CH193231A - 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
CH193231A
CH193231A CH193231DA CH193231A CH 193231 A CH193231 A CH 193231A CH 193231D A CH193231D A CH 193231DA CH 193231 A CH193231 A CH 193231A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
blue
dyeings
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 CH193231A publication Critical patent/CH193231A/en

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  'Verfahren zur Darstellung eines     o-Ozyazofarbstoffes.       Es wurde gefunden, dass durch Kuppeln  von dianotiertem     4-Ohlor-6-nitro-2-amino-l-          oxybenzol        mit2-Phenylarnino-6-oxynaphthalin-          8-sulfonsäure    ein Farbstoff erhalten wird, der  durch     Nachchromieren    der in saurem Bade  entstehenden Färbungen gleichmässige, graue  Färbungen von ausgezeichneten Echtheitsei  genschaften liefert.  



       Beispiel:     19,0 kg     4-Chlor-6-nitro-2-amino-l-ogyben-          zol    werden nach üblichem Verfahren dianotiert.  Die     Diazolösung    fliesst zu einer Lösung von  31,     "o    kg     2-Pherrylamino-6-oxynaphthalin-8-sul-          fonsäure    in 200 Liter Wasser und 14 kg     Na-          triumcarbonat.    Nach beendeter     Kupplung    wird  der ausgeschiedene Farbstoff     abfiltriert    und ge  trocknet. Er bildet ein dunkles Pulver, das  sich in Wasser blau und in konzentrierter  Schwefelsäure rotviolett löst. Er färbt Wolle    aus saurem Bade grünblau.

   Beim     Nachebro-          mieren    der Färbung wird ein lichtechtes Grau  erhalten.



  Process for the preparation of an o-ozyazo dye. It has been found that by coupling dianotized 4-chloro-6-nitro-2-amino-l-oxybenzene with 2-phenylamino-6-oxynaphthalene-8-sulfonic acid, a dye is obtained which, by after-chromating the colorations produced in acidic baths, is uniform , gray dyeings with excellent fastness properties.



       Example: 19.0 kg of 4-chloro-6-nitro-2-amino-1-ogybenzene are dianotized according to the usual method. The diazo solution flows into a solution of 31.0 kg of 2-pherrylamino-6-oxynaphthalene-8-sulphonic acid in 200 liters of water and 14 kg of sodium carbonate. When the coupling is complete, the dye which has separated out is filtered off and dried. It forms a dark powder that dissolves blue in water and red-violet in concentrated sulfuric acid, it dyes wool from acidic baths green-blue.

   A lightfast gray is obtained when the dye is post-chromated.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachcbromieren der in saurem Bade entstehenden Färbungen gleichmässige graue Färbungen von ausge zeichneten Echtbeitseigenschafterr liefert, da durch gekennzeichnet, dass man 4-Ohlor-6- nitro-2-diazo-l-ogybenzol mit 2-Phenylamino- 6-oxyrraphth@klin-8-sLrlfonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxy-azo dye which, by post-brominating the dyeings in an acidic bath, provides uniform gray dyeings with excellent real working properties, characterized in that 4-Ohlor-6-nitro-2-diazo-l- ogybenzene couples with 2-phenylamino-6-oxyrraphth @ klin-8-slrlfonic acid. Der neue Farbstoff stellt getrocknet ein dunkles Pulver dar, das sich in Wasser blau und in konzentrierter Schwefelsäure rotviolett löst; er färbt Wolle aus saurem Bade grünblau, beim Nachchromieren der Färbung erhält man ein Grau von ausgezeichneten Echtheitseigen schaften. When dried, the new dye is a dark powder that dissolves blue in water and red-violet in concentrated sulfuric acid; it dyes wool from acidic baths green-blue; when the dye is re-chromed, a gray with excellent fastness properties is obtained.
CH193231D 1935-08-24 1937-01-05 Process for the preparation of an o-oxyazo dye. CH193231A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH184880T 1935-08-24
DE193231X 1936-05-06

Publications (1)

Publication Number Publication Date
CH193231A true CH193231A (en) 1937-09-30

Family

ID=25721105

Family Applications (1)

Application Number Title Priority Date Filing Date
CH193231D CH193231A (en) 1935-08-24 1937-01-05 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH193231A (en)

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