Catalyst system for (co)polymerization of ethylene in solution

Claim 1

Catalyst system, suitable for the (co)polymerization of ethylene and optionally minor amounts of 1-alkenes and/or dienes at such temperatures that the copolymer formed goes into solution, to be prepared by combining at least two components A and B, which components comprise: A: one more moe magnesium compounds, one or more aluminium compounds, one or more transition metal compounds and optionally one or more halogen compounds, in such amounts that the atomic ratio of halogen to magnesium is at least 2, the atomic ratio of aluminum to transition metal is at least 3, the atomic ratio of aluminum to magnesium is at least 1, and the atomic ratio of magnesium to transition metal is at least 0.5, said transition metal compound(s) being one or more titanium compound(s) of the general formula Ti(OR 6 )4--pX 2 p and/or Ti(OR 7 )3--qX 3 q, where the symbols R 6 and R 7 are equal or different and represent hydrocarbon radicals with 1-20 carbon atoms, X 2 and X 3 halogen atoms, 0<p<4 and 0<q<3, said magnesium compound(s) being of the general formula R 8 r MgX 4 2-r , where R 8 represents a hydrocarbon radical with 1-20 carbon atoms and X 4 a halogen atom or an alkoxy group, and 0<r<2, said aluminum compound(s) being of the general formula R 9 s AlX 5 3-s , where the symbols R 9 are equal or different and represent a hydrocarbon radical with 1-20 carbon atoms, X 5 represents a halogen atom and 0<s<3, with the optional halogen compound(s) being chlorides; B: one or more organoaluminium compounds of the general formula R m 1 AlX 1 3-m , where the symbols R 1 are equal or different and represent a hydrocarbon radical with 1-20 carbon atoms and the symbols X 1 are equal or different and represent a hydrogen atom, a group of the general formula --NR 2 2 (where R 2 is a hydrocarbon radical with 1-10 carbon atoms), a group of the general formula --[OR 3 (where R 3 is a hydrocarbon radical with 1-20 carbon atoms or a group of the general formula --Si(R 4 ) 3 , where the symbols R 4 are equal or different and represent a hydrogen atom and/or a hydrocarbon radical with 1-20 carbon atoms), and 0<m<3, or a group of the general formula [--(OAlR 5 )] n --OAlR 2 5 ]--(OAlR 5 ) n --OAlR 2 5 , where the symbols R 5 are equal or different and represent a hydrocarbon radical with 1-10 carbon atoms, and n≧0, which two components are, separately or in combination, supplied direct to the polymerization vessel in such amounts that the atomic ratio of the aluminum from component B to the aluminium from component A is at least 0.1.