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0102030405

UV-328 UV Absorber

Chemical name：2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol
Molecular formula：C22H29N3O
Molecular weight：351.5
Structural formula：

CAS NO：21615-48-6
Content：≥99%
Melting point：80-83℃
Dry weight loss：≤0.5%
Ash content：≤0.1%
Appearance：White - light yellow powder
Solubility：Dissolved in benzene, toluene, styrene, cyclohexane, methyl methacrylate, ethyl acetate, ketone and other organic solvents.
Transmittance：460nm≥97%; 500nm≥98%
Features and Uses：Uv-328 is an efficient UV absorber with a maximum UV absorption peak of 345nm. Its photostability is similar to that of UV-326 and UV-327. However, it has a good miscibility with resins, low thermal volatilization, and high scrubber resistance. The general dosage is about 1%. It also has excellent light stabilization effect in various coatings.
Packing：20 or 25 kg cardboard drum or carton packing.

product details

Product Related Information

Important points about UV absorbers

7 Jan 2019

UV absorbers are compounds added to materials to protect them from the harmful effects of ultraviolet (UV) radiation. Ultraviolet radiation from the sun can cause serious damage to a variety of materials, including plastics, paints, textiles, and even human skin. The primary function of UV absorbers is to absorb UV rays and dissipate them as low levels of heat, thereby preventing degradation or other harmful effects of UV radiation.

Types of UV absorbers

7 Jan 2019

Organic UV Absorbers: These are usually aromatic compounds that absorb UV radiation and convert it into heat energy. Examples include benzotriazole, benzophenone and triazine.

Inorganic UV Absorbers: These include materials such as titanium dioxide (TiO2) and zinc oxide (ZnO), which scatter and absorb UV radiation. They are often used in sunscreens and paints.

Application

7 Jan 2019

Plastics and Polymers: UV absorbers are added to plastics to prevent discoloration, loss of mechanical properties and embrittlement due to UV exposure.

Coatings and Lacquers: They help prevent fading and chalking, thereby maintaining the appearance and integrity of painted surfaces.

Textiles: UV absorbers are used in fabrics to protect the fabric from UV-induced degradation and to provide UV protection to the wearer.

Cosmetics and Sunscreen: In personal care products, UV absorbers protect the skin from harmful UV rays, reducing the risk of sunburn and skin cancer.

Mechanism of action

UV absorbers work by absorbing high-energy UV radiation and releasing it as low-energy heat. This process prevents UV radiation from breaking the chemical bonds in the material, thus protecting it from damage.

Benefits:

Enhanced Durability: The material lasts longer and retains its properties when protected from UV radiation.

Aesthetic Preservation: Colors and finishes remain vibrant and intact.

HEALTH PROTECTION: In sunscreen, UV absorbers protect skin from harmful effects such as sunburn and long-term damage.

Notes

Compatibility: UV absorbers must be compatible with the materials they protect.

Concentration: The effectiveness of UV absorbers depends on their concentration and distribution within the material.

Stability: UV absorbers should be stable and not degrade over time or when exposed to UV radiation.

In summary, UV absorbers play a vital role in extending the service life and maintaining the quality of various materials by protecting them from damage by UV radiation. They are used in a wide range of industries from plastics and textiles to cosmetics and coatings.

Aesthetic Preservation: Colors and finishes remain vibrant and intact.

The information of our products is for reference only. We are not responsible for any unexpected results, or patent dispute caused by it.