Thermal print element comprising a magenta 3-aryl-2-arylazo-5- aminothiazole or aminothiophene dye stabilized with a cyan indoaniline dye

摘要

A thermal print element comprising a support having thereon a layer containing a thermally-transferred dye image, the dye image comprising a magenta dye having the following formula: ##STR1## wherein: wherein R.sup. 1 and R.sup.2 are each independently hydrogen or a substituted or unsubstituted alkyl, cycloalkyl, or aryl group, or may be joined together to form a 5- or 6-membered, substituted or unsubstituted, heterocyclic ring system;PPR.sup.3 is a substituted or unsubstituted aryl group having from about 6 to about 10 carbon atoms; PP R.sup.4 represents at least one electron withdrawing group; ##STR2## R. sup.5 is hydrogen, alkoxycarbonyl, cyano, halogen, carbamoyl, acyl, alkylsulfonyl, arylsulfonyl, sulfamoyl or alkyl, or may represent the atoms necessary to join with R.sup.2 to form a 5- to 7-membered, substituted or unsubstituted, heterocyclic ring system;PP the dye image also comprising a cyan indoaniline dye in the same areas as the magenta dye to provide improved stability top light for the magenta dye, the cyan indoaniline dye having the formula: ##STR3## wherein: R.sup. 6 and R.sup.7 are each independently hydrogen or a substituted or unsubstituted alkyl, cycloalkyl, or aryl group;PPR.sup.8 represents hydrogen, a substituted or unsubstituted alkyl group, alkoxy, halogen, --NHCOR.sup.1 or --NHSO.sub.2 R.sup.1 ;PPR.sup.9 represents hydrogen or a substituted or unsubstituted alkyl, cycloalkyl, or aryl group, --CONHR.sup.6, --CN, --Cl, --NHCOR.sup.6, --NHCO.sub.2 R. sup.6, --NHCONHR.sup.6, --NHCON(R.sup.6). sub.2, --SO.sub.2 NHR.sup.6, -- NHSO.sub.2 R.sup.6, --SCN or ##STR4## Y represents a hydrogen or the atoms necessary to complete a 5- or 6-membered, substituted or unsubstituted, carbocyclic or heterocyclic ring system;PP n is 1-4; andPPn is 1-4.