Propylene polymers incorporating macromers
    3.
    发明授权
    Propylene polymers incorporating macromers 失效
    掺入大分子单体的丙烯聚合物

    公开(公告)号:US06197910B1

    公开(公告)日:2001-03-06

    申请号:US09020306

    申请日:1998-02-06

    IPC分类号: C08F11006

    摘要: A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, repeating units of one or more comonomers, wherein the total comonomer repeating unit content of the polyolefin composition is from 0 to 20 mole percent, and further, wherein the weight average branching index g′ for the lower molecular weight region of the polyolefin composition is less than 0.93. Additionally, a process is provided for producing a polyolefin composition comprising: a) contacting, in solution, at a temperature from about 90° C. to about 120° C., propylene monomers with a catalyst composition comprising a first chiral, stereorigid transition metal catalyst compound capable of producing isotactic polypropylene; b) copolymerizing the product of a) with propylene and, optionally, one or more copolymerizable monomers, in a polymerization reactor under suitable polypropylene polymerization conditions using a second chiral, stereorigid transition metal catalyst capable of producing isotactic polypropylene; and c) recovering a branched olefin polymer.

    摘要翻译: 提供了聚烯烃组合物,其基本上由全同立构聚丙烯和任选的一种或多种共聚单体的重复单元组成,其中聚烯烃组合物的总共聚单体重复单元含量为0至20摩尔%,此外,其中重均分子量 聚烯烃组合物的较低分子量区域的指数g'小于0.93。 此外,提供了一种用于制备聚烯烃组合物的方法,其包括:a)在约90℃至约120℃的温度下在溶液中使丙烯单体与催化剂组合物接触,所述催化剂组合物包含第一手性立体刚性过渡金属 能够产生全同立构聚丙烯的催化剂化合物; b)在合适的聚丙烯聚合条件下,使用能够产生全同立构的第二手性立体刚性过渡金属催化剂,在聚合反应器中将a)的产物与丙烯和任选的一种或多种可共聚的单体共聚 聚丙烯; 和c)回收支链烯烃聚合物。