CH303796A - Impregnating and embedding agents for electrotechnical purposes. - Google Patents
Impregnating and embedding agents for electrotechnical purposes.Info
- Publication number
- CH303796A CH303796A CH303796DA CH303796A CH 303796 A CH303796 A CH 303796A CH 303796D A CH303796D A CH 303796DA CH 303796 A CH303796 A CH 303796A
- Authority
- CH
- Switzerland
- Prior art keywords
- impregnating
- synthetic resin
- hardener
- embedding
- electrotechnical purposes
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/40—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes epoxy resins
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Organic Insulating Materials (AREA)
Description
Tränk- <B>und</B> Einbettungamittel <B>für elektrotechnische Zwecke.</B> Gegenstand der Erfindung ist ein Tränk- und Einbettungsmittel für elektrotechnische Zwecke, also beispielsweise für das Tränken und Einbetten von Wicklungen, Spulen oder dergleichen.
Dieses Mittel ist dadurch gekenn zeichnet, dass es ein ohne Abscheidung von Stoffen erhärtendes Kunstharz und einen wenigstens bei Erwärmung flüssigen haloge- nierten Kohlenwasserstoff enthält. Dem Kunst harz kann ein Härter zugesetzt sein.
Zur Herstellung eines solchen Mittels kann man beispielsweise ein Äthoxylinharz unter Zusatz eines Härters, wie Schwefelsäureester, mit einem chlorierten Kohlenwasserstoff, der bei Zimmertemperatur z. B. dick sirupartig ist, je nach Bedarf in verschiedenem Verhält nis mischen. Ein solches Gemisch ist. bei 100 bis 130 namentlich nach dem Härterzusatz praktiseh dünnflüssig und ist nach dem Härten und Abkühlen genügend fest. Die Festigkeit ist um so höher, je höher der Pro zentsatz des Kunstharzes ist.
Auch der Er- weiehungspunkt steigt mit wachsendem Kunst harzanteil. Das erstarrte Gemisch hat prak tisch keine Neigung zur Versprödung.
Soll beispielsweise die Wicklung eines 3lesswandlers mit einem derartigen Gemisch getränkt und .eingebettet werden, geht man zweckmässig so vor, dass man sie im Vakuum nach vorheriger Trocknung mit der dünn flüssigen Schmelze dieses Gemisches durch tränkt. Der ehlorierte Kohlenwasserstoff dringt dabei auch in die feinsten Poren, die anschliessend das Kunstharz verschliesst. Ausserdem bildet das Gemisch auch noch eine Hülle um die Spule.
Nach dem, Härten kann: dieser Behandlungaprozess wiederholt werden, bis sieh eine genügend dicke Kapsel um die Wicklung gebildet hat.
Hierauf kann g g egebenenfalls die Wicklung zusammen mit dem Eisenkern und den Zuführungsleitun- gen in Giessharz, das ohne Abscheidung von Stoffen härtet, eingekapselt werden, am besten unter Zusatz von Füllstoffen,
wie Quarzsand. Die dadurch gebildete Kapsel kann auch gleich die Anschlussi olatoren und dergleichen des Wandlers bilden.
Ein besonderer Vorteil des erfindungsge mässen Tränk- und Einbettungsmittels besteht darin, dass die Aushärtungsdauer des Kunst- harzes, das für sich allein nach Härterzusatz in der Regel verhältnismässig rasch aushärten würde, durch die Beimischung des halogenier- ten Kohlenwasserstoffes wesentlich länger ist und beispielsweise dreimal so lang sein kann.
Ein solches Gemisch ist ausserdem nicht ent flammbar und auch sonst thermisch verhält nismässig widerstandsfähig.
Impregnating and embedding agents for electrotechnical purposes. The subject matter of the invention is an impregnating and embedding agent for electrotechnical purposes, for example for impregnating and embedding windings, coils or the like.
This agent is characterized in that it contains a synthetic resin that hardens without the separation of substances and a halogenated hydrocarbon that is liquid at least when heated. A hardener can be added to the synthetic resin.
To produce such an agent, for example, an ethoxylin resin with the addition of a hardener, such as sulfuric acid ester, with a chlorinated hydrocarbon which, at room temperature, for. B. thick syrupy, mix according to requirements in different proportions. One such mixture is. at 100 to 130, especially after the addition of hardener, it is practically thin and is sufficiently firm after hardening and cooling. The higher the percentage of the synthetic resin, the higher the strength.
The softening point also increases as the proportion of synthetic resin increases. The solidified mixture has practically no tendency to become brittle.
If, for example, the winding of a 3less transducer is to be soaked and embedded with such a mixture, it is advisable to proceed in such a way that it is soaked in the thin liquid melt of this mixture in a vacuum after prior drying. The chlorinated hydrocarbon penetrates into the finest pores, which are then closed by the synthetic resin. The mixture also forms a shell around the coil.
After hardening: This treatment process can be repeated until a sufficiently thick capsule has formed around the winding.
If necessary, the winding can be encapsulated together with the iron core and the supply lines in casting resin, which hardens without depositing substances, ideally with the addition of fillers,
like quartz sand. The capsule thus formed can also form the connector olators and the like of the converter.
A particular advantage of the impregnating and embedding agent according to the invention is that the curing time of the synthetic resin, which on its own would usually cure relatively quickly after the addition of hardener, is significantly longer due to the addition of the halogenated hydrocarbon and, for example, three times as much can be long.
Such a mixture is also non-flammable and otherwise thermally resistant.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE303796X | 1950-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH303796A true CH303796A (en) | 1954-12-15 |
Family
ID=6113881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH303796D CH303796A (en) | 1950-11-30 | 1951-11-27 | Impregnating and embedding agents for electrotechnical purposes. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH303796A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230899A (en) * | 1963-06-06 | 1966-01-25 | Pneuways Dev Company Private L | Wheeled vehicles and bogies therefor |
-
1951
- 1951-11-27 CH CH303796D patent/CH303796A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3230899A (en) * | 1963-06-06 | 1966-01-25 | Pneuways Dev Company Private L | Wheeled vehicles and bogies therefor |
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