UV-328
CAS NO.: 25973-55-1
Chemical name:2-(2H-hydroxy-3-5-Di-tert-Amyllphenyl)benzotriazole
Molecular formula: C22H29N3O
Molecular weight：351.5
Structural Formula:
Specification:
Appearance：slightly yellow crystalline powder
Assay(GC)：99.0%min
Melting range：78-82℃
Volatile：0.2%max
Ash：0.1%max
Light transmittance： 460nm 97%min
(10g in 95ml toluene) 550nm 98%min
Clarity of solution：10g in 95ml toluene form a clear solution at room temperature
Solubility(20℃,w/w%)：Acetone 6,Benzene 39,Cyclohexane 26，
Ethyl acetate 16, Toluene 33，Methyl ethyl ketone 14
Methyl methacrylate 19
Application：It is a high performance Ultraviolet Absorber of benzotriazole type. Its maximum ultraviolet absorption peak is 345nm, its light stability is similar to OCTASORB UV-326 and OCTASORB 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.. It has a fine light stability too in various kinds of coating.
Usage: Unsatruated Polyester, 0.2~0.4 wt % based on polymer weight;
PP, 0.3~0.6 wt % based on polymer weight;
PVC: Rigid PVC, 0.2~0.5 wt % based on polymer weight;
Plasticized PVC, 0.1~0.3 wt % based on polymer weight;
Coatings, 1.0~3.0 wt % based on solid weight;
PU, 0.3~1.0 wt % based on polymer weight;
PC, 0.15~0.3% based on polymer weight;
Polyacrylate, 0.15~0.3wt % based on polymer weight;
Toxicity and safety: It is nontoxic, uninflammable, unexplosive and incorrosive, has good storage stability. LD 50:≥5000mg/kg
Packing: Fiber drum or cardborad drum inner lining plastic bag, each drum 25kg net weight or as required by the customers.
Storage: It should be stored in a close system and kept in a dry, close and shade place.
