Transferring dyes for thermal printing: tri-cyano-vinyl aniline

Details Transferring dyes for thermal printing: tri-cyano-vinyl aniline Transferring dyes for thermal printing: tri-cyano-vinyl aniline

1989-07-24

1991-03-12

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

Diffusion transfer dyeing process, transfer sheet and product

Dry heat treatment for penetration

8467, 8662, 8922, 8636, B41M 526, C09B 2314, C09B 2903

Patent

active

049990268

ABSTRACT:
Dyes are transferred from a carrier by sublimation/vaporization to plastic-coated papers by a process in which the dyes used are of the general formula (I) ##STR1## where A is D--N.dbd.N-- or ##STR2## R.sup.1 and R.sup.2 are each hydrogen, alkyl, alkoxy, alkylthio or halogen and R.sup.1 and R together may furthermore form a 5-membered or 6-membered heterocyclic ring, and R and R' independently of one another are each hydrogen, phenyl which is unsubstituted or substituted by methyl or methoxy, or C.sub.5 - or C.sub.6 -cycloalkyl or C.sub.1 -C.sub.6 -alkyl which is unsubstituted or substituted by C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkoxycarbonyl, C.sub.2 -C.sub.5 -alkanoyloxy, C.sub.1 -C.sub.4 -alkoxycarbonyloxy, C.sub.1 -C.sub.4 -alkoxy-C.sub.2 -or C.sub.3 -alkoxycarbonyloxy, hydroxyl, cyano, halogen, phenyl or C.sub.5 - or C.sub.6 -cycloalkyl, or ##STR3## is a 5-membered or 6-membered saturated heterocyclic ring where D is a radical of a diazo component of the thiophene, thiazole, isothiazole or 1,2,4-thiadiazole series and R.sup.3 is hydrogen or CN.
In the process, the dyes (I) give strong dyeings which have good light fastness and are resistant to chemical substances.

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