CH262169A - Process for the preparation of a brown polyazo dye. - Google Patents
Process for the preparation of a brown polyazo dye.Info
- Publication number
- CH262169A CH262169A CH262169DA CH262169A CH 262169 A CH262169 A CH 262169A CH 262169D A CH262169D A CH 262169DA CH 262169 A CH262169 A CH 262169A
- Authority
- CH
- Switzerland
- Prior art keywords
- mol
- dye
- brown
- preparation
- 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
- C09B35/38—Trisazo dyes ot the type
- C09B35/40—Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 255411. Verfahren zur Herstellung eines braunen Polyazofarbatoffes. Das vorliegende Patent betrifft ein Ver fahren zur Herstellung eines braunen Poly- azofarbstoffes und ist dadurch gekennzeich net, dass man 1 Mol Resorcin, 1 Mol der Ver bindung,
erhältlich durch Verseifen und Di- azotieren des Farbstoffes aus 1 Mol diazotier- ter 4-Aminoazobenzol-4'-sulfosäure und 1 Mol 1-Acetamino-2-oxybenzol, und 1 Mol der aus 1 Mol tetrazotiertem Benzidin und 1 Mol Sali- zy lsäure erhältlichen Zwischenverbindung aufeinander einwirken lässt.
Beispiel: 27,7 g 4 -Aminoazobenzol - 4' - sulfonsäure werden wie üblich diazotiert und mit 15,1 g 1-Acetamino-2-oxybenzol, 13,3 g 30%iger Na tronlauge und Wasser in Gegenwart von Soda gekuppelt. Der Disazofarbstoff wird mit Kochsalz abgeschieden. Er besitzt mutmass lich die Formei
EMI0001.0028
Durch Erhitzen mit verdünnter Natronlauge wird er verseift und durch Neutralisation mit Salzsäure abgeschieden und filtriert. Der Farbstoff wird mit Wasser angerührt und nach Zugabe von 7 g Natriumnitrit unter gutem Rühren mit Salzsäure versetzt.
Wenn die Diazotierung beendet ist, vereinigt man die Diazoverbindung mit einer Lösung von 11. g Resorcin und Wasser in Gegenwart von Soda. Der Trisazofarbstoff wird mit Koch salz abgeschieden. Nach Filtration wird er in Wasser unter Zugabe von Soda gelöst und mit der in üblicher Weise hergestellten Zwi schenverbindung aus 18,4 g Benzidin und 13,8 g Salizylsäure gekuppelt. Der Pentakis- azofarbstoff wird mit Kochsalz abgeschieden und filtriert. Er stellt getrocknet ein dunkles Pulver dar.
Die Färbungen auf Baumwolle zeigen braune Töne und werden, mit Kupfer sulfat nachbehandelt, in den Nassechtheiten sowie in der Licht-, Säure- und Alkaliecht- heit bedeutend verbessert.
<B> Additional patent </B> to main patent No. 255411. Process for the production of a brown polyazo-carbate. The present patent relates to a process for the production of a brown poly azo dye and is characterized in that 1 mole of resorcinol, 1 mole of the compound,
obtainable by saponifying and diazotizing the dye from 1 mol of diazotized 4-aminoazobenzene-4'-sulphonic acid and 1 mol of 1-acetamino-2-oxybenzene, and 1 mol of that from 1 mol of tetrazotized benzidine and 1 mol of hydrochloric acid available interconnection can act on each other.
Example: 27.7 g of 4-aminoazobenzene - 4 '- sulfonic acid are diazotized as usual and coupled with 15.1 g of 1-acetamino-2-oxybenzene, 13.3 g of 30% sodium hydroxide solution and water in the presence of soda. The disazo dye is deposited with common salt. He presumably has the form
EMI0001.0028
It is saponified by heating with dilute sodium hydroxide solution and separated by neutralization with hydrochloric acid and filtered. The dye is mixed with water and, after adding 7 g of sodium nitrite, hydrochloric acid is added with thorough stirring.
When the diazotization is complete, the diazo compound is combined with a solution of 11 g resorcinol and water in the presence of soda. The trisazo dye is deposited with sodium chloride. After filtration, it is dissolved in water with the addition of soda and coupled with the inter mediate compound prepared in a customary manner from 18.4 g of benzidine and 13.8 g of salicylic acid. The pentakis azo dye is deposited with common salt and filtered. When dried it is a dark powder.
The dyeings on cotton show brown shades and, after treatment with copper sulfate, are significantly improved in terms of wet fastness and light, acid and alkali fastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH262169T | 1943-07-02 | ||
CH255411T | 1948-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH262169A true CH262169A (en) | 1949-06-15 |
Family
ID=25729897
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH262169D CH262169A (en) | 1943-07-02 | 1943-07-02 | Process for the preparation of a brown polyazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH262169A (en) |
-
1943
- 1943-07-02 CH CH262169D patent/CH262169A/en unknown
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