Polyester resins are valued for their versatility, strength, and chemical resistance, making them indispensable in various industries, from automotive to construction and coatings. However, like many organic materials, polyesters are susceptible to degradation when exposed to ultraviolet (UV) radiation. This degradation can manifest as yellowing, chalking, loss of gloss, and a significant reduction in mechanical properties, thereby compromising the product's performance and aesthetic appeal. To combat this, the inclusion of effective UV absorbers is critical. NINGBO INNO PHARMCHEM CO.,LTD., a premier manufacturer and supplier, offers UV Absorber 326, an ideal solution for protecting polyester resins.

UV Absorber 326, identified by CAS number 3896-11-5, belongs to the hydroxyphenylbenzotriazole class of UV absorbers. Its primary function is to absorb harmful UV radiation, particularly in the 300-400 nm range, and dissipate this energy harmlessly as heat. This process effectively shields the polyester matrix from the photo-oxidative processes that lead to degradation. A key advantage of UV Absorber 326 is its minimal absorption in the visible light spectrum, ensuring that it does not contribute to the coloration of the final product, which is particularly important for clear or lightly colored polyester applications.

When used in polyester resins, UV Absorber 326 offers several distinct benefits. One significant advantage is its compatibility with the metallic salts commonly employed as catalysts or curing agents in polyester systems. Unlike some other UV stabilizers, it does not form undesirable colored complexes with these metal ions. This ensures that the transparency and original color of the polyester remain intact throughout its service life, even after prolonged UV exposure. This property makes it an excellent choice for applications such as clear coatings, laminates, and cast polyester parts.

For manufacturers looking to buy UV Absorber 326, our company provides a reliable source with a commitment to high purity and consistent quality. We understand the critical nature of raw material performance in achieving desired product outcomes. The recommended addition levels for UV Absorber 326 in polyester resins typically range from 0.1% to 0.5% by weight, though specific requirements may vary based on the resin formulation, intended application, and expected environmental exposure. Our technical team can assist in determining the optimal usage level for your specific needs.

Furthermore, UV Absorber 326 is known for its low volatility and good thermal stability. This means it can withstand the temperatures often encountered during polyester processing without significant loss or degradation. This ensures that the full protective benefit of the additive is retained in the final product, offering long-term UV protection. The ability to buy this essential additive from a trusted manufacturer in China ensures a stable and cost-effective supply for your production needs.

NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to supplying high-performance polymer additives that enhance product durability and value. If your application involves polyester resins and requires superior UV protection, consider integrating UV Absorber 326 into your formulations. Contact us today to learn more about its technical specifications, request a product sample, or to obtain a competitive quote. Secure a dependable supply of this vital UV stabilizer and ensure the longevity and pristine appearance of your polyester products.