Patent ID: 6395670
Filing Date: 2002-05-28
Classification: C08F

Abstract:
In a catalyst component for the polymerization of olefins CH2&boxH;CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Mg, Ti, and halogen, the improvement comprising:in the catalyst component, the presence of at least two internal electron donor compounds, a first internal electron donor compound selected from the group consisting of ethers containing two or more ether groups, wherein said ethers are further characterized by the formation of complexes with anhydrous magnesium dichloride in an amount less than 60 mmoles per 100 g of MgCl2 and by the failure of entering into substitution reactions with TiCl4 or by reacting in that way for less than 50% by moles, and a second internal electron donor compound selected from the group consisting of esters of mono and polycarboxylic acids.