Transfer of azo dyes having a pyridine coupling component

US4939118A · kind A · utility

Assignee

• BASF SE

Inventors

• Karl-Heinz Etzbach · Bischofswerda, DE
• Gunther Lamm · Haßloch, DE
• Hermann Loeffler · Speyer, DE
• Helmut Reichelt · Neustadt, DE
• Ruediger Sens · Mannheim, DE

Key dates

• Filing date: Jun 12, 1989
• Grant date: Jul 3, 1990
• Expiry date: Jun 12, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/914
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyes are transferred from a substrate to a plastic-coated paper by diffusion with the aid of a thermal printing head, these azo dyes having the formula ##STR1## where D is the radical of a diazo component and PA0 R.sup.1, R.sup.2 and R.sup.3 are each independently of the others hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted phenyl or substituted or unsubstituted cyclohexyl and PA0 R.sup.4 is alkyl.