E57-81 is a high-performance, heat-resistant modified unsaturated polyester resin, formulated with a modified heat-resistant unsaturated polyester resin as its primary base, supplemented with initiators, polymerization inhibitors, and reactive diluents.
This resin exhibits excellent adhesion, superior insulation properties, high mechanical strength, and good moisture and mildew resistance. It also exhibits good compatibility with magnet wire and exceptional refrigerant resistance, making it a Class H and N solvent-free impregnation resin.
This resin is widely used for vacuum and atmospheric pressure impregnation insulation treatments for Class B, F, H, and N military, nuclear power, lifting, metallurgy, frequency conversion, and refrigerant-resistant motors and electrical appliances. This application covers a wide range of critical applications and complex operating conditions, providing reliable insulation protection and performance enhancement for these equipment.