OVERCOAT COMPOSITION FOR PRINTED IMAGES

This invention relates to a substantially colorless ink or overcoat composition comprising an aqueous medium and a polyurethane polymer that has an acid number of 60 to 100 and a weight average molecular weight of greater than 10,000. It particularly relates to an ink jet ink comprising said colorle...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KRZEMIEN, WENDY, SUSAN, YACOBUCCI, PAUL, DANIEL, FALKNER, CATHERINE, ANN, YAU, HWEI-LING, UERZ, DAVID, SCOTT
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	This invention relates to a substantially colorless ink or overcoat composition comprising an aqueous medium and a polyurethane polymer that has an acid number of 60 to 100 and a weight average molecular weight of greater than 10,000. It particularly relates to an ink jet ink comprising said colorless ink composition. L'invention concerne une encre sensiblement incolore ou une composition de revêtement comprenant un milieu aqueux et un polymère de polyuréthanne ayant un indice d'acide de 60 à 100 et un poids moléculaire moyen en poids supérieur à 10.000. L'invention concerne en particulier une encre pour jet d'encre comprenant ladite composition d'encre incolore.