Benzothioxanthene dyes, their preparation and their use

US5783710A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Wolfgang Bauer · Krefeld, DE
• Dieter Baumgart · Egelsbach, DE
• Walter Zoller · Dippoldiswalde, DE

Key dates

• Filing date: Mar 10, 1997
• Grant date: Jul 21, 1998
• Expiry date: Mar 10, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S260/38
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to benzothioxanthene dyes of the formula I, ##STR1## in which R.sup.1 is SO.sub.3.sup..crclbar. M.sup..sym. or SO.sub.2 NR.sup.4 R.sup.5, R.sup.2 and R.sup.3 independently of one another are hydrogen, SO.sub.3.sup..crclbar. M.sup..sym. or SO.sub.2 NR.sup.4 R.sup.5 and X, Y, n, R.sup.4, R.sup.5 and M.sup..sym. are as defined in claim 1, to their preparation and to their use, especially in inks and recording liquids.