Ultraviolet absorber UV-326 is one of the more representative benzotriazole ultraviolet absorbers. Its advantages are stable performance, low toxicity, It has strong ultraviolet absorption ability and can be widely used in photosensitive materials such as color film, color film, color photo paper and high molecular polymers, external protective coatings and many other fields.
Physical and chemical properties:
It is understood that UV absorber UV-326 is in the form of light yellow crystalline powder. Melting point 137~141℃. Soluble in styrene, benzene, toluene and other solvents and monomers, but insoluble in water. It has good compatibility with a variety of resins, is not sensitive to metal ions, does not yellow under alkaline conditions, and has little thermal volatilization loss. It can effectively absorb ultraviolet light with a wavelength of 270-380nm and has good photostability effect – converting ultraviolet rays into heat energy through photochemical action.
Usage:
Ultraviolet absorber UV-326 can be widely used in photosensitive materials and color film, color film, color photo paper and high molecular polymers , external protective coatings and many other areas.
Mainly used in polyolefins (especially food-grade products), polyvinyl chloride, polyamide, ABS resin, AS resin and polyurethane, etc. It is suitable for natural rubber and synthetic rubber. The general dosage is 0.1~0.5%. . It has a wide range of non-food direct contact permissions in polyolefins. It has low volatility at high temperatures and high resistance to thermal degradation. Therefore, it can reduce decomposition losses during polyolefin polymerization and film compression molding. UV protection is used in polyester resin. This product will not form metallic colored salts during the heating process of the resin.
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