| 摘要 |
This invention relates to an olefin polymerization catalyst composition comprising the product of the combination of an activator, an additive and a transition metal compound which is represented by the formula:where M is a metal selected from the group consisting of Groups 3 to 13, lanthanide and actinide metals of the Periodic Table of Elements; Q is bonded to M and each Q is a monovalent, divalent or trivalent anion; X and Y are bonded to M; X and Y are independently selected from the group consisting of nitrogen, oxygen, sulfur and phosphorous; Y is contained in a heterocyclic ring J, where J comprises from 2 to 50 non-hydrogen atoms, Z is bonded to X, where Z comprises 1 to 50 non-hydrogen atoms; t is 0 to 1; when t is 1, A is abridging group joined to at least one of X, Y or J, q is 1 or2; n is the oxidation state of M minus q minus 1 if Q is a monovalent anion, n is (the oxidation state of M-q)/2 if Q is a bivalent anion, or n is (the oxidation state of M-q)/3 if Q is a trivalent anion, optionally a group R'm may be bound to Z and/or a group R''p may be bound to J;the R'' groups are independently selected from the group consisting of hydrogen, linear, branched, and cyclic alkyl, alkenyl, alkynyl, alkoxy, aryl and aryloxy radicals; two or more R'' groups may be joined to form a cyclic moiety; m is an integer from 0 to 5;the R' groups are independently selected from the group consisting of hydrogen, linear, branched, and cyclic alkyl, alkenyl, alkynyl, alkoxy, aryl and aryloxy radicals; two or more R' groups may be joined to form a cyclic moiety; p is an integer from 0 to 5;and wherein the additive is a carbonyl compound.
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