| 摘要 |
THERMAL PRINT ELEMENT COMPRISING A YELLOW MEROCYANINE DYE STABILIZED WITH A CYAN INDOANILINE DYE A thermal print element comprising a support having thereon a layer containing a thermally-transferred dye image, the dye image comprising a yellow merocyanine dye having the formula: wherein: A represents -COR, -COOR, -CONHR, -CN, -SO2R or -SO2NR2; or A may be combined together with R4 to form a heterocyclic or carbocyclic ring system; R4 represents -NHR, -NR2, -OR, -SR, or -R; n represents 0 or 1; Y represents the atoms necessary to complete 5- or 6-membered substituted or unsubstituted heterocyclic ring; and each R independently represents a substituted or unsubstituted alkyl or aryl group; the dye image also comprising a cyan indoaniline dye in the same areas as the yellow merocyanine dye to provide improved stability to light for the yellow merocyanine dye, the cyan indoaniline dye having the formula: wherein R1 and R2 are each independently hydrogen or a substituted or unsubstituted alkyl, cycloalkyl, or aryl group; R3 is hydrogen, a substituted or unsubstituted alkyl group, halogen, -NHCOR1 or -NHSO2R1; and X represents hydrogen or the atoms necessary to complete a 5- or 6-membered, substituted or unsubstituted, carbocyclic or heterocyclic ring system. |
