AT47154B - Process for the preparation of yellow disazo dyes for wool. - Google Patents

Process for the preparation of yellow disazo dyes for wool.

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Publication number
AT47154B
AT47154B AT47154DA AT47154B AT 47154 B AT47154 B AT 47154B AT 47154D A AT47154D A AT 47154DA AT 47154 B AT47154 B AT 47154B
Authority
AT
Austria
Prior art keywords
wool
preparation
disazo dyes
yellow disazo
dyes
Prior art date
Application number
Other languages
German (de)
Original Assignee
Griesheim Elektron Chem Fab
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 Griesheim Elektron Chem Fab filed Critical Griesheim Elektron Chem Fab
Application granted granted Critical
Publication of AT47154B publication Critical patent/AT47154B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung gelber Disazofarbstoffe für Wolle. Es wurde gefunden, dass durch Kombination der   Tetrazoverbindnng   des m-Dichlor- benzidin der lionstitution 
 EMI1.1 
 mit 2 Molekülen 1-Sulfoaryl-3-methyl-5-pyrazolon Disazofarbstoffe entstehen, welche sich vor den bekannten Farbstoffen aus 1-Sulfoary-3-methyl-5-pyrazolon dadurch auszeichnen, dass sie die Wolle in gelben Nüancen anfürben, welche auch ohne Nachbehandlung mit Chromsalzen gegen weisse Wolle und Baumwolle   walkccht   sind. Dieses Resultat konnte nicht vorausgesehen werden.

   Zwar sind in der deutschen Patentschrift Nr. 160675 Disazofarb- 
 EMI1.2 
   Walkechthnit   von   WoHfarbstoffcn die SteHung   der Sulfogruppe   tm     Farbstoffmoiekil mass-   gebend ist, und schon die Benzidin-o-disulfosäure wesentlich andere Resultate liefert, wie die Benzidin-m-disolfosüure, so konnten die angaben der deutschen Patentschrift Nr. 160675 keine   Anhaltspunkte   für die Beurteilung der Farbstoffe aus einem nicht sulfurierten Diamin bieten. 



   Das gleiche gilt für die deutsche Patentschrift Nr. 196989. Der daselbst beschriebene Farbstoff aus m-Dichlorhenzidin und 2 Molekülen 2-Naphtol-3 : 6-disulfosäure ist für einen Vergleich von den vorliegenden doch zu verschieden. und zu der Annahme. dass etwa alle Disazofarbstoffe aus m-Dichlorbenzidin walkecht seien. berechtigten die Angaben dieser Patentschrift nicht im mindesten 
Beispiel : 
 EMI1.3 




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  Process for the preparation of yellow disazo dyes for wool. It has been found that by combining the tetrazo compound of m-dichlorobenzidine, the lionstitution
 EMI1.1
 With 2 molecules of 1-sulfoaryl-3-methyl-5-pyrazolone disazo dyes are formed, which distinguish themselves from the known dyes from 1-sulfoary-3-methyl-5-pyrazolone in that they dye the wool in yellow shades, which also without After-treatment with chromium salts against white wool and cotton. This result could not be foreseen.

   Although in the German patent no. 160675 disazo color
 EMI1.2
   Milling fasthnite of where the position of the sulfo group to the dye molecule is decisive, and even benzidine-o-disulfonic acid gives significantly different results than benzidine-m-disulfonic acid, the information in German patent specification No. 160675 could not provide any clues for the assessment of the dyes from a non-sulfurized diamine.



   The same applies to German patent specification No. 196989. The dye described there, composed of m-dichlorohenzidine and 2 molecules of 2-naphthol-3: 6-disulfonic acid, is too different from the present ones for comparison. and to the assumption. that about all disazo dyes made from m-dichlorobenzidine are stable to water. do not justify the information in this patent specification in the least
Example:
 EMI1.3

Claims (1)

PATENT. ANSPRUCH : Verfahren zur Darstellung gelber Disazofarbstoffe für Wolle, dadurch gekennzeichnet, EMI2.1 PATENT. CLAIM: Process for the preparation of yellow disazo dyes for wool, characterized in that EMI2.1
AT47154D 1909-05-15 1910-04-23 Process for the preparation of yellow disazo dyes for wool. AT47154B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE47154X 1909-05-15

Publications (1)

Publication Number Publication Date
AT47154B true AT47154B (en) 1911-03-27

Family

ID=5625540

Family Applications (1)

Application Number Title Priority Date Filing Date
AT47154D AT47154B (en) 1909-05-15 1910-04-23 Process for the preparation of yellow disazo dyes for wool.

Country Status (1)

Country Link
AT (1) AT47154B (en)

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