Process for improving the light fastness of polyamide dyeings with copper complexes of schiff bases or ortho-hydroxy benzophenone

US4383835A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Reinhard Preuss · Krefeld, DE
• Joachim Grutze · Cologne, DE
• Ulrich Beck · Bornheim, DE
• Hellmuth Pantke · Leichlingen, DE
• Karl Vogel · Cologne, DE

Key dates

• Filing date: Oct 15, 1981
• Grant date: May 17, 1983
• Expiry date: Oct 15, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/924
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The light fastness of polyamide dyeings can be improved by treating polyamide fibre materials, before, during or after dyeing, with copper complexes of the reaction products of salicylaldehydes with amines (for example cyclohexylamine), or with copper complexes of o-hydroxybenzophenones.