Polymerization process employing transition metal catalyst and p

Details Polymerization process employing transition metal catalyst and p Polymerization process employing transition metal catalyst and p

1993-05-06

1994-02-15

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526352, C08F 4654, C08F 1000

Patent

active

052868192

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. Polymer Sci. Polymer Chem. Ed. 3739-46 (1984).

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