Trisazo dyes

US6028179A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Scholz · Ludwigshafen, DE
• Gunther Lamm · Haßloch, DE

Key dates

• Filing date: Oct 5, 1998
• Grant date: Feb 22, 2000
• Expiry date: Oct 5, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B45/24
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Trisazo dyes of the general formula I ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl, halogen, nitro, hydroxysulfonyl, sulfamoyl, mono- or di-C.sub.1 -C.sub.4 -alkylsulfamoyl, C.sub.1 --C.sub.4 -alkylsulfonyl or C.sub.1 -C.sub.4 -alkoxysulfonyl, PA1 R.sup.2 is hydrogen, halogen, nitro or hydroxysulfonyl, at least one of R.sup.1 and R.sup.2 being nitro, PA1 R.sup.3 and R.sup.4 are each independently of the other hydroxyl or amino, PA1 R.sup.5 is hydrogen, C.sub.1 -C.sub.4 -alkyl, hydroxysulfonyl, sulfamoyl, mono- or di-C.sub.1 -C.sub.4 -alkylsulfamoyl, C.sub.1 -C.sub.4 -alkylsulfonyl, C.sub.1 -C.sub.4 -alkoxysulfonyl or carboxyl, PA1 R.sup.6 is hydrogen or C.sub.1 -C.sub.4 -alkyl, PA1 R.sup.7 is hydrogen, C.sub.1 -C.sub.4 -alkyl, hydroxysulfonyl, sulfamoyl, mono- or di-C.sub.1 -C.sub.4 -alkylsulfamoyl, C.sub.1 -C.sub.4 -alkylsulfonyl, C.sub.1 -C.sub.4 -alkoxysulfonyl, SO.sub.2 N(CH.sub.2 COOH).sub.2 or carboxyl, PA1 R.sup.8 is hydrogen, C.sub.1 -C.sub.4 -alkyl, hydroxyl, C.sub.1 -C.sub.4 -alkoxy, halogen or nitro, with the proviso that at least one of R.sup.5 and R.sup.7 is COOH or SO.sub.3 H and when R.sup.5 or R.sup.7 is SO.sub.3 H the other is COOH, or R.sup.3 and/or…