公开(公告)号：US5854355A

公开(公告)日：1998-12-29

申请号：US929052

申请日：1997-09-15

申请人： Takahiro Oka ,  Shunji Kawazoe ,  Yasuhiro Yamane

发明人： Takahiro Oka ,  Shunji Kawazoe ,  Yasuhiro Yamane

IPC分类号： C08F4/658 ,  C08F4/60 ,  C08F297/08

CPC分类号： C08F297/08 ,  C08F297/083

摘要： A continuous process for preparation of propylene-ethylene block copolymer suitable for moldings with high rigidity and high impact resistance are provided, which process is a continuous process for preparation of highly rigid propylene-ethylene block copolymers, wherein propylene and ethylene are polymerized in the specified 2 steps with use of a catalyst system comprising (A) a solid catalyst component containing Ti, Mg, halogen and polyvalent carboxylic ester, (B) an organic aluminium compound, as well as (C) an organic silicon compound expressed by the general formula R.sup.4.sub.x R.sup.5.sub.y Si(OR.sup.6).sub.z (wherein, x+y+z=4), and wherein the ratio between the maximum value and the minimum value of MFR(l)) is 0.1.ltoreq.Log(MFR(h)/MFR(l)).ltoreq.1, and the ratio between the average MFR(i) and MFR(ii) in the subsequent polymerization procedure (II) containing ethylene in a relatively large amount which is carried out by adding the glycol type compound is 3.ltoreq.Log(MFR(i)/MFR(ii)).ltoreq.7. The product having less fish eye and high impact resistant value was obtained from the copolymer according to the invention.

摘要翻译： 提供了适用于具有高刚性和高抗冲击性的模制品的丙烯 - 乙烯嵌段共聚物的连续制备方法，该方法是用于制备高刚性丙烯 - 乙烯嵌段共聚物的连续方法，其中丙烯和乙烯在指定的 使用包含（A）含有Ti，Mg，卤素和多价羧酸酯的固体催化剂组分的催化剂体系的步骤（B）有机铝化合物，以及（C）由通式 R4xR5ySi（OR6）z（其中，x + y + z = 4），其中MFR（1）的最大值和最小值之间的比率为0.1 Log（MFR（h）/ MFR ））），并且通过加入二醇型化合物进行的含有相对较多量的乙烯的随后的聚合方法（II）中的平均MFR（i）和MFR（ii）之间的比例为3 < / =对数（MFR（i）/ MFR（ii））7。 由本发明的共聚物得到鱼眼少，抗冲击性高的产品。