Catalyst systems for polymerizations at high temperatures

Details Catalyst systems for polymerizations at high temperatures Catalyst systems for polymerizations at high temperatures

1982-12-29

1987-07-21

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502134, 526155, 526156, 5263482, 526904, C08F 464, C08F21002

Patent

active

046819240

ABSTRACT:
Copolymerization of ethylene and a C.sub.3 -C.sub.20 alpha-monoolefin at high temperature gives a low density polyethylene having a density of between 0.91 and 0.93 g/cc. The copolymerizations are accomplished with a catalyst made by co-comminuting an anhydrous magnesium halide, an anhydrous aluminum halide, a titanium compound, and at least one electron donor, and a cocatalyst comprising a synergistic mixture of an alkyl aluminum chloride and an oxygen-containing aluminum compound having oxygen attached to at least one aluminum valence.

REFERENCES:
patent: 3010787 (1961-11-01), Tornqvist
patent: 4130503 (1978-12-01), Fodor
patent: 4146502 (1979-03-01), Yokoyama et al.
patent: 4149990 (1979-04-01), Giannini et al.
patent: 4347158 (1982-08-01), Kaus et al.
patent: 4349648 (1982-09-01), Jorgensen et al.
patent: 4354010 (1982-10-01), Newton

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