Patent GB-926283-A (GB)
Title: Copolymers and aqueous compositions thereof
IPC: C08F220/18
Filed: 1959-07-02
Abstract: Stone, cement, concrete, bricks, cinder blocks, asbestos cement shingles and metals may be coated with compositions comprising aqueous dispersions of water-insoluble linear addition copolymers of a mixture of (A) 2 to 20 weight per cent of 3-chloro-2-hydroxypropyl acrylate or methacrylate, (B) 25 to 54 weight per cent of methyl and/or ethyl acrylate and (C) 40 to 73 weight per cent of at least one ester of acrylic acid with an aliphatic alcohol containing 3 to 8 carbon atoms, optionally with (D) up to 10 weight per cent of a neutral, monoethylenically unsaturated copolymerizable compound.  The compositions may also comprise pigments, dyes and fillers, e.g. azo pigments and lakes, phthalo-cyanine pigments, vat dyestuffs, carbon black, iron oxides, chrome yellows, titanium dioxide, lithopone, powdered or flaked metals such as aluminium, bronze, brass, chromium or gold; thickeners, e.g. gum tragacanth, cellulose ethers, polyvinyl alcohol, partially saponified polyvinyl acetate or sodium alginate; mild alkali, e.g. sodium acetate, sodium carbonate, chalk, morpholine or ammonia; water-soluble or self-dispersible ureaformaldehyde, ethylene urea-formaldehyde or aminotriazine-formaldehyde condensates, e.g. pentamethylol melamine, hexamethylol melamine or the methyl ethers thereof; and acid or latent acid catalysts, e.g. ammonium and amine salts.  The compositions may be applied by spraying, brushing, roller-coating, dipping or knife-coating, and the coatings air-dried or dried and cured by hot air, infra red lamps or electrical induction devices. Example 1 describes the spraying of asbestos cement shingles with aqueous dispersions of a copolymer of 3-chloro-2-hydroxy-propyl methacrylate, ethyl acrylate and n-butyl acrylate.ALSO:Water-insoluble linear addition copolymers of a mixture of (A) 2 to 20 weight per cent of 3-chloro-2-hydroxypropyl acrylate and/or methacrylate, (B) 25 to 54 weight per cent of methyl and/or ethyl acrylate and (C) 40 to 73 weight per cent of at least one ester of acrylic acid with an aliphatic alcohol containing 3 to 8 carbon atoms, optionally with (D) up to 10 weight per cent of a neutral, monoethylenically unsaturated copolymerizable compound, may be prepared by emulsion polymerization in the presence of a free radical polymerization initiator.  Polymerization may be effected in the presence of an emulsifier, e.g. t-octyl phenolethylene oxide condensate; and specified catalysts are alkali metal and ammonium persulphates and perborates, hydrogen peroxide, t-butyl hydroperoxide, cumene hydroperoxide and t-butyl perbenzoate, preferably together with reducing agents such as water-soluble bisulphites, thiosulphates, hydrosulphites and salts of cobalt, iron, nickel and copper.  The aqueous dispersions so obtained may be used as coating compositions, which may also comprise pigments, dyes and fillers, e.g. azo pigments and lakes, phthalocyanine pigments, vat dyestuffs, carbon black, iron oxides, chrome yellows, titanium dioxide, lithopone, powdered or flaked aluminium, bronze, brass, chromium or gold; thickeners, e.g. gum tragacanth, cellulose ethers, polyvinyl alcohol or partially saponified polyvinyl acetate; mild alkali, e.g. sodium acetate, sodium carbonate, chalk, morpholine or ammonia; water-soluble or self dispersible urea-formaldehyde, ethylene urea-formaldehyde or aminotriazine-formaldehyde condensates, e.g. pentamethylol melamine, hexamethylol melamine or the methyl ethers thereof; and acid or latent acid curing catalysts, e.g. ammonium and amine salts.  The compositions may be used for coating paper, leather, textiles, metals, stone, cement, concrete, bricks, asbestos cement shingles and cinder blocks, and for printing and dyeing textile fabrics.  Examples describe (1) the preparation of an aqueous dispersion of a copolymer of 3-chloro-2-hydroxypropyl methacrylate, ethyl acrylate and n-butyl acrylate; and aqueous compositions comprising copper phthalocyanine, ammonia, an ethylene oxide-t-octyl phenol condensate, sodium alginate, the hydrochloride of 2-methyl-2-aminopropanol-1 and (2) a copolymer of 3-chloro-2-hydroxypropyl methacrylate, ethyl acrylate and n-butyl acrylate, (3) a copolymer of 3-chloro-2-hydroxypropyl and ethyl acrylates and 2-ethylhexyl acrylate, and (4) a copolymer of 3-chloro-2-hydroxypropyl, ethyl and n-butyl acrylates and acrylonitrile.ALSO:Aqueous compositions for pigment dyeing textile fabrics comprise dispersions of waterinsoluble linear addition copolymers of a mixture of (A) 2 to 20 weight per cent of 3-chloro-2-hydroxypropyl acrylate and/or methacrylate, (B) 25 to 54 weight per cent of methyl and/or ethyl acrylate and (C) 40 to 73 weight per cent of at least one ester of acrylic acid with an aliphatic alcohol containing 3 to 8 carbon atoms, optionally with (D) up to 10 weight per cent of a neutral, monoethylenically unsaturated copolymerizable compound.  The dispersions may also contain pigments, and fillers, e.g. azo pigments and lakes, phthalocyanine pigments, vat dyestuffs, carbon black, iron oxides, chrome yellows, titanium dioxide, lithopone, powdered of flaked aluminium, bronze, brass, chromium or gold; thickeners, e.g. gum tragacanth, cellulose ethers, polyvinyl alcohol or partially saponified polyvinyl acetate; mild alkali, e.g. sodium acetate, sodium carbonate, chalk, morpholine or ammonia; watersoluble or self-dispersible urea-formaldehyde, ethylene urea-formaldehyde or aminotriazineformaldehyde condensates, e.g. pentamethylol melamine and hexamethylol melamine or methyl ethers thereof; and acid or latent acid curing catalysts, e.g. ammonium or amine salts.  Examples describe the treatment of cotton sheeting with aqueous dispersions.