Light Stabilizer UV-328: A Comprehensive Guide to its Properties and Applications

In the world of polymer manufacturing, the quality and durability of the final product depend on various factors, including the stability of its color, texture, and overall appearance. One of the key challenges that manufacturers face is the degradation caused by exposure to sunlight and other environmental factors. Fortunately, the use of light stabilizers has become a common solution to this problem. Among the most popular options in the market today is Light Stabilizer UV-328, also known as BASF Tinuvin 328 or UV Absorber UV-328.

Manufactured and supplied by INNO Specialty Chemicals in China, Light Stabilizer UV-328 is a benzotriazole-based ultraviolet absorber that can protect polymers from the harmful effects of UV radiation. It is a white, crystalline powder that is insoluble in water and soluble in organic solvents such as benzene, toluene, and ethanol. Its chemical formula is C28H35N3O, and its molecular weight is 425.6 g/mol.

One of the main advantages of Light Stabilizer UV-328 is its high efficiency in absorbing UV radiation in the 290-400 nm range, which is the most damaging to polymers. It works by converting the absorbed UV energy into harmless heat, thus preventing the formation of free radicals that can lead to degradation. In addition, it has a low volatility and a good compatibility with various polymers, including polyolefins, styrenics, polyesters, and engineering plastics.

Another notable property of Light Stabilizer UV-328 is its thermal stability, which allows it to withstand high processing temperatures during the manufacturing of polymers. It has a melting point of 80-83°C and a decomposition temperature of over 300°C. This makes it suitable for use in various industrial applications, such as film extrusion, injection molding, blow molding, and fiber spinning.

The recommended dosage of Light Stabilizer UV-328 varies depending on the type of polymer and the desired level of protection. Generally, it is used at a concentration of 0.2-0.5% by weight, although higher doses may be required for more demanding applications. It is important to note that Light Stabilizer UV-328 should be added to the polymer during the processing stage, as it cannot be applied topically after the product has been formed.

Light Stabilizer UV-328 has a wide range of applications in different industries, including packaging, automotive, construction, and electronics. In the packaging industry, it is commonly used to protect food and beverage containers from UV radiation, thus extending their shelf life and preserving their quality. In the automotive industry, it is used in the production of exterior parts such as bumpers, trims, and mirrors, as well as interior parts such as dashboards and seat covers. In the construction industry, it is used in the production of pipes, profiles, and sheets, as well as in the coatings and sealants used for roofs and walls. In the electronics industry, it is used in the production of electronic housings, connectors, and cables.

In conclusion, Light Stabilizer UV-328 is a highly efficient and versatile ultraviolet absorber that can provide excellent protection to polymers against UV radiation and other environmental factors. Its unique properties make it suitable for use in various industrial applications, and its compatibility with different polymers makes it a popular choice among manufacturers. As the demand for high-quality and durable products continues to grow, the use of light stabilizers such as Light Stabilizer UV-328 is expected to increase in the coming years.

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