CH302794A - Process for the preparation of an optical brightening agent. - Google Patents
Process for the preparation of an optical brightening agent.Info
- Publication number
- CH302794A CH302794A CH302794DA CH302794A CH 302794 A CH302794 A CH 302794A CH 302794D A CH302794D A CH 302794DA CH 302794 A CH302794 A CH 302794A
- Authority
- CH
- Switzerland
- Prior art keywords
- methyl
- ethoxy
- benzoylamino
- brightening agent
- oxy
- Prior art date
Links
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- Polysaccharides And Polysaccharide Derivatives (AREA)
- Paper (AREA)
Description
Verfahren zur Herstellung eines optischen Aufhellungsmittels. Gegenstand vorliegenden Patentes ist ein Verfahren zur Herstellung eines optischen Aufhellungsmittels. Das Verfahren ist da durch gekennzeichnet, dass man 4-(2"'-Oxy- 4"'-methyl-benzoylamino) -4'- (2"-äthoxy-4"-me- thyl- benzoylamino) - stilben -2,2'- disulfonsäure mit einer den f-Oxy-äthylrest einführenden Verbindung, wie z.
B. Äthylenchlorhydrin oder Äthylenoxyd bis zum Verschwinden der pheno- lischen Hydroxylgruppe behandelt.
Das erhaltene neue Aufhellungsmittel, die 4- [ 2"' - (fl- Oxy- äthoxy) - 4"' - methyl - benzoyl- amino ] -4'-(2"-äthoxy-4"-methyl-benzoylamino)- stilben-2,2'-disulfonsäure, stellt ein schwach gelbliches Pulver dar und besitzt gute Affini tät zur Cellulosefaser. <I>Beispiel:
</I> 71 Teile des Dinatriumsalzes der 4-(2"'-Oxy- 4"'-methyl-benzoylamino) -4'- (2"-äthoxy-4"-me- thylbenzoylamino) - stilben - 2,21 - disulfonsäure werden in 1200 Teilen Wasser unter Zusatz von 4 Teilen Natriumhydroxyd gelöst und bei 60-70 mit 8,05 Teilen Äthylenchlorhydrin verrührt,
bis die Lösung nur noch brillant- oder schwach phenolphthaleinalkalisch reagiert. Das Gemisch wird nun mit Natronlauge deutlich mimosaalkalisch gestellt und mit 50 Teilen Kochsalz versetzt. Nach Erkalten kann das entstandene 4-[2"'-(ss-oxy-äthoxy)-4"'-methyl- benzoylamino ] - 4' - (2"- äthoxy - 4"- methyl-ben- zoylamino)-stilben-2,2'-disulfonsaure Natrium durch Absaugen leicht isoliert werden.
Es bil det nach dem Trocknen ein nur schwach gelb liches, wasserlösliches Pulver, dessen wässrige Lösungen vorzüglich geeignet sind, um auf farblosen Cellulosefasern im ultravioletten Licht und im Tageslicht blau fluoreszierende Färbungen zu erzeugen, welche das@behandelte Fasergut brillant weiss erscheinen lassen.
Process for the preparation of an optical brightening agent. The present patent relates to a process for the preparation of an optical brightening agent. The process is characterized in that 4- (2 "'- Oxy- 4"' - methyl-benzoylamino) -4'- (2 "-ethoxy-4" -methyl-benzoylamino) - stilbene -2, 2'-disulfonic acid with a compound introducing the f-oxy-ethyl radical, such as.
B. ethylene chlorohydrin or ethylene oxide treated until the phenolic hydroxyl group disappears.
The new lightening agent obtained, the 4- [2 "'- (fl-oxy-ethoxy) -4"' - methyl-benzoyl-amino] -4 '- (2 "-ethoxy-4" -methyl-benzoylamino) - stilbene -2,2'-disulfonic acid, is a pale yellowish powder and has good affinity for cellulose fiber. <I> example:
</I> 71 parts of the disodium salt of 4- (2 "'- oxy- 4"' - methyl-benzoylamino) -4'- (2 "-ethoxy-4" -methylbenzoylamino) - stilbene - 2.21 - disulfonic acid are dissolved in 1200 parts of water with the addition of 4 parts of sodium hydroxide and stirred at 60-70 with 8.05 parts of ethylene chlorohydrin,
until the solution only reacts brilliantly or slightly phenolphthalein alkaline. The mixture is then made clearly mimosa-alkaline with sodium hydroxide solution and mixed with 50 parts of common salt. After cooling, the resulting 4- [2 "'- (ss-oxy-ethoxy) -4"' - methylbenzoylamino] - 4 '- (2 "- ethoxy - 4" - methyl-benzoylamino) -stilbene- 2,2'-disulfonic acid sodium can easily be isolated by suction.
After drying it forms a slightly yellowish, water-soluble powder, the aqueous solutions of which are eminently suitable for producing blue fluorescent colorations on colorless cellulose fibers in ultraviolet light and in daylight, which make the @ treated fiber material appear brilliant white.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH276692T | 1949-05-27 | ||
CH302794T | 1949-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH302794A true CH302794A (en) | 1954-10-31 |
Family
ID=25731719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH302794D CH302794A (en) | 1949-05-27 | 1949-06-01 | Process for the preparation of an optical brightening agent. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH302794A (en) |
-
1949
- 1949-06-01 CH CH302794D patent/CH302794A/en unknown
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