| 摘要 |
An elastomer composition which comprises (a) 100 parts by weight of a hydrogenated block copolymer mixture comprising: (a-1) 10 to 60 parts by weight of a block copolymer prepared by hydrogenating a block copolymer that comprises: at least two polymer blocks A each mainly comprising a vinyl aromatic compound; and at least one polymer block B mainly comprising a conjugated diene compound, the hydrogenated block copolymer having a number average molecular weight of from more than 200,000 to not more than 400,000 and a content of the polymer block A of from 15 to 40% by weight of said block copolymer; and (a-2) 40 to 90 parts by weight of a block copolymer prepared by hydrogenating a block copolymer that comprises: at least one polymer block A mainly comprising a vinyl aromatic compound; and at least one polymer block B mainly comprising a conjugated diene compound, the hydrogenating block copolymer having a number average molecular weight of from more than 30,000 to not more than 140,000 and a content of the polymer block A of from 8 to 35% by weight of said block copolymer; and (b) 30 to 125 parts by weight of a polypropylene resin having a melt flow rate of from 5 to 100 g/10 minutes; (c) 0 to 50 parts by weight of a hydrocarbon oil. Also disclosed is a housing cover of air bag apparatus, which comprises the elastomer composition.
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