Polymerization catalyst activators, method of preparing, and their use in polymerization processes
AssigneeUnivation Technologies, LLC
InventorsMatthew W. Holtcamp, David Arthur Cano
Life of this patent
Estimating the term…
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.
Claims43
A polymerization process comprising combining ethylene, at least one C4 to C12 α-olefin and a catalyst system comprising a polymerization catalyst and an activator;
- wherein the activator comprises a heterocyclic compound, which may be substituted or unsubstituted, in combination with an aluminum containing compound;
- wherein the aluminum containing compound is an alumoxane or an alkylaluminum compound represented by the formula AlR3 wherein each R is independently a substituted or unsubstituted alkyl group.
A polymerization process comprising combining ethylene, at least one C4 to C12 α-olefin and a catalyst system comprising a polymerization catalyst, an inorganic oxide support and an activator;
- wherein the activator comprises a heterocyclic compound in combination with an alkylaluminum compound represented by the formula AlR3 wherein each R is independently a substituted or unsubstituted alkyl group;
- wherein the heterocyclic compound comprising at least one atom selected from Group 15 or 16 of the Periodic Table of Elements;
- and
- wherein the polymerization catalyst is selected from bulky ligand metallocene catalysts, Group 15 atom containing polymerization catalyst compounds, and phenoxide transition metal catalyst compositions.
A polymerization process comprising combining ethylene, at least one C4 to C2 α-olefin and a supported catalyst system;
- the supported catalyst system prepared by 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.