Methyltetrahydrophthalic Anhydride (MTHPA, CAS 11070-44-3) is a low viscosity anhydride epoxy curing agent, colourless to pale yellow transparent liquid, offered in industrial grade for epoxy casting, potting, filament winding, electrical insulation and composite materials. TNJ Chemical is the key manufacturer and exporter since from 2001 in China. We guarantee high quality, competitive price, stable supply, fast delivery and tech support etc. To find more, please contact sales@tnjchem.com
Product Information
Chemical Name Methyltetrahydrophthalic Anhydride
Abbreviation MTHPA
CAS No. 11070-44-3Molecular Formula C₉H₁₀O₃
Molecular Weight 166.18
EINECS No. 234-290-7
Synonym 4-Methyltetrahydrophthalic anhydride, Methylcyclohexene-1,2-dicarboxylic anhydride
Chemphysical Properties
Appearance: Colourless to light yellow clear liquid
Density: 1.20~1.22 g/cm³ @20℃
Viscosity: 50~80 mPa·s @25℃Refractive Index: 1.495~1.497
Flash Point: ≥145℃
Freezing Point: ≤ -15℃
Solubility: Miscible with epoxy resin, acetone, toluene; reacts with water
Character: Low viscosity, good impregnation, low shrinkage, excellent heat & electric insulation performance
Quality Specification
Appearance |
Light yellow transparent liquid |
|||||
Color (Pt-Co) |
≤200 |
≤200 |
≤300 |
≤200 |
≤80 |
≤200 |
Crystallization point |
≤10℃ |
≤-5℃ |
≤-15℃ |
≤-15℃ |
≤-15℃ |
≤-15℃ |
Acid value, (mgKOH/g) |
660.0~685.0 |
660.0~685.0 |
660.0~685.0 |
660.0~685.0 |
660.0~685.0 |
660.0~685.0 |
Anhydride conten |
≥40.5% |
≥40.5% |
≥40.5% |
≥40.5% |
≥40.5% |
≥40.5% |
Viscosity (Pa.s, 25℃) |
0.03~0.06 |
0.03~0.06 |
≤0.05 |
≤0.05 |
≤0.05 |
0.03~0.08 |
Density (g/cm3, 20℃) |
1.210±0.05 |
1.210±0.05 |
1.210±0.05 |
1.210±0.05 |
1.210±0.05 |
1.210±0.05 |
Free acid |
≤0.50% |
≤0.50% |
≤0.50% |
≤0.50% |
≤0.50% |
≤0.50% |
Use & Application
MTHPA is a widely used liquid anhydride curing agent for epoxy resin. It is mainly used for electrical and electronic components encapsulation, transformers, capacitors, high voltage insulation casting. Also applied in carbon fiber/glass fiber composites, filament winding products, pultrusion profiles, wind power blade accessories, epoxy coatings and adhesives. Cured epoxy system features outstanding thermal resistance, low dielectric loss and mechanical strength.
Packing
220kg per Steel drum ,17.6mt/20’FCL; 1150kg/IBC Drum, 20.7mt/20’FCL; 23mt/ISO Tank
Custom packing can be arranged.
Delivery & Storage
Store in cool, dry and ventilated warehouse. Keep tightly sealed, strictly avoid moisture absorption, water and humid air contact. Separate from alkaline materials, oxidants and amines. Recommended storage temperature below 30℃. Shelf life 12 months under proper storage. Handle carefully during transportation to prevent drum damage and water ingress.
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