Supported polyolefin catalyst for the (co-)polymerization of eth

Details Supported polyolefin catalyst for the (co-)polymerization of eth Supported polyolefin catalyst for the (co-)polymerization of eth

1992-03-06

1992-11-24

Garvin, Patrick P.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526129, 526116, 502108, C08H 464

Patent

active

051662817

ABSTRACT:
The present invention relates to a catalyst and a process for preparing a catalyst suitable for polymerization of olefins. The process is carried out in a hydrocarbon liquid medium and comprises successively contacting a refractory oxide support with (a) a dialkylmagnesium optionally with a trialkylaluminium, (b) a particular monochloro organic compound, (c) a titanium and/or vanadium compound(s), and then (d) with ethylene optionally mixed with a C.sub.3 -C.sub.8 alpha-olefin in the presence of an organo-aluminium or organozinc compound to form a prepolymerised catalyst. The catalyst has a high activity, particularly in a gas phase polymerization of ethylene, and has a great ability of copolymerizing alpha-olefins with ethylene.

REFERENCES:
patent: 4508843 (1985-04-01), Etherton et al.
patent: 4942148 (1990-07-01), Furuhashi et al.

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