Hardener iso-MTHPA
Technical specifications 6-10-124-91
The main purpose of the iso-MTHPA (iso-methyltetrahydrophtalyc anhydride) hardener is obtained impregnating and casting compounds for electrical engineering purpose. The compositions based on hardener have a sufficiently high viability, it are cured at 120-160°C and also demonstrate high strength and dielectric parameters.
Iso-MTHPA Hardener product specifications |
|
Dynamic viscosity at 25°C, Pa·s, no more than |
0.12 |
Gel time at 150°C, hrs |
4-8 |
Density at 20°C, kg/m3 |
1.170-1.230 |
Stoichiometric coefficient |
3.92 |
Acid number mgKOH/g of product |
650-690 |
Mass fraction of the free carboxyl groups, %, to acid number, no more than |
5 |
The properties of polymer materials based on the epoxy resin and iso-MTHPA hardener |
|
Gel time at 100°C, min, not less than |
300 |
Breaking tension, kg /cm2 at bending at tensile at squeezing |
130 127 70 |
Impact strength, kJ·cm2 |
22.0 |
Relative elongation at break, % |
7.0 |
Martens yield temperature, °С |
110 |
Specific electrical resistance, Ω·m |
1·1014 |
Dielectric permittivity at 106Hz |
3.5 |
Water sorptionin for 24 hrs at 20 °С, % |
0.022 |