2-(2-Hydroxy-3,5-di-tert-butylphenyl)-benzotriazole: A Highly Effective UV Absorber

UV radiation is a major cause of damage to materials such as plastics, coatings, and textiles, leading to degradation, discoloration, and loss of mechanical properties. To prevent this, UV absorbers are added to these materials to absorb or scatter UV radiation and protect them from degradation. Among the various UV absorbers available, 2-(2-Hydroxy-3,5-di-tert-butylphenyl)-benzotriazole, also known as Tinuvin 320, is a highly effective and widely used UV absorber.

Manufactured and supplied by INNO SPECIALTY CHEMICALS in China, Tinuvin 320 is a type of hydroxyphenylbenzotriazole UV absorber. It has a molecular weight of 323.4 g/mol and a melting point of 137-140°C. Tinuvin 320 is a white to pale yellow crystalline powder that is insoluble in water but soluble in organic solvents such as acetone, methanol, and ethanol.

Tinuvin 320 is a versatile product that can be used in a wide range of applications, including coatings, plastics, adhesives, and fibers. It is particularly effective in polyolefins, polyurethanes, and PVC, providing long-term protection against UV radiation. Tinuvin 320 has a high extinction coefficient and absorbs strongly in the 290-400 nm range, which is the most harmful part of the UV spectrum. It also has a low volatility and thermal stability, making it suitable for use in high-temperature processes.

In coatings, Tinuvin 320 is used to prevent yellowing and chalking caused by UV radiation. It can be used in both solvent-based and water-based coatings, and is compatible with a wide range of resins including acrylics, alkyds, and epoxies. Tinuvin 320 is also effective in transparent coatings, where it does not interfere with the color or clarity of the coating.

In plastics, Tinuvin 320 is used to prevent degradation and discoloration caused by UV radiation. It is particularly effective in polyolefins such as polyethylene and polypropylene, which are widely used in outdoor applications. Tinuvin 320 is also effective in PVC, providing long-term protection against UV radiation and preventing yellowing and brittleness.

In adhesives, Tinuvin 320 is used to prevent degradation and discoloration caused by UV radiation. It is particularly effective in acrylic adhesives, which are widely used in outdoor applications. Tinuvin 320 is also effective in polyurethane adhesives, providing long-term protection against UV radiation and preventing discoloration and loss of mechanical properties.

In fibers, Tinuvin 320 is used to prevent degradation and discoloration caused by UV radiation. It is particularly effective in polyester fibers, which are widely used in outdoor applications such as awnings, tents, and flags. Tinuvin 320 is also effective in nylon fibers, providing long-term protection against UV radiation and preventing discoloration and loss of mechanical properties.

In conclusion, 2-(2-Hydroxy-3,5-di-tert-butylphenyl)-benzotriazole, also known as Tinuvin 320, is a highly effective and widely used UV absorber. Manufactured and supplied by INNO SPECIALTY CHEMICALS in China, Tinuvin 320 is a versatile product that can be used in a wide range of applications, including coatings, plastics, adhesives, and fibers. With its high extinction coefficient, low volatility, and thermal stability, Tinuvin 320 provides long-term protection against UV radiation and helps to prevent degradation, discoloration, and loss of mechanical properties.

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