Patent ID: 6051524
Filing Date: 2000-04-18
Classification: C08F

Abstract:
A solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing, supported catalyst component useful for stereoregular polymerization or copolymerization of alpha-olefins which contains from about 0.001 to about 0.6 mole per gram atom of titanium and a first internal electron donor comprising: ##STR11## wherein R is selected from C.sub.1 -C.sub.8 alkyl, C.sub.6 -C.sub.9 aryl or C.sub.1 -C.sub.8 alkoxy groups; and wherein X and Y are N-R', O, P(O)(OR'), P(O)R', or S, and R' is selected from hydrogen, C.sub.1 -C.sub.8 alkyl and alkoxy, and C.sub.6 -C.sub.9 aryl groups, provided that up to two Y groups may be CR'.sub.2 groups.