Patent ID: 6316068
Filing Date: 2001-11-13
Classification: B60R,C08L,Y10T

Abstract:
A housing cover of air bag apparatus which comprises 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; anda 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) 5to 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 .mu.m 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.