Process for improving the light fastness of polyamide dyeings

US4544372A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Klaus-Peter Heise · Bensberg, DE
• Robert Kuth · Cologne, DE
• Karl Neufang · Cologne, DE
• Hellmuth Pantke · Leichlingen, DE
• Karlfried Wedemeyer · Cologne, DE

Key dates

• Filing date: Dec 2, 1983
• Grant date: Oct 1, 1985
• Expiry date: Dec 2, 2003

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D06P5/02
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The light fastness of dyed polyamide fibre materials, in particular of the type used for manufacturing car seat covers, can be substantially improved by treating these materials, before, during or after the dyeing, with copper compounds of the compounds of the formula ##STR1## wherein R=H, OH, alkyl or cycloalkyl. The compounds (I) are distinguished by low self-colour and good stability to acid conditions.