocks of (conjugated) butadiene and (conjugated) isoprene, or their partial or full hydrogenated blocks, (Conjugated)butadiene and (conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene with 6,10-dimethyl-1-undecene with (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (Conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (vii) Copolymer blocks of ethylene, propylene and 6,10-dimethyl-1-undecene Ethylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, Propylene, copolymer blocks of (conjugated) isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated) copolymer blocks of isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydride blocks, copolymer blocks of ethylene, propylene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, Ethylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, Propylene, copolymer blocks of (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partially or fully hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, propylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Ethylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, A copolymer block of (conjugated) isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene, or a partially or fully hydrogenated block thereof.

[0065] As a segment of (b), it is further preferred to (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or full hydride blocks (iii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) butadiene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; ethylene, propylene and (conjugated) butadiene copolymer blocks or their partial or full hydrogenated blocks, Ethylene, propylene, copolymer blocks of (conjugated) butadiene and (conjugated) isoprene, or their partial or full hydrogenated blocks, (Conjugated)butadiene and (conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, A copolymer block of (conjugated) butadiene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or a partially or fully hydrogenated block thereof.

[0066] As a segment of (b), it is particularly preferred (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks.

[0067] As copolymer (A), it is further preferred to be a triblock copolymer composed of a polymer block of (a) α-methylstyrene monomer - (b) a copolymer block of two or more monomers selected from ethylene, propylene, 1-butene, butadiene, isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene or a partially or fully hydride block of (a) α-methylstyrene monomer.

[0068] The content of methylstyrene units, preferably α-methylstyrene units, in the (co)polymer (A) is 10-40% by mass, preferably 15-40% by mass, and more preferably 20-35% by mass, based on monomers. By keeping the content of methylstyrene units, preferably α-methylstyrene units, in the (co)polymer (A) within the above range, it is possible to suppress the decrease in elastic modulus at high temperatures (above 100°C, for example 120°C) and increase the adhesive strength at high temperatures (above 100°C, for example 120°C).

[0069] When the (co)polymer (A) contains the block (b), the content of the block unit (b) is 60 to 90% by mass, preferably 60 to 85% by mass, more preferably 65 to 80% by mass, based on monomers. By keeping the content of the block unit (b) of the (co)polymer (A) within the above range, moderate flexibility can be maintained at room temperature to high temperature (above 100°C, for example 120°C), and the adhesive strength at room temperature to high temperature (above 100°C, for example 120°C) is increased.

[0070] The olefin polymer (B) involved in the adhesive composition of the present invention is one or more olefin polymers (B) comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partial or complete hydrogenated blocks, wherein the content of the block (c) is greater than 87% by mass and less than 100% by mass based on monomers. In the present invention, when the block (c) in the olefin polymer (B) is 100% by mass based on monomers, the polymer of the olefin polymer (B) consists only of one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymers or their partial or complete hydrogenated blocks. Furthermore, in this invention, when the block (c) in the olefin polymer (B) is greater than 87% by mass and less than 100% by mass based on monomers, the molecular chain of the olefin polymer (B) contains one or more (c) aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partial or complete hydride blocks, and one or more (c)polymer blocks other than the block (c).

[0071] (c) is a (co)polymer block of (c1) one or more aliphatic monoolefins and / or one or more aliphatic polyenes, or (c2) a polymer block formed by polymerizing one or more aliphatic monoolefins and / or one or more aliphatic polyenes, and is a block formed by hydrogenation of part or all of the double bonds after polymerization.

[0072] That is, (c1) is a portion formed by polymerization using one aliphatic monoolefin as a monomer, a portion formed by copolymerization using two or more aliphatic monoolefins as monomers, a portion formed by polymerization using one aliphatic polyene as a monomer, a portion formed by copolymerization using two or more aliphatic polyenes as monomers, or a portion formed by copolymerization using one or more aliphatic monoolefins and one or more aliphatic polyenes as monomers.

[0073] Additionally, (c2) is a portion formed by polymerization using one aliphatic polyene as a monomer, a portion formed by copolymerization using two or more aliphatic polyenes as monomers, or a portion formed by copolymerization using one or more aliphatic monoolefins and one or more aliphatic polyenes as monomers, and a portion formed by hydrogenation of part or all of the double bonds after polymerization.

[0074] The aliphatic monoolefin involved in the block (c) is a straight-chain or branched aliphatic monoolefin with 2 or more carbon atoms, preferably 2 to 13. Examples of aliphatic monoolefins involved in the block (c) include ethylene, propylene, 1-butene, 2-butene, isobutene, 1-pentene, 2-pentene, 2-methyl-1-butene, 2-methyl-2-butene, 3-methyl-1-butene, 1-hexene, 2-hexene, 3-hexene, 2-methyl-1-pentene, 2-methyl-2-pentene, 4-methyl-1-pentene, 4-methyl-2-pentene, n-heptene, isoheptene, n-octene, isooctene, n-nonene, isooctene, n-decene, isodecanene, n-undecene, isoundecene, 6,10-dimethyl-1-undecene, etc.

[0075] (c) refers to an aliphatic polyene that has two or more double bonds. Examples of aliphatic polyenes that are blocks in (c) include straight-chain or branched aliphatic conjugated dienes with 4 or more carbon atoms, preferably 4 to 15; straight-chain or branched aliphatic non-conjugated dienes with 4 or more carbon atoms, preferably 4 to 15; and aliphatic cyclic polyenes with 6 or more carbon atoms, preferably 6 to 18, more preferably 6 to 15. Examples of aliphatic conjugated dienes involved in the block (c) include 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, 3-methyl-1,3-pentadiene, 1,3-hexadiene, 1,3-cyclohexadiene, 1,3-heptadiene, 1,3-octadiene, 2-methyl-1,3-octadiene, myrcene, and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene. Examples of aliphatic non-conjugated dienes involved in the block (c) include 1,4-hexadiene. Examples of aliphatic cyclic polyenes involved in the block (c) include ethylidene norbornene, dicyclopentadiene, and vinyl norbornene.

[0076] As the block in (c), from the viewpoint of improving the adhesive strength at room temperature of around 25°C, copolymer blocks or partial or complete hydrogenated blocks of two or more monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene, (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene, ethylidene norbornene, dichloropentadiene, and vinyl norbornene are particularly preferred.

[0077] As such a segment (c), it is preferred (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or full hydride blocks (iii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) butadiene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; ethylene, propylene and (conjugated) butadiene copolymer blocks or their partial or full hydrogenated blocks, Ethylene, propylene, copolymer blocks of (conjugated) butadiene and (conjugated) isoprene, or their partial or full hydrogenated blocks, (Conjugated)butadiene and (conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (Conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (vii) Copolymer blocks of ethylene, propylene and 6,10-dimethyl-1-undecene Ethylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, Propylene, copolymer blocks of (conjugated) isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated) copolymer blocks of isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydride blocks, copolymer blocks of ethylene, propylene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, Ethylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, Propylene, copolymer blocks of (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partially or fully hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, propylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Ethylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (Conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (viii) (Conjugated)butadiene polymer blocks, (ix) (Conjugated)isoprene polymer blocks.

[0078] (x) copolymer blocks of ethylene, propylene and ethylene norbornene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, butene and ethylidene norbornene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and vinyl norbornene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, butene and vinyl norbornene, or their partial or full hydrogenated blocks, ethylene, propylene and dichloropentadiene copolymer blocks or their partial or full hydrogenated blocks, A copolymer block of ethylene, propylene and 1,4-hexadiene, or a partially or fully hydrogenated block thereof.

[0079] (c) is further preferably a segment. (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or full hydride blocks (iii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) butadiene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; ethylene, propylene and (conjugated) butadiene copolymer blocks or their partial or full hydrogenated blocks, Ethylene, propylene, copolymer blocks of (conjugated) butadiene and (conjugated) isoprene, or their partial or full hydrogenated blocks, (Conjugated)butadiene and (conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (Conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (vii) Copolymer blocks of ethylene, propylene and 6,10-dimethyl-1-undecene Ethylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, Propylene, copolymer blocks of (conjugated) isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated) copolymer blocks of isoprene and 6,10-dimethyl-1-undecene, or their partial or full hydride blocks, copolymer blocks of ethylene, propylene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, A copolymer block of ethylene, (conjugated) isoprene, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or a partially or fully hydride block thereof, Copolymer blocks of propylene, (conjugated) isoprene, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or partially or fully hydrogenated blocks thereof, ethylene, propylene, (conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated) isoprene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, propylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Ethylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, Propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydrogenated blocks, ethylene, propylene, (conjugated) isoprene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, A copolymer block of (conjugated) isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene, or a partially or fully hydrogenated block thereof.

[0080] As a segment of (c), it is further preferred to (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or full hydride blocks (iii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) butadiene, or their partial or full hydrogenated blocks, copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; ethylene, propylene and (conjugated) butadiene copolymer blocks or their partial or full hydrogenated blocks, Ethylene, propylene, copolymer blocks of (conjugated) butadiene and (conjugated) isoprene, or their partial or full hydrogenated blocks, (Conjugated)butadiene and (conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, A copolymer block of (conjugated) butadiene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or a partially or fully hydrogenated block thereof.

[0081] As a segment of (c), it is particularly preferred (i) ethylene-1-butene copolymer block, Ethylene-(conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, 1-Butene and (conjugated)butadiene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (conjugated)butadiene copolymer blocks or their partial or full hydrogenated blocks, (Conjugated)butadiene polymer blocks or their partial or complete hydride blocks, (ii) ethylene-propylene copolymer block copolymers, Ethylene-(conjugated)isoprene copolymer blocks or their partial or full hydrogenated blocks, copolymer blocks of propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; copolymer blocks of ethylene, propylene and (conjugated) isoprene, or their partial or full hydrogenated blocks; (Conjugated) isoprene polymer blocks or their partial or complete hydride blocks, (iv) Polymer blocks of isobutylene (v) Ethylene-6,10-dimethyl-1-undecene copolymer block, ethylene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene polymeric blocks or their partial or complete hydride blocks (vi) A copolymer block of ethylene, 1-butene and 6,10-dimethyl-1-undecene Ethylene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and 6,10-dimethyl-1-undecene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Ethylene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, (Conjugated)butadiene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene copolymer blocks or their partial or full hydride blocks, Copolymer blocks of ethylene, 1-butene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks; ethylene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, 1-Butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, ethylene, 1-butene, (conjugated)butadiene, copolymer blocks of 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or their partial or full hydride blocks, A copolymer block of (conjugated) butadiene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodec-1,6,10-triene, or a partially or fully hydrogenated block thereof.

[0082] In the olefin polymer (B), the content of (c) a polymer block of one or more aliphatic monoolefins and / or one or more aliphatic polyenes, or a partial or complete hydrogenated block thereof, is greater than 87% by mass and less than 100% by mass, more preferably 90 to 100% by mass, more preferably greater than 95% by mass and less than 100% by mass, more preferably 96 to 100% by mass, and more preferably 100% by mass, based on monomers. By making the content of the block (c) in the olefin polymer (B) within the above range, the adhesive strength at room temperature (around 25°C) is increased, and the adhesive strength at high temperature (above 100°C, for example 120°C) is also increased. That is, it is possible to simultaneously achieve both room temperature flexibility and suppression of softening at high temperature, and to have high sealing performance (adhesive strength) at both room temperature and high temperature.

[0083] In olefin polymers (B), if less than 13% by mass based on monomers, there may be (co)polymer blocks other than those in (c).

[0084] Other than the (co)polymer blocks involved in (c) of such olefin polymers (B), examples include (d) polymer blocks of styrene or monomers having a styrene structure.

[0085] (d) is a polymer block of styrene or a monomer having a styrene structure, formed by polymerizing styrene (CH2=CH-C6H5) or a monomer having a styrene structure.

[0086] The styrene or monomers having a styrene structure involved in the block of (d) can be exemplified by, for example, styrene, α-methylstyrene, β-methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-propylstyrene, 4-isopropylstyrene, 4-n-butylstyrene, 4-tert-butylstyrene, 4-n-hexylstyrene, 4-cyclohexylstyrene, 4-octylstyrene, 4-dodecylstyrene, 2,4-dimethylstyrene, 2,4-diisopropylstyrene, 2,4,6-trimethylstyrene, 1-vinylnaphthalene, 2-vinylnaphthalene, vinylanthracene, N,N-diethyl-4-aminoethylstyrene, vinylpyridine, 4-methoxystyrene, 4-vinylstyrene, 1,1-diphenylethylene, etc.

[0087] As a block of (d), examples include polymer blocks of styrene, styrene, α-methylstyrene, β-methylstyrene, 2-methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-propylstyrene, 4-isopropylstyrene, 4-n-butylstyrene, 4-tert-butylstyrene, 4-n-hexylstyrene, 4-cyclohexylstyrene, 4-octylstyrene, 4-dodecylstyrene, 2,4-dimethylstyrene, 2,4-diisopropylstyrene, 2,4,6-trimethylstyrene, 1-vinylnaphthalene, 2-vinylnaphthalene, vinylanthracene, N,N-diethyl-4-aminoethylstyrene, vinylpyridine, 4-methoxystyrene, 4-vinylstyrene, and copolymer blocks of one or more monomers selected from 1,1-diphenylethylene.

[0088] Furthermore, when the block in (d) contains less than 13% by mass of methylstyrene as a monomer block based on monomer content, the (co)polymer (A) and the olefin polymer (B) form a copolymer. When the block in (d) does not contain less than 13% by mass of methylstyrene as a monomer block based on monomer content, the (co)polymer (A) and the olefin polymer (B) form different copolymers.

[0089] As an olefinic polymer (B), examples include triblock copolymers composed of (d) polymer blocks of styrene or monomers having a styrene structure; (c) copolymer blocks of monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene, and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene, or partially or fully hydride blocks thereof; and (d) polymer blocks of styrene or monomers having a styrene structure. Any of the polymers and diblock copolymers, more preferably diblock copolymers, may also include triblock copolymers in diblock copolymers composed of polymer blocks of (d) styrene or monomers having a styrene structure and copolymer blocks of (c) copolymer blocks of one or more monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene or partially or fully hydrogenated blocks thereof.

[0090] In the olefin polymer (B), the content of the (d) block, based on monomers, is less than 13% by mass, preferably less than 10% by mass, more preferably less than 5% by mass, more preferably less than 4% by mass, and more preferably 0% by mass. By making the content of the (d) block in the olefin polymer (B) within the above range, the adhesive strength at room temperature (around 25°C) is increased, and the adhesive strength at high temperatures (above 100°C, for example, 120°C) is also increased. That is, it is possible to simultaneously achieve both room temperature flexibility and suppression of softening at high temperatures, and to achieve high sealing performance (adhesive strength) at both room temperature and high temperatures.

[0091] The olefin polymer (B) is preferably a copolymer of one or more α-olefins selected from ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, and 1-decene, or a copolymer of one or more α-olefins selected from ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, and 1-decene with an aliphatic polyene selected from ethylene norbornene, dicyclopentadiene, hexadiene, vinyl norbornene, butadiene, and isoprene.

[0092] The olefin polymer (B) is preferably a diene rubber selected from butyl rubber, natural rubber, isoprene rubber, butadiene rubber and styrene-butadiene rubber, or a partially or fully hydrogenated diene rubber thereof.

[0093] The tackifier (C) in the adhesive composition of the present invention improves the adhesion of the adhesive layer. Examples of tackifiers include phenolic resins, terpene resins, rosin resins, hydrogenated rosin resins, coumarone resins, terpene phenol resins, hydrogenated terpene phenol resins, aromatic hydrocarbon resins, aliphatic hydrocarbon resins, and xylene-formaldehyde resins. More specifically, tackifier (C) can be terpene resins, terpene phenolic resins, hydrogenated terpene resins, hydrogenated terpene phenolic resins, aromatic hydrocarbon resins, aliphatic hydrocarbon resins, and xylene-formaldehyde resins. Tackifier (C) is preferably selected from one or more of terpene phenolic resins, hydrogenated terpene phenolic resins, phenolic resins, xylene-formaldehyde resins, rosin resins, and hydrogenated rosin resins.

[0094] The softening point of the tackifier (C) is preferably 80~180℃, more preferably 100~170℃. In addition, the hydroxyl value of the tackifier (C) is preferably 5~200mgKOH / g, more preferably 10~120mgKOH / g.

[0095] In the adhesive composition of the present invention, the ratio of the content of (co)polymer (A) to the total content of (co)polymer (A) and olefin polymer (B) ((co)polymer (A) / (co)polymer (A) + olefin polymer (B))) × 100) is 5 to 95% by mass, preferably 10 to 95% by mass, more preferably 25 to 95% by mass, and even more preferably 40 to 95% by mass. By keeping the ratio of the content of (co)polymer (A) to the total content of (co)polymer (A) and olefin polymer (B) within the above range, it is possible to achieve both high adhesion at high temperatures (above 100°C, for example 120°C) and high adhesion at room temperature (around 25°C).

[0096] In the adhesive composition of the present invention, the content of tackifier (C) relative to the total content of (co)polymer (A) and olefin polymer (B) ((tackifier (C) / ((co)polymer (A) + olefin polymer (B)))×100) is 5 to 150% by mass, preferably 10 to 120% by mass, and more preferably 30 to 90% by mass. By keeping the content of tackifier (C) relative to the total content of copolymer (A) and olefin polymer (B) within the above range, it is possible to achieve both high adhesion at high temperatures (above 100°C, for example 120°C) and high adhesion at room temperature (around 25°C).

[0097] In addition to the (co)polymer (A), olefin polymer (B), and tackifier (C), the adhesive composition of the present invention may also contain an antioxidant (D). Examples of antioxidants (D) include amine-based, phenol-based, benzimidazole-based, phosphoric acid-based, and organothioic acid-based antioxidants.

[0098] When the adhesive composition of the present invention contains an antioxidant (D), the ratio of the antioxidant (D) content to the total content of the (co)polymer (A) and the olefin polymer (B) ((antioxidant (D) / ((co)polymer (A) + olefin polymer (B)))×100) is 0.10 to 1.0% by mass, preferably 0.15 to 0.75% by mass, more preferably 0.25 to 0.50% by mass. By keeping the ratio of the antioxidant (D) content to the total content of the (co)polymer (A) and the olefin polymer (B) within the above range, it is possible to suppress the reduction in adhesive strength caused by heat or light-induced degradation.

[0099] In addition, the adhesive composition of the present invention may contain, as needed, various additives used in the adhesive composition, in addition to the (co)polymer (A), olefin polymer (B) and tackifier (C), without impairing the effects of the present invention.

[0100] The adhesive composition of the present invention may contain a leveling agent (surfactant) (E) as an additive. Examples of leveling agents (surfactants) (E) include polyester-modified silicone, polyether-modified silicone, polyether-polyester-modified silicone, silicone-modified (meth)acrylic resin, methanol-modified silicone, amino-modified silicone, polydimethylsiloxane modified with carboxyl, ether, epoxy, etc., alkyl-modified silicone, alkyl-aralkyl-modified silicone, higher fatty acid ester-modified silicone, phenyl-modified silicone, carboxyl-modified silicone, epoxy-modified silicone, fluorinated silicone, and other silicone-based leveling agents; linear silicones such as polydimethylsiloxane, polyphenylsiloxane, polymethylphenylsiloxane, and polymethylhydrosiloxane; acrylic polymers, silicones... Acrylic polymers such as modified acrylic polymers, fluorinated acrylic polymers, (meth)acrylic acid copolymers, and polyether-modified (meth)acrylic acid compounds; fluorinated leveling agents such as perfluoroalkenyl carboxylates, perfluoroalkenyl sulfonates, perfluoroalkenyl phosphates, perfluoroalkyl polyoxyethylene ethers, perfluoroalkyl carboxylates, perfluoroalkyl sulfonates, and perfluoroalkyl phosphates; vinyl polymers such as vinyl ether polymers; alkynyl glycol leveling agents; and olefin polymers such as low molecular weight polyethylene and low molecular weight polypropylene, ethylene-(meth)acrylic acid copolymers, and acid-modified polyolefins. Additionally, leveling agents (surfactants) can also include nonionic surfactants, anionic surfactants, cationic surfactants, amphoteric surfactants, fluorinated surfactants, alkoxylated surfactants, hyperbranched polyethers, sulfosuccinates, tetramethyldecanediols, and alkoxy-modified tetramethyldecanediol.

[0101] The adhesive composition of the present invention is obtained as follows: (co)polymer (A), olefin polymer (B), tackifier (C), and antioxidant (D), leveling agent (E), etc., as needed, are mixed in a solvent, and then mixed, stirred or kneaded using a mixer. After that, the adhesive layer is applied to the object to which it is formed, and the solvent is removed by heating.

[0102] There are no particular limitations on the solvent used; examples include aliphatic hydrocarbon solvents, aromatic hydrocarbon solvents, ketone solvents, ester solvents, ether solvents, and alcohol solvents, with aromatic hydrocarbon solvents being preferred. Furthermore, the amount of solvent used can be appropriately selected based on the application, coating method, and coating thickness.

[0103] In the adhesive composition of the second aspect of the present invention, the ratio of the peel strength value at 25°C to the peel strength value at 25°C, the peel strength value at 100°C, and the peel strength value at 120°C are all 2.50 or more, preferably 2.75 or more, relative to the peel strength value of the adhesive composition (R). The adhesive composition (R) consists of 100 parts by mass of a hydrogenated α-methylstyrene-butadiene block copolymer containing 29% by mass of α-methylstyrene units on a monomer basis, and 50 parts by mass of a terpene phenolic resin as an adhesive.

[0104] That is, when the peel strength value of the adhesive composition (R) at 25°C is set to 1.00, the relative ratios of the peel strength values ​​at 25°C, 100°C, and 120°C of the adhesive composition of the second aspect of the present invention are all 2.50 or more, preferably 2.75 or more. The adhesive composition (R) is composed of 100 parts by mass of a hydrogenated α-methylstyrene-butadiene block copolymer with an α-methylstyrene unit content of 29% by mass based on monomers, and 50 parts by mass of a terpene phenolic resin as an adhesive.

[0105] More specifically, as described below. First, the peel strength of the adhesive composition (R) is measured at 25°C to obtain the peel strength value of the adhesive composition (R) at 25°C. Next, the peel strength of the adhesive composition of the second aspect of the present invention is measured at 25°C, 100°C, and 120°C to obtain the peel strength values ​​of the adhesive composition of the second aspect of the present invention at 25°C, 100°C, and 120°C. Then, the ratio of the peel strength value of the adhesive composition of the second aspect of the present invention at 25°C, 100°C, and 120°C to the peel strength value of the adhesive composition (R) at 25°C is calculated. For example, when the peel strength value of the adhesive composition (R) at 25°C is X [N / mm], and the peel strength values ​​of the adhesive composition of the second aspect of the present invention at 25°C, 100°C, and 120°C are Y1 [N / mm], Y2 [N / mm], and Y3 [N / mm] respectively, in the adhesive composition of the second aspect of the present invention, the value of any one of Y1 / X, Y2 / X, and Y3 / X is 2.50 or more, preferably 2.75 or more.

[0106] Furthermore, the peel strength mentioned above refers to the peel strength obtained through the operating steps in the Example section of the test.

[0107] The copolymer (A) has a high elastic modulus at high temperatures (above 100°C, for example, 120°C), and when combined with the tackifier (C), it exhibits excellent adhesion at high temperatures. The olefin polymer (B) has soft properties at room temperature (around 25°C), and when combined with the tackifier (C), it exhibits excellent adhesion at room temperature (around 25°C). Therefore, the adhesive composition of the present invention, by containing (A), (B), and (C), becomes an adhesive composition with excellent adhesion over a wide temperature range.

[0108] Styrene-based block copolymers, represented by poly(styrene-butadiene-styrene), are known as thermoplastic elastomers. The polystyrene blocks are called hard segments, which are in a glassy state at room temperature, while the polybutadiene blocks are called soft segments, which are in a rubbery state at room temperature. The hard segments of styrene-based thermoplastic elastomers function as crosslinking points, exhibiting rubber elasticity at room temperature. However, since the glass transition temperature of polystyrene is around 100°C, it loses its rubber elasticity and its elastic modulus decreases at temperatures above 100°C. On the other hand, the poly(α-methylstyrene) contained in (co)polymer (A) has a higher glass transition temperature than polystyrene, and the elastic modulus of (co)polymer (A) is less likely to decrease at temperatures above 100°C. Therefore, the adhesive composition of the present invention, by using (co)polymer (A), becomes an adhesive composition with excellent adhesion at high temperatures (above 100°C, for example, 120°C).

[0109] On the other hand, if (co)polymer (A) is used instead of (B), the elastic modulus at room temperature of around 25°C becomes higher and the adhesion decreases.

[0110] Therefore, in the adhesive composition of the present invention, the ratio of the content of (co)polymer (A) to the total content of (co)polymer (A) and olefin polymer (B) ((co)polymer (A) / (co)polymer (A) + olefin polymer (B))) × 100) is 5 to 95% by mass, preferably 10 to 95% by mass, more preferably 25 to 95% by mass, and even more preferably 40 to 95% by mass, thereby maintaining flexibility even at room temperature of around 25°C. Thus, the adhesive composition of the present invention, by using olefin polymer (B), becomes an adhesive composition with excellent adhesion at room temperature of around 25°C. However, if olefin polymer (B) is not used in combination with (A), the adhesion almost disappears at temperatures above 100°C.

[0111] As described above, in this invention, by combining a (co)polymer (A) with excellent adhesion at high temperatures, a (B) with excellent adhesion at low temperatures, and a tackifier (C), it is possible to provide an adhesive composition with excellent adhesion over a wide temperature range.

[0112] The adhesive composition of the present invention is an aromatic copolymer selected from polyphenylene ether copolymer, styrene-maleic anhydride copolymer, styrene-N-phenylmaleimide copolymer, and styrene-N-phenylmaleimide copolymer-maleic anhydride copolymer, and may contain one or more copolymers (F) with a glass transition temperature of 140°C or higher.

[0113] In the adhesive composition of the present invention, the content of copolymer (F) is 0 to 50% by mass relative to (co)polymer (A), preferably 0 to 30% by mass, more preferably 0 to 20% by mass.

[0114] The adhesive composition of the present invention is used to improve adhesion to sealing objects such as elastic rubber materials, resin materials, metal materials, paper materials, or cork materials, which are the main materials used in gaskets, sealing materials, etc. Therefore, the adhesive composition of the present invention is formed on the surface of elastic rubber materials, resin materials, metal materials, paper materials, or cork materials, which are the main materials used in gaskets, sealing materials, etc.

[0115] Examples of uses for the adhesive composition of the present invention include adhesive layers formed on sheet gaskets, flooring materials, sealing materials inside vehicle doors, cushioning materials for fuel tanks, sealing materials for electronic components, cushioning materials for lithium-ion batteries, sealing materials between solar cell panels and support members of solar cell modules, sealing materials for electronic devices, and sealing materials for electrolytic devices.

[0116] The sheet gasket of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of sheet gaskets of the present invention include sheet-shaped elastic rubber material, resin material, metal material, paper material, or cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, metal material, paper material, or cork material. The sheet-shaped elastic rubber material or resin material may or may not have a metal sheet or resin sheet inside. Furthermore, a primer layer for further improving adhesive strength may be provided on the elastic rubber material, resin material, metal material, paper material, or cork material used in the sheet gasket of the present invention.

[0117] The flooring material of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of flooring materials of the present invention include flooring materials having an elastic rubber material, a resin material, a paper material, or a cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0118] The sealing material for the interior of a vehicle door of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of sealing materials for the interior of a vehicle door according to the present invention include those having an elastic rubber material, a resin material, a paper material, or a cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0119] The cushioning material of the fuel tank of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of cushioning materials for the fuel tank of the present invention include a fuel tank cushioning material having an elastic rubber material, a resin material, a paper material, or a cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0120] The sealing material for the electronic component of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of sealing materials for the electronic component of the present invention include sealing materials for electronic components having an elastic rubber material, resin material, paper material, or cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0121] The buffer material for lithium-ion batteries of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of the buffer material for lithium-ion batteries of the present invention include a buffer material for lithium-ion batteries having an elastic rubber material, a resin material, a paper material, or a cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0122] The sealing material between the solar cell panel and the support member of the solar cell module of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of sealing materials between the solar cell panel and the support member of the solar cell module of the present invention include those having an elastic rubber material, resin material, paper material, or cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0123] The sealing material for electronic devices of the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of sealing materials for electronic devices according to the present invention include those having an elastic rubber material, a resin material, a paper material, or a cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0124] The sealing material for an electrolysis device according to the present invention is characterized by having an adhesive layer formed by the adhesive composition of the present invention. Examples of sealing materials for an electrolysis device according to the present invention include those having an elastic rubber material, a resin material, a paper material, or a cork material, and an adhesive layer formed by the adhesive composition of the present invention on the surface of the elastic rubber material, resin material, paper material, or cork material.

[0125] In this invention, elastic rubber materials can be categorized as solid rubber materials and foamed rubber materials.

[0126] Examples of solid rubber materials include natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), butyl rubber (IIR), ethylene propylene rubber (EPM), ethylene propylene diene rubber (EPDM), ethylene butene diene rubber (EBDM), acrylonitrile butadiene rubber (NBR), styrene butadiene rubber (SBR), chloroprene rubber, polyurethane rubber, acrylic rubber, silicone rubber, fluororubber, or their hydrogenated forms. Additionally, olefin-based, styrene-based, polyurethane-based, ester-based, and amide-based thermoplastic elastomers can also be used, or a mixture of the above-mentioned rubbers and thermoplastic elastomers can be used.

[0127] Foamed rubber is a porous rubber. Examples of foamed rubber include sponge-like foamed rubber with a continuous bubble structure, foamed rubber with an independent bubble structure, and semi-independent foamed rubber. Specifically, materials used for foamed rubber include, for example, natural rubber (NR), butadiene rubber (BR), isoprene rubber (IR), butyl rubber (IIR), ethylene propylene rubber (EPM), ethylene propylene diene rubber (EPDM), ethylene butene diene rubber (EBDM), acrylonitrile butadiene rubber (NBR), styrene butadiene rubber (SBR), chloroprene rubber, polyurethane rubber, acrylic rubber, silicone rubber, fluororubber, or their hydrogenated forms. Additionally, olefin-based, styrene-based, polyurethane-based, ester-based, and amide-based thermoplastic elastomers can also be used, or a mixture of the above-mentioned rubbers and thermoplastic elastomers can be used.

[0128] In this invention, the following resin materials are appropriately selected as the resin material according to the intended use of the sealing material: general-purpose resins such as polyethylene, polypropylene, polystyrene, acrylonitrile / butadiene / styrene resin (ABS resin), polyvinyl chloride resin, acrylonitrile / styrene resin, methacrylic acid resin, and vinyl chloride resin; general-purpose engineering resins such as polyamide, polyacetal, polycarbonate, modified polyphenylene ether, polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; thermoplastic resins such as polyphenylene sulfide, polyimide, polyetherimide, polyarylate, polysulfone, polyetheretherketone, and liquid crystal polymers; thermosetting resins such as phenolic resin, urea resin, melamine resin, unsaturated polyester resin, and epoxy resin.

[0129] In the sealing materials of the present invention, the sealing materials formed solely by the adhesive layer formed by the adhesive composition of the present invention can be exemplified as sealing materials formed solely by the adhesive layer formed by the adhesive composition of the present invention without using substrates such as elastic rubber materials, resin materials, metal materials, paper materials or cork materials.

[0130] The present invention will now be described in more detail through examples and comparative examples, but the present invention is not limited to any of the examples below.

[0131] Example (Examples and comparative examples) <Preparation of Adhesive Solution> Measure 280g of copolymer A and 520g of solvent from Tables 1 and 2 into a 1L container, and stir using a Three-One motor at 250-300 rpm for at least 4 hours to prepare a 35% solution (solution A). Similarly, prepare a 35% solution (solution B) for copolymers B (B1-B5) from Table 1. Measure 140g of tackifier C (C1, C2) and 260g of solvent from Table 1 into a polypropylene container with a lid, mix and dissolve by shaking to prepare a 35% solution (solution C).

[0132] Mix solutions A, B, and C according to the mixing ratios and concentrations shown in Table 1, and stir at 500 rpm for 1 to 5 minutes using a Three-One motor to prepare an adhesive solution. Furthermore, add appropriate amounts of solvent to adjust the concentration so that the adhesive solution reaches a concentration in the range of 30% to 35%.

[0133] <Making of Adhesive Film> The resin film is cut into a length of 400 mm and a width of 150 mm. At this time, the length direction is set as up and down, and the width direction is set as left and right. The resin film is fixed to the coating table, and the adhesive solution is coated using a coater. The coated film is placed in a high-temperature constant-temperature machine to fully dry the solvent, and the coating and drying are also carried out on the back of the resin film in the same process to produce a double-sided adhesive film. The thickness of the adhesive at a portion 50 mm from the left and right ends of the film is measured with a micrometer as the adhesion thickness. In addition, the material of the resin film is selected from polyethylene terephthalate, polyethylene naphthalate, polyvinyl chloride, polystyrene, syndiotactic polystyrene, and polyimide, and surface treatment can be carried out as required.

[0134] <Cutting of the adhesive film for peel test> Cutting is performed at positions 20 mm from the left and right ends and 40 mm from the upper and lower ends of the adhesive film to produce a film with a length of 320 mm and a width of 110 mm. This film is cut into a length of 35 mm and a width of 15 mm as the adhesive film for peel test.

[0135] <Pressing of the adhesive film for peel test> The adhesive film for peel test is pressed against the adherend (stainless steel plate). The adherend cut into a length of 70 mm and a width of 15 mm is cleaned with ethanol. Then, the lower ends of the adherend and the adhesive film for peel test are aligned, and the adherends are respectively bonded to both sides of the adhesive film in a manner that no air enters. Using an air press, a pressing treatment (10 kgf / cm ×15 s: 70 °C) is performed to obtain a sample for peel test.

[0136] <T-peel test> The T-peel test for measuring the adhesive force uses a universal testing machine (manufactured by Shimadzu Corporation, Autograph AGS-500NX). A chucked fixture for tensile test is installed on the testing machine, and the distance between the chucks is set to 50 mm. The adherend is bent into a T shape and fixed with the chuck hand, and the crosshead is raised at a speed of 50 mm / min to peel the adhesive film into a T shape. The test is carried out at test temperatures of 25 °C, 100 °C, and 120 °C. When the test is carried out at a test temperature above 100 °C, the peel test is carried out while heating in a constant-temperature bath.

[0137] The value obtained by dividing the test force [N] in the peel test by the width of 15 mm is measured as the peel strength [N / mm]. For each measurement result, the relative value is calculated when the peel strength at 25 °C in Comparative Example 2 is set to "1.00". The results are shown in Table 1 and Table 2.

[0138]

[0139]

[0140] A1: Hydrogenated form of α-methylstyrene-butadiene block copolymer, α-methylstyrene unit content (monomer basis): 29% by mass B1: Ethylene-propylene-diene copolymer (EPDM), (d) block content: 0% by mass B2: Ethylene-butene-diene copolymer (EBDM), (d) block content: 0% by mass B3: Ethylene-propylene copolymer, (d) block content: 0% by mass β1: Hydrogenated styrene-isobutylene block copolymer, (d) Block content: 15% by mass based on styrene monomer. β2: Hydrogenated styrene-butadiene block copolymer, (d) Block content: 20% by mass based on styrene monomer. β3: Hydrogenated styrene-isoprene block copolymer, (d) Block content: 13% by mass based on styrene monomer. C1: Terpene phenolic resin C2: Terpene phenolic resin C3: Hydrogenated terpene phenolic resin In Examples 1 to 9, at all temperatures of 25°C, 100°C, and 120°C, the relative value of the peel strength when the peel strength at 25°C of Comparative Example 2 was set to "1.00" was 2.50 or higher.

[0141] On the other hand, in Comparative Examples 1, 2, 5, 7, and 10, the relative value of the peel strength at 25°C when the peel strength at 25°C of Comparative Example 2 was set to "1.00" was less than 2.50. In Comparative Examples 3 and 4, the relative value of the peel strength at 100°C when the peel strength at 25°C of Comparative Example 2 was set to "1.00" was less than 2.50. In Comparative Examples 3, 4, 5, 6, 8, 9, 11, 12, and 13, the relative value of the peel strength at 120°C when the peel strength at 25°C of Comparative Example 2 was set to "1.00" was less than 2.50.

[0142] Based on the above results, it can be inferred that the adhesive layer formed by the adhesive composition of the present invention has high adhesion and excellent adhesion not only at room temperature of around 25°C but also at high temperatures (above 100°C, for example 120°C). Therefore, the sealing material formed by the adhesive layer of the adhesive composition of the present invention, which forms a sealing substrate such as resin material, metal material, paper material or cork material, has excellent sealing performance not only at room temperature of around 25°C but also at high temperatures (above 100°C, for example 120°C).

[0143] Furthermore, based on the above results, it can be inferred that the adhesive layer formed by the adhesive composition of the present invention has high adhesion and excellent adhesion not only at room temperature of around 25°C but also at high temperatures (above 100°C, for example 120°C). Therefore, the sealing material that uses only the adhesive layer formed by the adhesive composition as a sealing material without using sealing substrates such as resin materials, metal materials, paper materials or cork materials also has excellent sealing performance not only at room temperature of around 25°C but also at high temperatures (above 100°C, for example 120°C).

Claims

1. An adhesive composition, characterized in that, The adhesive composition contains: (Co)polymer (A), which contains a polymer block of (a) methylstyrene monomer; An olefinic polymer (B) comprising (c) one or more aliphatic monoolefins and / or one or more aliphatic polyenes (co)polymer blocks or their partially or fully hydride blocks, wherein the content of the block (c) is greater than 87% by mass and less than 100% by mass on a monomer basis; and Tackifier (C).

2. The adhesive composition according to claim 1, characterized in that, The (co)polymer (A) is a copolymer of (co)polymer blocks or partially or fully hydrogenated blocks containing (b) one or more aliphatic monoolefins and / or one or more aliphatic conjugated dienes.

3. The adhesive composition according to claim 1 or 2, characterized in that, The ratio of the content of the (co)polymer (A) to the total content of the (co)polymer (A) and the olefin polymer (B) ((co)polymer (A) / (co)polymer (A) + olefin polymer (B)))×100) is 5 to 95 by mass.

4. The adhesive composition according to claim 1 or 2, characterized in that, The olefin polymer (B) is a (co)polymer of one or more α-olefins selected from ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, and 1-decene, or a polymer of one or more α-olefins selected from ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-octene, and 1-decene and one or more aliphatic polyenes selected from ethylene norbornene, dicyclopentadiene, hexadiene, vinyl norbornene, butadiene, and isoprene.

5. The adhesive composition according to claim 1 or 2, characterized in that, The olefin polymer (B) is a diene rubber selected from butyl rubber, natural rubber, isoprene rubber, butadiene rubber and styrene-butadiene rubber, or a partially or fully hydrogenated diene rubber thereof.

6. The adhesive composition according to claim 1 or 2, characterized in that, The tackifier (C) is selected from one or more of terpene phenolic resins, hydrogenated terpene phenolic resins, phenolic resins, xylene resins, and rosin-based resins.

7. The adhesive composition according to claim 1 or 2, characterized in that, The copolymer (F) contains one or more copolymers, wherein the copolymer (F) is an aromatic copolymer selected from polyphenylene ether copolymer, styrene-maleic anhydride copolymer, styrene-N-phenylmaleimide copolymer, and styrene-N-phenylmaleimide copolymer-maleic anhydride copolymer, and has a glass transition temperature of 140°C or higher.

8. The adhesive composition according to claim 1 or 2, characterized in that, The content of methylstyrene units in the (co)polymer (A) is 10 to 40% by mass on a monomer basis.

9. The adhesive composition according to claim 1 or 2, characterized in that, The (b) is a copolymer block or a partial or complete hydrogenated block thereof of one or more monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene.

10. The adhesive composition according to claim 1 or 2, characterized in that, The (co)polymer (A) is a triblock copolymer composed of polymer blocks of (a) methylstyrene monomer, copolymer blocks of (b) monomers selected from one or more monomers selected from ethylene, propylene, 1-butene, isobutene, butadiene, isoprene, 6,10-dimethyl-1-undecene, and (6E)-7,11-dimethyl-3-methylenedodecane-1,6,10-triene, or partially or fully hydrogenated blocks of (a) methylstyrene monomer.

11. An adhesive composition, characterized in that, The adhesive composition contains: (Co)polymer (A), which contains a polymer block of (a) methylstyrene monomer; An olefinic polymer (B) comprising (c) a (co)polymer block or a partially or fully hydride block of one or more aliphatic monoolefins and / or one or more aliphatic polyenes; and Tackifier (C) The ratio of the peel strength value at 25°C to the peel strength value at 25°C, the peel strength value at 100°C, and the peel strength value at 120°C, relative to the peel strength value of the adhesive composition (R), is 2.50 or more. The adhesive composition (R) consists of 100 parts by mass of a hydrogenated α-methylstyrene-butadiene block copolymer with an α-methylstyrene unit content of 29% by mass based on monomers, and 50 parts by mass of a terpene phenolic resin as an adhesive.

12. A sheet-like gasket, characterized in that, The sheet gasket has an adhesive layer formed from the adhesive composition of claim 1 or 11.

13. A flooring material, characterized in that, The flooring material has an adhesive layer formed by the adhesive composition of claim 1 or 11.

14. A sealing material for the interior of a motor vehicle door, characterized in that, The sealing material inside the vehicle door has an adhesive layer formed by the adhesive composition of claim 1 or 11.

15. A cushioning material for a fuel tank, characterized in that, The cushioning material of the fuel tank has an adhesive layer formed by the adhesive composition of claim 1 or 11.

16. A sealing material for an electronic component, characterized in that, The sealing material of the electronic component has an adhesive layer formed by the adhesive composition of claim 1 or 11.

17. A buffer material for lithium-ion batteries, characterized in that, The buffer material for lithium-ion batteries has an adhesive layer formed by the adhesive composition of claim 1 or 11.

18. A sealing material between the solar cell panel and the support member of a solar cell module, characterized in that, The sealing material between the solar cell panel and the support member of the solar cell module has an adhesive layer formed by the adhesive composition of claim 1 or 11.

19. A sealing material for electronic devices, characterized in that, The sealing material for the electronic device has an adhesive layer formed by the adhesive composition of claim 1 or 11.

20. A sealing material for an electrolysis apparatus, characterized in that, The sealing material for the electrolysis apparatus has an adhesive layer formed from the adhesive composition of claim 1 or 11.

21. A sealing material for an electrolysis apparatus, characterized in that, The sealing material for the electrolysis device is formed solely of an adhesive layer formed from the adhesive composition of claim 1 or 11.

Images