Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

GY 257 Epoxy Resin

GY257EpoxyResinisahigh-performancebisphenol-A-basedepoxyresinfromtheGYseriesbyGuangdongYuhuaChemical.Itoffersexcellentmechanicalstrength,chemicalresistance,andadhesiontometal,glass,andcomposites.Idealforcompositemanufacturing,aerospacecomponents,andhigh-reliabilityelectricalinsulationwithlowviscosityandgoodcuringflexibility.
  • gy 257 epoxy resin_77092b29
  • gy 257 epoxy resin_77092b29

Features Of GY 257 Epoxy Resin

  1. High reactivity with standard amine and anhydride curing agents for rapid gelation and short cycle times.

  2. Excellent adhesion to metals, composites, and treated plastics without requiring aggressive surface priming.

  3. Low viscosity (12,000–14,000 cP at 25°C) enabling easy processing via casting, impregnation, and filament winding.

  4. Superior electrical insulation properties with high dielectric strength (>18 kV/mm) and low dissipation factor.

  5. Good chemical resistance to alkalis, aliphatic hydrocarbons, and diluted acids after full cure.

Typical Applications Of GY 257 Epoxy Resin

  1. Electrical encapsulation of transformers, reactors, and high-voltage insulators.

  2. Structural bonding in aerospace composite assemblies and wind turbine blade root joints.

  3. Matrix resin for glass-fiber reinforced laminates used in marine and transportation components.

  4. Potting and coating of power electronics modules requiring thermal stability up to 130°C.

  5. Tooling and mold-making resins for low-volume production of precision composite parts.

Specifications Of GY 257 Epoxy Resin

Chemical TypeBisphenol-A based liquid epoxy resin
Product FormClear to pale yellow viscous liquid
AppearanceHomogeneous, transparent, free from gels or particulates
Epoxy Equivalent Weight (EEW)185–192 g/eq
Viscosity (25°C)12,000–14,000 cP
Chloride Content≤ 500 ppm
Softening Point12–16°C
Primary ApplicationsEncapsulation, laminating, structural bonding, potting


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