公开(公告)号：US6034192A

公开(公告)日：2000-03-07

申请号：US222973

申请日：1998-12-30

Applicant: Donna J. Crowther ,  Natalie A. Merrill ,  Ching-Tai Lue

Inventor： Donna J. Crowther ,  Natalie A. Merrill ,  Ching-Tai Lue

IPC: C08F4/64 ,  C08F4/642 ,  C08F4/659 ,  C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  C07F17/00

CPC classification number: C08F10/00 ,  C08F110/02 ,  C08F210/16 ,  C08F4/65908 ,  C08F4/65912 ,  C08F4/65916 ,  Y10S526/943

Abstract: This invention relates to a process for polymerizing ethylene comprising contacting ethylene and optional comonomers with a catalyst system comprising an activator and a transition metal compound represented by the formula: ##STR1## Wherein R.sub.1 and R2 are independently hydrogen or a group having up to 100 carbon atoms, Cp.sub.1 is a bulky ligand; Cp.sub.2 is a bulky ligand or a heteroatom optionally bound to a C.sub.1 to C.sub.50 hydrocarbyl group, n is the valence state of the transition metal, Tm is a Group 3 to 10 metal, and each X is independently an anionic leaving group.

Abstract translation: 本发明涉及一种聚合乙烯的方法，包括使乙烯和任选的共聚单体与催化剂体系接触，催化剂体系包含活化剂和由下式表示的过渡金属化合物：其中R1和R2独立地是氢或具有至多100个碳原子的基团，Cp1 是体积庞大的配体; Cp2是大体积配体或任选地与C1至C50烃基结合的杂原子，n是过渡金属的价态，Tm是第3至10族金属，并且每个X独立地是阴离子离去基团。