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US 7,030,202 B2Granted
Graft copolymers and method to prepare same
AssigneePolymer Chemistry Innovations, Inc.
InventorsBernard Gordon, III, Jim DiBattista
Life of this patent
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Abstract
A thermally processable graft copolymer formed from a water soluble polymer and a water insoluble polymer, wherein the graft copolymer forms a hydrogel upon exposure to water. A method to form such a hydrogel-forming graft copolymer by copolymerizing a water soluble 2-substituted-2-oxazolines with a water insoluble 2-substituted-2-oxazoline. A method to form such a hydrogel-forming graft copolymer by transamidating a poly-2-oxazoline with a carboxylic acid terminated water-insoluble polymer.
Claims1
A polymeric material having the structure
- wherein R1 is selected from the group consisting of hydrogen, methyl, ethyl, and propyl, X is selected from the group consisting of acetate, p-tosylate, halide, sulfate, triflate, and mixtures thereof, and POLYMER2 is a water-insoluble polymeric material having a number average molecular weight in excess of 5,000, wherein POLYMER2 has the structure
- wherein R2 is selected from the group consisting of hydrogen, methyl, and mixtures thereof, and R3 is selected from the group consisting of hydrogen, methyl, ethenyl, isopropenyl, carbomethoxy, phenyl, and mixtures thereof,
- wherein n is between about 50 to about 10,000, m is adjusted such that m/(n+m) is between about 0.0001 to about 0.20, and p is between about 60 to about 1250.
Dependencies are inferred from the claim text.