AT42404B - Process for the preparation of a monoazo dye for wool. - Google Patents

Process for the preparation of a monoazo dye for wool.

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Publication number
AT42404B
AT42404B AT42404DA AT42404B AT 42404 B AT42404 B AT 42404B AT 42404D A AT42404D A AT 42404DA AT 42404 B AT42404 B AT 42404B
Authority
AT
Austria
Prior art keywords
preparation
wool
monoazo dye
dye
dioxynaphthalene
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT42404B publication Critical patent/AT42404B/en

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  • Coloring (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur   Darstellnng   eines Monoazofarbstoffes für Wolle. 



   In der deutschon Patentschrift Nr. 120690 ist ein Verfahren zur Darstellung von Azofarbstoffen beschrieben, die aus diazotierten   Schwefligsäureestern   von Aminophenolen gewonnen werden und dadurch charakterisiert sind, dass sie eine Schwefligsäurephenolestergruppe   enthalten.   Von Dioxyderivaten des Naphtalins wird in der genannten Patentschrift nur das 2. 3-Dioxynaphialin als Komponente angeführt. Dieses liefert bei der Kombination 
 EMI1.1 
 Violett, das beim   Nachchrornieren   in Braun   übergeht.   



   Es wurde nun gefunden, dass durch Kuppeln des diazotierten Schwefligsäureesters des 1.8-Aminonaphtols mit 1.8-Dioxynaphtalin-4-sulfosäure und nachfolgendes Verseifen ein gut egalisierender Farbstoff entsteht, der Wolle in   lel) hafter violettor Nüance anfärht   und bei der 
 EMI1.2 
 Dioxynaphtalinsulfosäureüberlegen. 



   Beispiel. 



   223 Teile des Schwefligsäureesters des 1. 8-Aminonaphtols werden in Wasser gelöst 
 EMI1.3 
 stofffälltquantitativaus. 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of a monoazo dye for wool.



   The German patent specification No. 120690 describes a process for the preparation of azo dyes which are obtained from diazotized sulfuric acid esters of aminophenols and are characterized in that they contain a sulfurous acid phenol ester group. Of the dioxy derivatives of naphthalene, only the 2,3-dioxynaphialine is listed as a component in the patent mentioned. This delivers when combined
 EMI1.1
 Violet that changes to brown when re-chromed.



   It has now been found that by coupling the diazotized sulfuric acid ester of 1.8-aminonaphthol with 1.8-dioxynaphthalene-4-sulfonic acid and subsequent saponification, a dye that is well equalizing is produced which stains the wool in a lel) violet shade and in the
 EMI1.2
 Dioxynaphthalene sulfonic acid superior.



   Example.



   223 parts of the sulfurous acid ester of 1,8-aminonaphthol are dissolved in water
 EMI1.3
 substance is quantitative.

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

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung eines die Wolle violett, beim Nachchromieren violettschwarz färbenden Monoazofarbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung des Schwefligsäureesters des 1.8-Aminonaphtols mit 1. 8-Dioxynaphtalin-4-sulfosäure kuppelt und aus dem entstandenen Farbstoff den Schwefligsäurerest abspaltet. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: A process for the preparation of a monoazo dye which stains the wool violet and purple-black when re-chroming, characterized in that the diazo compound of the sulfuric acid ester of 1,8-aminonaphthol is coupled with 1,8-dioxynaphthalene-4-sulfonic acid and the sulfurous acid residue is split off from the resulting dye. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT42404D 1908-02-24 1909-02-11 Process for the preparation of a monoazo dye for wool. AT42404B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE42404X 1908-02-24

Publications (1)

Publication Number Publication Date
AT42404B true AT42404B (en) 1910-05-25

Family

ID=5624050

Family Applications (1)

Application Number Title Priority Date Filing Date
AT42404D AT42404B (en) 1908-02-24 1909-02-11 Process for the preparation of a monoazo dye for wool.

Country Status (1)

Country Link
AT (1) AT42404B (en)

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