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US 5,264,405 AGranted
Monocyclopentadienyl titanium metal compounds for ethylene-.alpha.-olefin-copolymer production catalysts
AssigneeExxon Chemical Patents Inc.
InventorJo Ann M. Canich
Life of this patent
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Abstract
The invention is a catalyst system including a monocyclopentadienyl titanium compound and an alumoxane component which is highly productive for polymerizing ethylene and .alpha.-olefins to produce a high molecular weight ethylene-.alpha.-olefin copolymer having a high content of .alpha.-olefin.
Claims10
A catalyst system comprising:
- (A) a transition metal component of the formula ##STR7## wherein R.sup.1 and R.sup.2 are each independently a hydrocarbyl radical, each Q and Q' is independently a halide or a C.sub.1 -C.sub.20 hydrocarbyl radical, R' is an aliphatic or alicyclic hydrocarbyl radical of the formula (C.sub.n H.sub.2n +b) wherein "n" is a number from 3 to 20 and "b" is +1 for aliphatic and -1 for alicyclic ligands, and R' is covalently bonded to the nitrogen atom through a 1.degree. or 2.degree. carbon atom, L is a neutral Lewis base where "w" denotes a number from 0 to 3 and each R is, independently a C.sub.1-4 hydrocarbyl radical or hydrogen, x is 0, 1, 2, 3 or 4, and two adjacent R groups may join to form a C.sub.4-10 ring;
- and
- (b) an alumoxane.
A catalyst system comprising:
- (A) a transition metal component of the formula ##STR8## wherein R.sup.1 and R.sup.2 are each independently a hydrocarbyl radical, each Q and Q' is independently a halide or a C.sub.1 -C.sub.20 hydrocarbyl radical, R' is an aliphatic or alicyclic hydrocarbyl radical of the formula (C.sub.n H.sub.2n +b) wherein "n" is a number from 3 to 20 and "b" is +1 for aliphatic and -1 for alicyclic ligands, and R' is covalently bonded to the nitrogen atom through a 1.degree. or 2.degree. carbon atom, L is a neutral Lewis base where "w" denotes a number from 0 to 3 and each R is, independently a C.sub.1-4 hydrocarbyl radical or hydrogen, x is 0, 1, 2, 3 or 4, and two adjacent R groups may join to form a C.sub.4-10 ring;
- and
- (B) an alumoxane.
Dependencies are inferred from the claim text.