Patent GB-960361-A (GB)
Title: Coating compositions
Inventor: SHAW RICHARD ELLIOTT
IPC: C09D5/12
Filed: 1959-05-06
Abstract: A metal-coating composition comprises a volatile organic solvent having dissolved therein phosphoric acid and an organic film-forming resin or polymer, there being at least one part by weight of phosphoric acid to every five parts by weight of film-former.  The phosphoric acid and film-former should not exceed 22% by weight of the composition, the latter ingredient preferably ranging from 0.5-18%.  Exemplified film-formers are p-tert phenol formaldehyde, urea formaldehyde, melamine formaldehyde, epoxy/phenol formaldehyde, 70:20:10 vinyl toluene/ethyl acrylate/acrylic acid co-polymer, 70:20:10, 70:5:20, 80:10:10 and 85:10:5 butyl methacrylate/methyl methacylate/methacrylic acid co-polymers, 80:20 butyl methacrylate/methyl methacrylate co-polymer, polystyrene, ethyl cellulose, coconut oil glycerol phthalate alkyd resin, epoxy ester, linseed oil and epoxide resin, vinyl chloride/vinyl acetate/vinyl alcohol co-polymer, and polyyinyl chloride/vinyl isobutyl ether co-polymer.  Specified solvents (used in various combinations) are ethylene glycol monobutyl and isopropyl ether, methyl ethyl ketone, acetone, butanol, isopropyl alcohol, xylol, toluene, trimethyl benzene, white spirit, pine oil and dioxan. The resulting coating may be air-dried or force-dried, and heat treatment may also be employed to cure the organic film.  If desired, the organic film may subsequently be removed by treatment with an organic solvent such as trichloroethylene. Metal surfaces which may be coated include steel, galvanised iron and aluminium. The coatings are stated to receive paint, and to facilitate the pressing and drawing of metals upon which they are formed.  If severe drawing is to be effected, the coating composition may advantageously contain a lubricant such as tallow, a hydrocarbon or vegetable oil, stearic acid, chlorinated paraffin wax, an organic sulphide, graphite or molybdenum sulphide. Coated metals may also be spot- or seam-welded.ALSO:A phosphating composition comprises a volatile organic liquid having dissolved therein phosphoric acid and an organic film-forming resin or polymer, there being at least one part by weight of phosphoric acid to every five parts by weight of film-former.  The phosphoric acid and film-former should not exceed 22% by weight of the composition, the latter ingredient preferably ranging from 0.5-18%.  Exemplified film-formers are p-tert. phenol formaldehyde, urea formaldehyde, melamine formaldehyde, epoxy-phenol formaldehyde, 70:20:10 vinyl toluene/ethyl acrylate/acrylic acid copolymer, 70:20:10, 75:5:20, 80:10:10 and 85:10:5 butyl methacrylate/methyl methacrylate/methacrylic acid copolymers, 80:20 butyl methacrylate/methyl methacrylate copolymer, polystyrene, ethyl cellulose, coconut oil glycerol phthalate alkyd resin, epoxy ester, linseed oil and epoxide resin, vinyl chloride/vinyl acetate/vinyl alcohol copolymer, and polyvinyl chloride/vinyl isobutyl ether copolymer.  Specified organic liquids (used in various combinations) are ethylene glycol monobutyl and isopropyl ether, methyl ethyl ketone, acetone, butanol, isopropyl alcohol xylol, toluene, trimethyl benzene, white spirit, pine oil and dioxan.  The composition may be applied to the metal surface by brushing, spraying, flowing, dipping or roller coating. The resulting coating may be air-dried or force-dried, and heat treatment may also be employed to cure the organic film.  If desired, the organic film may subsequently be removed by treatment with an organic solvent such as tri-chlorethylene. Metal surfaces which may be coated include steel, galvanised iron and aluminium. The coatings are stated to receive paint, and to facilitate the pressing, wire-drawing, tube-drawing or deep-drawing of metals upon which they are formed.  If severe drawing is to be effected, the coating composition may advantageously contain a lubricant such as tallow, a hydrocarbon or vegetable oil, stearic acid, chlorinated paraffin wax, an organic sulphide, graphite of molybdenum sulphide.  Coated metals may also be spot- or seam-welded.ALSO:A metal-coating composition comprises a volatile organic solvent having dissolved therein phosphoric acid and an organic film-forming resin or polymer, there being at least one part by weight of phosphoric acid to every five parts by weight of film-former.  The phosphoric acid and film-former should not exceed 22% by weight of the composition, the latter ingredient preferably ranging from 0,5-18%.  Exemplified film-formers are p-tert. phenol formaldehyde, urea formaldehyde, melamine formaldehyde, epoxy/phenol formaldehyde, 70 : 20 : 10 vinyl toluene/ethyl acrylate/acrylic acid copolymer, 70 : 20 : 10, 75 : 5 : 20, 80 : 10 : 10 and 85 : 10 : 5 butyl methacrylate/methyl methacrylate/methacrylic acid copolymer, 80 : 20 butyl methacrylate/methyl methacrylate copolymer, polystyrene, ethyl cellulose, coconut oil glycerol phthalate alkyd resin, epoxy ester, linseed oil and epoxide ersin, vinyl chloride/vinyl acetate/vinyl alcohol copolymer, and polyvinyl chloride /vinyl isobutyl ether copolymer.  Specified solvents (used in various combinations) are ethylene glycol monobutyl and isopropyl ether, methyl ethyl ketone, acetone, butanol, isopropyl alcohol, xylol, toluene, trimethyl benzene, white spirit, pine oil and dioxan. The composition may be applied to the surface of metal sheets by brushing, spraying, flowing, dipping, or roller coating.  The resulting coating may be air-dried or force-dried, and heat treatment may also be employed to cure the organic film.  A further resinous coating may then be applied.  Metal surfaces which may be coated include steel, galvanized iron and aluminium. The coatings are stated to receive paint, and to facilitate the pressing and drawing of metals upon which they are formed.  If severe drawing is to be effected, the coating composition may advantageously contain a lubricant such as tallow a hydrocarbon or vegetable oil, stearic acid, chlorinated paraffin wax, an organic sulphide, graphite or molybdenum sulphide.  Coated metals may also be spot- or seam-welded.