CH194660A - Process for the preparation of a leather dye. - Google Patents

Process for the preparation of a leather dye.

Info

Publication number
CH194660A
CH194660A CH194660DA CH194660A CH 194660 A CH194660 A CH 194660A CH 194660D A CH194660D A CH 194660DA CH 194660 A CH194660 A CH 194660A
Authority
CH
Switzerland
Prior art keywords
dye
leather
nitro
aminodiphenylamine
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
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
Publication of CH194660A publication Critical patent/CH194660A/en

Links

Description

  

  Verfahren zur Herstellung eines     Lederfarbstoffes.       Nach dem im Hauptpatent beschriebenen  Verfahren erhält man einen Leder in echten  Tönen anfärbenden     Farbstoff,    wenn man     1.2-          Dioxybenzol    mit einem     Mol    dianotierter     4'-          Niti-o-4-amiriodiphenylamin-2'-sulfosäure    und  einem     Mol    dianotiertem     4-Nitro-l-amirioben-          zol    kuppelt.  



  Wie nun weiter gefunden wurde; erhält  man einen Farbstoff von ähnlichen Eigen  schaften, wenn man dianotierte     4'-Nitro-4-          amiriodiphenylamin-2'-sulfosäure    mit     1.2-Di-          oxybenzol    kuppelt, den erhaltenen     Farbstoff     mit einem schwach wirkenden Oxydations  mittel behandelt und dann durch Zusatz eines  weiteren     Mols    dianotierter     4'-Nitro-4-amino-          dipheriylamin-2'-sulfosäure    den     Disazofarbstoff     bildet.  



  <I>Beispiel:</I>  30,9 Teile     4'-Nitro-4-aminodiphenylamin-          2'-sulfosäure    werden in der üblichen Weise  dianotiert, die     Diazolösung    lässt man in eine    kalte,     sodaalkalisch    gehaltene Lösung von 11  Teilen     1.2-Diogybenzol    einlaufen. Die Kupp  lung erfolgt augenblicklich.

   Durch die Lösung  des so erhaltenen     Monoazofarbstoffes    bläst  man unter Erwärmen einige Stunden lang  einen Luftstrom und gibt weiterhin die     Diazo-          verbindnng    zu, die aus 30,9 Teilen     4'-Nitro-          4-aminodiphenylamin-2'-sulfosäure    bereitet ist,  wobei die Reaktionslösung immer alkalisch  bleiben soll. Nach beendeter Kupplung wird  der Farbstoff aasgesalzen, er färbt Chrom  leder und     vegetabilisch    gegerbtes Leder in  havannabraunen Tönen von guten Echtheits  eigenschaften.



  Process for the preparation of a leather dye. According to the process described in the main patent, a dye which dyes leather in real shades is obtained if 1.2-dioxybenzene is mixed with one mole of dianotated 4'-Niti-o-4-amiriodiphenylamine-2'-sulfonic acid and one mole of dianotized 4-nitro-l amirioben- zol domes.



  As has now been found further; a dye of similar properties is obtained if dianotated 4'-nitro-4-amiriodiphenylamine-2'-sulfonic acid is coupled with 1,2-dioxybenzene, the dye obtained is treated with a weak oxidizing agent and then by adding a further mol dianotized 4'-nitro-4-aminodipheriylamine-2'-sulfonic acid forms the disazo dye.



  <I> Example: </I> 30.9 parts of 4'-nitro-4-aminodiphenylamine-2'-sulfonic acid are dianotized in the usual way, the diazo solution is left in a cold, soda-alkaline solution of 11 parts of 1,2-diogybenzene come in. The coupling is instantaneous.

   A stream of air is blown through the solution of the monoazo dye thus obtained with heating for a few hours and the diazo compound, which is prepared from 30.9 parts of 4'-nitro-4-aminodiphenylamine-2'-sulfonic acid, is also added, the reaction solution should always remain alkaline. When the coupling is complete, the dye is carrion-salted, it dyes chrome leather and vegetable-tanned leather in havana brown shades with good fastness properties.

 

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines Leder farbstoffes, dadurch gekennzeichnet, dass man 1.2-Dioxybenzol mit 1 Mol 4'-Nitro-4-amino- diphenylamin-2'-sulfosäure kuppelt, <B> PATENT CLAIM: </B> Process for the production of a leather dye, characterized in that 1,2-dioxybenzene is coupled with 1 mol of 4'-nitro-4-aminodiphenylamine-2'-sulfonic acid, die Lö sung des erhaltenen 11Zonoazofarbstoffes mit einem schwachen Oxydationsmittel behandelt und dann mit einem weiteren Mol diazotier- ter 4'-Nitro-4-aminodiphenylamin-2'-sulfo-säu- re weiterkuppelt. Der Farbstoff färbt Chrom leder und vegetabilisch gegerbtes Leder in havannabraunen Tönen von guten Echtbeits- eigenschaften. the solution of the 11-zonoazo dye obtained is treated with a weak oxidizing agent and then coupled further with a further mol of diazotized 4'-nitro-4-aminodiphenylamine-2'-sulfo-acid. The dye dyes chrome leather and vegetable-tanned leather in havana brown tones with good real working properties.
CH194660D 1935-07-20 1935-09-12 Process for the preparation of a leather dye. CH194660A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE194660X 1935-07-20
CH189871T 1935-09-12

Publications (1)

Publication Number Publication Date
CH194660A true CH194660A (en) 1937-12-15

Family

ID=25721891

Family Applications (1)

Application Number Title Priority Date Filing Date
CH194660D CH194660A (en) 1935-07-20 1935-09-12 Process for the preparation of a leather dye.

Country Status (1)

Country Link
CH (1) CH194660A (en)

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