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Off - white Powder / Granule Ultraviolet Absorbers , Benzotriazole UV Absorber
Quick Detail :
UV 329 is a UV absorber of the hydroxyphenylbenzotriazole class , which imparts out - standing light stability to plastics and other organic substrates .
Description :
- Name : UV329
- Chemical name : 2 - ( 2' - hydroxy - 5' - tert - octylphenyl ) - 1H - benzotriazole
- CAS No. : 3147 - 75 - 9
UV328 exhibits strong absorbance in the 300 - 400nm region and minimum absorption in the visible region ( 400nm ) of the spectrum . The absorption maximum area is at 301nm and 343nm in chloroform solution .
Applications :
UV 328’s use level ranged between 0.1 and 1.0 % depending on the substrate and performance requirements of the final application . The product can be used alone or in the combination of other additives . It could particularly get a good performance in the combination of hindered amine light stabilizers such as LS 770 , LS 622 , LS 791 and so on .
Specifications :
| Appearance | Off-white Powder or Granule |
| Assay (GC) | 99% min |
| Melting Point | 103-105 |
| Volatile | 0.3% max |
| Ash | 0.05% max |
| Transmittance | 460nm 97.0% min |
| 500nm 98.0% min |
Competitive Advantage :
TINUVIN 329 protects polymers from UV radiation and , helping to preserve the original appearance and physical integrity of molded articles , films , sheets and fibers during outdoor weathering .
Hongkun is one of the important manufacturers of UV328 in China with the same quality of BASF , and the application effect has been proved by many customers .
