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CH196883A - 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
CH196883A
CH196883A CH196883DA CH196883A CH 196883 A CH196883 A CH 196883A CH 196883D A CH196883D A CH 196883DA CH 196883 A CH196883 A CH 196883A
Authority
CH
Switzerland
Prior art keywords
water
preparation
disazo dye
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 CH196883A publication Critical patent/CH196883A/en

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  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines wasserunlöslichen     Bisazofarbstoffes.       Es wurde gefunden, dass man     -durch    Kup  peln von     tetrazotiertem        p,p'-Dimethyl-m,m        -          diaminodiphenylsulfon    mit 2     Mol.        a-Naph-          thylamin    einen neuen, wertvollen, wasser  unlöslichen     Disazofarbatoff    erhält, ,der sich  infolge seiner guten Löslichkeit zum Färben  von     Zelluloseester-    und     Spritlacken,    Ölen und  Fetten,     Kohlenwasseratoffen,    Harzen, Wach  sen,

   sowie für graphische Zwecke, wie bei  spielsweise Kupfertiefdruck, eignet.  



  Der neue Farbstoff, ein braunrotes Pul  ver, löst sich in Alkohol orange und in kon  zentrierter Schwefelsäure violett und     ,gibt     sehr reine, braune Drucke, die sich durch  hervorragende     Sublimierechtheit    auszeichnen.  <I>Beispiel:</I>  6,9 kg     p,p'-Dimethyl-m,m        -diaminodiphe-          nylsulfon    werden in üblicher     Weise        tetrazo-          tiert    und langsam bei 0   zu einer feinverteil  ten,     wässrigen,Suspension    von<B>9,11,--</B>     a-Naph-          thylaminchlorhydrat    gegeben.

   Durch lang  same Zugabe von     Natriumacetat    wird die  Mineralsäure     abgestumpft    und die     Kupplung     beendet. Nachher wird     filtriert,    neutral ge-    waschen und getrocknet.

       Das    erhaltene braun  rote Pulver löst sich in Alkohol orange und  in     konzentrierter    Schwefelsäure violett und  färbt     Zelluloseester-    und     Spritlacke,    sowie  Öle, Fette,     gohlenwasserstoffe,    Harze, Wachse  und     Lösungsmittelgemische    für Kupfertief  druck in sehr     reinen,    braunen Tönen, die  Drucke von sehr     guter        Sublimierechtheit    er  geben.



  Process for the preparation of a water-insoluble bisazo dye. It has been found that - by coupling tetrazotized p, p'-dimethyl-m, m - diaminodiphenyl sulfone with 2 moles of a-naphthylamine, a new, valuable, water-insoluble disazo carbate is obtained, which is due to its good solubility for coloring cellulose ester and fuel varnishes, oils and fats, hydrocarbons, resins, waxes,

   as well as for graphic purposes, such as for example rotogravure printing.



  The new dye, a brownish-red powder, dissolves orange in alcohol and violet in concentrated sulfuric acid and gives very pure, brown prints that are characterized by excellent sublimation fastness. <I> Example: </I> 6.9 kg of p, p'-dimethyl-m, m -diaminodiphenylsulfone are tetrazole in the usual way and slowly at 0 to form a finely divided, aqueous suspension of <B> 9.11, - a-naphthylamine chlorohydrate given.

   The mineral acid is blunted and the coupling terminated by slowly adding sodium acetate. It is then filtered, washed neutral and dried.

       The brown-red powder obtained dissolves orange in alcohol and violet in concentrated sulfuric acid and stains cellulose ester and fuel varnishes, as well as oils, fats, hydrocarbons, resins, waxes and solvent mixtures for copper gravure printing in very pure, brown tones, the prints are very fast to sublimation he give.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines wasser unlöslichen Disazofarbstoffes, dadurch ge kennzeichnet, @dass man tetrazotiertes p,p'- Dimethyl - m,m' - diaminodiphenylsulf an mit 2 Mol. a-Naphthylamin kuppelt. PATENT CLAIM: Process for the production of a water-insoluble disazo dye, characterized in that tetrazotized p, p'-dimethyl - m, m '- diaminodiphenylsulf is coupled with 2 moles of a-naphthylamine. Der neue Farbstoff, ein braunrotes Pulver, löst sich in Alkohol orange und in konzentrierter Schwefelsäure violett und färbt Zellulose- ester- und iSpritlacke, sowie Öle, Fette, Kohlenwaeserstoffe, Harze, Wachse und Lösungsmittelgemisohe für Kupfertiefdruck in sehr reinen, braunen Tönen, die Drucke von sehr guter ,Sublimierechtheit ergeben. The new dye, a brownish red powder, dissolves in alcohol orange and in concentrated sulfuric acid violet and colors cellulose ester and iSprit lacquers, 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.
CH196883D 1936-05-08 1937-01-05 Process for the preparation of a water-insoluble disazo dye. CH196883A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE196883X 1936-05-08
CH194188T 1937-01-05

Publications (1)

Publication Number Publication Date
CH196883A true CH196883A (en) 1938-03-31

Family

ID=25722634

Family Applications (1)

Application Number Title Priority Date Filing Date
CH196883D CH196883A (en) 1936-05-08 1937-01-05 Process for the preparation of a water-insoluble disazo dye.

Country Status (1)

Country Link
CH (1) CH196883A (en)

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