CH116336A - Process for preparing non-caking vat dye pastes. - Google Patents
Process for preparing non-caking vat dye pastes.Info
- Publication number
- CH116336A CH116336A CH116336DA CH116336A CH 116336 A CH116336 A CH 116336A CH 116336D A CH116336D A CH 116336DA CH 116336 A CH116336 A CH 116336A
- Authority
- CH
- Switzerland
- Prior art keywords
- caking
- pastes
- vat dye
- preparing non
- dye pastes
- Prior art date
Links
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Description
Verfahren zur Darstellung nicht zusammenbackender ICüpenfarbstoffpasten. Viele wasserunlösliche Küpenfarbstoffe zeigen die unangenehme Eigenschaft, dass sie nach kürzerem oder längerem Stehen aus ihren Pasten sich absetzen und dann oft zu zähen Massen zusammenbacken, die sich nur schwer wieder zu homogenen Pasten anrüh ren lassen.
Es hat sich nun gezeigt, dass dieses Zu sammenbacken verhindert und in vielen Fäl len auch das Absetzen vermieden werden kann, wenn man den .Farbpasten geringe Mengen von Permanganaten zusetzt.
<I>Beispiel 1:</I> 500 Teile Indanthrenorange RRT Teig (10%) werden unter gutem Rühren mit einer konzentrierten wässerigen Lösung von 0,25 Teilen Kaliumpermanganat versetzt. Die homogene Suspension bleibt sehr lange er halten, und es tritt nur ein mässiges Ab setzen des Farbstoffes und kein Zusammen backen ein.
Beispiel <I>2:</I> 500 Teile Indanthrenblau RS Teig (10%) werden unter gutem Rühren mit einer konzentrierten wässerigen Lösung von 0,5 Teilen Kaliumpermanganat versetzt. Auch nach längerem Stehen lässt sich die Paste wieder leicht anrühren, während die nicht mit Permanganat versetzte Paste eine zähe Masse abgeschieden hat. <I>Beispiel 3:</I> 500 Teile Indigo RB 40%ig werden un ter gutem Rühren mit einer konzentrierten wässerigen Lösung von 1 Teil Kaliumper manganat versetzt. Die Wirkung ist die gleiche wie die in den vorhergehenden Bei spielen beschriebene.
Bei andern Farbstoffpasten und Perman- ganaten ist das zweckmässigste Mengenver hältnis jeweils von Fall zu Fall verschieden und leicht zu ermitteln.
Process for preparing non-caking vat dye pastes. Many water-insoluble vat dyes have the unpleasant property that they settle out of their pastes after standing for a short or long period and then often bake together to form viscous masses that are difficult to mix back into homogeneous pastes.
It has now been shown that this caking can be prevented and, in many cases, settling can also be avoided if small amounts of permanganates are added to the color pastes.
<I> Example 1 </I> 500 parts of indanthrene orange RRT dough (10%) are mixed with a concentrated aqueous solution of 0.25 part of potassium permanganate with thorough stirring. The homogeneous suspension remains for a very long time, and there is only a moderate amount of dye and no baking together.
Example <I> 2: </I> 500 parts of indanthrene blue RS dough (10%) are mixed with a concentrated aqueous solution of 0.5 part of potassium permanganate while stirring well. Even after standing for a long time, the paste can be easily stirred again, while the paste not mixed with permanganate has deposited a viscous mass. <I> Example 3: </I> 500 parts of Indigo RB 40% strength are mixed with a concentrated aqueous solution of 1 part of potassium per manganate with thorough stirring. The effect is the same as that described in the previous examples.
In the case of other dye pastes and permanents, the most appropriate proportions differ from case to case and can be easily determined.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE116336X | 1924-09-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH116336A true CH116336A (en) | 1926-09-01 |
Family
ID=5654657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH116336D CH116336A (en) | 1924-09-17 | 1925-05-25 | Process for preparing non-caking vat dye pastes. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH116336A (en) |
-
1925
- 1925-05-25 CH CH116336D patent/CH116336A/en unknown
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