Water-insoluble sulphur dyes, their preparation and use

US5368637A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Wolfgang Bauer · Krefeld, DE
• Willi Steckelberg · Hofheim, DE
• Josef Ritter · Graz, AT
• Wilhelm Mauelshagen · Bad Camberg, DE

Key dates

• Filing date: Nov 1, 1993
• Grant date: Nov 29, 1994
• Expiry date: Nov 1, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D11/328
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The water-insoluble sulphur dyes of the general formula I ##STR1## in which F is a dye chromophore of, for example, C.I. Sulphur Black 1 and R.sup.1 to R.sup.4 and n are as defined in Claim 1, are suitable in particular for producing recording fluids.