Impregnating Varnishes
1042 Imide-Epoxy Impregnating Varnish
Class F varnish with low-temperature fast cure and high bond strength
1042 is composed of epoxy resin, imide-modified polyester resin and solvents. It cures fast at low temperature with high bond strength, and is especially designed for rotor windings of high-speed rotating motors.
Class F (155°C)Viscosity 35 ±8 sLow-temperature fast cure
- Temperature class
- Class F (155°C)
- Drying time (135°C)
- ≤90 min
- Water immersion strength
- ≥60 MV/m
- Typical use
- High-speed motor rotors
Request a quotation or a sample. Tell us thickness, width, temperature class, quantity and delivery form. We reply within one business day.
Technical data
| Property | Unit | Value |
|---|---|---|
| Appearance | — | Free of mechanical impurities, paint film smooth and glossy |
| Viscosity (No. 4 cup, 23 ±1°C) | s | 35 ±8 |
| Drying time (135 ±2°C) | min | ≤90 |
| Acid value | mgKOH/g | ≤10 |
| Thick-layer curing ability (135 ±2°C, 4 h) | — | Not inferior to S1, U1, 14.2, uniform |
| Power-frequency electric strength, normal | MV/m | ≥70 |
| Power-frequency electric strength, after water immersion | MV/m | ≥60 |
| Volume resistivity, normal | Ω·m | ≥1×10¹² |
| Volume resistivity, after water immersion | Ω·m | ≥1×10¹⁰ |
| Temperature class | — | Class F (155°C) |
Values are typical values or ranges from our product data. Bulk supply is subject to the approved specification, sample and test report. If a parameter you need is not listed here, ask our engineers for the full test report for that grade.
Key features
- Low-temperature fast cure for batch impregnation of high-speed motor rotors.
- Imide-epoxy system balances bond strength and heat resistance.
- Moisture resistance and stable dielectric performance for Class F insulation.
Applications
Impregnation of Class F motor and appliance windings; high-speed rotating motor rotor windings.
Electric Motors & GeneratorsSwitchgear & Electrical Equipment
Why it fits
When the rotor has to leave the oven quickly and still come out solidly bonded and balanced.
Ordering information
To receive a quotation, please confirm:
- Product and grade
- Thickness and width (and roll or sheet size)
- Temperature class
- Quantity and delivery form (roll / sheet / die-cut / machined)
- Destination port and required delivery date
For machined parts, attach a drawing in PDF, DWG or STEP format. Datasheets, COAs and batch test data are available on request.
Related materials
Often specified together
Send your specification
Our export team reviews the application, the process and the existing specification before recommending a construction.