EPOXYLITE E478
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- One-Component Thixotropic VPI Processing
- Class 180 Insulation-System Use
- Medium-Voltage Motor Impregnation
Product Description
EPOXYLITE E478 Thixo Epoxy VPI Resin is a one-component, heat-cured, 100% solids thixotropic epoxy for vacuum pressure impregnation of medium-voltage motors and generators. The resin has a typical viscosity of 1,500 to 3,000 cP at 25 deg C and 20 rpm, supporting controlled retention during VPI processing. stated cure options are six hours at 149 deg C or four hours at 163 deg C. The cured material has typical Shore D hardness of 85 and is used in recognized insulation systems through Class 180. Applications include uncatalyzed tape systems and random-wound motors below 7 kV.
Key features
- One-component thixotropic processing: The 100% solids resin is supplied ready for heat-cure VPI processing.
- Controlled VPI viscosity: Typical viscosity is 1,500 to 3,000 cP at 25 deg C and 20 rpm.
- Class 180 insulation-system use: The product is documented in recognized insulation systems through Class 180.
Applications
- Vacuum pressure impregnation of medium-voltage motors
- Vacuum pressure impregnation of generators below 7 kV
- Uncatalyzed tape systems
- Random-wound motors
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
Thermal Properties
General Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
Typical as-supplied values for the one-component thixotropic VPI resin.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product form | One-component thixotropic resin | - | As supplied |
| Solids content | 100 | % | As supplied |
| Viscosity | 1,500 to 3,000 | cP | At 25 deg C and 20 rpm |
| Weight per gallon | 9.4 to 9.8 | lb/gal | As supplied |
After-processing / final-state properties
Final-state values retain the stated cure and insulation-system scope.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Cure schedule | 6 h at 149 deg C; 4 h at 163 deg C | - | Heat-cure options |
| Shore D hardness | 85 | - | Typical cured value |
| Insulation-system class | Up to Class 180 | - | UL-recognized systems; exact system scope applies |
