Transition metal catalyst, method of producing the catalyst, pol

Details Transition metal catalyst, method of producing the catalyst, pol Transition metal catalyst, method of producing the catalyst, pol

1992-06-30

1993-11-02

Smith, Edward J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502125, 526125, 526352, C08F 4651, C08F 1002

Patent

active

052583449

ABSTRACT:
A polymerization catalyst is formed by contacting an alcohol with a transition metal compound. In a second embodiment, a solution is formed by contacting a Group IIA or Group IIB metal halide and an alcohol, the solution is then contacted with a transition metal compound to produce a catalyst. Either catalyst can be combined with an organometallic cocatalyst. Polymers with multimodal molecular weight distribution are produced when a diol is used to prepare the catalyst and an organoaluminum halide is used as cocatalyst. Polymers with broad molecular weight distribution of the unimodal type are produced when using a trialkylaluminum cocatalyst.

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"Modification of Catalysts for Propylene Polymerization: Alcohols and Lewis Bases"-A. J. Sivak and Y. V. Kissin, 22 J. Polym. Sci. Polym. Chem. Ed. 3739-3746 (1984).

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