Azamethine dyes

US5811370A · kind A · utility

Assignee

• BASF SE

Inventors

• Rudiger Sens · Ludwigshafen, DE
• Andreas Schmidt · Schwarzheide, DE
• Stefan Beckmann · Mannheim, DE
• Karl-Heinz Etzbach · Bischofswerda, DE

Key dates

• Filing date: May 8, 1997
• Grant date: Sep 22, 1998
• Expiry date: May 8, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B55/009
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azamethine dyes of the formula ##STR1## where W is oxygen, sulfur or a radical of the formula --NH--CO--, --NH--COO-- oder --NH--SO.sub.2 --, PA1 Z.sup.1 is C.sub.1 -C.sub.4 -alkyl with or without substitution, phenyl or C.sub.1 -C.sub.4 -alkoxy, PA1 Z.sup.2 and Z.sup.3 are each hydrogen or C.sub.1 -C.sub.4 -alkyl with or without substitution, provided --CZ.sup.1 Z.sup.2 Z.sup.3 is not linear and is not isopropyl, PA1 Z.sup.4 is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, PA1 Z.sup.5 and Z.sup.6 are each C.sub.1 -C.sub.10 -alkyl with or without substitution, C.sub.3 -C.sub.4 -alkenyl, C.sub.5 -C.sub.7 -cycloalkyl, phenyl or tolyl, or together with the nitrogen atom joining them together a heterocyclic radical or Z.sup.4 and Z.sup.5 are together a bridge member, and PA1 T is a radical of a cyclic acidic--CH compound H.sub.2 T, are useful for thermal transfer.