A catalyst component for olefin (co)polymerization, and in particular for
the preparation of LLDPE, comprising Mg, Ti, halogen and an electron
donor compound (ED) belonging to ethers, esters, amines, ketones, or
nitriles, characterized in that the molar ratio Mg/Ti is higher than 5,
and the molar ratio ED/Ti is higher than 3.5. The said catalyst
components display a homogeneous distribution of the comonomer in and
among the copolymer chains.