Solution polymerization of ethylene
    5.
    发明授权
    Solution polymerization of ethylene 有权
    乙烯溶液聚合

    公开(公告)号:US06221985B1

    公开(公告)日:2001-04-24

    申请号:US09229861

    申请日:1999-01-13

    IPC分类号: C08F444

    摘要: A medium pressure process for the solution polymerization of ethylene at a temperature of from 80° C. to 250° C. in the presence of a catalyst system comprising (1) a catalyst component which is a group 4 metal complex having a delocalized, cyclic, pi-bonded ligand, a (defined, specific) heteroligand and one or two activatable ligands; and (2) an ionic activator which does not contain an active proton. The catalyst component is unbridged and easily synthesized. It is highly active in solution polymerization when properly activated (but is not active when used in combination with an alumoxane). Preferred catalyst systems contain an unbridged monocyclopentadienyl titanium (IV) complex and triphenylcarbenium tetrakis (pentafluorophenyl) borate.

    摘要翻译: 在催化剂体系的存在下,在80℃至250℃的温度下乙烯的溶液聚合的中压方法,包括(1)催化剂组分,其是具有离域的环状的第4族金属络合物 ,π键合配体,(限定的,特异性的)杂配偶体和一个或两个可激活的配体; 和(2)不含活性质子的离子活化剂。 催化剂组分是未桥接的并且易于合成。 当溶剂聚合适当地活化时(但与铝氧烷结合使用时,其不具有活性),它是非常活泼的。 优选的催化剂体系包含未桥连的单环戊二烯基钛(IV)络合物和四(五氟苯基)硼酸三苯基碳鎓。