Isophthalic acid is an important aromatic dicarboxylic acid raw material manufactured through liquid-phase catalytic oxidation of m-xylene under industrial production conditions, widely used in high-end polymer synthesis across multiple industrial sectors.

It serves as a vital copolymer monomer for modified PET resin. Adding proper proportion of this material into PET raw materials can greatly improve the finished polyester’s impact resistance, transparency and anti-aging performance, supporting production of plastic beverage bottles, polyester films and low-melting-point chemical fiber products.

In resin manufacturing field, it is the core feedstock for unsaturated polyester and alkyd resin. Resins modified with isophthalic acid gain outstanding weather resistance, corrosion resistance and mechanical strength, which are suitable for anti-corrosion industrial coatings, outdoor architectural paints, glass fiber reinforced plastic and adhesive raw materials.