CH202729A - Process for the preparation of a polyazo dye. - Google Patents
Process for the preparation of a polyazo dye.Info
- Publication number
- CH202729A CH202729A CH202729DA CH202729A CH 202729 A CH202729 A CH 202729A CH 202729D A CH202729D A CH 202729DA CH 202729 A CH202729 A CH 202729A
- Authority
- CH
- Switzerland
- Prior art keywords
- molecule
- dye
- acid
- preparation
- aminonaphthol
- 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
- C09B35/50—Tetrazo dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 194457. Verfahren zur Darstellung eines Polyazofarbstoffes. Das vorliegende Patent betrifft ein Ver fahren zur Darstellung eines blauen Tetra- kisazofarbstoffes und ist dadurch gekenn zeichnet, dass man ein-Molekül Tetrazobenzi- din in saurer Lösung mit einem Molekül 1,8-Aminonaphtol-3,6-disulfonsäure kombi niert,
das Zwischenprodukt zuerst mit einem Molekül.Diazobenzol-p-sulfonsäure in alkali scher Lösung kuppelt und hierauf mit dem Monoazofarbstoff aus einem Molekül diazo- tierter 1,8-Aminonaphtol-3,6-disulfonsäure, alkalisch gekuppelt mit einem Molekül N- Aw1y1-1,8-aaninonaplitol-i3,6-disu lfons#äure, in alkalischer Lösung vereinigt: <I>Beispiel:
</I> 18,4 Teile Benzidin werden in der üb lichen Weise tetrazotiert und mit 34,1 Tei len 1;8-Aminonaphtol-3,6-disulfonsäure (Mo nonatriumsalz) mineralsauer gekuppelt.
Ist die Bildung des Zwischenproduktes beendet, so wird"- es mit der Diazoverbindung aus 17,3 Teilen Aminobenzol-p-sulfonsäure soda- alkalisch vereinigt. Nach erfolgter Kupplung zum Disazofarbstoff lässt man eine alkalische Lösung des Monoazofarbstoffes, erhalten durch Kupplung der Diazoverbindung aus 81,9 Teilen 1,8-Aminonaphtol-3,
6-disidfon- säure mit einer alkalischen Lösung von 36,1 Teilen N-Acetyl-1,8-aminonaphtol-3,6- disulfonsäure, zufliessen. Die Kupplung er folgt rasch und der Farbstoff wird durch Aussalzen der angesäuerten Kupplungs flüssigkeit ausgeschieden. Die nach der Fil- tration erhaltene saure Farbstoffpaste wird neutralisiert und zur Trockne
verdampft.
Der neue Farbstoff stellt ein grauschwar zes, etwas broncierendes; in Wasser mit tief- blauer Farbe lösliches Pulver dar und färbt Leder verschiedenster Gerbungsart in schönen blauen Tönen an.
<B> Additional patent </B> to main patent no. 194457. Process for the preparation of a polyazo dye. The present patent relates to a method for the preparation of a blue tetrakisazo dye and is characterized in that one molecule of tetrazobenzidine in acidic solution is combined with one molecule of 1,8-aminonaphthol-3,6-disulfonic acid,
the intermediate is first coupled with a molecule of diazobenzene-p-sulfonic acid in alkaline solution and then coupled with the monoazo dye from a molecule of diazotized 1,8-aminonaphthol-3,6-disulfonic acid, alkaline-coupled with a molecule of N-Aw1y1-1 , 8-aaninonaplitol-i3,6-disulfonic acid, combined in an alkaline solution: <I> Example:
18.4 parts of benzidine are tetrazotized in the usual way and coupled with 34.1 parts of 1; 8-aminonaphthol-3,6-disulfonic acid (monosodium salt) in mineral acid.
When the formation of the intermediate is complete, it is combined with the diazo compound of 17.3 parts of aminobenzene-p-sulfonic acid in an alkaline soda way. After coupling to the disazo dye, an alkaline solution of the monoazo dye, obtained by coupling the diazo compound from 81 , 9 parts 1,8-aminonaphtol-3,
6-disidonic acid with an alkaline solution of 36.1 parts of N-acetyl-1,8-aminonaphthol-3,6-disulfonic acid flow in. The coupling he follows quickly and the dye is excreted by salting out the acidified coupling liquid. The acidic dye paste obtained after filtration is neutralized and allowed to dry
evaporates.
The new dye is gray-black, something bronzing; Powder soluble in water with a deep blue color and dyes leather of various tanning types in beautiful blue tones.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH202729T | 1938-02-10 | ||
US1170174XA | 1955-09-14 | 1955-09-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH202729A true CH202729A (en) | 1939-01-31 |
Family
ID=25723839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH202729D CH202729A (en) | 1938-02-10 | 1938-02-10 | Process for the preparation of a polyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH202729A (en) |
-
1938
- 1938-02-10 CH CH202729D patent/CH202729A/en unknown
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