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Date/Time:  5/16/21 13:03 GMT
 

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 formula: C30H29N3O
Molecular weight: 447.6
Molecular structure


Specification
Appearance: Light yellow powder
Purity, %: ≥ 99
Melting point,℃:139.5-141
Volatile matter, %: ≤ 0.5
Ash, %: ≤ 0.05
Transmittance 450nm≥97%
500nm≥98%

Solubility (20℃, g/100ml solvent)
Acetone:2 n-Hexane: 0.6 Benzene: 10 Ethyl acetate: 4 Toluene:
20
Chloroform: 35 Methylene chloride: 34 Ethanol: 0.3 Cyclohexane: 5 MEK: 13
Methanol<0.1 Water<0.01

Application
UV ABSORBER HOSORB-234 is a high molecular weight ultraviolet light absorber (UVA)
of the hydroxyphenyl benzotriazole class. It has low volatility at high
temperatures and high resistance to thermal degradation for compounding and
molding applications. It is highly effective for polymers processed at high
temperature such as polycarbonate, polyester, polyacetal, PPO, polyamide, aromatic
copolymers, thermoplastic polyurethane and polyurethane fibers etc.. It is also
useful in the light stabilization of powder coatings and solvent-based coatings.
info at hhochem.com
UV ABSORBER UV 234   CAS NO.70321-86-7
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