DE667858C - Process for the preparation of disazo dyes - Google Patents

Process for the preparation of disazo dyes

Info

Publication number
DE667858C
DE667858C DEI52239D DEI0052239D DE667858C DE 667858 C DE667858 C DE 667858C DE I52239 D DEI52239 D DE I52239D DE I0052239 D DEI0052239 D DE I0052239D DE 667858 C DE667858 C DE 667858C
Authority
DE
Germany
Prior art keywords
disazo dyes
preparation
mol
oxynaphthalene
tetrazotized
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
DEI52239D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IG Farbenindustrie AG
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
Priority to DEI52239D priority Critical patent/DE667858C/en
Application granted granted Critical
Publication of DE667858C publication Critical patent/DE667858C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/26—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of a diaryl urea

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

Verfahren zur Herstellung von Disazofarbstoffen Es wurde gefunden, daß man I Mol. tetrazotierten 3, 3'-Diaminodiphenylharnstoff oder dessen Homologe mit 2Mol. I-Amino-5-oxynaphthalin-7-sulfonsäure in alkalischer Lösung zu wertvollen Disazofarbstoffen vereinigen kann. Die so erhältlichen Disazofarbstoffe können auf der Faser diazotiert oder tetrazotiert und mit Azokomponenten, wie 2-Oxynaphthalin oder 4-Methyl- I, 3-diaminobenzol, entwickelt werden. Man erhält auf diese Weise bordeauxrote bis braune Töne von guter Waschechtheit und von ausgezeichneter neutraler und alkalischer Ätzbarkeit.Process for the preparation of disazo dyes It has been found that I mol. Tetrazotized 3,3'-diaminodiphenylurea or its homologues with 2 mol. I-Amino-5-oxynaphthalene-7-sulfonic acid in alkaline solution too valuable Can unite disazo dyes. The disazo dyes obtainable in this way can on the fiber is diazotized or tetrazotized and with azo components such as 2-oxynaphthalene or 4-methyl-1,3-diaminobenzene. One gets in this way Bordeaux red to brown shades of good washfastness and excellent neutral and alkaline etchability.

In bezog auf die letztgenannte Eigenschaft sind sie dem bekannten analog gebauten Disazofarbstoff, der 2 MOl. 2-Amino-5-oxynaphthalin-7-sulfonsäure als Azokomponente enthält, überlegen' 127 B e i :s p i e 1. -a.qa. Teile 3, 3'-Diamin odi- phenylharnstonff werden mit 69 Teilen Natriumnitrit und 3oo Teilen konzentrierter Salzsäure tetrazotiert, wonach man die fertige Tetrazolösung in eine sodaalkalische Lösung von. 239 Teilen I-Amino-5-oxynaphthaln-7-sulfonsäure laufen läßt. Der entstandene Diazofarbstoff wird kalt abfiltriert, abgepreßt und getrocknet. Er liefert in direkter Färbung ein Bordeaux. Durch Diazotieren und Kuppeln mit 2-Oxynaphthalin wird ein Bordeaux oder durch Kuppeln mit 4-Methyl-I, 3-diaminobenzol ein rotstickiges Braun erbalten.In relation to the last-mentioned property, they are similar to the well-known, analogous disazo dye, the 2 MOl. 2-Amino-5-oxynaphthalene-7-sulfonic acid as azo component contains 'superior' 127 Example : spie 1. -a.qa. Parts 3, 3'-diamine odi- phenylharnstonff are tetrazotized with 69 parts of sodium nitrite and 3oo parts of concentrated hydrochloric acid, after which the finished tetrazo solution in a soda-alkaline solution of. 239 parts of I-amino-5-oxynaphthalene-7-sulfonic acid runs. The resulting diazo dye is filtered off cold, pressed off and dried. In direct coloring it provides a Bordeaux. A Bordeaux is obtained by diazotizing and coupling with 2-oxynaphthalene, or a reddish brown by coupling with 4-methyl-1,3-diaminobenzene.

Claims (1)

PATRNTANSPRUCH: Verfahren zur Herstellung von Disazofarbstoffen, dadurch gekennzeichnet, daß man I Mol. tetrazotierten 3, 3'-Diaminodiphenylbarnstoff oder dessen Homologe mit 2 Mol. i-Amino-5-oxyn:aphthalin-7-sulfons,äure in alkalischer Lösung vereinigt.PATENT CLAIM: Process for the production of disazo dyes, thereby characterized in that I mol. Tetrazotized 3, 3'-Diaminodiphenylbarnstoff or its homologues with 2 mol. i-amino-5-oxyn: aphthalene-7-sulfonic acid in alkaline Solution united.
DEI52239D 1935-05-03 1935-05-03 Process for the preparation of disazo dyes Expired DE667858C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI52239D DE667858C (en) 1935-05-03 1935-05-03 Process for the preparation of disazo dyes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI52239D DE667858C (en) 1935-05-03 1935-05-03 Process for the preparation of disazo dyes

Publications (1)

Publication Number Publication Date
DE667858C true DE667858C (en) 1938-11-21

Family

ID=7193296

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI52239D Expired DE667858C (en) 1935-05-03 1935-05-03 Process for the preparation of disazo dyes

Country Status (1)

Country Link
DE (1) DE667858C (en)

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