GB911050A - Polymerisable compositions - Google Patents

Abstract

Phosphated and tin-plated steel plates are spray coated with compositions comprising a copolymer of methyl methacrylate, coconut palm kernel alcohol methacrylate and methacrylic acid, titanium dioxide, diphenylol propane diglycidyl ether, oxypropylated diethyl amino propylamine, xylene and butanol and:-(1) and (3) a phthalic anhydride-polypropylene glycol reaction product and (2) succinic anhydride and polypropylene glycol and heated.ALSO:A polymerizable composition comprises a copolymer of methyl metahcrylate with from 1 to 10% by weight of the copolymer of a polymerizable carboxylic acid and optionally an alkyl methacrylate wherein the alkyl radical contains from 4 to 16 carbon atoms, a polyepoxy compound, a basic organic catalyst, a solvent and as plasticizer an acid ester obtained by the reaction of one molecular proportion of polypropylene glycol and substantially two molecular proportions of phthalic or succinic anhydride. Specified polymerizable carboxylic acids are acrylic, crotonic, fumaric, maleic and itaconic acids. Specified polyepoxides which may be admixed with monoepoxides, e.g. phenyl-2:3-epoxypropyl ether and 2:3-epoxypropyl-N-phenylcarbamate are 1:2-3:4-diepoxybutane, 1:2-5:6-diepoxy-2:5-dimethyl hexane, methyl di(2:3-epoxypropyl)acetate, 1:4-divinylbenzene diepoxide, di(2:3-epoxypropyl)ether, glycerol tri-(2:3-epoxypropyl)ether, m- and p-di(2:3-epoxypropyl)benzenes, 2:2-di[4-(2:3-epoxypropoxy)-phenyl] propane, N:N-di(2:3-epoxypropyl) sebacate, (2:3-epoxypropyl) sebacate dimer, di-(2:3-epoxypropyl)itaconate, di(2:3-epoxypropyl)-isophthalate, tri(2:3-epoxypropyl)trimesate, N:N-di(2:3-epoxypropyl)-p-toluene sulphonamide and condensation products of epichlorhydrin or glycerol dichlorhydrin with polyhydric phenols and phenolaldehyde condensates. Specified catalyst are 2:4:6-tri(dimethylaminomethyl)phenol, triethylamine, dimethylaniline, pyridine, N:N-dimethyl: 3-propanediamine, diethylene triamine, 2:5di(dimethylaminomethyl)quinol, N:N-dimethylcyclohexylamine, N:N-dimethylbenzylamine, N:N:N1:N1-tetramethylhexamethylenediamine, 2-(dimethylaminomethyl)-cyclohexane, phenyl-2-(dimethylamino)ethyl ketone, di[2-)diethylamino)ethyl]-adipate, N-ethylhexamethyleneimine, hexamethyleneimine, N-methylbenzylamine, ben. zyltrimethyl ammonium hydroxide, benzyl trimethyl ammonium acetate, the triacetate of 2:4:6-tri(dimethylaminomethyl)phenol and oxyalkylated amines. Solvents specified are xylene, butanol, toluene, methyl ethyl ketone and ethyl acetate. The examples disclose reactive compositions comprising polyesters derived from polypropylene glycol and:-(1) and (3) phthalic anhydride and (2) succinic anhydride in admixture with a copolymer of methyl methacrylate, coconut palm kernel alcohol methacrylate and methacrylic acid, titanium dioxide, diphenyl propane diglycidyl ether, oxypropylated diethylaminopropylamine, xylene and butanol, the mixtures being applied to steel panels and aired by heating. Specification 809,658 is referred to.