CH285355A - Process for the preparation of a whitening agent. - Google Patents
Process for the preparation of a whitening agent.Info
- Publication number
- CH285355A CH285355A CH285355DA CH285355A CH 285355 A CH285355 A CH 285355A CH 285355D A CH285355D A CH 285355DA CH 285355 A CH285355 A CH 285355A
- Authority
- CH
- Switzerland
- Prior art keywords
- whitening agent
- preparation
- stilbene
- ethoxy
- amino
- Prior art date
Links
Landscapes
- Cosmetics (AREA)
Description
Verfahren zur Herstellung eines Aufhellungsmittels. Clegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines Aufhellungs- mittels. Das Verfahren ist dadurch gekenn zeichnet, dass man 4,4'-Diamino-stilben-2,2'-di- sulfonsäure mit einem. 2-(ss-iVlethoxy-äthoxy)- benzoylhalogenid bis zum Verschwinden der Aminogruppen acyliert.
Das erhaltene neue Aufhellungsmittel, die 4,4'-Di-[ 2"-(ss-methoxy-äthoxy)-benzoylamino]- stilben-2,2'-disulfonsäure, stellt. ein schwach gelblich gefärbtes Pulver dar und besitzt gute Affinität zur Cellulosefaser. Beispiel:
37 Teile 4,4'-1)iainino-still)en-2,2'-disulfon- säure werden in 1000 Teilen Wasser unter Zusatz von 10,6 Teilen eale. Soda gelöst und bei 0 bis 10 mit einer Lösung von 42,9 Tei len 2-(ss-hletlioxy-ätlioxy)-benzoylehlorid in <B>150</B> Teilen Benzol kräftig verrührt und durch Zutropfen einer 1 5 /oigen Sodalösung die frei- werdende Salzsäure neutralisiert.
Sobald kein Sodaverbraucli mehr stattfindet, gibt man so viel Soda zu, bis schwach phenolplithaleinalka- liselie Reaktion herrscht, erwärmt auf 80 bis 90 und lässt das Benzol am absteigenden Küh ler abdestillieren. Die zurückbleibende, wäs serige Lösung enthält das Reaktionsprodukt, als gelbliche, leicht filtrierbare ATasse. Nach dem Trocknen bildet das so erhaltene Dina- triumsalz der 4,4'-Di-[2"-(,B-methoxy-äthoxy)- benzoylamino]-stilben-2,
2'-disulfonsäure ein gelbliches Pulver, dessen wässerige Lösung auf farblosem Cellulosematerial im ultravioletten Licht und im ultraviolette Strahlen enthalten den Tageslicht blau fluoreszierende, farblose Fä.rbung-en erzeugt.
Process for the preparation of a whitening agent. The present patent is a method of making a whitening agent. The process is characterized in that 4,4'-diamino-stilbene-2,2'-disulfonic acid with a. 2- (ss-iVlethoxy-ethoxy) - benzoyl halide acylated until the amino groups disappear.
The new brightening agent obtained, 4,4'-di- [2 "- (ss-methoxy-ethoxy) -benzoylamino] - stilbene-2,2'-disulfonic acid, is a pale yellowish colored powder and has a good affinity for Cellulose fiber. Example:
37 parts of 4,4'-1) iainino-still) en-2,2'-disulphonic acid are eale in 1000 parts of water with the addition of 10.6 parts. Soda dissolved and vigorously stirred at 0 to 10 with a solution of 42.9 parts 2- (ss-hletlioxy-ätlioxy) -benzoylehlorid in <B> 150 </B> parts of benzene and the dropwise addition of a 1 5% sodium carbonate solution Hydrochloric acid released is neutralized.
As soon as there is no more soda consumption, enough soda is added until the reaction is weakly phenolplithalein alkaline, heated to 80 to 90 and the benzene is allowed to distill off on the descending cooler. The remaining aqueous solution contains the reaction product as a yellowish, easily filterable cup. After drying, the dinatrium salt obtained in this way forms the 4,4'-di- [2 "- (, B-methoxy-ethoxy) -benzoylamino] -stilbene-2,
2'-disulfonic acid is a yellowish powder, the aqueous solution of which on colorless cellulose material in the ultraviolet light and in the ultraviolet rays contains daylight produces blue fluorescent, colorless tints.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH285355T | 1949-05-27 | ||
| CH282055T | 1949-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH285355A true CH285355A (en) | 1952-08-31 |
Family
ID=25732135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH285355D CH285355A (en) | 1949-05-27 | 1949-05-27 | Process for the preparation of a whitening agent. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH285355A (en) |
-
1949
- 1949-05-27 CH CH285355D patent/CH285355A/en unknown
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