3-Nitro-5-azopyridine dyestuffs

US4068085A · kind A · utility

Assignee

• Ciba-Geigy · US

Inventors

• Visvanathan Ramanathan · Basel, CH
• Ulrich Schlesinger · Binzen, DE
• Rene de Montmollin · Riehen, CH

Key dates

• Filing date: Dec 1, 1975
• Grant date: Jan 10, 1978
• Expiry date: Dec 1, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B62/0088
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An azo dyestuff of the formula ##STR1## wherein two of the radicals Z denote groups of the formula --NR'R" and one radical Z denotes a group of the formulae --NR'R", --OR' or --S-R', and R' and R" and R" each denote hydrogen, aryl, aralkyl, cycloalkyl or an aliphatic radical and R' and R" can form a ring containing the amine nitrogen and the radicals --NR'R" can be identical to, or different from, one another, Z.sub.3 is also a hydrogen, chlorine or bromine atom or an optionally substituted hydrocarbon radical and D is the radical of an aromatic or heterocyclic diazo component. The new dyestuffs dye synthetic fibers, such as polyester and acrylic fibers in fast yellow, and red shades.