Metal halide catalyst, method of producing the catalyst, polymer

Details Metal halide catalyst, method of producing the catalyst, polymer Metal halide catalyst, method of producing the catalyst, polymer

1991-12-18

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...

502102, 502113, 502125, 526114, 5263485, C08F 4646, C08F 1002

Patent

active

052583430

ABSTRACT:
A polymerization catalyst system is formed by producing a solution of a halide of scandium, yttrium, or a rare earth metal and an alcohol; contacting the solution with a halide ion exchanging source to form a solid. The catalyst thus produced 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 compound or an alkyl aluminum hydride.

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"Study on the NdCl.sub.3 --supported Ziegler-Natta Catalyst for Olefin Polymerization" Xiao et al., Makromol. Chem. 192, 1059-65 (1991).

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