Ronald J Gibbs

US Patent:

44966601, Jan 29, 1985

Filed:

Oct 1, 1980

Appl. No.:

6/192959

Inventors:

Donald E. Gessell - Baton Rouge LA
Ronald L. Gibbs - Midland MI
Ricardo Fuentes - Baton Rouge LA

Assignee:

The Dow Chemical Company - Midland MI

International Classification:

C08F 402

US Classification:

502111

Abstract:

A catalyst for polymerizing olefins is the reaction product of (A) the reaction product of (1) the reaction product of (a) an alkyl magnesium compound such as dibutylmagnesium, with (b) an oxygen-containing and/or nitrogen-containing compound such as n-propyl alcohol, or isopropylamine, with (2) a halide source such as titanium tetrachloride or silicon tetrachloride; and (B) a transition metal compound such as titanium tetrachloride and (C) a reducing agent such as triisobutylaluminum. Also disclosed is a non-transition metal containing catalyst support for use in preparing olefin polymerization catalysts. The polymers which are produced in the presence of this catalyst and a cocatalyst such as triethylaluminum have a low catalyst support to transition metal ratio and therefore, the catalyst efficiency based on quantity of polymer per quantity of total catalyst is very high resulting in a polymer having good color and very little, if any, corrosion.