3-MHHPA+4-MHHPA

MHHPA (Methyl Hexahydrophthalic Anhydride, CAS No. 25550-51-0) is a liquid anhydride curing agent for epoxy resins. Compared with solid anhydrides, it has low viscosity, excellent compatibility, and ease of processing, making it especially suitable for applications requiring high electrical performance and long-term thermal stability.

1. Liquid Form: Easy to handle and mix, no heating required, improving production efficiency.
2. Low Viscosity: Ensures excellent fluidity, wetting, and impregnation performance.
3. Electrical Insulation: Provides outstanding dielectric properties, widely used in high-voltage equipment.
4. Thermal Stability: Maintains stable performance under high temperature and long-term operation.
5. Environmental Safety: Low toxicity, low volatility, and safer in handling compared to conventional curing agents.

Electrical Insulation: Encapsulation and impregnation for transformers, capacitors, and switchgear.

• Electronics & Semiconductors: LED encapsulation, IC protection, and circuit board coating.
• Automotive & EV: Insulation and encapsulation for electric motors, inverters, and control systems.
• Composites: Used in fiber-reinforced epoxy composites where transparency and toughness are required.
• General Epoxy Systems: Casting, lamination, and electronic potting.

1. Quality: High-purity liquid anhydride (≥ 99%), strictly tested for color index, acid value, and moisture content.
2. Packaging: Supplied in IBC tanks (1000–1100kg) or steel drums (220–240kg) with moisture-proof and leak-proof design.
3. Storage Stability: Good stability, recommended storage in sealed containers at cool and dry conditions.
4. Price & Supply: Factory-direct supply with competitive cost advantage and stable long-term availability.

• Leading Manufacturer: Zhejiang Heyi Chemical Co., Ltd. with more than 80,000 tons annual capacity of anhydride curing agents.
• Global Recognition: Products comply with REACH, RoHS, and international safety standards.
• R&D and Technical Support: Custom formulations, technical guidance, and after-sales services available.
• Reliable Supply Chain: Advanced production and logistics system ensures stable, on-time delivery worldwide.

• Technical Support: Assistance in curing system design and application optimization.
• Quality Guarantee: Full documentation (TDS, COA, MSDS) and replacement in case of non-conformity.
• Customer Care: Prompt communication, shipment tracking, and long-term cooperation commitment.

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