Methyltetrahydrophthalic Anhydride (MTHPA) CAS 26590-20-5 Technical Guide
Contents
- Product Specifications & Comparative Analysis
- Industrial Applications & Functional Advantages
- Operational Protocols & Safety Guidelines
- Industry-Specific Implementation Case Studies
- Verified Client Success Documentation
- Technical Consultation & Commercial Inquiry
Product Specifications & Comparative Analysis
| Parameter | MTHPA | HHPA | PA |
|---|---|---|---|
| CAS Number | 26590-20-5 | 85-42-7 | 85-44-9 |
| Molecular Formula | C9H10O3 | C8H8O3 | C8H4O3 |
| Melting Point (°C) | -15 to -10 | 33-36 | 131-134 |
| Viscosity @25°C (mPa·s) | 35-50 | 45-60 | Solid |
| Reactivity (Epoxy Equivalent) | 165-175 g/eq | 180-190 g/eq | 148-152 g/eq |
Industrial Applications & Functional Advantages
Primary Functional Characteristics:
- Low-temperature curing capability (60-120°C operational range)
- High thermal stability (Tg 120-150°C post-cure)
- 0.1% volatility @100°C (superior to 85% anhydride alternatives)
Industry-Specific Implementations:
- Electronics: Underfill encapsulation for BGA/CSP components
- Aerospace: Carbon fiber composite matrix formulation
- Electrical: Dry-type transformer insulation systems
- Renewables: Wind turbine blade structural adhesives
Operational Protocols & Safety Guidelines
Optimal Curing Formulation:
- Epoxy:MTHPA ratio = 100:85 (weight basis)
- Accelerator recommendation: 0.5-1.0% BDMA or 2-Ethyl-4-methylimidazole
- Gel time @100°C: 90-120 minutes (varies by accelerator concentration)
Safety Compliance Requirements:
- PPE: Chemical-resistant gloves (Butyl rubber/Nitrile)
- Ventilation: LEV system maintaining <50% TLV (1 mg/m³)
- Spill management: Neutralize with sodium carbonate solution
Industry-Specific Implementation Case Studies
Case 1: High-Voltage Insulator Manufacturing
- Client: Global electrical components supplier
- Challenge: Achieving CTI ≥600V in switchgear epoxy
- Solution: MTHPA-based formulation with silica reinforcement
- Outcome: 22% improvement in dielectric strength vs. HHPA systems
Case 2: Marine Composite Production
- Client: Shipbuilding material manufacturer
- Challenge: Saltwater immersion stability (>10,000 hrs)
- Solution: MTHPA/DDS hybrid curing system
- Outcome: 0.3% water absorption @1000hrs salt spray
Verified Client Success Documentation
Client A: Automotive Electronics Tier-1 Supplier
- Application: ECU potting compounds
- Technical Achievement: -40°C to 165°C thermal cycling stability
- Commercial Impact: 18% production cost reduction vs. polyamide systems
Client B: Wind Energy OEM
- Application: Rotor blade adhesive formulation
- Technical Achievement: 82 MPa shear strength @-30°C
- Commercial Impact: 35% faster curing vs. competitive anhydrides
Technical Consultation & Commercial Inquiry
Value-Added Services:
- Free sample provision (500g minimum order)
- Customized curing system development
- Technical white papers: 12 specialized documents available
Contact our application engineers for formulation optimization:
- Email: info@vivalr.com
- Tel: (86) 15866781826



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