UV Absorber UV-329

Chemical Name: 2-(2’-hydroxy-5’-t-octylphenyl)benzotriazole CAS NO.:3147-75-9 Molecular Formula：C20H25N3O Molecular Weight：323 Specification Appearance: White to slightly yellowish crystalline powder or granule Melting point: 103-107°C Clarity of solution (10g/100ml Toluene): Clear Color of solution (10g/100ml Toluene): 440nm 96.0% min (Transmission) 500nm 98.0% min Loss on drying: 0.3% max Assay (by HPLC): 99.0% min Ash: 0.1% max Application UV- 329 is a unique photo stabilizer that is effective in a variety of polymeric systems: particularly in polyesters, polyvinyl chlorides, styrenics, acrylics, polycarbonates, and polyvinyl butyal. UV- 329 is especially noted for its broad range UV absorption, low color, low volatility, and excellent solubility. Typical end-uses include molding, sheet, and glazing materials for window lighting, sign, marine and auto applications. Specialty applications for UV- 5411 include coatings (particularly themosets where low volatility is a concern), photo products, sealants, and elastomeric materials. Usage 1. Unsaturated Polyester : 0.2-0.5wt% based on polymer weight 2. PVC: Rigid PVC : 0.2-0.5wt% based on polymer weight Plasticized PVC : 0.1-0.3wt% based on polymer weight 3. Polyurethane : 0.2-1.0wt% based on polymer weight 4. Polyamide : 0.2-0.5wt% based on polymer weight Package and Storage 1. 25kg carton 2. Stored in sealed, dry and dark conditions