In the vast landscape of chemical additives, UV absorbers play an indispensable role in protecting materials from the damaging effects of ultraviolet radiation. NINGBO INNO PHARMCHEM CO.,LTD. is pleased to present a comprehensive overview of UV Absorber UV-531, also known by its chemical name Octabenzone (CAS 1843-05-6). This benzophenone-based compound is a cornerstone for enhancing the light stability and longevity of a wide array of products.

UV-531 is characterized by its light yellow crystalline powder appearance. Its chemical formula, C21H26O3, and molecular weight of 326.43, along with a melting point of 47-49°C, contribute to its favorable processing characteristics. One of its most significant properties is its ability to strongly absorb UV light in the wavelength range of 270-340nm. This capability is central to its function in polymer stabilization, preventing photodegradation that can lead to material failure and aesthetic defects.

The applications of UV-531 are remarkably diverse. It is widely incorporated into polymers such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), polycarbonate (PC), and various synthetic fibers and resins. In these materials, it acts as an excellent anti-aging additive, effectively delaying yellowing and preserving physical performance. For example, in agricultural films made from PE or polypropylene fibers, UV-531 ensures sustained performance under prolonged sun exposure. Its efficacy in protecting plastics from UV damage makes it an indispensable component in the manufacturing process.

Beyond plastics, UV-531 also finds extensive use in coatings, including dry phenolic and alkyd varnishes, polyurethanes, acrylics, and epoxy resins. It provides essential light stabilization for automotive refinishing paints, powder coatings, and rubber products. The compatibility of UV-531 with these various matrices, coupled with its low volatility and minimal migration, ensures that its protective qualities are retained throughout the product's lifecycle. This is a crucial aspect when considering enhancing polymer durability with UV-531.

The benefits of using UV-531 are numerous. It offers superior UV protection, enhances color stability, and extends the service life of treated materials. Its non-toxic nature and ease of processing further add to its appeal for manufacturers. Understanding the core of its functionality, the benzophenone UV absorber mechanism, highlights how it efficiently converts harmful UV energy into heat. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality UV absorbers like UV-531, contributing to the development of more resilient and durable products across industries.