Polymerization catalyst system

Claim 2

A catalyst system for the polymerization of olefins comprising (1) an olefin polymerization catalyst comprising a compound containing a metal of Groups IVb, Vb, and VIb, and (2) a cocatalyst comprising at least one compound of the formula ##STR4## wherein each 100 is an aryl radical, R is an aryl, or --O--AIR' 2 and wherein each R' is individually selected from hydrogen, halides, alkyl, aryl, alkoxy, and aryloxy radicals, with the further requirement that if one of the R' radicals attached to an Al atom is a halide, the other must be a radical other than hydrogen and that only one of the R' radicals attached to each Al atom can be hydrogen.

Claim 3

A catalyst system according to claim 1 wherein the catalyst (1) comprises a compound of titanium or vanadium.

Claim 4

A catalyst system according to claim 1 wherein the catalyst (1) comprises titanium tetrachloride supported on magnesium dichloride.

Claim 5

A catalyst system according to claim 3 wherein each R' is an alkyl radical having 1 to 4 carbon atoms.

Claim 6

A catalyst system according to claim 4 wherein each R' is an ethyl radical and each aryl radical is a phenyl radical.

Claim 7

A catalyst system for the polymerization of olefins comprising (1) an olefin polymerization catalyst comprising a compound containing a metal of Groups IVb, Vb, and VIb, and (2) a cocatalyst prepared by reacting a silicon compound of the formula ##STR5## wherein each φ is an aryl radical, R is an aryl, alkyl, cycloalkyl, aralkyl, alkaryl, or hydroxyl radical with an aluminum compound of the formula AlR'.sub.3 wherein each R' is individually selected from hydrogen, halides, alkyl, aryl, alkoxy, and aryloxy radicals with the further requirements that if one R' is a halide the other R' radicals must be selected from radicals other than hydrogen and that only one R' can be hydrogen.

Claim 8

A catalyst system for the polymerization of olefins comprising (1) an olefin polymerization catalyst comprising a compound containing a metal of Groups IVb, Vb, and VIb, and (2) a cocatalyst prepared by reacting a silicon compound of the formula ##STR5## wherein each φ is an aryl radical, R is an aryl, alkyl, cycloalkyl, aralkyl, alkaryl, or hydroxyl radical with an aluminum compound of the formula AlR'.sub.3 wherein each R' is individually selected from hydrogen, halides, alkyl, aryl, alkoxy, and aryloxy radicals with the further requirements that if one R' is a halide the other R' radicals must be selected from radicals other than hydrogen and that only one R' can be hydrogen.

Claim 9

A catalyst system according to claim 6 wherein the catalyst (1) comprises a compound of titanium or vanadium.

Claim 10

A catalyst system according to claim 7 wherein the catalyst (1) comprises titanium tetrachloride supported on magnesium dichloride.

Claim 11

A catalyst system according to claim 8 wherein each R' is an alkyl radical having 1 to 4 carbon atoms.

Claim 12

A catalyst system according to claim 9 wherein the cocatalyst is prepared by reacting triethylaluminum and triphenylsilanol.

Claim 13

A catalyst system according to claim 10 wherein about 0.2 to about 1 mole of triphenylsilanol is employed per mole of triethylaluminum.

Claim 14

A catalyst system according to claim 8 wherein said cocatalyst is prepared by reacting triethylaluminum and diphenylsilane diol.

Claim 15

A catalyst system according to claim 8 wherein said cocatalyst is prepared by reacting diisobutylaluminum hydride and triphenylsilanol.

Claim 16

A composition of matter having the formula ##STR6## wherein each φ is a phenyl radical, R is a phenyl radical, and wherein each R' is individually selected from hydrogen, halides, alkyl, aryl, alkoxy, and aryloxy radicals, with the further requirement that if one of the R' radicals attached to Al is a halide, the other must be a radical other than hydrogen and that only one of the R' radicals attached to each Al atom can be hydrogen.

Claim 17

A composition of matter having the formula ##STR6## wherein each φ is a phenyl radical, R is a phenyl radical, and wherein each R' is individually selected from hydrogen, halides, alkyl, aryl, alkoxy, and aryloxy radicals, with the further requirement that if one of the R' radicals attached to Al is a halide, the other must be a radical other than hydrogen and that only one of the R' radicals attached to each Al atom can be hydrogen.

Claim 18

A composition according to claim 14 wherein R is a phenyl radical, each φ is a phenyl radical and each R' is an ethyl radical.