Light-stabilizers for dyes for thermal dye transfer recording

Details Light-stabilizers for dyes for thermal dye transfer recording Light-stabilizers for dyes for thermal dye transfer recording

1994-05-02

1995-06-20

Hess, B. Hamilton

Record receiver having plural interactive leaves or a colorless

Having plural interactive leaves

428195, 428913, 428914, 430200, 430201, B41M 5035, B41M 538

Patent

active

054260884

ABSTRACT:
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: ##STR1## wherein R.sup.1 is H or any substituent, n is 0-4 each of R.sup.2 and R.sup.3 (same or different) is H or acyl, X is 0 or represents atoms completing a ring (system), each of R.sup.4, R.sup.5, R.sup.6, and R.sup.7 (same or different) is H, (cyclo)alkyl, aryl, alkyloxy, aryloxy, carbamoyl, sulphamoyl, --OH, halogen, --NH--SO.sub.2 R.sup.12, --NH--COR.sup.12, --O--SO.sub.2 R.sup.12, or --O--COR.sup.12, or R.sup.4 and R.sup.7 together and R.sup.5 and R.sup.6 together represent the atoms completing a ring (system), or R.sup.4 and R.sup.8 and/or R.sup.5 and R.sup.9 together and R.sup.5 and R.sup.6 together represent the atoms completing a heterocyclic nucleus, each of R.sup.8 and R.sup.9 (same or different) is H, (cyclo)alkyl, aryl, a heterocyclic nucleus, or R.sup.8 and R.sup.9 together represent the atoms completing a heterocyclic nucleus, each of R.sup.10, R.sup.11, and R.sup.12 (same or different) represents (cyclo)alkyl group, alkenyl, aryl, alkyloxy, aryloxy, alkylthio, arylthio, amino, or a heterocyclic nucleus.

REFERENCES:
patent: 4270480 (1988-01-01), Ito et al.
patent: 5112799 (1992-05-01), Egashira et al.
patent: 5217942 (1993-06-01), Oshima et al.
patent: 5254525 (1993-10-01), Nakajima et al.

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