Carbocationic catalyst and process for its use

Details Carbocationic catalyst and process for its use Carbocationic catalyst and process for its use

1993-09-28

1995-04-04

Sneed, Helen M. S.

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

Catalyst or precursor therefor

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

502103, 502123, 502124, 502125, 502127, 502128, 502152, 502154, B01J 3100

Patent

active

054038030

ABSTRACT:
In accordance with this invention, there is provided a living carbocationic polymerization catalyst system comprising: (1) a halide of titanium, tin, vanadium or antimony; (2) an aluminum halide selected from the group consisting of aralkyl aluminum halides and alkyl aluminum halides; and (3) an initiator selected from the group consisting of tertiary alkyl halides, tertiary aralkyl halides, tertiary polymeric halides, and water provided that if the initiator is organic, a proton scavenger is present, or, alternatively, if the initiator consists of water, a secondary or tertiary amine is present. Another aspect of the invention comprises a process for using this catalyst system for the polymerization of olefins and for producing narrow molecular weight distribution polymers in a short reaction time.

REFERENCES:
patent: 4929683 (1990-05-01), Kennedy et al.
patent: 4946899 (1990-08-01), Kennedy et al.
patent: 5276094 (1994-01-01), Kaszas et al.

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