Functional organic particles for catalyst supports
AssigneeThe Governors of the University of Alberta
InventorsPeter Phung Minh Hoang, Charles Russell, Jason Roy Kearns, Sieghard E. Wanke, David T. Lynch, Nai-Hong Li
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Abstract
Functional polymers containing hydroxyl groups as supports for use with catalysts can increase the activity of these catalysts which results in improved ethylene polymerization. The present invention seeks to provide catalysts with improved activity by incorporating 2-hydroxyethyl methacrylate (HEMA) into the support of the catalyst.
Claims73
A polymeric support for use in association with a catalyst system comprising a co-catalyst of the formula R12AlO(R1AlO)mAlR12 wherein each R1 is independently selected from the group consisting of C1-20 hydrocarbyl radicals and m is from 3 to 50, and a catalyst of the formula:
- (L)n—M—(X)p
- wherein M is a transition metal;
- L is a monoanionic ligand independently selected from the group consisting of a cyclopentadienyl-type ligand, a bulky heteroatom ligand and a phosphinimine ligand;
- X is an activatable ligand;
- n may be 2 or 3;
- and p may be 1 or 2, provided that the sum of n+p equals the valence state of M, only one cyclopentadienyl type ligand may be present in the catalyst, and further provided that two L ligands may be bridged by a silyl radical or a C1-4 alkyl radical said support comprising the suspension or emulsion polymerization product of a feedstock substantially consisting of:
- (i) from 0 to 95 weight % of one or more C4-12 vinyl monomers;
- (ii) from 50 to 2 weight % of a crosslinking agent;
- and
- (iii) from 70 to 3 weight % of a functionalized monomer selected from the group consisting of C1-8 hydroxy esters of C3-6 ethylenically unsaturated carboxylic acids, and chloride derivatives thereof;
- the sum of the weight % of said monomers being 100 weight %, and having a particle size from 0.1 to 1000 microns, surface area of greater than 10 m2/g and a pore volume of at least 0.2 cc/g of support.
Dependencies are inferred from the claim text.