HUMIDITY RESISTANT COATINGS EMPLOYING BRANCHED POLYMERS OF T-BUTYL ACRYLATE

摘要

hydroxypropyl methacrylate and mixtures thereof. 17. The coating composition of claim 10 wherein the copolymer is comprised of from about 5 to about 60 weight percent of component (d), other ethylenically unsaturated monomers. 18. The coating composition of claim 10 wherein the crosslinker is a polyepoxide or an etherated amino-formaldehyde resin. 19. A coating composition comprised of (1) A copolymer comprised of: (a) from about 30 to about 60 weight percent t-butyl acrylate; (b) from about 0.5 to about 2 weight percent trimethylol propane triacrylate; (c) from about 5 to about 20 weight percent of one of acrylic acid, methacrylic acid, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate and mixtures thereof; and (d) from about 5 to about 60 weight percent of other ethylenically unsaturated monomers which are capable of polymerizing with t-butyl acrylate and polyfunctional acrylates wherein the weight percents of components (a) through (d) are based upon the total weight percent of the copolymer; and (2) a polyepoxide or an etherated amino-formaldehyde resin. 20. The coating composition of claim 19 wherein the polyepoxide is a cycloaliphatic epoxide or a diglycidyl epoxide.