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US 4,364,852 AGranted
Polyolefin catalysts containing heterocyclic carboxylic acid esters
AssigneeNorthern Petrochemical Company
InventorRolf F. Foerster
Life of this patent
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Abstract
A catalyst system for the preparation of homopolymers and copolymers of alpha monoolefins comprising (1) a titanium halide of the formula TiCl.sub.3.m AlCl.sub.3 where m is a number from 0 to 0.5, (2) an ester of a carboxylic acid having an oxygen, nitrogen, or sulfur-containing heterocyclic structure, and (3) an appropriate conventional aluminum alkyl.
Claims3
A catalyst system for the preparation of homopolymers and copolymers of alpha monoolefins comprising
- (1) a titanium halide of the formula
- TiCl.sub.3.m AlCl.sub.3
- where M is a number from 0 to 0.5,
- (2) an ester of a carboxylic acid having an oxygen, nitrogen, or sulfur-containing heterocyclic structure, wherein the ester group is attached to a carbon atom in the heterocyclic structure, and
- (3) an aluminum-alkyl of the formula ##STR4## where X and Y are each alkyl of not more than 8 carbon atoms, and Z is chlorine or alkyl of not more than 8 carbon atoms, with the proviso that (I) the molar ratio of ester (2):
- titanium halide (1) is from about 0.005 to about 5, and (II) the molar ratio of titanium halide (1):
- aluminum-alkyl (3) is from 1:1 to 1:20.
4 more elements
Dependencies are inferred from the claim text.