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2-(2-Hydroxy-3,5-di-pentylphenyl)benzotriazole: A Reliable UV Absorber for Polymer Applications

As the demand for polymer materials continues to grow, the importance of protecting them from UV-induced degradation becomes increasingly evident. UV radiation can cause irreversible damage to the structure and properties of polymers, leading to color fading, embrittlement, cracking, and reduced performance. To prevent these undesirable effects, the use of UV stabilizers is essential. One of the most effective and widely used UV absorbers is 2-(2-hydroxy-3,5-di-pentylphenyl)benzotriazole, also known as UV-328 or Tinuvin 328.

UV-328 is a high-performance UV absorber that belongs to the class of benzotriazole derivatives. Its chemical structure features a triazole ring and two alkylphenol moieties that provide excellent absorption of UV radiation in the 290-400 nm range, which corresponds to the most damaging wavelengths for polymers. UV-328 is soluble in a wide range of solvents and compatible with various polymers, including polyolefins, PVC, styrenics, polyesters, and polyamides. It is also thermally stable and does not decompose or volatilize at typical processing temperatures.

One of the key benefits of UV-328 is its ability to prevent yellowing and maintain the optical clarity of polymers. When exposed to UV radiation, many polymers tend to yellow due to the formation of chromophoric groups or free radicals. This phenomenon is particularly pronounced in transparent and light-colored materials, such as films, sheets, and bottles. By absorbing the UV radiation before it reaches the polymer matrix, UV-328 can inhibit the yellowing process and maintain the original appearance of the product.

Another advantage of UV-328 is its synergistic effect with other stabilizers, such as hindered amine light stabilizers (HALS) or antioxidant. By combining UV-328 with other additives, it is possible to achieve a more comprehensive protection against various degradation mechanisms, including thermal oxidation, photo-oxidation, and hydrolysis. This approach is particularly useful for demanding applications, such as outdoor products, automotive parts, and electronic devices, where the exposure to UV radiation is high and the performance requirements are stringent.

INNO SPECIALTY CHEMICALS is a leading manufacturer and supplier of UV-328 and other UV stabilizers. With over 20 years of experience in the field, INNO has developed a wide range of products that meet the diverse needs of the polymer industry. Their UV-328 products are available in various grades and forms, such as powder, granule, and liquid, to suit different processing methods and applications. Moreover, INNO's UV stabilizers are compliant with the latest regulations and standards, such as REACH, RoHS, and FDA, ensuring the safety and sustainability of the final products.

In conclusion, 2-(2-hydroxy-3,5-di-pentylphenyl)benzotriazole, or UV-328, is a highly effective and versatile UV absorber that provides reliable protection against UV-induced degradation in polymers. Its excellent optical clarity, thermal stability, and compatibility with other stabilizers make it a preferred choice for many applications. As the polymer industry continues to grow and innovate, the demand for UV-328 and other UV stabilizers is expected to increase, and companies like INNO SPECIALTY CHEMICALS will play a crucial role in meeting this demand.

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