C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
252/109, 402/645
C08F 4/64 (2006.01) C08F 10/00 (2006.01)
Patent
CA 1154743
ABSTRACT OF THE DISCLOSURE Compositions exhibiting high catalytic activity in the polymerization of .alpha.-olefins, particularly higher olefins, are prepared by reacting (A) tetravalent titanium compounds such as titanium tetraalkoxide, (B) an organoaluminum compound, (C) an organomagnesium component such as a hydrocarbon soluble complex of dialkyl magnesium and an organoaluminum compound such as triethyl aluminum and, (D) as a halide source, a tetravalent tin compound such as tin tetrachloride. 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 provide higher efficiencies than those catalysts employing HCl as the halide source.
360733
Birkelbach Donald F.
Lowery Kirby Jr.
Shipley Randall S.
Smart & Biggar
The Dow Chemical Company
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