Direct disazo dyestuffs

US5684139A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Wild · Odenthal, DE
• Karin Hassenruck · Mülheim an der Ruhr, DE
• Frank-Michael Stohr · Odenthal, DE

Key dates

• Filing date: Jul 5, 1996
• Grant date: Nov 4, 1997
• Expiry date: Jul 5, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B43/136
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Dyestuffs of the formula (I) ##STR1## wherein R.sup.1 and R.sup.4 independently of one another represent an acyl radical, PA1 R.sup.2 and R.sup.3 independently of one another represent hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, PA1 X represents a bridge member which is not fibre-reactive and PA1 n and m independently of one another represent 1 or 2, are outstandingly suitable for dyeing and printing substrates containing hydroxyl and/or amide groups, in particular for printing paper by the ink-jet method.