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Water based printing inks for plastic and metal surfaces

  • US 4,762,875 A
  • Filed: 02/17/1987
  • Issued: 08/09/1988
  • Est. Priority Date: 03/26/1984
  • Status: Expired due to Fees
First Claim
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1. A water based dispersion system for coating non-magnetic pigment particles onto a substrate comprising:

  • water sufficient to form a dispersion, at least one adhesive plasticizer (Additive A), at least one adhesive polymer (Additive B), at least one surface active agent, and optionally a dispersing agent, at least one polymeric latex capable of binding pigment particles into a coating, wherein Additive A is of the general formula
    
    
    space="preserve" listing-type="equation">Y--CO--NX--CH.sub.2 --Q and Y is selected from the group consisting of H, an akyl group of C1 -C4, an alkylene group of C2 -C3, an ethanol, propanol or isopropanol group, a 2-3 carbon ether group, and a C1 -C3 haloalkyl group, said halo selected from the group consisting of being chloro or fluoro, wherein X is H or CH3, and Q is selected from the group consisting of moieties of polyhydroxybenzene compounds, substituted or unsubstituted ortho, meta and para aminophenols and aromatic diamines,and wherein Additive B is a water soluble or dispersible polymer which was formed by the copolymerization of a first component which has at least 5% of its monomer constitutents being derived from a monomer selected from the group consisting of acrylamide and methacrylamide, and the balance being a second component of one or more vinyl monomers copolymerizable with said first component, thereby having yielded an amido copolymerizate,said amido copolymerizate having been further condensed with formaldehyde to the extent of from 5% to 95% of the amide groups, said condensed amido copolymerizate having been still further condensed with a member selected from the group consisting of a polyhydroxy aromatic compound, an amino hydroxy aromatic compound, or a diamino aromatic compound, andsufficient non-magnetic pigment particles of a size suitable for forming a dispersion, and compatible with the said polymeric latex.

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