Azo dyes with an N-substituted 2-hydroxy-3-cyano-4-methyl pyrridone-6-coupling component

US4133806A · kind A · utility

Assignee

• BASF SE

Inventor

• Gerhard Gnad · Keltern, DE

Key dates

• Filing date: Jun 3, 1974
• Grant date: Jan 9, 1979
• Expiry date: Jun 3, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B31/153
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyes represented by the formula ##STR1## in which R.sup.2 represents alkyl of 1 to 4 carbon atoms or may also represent ethyl or propyl substituted by hydroxy or alkoxy of 1 to 4 carbon atoms, and R.sup.3 is C.sub.4 H.sub.9 --, CH.sub.3 OCH.sub.2 CH.sub.2 --, CH.sub.3 (CH.sub.2).sub.4 --, CH.sub.3 (CH.sub.2).sub.5 --, CH.sub.3 (CH.sub.2).sub.7 --, ##STR2## or cycloalkyl of 5 to 8 carbon atoms. These dyes have excellent fastness properties and are especially useful for dyeing cellulose ester and polyester fibrous materials.