Dye acceptor element for thermosublimation printing
AssigneeAgfa-Gevaert
InventorsRolf Wehrmann, Geert Defieuw, Emil Verdonck, Herman Uytterhoeven, Rolf Dheim, Walter Schafer
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Abstract
Dye transfers of high color density, excellent sharpness and good stability are obtained in thermosublimation printing using a dye acceptor layer consisting essentially of a polyurethane formed by crosslinking and characterized in that the polyurethane contains at least 5% by weight urethane groups (--O--CO--NH--).
Claims6
A thermosublimation printing dye acceptor element in combination with a sheet-form or web-form donor material containing a sublimatable dye, said dye acceptor element comprising a support and, coated thereon, a dye acceptor layer consisting essentially of a polyurethane formed by crosslinking, wherein the polyurethane has been formed from a polymer that contains hydroxyl groups by crosslinking said polymer with a polyisocyanate, said polymer being selected from the group consisting of
- a) polyethers;
- b) polyesters;
- c) polymers containing polymerized acrylate monomers;
- and
- d) polymers containing polymerized monomers selected from the group consisting of vinyl acetate, vinyl butyral, maleic acid, dibutyl maleate, crotonic acid, vinyl laurate, acrylonitrile and ethylene,
- and the polyurethane contains at least 4% by weight urethane groups (--O--CO--NH--).
Dependencies are inferred from the claim text.