Oxadiazolyl-benzene azo hydroxy-pyridone dyes for thermal transf

Details Oxadiazolyl-benzene azo hydroxy-pyridone dyes for thermal transf Oxadiazolyl-benzene azo hydroxy-pyridone dyes for thermal transf

1990-09-28

1992-03-03

Clingman, A. Lionel

Record receiver having plural interactive leaves or a colorless

Having plural interactive leaves

428195, 428412, 428480, 428913, 428914, 8471, 534770, 534775, B41M 538, D06P 513

Patent

active

050933086

ABSTRACT:
Azo dyes useful for thermotransfer printing have the formula ##STR1## where R.sup.1 and R.sup.2 are each H; alkyl, alkoxyalkyl, alkanoyloxyalkyl, alkoxycarbonyloxyalkyl, alkoxycarbonylalkyl, haloalkyl, hydroxyalkyl or cyanoalkyl each of up to 20 carbon atoms and each of which may be substituted by phenyl, C.sub.1 -C.sub.4 -alkylphenyl, C.sub.1 -C.sub.4 -alkoxyphenyl, halophenyl, benzyloxy, C.sub.1 -C.sub.4 -alkylbenzyloxy, C.sub.1 -C.sub.4 -alkoxybenzyloxy, halobenzyloxy, halogen, hydroxyl or cyano; phenyl or cyclohexyl which may each be substituted by C.sub.1 -C.sub.15 -alkyl, C.sub.1 -C.sub.15 -alkoxy, halogen or benzyloxy; or a radical II

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