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A composition having a composition containing substantially no other engineering thermoplastic resin and a compression set (JIS K 6301; 100°C.×22 hours; and compressibility, 25%) of 65% or less as rubber which comprises: (a) 100 parts by weight of a hydrogenated block copolymer obtained by hydrogena

A composition having a composition containing substantially no other engineering thermoplastic resin and a compression set (JIS K 6301; 100°C.×22 hours; and compressibility, 25%) of 65% or less as rubber which comprises: (a) 100 parts by weight of a hydrogenated block copolymer obtained by hydrogenating a block copolymer comprising at least two polymer blocks A composed mainly of a vinyl-substituted aromatic hydrocarbon and at least one polymer block B composed mainly of a conjugated diene, (b) 11 to 233 parts by weight of a homopolymeric and/or copolymeric polyphenylene ether resin comprising a binding unit represented by the general formula, [Figure] wherein R1, R2, R3 and R4, which may be the same or different, represent substituents selected from the group consisting of hydrogen, halogen, hydrocarbon groups and substituted hydrocarbon groups, and having a reduced viscosity in a range of from 0.15 to 0.70 as measured at 30°C. in a 0.5 g/dl chloroform solution, (c) 10 to 500 parts by weight of a non-aromatic softening agent for rubber, and (d) 5 to 150 parts by weight of a polyolefin resin and/or a polystyrene resin.

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A composition having a compression set (JIS K 6301; 100°C.×22 hours; and compressibility, 25%) of 65% or less as rubber, consisting essentially of: (a) 100 parts by weight of a hydrogenated block copolymer obtained by hydrogenating a block copolymer comprising at least two polymer blocks A composed

A composition having a compression set (JIS K 6301; 100°C.×22 hours; and compressibility, 25%) of 65% or less as rubber, consisting essentially of: (a) 100 parts by weight of a hydrogenated block copolymer obtained by hydrogenating a block copolymer comprising at least two polymer blocks A composed mainly of a vinyl-substituted aromatic hydrocarbon and at least one polymer block B composed mainly of a conjugated diene, (b) 11 to 233 parts by weight of a polymer selected from the group consisting of a homopolymeric polyphenylene ether resin, a copolymeric polyphenylene ether resin and combinations thereof, comprising a binding unit represented by the general formula, [Figure] wherein R1, R2, R3 and R4, which may be the same or different, represent substituents selected from the group consisting of hydrogen, halogen, hydrocarbon groups and substituted hydrocarbon groups, and having a reduced viscosity in a range of from 0.15 to 0.70 as measured at 30°C. in a 0.5 g/dl chloroform solution, (c) 10 to 500 parts by weight of a non-aromatic softening agent for rubber, and (d) 5 to 150 parts by weight of a resin selected from the group consisting of a polyolefin resin, a polystyrene resin and a combination thereof.