Basell Poliolefine Italia S.r.l.

Basell Poliolefine Italia, S.p.a.

Remco Kelder

Giampiero Morini

Giulio Balbontin

Yuri Gulevich

Yuri V Gulevich

Peter Aa Klusener

Henricus P B Duijghuisen

Jan Dirk Van Loon

Franciscus M Korndorffer

The present invention relates to a solid catalyst component for the polymerization of olefins CH&#x2550;CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and an electron donor selected from y-butyrolactone derivatives of a particular formula. Said catalyst components, when used in the polymerization of olefins and in particular of propylene, are capable to give polymers in high yields and with high isotactic index expressed in terms of high xylene insolubility.

Components and catalysts for the polymerization of olefins

The present invention relates to a solid catalyst component for the polymerization of olefins CH &boxH;CHR in which R is hydrogen or a hydrocarbon radical with 1-12 carbon atoms, comprising Mg, Ti, halogen and an electron donor selected from substituted succinates of a particular formula. Said catalyst components when used in the polymerization of olefins, and in particular of propylene, are capable to give polymers in high yields and with high isotactic index expressed in terms of high xylene insolubility.

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Hoevelaken, Netherlands

Remco Kelder