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发明授权
US5684099A Propylene block copolymer, process for producing the same, and resin composition comprising the same 失效
丙烯嵌段共聚物，其制造方法和含有它们的树脂组合物

Propylene block copolymer, process for producing the same, and resin composition comprising the same
摘要：
A propylene block copolymer comprising: (a) a propylene homopolymer part having (i) an insoluble amount on xylene extraction at 25.degree. C. of 99.0% by weight or more; (ii) an isotactic pentad fraction of 98.0% or more; (iii) an isotactic average chain length of 500 or more; and (iv) a total amount of fractions having an isotactic average chain length of 800 or more obtained in a column chromatographic separation of 10% by weight or more, and (b) a copolymer part comprising propylene and at least one of ethylene and an .alpha.-olefin having from 4 to 12 carbon atoms, the proportion of the propylene homopolymer part (a) being from 50 to 97% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b), and the proportion of the copolymer part (b) being from 3 to 50% by weight based on the total amount of the propylene homopolymer part (a) and the copolymer part (b).
摘要（中）：

丙烯嵌段共聚物，其包含：（a）丙烯均聚物部分，其具有（i）在25℃下二甲苯萃取的不溶量为99.0重量％以上; （ii）全同立构五单元组分数为98.0％以上; （iii）全同立构平均链长为500以上; 和（iv）在柱色谱分离中获得的全同立构平均链长为800以上的馏分的总量为10重量％以上，（b）包含丙烯与乙烯和 基于丙烯均聚物部分（a）和共聚物部分（b）的总量，丙烯均聚物部分（a）的比例为50至97重量％，具有4至12个碳原子的α-烯烃， 共聚物部分（b）的比例相对于丙烯均聚物部分（a）和共聚物部分（b）的总量为3〜50重量％。

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