Azo dyes

US9023118B2 · kind B2 · utility

Assignee

• KEMIRA OYJ · FI

Inventors

• Helmut-Martin Meier · Ratingen, DE
• Christof Heide · Bensberg, DE
• Klaus-Günter Strumpf · Leverkusen, DE
• Thomas Hübbe · Cologne, DE

Key dates

• Filing date: Nov 29, 2011
• Grant date: May 5, 2015
• Expiry date: Nov 29, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/924
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to new azo dyes, a process for their preparation, and their use for dyeing or printing fibrous materials, to produce materials with brownish shades.