US 5,212,241 A · Glycidyl-epoxy-acrylic copolymers

Abstract

A protective paint coating containing a polymeric binder having both hydrophobic and hydrophilic moieties in the polymeric structure comprises an acrylic-graft terpolymer. The terpolymer comprises aliphatic-modified glycidyl acrylate and epoxy resin coreacted with diphenol to form the terpolymer. Ethylenically unsaturated monomers, including carboxyl monomers, are in-situ copolymerized in the presence of the terpolymer to produce the acrylic-graft terpolymer. The aliphatic-modified glycidyl acrylate component of the terpolymer comprise the reaction product of a glycidyl acrylate and an aliphatic ethylenic monomer having a chain of 2 to 20 carbon atoms. The aliphatic chain and the carboxyl functionality provide the self-contained wetting agent properties to the polymeric binder structure.

Claims10

Dependent claims

A protective surface coating containing a polymeric binder having a self-contained wetting agent structure, the polymeric binder comprising:

an acrylic-graft terpolymer comprising on a weight basis between about 2% and 20% of an aliphatic-modified glycidyl acrylate, between about 30% and 80% epoxy resin, between about 0.2% and 30% diphenol, and between about 15% to 25% in-situ formed acrylic copolymer of copolymerized ethylenically unsaturated monomers including carboxyl monomers;
and
said acrylic-graft terpolymer formed by first forming a terpolymer by coreacting epoxy resin and aliphatic-modified glycidyl acrylate with diphenol to form the terpolymer, and then in-situ copolymerizing the ethylenically unsaturated monomers in the presence of the terpolymer and in the presence of at least 3% by weight peroxide initiator at temperatures from about 70.degree. C. to 170.degree. C. to produce the acrylic-graft terpolymer.

Dependencies are inferred from the claim text.

Glycidyl-epoxy-acrylic copolymers

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Glycidyl-epoxy-acrylic copolymers

Life of this patent

Abstract

Claims10