| Chemical name | 2-hydroxy-4-n-oxydiphenyl ketone |
| Molecular formula | C21H27O3 |
| Molecular weight | 326 |
| Appearance | light yellow crystalline powder |
| Melting point | 48-49℃ |
| Relative density (25℃) | 1.1 |
| Ash | less than 0.1% |
| Transmittance | (in toluene of 10g/100ml) 300-400nm ≥93% |
| Solubility | methanol: 1 |
| ethanol: 3 | |
| benzene: 72 | |
| acetone: 35 | |
| methyl ethyl ketone: 65 | |
| water: insoluble |
Product Features:
A) It has a high absorption capacity of ultraviolet light in the ultraviolet spectrum (especially 300-400nm), so it has excellent light stability effect on plastic products.
B) Excellent compatibility with thermoplastic resins, especially polyolefins, thus ensuring uniform dispersion in the polymer.
C) Very low evaporation pressure, to avoid the loss of products in the process.
D) Low migration, no frost spray phenomenon.
E) Excellent heat resistance, no significant degradation and volatilization at the extrusion temperature.
F) Chemically inert in resins and dressings commonly produced by plastic manufacturers.
G) Does not cause odor to resin.
H) Unique high purity, no negative impact due to impurity.
Product application:
Polymer is easily affected by ultraviolet light, resulting in changes in physical properties. Elasticity decreases to zero, particles become brittle and lose mechanical strength. Laboratory and outdoor practice has proved that 531 protects polymer very effectively
1. Polyethylene: Both high-density and low-density polyethylene are highly effective. The recommended usage for polyethylene flat yarns, monofilaments, and films is 0.2-0.5%. For low-pressure components and blow-molded products, the recommended usage is 0.15-0.3%. It performs exceptionally well in agricultural films, extending their lifespan by 2-3 times. The suggested usage is 0.5%
2. Polypropylene: 531 is very effective in both colored and colorless polypropylene. The amount of UV absorber increases with the decrease of product thickness. Fiber, monofilament, plain yarn, ribbon, net and film usage: 0.5%. Injection molding: 0.2-0.3%
3. PVC: Ordinary PVC, whether plasticized or not, will yellow and change its physical properties under UV light, especially the plasticized PVC will develop dark spots on the surface. The typical addition rates are: Soft PVC:0.3-2%. Hard PVC: 0.3%
4. For SBS and PS modified TPR material, the general dosage is 0.3%
5. Others: Recommended dosage: 0.1-0.3%. Before use, a small test should be conducted to determine the final formula
Toxicity, safety and storage: no irritation to human skin, safe handling and operation; when storing, it should be kept dry and placed in a cool place.
Hot Tags: uv absorber-531, China uv absorber-531 factory, Liquid UV absorbent, plastic yellowing resistant agent, inorganic uv absorbers, absorber uv, UV Absorber 329, UV Absorber P
