Overview
Benzophenone stabilizer is a specialized chemical additive designed to protect materials, particularly polymers, from ultraviolet (UV) light-induced degradation. It functions by absorbing UV radiation and dissipating it as harmless heat, thereby extending the lifespan of products exposed to sunlight or artificial UV sources. This stabilizer is favored in industries requiring durable materials, such as automotive, construction, and packaging, due to its effectiveness and compatibility with a wide range of polymers. Its role in preventing discoloration, brittleness, and loss of mechanical properties makes it indispensable in UV-sensitive applications.
Physical and Chemical Properties
Benzophenone stabilizer is characterized by its crystalline structure, moderate melting point, and excellent solubility in organic solvents. Its molecular structure includes a ketone group flanked by two phenyl rings, which is responsible for its strong UV absorption in the 250-350 nm range. Key chemical properties include resistance to oxidation and thermal degradation under typical processing conditions. Its low volatility ensures long-term stability in polymer matrices, while its neutral pH makes it compatible with most industrial formulations.
Main Applications
The primary use of benzophenone stabilizer is in plastics and coatings, where it safeguards materials like PVC, polyolefins, and acrylics from UV-induced breakdown. It is also employed in adhesives, sealants, and synthetic fibers to maintain performance under outdoor exposure. In the packaging industry, it is used for food-grade films and containers to prevent UV degradation without affecting transparency. Specialty applications include cosmetics (e.g., sunscreens) and inks, where UV stability is critical for product integrity.
Safety and Storage
While benzophenone stabilizer is generally considered low-toxicity, proper handling measures are recommended. Use gloves and safety goggles to avoid skin/eye contact, and ensure adequate ventilation to prevent dust inhalation. Storage requires protection from moisture and direct sunlight to maintain efficacy. Bulk quantities should be kept in tightly sealed containers at temperatures below 30°C. Shelf life typically exceeds two years when stored correctly.
B2B Procurement Guide
When sourcing benzophenone stabilizer, prioritize suppliers with ISO-certified manufacturing and batch-specific Certificates of Analysis (CoA). Key procurement criteria include UV absorption efficiency (measured by extinction coefficient), residual solvent levels, and compliance with regional regulations like EU REACH or U.S. FDA 21 CFR for food-contact applications. For large-scale orders, negotiate pricing based on annual volume commitments and consider testing samples for compatibility with your specific polymer system. Logistics should account for its classification as non-hazardous freight, though some carriers may require special documentation for international shipping.
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