Patent GB-1491366-A (GB)
Title: Coating composition
IPC: C08F16/00
Filed: 1975-10-10
Abstract: 1491366 Coating composition GOODYEAR TIRE & RUBBER CO 10 Oct 1975 [4 Nov 1974] 41613/75 Heading C3P [Also in Division B2] A coating composition comprises an aqueous solution or dispersion prepared by (i) mixing and reacting sufficient amount of a volatile amine selected from primary, secondary and tertiary amines having a melting point of -40-25 C. and a boiling point of 50-150 C<SP>3</SP> with a water dilutable composition composed of a solution or other mixture of (a) a solid, particulate resin, or an emulsion polymerization mixture containing a solid, particulate resin, (b) coalescing solvent, and (c) plasticizer, and (ii) mixing sufficient water therewith to form a stable dispension or solution of said composition having a pH 8-14; where said water reducible composition comprises a solution or other mixture of 100 parts by weight of the solid resin with 50-100 parts by weight of a coalescing solvent therefor comprising at least one solvent selected from ethylene glycol monomethyl ether, ethylene glycol, monoethyl ether, diethyleneglycol monoethyl ether, diethylene glycol monomethyl 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 5-70 parts by weight of at least one compatible plasticizer characterized by having a melting point of -40-25 C., a boiling point of at least 25 C. and a solubility parameter of 8-16; where said resin has a Ring and Ball softening point of 100-300 C. and is prepared by the method which comprises: (I) free radical aqueous emulsion polymerizing, in an aqueous medium having a pH of 2-7, or free radical organic solution polymerizing a monomer mixture which comprises, based on 100 weight per cent of monomers, (A) 70-85 weight per cent 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, (B) 15-25 weight per cent 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, lauryl 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) 3-10 weight per cent of at least one hydrophilic enhancing organic acid selected from acrylic, methacrylic, fumaric, itaconic and maleic acid, and (II) recovering said resin from the emulsion as a solid, particulate resin, if said resin is not to be utilized in emulsion polymerization mixture form. "Coalescing solvent" is defined as a solution-forming or emulsion-forming liquid additive. The coating composition may be applied to a substrate surface, e.g. glass, aluminium or steel and the coating subsequently dried to remove water, volatile amine and coalescing solvent. In the specific examples copolymers produced from A. styrene alone or with α-methyl styrene, acrylonitrile, vinyl toluene and methyl methacrylate; B. 2-ethyl hexyl acrylate, butyl acrylate or ethyl acrylate; or C acrylic or methacrylic acid are mixed with ethylene glycol monoethyl ether or ethylene glycol monobutyl ether as coalescing solvent and a plasticizer sleeted from chlorinated paraffin, hydrogenated terphenyl, tributoxyethyl phosphate, styrenated phenol, polypropylene glycol dibenzoate, tricresyl phosphate, diisoctyl adipate, butyl phthalyl butyl glycoate, N-ethyl toluene sulphonamides, diisooctyl sebacate, diisodecyl phthalate, triisodecyl mellitate, dipropyleneglycol dibenzoate, diisooctyl azelate, tri-2- ethylhexyl citrate. A water reduced paint is produced in Example V containing titanium dioxide, calcium carbonate, amorphous silica and an inert aluminium silicate as fillers and is applied to an asbestos-cement substrate.