AT56178B - Process for the production of azo dyes. - Google Patents

Process for the production of azo dyes.

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Publication number
AT56178B
AT56178B AT56178DA AT56178B AT 56178 B AT56178 B AT 56178B AT 56178D A AT56178D A AT 56178DA AT 56178 B AT56178 B AT 56178B
Authority
AT
Austria
Prior art keywords
production
azo dyes
desc
brown
dyes
Prior art date
Application number
Other languages
German (de)
Original Assignee
Farbenfab Vorm Bayer F & Co
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 Farbenfab Vorm Bayer F & Co filed Critical Farbenfab Vorm Bayer F & Co
Application granted granted Critical
Publication of AT56178B publication Critical patent/AT56178B/en

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Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Herstellung von Azofarbstoffen. 



   Es wurde gefunden,   dass   der Farbstoff aus der Tetrazoverbindung der p-p'-Diaminodiphenylharnstoff-m-m'-disulfosäure des D. R. P. Nr. 140613 mit zwei Molekülen m-Phenylendiamin vorzüglich geeignet ist, auf der Faser durch Nachbehandlung mit   diazotiertem     -Nitranitin   ein weiss ätzbares, waschechtes, sehr gut lichtechtes Rotbraun zu liefern, das sich vor den mit den Farbstoffen des   D.   R. P.   NI'. 216685 erhältlichen, auf der   Faser 
 EMI1.1 
 echtheit auszeichnet. Bei der bekannten Lichtunechtheit der Chrysoidine war dieses Verhalten in keiner Weise vorauszusehen. 



   Beispiel. 



   402TeilederTetrazoverbindungausderp-p'-Diaminodiphenylharnstoff-m-m'-disulfosaure des D. R. P. Nr. 140613 werden in   schwach alkalischer Lösung mit 21s Teilen     m-Phenylendiamin zum Farbstoff gekuppelt; derselbe gibt auf Baumwolle direkt ein Gelb-     braun, bei Nachbehandlung   mit diazotiertem   p-Kitranllin   ein sehr   schönes.   volles Rotbraun von guter Wäsche, Ätzbarkeit und grosser Lichtechtheit. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Process for the production of azo dyes.



   It has been found that the dye from the tetrazo compound of p-p'-diaminodiphenylurea-m-m'-disulfonic acid of DRP No. 140613 with two molecules of m-phenylenediamine is extremely suitable, and the fiber becomes white after treatment with diazotized -nitranitine to deliver etchable, washable, very lightfast reddish brown, which stands out against the dyes of the DRP NI '. 216685 available on the fiber
 EMI1.1
 authenticity. Given the well-known light infastness of the chrysoidins, this behavior could in no way be foreseen.



   Example.



   402 parts of the tetrazo compound from the p-p'-diaminodiphenylurea-m-m'-disulfonic acid of D.R.P. No. 140613 are coupled in a weakly alkaline solution with 21s parts of m-phenylenediamine to form the dye; it gives a yellow-brown directly on cotton, and a very nice one when treated with diazotized p-Kitranlin. full red-brown of good wash, etchability and great lightfastness.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung eines primären Diazofarbstoffes, dadurch gekennzeichnet, EMI1.2 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of a primary disazo dye, characterized in that EMI1.2 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT56178D 1910-08-10 1911-07-29 Process for the production of azo dyes. AT56178B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE56178X 1910-08-10

Publications (1)

Publication Number Publication Date
AT56178B true AT56178B (en) 1912-11-11

Family

ID=5628675

Family Applications (1)

Application Number Title Priority Date Filing Date
AT56178D AT56178B (en) 1910-08-10 1911-07-29 Process for the production of azo dyes.

Country Status (1)

Country Link
AT (1) AT56178B (en)

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