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C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
C09B29/00—Monoazo dyes prepared by diazotising and coupling
C09B29/34—Monoazo dyes prepared by diazotising and coupling from other coupling components
C09B29/36—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds
C09B29/3604—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom
C09B29/3647—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a five-membered ring with two nitrogen atoms as heteroatoms
C09B29/3652—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a five-membered ring with two nitrogen atoms as heteroatoms containing a 1,2-diazoles or hydrogenated 1,2-diazoles
C09B29/366—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a five-membered ring with two nitrogen atoms as heteroatoms containing a 1,2-diazoles or hydrogenated 1,2-diazoles containing hydroxy-1,2-diazoles, e.g. pyrazolone
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Description
BERLIN. GEDRUCKT IN DER KEICHSDRUCKEREI.BERLIN. PRINTED IN THE KEICHSDRUCKEREI.
Claims (1)
Pate nt-An spruch:Sponsorship claim:Verfahren zur Darstellung von in Wasser löslichen Azofarbstoffen, darin bestehend,
daß man Diazoverbindungen von Sulfo- und Carbonsäuren der Benzol- oder Naphtalinreihe
mit 3-Methyl-5-pyrazolon kuppelt.Process for the preparation of water-soluble azo dyes, consisting therein
that one diazo compounds of sulfo and carboxylic acids of the benzene or naphthalene series
couples with 3-methyl-5-pyrazolone.