UV absorbent UV-531 is a kind of anti-aging additives with excellent performance and high efficiency, can absorb 270-340 nm UV light, with light color, non-toxic, good compatibility, small migration, easy to process and other characteristics. It provides maximum protection to the polymer and helps to reduce color, while delaying yellowing and arresting the loss of physical properties. It is widely used in PE, PVC, PP, PS, PC, plexiglass, polypropylene fiber and ethylene vinyl acetate and other aspects. And for the dry phenolic and alkyd varnish, polyurethane, acrylic acid, epoxy and other air-drying products and automobile refit paint, powder coating, polyurethane, rubber products, etc., to provide them with good light stabilization effect. The dosage of 0.1% to 0.5%.