Patent ID: 7388061

Claim:
A solid catalyst component for polymerization of olefins, comprising magnesium, titanium, a halogen and an electron donor, wherein said electron donor comprises at least one ester of polyol having the formula (I): R 1 CO—O—CR 3 R 4 -A-CR 5 R 6 —O—CO—R 2 (I) wherein the R 1 and R 2 , which are identical or different, are substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms; the R 3 -R 6 , which are identical or different, are selected from the group consisting of hydrogen, halogen, or substituted or unsubstituted hydrocarbyl having 1 to 20 carbon atoms; the R 1 -R 6 optionally contain one or more hetero-atoms replacing carbon, hydrogen atom or the both, said hetero-atom being selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus, fluorine, chlorine, bromine, and iodine; two or more of R 3 -R 6 are optionally linked to form a saturated or unsaturated monocyclic or polycyclic ring; A is a a bivalent linking group with a chain length of 1-10 atoms, wherein said bivalent linking group is selected from the group consisting of aliphatic, alicyclic and aromatic bivalent linking groups, wherein A optionally has C 1 -C 20 linear or branched substituents; one or more of hydrogen atoms on the bivalent linking group as well as one or more of carbon atoms and/or hydrogen atoms on the substituents can be replaced by a hetero-atom selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus, fluorine, chlorine, bromine, and iodine and two or more of said substituents on the linking group as well as said R 3 -R 6 can be linked to form a saturated or unsaturated monocyclic or polycyclic ring.