| 摘要 |
Dye-donor element for thermal dye recording comprising a dye layer comprising a dye and leuco-indoaniline dye as a light-stabilizer. The leuco-indoaniline dye is preferably a compound according to the formula: <IMAGE> wherein R1 is H or any substituent, n is 0-4 each of R2 and R3 (same or different) is H or acyl, X is 0 or represents atoms completing a ring (system), each of R4, R5, R6, and R7 (same or different) is H, (cyclo)alkyl, aryl, alkyloxy, aryloxy, carbamoyl, sulphamoyl, -OH, halogen, -NH-SO2R12, -NH-COR12, -O-SO2R12, or -O-COR12, or R4 and R7 together and R5 and R6 together represent the atoms completing a ring (system), or R4 and R8 and/or R5 and R9 together and R5 and R6 together represent the atoms completing a heterocyclic nucleus, each of R8 and R9 (same or different) is H, (cyclo)alkyl, aryl, a heterocyclic nucleus, or R8 and R9 together represent the atoms completing a heterocyclic nucleus, each of R10, R11, and R12 (same or different) represents (cyclo)alkyl group, alkenyl, aryl, alkyloxy, aryloxy, alkylthio, arylthio, amino, or a heterocyclic nucleus.
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