Catalyst system for olefin polymerization

Details Catalyst system for olefin polymerization Catalyst system for olefin polymerization

2004-12-22

2009-08-25

Wu, David (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S161000, C526S154000, C526S169000, C526S169100, C502S103000, C502S132000

Reexamination Certificate

active

07579416

ABSTRACT:
The present invention relates to a catalyst system for olefin polymerization comprising an organic transition metal compound and, as cocatalyst, an ionic compound made up of anions of the formula (Ia),in-line-formulae description="In-line Formulae" end="lead"?[Al(OR1)4]−  (Ia)in-line-formulae description="In-line Formulae" end="tail"?wherethe radicals R1are identical or different and are each, independently of one another, a radical R2R3(CF3)2,R2is a carbon or silicon atom andR3is hydrogen, C1-C20-alkyl, C1-C20-fluoroalkyl, C6-C20-aryl, C6-C20-fluoroaryl, C7-C40-arylalkyl, C7-C40-fluoroarylalkyl, C7-C40-alkylaryl, C7-C40-fluoroalkylaryl or an SiR43group, whereR4may be identical or different and is each C1-C20-alkyl, C1-C20-fluoroalkyl, C6-C20-aryl, C6-C20-fluoroaryl, C7-C40-arylalkyl, C7-C40-fluoroarylalkyl, C7-C40-alkylaryl or C7-C40-fluoroalkylaryl,and Lewis-acid cations or Brönsted acids as cations.In addition, the invention relates to the process for preparing such a catalyst system and to a process for the polymerization of olefins in which this catalyst system is used.

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