| 摘要 |
A catalyst component for the polymerization of olefins comprising Mg, Ti and Cl obtained by a process comprising the following steps: a) reacting a precursor of formula MgCl2.mEtOH, wherein m≰1.5 having a porosity due to pores with radius up to 1μof higher than 0.4 cm3/g with an alcohol of formula RIOH where RI is an alkyl different from ethyl, a cycloalkyl or aryl radical having 3-20 carbon atoms said RIOH being reacted with the said precursor using molar ratio RIOH/Mg ranging from 0.01 to 10; and b) reacting the product obtained in (a) with TiCl4 using Ti/Mg molar ratio ranging from 0.01 to 15. |
