Ethylene polymerization catalyst.

摘要

1. A catalyst system comprising: (i) the reaction product of a vanadium compound and an electron donor, which is a liquid, organic Lewis base in which the vanadium compound is soluble; (ii) an alkylhalosilane having the following formula: R @-Si-Xb wherein R is an alkyl having 1 to 10 carbon atoms; X is chlorine, bromine, or iodine, and each X is alike or different; a is 1 or 2; b is 2 or 3; and a + b = 4. (iii) a silica support into which components (i) and (ii) are impregnated; and (iv) a hydrocarbyl aluminum cocatalyst. u