Iron, copper and chromium complexes of disazo dyes

US4638055A · kind A · utility

Assignee

• BASF SE

Inventors

• Udo Bergmann · Darmstadt, DE
• Guenter Hansen · Ludwigshafen, DE
• Georg Zeidler · Schifferstadt, DE

Key dates

• Filing date: May 10, 1985
• Grant date: Jan 20, 1987
• Expiry date: May 10, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B33/24
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds which in the form of the free acid are of the general formula I ##STR1## where A is a radical of the formula ##STR2## the radicals Y independently of one another are each hydroxyl or amino, X is hydrogen, hydroxysulfonyl or a radical of the formula EQU D--N.dbd.N--, R is a radical of 1-aminonaphthalene-4-, -5-, -6-, -7-or -8-monosulfonic acid or of 1-aminonaphthalene-3-6,-, -3,7-, -3,8-, -4,7- or -4,8-disulfonic acid, or a Cu, Fe, Ni, Co, Mn or Cr complex thereof, and D is phenyl which is unsubstituted or substituted by methyl, methoxy,ethoxy, nitro, chlorine, bromine or sulfo, or is sulfo-substituted naphthyl. These compounds are preferably used for dyeing leather.