Phthalimidylazo dyes, process for their preparation and the use thereof

US6008332A · kind A · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Paul Herzig · Basel, CH
• Romeo Dreier · Fehren, CH

Key dates

• Filing date: Jul 17, 1996
• Grant date: Dec 28, 1999
• Expiry date: Jul 17, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/0033
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disperse azo dyes of formula ##STR1## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.2 alkyl, halogen, NH--CO--R.sub.5 or O--SO.sub.2 --R.sub.6 ; R.sub.2 is hydrogen, halogen, C.sub.1 -C.sub.4 alkyl, unsubstituted C.sub.1 -C.sub.8 alkoxy or C.sub.1 -C.sub.8 alkoxy which is substituted by halogen, cyano, phenyl, --Y--C.sub.1 -C.sub.8 alkyl or --Y-phenyl; R.sub.3 is unsubstituted C.sub.1 -C.sub.8 alkyl or C.sub.1 -C.sub.8 alkyl which is substituted by hydroxy, cyano, vinyl, phenyl, halogen, --X-phenyl or --X--C.sub.1 -C.sub.8 alkyl, and --X--C.sub.1 -C.sub.8 alkyl may be substituted by halogen or cyano and --X-phenyl may be substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halogen; R.sub.4 is hydrogen or, independently of R.sub.3, has the meaning of R.sub.3, and R.sub.3 and R.sub.4, together with the linking nitrogen atom, can also be a heterocyclic radical; R.sub.5 is unsubstituted C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 alkyl which is substituted by halogen, phenyl, cyano or C.sub.1 -C.sub.3 alkoxy; R.sub.6 is unsubstituted C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkyl which is substituted by halogen, cyano or phenyl, and phenyl in turn may be substituted by C.su…