Polymerization catalyst activators, method of preparing, and their use in polymerization processes
AssigneeUnivation Technologies, LLC
InventorsMatthew W. Holtcamp, David Arthur Cano
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Abstract
New polymerization catalyst activators are disclosed which include a heterocyclic compound, which may or may not be substituted, and an aluminum alkyl or an aluminoxane. Supported activators of the invention include the heterocyclic compound, combined with an alkylaluminum or aluminoxane, and a support material, preferably a silica support material. Also disclosed are methods for preparing these catalyst activators and polymerization processes utilizing same.
Claims20
A catalyst system comprising a polymerization catalyst and an activator wherein the activator comprises a heterocyclic compound, which may be substituted or unsubstituted, utilized in combination with an aluminum containing compound.
A catalyst system comprising a polymerization catalyst, an activator, and an optional support material wherein the activator is represented one of the following formulae:
- (a.) (R′XM(JY)y)n
- or
- (b.) [((JY)yR′X)nM-O-M((R′X(JY)y)n]m
- or
- (c.) (OMR′X(JY)y)n
- wherein M is a Group 13 atom;
- (JY) represents a substituted or unsubstituted heterocyclic group attached to M, wherein Y represents the heterocyclic group as a whole and J represents at least one heteroatom contained in group Y;
- n is 1 or 2 in formula (a.);
- n is 2 in formula (b.);
- and n is a number from 1 to 1000 in formula (c.);
- m is a number from 1 to 10;
- x+y=the valence of M in formula (a.);
- x+y=the valence of M−1 in formula (b.);
- and x+y=valence of M−2 in formula (c.);
- each R′ is independently a substituent group bonded to M.
A method of preparing a supported catalyst system comprising combining a heterocyclic compound with an aluminoxane or an alkylaluminum compound with a support material such that the support material contains aluminum alkyl groups bonded thereto.
Dependencies are inferred from the claim text.