Abstract: The present invention provides a modified block copolymer composition comprising a modified block copolymer containing at least one aromatic vinyl polymer block and at least one conjugated diene polymer block, and having at least one modified terminal modified with a compound having a silicon atom and an acrylic group and/or a methacrylic group.

Abstract: Provided is a thermoplastic elastomer composition for an impact-resistant material, comprising a block copolymer composition comprising a block copolymer (B) in which a functional group capable of noncovalent bonding is introduced into a block copolymer (A) including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.

Abstract: A main purpose of the present invention is to provide a multi-block copolymer composition having good elasticity and excellent stress relaxation properties, as well as small tension set. The present invention achieves the purpose by providing a multi-block copolymer composition obtained by a modification treatment, the composition including a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond to a block copolymer A; wherein the block copolymer A includes a block copolymer A1 having a specific primary structure and a block copolymer A2 having a specific primary structure, and the mass ratio (A1/A2) of the block copolymer A1 and the block copolymer A2 is 100/0 to 50/50.

Abstract: A main object of the present invention is to provide a block copolymer composition which has good elasticity, while having excellent stress relaxation properties. The object is achieved by providing a block copolymer composition obtained by a modification treatment, the block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.

Abstract: The present invention provides a block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block, wherein: the block copolymer B includes an ionic group as the functional group capable of forming a non-covalent bond.

Abstract: A tetrablock copolymer having an aromatic vinyl block (A1), a conjugated diene block (B1), an aromatic vinyl block (A2), and a conjugated diene block (B2) is provided, wherein Mw(A2)/Mw(A1) is 1.2 to 5, Mw(A2) is 12,000 or more, Mw(B1)>Mw(B2), Mw(Total) is 50,000 to 400,000 where the weight average molecular weight of the aromatic vinyl block (A1) is defined as Mw(A1), the weight average molecular weight of the conjugated diene block (B1) is defined as Mw(B1), the weight average molecular weight of the aromatic vinyl block (A2) is defined as Mw(A2), the weight average molecular weight of the conjugated diene block (B2) is defined as Mw(B2), and the weight average molecular weight of the tetrablock copolymer as a whole is defined as Mw(Total), and the content of aromatic vinyl monomer units is 10 to 30% by weight.

Abstract: The present invention provides a block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block, wherein: the block copolymer B includes an ionic group as the functional group capable of forming a non-covalent bond.

Abstract: A tetrablock copolymer having an aromatic vinyl block (A1), a conjugated diene block (B1), an aromatic vinyl block (A2), and a conjugated diene block (B2) is provided, wherein Mw(A2)/Mw(A1) is 1.2 to 5, Mw(A2) is 12,000 or more, Mw(B1)>Mw(B2), Mw(Total) is 50,000 to 400,000 where the weight average molecular weight of the aromatic vinyl block (A1) is defined as Mw(A1), the weight average molecular weight of the conjugated diene block (B1) is defined as Mw(B1), the weight average molecular weight of the aromatic vinyl block (A2) is defined as Mw(A2), the weight average molecular weight of the conjugated diene block (B2) is defined as Mw(B2), and the weight average molecular weight of the tetrablock copolymer as a whole is defined as Mw(Total), and the content of aromatic vinyl monomer units is 10 to 30% by weight.

Abstract: A main object of the present disclosure is to provide a block copolymer composition that allows a hot melt adhesive composition having excellent hot melt properties and heat resistance stability to be obtained. The object is achieved by providing a block copolymer composition comprising a block copolymer A including an Ar1-D1 diblock as a branched chain, the block copolymer A represented by the following general formula (I), characterized in that: a molecular weight distribution (Mw/Mn) of the block copolymer A is 1.20 or less; a content of the block copolymer A in the block copolymer composition is 10% by mass or more; a content of a block copolymer B corresponding to an Ar2-D2 diblock represented by the following general formula (II), in the block copolymer composition is 60% by mass or less, and a molecular weight distribution (Mw/Mn) of the block copolymer B is 1.

Abstract: The present invention provides a modified block copolymer composition comprising a modified block copolymer containing at least one aromatic vinyl polymer block and at least one conjugated diene polymer block, and having at least one modified terminal modified with a compound having a silicon atom and an acrylic group and/or a methacrylic group.

Abstract: A main purpose of the present invention is to provide a multi-block copolymer composition having good elasticity and excellent stress relaxation properties, as well as small tension set. The present invention achieves the purpose by providing a multi-block copolymer composition obtained by a modification treatment, the composition including a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond to a block copolymer A; wherein the block copolymer A includes a block copolymer A1 having a specific primary structure and a block copolymer A2 having a specific primary structure, and the mass ratio (A1/A2) of the block copolymer A1 and the block copolymer A2 is 100/0 to 50/50.

Abstract: A main object of the present disclosure is to provide a block copolymer composition that allows an adhesive composition having excellent die-cutting properties, softening agent anti-migration performance, mandrel properties and transparency to be obtained.

Abstract: A main object of the present invention is to provide a block copolymer composition which has good elasticity, while having excellent stress relaxation properties. The object is achieved by providing a block copolymer composition obtained by a modification treatment, the block copolymer composition comprising a block copolymer B formed by introducing a functional group capable of forming a non-covalent bond into a block copolymer A including at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.

Abstract: Provided are a modified hydrocarbon resin that can provide a hot-melt adhesive composition with low odor, low Gardner color and high peel adhesion, a method for producing the resin, and the hot-melt adhesive composition. A modified hydrocarbon resin comprising a 1,3-pentadiene monomer unit, a C4-C6 alicyclic monoolefin monomer unit, a C4-C8 acyclic monoolefin monomer unit, an alicyclic diolefin monomer unit, and an aromatic monoolefin monomer unit, and containing a carboxyl group or acid anhydride group, wherein a weight average molecular weight (Mw), a Z average molecular weight (Mz), a ratio (Mz/Mw), a Gardner color scale of a 50 mass % toluene solution, a softening point, and an acid value are in specific ranges.

Abstract: Provided is a modified hydrocarbon resin that provides a hot melt adhesive composition with low odor, excellent heat stability, and high adhesive properties. The modified hydrocarbon resin is obtained by hydrogenating a hydrocarbon resin comprising a plurality of specific monomeric unit in a specific range, and characterized in that: a degree of hydrogenation of the olefins, a degree of hydrogenation of the aromatic rings, a weight average molecular weight (Mw), a Z-average molecular weight (Mz), a ratio (Mz/Mw) of the Z-average molecular weight to the weight-average molecular weight, a Gardner color scale of a toluene solution of 50 mass %, and a difference between pre-hydrogenation and post-hydrogenation mixed aniline point (MMAP) are within the specific range.

Abstract: Provided is a modified hydrocarbon resin that provides a hot melt adhesive composition with low odor, excellent heat stability, and high adhesive properties. The modified hydrocarbon resin is obtained by hydrogenating a hydrocarbon resin comprising a plurality of specific monomeric unit in a specific range, and characterized in that: a degree of hydrogenation of the olefins, a degree of hydrogenation of the aromatic rings, a weight average molecular weight (Mw), a Z-average molecular weight (Mz), a ratio (Mz/Mw) of the Z-average molecular weight to the weight-average molecular weight, a Gardner color scale of a toluene solution of 50 mass %, and a difference between pre-hydrogenation and post-hydrogenation mixed aniline point (MMAP) are within the specific range.

Abstract: The present invention is a block copolymer composition comprising an aromatic vinyl-isoprene-aromatic vinyl triblock copolymer (A) and an aromatic vinyl-isoprene diblock copolymer (B), (i) a ratio (MwDa/MwDb) of a weight average molecular weight MwDa of a polyisoprene block in the triblock copolymer (A) to a weight average molecular weight MwDb of a polyisoprene block in the diblock copolymer (B) being 0.5 or more to less than 1, (ii) a ratio of an aromatic vinyl monomer unit in all polymer components of the block copolymer composition being 10 to 30 mass %, and (iii) the block copolymer composition having a breaking strength of less than 8 MPa and an elongation at break of less than 1,100%; a pressure-sensitive adhesive composition comprising the block copolymer composition and a tackifying resin; and a pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer that comprises the pressure-sensitive adhesive composition.

Abstract: A main object of the present disclosure is to provide a block copolymer composition that allows an adhesive composition having excellent die-cutting properties, softening agent anti-migration performance, mandrel properties and transparency to be obtained.

Abstract: Provided are a modified hydrocarbon resin that can provide a hot-melt adhesive composition with low odor, low Gardner color and high peel adhesion, a method for producing the resin, and the hot-melt adhesive composition. A modified hydrocarbon resin comprising a 1,3-pentadiene monomer unit, a C4-C6 alicyclic monoolefin monomer unit, a C4-C8 acyclic monoolefin monomer unit, an alicyclic diolefin monomer unit, and an aromatic monoolefin monomer unit, and containing a carboxyl group or acid anhydride group, wherein a weight average molecular weight (Mw), a Z average molecular weight (Mz), a ratio (Mz/Mw), a Gardner color scale of a 50 mass % toluene solution, a softening point, and an acid value are in specific ranges.

Abstract: A main object of the present disclosure is to provide a block copolymer composition that allows a hot melt adhesive composition having excellent hot melt properties and heat resistance stability to be obtained. The object is achieved by providing a block copolymer composition comprising a block copolymer A including an Ar1-D1 diblock as a branched chain, the block copolymer A represented by the following general formula (I), characterized in that: a molecular weight distribution (Mw/Mn) of the block copolymer A is 1.20 or less; a content of the block copolymer A in the block copolymer composition is 10% by mass or more; a content of a block copolymer B corresponding to an Ar2-D2 diblock represented by the following general formula (II), in the block copolymer composition is 60% by mass or less, and a molecular weight distribution (Mw/Mn) of the block copolymer B is 1.