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    • 26. 发明授权
    • Polymerization process
    • 聚合过程
    • US08754177B2
    • 2014-06-17
    • US12637349
    • 2009-12-14
    • Donna J. CrowtherJohn F. Szul
    • Donna J. CrowtherJohn F. Szul
    • C08F4/653C08F4/642C08F4/6592C08F210/02
    • C08F10/00C08F4/65912C08F4/65927C08F210/16Y10S526/943C08F4/65904C08F210/08C08F2500/12
    • The invention relates to a polymerization process, the polymerization process includes contacting a cyclic bridged metallocene catalyst represented by the following formula: LA(A)LBMQn wherein A is a divalent group bound to each of LA and LB; each of LA and LB are bound to M, and each Q is bound to M; LA and LB are independently selected from the group consisting of cyclopentadienyl ligands and substituted cyclopentadienyl ligands; A is a divalent bridging group comprising a heterocyclic ring comprising from 3 to 6 carbon atoms and one silyl, thus forming a 4 to 7 member divalent ring; M is a Group 4, 5, or 6 transition metal; Q is independently a halogen, a hydride, or a hydrocarbyl radical having from 1 to 20 carbon atoms; wherein n is 1 or 2; with an activator, and optionally a support, to form an activated catalyst and, subsequently, contacting the activated catalyst with ethylene and optionally, at least one C3-C8 alpha olefin comonomer.
    • 本发明涉及聚合方法,聚合方法包括使由下式表示的环状桥连金属茂催化剂:LA(A)LBMQn,其中A是与LA和LB各自结合的二价基团; LA和LB各自与M结合,每个Q与M相连; LA和LB独立地选自环戊二烯基配体和取代的环戊二烯基配体; A是包含含有3至6个碳原子的杂环和1个甲硅烷基的二价桥连基,从而形成4至7元的二价环; M是第4,5或6族过渡金属; Q独立地为卤素,氢化物或具有1至20个碳原子的烃基; 其中n为1或2; 与活化剂和任选的载体形成活化的催化剂,随后使活化的催化剂与乙烯和任选的至少一种C 3 -C 8α-烯烃共聚单体接触。