Low temperature curing coating composition
AssigneeE. I. Du Pont de Nemours and Company
InventorJoseph A. Vasta
Life of this patent
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Abstract
A low temperature curing coating composition containing 10-80% by weight of binder and 20-90% by weight of an organic solvent in which the binder is (1) an acrylic polymer containing monomers having reactive groups such as acrylamide, methacrylamide, methacrylic acid, acrylic acid and glycidyl methacrylate, (2) an epoxy resin, (3) a polyamine curing agent, (4) phenol and (5) a bicyclic amindine; The composition is used as a primer or topcoating for metal substrates and curings at temperatures of 0.degree. C. to ambient temperatures and provides a primer that has excellent adhesion to the substrate and provides a durable, corrosion resistant finish.
Claims17
A coating composition comprising 10-80% by weight of binder and 20-90% by weight of an organic solvent;
- wherein the binder consists essentially of
- (1) an acrylic polymer containing 0.1-10% by weight of polymerized monomers having reactive groups selected from the group consisting of acrylamide, methacrylamide, methacrylic acid, acrylic acid and glycidyl methacrylate,
- (2) an epoxy resin,
- (3) a polyamine curing agent of the formula ##STR6## where R.sup.1 is R.sup.2 NH.sub.2 and R.sup.2 is an aliphatic or cycloaliphatic radical
- (4) phenol and
- (5) a bicyclic amidine.
A two-component composition, wherein the two components are mixed together to form a composition comprising about 10-80% by weight binder and 20-90% by weight organic solvent and wherein the components comprise
- component (1) a solution of an acrylic polymer containing 0.1-10% by weight of polymerized monomers having reactive groups selected from the group consisting of acrylamide, methacrylamide, methacrylic acid, acrylic acid and glycidyl methacrylate, and an epoxy resin,
- component (2) a polyamine curing agent, phenol and a bicyclic amidine.
Dependencies are inferred from the claim text.