Vacuum Impregnation and Vacuum Pressure Impregnation is used for the processing of a range of electrical components, where a full penetration of impregnating resin must be guaranteed.
For Vacuum Impregnation a component is vacuum treated. Resin is then introduced until the component is fully covered by resin.
The vacuum is released and the resin is then removed. The component is drained. Curing is then achieved by heating in an oven.
For Vacuum Pressure Impregnation a component is vacuum treated. Resin is then introduced until the component is fully covered by resin.
The vacuum is released and an overpressure is applied for a period, after which, the component is returned to atmospheric pressure, the component is drained. Curing is then achieved by heating in an oven.
Do you need further information about our impregnating materials? Please get in touch with us. We are looking forward to your email to impregnation.elantas.europe@altana.com.
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Typical ELANTAS VI / VPI resins:
| Product | Viscosity | Temperature Index | Typical Cure Schedule | Description |
| ELAN-protect® EP 420 | 650 – 800 mPa. s25°C | 180 | 6 – 12 h / 165°C | Single component, UL recognised, epoxy based resin, low VOC, low viscosity, for processing of low, medium and high voltage machines. For VPI application. |
| ELAN-protect® EP 411 | 3300 - 5700 mPa.s 25°C | 220 | 12 h / 165°C | Single component, modified epoxy resin, high thermal stability, excellent chemical and moisture resistance, for processing of traction armatures and field coils. For VPI application. |
| Epoxylite® 578 EB # | 3000 – 5000 mPa.s 25°C | 180 | 8 – 12 h / 165°C | Single component, thixotropic epoxy resin, zero VOC, for general purpose applications. For VPI application. |
| Epoxylite® 478 | 1700 – 2600 mPa.s 25°C | 180 | 6 h / 150°C | Single component, UL recognised, modified epoxy resin, resilient, high chemical and moisture resistance. Suitable for transformers. For VI and VPI application. |
| Epoxylite® H 1009 # | 1000 – 3500 mPa.s 25°C | 180 | 6 h / 130°C or 3 h / 165°C | Single component, epoxy resin, mechanically tough and resilient, excellent chemical and moisture resistance. Suitable for low voltage electric motors, coils and transformers. For dip, hot dip, VI and VPI application. |
| Epoxylite® EIP 4526 | 190 – 210 mPa.s 25°C | 180 | 6 h / 165°C | Single component, epoxy resin, low stress, for processing of wound magnetic cores. For dip, hot dip, VI and VPI application. |
| Dobeckan® ST NV 075-4475 | 850 – 1150 mPa.s 23°C | 180 | 2 – 3 h / 130°C | Single component, acrylated unsaturated polyester-imide resin, high thermal stability, for processing of traction armatures and field coils. For VPI application. |
| Dobeckan® FT 2015/…EK | 90 – 120 s ISO Cup 4 mm 23°C | 200 | 1 h / 150°C | Single component, UL recognised, polyester-imide resin, contains vinyl toluene, little secondary drainage, high filling ability, excellent thermomechanical strength. For processing of motors, generators and transformers. For dip, dip-roll, VI and VPI application. |