Thermoplastic elastomer composition, materials for industrial parts comprising the composition and laminates comprising the covering materials.

摘要

A thermoplastic elastomer composition which comprises: (i) 55 - 100% by weight of a thermoplastic elastomer I obtainable by partially crosslinking a mixture consisting essentially of (A) 50 - 90 parts by weight of an oil-extended olefinic copolymer rubber containing 60 - 150 parts by weight of a mineral oil per 100 parts by weight of an olefinic copolymer rubber having a 100 DEG C Mooney viscosity (ML1+4 100 DEG C) of 200 - 350 and (C) 50 - 10 parts by weight of an olefinic polymer resin; (ii) 45-0% by weight of a thermplastic elastomer II obtainable by partially crosslinking a mixture consisting essentially of (B) 50 - 80 parts by weight of an oil-extended olefinic copolymer rubber containing 10 - 60 parts by weight of a mineral oil per 100 parts by weight of an olefinic copolymer rubber having a 100 DEG C Mooney viscosity (ML1+4 100 DEG C) of 120 or higher and lower than 200 and (D) 50 - 20 parts by weight of an olefinic polymer resin; and (iii) (E) 0 - 30% by weight of an olefinic polymer resin, said composition having a 90% stress relaxation time of 0.1 - 10 seconds in measurement of viscoelasticity at 180 DEG C.