GB738340A - Improvements in or relating to freeze resistant aqueous polymer-containing paint - Google Patents

Abstract

An aqueous synthetic polymer-containing paint contains from 5 to 40 per cent on the polymer of an amino acid or a hydrochloride thereof. The polymer may be prepared from butadiene, isoprene, piperylene, 2-chloro-, 2,3-dimethyl-, 2,3-dichloro-, 2-bromo-, 2-pheno-, or 2,3-dipheno-butadiene, styrene, vinyl toluene, divinyl benzene, the chlorostyrenes, the alkyl styrenes, alpha-chloro- or methyl-styrene, vinyl naphthalene or pyridine or carbazole, acrylic acid or amide, methyl acrylate or methacrylate, methacrylic acid or amide, acrolein, acrylo- or methacrylo-nitrile, vinyl chloride, bromide, fluoride, acetate, formate or propionate, vinyl methyl or ethyl ether, divinyl methyl ketone, vinyl ethyl or isobutyl ketone, divinyl ketone, vinyl ethyl sulphone, the vinyl thioethers, vinylidene cyanide or fluoride, 1-chloro-1-fluoroethene, chlorotrifluoroethylene, isobutene, ethylene and propylene. Copolymers of a minor proportion of a conjugated diene and a major proportion of a monoethylenically unsaturated compound, e.g. styrene, are preferred. Specified amino acids are glycine. valine, arginine, alpha- or beta-aminobutyric acid, alpha- or gamma-amino-n-valeric acid, beta-hydroxyalanine, proline, alpha-amino-beta-phenyl-propionic acid, methionine, beta-alanine, epsilon-amino-n-caproic acid, omega-amino-n-dodecanoic acid, cysteine, citrulline, 4-hydroxypyroline, threonine, beta-hydroxyglutamic acid, and lysine. Specified paint pigments are titanium dioxide, clay, silica, lithopone, mica, barium sulphate, talc, zinc sulphide, carbon black, iron oxides, cadmium yellows, phthalocyanins, ultramarine, chromium oxides, umber and sienna while pigment dispersing agents which may be present are water-soluble soaps, the aliphatic or aromatic sulphonates, the sulpholignins, the aliphatic sulphates, soluble phosphates, polyethers, ether-alcohol condensates, casein, soyabean protein, albumens and cellulose ethers. An antifoaming agent such as pine oil and tributyl phosphate may be present.