Distyryl compounds

US4610807A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Brinkwerth · Wittlich, DE
• Udo Eckstein · Cologne, DE

Key dates

• Filing date: Oct 18, 1984
• Grant date: Sep 9, 1986
• Expiry date: Oct 18, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C25/18
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Distyryl compounds of the formula (I) ##STR1## wherein R.sup.1 denotes hydrogen, halogen, alkyl and the like, PA0 R.sup.2 denotes hydrogen, halogen, aryl, alkyl, aralkyl and the like, PA0 R.sup.3 denotes hydrogen, halogen, alkyl or CF.sub.3 and PA0 n denotes 1 or 2, are useful fluorescent brighteners which are distinguished by their low degree of self-coloring. They are particularly useful for application to polyester fibre materials by thermosoling.