Overprinting of dye colored poly(vinyl chloride) resins
AssigneeFormulabs Industrial Inks, Inc.
InventorThomas D. Ryan
Life of this patent
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Abstract
The invention is directed to overprinting a poly(vinyl chloride) resin substrate whose surface, or portion thereof, is colored by solvent soluble dye or by way of a mass solvent soluble dye, with a coloring agent made up of a liquid halogenated hydrocarbon solvent having 1-4 carbon atoms, pigment dispersed in said halohydrocarbon solvent, and a film former, dissolved in said halohydrocarbon solvent, consisting essentially of (a) acrylic resin or (b) a combination of acrylic resin and chlorinated polyolefin, at least 50% by weight of acrylic resin; and heat treating said overprinted substrate to adhere said film former and associated pigment.
Claims10
In the process of overprinting on poly(vinyl chloride) resin substrate colored by solvent soluble dye present within said poly(vinyl chloride) resin mass or deposited on the surface of said poly(vinyl chloride) resin, the improvement which comprises:
- overprinting at least a part of the surface of said dye colored poly(vinyl chloride) resin substrate with a liquid, nonflammable coloring agent consisting essentially of
- (i) liquid, nonflammable, halogenated hydrocarbon solvent having 1-4 carbon atoms, where halo is chloro, fluoro, or both;
- (ii) pigment dispersed in said halohydrocarbon solvent;
- and
- (iii) film former, dissolved in said halohydrocarbon solvent consisting essentially of
- (a) a resin selected from the class consisting of acrylic resins, methacrylic resins, and resin copolymers or acrylates and methacrylates;
- or
- (b) a combination of said resin defined in (a) above and isotactic chlorinated polypropylene, said combination having at least 50% by weight of said resin defined in (a) above;
- for a time to color said substrate surface;
- and heat treating said overprinted substrate to adhere said pigment and said film former, in the overprinted area.
A process for overprinting a substrate formed from dye colored poly(vinyl chloride) resin capable of electrical insulation use, which process comprises:
- (1) contacting the surface area of said poly(vinyl chloride) resin with an ink consisting essentially of liquid, nonflammable, halogenated hydrocarbon solvent having 1-2 carbon atoms where halogen is chloro, fluoro, or both and dye dissolved in said ink solvent;
- (2) at about room temperature, for a time sufficient to color said poly(vinyl chloride) resin surface area;
- and
- (3) removing residual solvent from said poly(vinyl chloride) resin surface area to obtain a solid dye colored surface area;
- and
- II
- (A) overprinting said dye colored surface with a liquid, nonflammable coloring agent consisting essentially of
- (i) liquid chloroethane or chloroethylene, each having at least 3 chloro atoms, solvent;
- (ii) pigment dispersed in said chlorosolvent;
- and
- (iii) film former, dissolved in said chlorosolvent, consisting essentially of
- (a) a resin selected from the class consisting of acrylic resins, methacrylic resins, and resin copolymers of acrylates and methacrylates;
- or
- (b) a combination of said resin defined in (a) above and isotactic chlorinated polypropylene, said combination having at least 50% by weight of said resin defined in (a) above;
- (B) for a time to color said overprinted area;
- and
- (C) heat treating said overprinted substrate to adhere said pigment and said film former, in the overprinted area.
Dependencies are inferred from the claim text.