Magnesium dichloride-alcohol adducts and catalyst components obtained therefrom

摘要

The present invention relates to MgCl₂.(EtOH),_m(ROH)_n(H₂0)_p adduct in which R is a C1-C15 hydrocarbon group different from ethyl, n and m are indexes, higher than 0, satisfying the equations (n+m)>=0.7 and 0.05<=n/(n+m)<=0.95 and p is a number ranging from 0 to 0.7 with the proviso that when R is methyl and (n+m) is in the range of 0.7 to 1, the value of n/(n+m) ranges from 0.05 to 0.45. The catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity with respect to the catalysts prepared from the adducts of the prior art.