Method of preparing a coating composition

Claim 1

A method of preparing a coating composition which comprises (i) mixing and reacting a sufficient amount of a volatile amine with a water reducible composition comprised of an admixture or solution of (a) an aqueous resin emulsion, (b) coalescing solvent and (c) plasticizer and (ii) mixing sufficient water therewith to form a stable dispersion or solution of said composition having a pH in the range of about 8 to about 14, where said water reducible composition comprises an admixture or solution of 100 parts of the said resin emulsion with about 50 to about 100 parts by weight of a coalescing solvent therefor comprising at least one solvent selected from ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol diethyl ether, ethylene glycol monomethyl ether acetate, methyl ethyl ketone, acetone, methyl propyl ketone and diacetone alcohol and about 5 to about 70 parts by weight of at least one compatible plasticizer characterized by having a melting point of about -40° C. to about 25° C., a boiling point of at least 95° C. and a solubility parameter of about 8 to about 16, where said resin, when in solid form, has a Ring and Ball softening point in the range of about 100° C. to about 300° C., and is prepared by the method which comprises free radical aqueous emulsion polymerizing, in an aqueous medium having a pH in the range of about 2 to about 7, or free radical organic solution polymerizing a monomer mixture which comprises, based on 100 weight percent of monomers (1) about 70 to about 85 weight percent of at least one hard segment hydrophobic enhancing monomer selected from styrene, α-methyl styrene, acrylonitrile, vinyl toluene, methyl methacrylate, vinyl chloride and vinylidene chloride, (2) about 15 to about 25 weight percent of at least one soft segment hydrophobic enhancing monomer selected from at least one acrylate selected from methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, laural acrylate, isodecyl methacrylate, butyl methacrylate, isobutyl methacrylate, at least one vinyl ether selected from ethyl, butyl, octyl, decyl and cetyl vinyl ether and/or at least one diene selected from 1,3-butadiene, isoprene and 2,3-dimethyl butadiene, provided that said dienes of monomer part (B) and said monomer part (A) vinyl chloride and vinylidene chloride are not mixed together and copolymerized, and (C) about 3 to 10 weight percent of at least one hydrophilic enhancing organic acid selected from acrylic, methacrylic, fumaric, itaconic and maleic acid, and where said volatile amine is selected from primary, secondary and tertiary amines having a melting point in the range of about -40° C. to about 25° C. and a boiling point in the range of about 50° C. to about 150° C.

Claim 2

A method of preparing a coating composition which comprises (i) mixing and reacting a sufficient amount of a volatile amine with a water reducible composition comprised of an admixture or solution of (a) an aqueous resin emulsion, (b) coalescing solvent and (c) plasticizer and (ii) mixing sufficient water therewith to form a stable dispersion or solution of said composition having a pH in the range of about 8 to about 14, where said water reducible composition comprises an admixture or solution of 100 parts of the said resin emulsion with about 50 to about 100 parts by weight of a coalescing solvent therefor comprising at least one solvent selected from ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monobutyl ether, diethylene glycol monoethyl ether acetate, diethylene glycol diethyl ether, ethylene glycol monomethyl ether acetate, methyl ethyl ketone, acetone, methyl propyl ketone and diacetone alcohol and about 5 to about 70 parts by weight of at least one compatible plasticizer characterized by having a melting point of about -40° C. to about 25° C., a boiling point of at least 95° C. and a solubility parameter of about 8 to about 16, where said resin, when in solid form, has a Ring and Ball softening point in the range of about 100° C. to about 300° C., and is prepared by the method which comprises free radical aqueous emulsion polymerizing, in an aqueous medium having a pH in the range of about 2 to about 7, or free radical organic solution polymerizing a monomer mixture which comprises, based on 100 weight percent of monomers (1) about 70 to about 85 weight percent of at least one hard segment hydrophobic enhancing monomer selected from styrene, α-methyl styrene, acrylonitrile, vinyl toluene, methyl methacrylate, vinyl chloride and vinylidene chloride, (2) about 15 to about 25 weight percent of at least one soft segment hydrophobic enhancing monomer selected from at least one acrylate selected from methyl acrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, laural acrylate, isodecyl methacrylate, butyl methacrylate, isobutyl methacrylate, at least one vinyl ether selected from ethyl, butyl, octyl, decyl and cetyl vinyl ether and/or at least one diene selected from 1,3-butadiene, isoprene and 2,3-dimethyl butadiene, provided that said dienes of monomer part (B) and said monomer part (A) vinyl chloride and vinylidene chloride are not mixed together and copolymerized, and (C) about 3 to 10 weight percent of at least one hydrophilic enhancing organic acid selected from acrylic, methacrylic, fumaric, itaconic and maleic acid, and where said volatile amine is selected from primary, secondary and tertiary amines having a melting point in the range of about -40° C. to about 25° C. and a boiling point in the range of about 50° C. to about 150° C.