Patent GB-1016534-A (GB)
Title: Improvements in pigment materials and in processes for their production
Inventor: LAVELL HUGH HENRY
IPC: B60C9/06
Filed: 1962-08-29
Abstract: Fluorescent pigment materials consist of vinyl polymer particles dyed with a fluorescent dye and having adsorbed thereon or absorbed therein a vinyl stabilizer selected from inorganic and organic bases of low volatility, epoxy compounds, barium, cadmium and tin salts of fatty acids having a chain length of at least 8 carbon atoms and metal salts of saturated fatty acids having a chain length of at least 8 carbon atoms.  The particles may also have absorbed or adsorbed a resin or further polymer, a wetting agent or an ultra-violet light absorbent.  In examples particulate polyvinyl chloride is dyed with red fluorescent dye and treated with (I) dibutyl tin dilaurate; (II) an ethyl acrylate/methyl methacrylate copolymer emulsion and dibutyl tin dilaurate; (III) urea/formaldehyde, melamine/formaldehyde and epoxy resins and a nonyl phenol/ethylene oxide condensate; (IV) dibutyl tin dilaurate and a nonyl phenol/ethylene acido condensate; (VI) a styrene/butadiene copolymer latex, barium/cadmium laurate and 2 - hydroxy - 4 - methoxy - 5 - suphobenzaldehyde or U.V. light stabilizer, together with (V) coco amine acetate; (VII) nonyl pheno/ethylene oxide condensate, dibutyltin di-(isooctyl thioglycollate) and U.V. light stabilizer; (VIII) isooctyl epoxystearate and U.V. light stabilizer; (IX) styrene/butadiene copolymer latex, nonyl phenol/ethylene oxide condensate and barium/cadmium stearate. Example II was repeated using polyvinyl chloride dyed with (X) yellow dye fluorescing greenish yellow, (XI) red dye fluorescing orange and (XII) orange dye fluorescing orange-yellow, and using a vinyl chloride/vinyl acetate/vinyl alcohol terpolymer dyed with red dye.  The pigments are incorporated in (XIV) an alkyd resin/whole spirit ink vehicle, (XV) a methyl methacrylate/butyl methacrylate copolymer/xylene coating lacquer, (XVI) a plasticized polyvinyl acetate emulsion paint and (XVII) an ethyl cellulose/alcohol ink vehicle.ALSO:Pigment materials consisting of dyed vinyl polymer particles having adsorbed thereon or absorbed therein a vinyl stabilizer selected from inorganic and organic bases of low volatility, epoxy compounds, barium, cadmium and tin salts of fatty acids having a chain length of at least 8 carbon atoms, and metal salts of saturated fatty acids having a chain length of at least 8 carbon atoms, may be prepared by dyeing the polymer particles in an aqueous dye bath, treating the particles in the dyebath with the stabilizer, and drying the particles.  Preferred polymers are polyvinyl chloride and copolymers containing at least 70% vinyl chloride units.  The dye may be fluorescent. The dyed particles may be further treated with a resin or further polymer, a wetting agent or an ultra-violet light absorbent.  In examples particulate polyvinyl chloride is dyed with red fluorescent dye and treated with (I) dibutyl tin dilaurate; (II) an ethyl acrylate/methyl methacrylate copolymer emulsion and dibutyl tin dilaurate; (III) urea-formaldehyde resin, melamine-formaldehyde resin, nonylphenol-ethylene oxide condensate and an epichlorhydrin-bis phenol A condensate; (IV) nonylphenolethylene oxide condensate and dibutyl tin dilaurate; (VI) a styrene/butadiene copolymer latex containing dibutyl phthalate, polyethylene glycol monolaurate and a styrene/maleic anhydride copolymer, barium/cadmium laurate and 2 - hydroxy - 4 - methoxy - 5-sulphobenzophenone as U.V. light stabilizer, together with (V) coco amine acetate; (VII) nonyl phenol-ethulene oxide condensate, dibutyl tin di-(iso-octyl thioglycollate) and U.V. light stabilizer; (VIII) iso-octyl epoxystearate and U.V. light stabilizer; (IX) styrene/butadiene copolymer latex, nonylphenol/ethylene oxide condensate and barium/cadmium stearate. Example II was repeated using (X) yellow, (XI) orange and (XII) orange-yellow fluorescent dyes and (XIII) a vinyl chloride/vinyl acetate/vinyl alcohol terpolymer.  Further examples describe (XIV) an ink comprising a glycerol/phthalic anhydride/soya bean oil alkyd, white spirit, lead or calcium naphthenate and any of the pigments of I to XIII; coating compositions comprising (XV) a methyl methacrylate/butyl methacrylate copolymer, xylene and any of the pigments of I to XIII, or (XVI) a plasticized polyvinyl acetate emulsion and the pigment of II; and (XVII) an ink comprising ethyl cellulose, ethyl alcohol, 4-amino-1 : 8-napthalic acid-41-phenylanilide and the pigment of (X).