Hexahydrophthalic anhydride(HHPA)(CAS: 85-42-7)

With benzene, toluene, acetone, carbon tetrachloride, chloroform, ethanol and ethyl acetate mixed solvent, slightly soluble in petroleum ether.

Main application

Hexahydrophthalic anhydride is indispensable to polyester coating raw materials, with six hydrogen of benzene anhydride instead of aromatic amino alkyd paint of polybasic acid production, amino polyester paint, polyester paint, polyurethane paint, powder coating, etc., can significantly improve the bright mirror, burnish, lower viscosity and solid content, especially can greatly improve the weatherability of coatings, such as six hydrogen of benzene anhydride as raw materials made of polyester paint, natural exposure, the luster is 78.2%, same conditions made of aromatic polybasic acid polyester lacquer lustre is only 28%. Six hydrogen of benzene anhydride in addition to used in the production of polyester lacquer, also in the production of plasticizer, pesticide, anti-rust agent, herbicide and other raw materials. With the rapid development of information industry, the requirement about the quality of the semiconductor encapsulation and potting compound is increasing day by day, the demand is growing, six hydrogen of benzene anhydride as curing agent for epoxy resin is widely used in the field.

Synthetic process

To four hydrogen of benzene solvents, acid, catalyst in high-pressure magnetic reaction kettle, vacuum, after nitrogen replacement, then through hydrogen displacement, heated to a certain temperature, stirring constantly conditions, began to hydrogen of our factory, after the reaction, solvent removal, crude products six hydrogen of benzene anhydride by vacuum distillation for a quick finished six hydrogen of benzene anhydride.