Catalyst composition for copolymerizing ethylene

Details Catalyst composition for copolymerizing ethylene Catalyst composition for copolymerizing ethylene

1981-07-31

1982-09-14

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

252429B, 252429C, 5263486, 526901, C08F 234, C08F 1002

Patent

active

043496482

ABSTRACT:
Ethylene copolymers having improved optical properties in film form are prepared by continuously copolymerizing ethylene with one or more higher alpha olefin monomers in a low pressure gas phase reaction with a catalyst composition prepared by forming a precursor composition from a magnesium compound, titanium compound, and electron donor compound; diluting said precursor composition with an inert carrier material; optionally partially activating the diluted precursor composition with an organo aluminum compound prior to introducing said diluted precursor composition into the polymerization reactor; and completely activating the diluted (and optionally partially activated) precursor composition in the polymerization reactor with a mixture of a dihydrocarbyl aluminum halide compound and a trihydrocarbyl aluminum compound.

REFERENCES:
patent: 4064334 (1977-12-01), Kuroda et al.
patent: 4174429 (1979-11-01), Giannini et al.
patent: 4205021 (1980-05-01), Morita et al.
patent: 4234710 (1980-11-01), Moberly et al.

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