Cationic mono- and dis-azo dyestuffs, and their preparation and use for dyeing paper and cationic dyeable substrates

US4509948A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Wild · Odenthal, DE
• Frank-Michael Stohr · Odenthal, DE

Key dates

• Filing date: Aug 5, 1983
• Grant date: Apr 9, 1985
• Expiry date: Aug 5, 2003

Classification

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

Abstract

Cationic dyestuffs of the general formula ##STR1## wherein D is the radical of a diazo component free of anionic groups, PA1 X is a radical of the formula COCH.sub.3, CN, COOCH.sub.3, COOC.sub.2 H.sub.5, CONH.sub.2 or COC.sub.6 H.sub.5, PA1 R.sub.1 and R.sub.2 independently of each other are hydrogen or a nonionic substituent and PA1 R.sub.3, R.sub.4 and R.sub.5 independently of one another are alkyl, alkenyl or aralkyl, or PA1 R.sub.3 and R.sub.4, together with the nitrogen to which they are bonded, form a 5- or 6-membered heterocyclic ring, PA1 n is 1 or 2 and PA1 An.sup.(-) is an anion, and wherein the cyclic and acyclic radicals can in turn be substituted, are used for dyeing synthetic and natural cationically dyeable materials, such as cotton, paper, leather, polyacrylnitrile or acid-modified polyester or polyamide fibres.