Methyltetrahydrophthalic Anhydride MTHPA Epoxy Hardener

Product Name: Methyltetrahydrophthalic Anhydride

CAS No.: 11070-44-3

Synonyms: MTHPA, Tetrahydromethylphthalic Anhydride, 1,3-isobenzofurandione, tetrahydromethyl; 

1,2,3,6-Tetrahydromethylphthalic anhydride

Molecular Formula: C₉H₁₀O₃

Molecular Weight: 166.18

Chemical Structure:  

Specification:

Appearance: Light yellow liquid, Clear

Color, Pt-Co: 200 max.

Viscosity, mPa.s at 25 DEG C: 45 max.

Density, g/cm3 at 20 DEG C: 1.20

Acid anhydride, %: 40.5 min.

Acid value, mg KOH/g: 660-685

Freezing point, DEG C: -15 max.

Loss on drying (120 DEG C), %: 1.0 max.

Free acid content, %: 0.5 max.

Application:

MTHPA is mainly used as a curing agent for epoxy resins. It has a low tendency to absorb moisture from the air and zero or minimal formation of carbon dioxide when mixed with tertiary amine accelerators.

MTHPA can be easily blended with various liquid resins providing stable, low viscous mixture and long pot life. It is widely used for Casting or Potting, Impregnation, Pultrusion, Lamination and Filament winding process. In the field of fiber reinforced plastics, it is used for filament winding products, such as FRP pipes for oil, poles and sport appliance, it is also used for laminated sheets, printed circuit boards, switch gears.

MTHPA has excellent insulating properties to electrical parts such as: capacitors, resistors, wiring parts, transformers, ignition coils and motor.

Packing: 220kg/240kg iron drum or 1100kg IBC

Storage: Store in cool, dry and ventilated place, keep away from open flames or other potential ignition source, and should be protected from moisture, because it is easy to be crystallized when contact with the air moisture. In the winter season MTHPA can solidify, it can easily be remelted by simply heating.

Shelf life: 12 months