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CH196880A - Process for the preparation of a water-insoluble disazo dye. - Google Patents

Process for the preparation of a water-insoluble disazo dye.

Info

Publication number
CH196880A
CH196880A CH196880DA CH196880A CH 196880 A CH196880 A CH 196880A CH 196880D A CH196880D A CH 196880DA CH 196880 A CH196880 A CH 196880A
Authority
CH
Switzerland
Prior art keywords
water
disazo dye
preparation
insoluble disazo
dye
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH196880A publication Critical patent/CH196880A/en

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Description

  

  Verfahren zur Herstellung eines     wasserunlöslichen        Disazofarbstoffes.            Es        wurde    gefunden, dass man     durch    Kup  peln von     tetrazotiertem        m,m'-Diaminodiphe-          nylsulfan    mit 2     Mol.        ss-Naphthylamin    einen  neuen, wertvollen, wasserunlöslichen     Disazo-          farbstoff    erhält,

   der sich infolge seiner guten       Löslichkeit    zum Färben von     Zellulose.ester-          und        Spritlacken,    Ölen und Fetten, Kohlen  wasserstoffen, Harzen,     Wachsen,    sowie für  graphische Zwecke, wie beispielsweise Kupfer  tiefdruck,     eignet.     



  Der neue Farbstoff, ein orangen Pulver,  löst sich in Alkohol gelborange und in kon  zentrierter     -Sehwefelsäure    blau und gibt sehr  reine, braune Drucke, die sich durch hervor  ragende     @Sublimierechtheit    auszeichnen.    <I>Beispiel:</I>    6,2 kg     m,m'-Diaminodiphenylsulfon    wer  den in üblicher Weise     tetrazotiert    und lang  sam bei 0   zu einer     feinverteilten,        wässrigen     Suspension von 9,1 kg     ss-Naphthylaminchlor-          hydrat    gegeben. Durch langsame Zugabe von       Natriumacetat    wird die Mineralsäure ab  gestumpft     und,die    Kupplung beendet.

   Nach-    her wird filtriert, neutral gewaschen und ge  trocknet. Das erhaltene orange Pulver löst  sich in Alkohol ,gelborange und .in konzen  trierter Schwefelsäure blau und färbt     Zellu-          loseester-    und     Spritlacke,    sowie     Öle,        Fette,          Kohlenwasserstoffe,    Harze,     Wachse    und       Lösungsmittelgemische    für     Kupfertiefdruck     in sehr     reinen,        braunen    Tönen, die Drucke  von sehr     guter        Sublimierechtheit    ergeben.



  Process for the preparation of a water-insoluble disazo dye. It has been found that by coupling tetrazotized m, m'-diaminodiphenylsulfane with 2 mol. Ss-naphthylamine, a new, valuable, water-insoluble disazo dye is obtained,

   which, due to its good solubility, is suitable for dyeing cellulose ester and fuel varnishes, oils and fats, hydrocarbons, resins, waxes, and for graphic purposes, such as copper gravure printing.



  The new dye, an orange powder, dissolves yellow-orange in alcohol and blue in concentrated sulfuric acid and produces very pure, brown prints that are characterized by excellent @sublimationfastness. <I> Example: </I> 6.2 kg of m, m'-diaminodiphenyl sulfone are tetrazotized in the usual way and slowly added at 0 to a finely divided, aqueous suspension of 9.1 kg of s-naphthylamine chlorohydrate. By slowly adding sodium acetate, the mineral acid is blunted and the coupling is ended.

   It is then filtered, washed neutral and dried. The orange powder obtained dissolves in alcohol, yellow-orange and in concentrated sulfuric acid blue and colors cellulose ester and fuel varnishes, as well as oils, fats, hydrocarbons, resins, waxes and solvent mixtures for copper gravure in very pure, brown tones, the prints of very good fastness to sublimation.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser unlöslichen Disazofarbstoffes, dadurch ge kennzeichnet, dass man tetrazotiertes m,m - Diaminodiphenylsulfon mit 2 Mol. ss-Naph- thylamin kuppelt. PATENT CLAIM: Process for the production of a water-insoluble disazo dye, characterized in that tetrazotized m, m-diaminodiphenylsulfone is coupled with 2 mol. Ss-naphthylamine. Der neue Farbstoff, ein orangen Pulver, löst sich in Alkohol .gelb orange und in konzentrierter !Schwefelsäure blau und färbt Zelluloseester- und .Sprit- lacke, sowie Öle, Fette, Kohlenwasserstoffe, Harze,. Wachse und Lösungsmittelgemische für Kupfertiefdruck in sehr reinen, braunen Tönen, die Drucke von sehr guter Sublimier ecUtheit ergeben. The new dye, an orange powder, dissolves in alcohol. Yellow orange and in concentrated sulfuric acid blue and colors cellulose ester and. Fuel lacquers, as well as oils, fats, hydrocarbons, resins. Waxes and solvent mixtures for copper gravure printing in very pure, brown tones, which result in prints with very good sublimation integrity.
CH196880D 1936-05-08 1937-01-05 Process for the preparation of a water-insoluble disazo dye. CH196880A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE196880X 1936-05-08
CH194188T 1937-01-05

Publications (1)

Publication Number Publication Date
CH196880A true CH196880A (en) 1938-03-31

Family

ID=25722631

Family Applications (1)

Application Number Title Priority Date Filing Date
CH196880D CH196880A (en) 1936-05-08 1937-01-05 Process for the preparation of a water-insoluble disazo dye.

Country Status (1)

Country Link
CH (1) CH196880A (en)

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