CH210486A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH210486A CH210486A CH210486DA CH210486A CH 210486 A CH210486 A CH 210486A CH 210486D A CH210486D A CH 210486DA CH 210486 A CH210486 A CH 210486A
- Authority
- CH
- Switzerland
- Prior art keywords
- mol
- dye
- phenylenediamine
- azo dye
- acid
- Prior art date
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
- C09B35/36—Trisazo dyes of the type
- C09B35/37—D is diarylamine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 203950. Verfahren zur Herstellung eines Azofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Azo- farbstoffes. Das Verfahren ist dadurch ge kennzeichnet, dass man 1 Mol tetrazotierten p Aminobenzoyl-p-phenylendiamins mit einem Gemisch von Salicylsäure und o-Kresotin- säure, entsprechend 1 Mol, und 1 Mol 2,
8- Amino-naphthol-6-suHonsäure kuppelt, den so gebildeten Disazofarbstoff diazotiert und mit 1 Mol 1,3 Phenylendiamin-4-sulfonsäure vereinigt.
Der neue Farbstoff färbt Baumwolle in braunen Tönen. Die Färbung eignet sich zur Nachbehandlung mit diazotiertem p- Nitranilin.
<I>Beispiel:</I> 62,6 Teile des in bekannter Weise durch Tetrazotieren von 1 Mol p-Aminobenzoyl-p- phenylendiamin und Kuppeln mit einem Mol eines Gemisches aus<B>80%</B> Salicylsäure und 20 % o-Kresotinsäure sowie 1 Mol 2,
8-Amino- naphthol-6-sulfonsäure erhältlichen Farb- stoffes werden mit Wasser verrührt und mit 7 Teilen Natriumnitrit plus 30 Teilen Salz säure 19,5'B6 diazotiert. Nach etwa 2 .Stun- den ist die Nitritaufnahme beendigt, und das Diazotierungsgemisch läuft zu einer mit 30 Teilen Soda versetzten Lösung von 19 Teilen 1,
3-Phenylendiamin-4-sulfonsäure. Der Farb stoff ist nach seiner Fertigstellung aus gefallen und kann direkt gepresst werden. Der Farbstoff färbt Baumwolle in braunen Tönen. Diese Färbungen eignen sich beson ders zur Nachbehandlung mit diazotiertem p-Nitranilin, wobei tief gelbstichig braune Farbstoffe erhalten werden, etwa von der Nuance des Farbstoffes des Beispiels 1 Ab satz 1 der deutschen Patentschrift Nr. 235591, die sich jedoch durch bessere Ätzbarkeit und Lichtechtheit auszeichnen.
<B> Additional patent </B> to main patent no. 203950. Process for the production of an azo dye. The present patent relates to a process for the production of an azo dye. The process is characterized in that 1 mol of tetrazotized p aminobenzoyl-p-phenylenediamine is mixed with a mixture of salicylic acid and o-cresotinic acid, corresponding to 1 mol, and 1 mol of 2,
Coupling 8-amino-naphthol-6-sulfonic acid, diazotizing the disazo dye thus formed and combining it with 1 mol of 1,3 phenylenediamine-4-sulfonic acid.
The new dye dyes cotton in brown tones. The coloring is suitable for post-treatment with diazotized p-nitroaniline.
<I> Example: </I> 62.6 parts of in a known manner by tetrazotizing 1 mole of p-aminobenzoyl-p-phenylenediamine and coupling with a mole of a mixture of <B> 80% </B> salicylic acid and 20% o-cresotinic acid and 1 mole 2,
8-amino-naphthol-6-sulfonic acid available dyes are stirred with water and diazotized with 7 parts of sodium nitrite plus 30 parts of hydrochloric acid 19,5'B6. After about 2 hours, the nitrite uptake is complete and the diazotization mixture runs into a solution of 19 parts 1 to which 30 parts of soda are added,
3-phenylenediamine-4-sulfonic acid. The dye fell out after its completion and can be pressed directly. The dye dyes cotton in brown tones. These dyeings are particularly suitable for aftertreatment with diazotized p-nitroaniline, with deep yellowish brown dyes being obtained, for example from the shade of the dye of Example 1 from sentence 1 of German Patent No. 235591, which, however, are characterized by better etchability and lightfastness .
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE210486X | 1937-01-14 | ||
CH203950T | 1937-12-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH210486A true CH210486A (en) | 1940-07-15 |
Family
ID=25723986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH210486D CH210486A (en) | 1937-01-14 | 1937-12-28 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH210486A (en) |
-
1937
- 1937-12-28 CH CH210486D patent/CH210486A/en unknown
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