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    • 8. 发明授权
    • Polypropylene resin composition with tapered triblock copolymer
    • 具有锥形三嵌段共聚物的聚丙烯树脂组合物
    • US6166134A
    • 2000-12-26
    • US317009
    • 1999-05-24
    • Michael John ModicNorio Masuko
    • Michael John ModicNorio Masuko
    • C08L23/10C08L53/00C08L47/00C08L53/02
    • C08L23/10C08L53/00C08L53/02C08L2205/02C08L2666/24C08L2666/02
    • The present invention is a unique polypropylene copolymer resin composition which comprises a propylene-ethylene copolymer having a melt flow rate of at least 50 g/10 min and an impact modifier which comprises a thermoplastic elastomer of a hydrogenated triblock copolymer which has a specific structure in which a block of a tapered increment of an vinyl aromatic hydrocarbon portion is arranged after the isoprene homopolymer block. Accordingly, the present invention provides a polypropylene resin composition comprising(a) 55 to 87% by weight of a propylene-ethylene block copolymer having a melt flow rate of at least 50 g/10 minutes; and(b) 3 to 20% by weight of an impact modifier which is comprised of at least 50% by weight of a hydrogenated block copolymer having a number average molecular weight between 50,000 and 150,000 and containing 15 to 25% by weight of an vinyl aromatic hydrocarbon, obtained by hydrogenating a triblock copolymer having the structure A-B-(A/B) wherein A is a vinyl aromatic hydrocarbon homopolymer, B is an isoprene homopolymer, and (A/B) is a block of a tapered isoprene-vinyl aromatic hydrocarbon copolymer, and the balance an olefinic rubber; and(c) 10 to 25% by weight of talc.
    • 本发明是一种独特的聚丙烯共聚物树脂组合物,其包含熔体流动速率为至少50g / 10min的丙烯 - 乙烯共聚物和抗冲改性剂,其包含氢化三嵌段共聚物的热塑性弹性体,其具有特定结构 在异戊二烯均聚物嵌段之后设置一个乙烯基芳族烃部分的渐变增量的块。 因此,本发明提供一种聚丙烯树脂组合物,其包含(a)55〜87重量%的熔体流动速率为至少50g / 10分钟的丙烯 - 乙烯嵌段共聚物; 和(b)3至20重量%的抗冲改性剂,其由至少50重量%的数均分子量为50,000至150,000并包含15至25重量%的乙烯基的氢化嵌段共聚物 通过氢化具有结构AB-(A / B)的三嵌段共聚物而获得的芳族烃,其中A是乙烯基芳族烃均聚物,B是异戊二烯均聚物,和(A / B)是一种锥形异戊二烯 - 乙烯基芳族化合物 烃共聚物,余量为烯属橡胶; 和(c)10至25重量%的滑石。