CH194083A - 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
CH194083A
CH194083A CH194083DA CH194083A CH 194083 A CH194083 A CH 194083A CH 194083D A CH194083D A CH 194083DA CH 194083 A CH194083 A CH 194083A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
dyeings
fastness properties
oxyazo
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 CH194083A publication Critical patent/CH194083A/en

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Description

  

  Verfahren zur Darstellung eines     o-Ogyazofar        bstoffes.       Es wurde gefunden, dass durch Kuppeln  von     diazotiertem        4,6-Dichlor-2-amino-l-oxy-          benzol    mit     2-Phenylamino-6-oxynaphtbalin-8-          sulfonsäure    ein Farbstoff erhalten wird, der  durch     Nachchromieren    der in saurem -Bade  entstehenden Färbungen gleichmässige, graue  Färbungen von ausgezeichneten Echtheits  eigenschaften liefert.

           Beispiel:       17,8 Teile     4,6-Dichlor-2-amino-l-oxyben-          zol    werden wie üblich     diazotiert    und mit  31,5 Teilen     2-Phenylamino-6-oxynaphthalin-          8-srrlfonsäure,    hergestellt in bekannter Weise  durch     Phenylieren    von     2-Amirro-6-oxynaph-          thalin-8-srrlfonsäure,    in schwach     sodaalkali-          scher    Lösung in Gegenwart von     Pyridin    ge  kuppelt.

   Nach beendeter Kupplung wird der       Farbstoff        abfiltriert    und getrocknet. Er stellt  ein dunkles Pulver dar, das sich in     Wasser     blau und in konzentrierter Schwefelsäure rot-    violett löst. Der     Farbstoff    färbt Wolle aus  saurem Bade grün, beim     Nacbcbromieren    der  Färbung erhält man ein Grau von ausge  zeichneten Echtheitseigenschaften.



  Process for the preparation of an o-ogyazo color. It has been found that by coupling diazotized 4,6-dichloro-2-amino-1-oxybenzene with 2-phenylamino-6-oxynaphthaline-8-sulfonic acid, a dye is obtained which is produced by after-chromating in an acidic bath Dyeings provides uniform, gray dyeings with excellent fastness properties.

           Example: 17.8 parts of 4,6-dichloro-2-amino-1-oxyben- zene are diazotized as usual and mixed with 31.5 parts of 2-phenylamino-6-oxynaphthalene-8-sulfonic acid, prepared in a known manner by phenylating 2-Amirro-6-oxynaphthalene-8-sulfonic acid, coupled in a weakly alkaline soda solution in the presence of pyridine.

   When the coupling has ended, the dye is filtered off and dried. It is a dark powder that dissolves blue in water and red-violet in concentrated sulfuric acid. The dye dyes wool from an acidic bath green; when the dyeing is post-brominated, a gray with excellent fastness properties is obtained.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines o-Oxy- azofarbstoffes, der durch Nachchromieren der in saurem Bade entstehenden Färbungen gleichmässige graue Färbungen von ausge zeichneten Echtheitseigenschaften liefert, da durch gekennzeichnet, dass man 4,6-Dichlor- 2-diazo-l-oxybenzol mit 2-Phenylamino-6-oxy- naphthalin-8-sulfonsäure kuppelt. PATENT CLAIM: Process for the preparation of an o-oxy-azo dye which, by re-chroming the dyeings in an acid bath, provides uniform gray dyeings with excellent fastness properties, characterized in that 4,6-dichloro-2-diazo-l-oxybenzene is used 2-phenylamino-6-oxynaphthalene-8-sulfonic acid couples. Der neue Farbstoff stellt getrocknet ein dunkles Pul ver dar, das sich in Wasser blau und in konzentrierter Schwefelsäure rotviolett löst; er färbt Wolle aus saurem Bade grün, 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 an acidic bath green; after chroming the dyeing, a gray with excellent fastness properties is obtained.
CH194083D 1935-08-24 1937-01-05 Process for the preparation of an o-oxyazo dye. CH194083A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH184880T 1935-08-24
DE194083X 1936-05-06

Publications (1)

Publication Number Publication Date
CH194083A true CH194083A (en) 1937-11-15

Family

ID=25721107

Family Applications (1)

Application Number Title Priority Date Filing Date
CH194083D CH194083A (en) 1935-08-24 1937-01-05 Process for the preparation of an o-oxyazo dye.

Country Status (1)

Country Link
CH (1) CH194083A (en)

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