Patent ID: 6313238
Filing Date: 2001-11-06
Classification: C08F

Abstract:
A process for the (co)polymerization of olefins CH.sub.2.dbd.CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, carried out in the presence of a catalyst comprising the product of the reaction between:(i) a solid catalyst component comprising a titanium compound, having at least one Ti-halogen bond and an electron donor compound supported on an Mg halide, in which the electron donor compound is selected from esters of malonic acids of formula (I): ##STR6##wherein R.sup.1 is a C.sub.5 -C.sub.2 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.sup.2 and R.sup.3, the same as or different from each other are C.sub.1 -C.sub.3 alkyl or cyclopropyl;(ii) an alkylaluminum compound; and(iii) one or more electron-donor compounds (external donor).