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US 2010/0160582 A1Published application
Catalysts for catalytic chain transfer
AssigneeE. I. Du Pont de Nemours and Company
InventorsGregory A. Nikiforov, Alexei A. Gridnev
Life of this patent
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Abstract
Cobaloxime derivatives and methods of producing cobaloxime derivatives are disclosed herein. Methods of producing decolorized homo- and co-polymers through polymerization of monomers in presence of the cobaloxime derivatives and decolorization of the produced polymer by exposing the polymer to a sorbent and, optionally, a solvent are also disclosed herein.
Claims10
(canceled)
A cobaloxime derivative of having the formula:
- wherein Py is 4-(dimethylamino)pyridine, or
- wherein R7 is 4-(dimethylamino)pyridine, or
3-7. (canceled)
A method of producing decolorized homo- and co-polymers comprising:
- (a) polymerizing at least one monomer in the presence of a cobaloxime derivative;
- and
- (b) decolorizing the polymer produced by step (a) by exposing the polymer to a sorbent and, optionally, a solvent;
- wherein the cobaloxime derivative has the formula
- wherein Py is 4-(dimethylamino)pyridine, or
- wherein R7 is 4-(dimethylamino)pyridine, or
3 more elements
9-36. (canceled)
Dependencies are inferred from the claim text.