SAID DYESTUFFS BEING EASILY SOLUBLE IN WATER AND BEING SUITABLE FOR THE DYEING OF LEATHER AND FUR SUEDES, THE DYEINGS OBTAINED ON SIAD MATERIALS MOSTLY SHOWING A YELLOWISHBROWN SHADE AND HAVING A GOOD RESISTANCE TO ACIDS, A GOOD LEVELLING AND PENETRATING POWER, AND POSSESSING GOOD PROPERTIES OF FASTNESS TO WATER, WASHING, PERSPIRATION, SOLVENTS AND TO LIGHT.
WHEREIN X REPRESENTS A NITRO OR NITRILE GROUP, Y REPRESENTS A HYDROGEN A HALOGEN ATOM, OR A NITRO OR NITRILE GROUP, R1 REPRESENTS A LOWER ALKYL OR PHENYL RADICAL, R2 REPRESENTS A METHYL, PHENYL, CHLOROPHENYL, HYDROXYPHENYL OR METHYLENEDIOXYPHENYL RADICAL, AND R3 REPRESENTS A METHYL, PHENYL, HYDROXYPHENYL OR LOWER ALKOXY GROUP, AND A PROCESS FOR PREPARING SAID DYESTUFFS.
Abstract:
Water soluble trisazo dyestuffs of the formula in which A is 1-amino-8-naphthol-3,6-disulfonic acid or 1-amino-8-naphthol-4,6-disulfonic acid, or a mixture of these two compounds, and B is 1-(3'- or 4'-aminophenyl)-3-methyl-5-pyrazolone, a process for their manufacture by diazotizing component A and coupling it with 3,3'-dihydroxy-diphenylamine to give a monoazo dyestuff, reacting this dyestuff with diazotized component B to give a disazo dyestuff, and converting this dyestuff to the trisazo dyestuff by uniting it with diazotized 4-nitro-4'-amino-diphenylamine-2-sulfonic acid, or by operating as described while, however, changing the sequence of reaction of component B and 4-nitro-4'-amino-diphenylamine-2-sulfonic acid, and use of these dyestuffs for the dyeing of leather and fur.
Abstract:
Water soluble trisazo dyestuffs of the formula in which A is 1-amino-8-naphthol-3,6-disulfonic acid or 1-amino-8-naphthol-4,6-disulfonic acid, or a mixture of these two compounds, and B is 1-(3'- or 4'-aminophenyl)-3-methyl-5-pyrazolone, a process for their manufacture by diazotizing component A and coupling it with 3,3'-dihydroxy-diphenylamine to give a monoazo dyestuff, reacting this dyestuff with diazotized component B to give a disazo dyestuff, and converting this dyestuff to the trisazo dyestuff by uniting it with diazotized 4-nitro-4'-amino-diphenylamine-2-sulfonic acid, or by operating as described while, however, changing the sequence of reaction of component B and 4-nitro-4'-amino-diphenylamine-2-sulfonic acid, and use of these dyestuffs for the dyeing of leather and fur.
Abstract:
Water soluble trisazo dyestuffs of the formula in which A is 1-amino-8-naphthol-3,6-disulfonic acid or 1-amino-8-naphthol-4,6-disulfonic acid, or a mixture of these two compounds, and B is 1-(3'- or 4'-aminophenyl)-3-methyl-5-pyrazolone, a process for their manufacture by diazotizing component A and coupling it with 3,3'-dihydroxy-diphenylamine to give a monoazo dyestuff, reacting this dyestuff with diazotized component B to give a disazo dyestuff, and converting this dyestuff to the trisazo dyestuff by uniting it with diazotized 4-nitro-4'-amino-diphenylamine-2-sulfonic acid, or by operating as described while, however, changing the sequence of reaction of component B and 4-nitro-4'-amino-diphenylamine-2-sulfonic acid, and use of these dyestuffs for the dyeing of leather and fur.