Methyltetrahydrophthalic Anhydride – MTHPA

Description

What is Methyltetrahydrophthalic Anhydride (MTHPA)?

Methyltetrahydrophthalic Anhydride (MTHPA) is a specialty derivative of phthalic anhydride, modified with a methyl group and additional hydrogen atoms, classifying it as a tetrahydro compound. It is widely recognized as an efficient curing agent for epoxy resins, offering superior electrical insulation, high tensile strength, chemical resistance, and thermal stability. Compared to traditional amine-based hardeners, MTHPA is less toxic, provides a longer pot life, and generates lower exothermic heat during curing. These properties make it a preferred choice for advanced resin systems in electrical, electronic, and composite material industries.

Technical Specifications of Methyltetrahydrophthalic Anhydride (MTHPA)

• Chemical Formula: C₉H10O₃

• CAS No.: 11070-44-3

• Appearance: Clear to light yellow liquid

• Molecular Weight: 166.17 g/mol

• Density at 25 °C: 1.19 – 1.21 kg/m³

• Purity: Minimum 99%

• Other Names: Methyl-THPA, MTHPA, Methyl tetrahydrophthalic anhydride, Methyltetrahydrophthalicanhydride, Methyl Tetra Hydro Phthalic Anhydride, Hydrophthalic Anhydride, MTHPA Anhydride, Anhydride Hardener.

Properties of Methyltetrahydrophthalic Anhydride – MTHPA

• Appearance: Colorless to pale yellow liquid
• Mechanical Performance: High bonding strength enhances the mechanical properties of materials, including tensile strength, shear strength, and impact resistance. This ensures that the materials can withstand mechanical stresses without failing.
• Excellent Electrical Insulation: MTHPA-cured products possess excellent electrical insulation properties, crucial for electronic and electrical applications.
• Chemical Reactivity: MTHPA’s anhydride group reacts effectively with epoxy groups, forming strong covalent bonds. This chemical interaction results in a highly cross-linked polymer network.
• Efficient Curing: MTHPA promotes efficient curing at lower temperatures compared to other curing agents. This controlled curing process helps in achieving optimal bonding properties without compromising the material’s structural integrity.
• Durability: Strong bonds contribute to the longevity of materials, reducing the frequency of repairs and replacements. This is particularly important in industries where reliability is paramount, such as aerospace, automotive, and construction.
• Low Viscosity: Its low viscosity allows for easy mixing and processing, facilitating smoother manufacturing processes.

Key Applications of Methyltetrahydrophthalic Anhydride (MTHPA)

MTHPA is widely utilized in multiple industries due to its outstanding curing characteristics, electrical insulation, and chemical resistance properties:

• Epoxy Resin Hardener

  • Primary application as a curing agent for epoxy resins, ensuring excellent mechanical strength, thermal stability, and long-term performance.

  • Offers low exothermic heat during curing, extended pot life, and superior storage stability at room temperature.

• Electrical & Electronic Insulation

  • Extensively used in encapsulation, casting, and insulation of components such as transformers, relays, capacitors, high-voltage switches, and integrated circuits.

  • Plays a critical role in motors, dry-type transformers, line-output transformers, and electronic component impregnation and winding.

• Composites & Laminates

  • Plays a key role in the production of GFRP Rebars (Glass Fiber Reinforced Polymer), offering high strength, corrosion resistance, and long-term durability for construction and infrastructure.

  • Improves structural integrity and thermal resistance in composites and laminated boards used across automotive, aerospace, and marine industries.

• Corrosion-Resistant Coatings & Paints

  • Applied in solvent-free paints, protective coatings, and linings, providing excellent resistance against harsh chemicals and corrosive environments.

• Adhesives & Sealants

  • Used in epoxy adhesives and specialty sealants requiring strong bonding, durability, and chemical resistance.

Packing Storage and Handing of Anhydride Hardener

• Available In: 220 kg Barrel Packing
• Keep in cool, dry, ventilate condition and in closed containers.
• Keep away from heat sources and direct sunlight.
• Recommended safe handling procedures are discussed in the information on the MSDS should review and understand before working.
• Ventilation: Ensure adequate ventilation in areas where MTHPA is used to avoid inhalation of vapors.

Other Products Related to MTHPA

• Epoxy Resin
• Isophorone Diamine (IPDA)
• Triethylenetriamine (TETA)
• Diethylenetriamine (DETA)
• Phenalkamines
• Cycloaliphatic Epoxy Hardener TH7301
• Jeffamine D-230
• Tetrahydrophthalic anhydride (THPA)
• Hexahydrophthalic anhydride (HHPA)
• Methylhexahydrophthalic anhydride (MHHPA)
• Many more
• Reactive Diluents
• Benzyl Alcohol
• Salicylic Acid
• Plasticizers (DBP/DOP/DOA)
• Mix Xylene / Ortho Xylene

Why Choose Chemex Chemicals?

At Chemex Chemicals, we are a trusted importer and distributor of Methyltetrahydrophthalic Anhydride (MTHPA) in India. With years of expertise in the specialty chemicals industry, we ensure:

• Reliable sourcing from reputed global manufacturers

• Assured product quality and timely delivery

• Competitive pricing and bulk availability

• Technical support for applications across industries

By choosing Chemex Chemicals, you gain a dependable partner committed to delivering high-quality MTHPA for your epoxy resin and specialty chemical needs.