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    Resin composition for automobile bumper
    1.
    发明公开
    Resin composition for automobile bumper 失效
    HarbusammensetzungfürAutomobilstossstangen。

    公开(公告)号：EP0509662A1

    公开(公告)日：1992-10-21

    申请号：EP92302737.9

    申请日：1992-03-27

    申请人： UBE INDUSTRIES, LTD. ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

    发明人： Fukui, Osamu ,  Nakano, Yoshifumi ,  Ueno, Kouhei ,  Hamada, Yukimasa ,  Nishio, Takeyoshi ,  Nomura, Takao ,  Kawamura, Nobuya

    IPC分类号： C08L53/00

    CPC分类号： C08L53/00 ,  B60R19/03 ,  C08L23/0815 ,  C08L23/16 ,  C08L53/02 ,  C08L2205/02 ,  C08L2666/04 ,  C08L2666/24

    摘要： A resin composition for an automobile bumper comprising components (A), (B), and (C) described below:

    (A) 45 to 74% by weight of a crystalline ethylene-propylene block copolymer having (a) a flexural modulus of 15,000 kg/cm² or more, (b) an ethylene content of 5 to 20% by weight, (c) an intrinsic viscosity (decalin, 135°C) of a portion soluble in p-xylene at room temperature of 3 or more, (d) a melt flow index (MI) of 21 to 70 g/10 min., and (e) a content of a portion insoluble in boiling n-heptane of 97% by weight or more;
    (B) 21 to 35% by weight of elastomer selected from the group consisting of components (I), (II) and (III) and having a weight ratio of (I) : [(I) + (II) + (III)] of from 0.5 to 1.0, (a) said component (1) being an amorphous ethylene-butene copolymer having a butene content of 10 to 25% by weight and a Mooney viscosity value, (ML₁₊₄, 100°C) of 5 to 20, (b) said component (II) being an amorphous ethylene-propylene copolymer having an ethylene content of 70 to 90% by weight and a Mooney viscosity value (ML₁₊₄, 100°C) of 5 to 40, and (c) said component (III) being a hydrogenated block copolymer consisting of 10 to 40% by weight of an aromatic vinyl polymer block X and 60 to 90% by weight of a conjugate diene polymer block Y, having a structure of said block components being X - Y or X - (Y - X) n , wherein n is 1 or 2, 90 mol% or more of said block Y being hydrogenated and the melt flow index (MI) of the hydrogenated block copolymer being 5 g/10 min. (230°C, 2.16 kg) or more, and;
    (C) 5 to 10% by weight of talc having a combustion loss of 7% by weight or less, containing no particles having a diameter of 10 µm or more and having an average particle diameter D₅₀ of 1.0 to 3.0 µm.

    摘要翻译： 一种汽车保险杠用树脂组合物，其特征在于，含有下述成分（A），（B）和（C）：（A）45〜74重量％的结晶乙烯 - 丙烯嵌段共聚物，（a）弯曲弹性模量为15000 kg / cm 2以上，（b）乙烯含量为5〜20重量％，（c）室温下可溶于对二甲苯的部分的特性粘度（萘烷，135℃），或 更多，（d）21〜70g / 10min的熔体流动指数（MI），和（e）不溶于沸腾正庚烷的部分的含量为97重量％以上; （B）21〜35重量％的选自组分（I），（II）和（III）并且重量比为（I）：[（I）+（II）+（III） ）]为0.5〜1.0，（a）所述成分（1）为无定形乙烯 - 丁烯共聚物，其丁烯含量为10〜25重量％，门尼粘度值（ML1 + 4,100℃）为 5〜20，（b）所述成分（II）为乙烯含量为70〜90重量％，门尼粘度值（ML1 + 4,100℃）为5〜40的无定形乙烯 - 丙烯共聚物，和 （c）所述组分（III）是由10至40重量％的芳族乙烯基聚合物嵌段X和60至90重量％的共轭二烯聚合物嵌段Y组成的氢化嵌段共聚物，其具有所述嵌段组分 是X-Y或X - （Y-X）n，其中n是1或2,90摩尔％以上的所述嵌段Y被氢化，氢化嵌段共聚物的熔体流动指数（MI）为5g / 10 分钟。 （230℃，2.16kg）以上; （C）5〜10重量％的燃烧损失为7重量％以下的滑石，不含直径为​​10μm以上且平均粒径D50为1.0〜3.0μm的粒子。