Functionalized polyurethanes
AssigneeCardioTech International, Inc.
InventorsMurray H. Reich, John Teffenhart
Life of this patent
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Abstract
The present invention relates to functionalizable and crosslinkable polyurethanes formed of a polyurethane intermediate including one or more ester groups which react with an amine equivalent to form an amide unit. The polyurethane intermediate comprises the reaction product of alkyl ester of dihydroxypolyacid or dimethylolalkanoic acid, a polyoxyalkylene diol and an organic diisocyanate. The polyurethane is reacted with a solution of an amine equivalent and a solvent or an amine. An article of manufacture can be formed from the polyurethane.
Claims38
A polyurethane comprising the reaction product of a poyurethane intermediate comprising an alkyl ester of dimethylolalkanoic acid or dihydroxypolyacid;
- a polyoxyalkylene diol;
- and
- an organic diisocyanate;
- and
- a solution of an amine equivalent and a solvent having less than about 50% by weight of water, said amine equivalent including one or more amine groups wherein said polyurethane comprises an amide.
A polyurethane comprising the reaction product of a polyurethane intermediate comprising of dimethylolalkanoic acid;
- a polyoxyalkylene diol;
- an organic diisocyanate;
- and
- an amine equivalent, said amine equivalent including one or more amine groups said polyurethane intermediate being crosslinked with an epoxy containing material selected from bisphenol-epichorohydrin, cycloaliphatic epoxy resins, epoxidized fatty acids, glycidyl methacryalate, glycidyl acrylate with a catalyst selected from a Lewis acid, tetrabutyl titanate, amine-blocked and unblocked alkane, aromatic sulfonic acid, benzyldimethyl amine, benzyldimethyl ammonium chloride, dimethylcyclohexylatnine, triethylenediamine, triethylenetetramine and triphenylphosphine wherein said polyurethane comprises an amide.
A polyurethane comprising the reaction product of a poyurethane intermediate comprising an alkyl ester of dimethylolalkanoic acid or dihydroxypolyacid;
- a polyoxyalkylene diol;
- an organic diisocyanate;
- and
- an amine equivalent, said amine equivalent including one or more amine groups wherein said polyurethane comprises an amide.
Dependencies are inferred from the claim text.