AT51208B - Process for the preparation of a red azo dye suitable for the preparation of lightfast paints. - Google Patents

Process for the preparation of a red azo dye suitable for the preparation of lightfast paints.

Info

Publication number
AT51208B
AT51208B AT51208DA AT51208B AT 51208 B AT51208 B AT 51208B AT 51208D A AT51208D A AT 51208DA AT 51208 B AT51208 B AT 51208B
Authority
AT
Austria
Prior art keywords
preparation
azo dye
lightfast
paints
dye suitable
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 AT51208B publication Critical patent/AT51208B/en

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  • Paints Or Removers (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
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 und 30 Teilen Salzsäure von 20  Bé diazotiert und unter   Rühren   eingetragen in eine   Lösung von 23#5 Teilen des neutralen Natronsalzes   der ss-Oxynaphtoesäure und 20 Teilen Soda. Die Kupplung ist sehr   sehnell vollendet. Dann erwärmt man gelinde und filtriert   den   FarhstoS ab.   In trockener Form bildet er ein rotes Pulver, welches in Wasser nur schwer und in   Alkohol nicht löslich   ist. In konzentrierter Schwefelsäure löst er sich mit   blanroter   Farbe. Die Kalzium- und Bariumsalze des Farbstoffs sind in Wasser unlöslich. 

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



   <Desc / Clms Page number 1>
 
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 and 30 parts of hydrochloric acid diazotized by 20 Bé and introduced with stirring into a solution of 23 # 5 parts of the neutral sodium salt of β-oxynaphtoic acid and 20 parts of soda. The coupling is very tight. Then warm up gently and filter off the substance. In dry form it forms a red powder which is difficult to dissolve in water and not soluble in alcohol. In concentrated sulfuric acid it dissolves with a reddish color. The calcium and barium salts of the dye are insoluble in water.

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

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Herstellung eines für die Bereitung von I. acken geeigneten blauroten Azofarbstoffs, dadurch gekennzeichnet, dass man die Diazoverbindung der 5-Nitro-2-amino- - 1-benzylsulfosäure mit ss-Oxynaphtoesäure umsetzt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of a bluish-red azo dye suitable for the preparation of I. acken, characterized in that the diazo compound of 5-nitro-2-amino- - 1-benzylsulphonic acid is reacted with β-oxynaphthoic acid. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT51208D 1909-10-21 1910-09-23 Process for the preparation of a red azo dye suitable for the preparation of lightfast paints. AT51208B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE51208X 1909-10-21

Publications (1)

Publication Number Publication Date
AT51208B true AT51208B (en) 1911-12-11

Family

ID=5626914

Family Applications (1)

Application Number Title Priority Date Filing Date
AT51208D AT51208B (en) 1909-10-21 1910-09-23 Process for the preparation of a red azo dye suitable for the preparation of lightfast paints.

Country Status (1)

Country Link
AT (1) AT51208B (en)

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