Abstract: Provided are a (meth)acrylic block copolymer exhibiting good active energy ray curability, in particular, curability of a blend thereof with an acrylate monomer, and an active energy ray curable composition comprising the (meth)acrylic block copolymer. The (meth)acrylic block copolymer includes a methacrylic polymer block (A) having an active energy ray curable group including a partial structure represented by the general formula (1) below wherein R1 denotes a hydrocarbon group having 1 to 10 carbon atoms, and W denotes a saturated hydrocarbon group having 1 to 10 carbon atoms, and an acrylic polymer block (B) having no active energy ray curable groups.

Abstract: A bend sensor comprising a sensor section in which a polymer electrolyte film is sandwiched between a pair of electrode films, wherein each of the electrode films contains: a block copolymer (Z) having a polymer block (S) composed of a structural unit derived from an aromatic vinyl compound, and containing an ion-conducting group, and an amorphous polymer block (T) composed of a structural unit derived from an unsaturated aliphatic hydrocarbon; and a conducting particle; which block copolymer (Z) forms a lamellar structure, which bend sensor therefore allows generation of enhanced voltage between the electrode films when deformation of the sensor occurs as it follows movement of an object, is provided.

Abstract: A bend sensor comprising a sensor section in which a polymer electrolyte film is sandwiched between a pair of electrode films, wherein each of the electrode films contains: a block copolymer (Z) having a polymer block (S) composed of a structural unit derived from an aromatic vinyl compound, and containing an ion-conducting group, and an amorphous polymer block (T) composed of a structural unit derived from an unsaturated aliphatic hydrocarbon; and a conducting particle; which block copolymer (Z) forms a lamellar structure, which bend sensor therefore allows generation of enhanced voltage between the electrode films when deformation of the sensor occurs as it follows movement of an object, is provided.

Abstract: Provided are a (meth)acrylic block copolymer exhibiting good active energy ray curability, in particular, curability of a blend thereof with an acrylate monomer, and an active energy ray curable composition comprising the (meth)acrylic block copolymer. The (meth)acrylic block copolymer includes a methacrylic polymer block (A) having an active energy ray curable group including a partial structure represented by the general formula (1) below wherein R1 denotes a hydrocarbon group having 1 to 10 carbon atoms, and W denotes a saturated hydrocarbon group having 1 to 10 carbon atoms, and an acrylic polymer block (B) having no active energy ray curable groups.

Abstract: The present invention provides a dental polymerizable composition that requires less discharging force, is easily formable, has low polymerization shrinkage stress during curing, and exhibits high stain resistance and surface gloss when cured. The present invention relates to a dental polymerizable composition including a (meth)acrylic block copolymer (A), a polymerizable monomer (B), and a polymerization initiator (C). The (meth)acrylic block copolymer (A) consists of a (meth)acrylic polymer block (a) having a curable functional group and a (meth)acrylic polymer block (b) having no curable functional group.

Abstract: The invention provides a (meth)acrylic block copolymer that exhibits a high curing rate when irradiated with active energy rays and also has a low viscosity. The (meth)acrylic block copolymer includes a methacrylic polymer block (a1) and a methacrylic polymer block (a2) that each have an active energy ray curable group including a partial structure (1) of the following general formula (1), and further includes an acrylic polymer block (B) that has no active energy ray curable groups and is present between the methacrylic polymer block (a1) and the methacrylic polymer block (a2). The content of monomer units derived from methyl methacrylate relative to all monomer units in the methacrylic polymer block (a1) and the methacrylic polymer block (a2) is not less than 30 mass %. The content of monomer units derived from an alkyl acrylate ester having an alkyl group with 6 or more carbon atoms relative to all monomer units in the acrylic polymer block (B) is not less than 40 mass %.

Abstract: A bend sensor comprising a sensor section in which a polymer electrolyte film is sandwiched between a pair of electrode films, wherein each of the electrode films contains: a block copolymer (Z) having a polymer block (S) composed of a structural unit derived from an aromatic vinyl compound, and containing an ion-conducting group, and an amorphous polymer block (T) composed of a structural unit derived from an unsaturated aliphatic hydrocarbon; and a conducting particle; which block copolymer (Z) forms a lamellar structure, which bend sensor therefore allows generation of enhanced voltage between the electrode films when deformation of the sensor occurs as it follows movement of an object, is provided.

Abstract: The present invention provides a dental polymerizable composition that requires less discharging force, is easily formable, has low polymerization shrinkage stress during curing, and exhibits high stain resistance and surface gloss when cured. The present invention relates to a dental polymerizable composition including a (meth)acrylic block copolymer (A), a polymerizable monomer (B), and a polymerization initiator (C). The (meth)acrylic block copolymer (A) consists of a (meth)acrylic polymer block (a) having a curable functional group and a (meth)acrylic polymer block (b) having no curable functional group.

Abstract: The invention provides active energy ray curable compositions which exhibit good curability with active energy rays and which have a low viscosity to attain excellent application properties when applied as materials such as adhesives or coatings onto substrates and can give highly flexible cured products upon irradiation with active energy rays.

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: The present invention provides a composition to for production of electrode films contained in a sensor formed by sandwiching a polymer electrolyte film between two electrode films, which composition can increase the intensity of the electric signal that can be output by the sensor. The composition comprises: a diblock polymer (A) having a structure in which, in a diblock polymer (A0) having no ion-conducting group composed of a polymer block (S0) containing a structural unit derived from an aromatic vinyl compound having a number average molecular weight of not less than 20,000 and an amorphous polymer block (T) containing a structural unit derived from an unsaturated aliphatic hydrocarbon, an ion-conducting group(s) is/are introduced to the polymer block (S0); a hydrocarbon solvent (B); an organic solvent (C) having at least one functional group selected from the group consisting of hydroxyl, carbonyl, alkoxycarbonyl, and amide; and a conductive filler (D).

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: 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: A thermoplastic polymer composition has good flexibility, lightweight properties, moldability, and heat resistance, and in particular, is excellent in wear resistance. The thermoplastic polymer composition includes: at least one block copolymer (a) selected from among an ?-methylstyrene based block copolymer having a number average molecular weight of 30,000 to 500,000 and a hydrogenated product thereof, the ?-methylstyrene based block copolymer including a polymer block A mainly composed of an ?-methylstyrene unit and a polymer block B mainly composed of a conjugated diene unit; a propylene-based polymer (b); and an ethylene-based polymer (c) having a density of 0.94 g/cm3 or less, in a ratio satisfying the following inequalities (1) and (2): 0.1?W(a)/[W(a)+W(b)+W(c)]?0.8??(1) 1?W(b)/W(c)??(2) wherein W(a), W(b), and W(c) represent the masses of the block copolymer (a), the propylene-based polymer (b), and the ethylene-based polymer (c), respectively.

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: A polyolefin-based resin composition of the invention has an addition polymerization-based block copolymer (I) and a polyolefin-based resin (II). The addition polymerization-based block copolymer (I) is selected from block copolymers comprising at least one polymer block A and at least one polymer block B, and the hydrogenated products thereof. The polymer block A comprises an aromatic vinyl compound unit comprising at least 1% by mass of an alkylstyrene-derived structural unit (a), in which at least one alkyl group having 1 to 8 carbon atoms is bound to a benzene ring. The polymer block B comprises a conjugated diene compound unit. A moiety of polymer block A can undergo crosslinking upon exposure to an active energy ray. After being molded into a desired shape, the composition is exposed to an active energy ray to carry out the crosslinking reaction. The composition exhibits flexibility, heat resistance, mechanical properties and solvent resistance in a well-balanced manner.

Abstract: The invention provides a thermoplastic resin composition including a thermoplastic resin component (I) in an amount of 100 parts by mass, and a filler (II) in an amount of 1 to 900 parts by mass, wherein the thermoplastic resin component (I) contains a block copolymer (A) in an amount of 5 to 90 mass %, the block copolymer (A) being at least one species selected from among a block copolymer and a hydrogenated product thereof, the block copolymer having a polymer block (a1) formed mainly of an aromatic vinyl compound unit(s), and a polymer block (a2) formed mainly of a conjugated diene unit(s); a polyolefin resin (B) in an amount of 5 to 90 mass %; and a block copolymer (C) in an amount of 5 to 90 mass %, the block copolymer (C) having a polymer block formed from a repeating unit having a polar group.

Abstract: The invention provides a polymer composition containing an addition polymerization-based block copolymer (a), an acrylic resin (b), and a softener (c), wherein the addition polymerization-based block copolymer (a) has a weight average molecular weight of 30000 to 200000 and is at least one selected from block copolymers comprising at least one polymer block A and at least one polymer block B, and hydrogenated products of the block copolymers; the polymer block A essentially comprises an aromatic vinyl compound unit containing at least 1% by mass of an alkylstyrene-derived structural unit (I) in which at least one alkyl group having 1 to 8 carbon atoms is bound to a benzene ring; the block copolymer B comprises a conjugated diene compound unit; and the components of the polymer composition are present in respective proportions (by mass) so that the following relationships (1) and (2) hold: 0.05?Wb/Wa?2??(1) Wc/(Wa+Wb+Wc)?0.

Abstract: The invention provides a thermoplastic resin composition including a thermoplastic resin component (I) in an amount of 100 parts by mass, and a filler (II) in an amount of 1 to 900 parts by mass, wherein the thermoplastic resin component (I) contains a block copolymer (A) in an amount of 5 to 90 mass %, the block copolymer (A) being at least one species selected from among a block copolymer and a hydrogenated product thereof, the block copolymer having a polymer block (a1) formed mainly of an aromatic vinyl compound unit(s), and a polymer block (a2) formed mainly of a conjugated diene unit(s); a polyolefin resin (B) in an amount of 5 to 90 mass %; and a block copolymer (C) in an amount of 5 to 90 mass %, the block copolymer (C) having a polymer block formed from a repeating unit having a polar group.

Abstract: The present invention relates to a rubber composition comprising 100 parts by mass of a solid diene-based rubber (1), 5 to 150 parts by mass of silica (2), 0.1 to 50 parts by mass of a liquid diene-based rubber (3) which is modified with an unsaturated carboxylic acid and/or derivative thereof and has a number average molecular weight of 5000 to 100000, and further 0,1 to 50 parts by mass of an unmodified liquid diene-based rubber (4) having a number average molecular weight of 5000 to 100000 with respect to 100 parts by mass of the solid diene-based rubber (1) and/or 1.5 to 14.0 parts by mass of water (5) with respect to 100 parts by mass of silica (2), and a crosslinked product obtained by crosslinking the rubber composition. A rubber composition obtained by the present invention is improved in processability when silica is added and mixed with a diene-based rubber and is excellent in dynamic properties after crosslinking.