Lightfastness of dyeings obtained with acid dyes or metal complex dyes on polyamides: treatment with copper hydroxamates

US4707161A · kind A · utility

Assignee

• BASF SE

Inventors

• Michael Thomas · Weisenheim am Berg, DE
• Peter Neumann · Wiesloch, DE
• Dieter Wegerle · Mannheim, DE
• Reinhold Krallmann · Bad Dürkheim, DE

Key dates

• Filing date: Jul 21, 1986
• Grant date: Nov 17, 1987
• Expiry date: Jul 21, 2006

Classification

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

Abstract

A process for improving the lightfastness of dyeings obtained with acid dyes and/or metal complex dyes on polyamide textile materials, by treating the latter with 0.01-1% by weight of a copper hydroxamate before, during or after dyeing.