Patent ID: 6323293
Filing Date: 2001-11-27
Classification: C08F

Abstract:
Process of polymerizing monomer having at least one Ziegler-Natta polymerizable bond, comprising contacting monomer with, reacting monomer in presence of, or combinations thereof, catalyst system comprising:A) catalyst component consisting essentially ofi) about 1.5 weight % to about 6 weight % titanium,ii) about 10 weight % to about 20 weight % magnesium,iii) about 40 weight % to about 70 weight % halogen,iv) about 5 weight % to about 25 weight % polycarboxylic ester selected from the group consisting of esters of aliphatic, aromatic, or alicyclic polycarboxylic acids, andv) about 0.1 weight percent to about 2.5 weight % organic phosphorous compound selected from the group consisting of hydrocarbon esters of phosphoric acid such that each hydrocarbon group has one to about six carbon atoms;B) electron donor described by the formula: ##STR4##wherein R.sub.1 is cycloakyl group containing about 6 to about 12 carbon atoms and having at least one secondary or tertiary carbon atom, R.sub.2 and R.sub.3 are each independently alkyl or aryl group, and R.sub.4 is an alkyl group having a primary carbon bonded to the silicon atom; andC) organic aluminum compound.