Process for the copolymerization of ethylene

Details Process for the copolymerization of ethylene Process for the copolymerization of ethylene

2003-08-19

2009-11-10

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...

C526S171000, C526S348600, C526S348500, C526S348000, C526S943000, C526S901000, C526S941000, C556S053000

Reexamination Certificate

active

07615597

ABSTRACT:
A process for producing a polymer of ethylene containing from 0.1 to 99% by mol of one or more derived units of alpha-olefins and optionally from 0 to 5% by mol polyene, comprising contacting ethylene, one or more alpha-olefins and optionally said polyene, in the presence of a catalyst system obtainable by contacting:a) a metallocene compound of formula (I):whereinM is zirconium, hafnium or titanium; X, is a hydrogen atom, a halogen atom, or a hydrocarbon group; R1is a hydrocarbon group;R2, R3, R4and R5are hydrogen atoms, or hydrocarbon groups; R6is a hydrocarbon group; L is a divalent bridging group, and T is a divalent radical of formula (II) or (III):whereinR8and R9are hydrogen or hydrocarbon groups; andb) an alumoxane or a compound capable of forming an alkyl metallocene cation.

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