Back to results
US 4,719,267 AGranted
Heat curable one package polyurethane resin composition
AssigneeEssex Specialty Products, Inc.
InventorsSidky Rizk, Harry W. S. Hsieh
Life of this patent
Estimating the term…
Abstract
A heat curable one package polyurethane resin composition adaptable to use for automotive seam sealing, particularly under high solids acrylic enamel paints, said composition comprising an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and the isocyanate groups of which are blocked by reaction with an oxime, and a curing agent having at least two active hydrogen atoms per molecule, such as a polyol, a polyamine, or a blocked polyamine.
Claims10
A one-package, solventless heat curable polyurethane resin composition consisting essentially of
- (1) an isocyanate terminated polyurethane prepolymer having pendant epoxy groups along the polymer chain and prepared by reacting an excess of a polyisocyanate with a mixture of a polyol and a di-o-methylol derivative of Bisphenol A diglycidyl ether, the isocyanate groups of which prepolymer are blocked by reaction with an oxime;
- and
- (2) a curing agent having at least two active hydrogen atoms per molecule.
Dependencies are inferred from the claim text.