CH187341A - Process for the preparation of an o-oxyazo dye. - Google Patents

Process for the preparation of an o-oxyazo dye.

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Publication number
CH187341A
CH187341A CH187341DA CH187341A CH 187341 A CH187341 A CH 187341A CH 187341D A CH187341D A CH 187341DA CH 187341 A CH187341 A CH 187341A
Authority
CH
Switzerland
Prior art keywords
blue
dye
preparation
oxyazo
gray
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH187341A publication Critical patent/CH187341A/en

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Description

  

  Verfahren zur     Darstellung    eines     o-Ozyazofar        bstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        4,6-Dichlor-2-amino-l-oxy-          benzol    mit     2-Benzoylamino-6-oxynaphthalin-          8-sulfonsäure    ein Farbstoff erhalten wird, der  durch     Nachchromieren    der in saurem Bade  entstehenden Färbungen gleichmässige, blau  graue Färbungen von ausgezeichneten Echt  heitseigenschaften liefert.  



       Beispiel:     18 kg     4,6-Dichlor-2-amino-l-oxybenzol     werden wie üblich     diazotiert.    Die     Diazolösung     gibt man zu einer     sodaalkalischen    Lösung  von 34,3 kg     2-Benzoylamino-6-oxynaphtbalin-          8-sulfonsäure.    Nach beendeter Kupplung  wird     filtriert.    Der Farbstoff, ein blaues Pulver,  löst sich in Wasser essigsauer blaurot,     soda-          alkalisch    blau und in konzentrierter Schwefel  säure violett. Er färbt Wolle aus saurem  Bade blauviolett. Die     nachchromierte    Färbung    ist blaugrau.

   Sie besitzt sehr gute Echtheits  eigenschaften.



  Process for the preparation of an o-ozyazo dye. It has been found that by coupling diazotized 4,6-dichloro-2-amino-1-oxybenzene with 2-benzoylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which can be obtained by chromating the colorations produced in an acidic bath provides uniform, blue-gray colorations with excellent fastness properties.



       Example: 18 kg of 4,6-dichloro-2-amino-1-oxybenzene are diazotized as usual. The diazo solution is added to a soda-alkaline solution of 34.3 kg of 2-benzoylamino-6-oxynaphthalene-8-sulfonic acid. After the coupling has ended, it is filtered. The dye, a blue powder, dissolves in water in acetic acid blue-red, soda-alkaline blue and in concentrated sulfuric acid violet. He dyes wool from an acid bath blue-violet. The chromium-plated color is blue-gray.

   It has very good fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxyazo- farbstoffes, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige, blaugraue Färbungen von aus gezeichneten Echtheitseigenschaften liefert, dadurch gekennzeichnet, dass man 4,6-Dichlor- 2-diazo-l-oxybenzol mit 2-Benzoylamino-6- oxynaphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxyazo dye which, by after-chroming the dyeings in an acidic bath, provides uniform, blue-gray dyeings with excellent fastness properties, characterized in that 4,6-dichloro-2-diazo-1-oxybenzene is added 2-Benzoylamino-6-oxynaphthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein blaues Pulver dar, das sich in verdünnter Essig säure blaurot, in verdünnter Natriumcarbonat- lösung blau und in konzentrierter Schwefel säure violett löst; er färbt Wolle aus saurem Bade blauviolett, beim Nachchromieren der Färbung erhält man ein Blaugrau von aus gezeichneten Echtheitseigenschaften. " When dried, the new dye is a blue powder that dissolves in dilute acetic acid blue-red, in dilute sodium carbonate solution blue and in concentrated sulfuric acid violet; it dyes wool from an acidic bath blue-violet; when the dyeing is re-chromed, a blue-gray with excellent fastness properties is obtained. "
CH187341D 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye. CH187341A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE187341X 1934-11-10
CH184880T 1935-08-24

Publications (1)

Publication Number Publication Date
CH187341A true CH187341A (en) 1936-10-31

Family

ID=25721100

Family Applications (1)

Application Number Title Priority Date Filing Date
CH187341D CH187341A (en) 1934-11-10 1935-08-24 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH187341A (en)

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