Water-based Epoxy Insulating Resin
High-performance water-based resin designed for insulating windings of motors, generators, and transformers.
What is waterborne epoxy insulation resin?
This single-component waterborne epoxy insulation resin series is formulated from epoxy resins, specialized curing agents, and water. It is designed for insulating windings in motors, generators, and transformers. The series supports multiple application processes including standard immersion, continuous impregnation, and vacuum impregnation. It delivers excellent electrical insulation, strong adhesion, heat resistance, and moisture resistance. With very low VOC content, no co-solvents, low odor, and easy cleanup with water, it offers superior environmental performance.
Excellent electrical insulation
Provides excellent electrical insulation to effectively protect winding coils, preventing short circuits and leakage currents.
Eco-friendly Low VOC
Ultra-low VOC, no co-solvent, low odor, spill cleanup with water, eco-friendly and safe
Heat and moisture resistant
Excellent heat and moisture resistance for reliable long-term operation in diverse environments
Shared Product Features
Common Features and Applications of the FS750(n) Series
Product Type
Single-component waterborne epoxy insulation resin
Main Components
Epoxy resin, specialty curing agents, water, and others
Application Areas
Insulation treatment for windings in motors, electric machines, and transformers
Applicable Processes
- • Standard Immersion
- • Continuous impregnation
- • Vacuum Impregnation
Eco-Friendly Features
- • Ultra-low VOC content
- • Solvent-free
- • Low odor
- • Spills can be cleaned with water
Performance
- • Electrical Insulation
- • Bonding Performance
- • Heat resistance
- • Moisture Resistance
Product Line Comparison Chart
Complete product line technical specification comparison for quick selection
| Comparison Item | FS7100 Series | FS7231 Series | FS7236 Series |
|---|---|---|---|
| Product Type | Single-component waterborne epoxy insulating resin | Single-component waterborne epoxy insulating resin | Single-component modified waterborne epoxy insulation resin |
| Key Advantages | High dielectric strength, strong adhesion, low VOC | Fast-curing, high-adhesion potting for small volumes; ideal for high-frequency transformers. | Cures at lower temperatures, resists flash rusting, and offers excellent toughness and water resistance. |
| Appearance | White lotion | White lotion | White to pale yellow emulsion |
| Viscosity (coating-4 cup, 23±2°C) | 15±5 s | 13±3 s | 15±5 s |
| Recommended | 120～130°C, 120～180 min | Dipping type: 120–130°C, 20–30 min; Immersion type: 110–130°C, 120–180 min | 80～120°C, 90～180 min |
| Normal Volume Resistivity | ≥1.0×10¹¹ Ω·m | ≥1.0×10¹¹ Ω·m | ≥1.0×10¹¹ Ω·m |
| Volume resistivity after water immersion | ≥1.0×10¹⁰ Ω·m | ≥1.0×10⁸ Ω·m | ≥1.0×10⁸ Ω·m |
| Dielectric Strength | ≥100 MV/m | ≥70 MV/m | ≥70 MV/m |
| bond strength | ≥100–120 N | ≥50 N | ≥50 N |
| Key Processes | Standard Immersion, Continuous Immersion | Dip coating or vacuum impregnation | Standard immersion, continuous immersion, vacuum impregnation |
| Typical Applications | Motors, motors, and transformer windings | High-frequency transformers, network transformers, fan motors | Compressor motors, industrial motors, appliance motors, universal motors |
| Shelf Life | 25℃ sealed for 90 days | 25℃ sealed for 180 days | 25℃ sealed for 180 days |
| Key Selection Criteria | Prioritize electrical performance and coil bonding strength | Prioritize cycle time for high-frequency transformer dipping or impregnation. | Prioritize low-temperature baking, anti-flash rust protection, flexibility, and water resistance. |
Application Areas
Waterborne epoxy insulating resin is widely used in motors, transformers, and power equipment manufacturing.
Industrial Motors
Impregnation and insulation treatment for windings of various industrial motors to enhance electrical performance and service life.
Distribution Transformer
Vacuum impregnation of transformer windings to enhance moisture resistance and dielectric strength.
New Energy Vehicle Motor
Impregnate and insulate the stator windings of the drive motor to meet high power density and reliability requirements.
Home Appliance Motors
Insulation treatment for motor windings in home appliances such as air conditioner compressors and washing machine motors
Frequently Asked Questions
Frequently Asked Questions on Common Technical Issues with Waterborne Epoxy Insulating Resins
Q: What are the advantages of FS750(n) compared to conventional solvent-based insulating varnishes?
A: FS750(n) is a water-based system with extremely low VOC, no co-solvents, and low odor for enhanced environmental safety. Spills can be cleaned with water, simplifying on-site management. It also delivers excellent electrical insulation, strong adhesion, heat resistance, and moisture resistance, offering overall performance comparable to solvent-based products.
Q: What are the solidification conditions?
A: Taking FS750(n) as an example, the curing condition is 125±2°C for 3 hours. The exact curing temperature and duration must be optimized based on winding structure, impregnation amount, and equipment capabilities. We recommend conducting small-batch process trials first to determine the optimal parameters.
Q: What are the shelf life and storage conditions for the product?
A: FS750(n) has a shelf life of 90 days at 25°C and must be stored in a sealed container below 25°C. During storage, protect from direct sunlight and high temperatures to prevent moisture evaporation and viscosity changes.
Q: Are the FS7100, FS7231, and FS7236 series all single-component products?
A: Yes. FS7100, FS7231, and FS7236 are single-component waterborne epoxy insulation products designed for direct use in dip or immersion processes without the need to mix additional components on-site.
Q: Which series has superior electrical insulation performance?
A: The FS7100 series stands out. With a dielectric strength ≥100 MV/m and volume resistivity after immersion ≥1.0×10¹⁰ Ω·m, it exceeds the published specifications of the other two series, making it ideal for applications requiring high electrical performance.
Q: Which series has the fastest curing speed?
A: Under light dip conditions, the FS7231 series cures fastest; we recommend baking at 120–130°C for 20–30 minutes. However, dip-coated FS7231 typically requires 120–180 minutes of baking. Actual cure time depends on part size and coating volume.
Q: Which series cures at lower temperatures?
A: FS7236 series, with a reference curing condition of 80–120°C for 90–180 minutes. Ideal for motor windings where baking temperature is limited, such as in certain home appliance motors or small motors.
Q: Which series should I choose for a high-frequency transformer?
A: Prioritize the FS7231 series. Designed for high-frequency transformers, this series features rapid curing to meet production cycle requirements for network transformers, high-frequency inductors, and similar products.
Q: Which series is suitable for motors and general transformers?
Choose FS7100 for high dielectric and bond strength. Select FS7236 for compressors, industrial, and appliance motors when low-temperature curing, flash rust inhibition, and water resistance are priorities. Final selection depends on your specific process conditions and performance requirements.
Q: Can all three series use the same construction method?
A: Not exactly. FS7100 and FS7236 primarily use standard immersion, continuous immersion, or vacuum impregnation. FS7231 also offers a limited selection of drip coating and vacuum impregnation options. Choose the process that best fits your equipment and product type.
Q: Can the product be mass-produced directly according to the specifications in the instruction manual?
A: Not recommended. Curing performance depends on part size, winding structure, varnish quantity, oven ventilation, and actual part temperature. Conduct small-scale trials and process validation before batch production to determine optimal parameters for mass manufacturing.
Q: What should be considered when storing the three series?
Seal, protect from light, and store below 25°C to prevent freezing, excessive heat, and contamination. Tanks, dipping tanks, and piping should be made of stainless steel; avoid mixing in oils, acids, alkalis, or organic solvents, as these may compromise product performance.
Q: Do you offer sample testing and technical support?
Yes, we offer free sample testing and can recommend the right sub-model along with process parameters based on your specific application needs. Please contact our technical team to request samples and detailed technical documentation.
Technical Downloads
Get detailed product technical documentation and datasheets
Recommended Products
You may also be interested in these other product lines
Amorphous Strip Composite Adhesive
High-performance bonding solution designed for interlayer lamination of amorphous metal strips
FS7360R Water-Based Epoxy Self-Adhesive Silicon Steel Coating
High-performance water-based coating designed for self-adhesive insulation on silicon steel surfaces and core bonding and molding.
PW33 Water-based Phenoxy Resin
High-performance water-based resin replacing traditional fluorocarbon anti-corrosion coatings, offering superior water and steam barrier properties
Need technical selection or sample testing?
Our technical expert team will recommend the most suitable FS750(n) sub-model for your specific application needs and provide technical support.
Get in Touch