Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1980-10-20
1982-10-26
Garvin, Patrick
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252429C, 252431R, 252431N, 252431P, 526114, C08F 464
Patent
active
043561110
ABSTRACT:
Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting trivalent or tetravalent titanium compounds such as titanium trichloride or titanium tetraalkoxide, zirconium compounds such as tri-n-butoxy zirconium chloride, an organomagnesium component such as di-n-hexyl magnesium, a halogen source such as ethyl aluminum dichloride and an organoaluminum compound if the halide source or magnesium component does not contain sufficient quantities of aluminum. Polymerization processes employing this catalyst composition do not require conventional catalyst removal steps in order to provide polymers having suitable color and other physical characteristics and these catalysts produce polymers having broader molecular weight distributions and, at higher zirconium amounts, lower melt indices than do corresponding catalysts without the zirconium compound.
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Lowery, Jr. Kirby
Shipley Randall S.
Carter J. G.
Garvin Patrick
The Dow Chemical Company
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