Patent ID: 6699814
Filing Date: 2004-03-02
Classification: C07C,C08F

Abstract:
A catalyst for the polymerization of olefins CH2&boxH;CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising the product of the reaction between:(a) a solid catalyst component comprising Mg, Ti, halogen and at least an heteroatom containing malonate of formula (I): wherein R1 and R2, equal to or different from each other, are H or a C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group and said R1 and R2 can also be joined to form a cyclic group: R3 and R4 are independently selected from C1-C20 linear or branched alkyl, alkenyl, cycloalkyl, aryl, arylalkyl or alkylaryl group and R3 and R4 can also be joined to form a cyclic group; with the proviso that at least one of the R1 to R4 groups contains at least one heteroatom selected from the group consisting of halogens, N, O, Si, Ge, P, and S, and that when R3 and R4 are C2 alkyls, R1 or R2 do not contain O;(b) an alkylaluminum compound and, optionally, (c) one or more electron-donor compounds (external donor).