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51. 发明授权

US4363885A Propylene polymer composition useful for bumpers 失效
标题翻译：用于保险杠的丙烯聚合物组合物
公开(公告)号：US4363885A
公开(公告)日：1982-12-14
申请号：US276972
申请日：1981-06-24
申请人： Osamu Fukui , Yoshiro Umemoto , Tsugumi Sanmiya , Yutaka Sano , Kazuyoshi Tanaka
发明人： Osamu Fukui , Yoshiro Umemoto , Tsugumi Sanmiya , Yutaka Sano , Kazuyoshi Tanaka
IPC分类号： C08L23/16 , B29C45/00 , B29K23/00 , B29L31/30 , C08K3/34 , C08L7/00 , C08L21/00 , C08L23/00 , C08L51/00 , C08L51/02 , C08L53/00 , C08L77/00 , C08L101/00
CPC分类号： C08K3/34 , C08L53/00
摘要： A bumper having excellent rigidity, resistance to thermal deformation and to mechanical impact at a low temperature and superior lacquer-bonding property is made from a propylene polymer composition comprising:(A) 55 to 65% by weight of at least one crystalline ethylene-propylene block copolymer in which the content of the polymerized ethylene is in the range of from 5 to 10% by weight, in which the polypropylene component has a fraction thereof insoluble in boiling n-heptane, in an amount of 97% or more, in which a fraction thereof soluble in p-xylene at room temperature, has an intrinsic viscosity of from 3 to 4 determined in decahydronaphthalene at a temperature of 135.degree. C. and which has a melt flow index of from 2 to 10;(B) 30 to 35% by weight of at least one amorphous ethylene-propylene copolymer having an intrinsic viscosity of from 2.0 to 3.5 determined in decahydronaphthalene at a temperature of 135.degree. C., and a Mooney viscosity ML.sub.1+4 of from 40 to 100 determined at a temperature of 100.degree. C., and;(C) 5 to 15% by weight of talc in the form of fine particles having an average size of from 0.5 to 5 microns.
摘要翻译：具有优异刚性，耐热变形性和在低温下机械冲击和优异的漆粘合性能的保险杠由丙烯聚合物组合物制成，该组合物包含：（A）55至65重量％的至少一种结晶乙烯 - 丙烯嵌段共聚物，其中聚合乙烯的含量为其中聚丙烯组分具有不溶于沸腾正庚烷的分数的5至10重量％，其量为97％或更高，其中在室温下可溶于对二甲苯的馏分在135℃温度下在十氢化萘中的特性粘度为3〜4，熔体流动指数为2〜10; （B）30〜35重量％的至少一种在十氢萘中在135℃下测定的特性粘度为2.0〜3.5的非晶质乙烯 - 丙烯共聚物，门尼粘度ML1 + 4为40〜 100在100℃的温度下测定，（C）5至15重量％的平均粒度为0.5至5微米的细颗粒形式的滑石。

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