UV Absorber UV-3638

Product Overview

UV Absorber UV-3638 represents a pinnacle in polymer stabilization technology, engineered to provide robust protection against photodegradation in high-performance polymers. Based on an advanced benzoxepanone chemical structure, this specialty chemical delivers broad-spectrum UV absorption capabilities while maintaining exceptional clarity. It is specifically formulated to meet the rigorous demands of the optical and engineering plastics industries, where both aesthetic quality and material longevity are paramount for product success.

Unlike conventional stabilizers, UV-3638 exhibits superior compatibility with polyester (PET) and polycarbonate (PC) matrices. Its high molecular weight ensures low volatility during high-temperature processing, preventing fogging or surface blooming that can compromise optical transparency. This makes it an ideal choice for applications requiring precise light transmittance and color neutrality, ensuring end products maintain their visual integrity over extended service life.

Technical Performance and Stability

One of the defining characteristics of UV Absorber UV-3638 is its remarkable thermal stability. The product demonstrates short-term thermal resistance up to 350 degrees Celsius, allowing it to withstand extreme processing conditions without degradation. For long-term service environments, it maintains stability up to 160 degrees Celsius. Thermogravimetric analysis (TGA) indicates a 10 percent weight loss temperature greater than 371 degrees Celsius, confirming its suitability for high-heat manufacturing processes such as extrusion and injection molding.

Furthermore, this absorber prevents color smearing, ensuring that the final product retains its intended visual properties over time. This is critical for consumer electronics, automotive components, and defense industry applications where appearance and performance standards are strictly enforced. The low volatility also contributes to a cleaner manufacturing environment and reduces the risk of equipment contamination.

Key Advantages

• Exceptional broad-spectrum UV absorption efficiency
• High molecular weight reduces volatility and migration
• No color staining or smearing during processing
• Superior compatibility with PET, PC, and nylon resins
• Validated performance in optical and defense applications
• Enhances product lifespan under harsh environmental exposure

Specifications

Industrial Applications

This product is extensively used in the production of thermoplastic polyester and nylon components that require high processing temperatures. It is especially suitable for the optical industry, including PET and PC optical material lenses, light diffusing plates for backlight liquid crystal display devices, and other precision optical elements. The defense industry also utilizes this stabilizer for components exposed to harsh environmental conditions where material failure is not an option.

Formulators seeking a drop-in replacement for existing UV stabilizers will find UV-3638 to be a performance benchmark. Its compatibility allows for seamless integration into existing production lines without requiring significant process adjustments. This efficiency reduces downtime and ensures consistent output quality for global manufacturing partners.

Packaging and Storage

UV Absorber UV-3638 is packaged in 20 kilogram cartons to ensure safe transportation and handling. Although classified as non-dangerous goods, the product exhibits good storage stability when handled correctly. Users should avoid high temperature and humidity during storage and transportation. It is recommended to store the material in a cool, dry, and ventilated place to prevent moisture absorption and heat exposure. Proper storage ensures the maintenance of product quality and performance characteristics over extended periods.

For detailed technical data sheets or certificates of analysis, please contact our sales team. We support global manufacturing partners with consistent quality and reliable supply chains.