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

Acid Anhydride Curing Agent MTHPA

MTHPA is a high-purity methyltetrahydrophthalic anhydride curing agent from the Hexion Ancamine® series, widely used in epoxy resin systems for electrical insulation, composites, and encapsulation due to its low viscosity, excellent thermal stability, and superior dielectric properties. It enables fast ambient or elevated-temperature curing with low exotherm and minimal volatility.
  • acid anhydride curing agent mthpa_bc9ac749
  • acid anhydride curing agent mthpa_bc9ac749

Features Of Acid Anhydride Curing Agent MTHPA

  1. High purity methyltetrahydrophthalic anhydride (MTHPA) with low volatile content for consistent epoxy resin curing performance.

  2. Excellent thermal stability and low exotherm during cure, enabling controlled processing in thick-section applications.

  3. Low viscosity at elevated temperatures facilitates easy handling, mixing, and impregnation of fiber reinforcements.

  4. Superior electrical insulation properties after full cure, meeting stringent requirements for high-voltage equipment.

  5. Good compatibility with standard bisphenol-A and novolac epoxy resins without requiring accelerators.

Typical Applications Of Acid Anhydride Curing Agent MTHPA

  1. Electrical insulating varnishes for motors, transformers, and generators.

  2. Encapsulants and potting compounds for power electronics and LED modules.

  3. Winding impregnation resins in high-efficiency electric motors and traction systems.

  4. Structural composites in aerospace and wind turbine blade manufacturing.

  5. High-performance laminates for printed circuit board (PCB) substrates.

Specifications Of Acid Anhydride Curing Agent MTHPA

Chemical TypeMethyltetrahydrophthalic anhydride (MTHPA)
Product FormCrystalline solid
AppearanceWhite to off-white crystalline powder or granules
Primary ApplicationsEpoxy resin curing agent for electrical insulation and composites
Key FeaturesLow volatility, high thermal stability, excellent dielectric strength
Storage ConditionStore in cool, dry, well-ventilated area; protect from moisture
Shelf Life12 months under recommended storage conditions
Handling PrecautionUse appropriate PPE; avoid inhalation and skin contact


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