UV Absorber 329 UV-329
Chemical Name: 2-(2’-hydroxy-5’-tert-octyl phenyl) benzotriazole
CAS No.: 3147-75-9
EINECS No.: 221-573-5
Molecular Formula: C20H15N3O
Molecular Weight: 323.43
Structural Formula:
Solubility:UV-329 is soluble in benzene, styrene, heptane, ethyl acetate, slightly soluble in ethanol, insoluble in water, and it has a variety of resin has good compatibility.
Property Specification
Appearance White powder
Melting Point 100℃-105℃
Assay Min. 99%(HPLC)
Light Transmittance(440nm) Min. 97%
(500nm) Min. 98%
Ash content Max. 0.1%
Loss on Drying Max. 0.5%
Volatile Matter Max. 0.5%
Applications:
UV-329 has a very effective light stabilizing effect, prevents yellowing and degradation of polymer. Can be used for example, polyolefin, polystyrene PVC, unsaturated polyester, acrylic resin and ABS resin. UV-329 can be used alone, or with other stabilizers used in conjunction. UV-329 and hindered amine light stabilizers when used in combination, have a synergistic effect. The dosage of UV-329 in 0.10-1.0% (A highly effective light stabilizer, it has a broad UV absorption spectrum and low volatility . For PS, polymethyl methacrylate, unsaturated polyester ( UPE ), rigid PVC, polycarbonate, ABS resin, etc, esp . In clear products or engineering plastics processed under high temperature . It has synergetic effect if used with antioxidant, which can raise heat and oxidization stabilities of the product . Usual amount to use is 0.01-1%.
Stability and Storage:
In a closed system and dry, dark place without any light exposure.
Package: 25 kg drum with inner PE bag
Shelf life:24 months
关键字： uv-329;uv-531