Polymerization catalysts

Details Polymerization catalysts Polymerization catalysts

1979-07-06

1981-06-30

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526139, 526124, C08F 464

Patent

active

042761921

ABSTRACT:
Polymerization catalyst preparation comprising milling magnesium metal, an organic halide and titanium tetrahalide in the presence of a triaryl phosphite and an aluminum trihalide but in the absence of a complexing diluent. The titanium catalyst component is activated with an organoaluminum activator producing a catalyst for olefin polymerization. In one embodiment, the titanium catalyst component is milled in the presence of magnesium oxide. In another embodiment, the milled titanium catalyst component is subjected to heat treatment.

REFERENCES:
patent: 3094568 (1963-06-01), Hay et al.
patent: 3718635 (1973-02-01), Tomoshige et al.
patent: 4028481 (1977-06-01), Shiomura et al.

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