In the realm of polymer science and manufacturing, protecting materials from the ravages of ultraviolet (UV) radiation is a constant challenge. UV light can initiate degradation pathways that compromise a polymer’s integrity, leading to premature failure and unacceptable aesthetic changes. To address this, manufacturers rely on sophisticated chemical additives, among which UV absorbers play a crucial role. This article explores the science behind UV Absorber UV-328 (CAS No. 25973-55-1), a leading benzotriazole-based UV absorber, and highlights its importance in modern polymer applications. NINGBO INNO PHARMCHEM CO.,LTD., as a dedicated manufacturer and supplier, provides this essential chemical to the global market.

Understanding the Molecular Mechanism of UV-328

UV Absorber UV-328 belongs to the benzotriazole class of compounds, known for their exceptional ability to absorb UV light. Its chemical structure, 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol, is specifically engineered to absorb UV radiation primarily in the UVB and UVA range (approximately 270-340 nm). The effectiveness of UV-328 lies in its ability to undergo a rapid, reversible tautomerization process upon absorbing UV photons. This internal conversion process efficiently dissipates the absorbed energy as heat, preventing it from initiating damaging photochemical reactions within the polymer matrix. This cyclic process allows a single molecule of UV-328 to absorb multiple UV photons without significant decomposition, providing sustained protection.

Key Properties and Benefits for Polymer Stabilization

The effectiveness of UV-328 as a polymer stabilizer is attributed to several key properties, which are readily available when you buy UV absorber UV-328 from NINGBO INNO PHARMCHEM CO.,LTD.:

  • High UV Absorption Efficiency: Its strong absorption cross-section in the critical UV wavelengths makes it highly effective at shielding polymers.
  • Excellent Compatibility: UV-328 is formulated to be highly compatible with a broad spectrum of polymers, including polyolefins (like polyethylene and polypropylene), PVC, polyesters, polycarbonates, and styrenic polymers. This ensures it can be easily incorporated into various processing methods without negatively impacting the polymer’s inherent properties.
  • Low Volatility: During high-temperature polymer processing (e.g., extrusion, injection molding), low volatility is crucial to prevent the loss of the additive. UV-328’s low thermal evaporation ensures it remains within the polymer, providing continuous protection.
  • Good Washing Resistance: This property is vital for applications where the polymer might be exposed to washing or cleaning cycles. It ensures that the UV protection is not easily leached out, maintaining the material’s performance over time.

Sourcing High-Quality UV-328 from China

When seeking reliable UV absorbers for polymers, it is essential to partner with a reputable manufacturer and supplier. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-purity UV Absorber UV-328 that meets rigorous industry standards. We understand the importance of consistent quality and competitive pricing for our global clientele. Whether you are developing new polymer formulations or seeking to improve existing ones, our UV-328 offers a scientifically sound and economically viable solution for preventing UV-induced degradation.

For detailed technical specifications, application guidance, and to inquire about bulk purchases, please contact NINGBO INNO PHARMCHEM CO.,LTD. today. Secure your supply of this vital polymer additive and enhance the durability of your products.