Patent ID: 6541560
Filing Date: 2003-04-01
Classification: B41M,B41N,Y10T

Abstract:
A overcoat solution used to form a finish coating in a printed structure, comprising a reactive chemistry on the substrate for reaction with carbonyl compounds, the solution comprising:(a) a major proportion of an aqueous medium; (b) a water soluble polymer, capable of forming a finish coating, in an amount from about 10 to about 80 wt % of the solution; and (c) a sufficient amount of a reactive compound comprising a hydrazide comprising a benzoic hydrazide, an oxalic hydrazide, a nicotinic hydrazide, methyl carbazate, ethyl carbazate, t-butyl carbazate or mixtures thereof, the compound having an H2Nâ€” group that can react with aldehyde or ketone to give a >C&boxH;Nâ€” group after the aqueous medium dries to form a coating, to substantially reduce the release of the carbonyl compound from the printed structure.