DE501626C - Process for the preparation of Kuepen dyes - Google Patents

Process for the preparation of Kuepen dyes

Info

Publication number
DE501626C
DE501626C DEI35009D DEI0035009D DE501626C DE 501626 C DE501626 C DE 501626C DE I35009 D DEI35009 D DE I35009D DE I0035009 D DEI0035009 D DE I0035009D DE 501626 C DE501626 C DE 501626C
Authority
DE
Germany
Prior art keywords
preparation
dyes
kuepen dyes
carbazole
kuepen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEI35009D
Other languages
German (de)
Inventor
Dr Otto Limpach
Dr Maximilian Paul Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI35009D priority Critical patent/DE501626C/en
Application granted granted Critical
Publication of DE501626C publication Critical patent/DE501626C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • 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
    • C09B7/00—Indigoid dyes
    • C09B7/08—Other indole-indigos

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Indole Compounds (AREA)

Description

Verfahren zur Darstellung von Küpenfarbstoffen Nach dem Verfahren der Patentschriften 241 997e #-«69 123 erhält man violette bis schwarze Küpenfarbstoffe, wenn man. Oxybenzocarbazole mit a-kondensationsfähigen Isatinderivaten kondensiert.Process for the preparation of vat dyes According to the process of patent specifications 241 997e # - «69 123, violet to black vat dyes are obtained if one. Oxybenzocarbazole condensed with α-condensable isatin derivatives.

Es wurde nun gefunden, daß man eine beträchtliche Steigerung der Echtheitsieigenschaften der Farbstoffe erzielt, wenn man von den Carbazol-N-slib,stituierten Oxyb-enzocarbazolen ausgeht. So erreicht -man eine we- werden mit 222 Teilen Isatin-u-anilid in Essigsäureanhydrid erwärmt, bis das Anilid nicht mehr nachweisbar ist. Nach dem Ab- kühlen wird der, gebildete Farbstoff abge.saugt und mit Alkohol gewaschen. Man erhält so ein grauschwarzes Kristallpulver, das mit Natronlauge und Hydrosulfit eine gelbe Küpe liefert, aus der Wolle und Baumwolle mit gelber Farbe angefärbt werden, die beim Verhängen an der Luft in ein tiefes Schwarz übergeht. Der Farbstoff zeigt wesentlich bessentlich bessere Chlor-, Licht- und Abklatschechtheit, ohne daßr die schon vorhandenen guten Eigenschaften der Körperklasse - wie gutes Zuggvermögen - speziell im Druck beeinträchtigt werden. Beispiel 247 Teile N-methyl-i-2-(i-oxybenzo-) carbazol: sere Echtheitseigen5chaften als der nichtmethylierte.It has now been found that a considerable increase in the fastness properties of the dyes is achieved when starting from the carbazole-N-slib, substituted oxyb-enzocarbazoles. This is how you achieve a are heated with 222 parts of isatin-u-anilide in acetic anhydride until the anilide is no longer detectable. After the cool exhaust of, dye formed is abge.saugt and washed with alcohol. This gives a gray-black crystal powder which, together with sodium hydroxide solution and hydrosulfite, produces a yellow vat from which wool and cotton are dyed with a yellow color, which turns into a deep black when hung in the air. The dye shows significantly better resistance to chlorine, light and set-off, without the already existing good properties of the body class - such as good tensile strength - being impaired, especially in printing. Example 247 parts of N-methyl-i-2- (i-oxybenzo) carbazole: more fastness properties than the non-methylated one.

Claims (1)

PATENTANSPRUCII: Verfahren zur Darstellung von Küpenfarbstoffen, dadurch gekennzeichnet, daß man Carbazol-N-substituierte Oxybenzocarbazole, deren Substitutionsprodukte, Homologe oder Analoge mit reaktionsfähigen a-Isatinderivaten, deren Substitutionsprodukten, Homologen und Analogen kondensiert.PATENT CLAIM: Process for the preparation of vat dyes, thereby characterized in that carbazole-N-substituted oxybenzocarbazoles, their substitution products, Homologues or analogs with reactive a-isatin derivatives, their substitution products, Homologues and analogs condensed.
DEI35009D 1928-07-22 1928-07-22 Process for the preparation of Kuepen dyes Expired DE501626C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI35009D DE501626C (en) 1928-07-22 1928-07-22 Process for the preparation of Kuepen dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI35009D DE501626C (en) 1928-07-22 1928-07-22 Process for the preparation of Kuepen dyes

Publications (1)

Publication Number Publication Date
DE501626C true DE501626C (en) 1930-07-14

Family

ID=7188865

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI35009D Expired DE501626C (en) 1928-07-22 1928-07-22 Process for the preparation of Kuepen dyes

Country Status (1)

Country Link
DE (1) DE501626C (en)

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