Isophthalic Acid (PIA), a key organic intermediate with the CAS number 121-91-5, is a critical component in the synthesis of advanced polymers and high-performance composites. Its unique molecular structure imparts superior properties to the resulting materials, making it indispensable for industries requiring enhanced durability, chemical resistance, and thermal stability. As a leading manufacturer and supplier, we provide high-purity PIA to enable innovation across various sectors.

In the realm of polymer science, Isophthalic Acid is primarily used to produce unsaturated polyester resins (UPR) and modified polyethylene terephthalate (PET). The incorporation of PIA into UPR formulations leads to resins with significantly improved mechanical strength, better resistance to water and chemicals, and enhanced thermal performance compared to those based on orthophthalic acid. These properties make PIA-based UPRs ideal for demanding applications such as corrosion-resistant tanks and piping in chemical processing plants, durable boat hulls, and components for the automotive and construction industries.

When used in PET resin modification, Isophthalic Acid disrupts the regular crystalline structure of polyethylene terephthalate. This disruption results in amorphous PET, which exhibits lower melting points and improved clarity, making it suitable for specialized films and packaging. Furthermore, PIA is a precursor for high-performance polymers like polybenzimidazole (PBI), a material known for its exceptional thermal stability and flame resistance, finding use in protective apparel for firefighters and astronauts.

The low toxicity and white crystalline powder form of our high-purity PIA ensures ease of handling and processing for manufacturers. By choosing to buy Isophthalic Acid from a reputable supplier, you ensure access to a raw material that directly contributes to the superior performance characteristics of advanced polymers and composites. Our commitment as a China-based manufacturer means we offer both exceptional quality and competitive pricing, making advanced material development more accessible.

In conclusion, the versatility and performance-enhancing capabilities of Isophthalic Acid make it an invaluable intermediate for creating next-generation polymers and composites. Whether you are formulating for extreme environments or seeking to improve material longevity, our premium PIA offers the quality and reliability your projects demand. Contact us to explore how our Isophthalic Acid can be leveraged in your advanced material applications.