UV absorber is benzotriazole mixture A:50%-52%(C2-H4-O)6-7-C19H21N3O3 b-[3-(2-H-benzotriazol-2-yl)-4-hydroxy-5-tert-butyl phenyl]-propionic acid polyethylene glycol 300 ester The UV absorber is a hydroxyphenylbenzotriazole type UV absorber, which can effectively protect the gloss of the coating, avoid cracks and spots, the product is easy to emulsify, and is especially suitable for water-based systems. Dispersion of UV absorbers in aqueous systems can be obtained by dissolving in water-soluble solvents such as diethylene glycol diethyl ether. UV absorbers with good high temperature resistance and anti-extraction properties are especially suitable for industrial and automotive coatings with high weather resistance requirements, and can also provide sufficient protection for sensitive substrates such as wood. UV absorbers are used with hindered amines (HALS), such as light stabilizers 292 or 123. These shared synergists can significantly improve coating performance and prevent gloss loss, cracking, blistering, peeling and discoloration.

UV Absorber 531 Chemical name:  2-hydroxy-4-n-octyloxybenzophenone   Molecular formula C21H26O3 Molecular weight 326 CAS number 1843-05-6 Product introduction:   UV absorber UV-531 is a highly efficient anti-aging additive with excellent performance, which can absorb 240-340 nanometer ultraviolet light, with light color, non-toxic, good compatibility, small migration, easy to process and so on. It provides maximum protection to the polymer and helps reduce color while retarding yellowing and retarding physical property loss.   Physical Properties:   Appearance: Light yellow powder Content: ≥99% melting point: 47-49℃ Gray: ≤0.1% Transmittance: 460nm≥97% 500nm≥98%  Dry loss: ≤0.5% Application:It is widely used in PE, PVC, PP, PS, PC, plexiglass, polypropylene fiber and vinyl acetate, etc. Alkyd varnishes, polyurethanes, acrylics, epoxies and other air-drying products, as well as automotive refinish paints, powder coatings, rubber and other products provide good light stabilization. The dosage is 0.1-0.5%. Packaging: Package in cardboard drum lined with plastic bag, 20KG/drum. Storage: Protect against rain, moisture and sun. Validity period:2 years

UV Absorber UV-329 Chemical name:  2-(2'-hydroxy-5'-(1,1,3, 3-Tetramethylbutyl)phenyl)benzotriazole 

UV Absorber UV-328 Chemical name:  2-(2’-hydroxy-3’-5’-di-tert-amylphenyl)benzene Triazole  Molecular formula C22H29N3O Molecular weight 351.5 CAS number 25973-55-1 Product introduction: This product has excellent photostability to plastics and other organic substances. Recommended for use in styrene polymers, copolymers, acrylic polymers, unsaturated polyesters, polyvinyl chloride, polyolefins, urethane formic acids, polyacetals, vinyl chloride butyrals, elastomeric polymers and adhesives .   Physical Properties:   Appearance: Light yellow powder Content: ≥99% melting point: ≥80℃ Gray: ≤0.1% Transmittance: 460nm≥97% 500nm≥98%  volatiles: ≤0.3% Applications:UV-328 is a highly effective stabilizer for a range of plastics and other organic substrates. Including homopolymers and copolymers of styrene, acrylic polymers, unsaturated polyesters, PVC, polyolefins, polyurethanes, polyacetals, polyvinyl butyrals, elastomers and adhesives, etc. UV-328 has the characteristics of strong ultraviolet absorption, light initial color, good compatibility with various substrates, good solubility in plasticizers and relatively low volatility. It can maintain the original appearance of the substrate and Integrity of appearance. UV-328 can be used alone or in combination with other stabilizers, such as: HALS, antioxidants and other functional stabilizers and auxiliaries. UV-328 has a synergistic effect when used in combination with hindered amine light stabilizers. The dosage of UV-328 depends on the performance requirements of the substrate and the final application, and the dosage is 0.10-1.0% Packing: Packing in cardboard drums lined with plastic bags, 20KG/drum, or according to customer requirements. Storage: This product has good storage stability, and high temperature and humidity should be avoided during storage and transportation.