AT58782B - Process for the preparation of black basic disazo dyes. - Google Patents

Process for the preparation of black basic disazo dyes.

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Publication number
AT58782B
AT58782B AT58782DA AT58782B AT 58782 B AT58782 B AT 58782B AT 58782D A AT58782D A AT 58782DA AT 58782 B AT58782 B AT 58782B
Authority
AT
Austria
Prior art keywords
preparation
black
disazo dyes
black basic
dye
Prior art date
Application number
Other languages
German (de)
Original Assignee
Hoechst 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 Hoechst Ag filed Critical Hoechst Ag
Application granted granted Critical
Publication of AT58782B publication Critical patent/AT58782B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung schwarzer basischer Disazofarbstoffe. 



   Es wurde gefunden, dass ein wertvoller schwarzer basischer sekundärer Disazofarbstoff erhalten wird, wenn in dem Verfahren des Stammpatentes Nr. 58780 das dort zur Anwendung gebrachte 1. 8-Diaminonaphtalin durch 1.   5-Diaminonphtalin   ersetzt wird. 



   Der auf diese Weise gewonnene Farbstoff färbt Kunstseide im neutralen oder sauren Bade schön schwarz. Es ist das um   80   bemerkenswerter als der analoge Farbstoff der deutschen Patentschrift Nr. 109491   Aminophenyltrimethylammonium # Aminohydrochinon-     dimethyläther # 1.5-Aminonaphtol   nur blaue Färbungen erreichen lässt. 



   Die diesem Farbstoff analogen Kombinationen mit anderen primären Basen, zum Beispiel   p-Xylidin, Aminokresoläther   in Mittelstellung und 1. 5-Diaminonaphtalin in Endstellung färben braun, ähnlich den mit m-Diaminen zusammengesetzten bekannten Kom-   binationen.   



   Es war demnach nicht vorauszusehen, dass dieser Farbstoff ein für die Kunstseide-   f, irbung wertvolles Schwarz   sein würde, dessen Herstellung einen wesentlichen Fortschritt bedeutet. 
 EMI1.1 
 säure (190   Be)   und   etwa 600 l Wasser.   



   Die Kupplung beginnt in der   salzsauren     Lösung. Sie   wird beschleunigt dur   h Abstumpfen   der überschüss gen freien Mineralsäure mittels Natriumazetat. Nach kurzem Rühren wird dann auf 40 bis   50    erwärmt und der Farbstoff durch Zusatz von   Kochsalzlösung und wenig   Chlorzink in kristalliniseher Form abgeschieden. Er ist ein schwarzes Pulver und   färbt   Chardonnetseide schön tiefschwarz. Die Färbung ist   waschecht.   

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the preparation of black basic disazo dyes.



   It has been found that a valuable black basic secondary disazo dye is obtained if in the process of parent patent no. 58780 the 1,8-diaminonaphthalene used there is replaced by 1,5-diaminonaphthalene.



   The dye obtained in this way colors artificial silk beautifully black in a neutral or acid bath. It is 80% more remarkable than the analogous dye in German patent specification No. 109491 aminophenyltrimethylammonium # aminohydroquinone dimethyl ether # 1.5-aminonaphtol only produces blue colorations.



   The combinations analogous to this dye with other primary bases, for example p-xylidine, aminocresol ether in the middle position and 1,5-diaminonaphthalene in the end position color brown, similar to the known combinations composed of m-diamines.



   It was therefore impossible to foresee that this dye would be a valuable black for artificial silk, the production of which would represent a major advance.
 EMI1.1
 acid (190 Be) and about 600 l of water.



   The coupling begins in the hydrochloric acid solution. It is accelerated by blunting the excess free mineral acid with sodium acetate. After brief stirring, the mixture is then heated to 40 to 50 and the dye is precipitated in crystalline form by adding sodium chloride solution and a little zinc chloride. It is a black powder and colors Chardonnese silk beautifully deep black. The color is washable.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Abänderung des Verfahrens des Stammpatentes Nr. 58780, dadurch gekennzeichnet, dass EMI1.2 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Modification of the process of the parent patent No. 58780, characterized in that EMI1.2 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT58782D 1910-10-12 1911-09-20 Process for the preparation of black basic disazo dyes. AT58782B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE58780X 1910-10-12
DE58782X 1910-12-31

Publications (1)

Publication Number Publication Date
AT58782B true AT58782B (en) 1913-04-25

Family

ID=25749269

Family Applications (1)

Application Number Title Priority Date Filing Date
AT58782D AT58782B (en) 1910-10-12 1911-09-20 Process for the preparation of black basic disazo dyes.

Country Status (1)

Country Link
AT (1) AT58782B (en)

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