Propylene polymers

Abstract

The present invention relates to a solid catalyst component for the polymerization of olefins CH 2 ═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.

1 - 38 . (canceled).  
     
     
         39 . Propylene polymers characterized in that they have a polydispersity index of higher than 5, a content of isotactic units expressed in terms of pentads of higher than 97% and a flexural modulus of at least 2000 MPa.  
     
     
         40 . The propylene polymers according to  claim 39  in which the polydispersity index is higher than 5.1, the flexural modulus is higher than 2100 MPa and the content of isotactic units expressed in terms of pentads is higher than 97.5%.