UV absorber UV-P
Active ingredient: The response product of o-nitroaniline and p-cresol
Residence and also utilizes: Appearance is colorless or light yellow crystal. Soluble in different organic solvents such as gasoline, benzene, acetone, etc. The solubility in water is really tiny, and also it will not be disintegrated by concentrated antacids and concentrated acid. It can develop salts with heavy metal ions. It can soak up ultraviolet rays with a wavelength of 270-280nm. The melting point is 130-131 ° C. UV absorber UV-P is generally utilized in polyester, chlorinated polyester, acetate fiber, polyvinyl chloride, polystyrene, plexiglass, polyacrylonitrile and also various other materials. The security in clear items is much better than in tinted items. The dosage in the finished item is 0.% ~ 0.5%.
UV absorber UV-9
Active ingredients: 2,4-Dihydroxybenzophenone
Residence and makes use of: This product is light yellow or white crystalline powder. Density 1.324 g/cm3. The melting point is 62-66 ° C. Boiling point 150 ～ 160 ° C( 0.67 kPa), 220 ° C( 2.4 kPa). Soluble in most organic solvents such as acetone, ketone, benzene, methanol, ethyl acetate, methyl ethyl ketone and ethanol, insoluble in water. The solubility of this item in some solvents (g/100g solvent, 25 ° C )is 56.2 for benzene, 4.3 for n-hexane, 5.8 for ethanol (95%), 34.5 for carbon tetrachloride, 51.2 for styrene, and 18.7 for DOP.
Ultraviolet absorber UV-9 appropriates for different plastics such as polyvinyl chloride, polyvinylidene chloride, polymethyl methacrylate, unsaturated polyester, abdominal muscle material and also cellulose material, and the maximum absorption wavelength variety is 28 ~ 340nm. The general dosage is 0.1% to 1.5%. It has excellent thermal security as well as does not break down at 200 ° C. This item barely takes in noticeable light, so it appropriates for light clear products. This item can also be used in paint and synthetic rubber.
Safety and security preventative measures: Japan and Italy stipulate that when this product is made use of in items that come into contact with food, the optimum dose ought to not go beyond 0.3%.
UV absorber UVP-327
Component: 2-( 2′- Hydroxy-3′,5′- di-tert-phenyl) -5- chlorobenzotriazole.
Performance and application: The characteristics and also application of ultraviolet absorber UVP-327 resemble those of UV-326. It can highly soak up ultraviolet rays with a wavelength of 270-380nm, and also has great chemical stability as well as very little volatility. Good compatibility with polyolefins. Especially ideal for polyethylene as well as polypropylene. On top of that, it can additionally be made use of in polyvinyl chloride, polymethyl methacrylate, polyoxymethylene, polyurethane, unsaturated polyester, abdominal resin, epoxy resin and also cellulose material, and so on. This item has exceptional warmth sublimation resistance, cleaning resistance, gas fading resistance and also mechanical property retention. It has a significant collaborating effect when made use of in combination with antioxidants. To boost the thermo-oxidative security of the product. The basic dose of this product in plastics is 1% to 3%.
Safety preventative measures: This product has reduced poisoning. Japan, the USA, France, and Italy have actually authorized this item to be utilized in polyolefin plastics that enter contact with food, with a maximum dose of 0.5%. For various other plastics that enter contact with food, the optimum dosage specified in Italy is 0.2%, and 0.5% in Japan as well as France.