Abstract: Provided are: a thermoplastic elastomer composition, excellent in both abrasion resistance and mechanical characteristics, obtained by heat-treating a mixture under molten condition thereof, the mixture including: 100 parts of at least one addition-polymerized block copolymer selected from a block copolymer and a hydrogenated product thereof; the block copolymer has a polymer block mainly including a structural unit derived from an aromatic vinyl compound and containing 1% by mass or more of a structural unit derived from a styrene having an alkyl group bonded to a benzene ring and a polymer block mainly including a structural unit derived from a conjugated diene compound, 10 to 300 parts olefin-based resin, 0.01 to 20 parts crosslinking agent; 1 to 50 parts crosslinking adjuvant containing one methacryloyl group, one acryloyl group, and one or more hydroxyl group, and 30 to 250 parts rubber softener; and a molded article including the said thermoplastic elastomer composition.

Abstract: Provided is a thermoplastic elastomer composition excellent in mechanical characteristics, abrasion resistance, etc., comprising: a crosslinked composition (X) obtained by heat-treating, under molten condition, a composition containing 100 pars of a block copolymer or a hydrogenated product thereof, the block copolymer including a polymer block A mainly derived from an aromatic vinyl compound containing 1% by mass or more of an alkylstyrene and a polymer block B mainly derived from a diene compound, 10 to 300 parts of an olefin-based resin, 0.01 to 20 parts of a crosslinking agent, 1 to 50 parts of a crosslinking adjuvant, and 30 to 250 parts of a softener for rubber; and a hydrogenated block copolymer (Y) obtained by hydrogenating a block copolymer having at least two polymer blocks of an aromatic vinyl compound and at least one polymer block of a conjugated diene compound, with the mass ratio of (X)/(Y)=10/90 to 90/10.

Abstract: Provided are a thermoplastic elastomer composition containing 100 parts by mass of (a) a specified hydrogenated block copolymer and 0.01 to 5 parts by mass of (b) at least one additive selected from an antioxidant and a light stabilizer, wherein the additive (b) is soluble in toluene at room temperature, and the additive (b) exists in the inside and on the surface of the pellet; and a molded article formed from the pellet.

Abstract: Provided is a method in which a polyisobutylene having a peak top molecular weight (Mp) of 5,000 to 80,000 is easily supplied to a hydrogenated block copolymer to stably produce a thermoplastic polymer composition. Specifically, provided is a method for producing a thermoplastic polymer composition containing a hydrogenated block copolymer (a) and a polyisobutylene (b) having a peak top molecular weight (Mp) of 5,000 to 80,000 expressed in terms of standard polystyrene as determined by gel permeation chromatography, the method including a following first step and a following second step. First step: a step of supplying the polyisobutylene (b) to a twin-screw/single-screw extruder of a counter-rotating type, to plasticize the polyisobutylene (b).

Abstract: To provide a thermoplastic polymer composition, which can be adhered to a synthetic resin, a ceramic or a metal without performing a primer treatment or the like, is able to be handled as a molded article, exhibits an excellent adhesive property in a broad temperature range from a low temperature to room temperature and flexibility, and has high thermal creep resistance, and a molded article using the thermoplastic polymer composition. A thermoplastic polymer composition, which contains from 10 to 100 parts by weight of a polar group-containing polypropylene-based resin (B) based on 100 parts by weight of a hydrogenated block copolymer (A) in which block copolymer containing a polymer block (S) including an aromatic vinyl compound unit and a polymer block (D) including a conjugated diene compound unit is hydrogenated, in which the hydrogenated block copolymer (A) is a mixture containing a hydrogenated block copolymer (A1) having at least one tan ? local maximum value in a range from ?60 to ?40° C.

Abstract: A film for a liquid packaging container, comprising at least one of a layer containing a resin composition (X) containing a polypropylene resin (a) and at least one of a hydrogenated block copolymer (b), the hydrogenated block copolymer (b) being a hydrogenated product of a block copolymer containing a polymer block (A) mainly containing an aromatic vinyl compound unit, and a polymer block (B) mainly containing an isoprene (Ip) unit, a butadiene (Bd) unit, or isoprene (Ip) and butadiene (Bd) units, in the resin composition (X), the hydrogenated block copolymer (b) having a phase separation structure having formed therein both (i) an island phase having a long axis of 1 ?m or more, or a bicontinuous structure, and (ii) an island phase having a long axis of 300 nm or less, and in the resin composition (X), the mass ratio ((a)/((a)+(b))) of the polypropylene resin (a) and the hydrogenated block copolymer (b) being from 61/100 to 95/100.

Abstract: The present invention relates to a method for producing a hydrogenated block copolymer, including the steps of: (a) forming a block copolymer by allowing a living polymer having a specific structure to react with a tetra- or more functional silane coupling agent; (b) hydrogenating the block copolymer to form a hydrogenated block copolymer; (c) isolating the resultant hydrogenated block copolymer; and (d) deactivating a functional group in the silane coupling agent and/or an unreacted functional group present in a coupling agent residue in the block copolymer or the hydrogenated block copolymer prior to the step (c), in which the number of functional groups derived from the coupling agent in the hydrogenated block copolymer recovered in the step (c) is 1.5 or less per block copolymer molecule; a hydrogenated block copolymer obtained by the method; and a composition containing the hydrogenated block copolymer.

Abstract: Provided is a thermoplastic elastomer composition excellent in mechanical characteristics, abrasion resistance, etc., comprising: a crosslinked composition (X) obtained by heat-treating, under molten condition, a composition containing 100 pars of a block copolymer or a hydrogenated product thereof, the block copolymer including a polymer block A mainly derived from an aromatic vinyl compound containing 1% by mass or more of an alkylstyrene and a polymer block B mainly derived from a diene compound, 10 to 300 parts of an olefin-based resin, 0.01 to 20 parts of a crosslinking agent, 1 to 50 parts of a crosslinking adjuvant, and 30 to 250 parts of a softener for rubber; and a hydrogenated block copolymer (Y) obtained by hydrogenating a block copolymer having at least two polymer blocks of an aromatic vinyl compound and at least one polymer block of a conjugated diene compound, with the mass ratio of (X)/(Y)=10/90 to 90/10.

Abstract: Provided are: a thermoplastic elastomer composition, excellent in both abrasion resistance and mechanical characteristics, obtained by heat-treating a mixture under molten condition thereof, the mixture including: 100 parts of at least one addition-polymerized block copolymer selected from a block copolymer and a hydrogenated product thereof; the block copolymer has a polymer block mainly including a structural unit derived from an aromatic vinyl compound and containing 1% by mass or more of a structural unit derived from a styrene having an alkyl group bonded to a benzene ring and a polymer block mainly including a structural unit derived from a conjugated diene compound, 10 to 300 parts olefin-based resin, 0.01 to 20 parts crosslinking agent; 1 to 50 parts crosslinking adjuvant containing one methacryloyl group, one acryloyl group, and one or more hydroxyl group, and 30 to 250 parts rubber softener; and a molded article including the said thermoplastic elastomer composition.

Abstract: A film for a liquid packaging container, comprising at least one of a layer containing a resin composition (X) containing a polypropylene resin (a) and at least one of a hydrogenated block copolymer (b), the hydrogenated block copolymer (b) being a hydrogenated product of a block copolymer containing a polymer block (A) mainly containing an aromatic vinyl compound unit, and a polymer block (B) mainly containing an isoprene (Ip) unit, a butadiene (Bd) unit, or isoprene (Ip) and butadiene (Bd) units, in the resin composition (X), the hydrogenated block copolymer (b) having a phase separation structure having formed therein both (i) an island phase having a long axis of 1 ?m or more, or a bicontinuous structure, and (ii) an island phase having a long axis of 300 nm or less, and in the resin composition (X), the mass ratio ((a)/((a)+(b))) of the polypropylene resin (a) and the hydrogenated block copolymer (b) being from 61/100 to 95/100.

Abstract: A thermoplastic elastomer composition includes a hydrogenated block copolymer, which is obtained by hydrogenating a block copolymer having two or more polymer blocks (a) each containing a structural unit derived from an aromatic vinyl compound and one or more polymer blocks (b) each containing structural units derived from isoprene and 1,3-butadiene, a thermoplastic resin, and a rubber softener. The hydrogenated block copolymer has a crystallization peak temperature (Tc) of ?3 to 15° C.

Abstract: Provided are a thermoplastic elastomer composition containing 100 parts by mass of (a) a specified hydrogenated block copolymer and 0.01 to 5 parts by mass of (b) at least one additive selected from an antioxidant and a light stabilizer, wherein the additive (b) is soluble in toluene at room temperature, and the additive (b) exists in the inside and on the surface of the pellet; and a molded article formed from the pellet.

Abstract: A film for a liquid packaging container, comprising at least one of a layer containing a resin composition (X) containing a polypropylene resin (a) and at least one of a hydrogenated block copolymer (b), the hydrogenated block copolymer (b) being a hydrogenated product of a block copolymer containing a polymer block (A) mainly containing an aromatic vinyl compound unit, and a polymer block (B) mainly containing an isoprene (Ip) unit, a butadiene (Bd) unit, or isoprene (Ip) and butadiene (Bd) units, in the resin composition (X), the hydrogenated block copolymer (b) having a phase separation structure having formed therein both (i) an island phase having a long axis of 1 ?m or more, or a bicontinuous structure, and (ii) an island phase having a long axis of 300 nm or less, and in the resin composition (X), the mass ratio ((a)/((a)+(b))) of the polypropylene resin (a) and the hydrogenated block copolymer (b) being from 61/100 to 95/100.

Abstract: Provided is a liquid packaging container having satisfactory flexibility and transparency, high heat-seal strength, high bag-breaking strength at normal temperature and low temperatures, and low (inner layer)-(inner layer) adhesiveness, which are properties important for liquid packaging containers for medical use.

Abstract: A film for a liquid packaging container, comprising at least one of a layer containing a resin composition (X) containing a polypropylene resin (a) and at least one of a hydrogenated block copolymer (b), the hydrogenated block copolymer (b) being a hydrogenated product of a block copolymer containing a polymer block (A) mainly containing an aromatic vinyl compound unit, and a polymer block (B) mainly containing an isoprene (Ip) unit, a butadiene (Bd) unit, or isoprene (Ip) and butadiene (Bd) units, in the resin composition (X), the hydrogenated block copolymer (b) having a phase separation structure having formed therein both (i) an island phase having a long axis of 1 ?m or more, or a bicontinuous structure, and (ii) an island phase having a long axis of 300 nm or less, and in the resin composition (X), the mass ratio ((a)/((a)+(b))) of the polypropylene resin (a) and the hydrogenated block copolymer (b) being from 61/100 to 95/100.

Abstract: Provided is a liquid packaging container having satisfactory flexibility and transparency, high heat-seal strength, high bag-breaking strength at normal temperature and low temperatures, and low (inner layer)-(inner layer) adhesiveness, which are properties important for liquid packaging containers for medical use.

Abstract: Provided are a block copolymer and a thermoplastic elastomer composition each of which is excellent in both tensile strength and elastic recovery, and has good abrasion resistance. Specifically, provided are a hydrogenated block copolymer, which is obtained by hydrogenating a block copolymer having two or more polymer blocks (a) each containing a structural unit derived from an aromatic vinyl compound and one or more polymer blocks (b) each containing structural units derived from isoprene and 1,3-butadiene, in which the hydrogenated block copolymer has a crystallization peak temperature (Tc) defined as described below of ?3 to 15° C., and a thermoplastic elastomer composition containing the hydrogenated block copolymer: (crystallization peak temperature (Tc)) a peak top temperature of an exothermic peak observed when the temperature of a sample is increased from 30° C. to 150° C. at a rate of temperature increase of 10° C./min and then the sample is cooled to ?100° C.

Abstract: The present invention relates to a method for producing a hydrogenated block copolymer, including the steps of: (a) forming a block copolymer by allowing a living polymer having a specific structure to react with a tetra- or more functional silane coupling agent; (b) hydrogenating the block copolymer to form a hydrogenated block copolymer; (c) isolating the resultant hydrogenated block copolymer; and (d) deactivating a functional group in the silane coupling agent and/or an unreacted functional group present in a coupling agent residue in the block copolymer or the hydrogenated block copolymer prior to the step (c), in which the number of functional groups derived from the coupling agent in the hydrogenated block copolymer recovered in the step (c) is 1.5 or less per block copolymer molecule; a hydrogenated block copolymer obtained by the method; and a composition containing the hydrogenated block copolymer.

Abstract: A hydrogenated block copolymer having two or more polymer blocks (a) each with a structural unit derived from an aromatic vinyl compound and one or more polymer blocks (b) each with structural units derived from isoprene and 1,3-butadiene, the hydrogenated block copolymer having a crystallization peak temperature of ?3 to 15° C.

Abstract: The present invention relates to a method for producing a hydrogenated block copolymer, including the steps of: (a) forming a block copolymer by allowing a living polymer having a specific structure to react with a tetra- or more functional silane coupling agent; (b) hydrogenating the block copolymer to form a hydrogenated block copolymer; (c) isolating the resultant hydrogenated block copolymer; and (d) deactivating a functional group in the silane coupling agent and/or an unreacted functional group present in a coupling agent residue in the block copolymer or the hydrogenated block copolymer prior to the step (c), in which the number of functional groups derived from the coupling agent in the hydrogenated block copolymer recovered in the step (c) is 1.5 or less per block copolymer molecule; a hydrogenated block copolymer obtained by the method; and a composition containing the hydrogenated block copolymer.