UV ABSORBER UV 234 CAS NO.70321-86-7

Chemical name:2-[2'-hydroxy-3',5'-bis(-dimethyl benzyl)-phenyl]benzotriazole

CAS No.：70321-86-7

Molecular formular：C₃₀H₂₉N₃O

Molecular weight： 447.6

Appearance: Light yellow powder

Purity, %:≥99

Melting point，℃：139.5-141

Volatile matter, %:≤0.5

Ash, %:≤0.05

Transmittance450nm≥97%

500nm≥98%

UV ABSORBER HOSORB-234isa high molecular weight ultraviolet light absorber (UVA) of the hydroxyphenyl benzotriazole class.It has lowvolatility at high temperatures and high resistance to thermal degradation for compounding and molding applications.It ishighly effective for polymersprocessed at high temperaturesuch as polycarbonate, polyester, polyacetal, PPO, polyamide, aromatic copolymers, thermoplastic polyurethane and polyurethane fibers etc.. Itisalso useful in the light stabilization of powder coatings and solvent-based coatings. info at hhochem. com