Patent GB-853218-A (GB)
Title: Preparation of pigmented coating compositions
IPC: C09D101/18
Filed: 1959-03-26
Abstract: A pigment composition, suitable for incorporation in protective and decorative vinyl resin or cellulose derivative p  coating compositions without grinding, comprises an organic or inorganic pigment and a paste-forming amount of a pyrrolidone compound of the formula:  <FORM:0853218/IV(a)/1> in which R represents a hydrogen atom or an alkyl or alkenyl radical of 1-4 carbon atoms, specified compounds being 2-pyrrolidone and N-methyl-, N-ethyl-, N-isopropyl-, N-butyl- and N-vinyl-2-pyrrolidone.  The pigment composition may be incorporated in vinyl resin lacquers, cellulose nitrate or cellulose acetate lacquers, aqueous emulsions of artificial latex and aqueous solutions of water-soluble binders for water paints such as methyl cellulose, carboxy methyl cellulose or polyvinyl alcohol, and the pigment composition may be diluted with a solvent prior to incorporation.  In examples, the pigment composition is added to (1) a nitrocellulose lacquer containing glycerol-phthalate alkyd resin, ethanol, butanol, ethyl acetate, butyl acetate, xylol and dibutyl phthalate and the lacquer then coated on to an aluminium foil, and (v) a vinyl lacquer containing vinyl chloride-vinylacetate copolymer, methylisobutyl-ketone, methyl-n-amylketone and toluene and the lacquer then coated on to an aluminium foil.  A large number of pigments were used which were mostly organic but which also included ferric oxide and lead chromate molybdate.ALSO:A pigment composition, suitable for incorporation in protective and decorative coating compositions without grinding, comprises an organic or inorganic pigment and a paste-forming amount of a pyrrolidone compound of the formula:  <FORM:0853218/IV (c)/1> in which R represents a hydrogen atom or an alkyl or alkenyl radical of 1-4 carbon atoms, specified compounds being 2-pyrrolidone and N-methyl-, N-ethyl-, N-isopropyl-, N- butyl- and N-vinyl -2- pyrrolidone.  The pigment composition may be incorporated in spirit lacquers, varnishes, alkyd solvent type paints, vinyl resin lacquers, cellulose nitrate or cellulose acetate lacquers, aqueous emulsions of natural or artificial latex and aqueous solutions of water soluble binders for water paints such as glue, casein, methyl cellulose, carboxymethylcellulose or polyvinyl alcohol, and the pigment composition may be diluted with a solvent prior to incorporation. In examples the pigment composition is added to (1) a nitrocellulose lacquer containing glycerol-phthalate alkyd resin, ethanol, butanol, ethyl acetate, butyl acetate, xylol and dibutyl phthalate and the lacquer then coated on to an aluminium foil, and (2) a vinyl lacquer containing vinyl chloride-vinylacetate copolymer, methylisobutyl-ketone, methyl -n-amylketone and toluene and the lacquer then coated on to an aluminium foil.ALSO:A pigment composition, suitable for incorporation in protective and decorative coating compositions without grinding, comprises an organic or inorganic pigment and a paste-forming amount of a pyrrolidone compound of the formula:  <FORM:0853218/III/1> in which R represents a hydrogen atom or an alkyl or alkenyl radical of 1-4 carbon atoms, specified compounds being 2-pyrrolidone and N-methyl-, N-ethyl-, N-isopropyl-, N-butyl-and N-vinyl-2-pyrrolidone.  The pigment composition may be incorporated in spirit lacquers, varnishes, alkyd solvent type paints, vinyl resin lacquers, cellulose nitrate or cellulose acetate lacquers, aqueous emulsions of natural or artificial latex and aqueous solutions of water soluble binders for water paints such as glue, casein, methyl cellulose, carboxy methyl cellulose or polyvinyl alcohol, and the pigment composition may be diluted with a solvent prior to incorporation.  In examples, the pigment composition is added to (1) a nitrocellulose lacquer containing glycerol-phthalate alkyd resin, ethanol, butanol, ethyl acetate, butyl acetate, xylol and dibutyl phthalate and the lacquer then coated on to an aluminium foil, and (2) a vinyl lacquer containing vinyl chloride-vinylacetate copolymer, methylisobutyl-ketone, methyl-n-amylketone and toluene and the lacquer then coated on to an aluminium foil.