Ultraviolet Absorber UV － 328

Product Name ： Ultraviolet Absorber UV － 328
Chemical Name ： 2-(2H-hydroxy-3-5-Di-tert-Amyllphenyl)benzotriazole
Molecular Formula ： C 22 H 29 N 3 O
Product Intro ：
This product is a benzotriazole ultraviolet absorber. It is one of the fine varieties of light stablizer, its advantage are: stable performance, low toxicity, strong ultraviolet absorbability, can be used in the plastic wrappings and children plastics. Can be used in the polypropylene , polyethylene, can be used in such products as the polyvinyl chlornamee, lucite, ABS resin, coating, petroleum products and rubber,etc.. This product has good dissolubility with many kinds of high polymers, and concurrently it has antioxygen performance, can use together with antioxnameant.

Technical Indicators ：
1 Appearance: light yellow powder
2 Content: ≥ 99%
3 Melting Point:80-83 ℃
4 Loss on Drying: ≤ 0.5%
5 Ash Content: ≤ 0.1 ％
6 Light Transmittance 440nm ≥ 97% ； 500nm ≥ 98%
7 Solubleness: It can dissolve in benzene, toluene, ethyl acetate and petroleum ether, slightly dissolve in ethanol and methyl alcohol, can not dissolve in water.

Main Use ：
It is a highperformance Ultraviolet Absorber. Its maximum ultraviolet absorption peak is 345nm, its light stability is similar to UV-326 and UV-327, but this product has good dissolubility with the resins. Its heat volatility is low and its durability to washing is very good. It is mainly used in polyethylene, polypropylene, polystyrene, polyvinyl chlornamee, polyester, epoxy resin, ABS resin and cellulosic resin ,etc., about 1% of general consumption. Has a fine light stability too in various kinds of coating.

Storage & Packaging ：
（ 1 ） UV-328 is nontoxic, uninflammable, unexplosive and incorrosive, has good storage stability.
（ 2 ） cardboard drum inner lining plastic bag, each drum 25kg net weight.