CH148016A - Process for the preparation of a direct disazo dye. - Google Patents

Process for the preparation of a direct disazo dye.

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Publication number
CH148016A
CH148016A CH148016DA CH148016A CH 148016 A CH148016 A CH 148016A CH 148016D A CH148016D A CH 148016DA CH 148016 A CH148016 A CH 148016A
Authority
CH
Switzerland
Prior art keywords
dye
direct
color
preparation
violet
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 CH148016A publication Critical patent/CH148016A/en

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Description

  

  Verfahren zur     Darstellung    eines direkt ziehenden     Disazofarbstofies.       Es wurde gefunden, dass man einen neuen,  direkt ziehenden     Disazofarbstoff    erhält,  wenn man     tetrazotiertes        3,3'-Diamino-4,4'-          dioxy-5,5'-dimethyl-diphenylsulfon    mit 2  Molekülen     Phenyl-2-amino-5-naphtol-7-sulfo-          säure    kuppelt.

      <I>Beispiel:</I>  31 Teile     3,3'-Diamino-4,4'-dioxy-5,5'-di-          methyl-diphenylsulfon        werden    salzsauer un  ter Zusatz von Eis mit 14 Teilen Natrium  nitrit     tetrazotiert    und mit 64     Teilen        Phenyl-          2-amino=5-naphtol-7-sulfosäure        sodaalkalisch     gekuppelt. Man lässt 24     Stunden    rühren, er  wärmt und salzt aus.  



  Der     getrocki.ete    Farbstoff ist ein     dunkel-          bronziges    Pulver, das sich in Wasser mit       blauvioletter,    in Schwefelsäure mit rot  violetter Farbe löst. Er lässt sich auf Baum  wolle direkt färben als Bordeauxrosa und  geht beim Behandeln mit Kupfersulfat in  Violett über. Denselben -Farbton erreicht  man, wenn man das Kupfersalz des Farb-         stoffes    verwendet. Die Ausfärbung ist von  hervorragender Licht- und guter Wasch  echtheit.



  Process for the preparation of a direct disazo dye. It has been found that a new, direct disazo dye is obtained when tetrazotized 3,3'-diamino-4,4'-dioxy-5,5'-dimethyl-diphenylsulfone with 2 molecules of phenyl-2-amino-5- Naphthol-7-sulfonic acid couples.

      <I> Example: </I> 31 parts of 3,3'-diamino-4,4'-dioxy-5,5'-dimethyl-diphenylsulfone are tetrazotized with 14 parts of sodium nitrite and with hydrochloric acid with the addition of ice 64 parts of phenyl-2-amino = 5-naphthol-7-sulfonic acid coupled with alkaline soda. It is left to stir for 24 hours, it is warmed up and salted out.



  The dried dye is a dark bronze powder that dissolves in water with a blue-violet color and in sulfuric acid with a red-violet color. It can be dyed directly on cotton as burgundy pink and turns purple when treated with copper sulphate. The same color shade can be achieved if the copper salt of the dye is used. The color is extremely lightfast and washfast.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines direkt ziehenden Disazofarbstoffes, dadurch ge kennzeichnet, dass man 3,3'-Diamino-4,4'-di- oxy-5,5'-dimethyl-diphenylsulfon tetrazotiert und mit 2 Molekülen Pheny l-2-amino-5- naphtol-7-sulfosäure kuppelt. Der getrocknete Farbstoff ist ein dunkel bronziges Pulver, das sich in Wasser mit blauvioletter, in Schwefelsäure mit rot violetter Farbe löst. PATENT CLAIM: Process for the preparation of a direct disazo dye, characterized in that 3,3'-diamino-4,4'-di-oxy-5,5'-dimethyl-diphenylsulfone is tetrazotized and 2 molecules of phenyl-2- amino-5-naphthol-7-sulfonic acid couples. The dried dye is a dark bronzy powder that dissolves in water with a blue-violet color, in sulfuric acid with a red-violet color. Er lässt sich auf Baum wolle direkt färben als Bordeauxrosa und geht beim Behandeln mit Kupfersalz in Violett über. Denselben Farbton erreicht man, wenn man das Kupfersalz des Farb stoffes verwendet. Die Ausfärbung ist von hervorragender Licht- und guter Wasch echtheit. It can be dyed directly on cotton as burgundy pink and turns violet when treated with copper salt. The same color is achieved if you use the copper salt of the dye. The color is extremely lightfast and washfast.
CH148016D 1928-11-15 1929-11-14 Process for the preparation of a direct disazo dye. CH148016A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148016X 1928-11-15
CH145155T 1929-11-14

Publications (1)

Publication Number Publication Date
CH148016A true CH148016A (en) 1931-06-30

Family

ID=25714628

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148016D CH148016A (en) 1928-11-15 1929-11-14 Process for the preparation of a direct disazo dye.

Country Status (1)

Country Link
CH (1) CH148016A (en)

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