CH241413A - Process for the production of a compound which can be used as a rust protection agent and additive for paints. - Google Patents
Process for the production of a compound which can be used as a rust protection agent and additive for paints.Info
- Publication number
- CH241413A CH241413A CH241413DA CH241413A CH 241413 A CH241413 A CH 241413A CH 241413D A CH241413D A CH 241413DA CH 241413 A CH241413 A CH 241413A
- Authority
- CH
- Switzerland
- Prior art keywords
- paints
- compound
- additive
- protection agent
- rust protection
- 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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/086—Organic or non-macromolecular compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Description
Verfahren zur Herstellung einer als Rostschutz- und Zusatzmittel für Lacke verwendbaren Verbindung. Es ist bekannt, dass Phosphorsäure bezw. deren Salze rostschützend wirken. Ausserdem werden Ester von Phosphorsäuren mit organi schen hydroxyltragenden Verbindungen in der Technik der Lacke und Pressmassen in grossem Umfange als Weichmacher ver wendet.
Es wurde ein Verfahren zur Herstellung einer Verbindung durch Einwirkung von Phosphorpentoxyd auf einen Akohol gefun den, die in der Technik als Rostschutzmittel sowie als Zusatz zu Lacken insbesondere als Kalthärter, zum Beipiel für Harnstoff- oder Phenolf ormaldehyd-Harzlacke verwendbar ist.
Das den Gegenstand vorliegender Erfin dung bildende Verfahren zur Herstellung einer als Rostschutz- und Zusatzmittel zu Lacken verwendbaren Verbindung ist da durch gekennzeichnet, dass man Phosphor- pentoxyd auf flüssigen Butylalkohol ein wirken lässt. Man verfährt, beispielsweise wie folgt: Die Verbindung wird durch Einwirkung von Phosphorpentoxyd auf flüssigen Butyl- alkohol zweckmässig in der gälte hergestellt.
Bei höherer Temperatur entstehen leicht Ver färbungen, die vermieden werden sollen, da auch bei Hochvakuum das Destillieren schwie rig ist. Nicht umgesetztes Phosphorpentoxyd kann abfiltriert werden, worauf die Verbin dung gegebenenfalls mit Wasser gewaschen werden kann. Überschüssiges Butanol kann durch Abdestillieren entfernt werden.
Bei der Umsetzung entsteht nicht Tri- butylphosphat, wie es bisher durch Einwir kung von Phosphoroxychlorid auf Alkali- butylat gewonnen wurde, sondern eine we sentlich höher siedende, wahrscheinlich -durch gleichzeitige Kondensation und Veresterung entstandene schwachsaure Verbindung von sehr geringer Flüchtigkeit.
Diese Eigenschaft ermöglicht ihre vorteilhafte Verwendung als Weichmacher für Lacke, insbesondere Nitro- lacke, da sie auch mit den meisten Lösungs- mitteln mischbar ist. Bei der Verwendung für kalthärtende Harzlacke ist es besonders günstig, dass ausser der härtenden auch noch eine weichmachende Wirkung in Erschei nung tritt. Gleichzeitig wird auch ein Rost schutz erzielt,. der auch eintritt, wenn die Verbindung allein auf Eisen aufgetragen wird.
Nötigenfalls kann sie ausser mit organi schen Lösungsmitteln auch mit Hilfe wäss riger, alkalisch reagierender Lösungen wie der entfernt werden.
Process for the production of a compound which can be used as a rust protection agent and additive for paints. It is known that phosphoric acid BEZW. whose salts have an anti-rust effect. In addition, esters of phosphoric acids with organic compounds containing hydroxyls are used to a large extent as plasticizers in paint and molding compounds.
A method for producing a compound by the action of phosphorus pentoxide on an alcohol was found, which can be used in technology as a rust inhibitor and as an additive to paints, in particular as a cold hardener, for example for urea or phenol ormaldehyde resin paints.
The subject of the present invention forming process for the production of a compound which can be used as a rust protection agent and additive to paints is characterized in that phosphorus pentoxide is allowed to act on liquid butyl alcohol. The procedure is, for example, as follows: The connection is expediently produced in the cold by the action of phosphorus pentoxide on liquid butyl alcohol.
At higher temperatures, discolorations easily develop, which should be avoided, since distillation is difficult even in a high vacuum. Unreacted phosphorus pentoxide can be filtered off, whereupon the compound can optionally be washed with water. Excess butanol can be removed by distilling off.
The reaction does not produce tributyl phosphate, as has been obtained so far by the action of phosphorus oxychloride on alkali butylate, but a much higher-boiling, probably weakly acidic compound of very low volatility produced by simultaneous condensation and esterification.
This property enables them to be used advantageously as a plasticizer for paints, in particular nitro paints, since they can also be mixed with most solvents. When used for cold-curing resin lacquers, it is particularly favorable that, in addition to the hardening one, there is also a softening effect. At the same time, rust protection is also achieved. which also occurs when the compound is applied to iron alone.
If necessary, in addition to organic solvents, it can also be removed with the aid of aqueous, alkaline solutions.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH241413T | 1945-02-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH241413A true CH241413A (en) | 1946-03-15 |
Family
ID=4462334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH241413D CH241413A (en) | 1945-02-22 | 1945-02-22 | Process for the production of a compound which can be used as a rust protection agent and additive for paints. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH241413A (en) |
-
1945
- 1945-02-22 CH CH241413D patent/CH241413A/en unknown
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