OLEFIN POLYMERIZATION CATALYST AND PROCESS FOR PRODUCING ETHYLENE COPOLYMERS

摘要

An olefin polymerization catalyst comprising: (A) a solid catalyst component containing a trivalent titanium, which is represented by the composition formula MgmTi(OR)nXp¢ED!q (wherein R is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen, ED is a electron donative compound, and m, n, p and q are each a number satisfying 1 ? m ? 51, 0 < n ? 5, 5 ? p ? 106 and 0.2 ? q ? 2) obtained by reducing a titanium compound represented by the general formula Ti(OR1)aX4-a (wherein R1 is a hydrocarbon group having 1 to 20 carbon atoms, X is a halogen atom and a is a number satisfying 0 ( a ? 4) with an organomagnesium compound in the presence of an organic silicon compound having Si-O bonds and an organic porous polymer, treating the resulting solid product with a ester compound and then reacting it with titanium tetrachloride or a mixture of titanium tetrachloride and a electron donative compound, and (B) an organoaluminum compound and a process for producing an ethylene copolymer using the same.