CH148014A - 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
CH148014A
CH148014A CH148014DA CH148014A CH 148014 A CH148014 A CH 148014A CH 148014D A CH148014D A CH 148014DA CH 148014 A CH148014 A CH 148014A
Authority
CH
Switzerland
Prior art keywords
dye
direct
preparation
disazo dye
color
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 CH148014A publication Critical patent/CH148014A/en

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Description

  

  Verfahren zur Darstellung eines direkt ziehenden     Disazofarbstoffes.       Es wurde gefunden, dass man einen neuen  direkt ziehenden     Disazofarbstoff    erhält,     wenn     man     tetrazotiertes        3,3'-Diamino-4,4'-dioxydi-          phenylsulfon    mit 2 Molekülen     p-Phenetidyl-          2-amirio-5-naphtol-7-sulfosäure    kuppelt.  



       Beispiel:     28 Teile     3,3'-Diamirio-4,4'-dioxy-diphenyl-          sulfon    werden salzsauer unter Zusatz von Eis  mit 14 Teilen     Natriumnitrit        tetrazotiert    und       reit    70 Teilen     p-Phenetidyl-2-ainino-5-naphtol-          7-sulfosäure        sodaalkalisch    gekuppelt. Man  lässt 24 Stunden rühren, erwärmt und salzt aus.  



  Der getrocknete     Farbstoff    ist ein     dunkel-          bronziges    Pulver, das sich in Wasser mit  blauvioletter, in Schwefelsäure mit rotvioletter  Farbe löst. Er lässt sich auf Baumwolle direkt  färben als Bordeauxrosa und geht beim Be  handeln mit Kupfersulfat in Violett über.  Denselben Farbton erreicht man, wenn man  das Kupfersalz des     Farbstoffes    verwendet. Die    Ausfärbung ist von hervorragender Licht- und  guter Waschechtheit.



  Process for the preparation of a direct disazo dye. It has been found that a new direct disazo dye is obtained if tetrazotized 3,3'-diamino-4,4'-dioxydiphenylsulfone is coupled with 2 molecules of p-phenetidyl-2-aminio-5-naphthol-7-sulfonic acid .



       Example: 28 parts of 3,3'-diamirio-4,4'-dioxy-diphenylsulfone are tetrazotized with 14 parts of sodium nitrite and 70 parts of p-phenetidyl-2-ainino-5-naphtol- 7- sulfonic acid coupled to alkaline soda. The mixture is stirred for 24 hours, heated 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 shade of color can be achieved using the copper salt of the dye. The color is extremely lightfast and washfast.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines direkt ziehenden Disazofarbstoffes, dadurch gekenn zeichnet, dass man 3,3'-Diamino-4,4'-dioxy- diphenylsulfon tetrazotiert und mit 2 Mole külen p-Phenetidyl-2-amino-5-naphtol-7-sulfo- säure kuppelt. Der getrocknete Farbstoff ist ein dunkel- bronziges Pulver, das sich in Wasser mit blauvioletter, in Schwefelsäure mit rotvioletter Farbe löst. Er lässt sich auf Baumwolle direkt färben als Bordeauxrosa und geht beim Be handeln mit Kupfersulfat in Violett über. Denselben Farbton erhält man, wenn man das Kupfersalz des Farbstoffes verwendet. PATENT CLAIM: Process for the preparation of a direct disazo dye, characterized in that 3,3'-diamino-4,4'-dioxydiphenylsulfone is tetrazotized and p-phenetidyl-2-amino-5-naphthol-7 with 2 mols -sulfonic acid couples. 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 shade is obtained when using the copper salt of the dye. Die Ausfärbung ist von hervorragender Licht- und guter Waschechtheit. The color is extremely lightfast and washfast.
CH148014D 1928-11-15 1929-11-14 Process for the preparation of a direct disazo dye. CH148014A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE148014X 1928-11-15
CH145155T 1929-11-14

Publications (1)

Publication Number Publication Date
CH148014A true CH148014A (en) 1931-06-30

Family

ID=25714626

Family Applications (1)

Application Number Title Priority Date Filing Date
CH148014D CH148014A (en) 1928-11-15 1929-11-14 Process for the preparation of a direct disazo dye.

Country Status (1)

Country Link
CH (1) CH148014A (en)

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