UV ABSORBER: UV-326

Chemical name	2-(2'-Hydroxy -3' -tert-butyl-5'-methylphenyl)-5-chloro benzotriazole
CAS NO.	3896-11-5
Introduction	UV-326 is a benzotriazole type UV absorber. It offers superior light protection of polyolefin substracts against the deterioration of UV radiation, It is also efficient for the light stabilization of polyvinyl chloride, unsaturated polyurethane, styrenic polymers, coatings and lacquers.
Physical properties	Molecular Weight: 315.5 Appearance: slightly yellowish crystal powder Melting Point: 138 -141 Deg.C Transmitting: 460nm: 93% min 500nm: 96% min Ash content: 0.3% max
Advantage	• Very high photostability for its strong ability to absorb light especially in UV region(290-400nm) • Odorless, does not bring smells to the polymers. • High resistance to thermal degradation. • Low vapor pressure, very little or no loss during processing.
Applications	• Styrenic polymers: 0.2-0.5wt% for PS based on polymer weight. 0.5-2.0wt% for ABS based on polymer weight. • Polyvinyl chloride: 0.2-0.5wt% for PVC based on polymer wt. • Polypropylene: 0.3-0.6wt% for PS based on polymer weight. • Coatings and lacquers: 0.5-1.0wt% for nitrocellulose based on polymer weight. • Unsturated Polyester: 0.2-0.4wt% for PS based on polymer wt.
Toxicity & Safety	UV-326 can be safely handled without irritation caused to the skin.
Package	In 25 kg carton drum with inner plastic bag.
Storage	In a closed system and dry, dark place without any light exposure.