Patent ID: 7323431

Claim:
A catalyst for olefin polymerization, comprising a product of the following components: (A) solid titanium-containing catalyst component comprising magnesium, titanium and halogen as essential components; (B) organo-aluminum compound catalyst component, and (C) silicon ether compound catalyst component, the silicon ether compound being represented by a general formula (I): wherein R 1 -R 12 groups, which are identical to or different from each other, represent hydrogen, halogen, C 1 -C 20 linear or branched alkyl, C 3 -C 20 cycloalkyl, C 6 -C 20 aryl, C 7 -C 20 alkaryl or C 7 -C 20 aralkyl, and two or more of R 1 -R 10 groups can be linked to form saturated or unsaturated ring structure(s), which is/are optionally substituted by a group having the same meanings as that of the R 1 -R 12 groups, and wherein the R 11 and R 12 groups are not linked together to form a ring structure, or are linked together to form a saturated ring structure; the R 1 -R 12 groups optionally contain one or more hetero-atoms selected from the group consisting of nitrogen, oxygen, sulfur, silicon, phosphorus and halogen atom for replacing carbon atom(s), hydrogen atom(s) or the both; and A represents a carbon atom or silicon atom.