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Common Sense of Tetrahydrophthalic Anhydride

1. Storage method
Keep the container sealed and store in a cool, dry place to prevent moisture.

2. The synthesis method
Add maleic anhydride to the reaction vessel, heat until it is completely melted, add solvent benzene under stirring, stir and mix, continue stirring and heat to 100-110 ° C, and pass C4 fraction or butadiene to diene. Into a reaction. After the reaction is completed, the solvent benzene is distilled off, cooled by a condenser, and recycled for recycling. The reaction solution is filtered and dried to obtain a finished product. Conversion of maleic anhydride to 100%.

3. The main purpose
As an intermediate for organic synthesis raw materials, tetrahydrophthalic anhydride is generally used to produce alkyd resins and unsaturated polyester resins, coatings, as curing agents for epoxy resins, as well as insecticides, vulcanization regulators, plasticizers. And surfactants and other aspects. As a raw material for producing unsaturated polyester resin, tetrahydrophthalic anhydride is mainly to improve the air-drying property of the resin, and in particular, the role in producing high-grade resin putty and air-drying paint is more obvious. It can be used as a modifier for alkyd resins, an epoxy resin curing agent, an unsaturated polyester resin, a pesticide, and a pharmaceutical raw material. It is used as a light alkyd resin, air-drying water-soluble resin, putty resin, PE resin, and coating. , epoxy resin curing agent, polyester resin, Class F insulation material, adhesive, plasticizer, etc. This product is a chemical raw material intermediate, which can be used to produce pesticides such as enemy bacteria, captan, etc., as well as plasticizers and binders.

4. Nature and stability
It is stable under normal temperature and normal pressure to avoid contact of oxides with water to form tetrahydrophthalic acid. This product is low in toxicity. It is corrosive when it comes into contact with water to form acid. Immediately after contact with the skin, wash with soap and water. Operators should wear protective gear.
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