Patent ID: 6048818
Filing Date: 2000-04-11
Classification: C08F

Abstract:
A solid catalyst component for the polymerization of olefins CH.sub.2 .dbd.CHR in which R is hydrogen of a hydrocarbyl radical with 1-12 carbon atoms, comprising a titanium compound, having at least a Ti-halogen bond and an electron donor compound supported on a Mg halide, in which said electron donor compound is selected from esters of malonic acids of formula (I): ##STR6## wherein R.sub.1 is a C.sub.5 -C.sub.20 linear or branched alkyl, a C.sub.5 -C.sub.20 cycloalkyl, a C.sub.7 -C.sub.20 arylalkyl or a C.sub.7 -C.sub.20 alkylaryl group, R.sub.2 and R.sub.3, the same as or different from each other, are C.sub.1 -C.sub.3 alkyl, or cyclopropyl.