Phenyl-azo-phenyl dyestuffs

US4134887A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Hermann Fuchs
• Gustav Kapaun · Bad Soden, DE
• Fritz Meininger

Key dates

• Filing date: Nov 16, 1977
• Grant date: Jan 16, 1979
• Expiry date: Nov 16, 1997

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B62/51
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Fiber-reactive azo dyestuffs are obtained by diazotizing an amine of the formula ##STR1## in which Z stands for EQU --CH.sub.2 -CH.sub.2 --A or EQU --CH.dbd.CH.sub.2 in which A is N,N-dialkylamino with 1 to 4 carbon atoms in each alkyl moiety or is chlorine, bromine, sulfato, thiosulfato, phosphato and acetoxy it with an azo component of the formula EQU H--B, in which B is ##STR2## wherein R is hydrogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, acetylamino, chlorine or bromine, R.sub.1 is hydrogen or alkyl with 1 to 4 carbon atoms unsubstituted or substituted by hydroxy or cyano, and R.sub.2 is lower alkyl with 1 to 4 carbon atoms unsubstituted or substituted by hydroxy or cyano, or is acetyl or benozyl. The new dyestuffs are especially suitable for dyeing and printing fiber materials, such as silk, wool, synthetic polyamide or polyurethane, and above all, native and regenerative cellulose. They possess a very high fiber reactivity so that they fix on the fiber material very rapidly even at low temperatures and are thus very suitable in continuous dyeing processes.