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What Is Methyl Tetrahydrophthalic Anhydride and the Use of Methyl Tetrahydrophthalic Anhydride


I believe many people are confused about what the methyltetrahydrophthalic anhydride is.

Methylhexahydrophthalic anhydride is a high-performance product among the acid anhydride curing agents. In addition to the general properties of methyltetrahydrophthalic anhydride: high purity, light color, low viscosity, low volatility, low toxicity, low heating loss, performance In addition to stability, long pot life, low freezing point and long-term storage at room temperature, it has better performance than methyl tetrahydrophthalic anhydride: colorless and transparent liquid, does not change color after adding accelerator, and epoxy cured material has white color ; Good heat resistance, especially at 150°C, the epoxy cured product has excellent mechanical and electrical properties. The molecular structure does not contain double bonds, and the cured epoxy resin has good weather resistance and is not affected by light and heat. The molecular structure is relatively non-polar, and the cured product has good moisture resistance; high reactivity, fast curing, and short gel time, which is conducive to the dipping and molding of large motors.

Uses of methyltetrahydrophthalic anhydride

1. Curing agent for epoxy resin: MHHPA is a heat-curable acid anhydride curing agent, mainly used in the electrical and electronic fields. It has a low melting point, low viscosity and a long pot life as a compound composed of cycloaliphatic epoxy resin. The cured product has high heat resistance and good high-temperature electrical performance. It can be used for the immersion of electrical equipment coils and the casting of electrical components and the sealing of semiconductors, such as outdoor insulators, light-emitting diodes (LED), ignition coils, special-purpose capacitors, transformers, motors, sports and entertainment equipment and other fields that require good resistance to outdoor ultraviolet light and humidity.  

2. Epoxy-based composite materials: Methylhexahydrophthalic anhydride has been used more and more widely in high-performance composite materials, and its application in lamination, centrifugal casting, pultrusion, etc. together with fiber reinforced materials, is more and more valued.

3. Adhesive: The refractive index of the cycloaliphatic epoxy adhesive made of MHHPA is similar to that of optical glass. After curing, the internal stress is small, the bonding strength is high, the color does not change, and it is resistant to aging. So it is suitable for large-area optical parts bonding.

Storage, packaging and transportation of methyltetrahydrophthalic anhydride

Packed in 25kg plastic drum or 220kg iron drum, this product must be moisture-proof, fire-proof and waterproof during transportation and stored in a dry and ventilated warehouse.