Printing fluid additives promoting overcoat adhesion
AssigneeHewlett-Packard Development Company, L.P.
InventorGary Allan Ungefug
Life of this patent
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Abstract
A printing fluid composition with an additive which functions as a compatibilizer between the hydrophilic material coating a media surface and the hydrophobic thermal transfer overcoat (TTO) material used in a clear protective TTO overcoat and a method of using such an printing fluid composition to promote adhesion of such TTO material and a digitally printed medium.
Claims118
An printing fluid composition comprising an acrylic copolymer in an amount sufficient to promote adhesion of clear thermal transfer overcoat applied over an image printed with the printing fluid composition on media having a coating comprising hydrophilic material.
A method of using adhesion promoters in printing fluids to improve adhesion of clear thermal transfer overcoats to hydrophilic-material coated medium, comprising
- (a) printing an printing fluid composition comprising an acrylic copolymer additive onto a hydrophilic-material coated medium;
- and
- (b) applying a clear thermal transfer overcoat to the hydrophilic-material coated medium printed in step (a);
- wherein the acrylic copolymer additive in the printing fluid composition is in an amount sufficient to promote adhesion of clear thermal transfer overcoat applied over an image printed with the printing fluid composition.
The method of 64 wherein the A monomer is
- 33
- where
- R′3=H, halogen, alkyl, aryl or substituted alkyl or aryl;
- R′5 direct bond, O, or NH;
- and
- R′6=alkylene, arylene, substituted alkylene or arylene;
- and
- R9 and R10 are independently selected from H, alkyl, substituted alkyl, alkylaryl or substituted alkylaryl in which the length of alkyl and alkylaryl chains each comprise between 2 and 40 carbon atoms, or R9 and R10 together form a 5- or 6-membered ring.
Dependencies are inferred from the claim text.