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Hot melt flexographic inks and method of preparing same

  • US 20030149134A1
  • Filed: 12/28/2001
  • Published: 08/07/2003
  • Est. Priority Date: 12/28/2001
  • Status: Active Grant
First Claim
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1. A solvent-free, flexographic printing ink which is solid at room temperature, the ink consisting essentially of:

  • (A) a pigment;

    (B) a thermoplastic binder selected from the group consisting of an ethylene copolymer, a hydrocarbon resin, and a combination thereof;

    (C) a wax selected from the group consisting of a highly branched hydrocarbon wax, a polyethylene homopolymer wax, an oxidized polyethylene wax, an animal wax, a vegetable wax and combinations thereof;

    (D) a solid linear alcohol at room temperature; and

    , (E) a dispersing agent; and

    , optionally, (F) a solid plasticizer;

    wherein, the ink has a melting point of about 75°

    C. or greater, and when heated to a temperature between about 90°

    C. and about 135°

    C., forms a molten ink which has a viscosity between about 100 cps and about 1200 cps.

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