TT-AMT-120 is a methyl tetrahydrophthalic anhydride (MTHPA) curing agent used to solidify epoxy resin systems in composite manufacturing and electrical insulation applications. Buyers sourcing this curing agent for epoxy resin curing value its consistent reactivity and compatibility with standard bisphenol-A and bisphenol-F epoxy systems, identified by CAS number 11070-44-3 and molecular formula C9H10O3.
Why Formulators Choose TT-AMT-120 as an Epoxy Curing Agent
Anhydride curing agents are widely specified in epoxy systems where long pot life, low viscosity, and good electrical insulation properties are required after cure. This product is an anhydride-type hardener, which is why it is commonly paired with epoxy resin systems used in electrical casting, encapsulation, and structural composite applications where amine-cured systems may not meet dielectric or thermal requirements.
Chemical Identification
| Chemical Name | Methyl Tetrahydrophthalic Anhydride |
| CAS Number | 11070-44-3 |
| Molecular Formula | C9H10O3 |
Having a defined CAS number and formula helps buyers evaluating this hardener confirm they are sourcing the correct anhydride grade, particularly important when qualifying a new supplier against an existing formulation.
Application as an Epoxy Resin Curing Agent
This product is used as a solidifying agent for epoxy resins, typically combined with an accelerator to control gel time and final cure schedule. Formulators working with anhydride hardeners generally run a controlled elevated-temperature cure cycle, since anhydride curing agents cure more slowly at room temperature compared to amine-based hardeners.
- Mix ratio and cure schedule should be confirmed against the epoxy resin manufacturer’s recommendation before production use.
- An accelerator is typically required alongside this anhydride hardener to achieve practical cure times.
- Elevated-temperature post-cure is commonly used to achieve full mechanical and electrical properties.
Because anhydride-cured epoxy systems are sensitive to moisture and mix ratio accuracy, fabricators introducing this hardener into a new formulation should run small-batch trials before scaling to full production volumes.
Sourcing TT-AMT-120 Alongside Epoxy Resin Systems
Since anhydride curing agents are ordered alongside the epoxy resin systems they cure, buyers can consolidate it into the same order as their resin and reinforcement materials to simplify freight and vendor management. As a recommended international brand product available through our supply chain resource support, it can be quoted alongside epoxy resin, gelcoat, and other auxiliary agents for overseas composite and electrical component manufacturers.
For background on test methods commonly referenced for epoxy resin and curing agent qualification, buyers can consult the ASTM D20 committee on plastics.
Storage and Handling Notes
This anhydride hardener should be stored in a cool, dry, sealed container to prevent moisture uptake, which can affect reactivity and cured properties. Buyers ordering this hardener in bulk should confirm their storage conditions can maintain low humidity, since anhydrides are moisture-sensitive and can hydrolyze over time if exposed to ambient air.
Frequently Asked Questions About TT-AMT-120
What is this product used for?
It is used as a solidifying (curing) agent for epoxy resins, commonly in electrical casting, encapsulation, and composite applications.
What is the CAS number and formula?
The CAS number is 11070-44-3 and the molecular formula is C9H10O3.
Does this curing agent require an accelerator?
Yes, an accelerator is typically used alongside this anhydride hardener to achieve practical cure times for production use.
How should it be stored?
It should be stored in a cool, dry, sealed container, since anhydride hardeners are moisture-sensitive and can hydrolyze if exposed to humid air.
Can TT-AMT-120 be sourced with epoxy resin orders?
Yes, it is commonly quoted alongside epoxy resin, gelcoat, and other auxiliary agents for composite and electrical component manufacturers.
Request a Quote for TT-AMT-120
If your formulation needs a reliable anhydride curing agent for epoxy resin systems, contact our team for a quotation on this curing agent alongside your resin, gelcoat, and reinforcement orders. We can help plan volumes and coordinate delivery as part of a broader composite materials sourcing package.
