AT37562B - Process for the preparation of secondary disazo dyes. - Google Patents

Process for the preparation of secondary disazo dyes.

Info

Publication number
AT37562B
AT37562B AT37562DA AT37562B AT 37562 B AT37562 B AT 37562B AT 37562D A AT37562D A AT 37562DA AT 37562 B AT37562 B AT 37562B
Authority
AT
Austria
Prior art keywords
preparation
disazo dyes
secondary disazo
diazotized
coupling
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
Priority claimed from DE1907199175D external-priority patent/DE199175C/de
Application filed by Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT37562B publication Critical patent/AT37562B/en

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  • Photoreceptors In Electrophotography (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 
 EMI1.2 
 

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 Lösung von 319 Teilen   2-Amino-5-naphtol-1.     7-disulfosäure   in so viel Soda, dass die Reaktion bis zur Beendigung der Kupplung alkalisch bleibt.   Der Farbstoff färbt ungeheizte   Baumwolle in blauen Tönen an.



   <Desc / Clms Page number 1>
 
 EMI1.1
 
 EMI1.2
 

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 Solution of 319 parts of 2-amino-5-naphtol-1. 7-disulfonic acid in enough soda that the reaction remains alkaline until the coupling is complete. The dye stains unheated cotton in blue tones.

Claims (1)

PATENT-ANSPRUCH : Abänderung des durch Stammpatent Nr. 37561 geschützten Verfahrens zur Darstellung von sekundären Disazofarbstoffen, dadurch gekennzeichnet, dass man statt der diazotierten EMI2.1 verbindungen oder des diazotierten 1.8-Aminonaphtols selbst verwendet und dru Schweflig- säurerest entweder nach erfolgter Kupplung mit den Mittelkomponcnten aus den Zwischen- produkten, oder erst nach weiterer Kupplung mit den Endkomponenten aus den fertigen Disazofarbstuffen abspaltet. PATENT CLAIM: Modification of the process for the preparation of secondary disazo dyes, protected by parent patent No. 37561, characterized in that instead of the diazotized EMI2.1 compounds or the diazotized 1,8-aminonaphthol itself is used and the sulfuric acid residue is split off either after coupling with the middle components from the intermediate products, or only after further coupling with the end components from the finished disazo dyes.
AT37562D 1907-04-10 1908-06-13 Process for the preparation of secondary disazo dyes. AT37562B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1907199175D DE199175C (en) 1907-04-10

Publications (1)

Publication Number Publication Date
AT37562B true AT37562B (en) 1909-06-11

Family

ID=5757406

Family Applications (1)

Application Number Title Priority Date Filing Date
AT37562D AT37562B (en) 1907-04-10 1908-06-13 Process for the preparation of secondary disazo dyes.

Country Status (1)

Country Link
AT (1) AT37562B (en)

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