CH134103A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH134103A
CH134103A CH134103DA CH134103A CH 134103 A CH134103 A CH 134103A CH 134103D A CH134103D A CH 134103DA CH 134103 A CH134103 A CH 134103A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
azo dye
carboxylic acid
naphthylamide
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH134103A publication Critical patent/CH134103A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

         

  Verfahren zur Darstellung eines     Azofarbstoffes.       Es hat sich gezeigt, dass man zu     Azofarb-          stoffen    von sehr guten Echtheitseigenschaften  gelangt, wenn man     diazotierte        Dihalogen-          derivate    des     m-Toluidins    mit gewissen     Aryl-          amiden    der     2-Oxynaphtalin-3-carbonsäure     kuppelt.  



  Gegenstand der     vorliegenden    Erfindung  ist nun ein Verfahren zur Darstellung eines       Azofarbstoffes,    der folgenden Formel  
EMI0001.0013     
    den man durch Kupplung der     Diazoverbindung     des     1-Amino-4.        6-dichlor-3-methylbenzols    mit  2 -     Oxynaphtalin-3-carbonsäure-ss-naphtylamid     erhält.  



       Beispiel:     Die aus 3,52 kg     1-Amino-4.        6-dichlor-3-          methylbenzol    in üblicher Weise dargestellte         Diazoverbindung    lässt man unter Rühren in  eine wässerige Suspension von 6,3 kg     2-          Oxynaphtalin    - 3 -     carbonsäure-ss-naphtylamid,     bereitet durch Auflösen desselben in Natron  lauge und Wiederausfällen mit verdünnter  Essigsäure, einlaufen. Der     Farbstoff    scheidet  sich als roter Niederschlag aus. Er wird fil  triert; gewaschen und getrocknet. Der Farb  stoff ist ein Entwicklungsfarbstoff.

   Er gibt,  auf der Faser erzeugt; sehr gut lichtechte,  ganz vorzüglich     laugenkochechte    blaustichig  rote Töne.



  Process for the preparation of an azo dye. It has been shown that azo dyes with very good fastness properties can be obtained if diazotized dihalogen derivatives of m-toluidine are coupled with certain aryl amides of 2-oxynaphthalene-3-carboxylic acid.



  The present invention now relates to a process for the preparation of an azo dye of the following formula
EMI0001.0013
    which one by coupling the diazo compound of 1-amino-4. 6-dichloro-3-methylbenzene with 2-oxynaphthalene-3-carboxylic acid-ß-naphthylamide is obtained.



       Example: The one from 3.52 kg of 1-amino-4. 6-dichloro-3-methylbenzene prepared in the usual way diazo compound is left with stirring in an aqueous suspension of 6.3 kg of 2- oxynaphthalene - 3 - carboxylic acid-ss-naphthylamide, prepared by dissolving the same in sodium hydroxide solution and reprecipitation with dilute acetic acid, come in. The dye separates out as a red precipitate. He is filtered; washed and dried. The dye is a developing dye.

   He gives, created on the fiber; very good lightfast, very excellent caustic blueish red tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes der folgenden Formel EMI0001.0031 dadurch gekennzeichnet, dass man die Diazo- verbindung von 1-Amino-4.6-dichlor-3-methyl- benzol mit 2-Ugynaphtalin-3-carbonsäure-ss- naphtylamid kuppelt. Der Farbstoff ist ein Entwicklungsfarbstoff und stellt in Substanz ein rotes Pulver dar. PATENT CLAIM: Process for the preparation of an azo dye of the following formula EMI0001.0031 characterized in that the diazo compound of 1-amino-4,6-dichloro-3-methylbenzene is coupled with 2-ugynaphthalene-3-carboxylic acid-s-naphthylamide. The dye is a developing dye and in substance is a red powder. Er gibt, auf der Faser erzeugt, sehr gut lichtechte und vorzüglich laugenkochechte blaustichig rote Töne. Produced on the fiber, it gives very good lightfast and excellent caustic-proof blue-tinged red tones.
CH134103D 1927-03-21 1928-03-12 Process for the preparation of an azo dye. CH134103A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE134103X 1927-03-21

Publications (1)

Publication Number Publication Date
CH134103A true CH134103A (en) 1929-07-15

Family

ID=5665323

Family Applications (1)

Application Number Title Priority Date Filing Date
CH134103D CH134103A (en) 1927-03-21 1928-03-12 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH134103A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD801697S1 (en) 2015-09-11 2017-11-07 Trisa Holding Ag Toothbrush handle
USD822389S1 (en) 2017-01-03 2018-07-10 Trisa Holding Ag Toothbrush handle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD801697S1 (en) 2015-09-11 2017-11-07 Trisa Holding Ag Toothbrush handle
USD822389S1 (en) 2017-01-03 2018-07-10 Trisa Holding Ag Toothbrush handle

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