Uniformly dyed water-swellable cellulosic fibers

US4294581A · kind A · utility

Assignee

• BASF SE

Inventors

• Siegfried Mensch · Frankenthal (Pfalz), DE
• Gerhard Epple · Bad Dürkheim, DE
• Wolfgang Elser · Fairfax, US

Key dates

• Filing date: Nov 16, 1979
• Grant date: Oct 13, 1981
• Expiry date: Nov 16, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/918
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Uniformly dyed water-swellable cellulosic fibers which have been produced by contacting water-swellable cellulosic fibers successively or simultaneously with water, with ethylene glycol, propylene glycol or derivatives of these and with an essentially water-insoluble dye of the formula ##STR1## where Y is unsubstituted or substituted phenyl or naphthyl or an unsubstituted or substituted saturated or unsaturated 5-membered or 6-membered heterocyclic radical, two of the three radicals X are hydroxyl and the remaining radical X is ##STR2## where A is chlorine, bromine, cyano, nitro, an aliphatic, cycloaliphatic, araliphatic or aromatic radical and n is 0, 1, 2 or 3 and where, if n>1, the radicals are identical or different. Deep reddish blue to green dyeings or prints are obtained. The dyeings have very good fastness characteristics.