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    • 10. 发明授权
    • Propylene polymers incorporating macromers
    • 掺入大分子单体的丙烯聚合物
    • US06342574B1
    • 2002-01-29
    • US09665893
    • 2001-03-26
    • Weiqing WengArmenag Hagop DekmezianEric John MarkelDavid L. Peters
    • Weiqing WengArmenag Hagop DekmezianEric John MarkelDavid L. Peters
    • C08F11006
    • C08L51/06C08F4/65912C08F10/00C08F10/06C08F110/06C08F255/00C08F255/02C08F290/042C08F297/08C08F297/083Y10S526/943C08F4/65927C08F2500/15C08F2500/03C08F2500/06C08F2500/09
    • A polyolefin composition is provided which consists essentially of isotactic polypropylene and, optionally, one or more comonomers, wherein the total comonomer 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.
    • 提供了聚烯烃组合物,其基本上由等规聚丙烯和任选的一种或多种共聚单体组成,其中聚烯烃组合物的总共聚单体含量为0至20摩尔%,此外,其中重均分支指数g'为 聚烯烃组合物的较低分子量区域小于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。