Process for polymerizing 1-butene

Details Process for polymerizing 1-butene Process for polymerizing 1-butene

2008-01-07

2009-08-25

Lu, Caixia (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S161000, C526S165000, C526S943000

Reexamination Certificate

active

07579423

ABSTRACT:
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH2═CHT wherein T is a C3-C10, alkyl group, in the presence of a catalyst system obtainable by contacting a metallocene compound of formula (I) Wherein M is an atom of a transition metal; X, is a hydrogen atom, a halogen atoms or a hydrocarbon group; R1, R2, R5, R6, R7, R8and R9are hydrogen atoms or hydrocarbon groups; with the proviso that at least one of R6or R7is a C1-C20alkyl group; R3and R4are C1-C20alkyl groups; and an alumoxane and/or a compound capable of forming an alkyl metallocene cation.

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