Thermal transfer of pyridone dyes

US5545235A · kind A · utility

Assignee

• BASF SE

Inventors

• Rudiger Sens · Ludwigshafen, DE
• Karl-Heinz Etzbach · Bischofswerda, DE

Key dates

• Filing date: Apr 19, 1995
• Grant date: Aug 13, 1996
• Expiry date: Apr 19, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41M5/39
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

A process for transferring dyes from a transfer to plastic-coated paper by diffusion or sublimation with the aid of an energy source comprises using a transfer on which there is or are one or more pyridone dyes of the formula ##STR1## where X is nitrogen or CH, PA1 R.sup.1 and R.sup.2 are each substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl, C.sub.3 -C.sub.4 -alkenyl or substituted or unsubstituted phenyl, or R.sup.1 and R.sup.2 are together with the nitrogen atom joining them together a heterocyclic radical, PA1 R.sup.3 is C.sub.3 -C.sub.10 -alkyl or C.sub.5 -C.sub.7 -cycloalkyl, PA1 R.sup.4 is hydrogen, C.sub.1 -C.sub.4 -alkyl or substituted or unsubstituted phenyl, PA1 R.sup.5 is cyano, substituted or unsubstituted carbamoyl, carboxyl, C.sub.1 -C.sub.8 -alkoxycarbonyl or benzimidazolyl, and PA1 R.sup.6 is substituted or unsubstituted C.sub.1 -C.sub.10 -alkyl, C.sub.5 -C.sub.7 -cycloalkyl or substituted or unsubstituted phenyl.