| 摘要 |
PURPOSE:To obtain the titled composition having excellent heat-rsistance, moldability, flexibility and strength, by partially crosslinking a crystalline polypropylene, a halogenated butyl rubber, an olefinic copolymer rubber and a modified polyolefin in the presence of a metal oxide and metal chloride. CONSTITUTION:A polymer mixture composed of (A) 10-90pts. (wt.) of a crystalline polypropylene, (B) 10-90pts. of a halogenated butyl rubber (A+B is 100pts.), (C) 10-120pts. of an olefinic copolymer rubber and (D) 1-90pts. of a modified polyolefin is partially crosslinked in the presence of a crosslinking agent consisting of a metal oxide and/or a metal chloride. The crosslinking agent is zinc oxide, magnesium oxide, zinc chloride, etc., and its amount is 0.2-10pts. per 100pts. of A+B+C+D.
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