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    • 2. 发明授权
    • Propylene-ethylene copolymer composition and process for producing the
same
    • 丙烯 - 乙烯共聚物组合物及其制备方法
    • US6005034A
    • 1999-12-21
    • US817850
    • 1997-04-30
    • Teruaki HayashidaShinei GimaKouichi HatadaOsamu KojimaKen ShimizuHirokazu NakajimaTakao NomuraYoshihiro KanomeTakeyoshi Nishio
    • Teruaki HayashidaShinei GimaKouichi HatadaOsamu KojimaKen ShimizuHirokazu NakajimaTakao NomuraYoshihiro KanomeTakeyoshi Nishio
    • C08F4/60C08F4/64C08F4/658C08F210/16C08F297/08C08L23/12C08F10/06C08F210/06
    • C08F297/083C08F210/16
    • A propylene-ethylene copolymer composition is obtained which has good moldability and an excellent balance of rigidity, toughness, and impact-strength. The composition has a melt flow rate of 10 to 300 g/10 minutes and is obtained by producing 60 to 95% by weight, based on the weight of whole polymer, of a propylene polymer having a melt flow rate (ASTM D1238) in the range of 100 to 1,000 g/10 minutes and having a ratio (Cf) of integrated values of the propylene polymer dissolved in o-dichlorobenzene at a temperature of lower than 112.degree. C., and a temperature of 112.degree. C. or higher, respectively, of 0.5 or less, by carrying out polymerization of propylene in the presence of a highly stereoregular catalyst and hydrogen in a polymerization step (I), and then producing 5 to 40% by weight, based on the weight of whole polymer, of an ethylene-propylene copolymer by feeding ethylene and propylene to the propylene polymer to react so that the content of ethylene becomes 30 to 80% by weight. Also provided is a propylene-ethylene copolymer composition comprising the composition mentioned above and a .alpha.-crystal and/or .beta.-crystal nucleator added therewith.
    • PCT No.PCT / JP96 / 02449 Sec。 371日期1997年04月30日 102(e)1997年4月30日PCT PCT 1996年8月30日PCT公布。 公开号WO97 / 08218 PCT 日期1997年3月6日获得了具有良好的成型性和刚性,韧性和冲击强度优异平衡的丙烯 - 乙烯共聚物组合物。 该组合物的熔体流动速率为10-300g / 10分钟,并且通过以全聚合物的重量计60至95重量%的丙烯聚合物的熔体流动速率(ASTM D1238)在 范围为100〜1000g / 10分钟,并且在低于112℃的温度和112℃或更高的温度下,溶解在邻二氯苯中的丙烯聚合物的积分值的比率(Cf) 分别为0.5以下,通过在聚合工序(I)中,在高度立体规则的催化剂和氢的存在下进行丙烯的聚合,然后以全聚合物的重量为基准计5〜40重量% 通过将乙烯和丙烯进料至丙烯聚合物进行反应以使乙烯含量为30至80重量%的乙烯 - 丙烯共聚物。 还提供了包含上述组合物和加入其中的α-结晶和/或β-晶核成核剂的丙烯 - 乙烯共聚物组合物。