For manufacturers aiming to achieve superior product longevity and performance, a thorough understanding of the technical specifications of key additives is essential. UV Absorber 531 (CAS No. 1843-05-6), a benzophenone derivative, is a cornerstone additive for protecting polymers and coatings from UV degradation. NINGBO INNO PHARMCHEM CO.,LTD. provides this high-performance UV absorber and offers insights into its technical attributes to aid in optimal formulation design.

At the heart of UV Absorber 531's efficacy lies its chemical structure, which allows it to absorb ultraviolet light in the 240-340 nm range. Its primary form is a light yellow powder. Key physical and chemical properties include a purity of 99.0% minimum, a melting point range of 47.0-49.0 °C, and a molecular weight of 326.43 g/mol. These specifications are critical for ensuring consistent performance and compatibility within various polymer matrices. The low ash content (0.1% max) and minimal loss on drying (0.5% max) also indicate a high-quality, refined product.

Performance data such as transmittance values are crucial indicators of a UV absorber's effectiveness. UV Absorber 531 typically exhibits high transmittance at longer wavelengths (e.g., 90.0% min at 450 nm and 95.0% min at 500 nm), meaning it efficiently absorbs UV light without imparting significant color to the final product. This is vital for applications where color clarity is important, such as clear plastics or coatings.

The recommended usage level for UV Absorber 531 generally ranges from 0.1% to 0.5% based on the polymer's weight, though optimal concentrations should always be determined through trial testing. This range ensures effective UV protection without negatively impacting the polymer's mechanical properties or processing behavior. Its excellent compatibility with polymers like PE, PP, PVC, PS, PC, and various resins, coupled with its low volatility and migration resistance, makes it suitable for diverse processing methods, including extrusion, injection molding, and coating applications.

For manufacturers looking to buy UV Absorber 531, understanding these technical details is paramount. NINGBO INNO PHARMCHEM CO.,LTD. ensures that all product batches meet stringent quality controls, adhering to these specifications. Furthermore, the company emphasizes the synergistic benefits when UV Absorber 531 is used in combination with Hindered Amine Light Stabilizers (HALS). This combination provides a more robust and comprehensive protection system against UV degradation, extending product lifespan and enhancing performance in challenging environments.

In conclusion, UV Absorber 531 is a technically sound and highly effective additive for polymer stabilization. Its precise chemical composition, performance metrics, and excellent processing characteristics make it an indispensable component for manufacturers in the plastics and coatings industries. By leveraging the detailed technical specifications and expert guidance from suppliers like NINGBO INNO PHARMCHEM CO.,LTD., companies can confidently incorporate UV Absorber 531 to achieve superior product durability and market competitiveness.