| abstract |
The solid catalyst component for olefin polymerization comprises Mg, Ti and an electron donor of formula (I) wherein each Q is a group -COOR 1 , wherein R 1 is selected from C 1 -C 15 hydrocarbon groups, optionally containing heteroatoms selected from halogen, P, S, N and O; or the group -CON(R 2 ) 2 , wherein R 2 groups that are the same or different from each other are hydrogen or R 1 groups that may be fused together to form one or more rings; and A is a divalent bridging group, provided that the Q groups cannot simultaneously is the group -COOR 1 or CON(R 2 ) 2 . |