Process for the polymerization of alpha olefins

Details Process for the polymerization of alpha olefins Process for the polymerization of alpha olefins

2011-06-21

2011-06-21

Rabago, Roberto (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S160000, C526S161000, C526S170000, C526S172000, C526S348000, C526S348600, C526S943000

Reexamination Certificate

active

07964679

ABSTRACT:
A process for preparing 1-butene polymers, comprising polymerizing 1-butene or copolymerizing 1-butene with ethylene, propylene or an alpha-olefin of formula CH2═CHT wherein T is a C3-C10alkyl group, in the presence of a catalyst system obtainable by contacting:A) a metallocene compound belonging to formula (I):whereinM is zirconium titanium or hafnium;X, equal to or different from each other, is a hydrogen atom, a halogen atom, a hydrocarbon radical, optionally containing heteroatoms; R4, R5, R6, R7, R8, R9, R10, R11, R12and R13are hydrogen atoms, or C1-C4Ohydrocarbon radicals optionally containing heteroatoms;R1, R2and R3, are linear or branched, C1-C20-alkyl radicals, optionally containing heteroatoms:B) a lumoxane or a compound capable of forming an alkyl metallocene cation; and optionallyC) organo aluminum compound.

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