| abstract |
An elastomer composition which comprises: (a) 100 parts by weight of a hydrogenated block copolymer prepared by hydrogenating a block copolymer that comprises: a polymer block A mainly comprising at least one vinyl aromatic compound; and a polymer block B mainly comprising at least one conjugate diene, and has a number average molecular weight of from 30,000 to 400,000 and a content of the polymer block A of from 10 to 50% by weight based on the weight of said block copolymer; (b) 5 to 900 parts by weight of a polypropylene mixture comprising: (b-1) 10 to 60% by weight of a polypropylene polymer having a propylene content of 85% by weight or more; and (b-2) 40 to 90% by weight of an ethylene-propylene copolymer rubber having a propylene content of 75% by weight or more, wherein the ethylene-propylene copolymer rubber in said mixture has an average dispersed particle size of not more than 2 mum and said mixture has a bending modulus of from 20 to 700 Mpa, a Shore D hardness of from 20 to 60 and a melt flow rate of from 10 to 60 g/10 minutes; and (c) 0 to 200 parts by weight of a hydrocarbon oil. Also disclosed is a housing cover of air bag apparatus, which comprises the elastomer composition. |