First, the performance of MTHPA
Methyl tetrahydrophthalic anhydride, referred to as MTHPA, MeTHPA, has two isomers, namely 4-methyltetrahydrophthalic anhydride
and 3-methyltetrahydrophthalic anhydride, having a melting point of 65 °C and 63 °C. It is rarely used as a curing agent alone. The actual commodity is a liquid mixture that isomerized to various isomers. The molecular weight is 166.17, and light yellow color, transparent oily liquid, relative density of 1.20 - 1.22. Freezing point < -20 °C. The boiling point is 115-155 °C. Viscosity (25 °C) 40 - 80 mPa · s. The refractive index is 1.4960 to 1. 4980. The anhydride group content is ≥ 40%. The neutralization equivalent is 81-85. The flash point is 137 - 150 °C. Soluble in acetone, ethanol, toluene, etc. It has good stability in air and is not easy to precipitate crystals. Low toxicity, LD502102mg/kg.
Second, the use of MTHPA (MeTHPA
MTHPA is used in epoxy resin curing agents, solventless paints, laminates, epoxy adhesives, etc. And it is also used in epoxy resin curing agent and has long-term storage at room temperature, low freezing point, low volatility and low toxicity. Widely used in motors, dry-type transformers, high-voltage switches, transformers, line output transformers, home appliance capacitors, power capacitor resistors, integrated circuit impregnation, casting and winding.
Third, precautions and packaging:
1. Pay attention to airtightness and moisture during storage and transportation. Stable performance, no deterioration at room temperature for one year.
2. 25kg plastic drum or 220kg steel drum or IBC tank.