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

Sanwa TOHMIDE 390 Epoxy Curing Agent

Sanwa TOHMIDE 390 is a high-performance epoxy curing agent from Sanwa Chemical’s TOHMIDE® series, designed for demanding industrial coatings and composites. It offers excellent flexibility, chemical resistance, and low-temperature cure capability. Widely used in automotive, aerospace, and electronic encapsulation applications, it ensures superior adhesion and durability while maintaining low viscosity and extended pot life.
  • sanwa tohmide 390 epoxy curing agent_6bf7c306
  • sanwa tohmide 390 epoxy curing agent_6bf7c306

Features Of Sanwa TOHMIDE 390 Epoxy Curing Agent

  1. High reactivity with standard bisphenol-A and novolac epoxy resins at ambient to moderate elevated temperatures.

  2. Excellent chemical resistance—particularly to alkalis, solvents, and weak acids—after full cure.

  3. Low viscosity enables easy handling, uniform mixing, and improved wetting of fillers and reinforcements.

  4. Low volatility and low odor profile support safer workplace handling and reduced VOC emissions.

  5. Provides high glass transition temperature (Tg) and superior mechanical strength in cured systems.

Typical Applications Of Sanwa TOHMIDE 390 Epoxy Curing Agent

  1. Electrical insulation coatings for transformers, busbars, and switchgear components.

  2. Structural adhesives for aerospace composite bonding and metal-to-composite assemblies.

  3. High-performance potting and encapsulation compounds for power electronics and LED modules.

  4. Heavy-duty protective coatings for marine and offshore infrastructure.

  5. Carbon fiber prepreg systems requiring precise cure control and dimensional stability.

Specifications Of Sanwa TOHMIDE 390 Epoxy Curing Agent

Chemical TypeAromatic amine-based curing agent
Product FormLiquid
AppearancePale yellow to amber clear liquid
Density (25°C)1.08–1.12 g/cm³
Viscosity (25°C)250–450 mPa·s
Amine Value380–420 mg KOH/g
Primary ApplicationsEpoxy resin curing for high-performance composites, coatings, and adhesives
Key FeaturesFast ambient cure, low volatility, high Tg capability, excellent adhesion


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