C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
252/105, 402/642
C08F 4/16 (2006.01) C08F 10/00 (2006.01)
Patent
CA 1188289
ABSTRACT OF THE DISCLOSURE A titanium trichloride catalyst component con- taining a minor amount of prepolymerized ethylene and use- ful in the polymerization of alpha-olefins is produced by reducing titanium tetrachloride with an organoaluminum com- pound at low temperatures and then treating the resulting reduced solids product with about 1 to 1,000 wt.% ethylene so as to obtain a prepolymerized titanium trichloride re- duced solid. The prepolymerized reduced solid can there- after be activated to a highly active prepolymerized ti- tanium trichloride by treating the prepolymerized reduced solid with a halogenated hydrocarbon and a Lewis base com- plexing agent or titanium tetrachloride and a Lewis base complexing agent. The prepolymerized reduced solid and the prepolymerized activated titanium trichloride manifests substantially no evidence of friability upon being subjected to mechanical shearing forces. The resulting prepolymerized activated titanium trichloride composition, when employed in combination with an organo-metal compound results in an un- expectedly highly active catalyst obtaining polymers with high heptane insolubles.
402891
Russell Kathryn A.
White Richard P.
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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