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Chemical Name：2,2'-(1, 4-phenylene) di4h-3, 1-benzoxazine-4-one

Molecular formula：C₂₂H₁₂N₂O₄

Molecular weight：368.34

Structural formula：

CAS NO：18600-59-4

Content：more than 99%

Melting point：310-315℃

Ash content：less than 0.1%

Volatile matter：less than 0.3%

Properties and Uses：UV absorber UV-3638 is a benzoxazinone UV absorber with a absorption range of 200-400 nm, and strong absorption for both UVA and UVB. It has the characteristics of no coloring, no precipitation, low volatilization and high absorption. It maintains a high SPF value for UVB absorption and has strong photothermal stability. The ultraviolet light absorption efficiency is several times that of ordinary ultraviolet absorber. It has the properties of delaying color yellowing and blocking physical loss. It is especially suitable for optical materials with high transmittance and color requirements, and the light diffuser plate of liquid crystal display device. UV absorbent UV-3638 has the characteristics of high temperature resistance, anti-extraction, small thermoweight loss, good stability, especially suitable for high temperature processing and harsh UV absorption efficiency requirements of thermoplastic polyester, polycarbonate, polyphenylene sulfide, polyphenyl ether, polysulfone, polyaryl ester, especially suitable for PET transparent materials and PC transparent materials, Do not participate in PET polyester polymerization process reaction. The general dosage is 0.1-0.5%.

Packing：25KG carton