Azo dyes with an acetalized diazo component of the thiophene or thiazole series

US5502170A · kind A · utility

Assignee

• BASF SE

Inventors

• Sabine Gruettner-Merten · Mutterstadt, DE
• Helmut Reichelt · Neustadt, DE
• Arno Lange · Bad Dürkheim, DE
• Helmut Degen · Bischofswerda, DE

Key dates

• Filing date: May 17, 1995
• Grant date: Mar 26, 1996
• Expiry date: May 17, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/0085
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyes of the formula ##STR1## where L.sup.1, L.sup.2, L.sup.3, L.sup.4, X and K are as defined in the specification, and crystal forms of thienylazobenzene dyes are useful for dyeing or printing textile materials such as polyesters, fibers or fabrics made of cellulose esters or polyamides or blend fabrics from polyester and cellulose fibers with high color strength, good fastness properties and brilliant hues.