Patent ID: 6057264
Filing Date: 2000-05-02
Classification: B41M,Y10S

Abstract:
A dye diffusion thermal transfer printing process comprisingcontacting a transfer sheet comprising a coating comprising a binder and a dye or mixture of dyes of Formula (1) ##STR62## wherein R.sup.1 is alkyl, cycloalkyl, aryl, alkenyl or aralkyl each of which may be optionally substituted;R.sup.2 and R.sup.3 each independently is an optionally substituted alkyl;R.sup.4 is --H, --OH or alkyl, alkoxy, --NHCOalkyl, --NHCOaryl, --NHSO.sub.2 alkyl, --NHSO.sub.2 aryl each of which may be optionally substituted;Z is a direct link, oxygen or --N--R.sup.5 in which R.sup.5 is --H, optionally substituted alkyl or optionally substituted aryl;A is a group of Formula (2):B--N=N-- Formula (2)in which B is an isothiazolyl group which may be optionally substituted with a member of the group consisting of --NO.sub.2, --CN, --OH, --Cl, --F, --Br, --SCN, phenyl, alkyl, alkoxy, alkylthio, alkoxyalkoxy, alkylcarbonyl, alkoxycarbonyl, alkylalkoxycarbonyl, alkoxyalkoxycarbonyl, alkoxycarbonyloxy, phenoxylalkyl, phenylalkyl, alkylcarbonyloxy, alkoxyalkoxycarbonyloxy, phenoxylalkoxycarbonyl, --NR.sup.8 R.sup.9, --COR.sup.8, --CO.sub.2 R.sup.8, in which R.sup.8 and R.sup.9 are each independently H or any of the groups given for R.sup.1, --NHCOalkyl and --NHSO.sub.2 alkyl;with a receiver sheet andselectively applying heat to discrete areas on the reverse side of the transfer sheet whereby the dye on the opposite side of the sheet to the heated areas is transferred to the receiver sheet.