A UV absorber is a light stabilizer that absorbs the ultraviolet portion of sunlight and fluorescent light sources without altering itself. Because sunlight contains a lot of ultraviolet light, they cause harm to colored objects, and their wavelength is about 290-460 nanometers. They are carried out through chemical oxidation and reduction (Redoxreaction), and finally decompose color molecules to prevent harmful ultraviolet light from destroying colors. The methods include physical and chemical. Here only a brief introduction to chemical methods, even if the UV absorber is used to effectively block the object to be protected, it can also weaken its damage to the color.
Ultraviolet absorbers must meet the following conditions:
① Can strongly absorb ultraviolet rays (especially wavelength 290-400nm);
②Good thermal stability, even if It is not affected by high temperature during processing, and has low thermal volatility;
③Good chemical stability and will not adversely affect the material components in the product;
④Miscibility Good, can be evenly dispersed in the material, no blooming, no seepage;
⑤The absorbent itself has good photochemical stability, no decomposition, no discoloration;
⑥No Color, non-toxic, odorless
;
⑦washable;
⑧cheap and good quality, easy to get;
⑨insoluble or difficult to dissolve in water.
According to the chemical structure, UV absorbers can be divided into: salicylates, benzophenones, benzotriazoles, substituted acrylonitriles, triazines and hindered amines.
Basf BASF UV Absorber TinuvinP is a light stabilizer that can be used for plastics and other organic substances, its physical form: white to light yellow powder content: 99%, molecular type: C13H11N3O application industry plastic industry, powder coating industry, coating industry . BASF light stabilizer UV-P is a light stabilizer that can prevent UV-P from degrading plastics and other organic materials. It can prevent the degradation of ultraviolet rays caused by UV-P, thereby slowing down the yellowing of plastics and the decline in mechanical properties.
Can be used on PVC, polystyrene, polyester, acrylic, vinyl/acrylic polymers, polyurethane, polycarbonate and fiber. Its UV absorber P can be used in conjunction with antioxidants and other light stabilizers to increase the light and heat stability of UV-P on plastics.
Under ultraviolet radiation, it can protect its degradation, thereby slowing down the yellowing of plastics and the decline of mechanical properties. The material works by selectively absorbing ultraviolet light from sunlight (the main cause of plastic degradation) and converting it into harmless heat. Compatible with PVC, polystyrene, polyester, acrylic, vinyl/acrylic polymers, polyurethane, polycarbonate and fibers. TinuvinP can be used together with antioxidants and other light stabilizers to increase the photothermal stability of TinuvinP to plastics.
UV ultraviolet absorber TinuvinP forms high-color complexes with iron or cobalt ions. In this case, Tinuvin320 or Tinuvin327 are suggested. Redox and reducing agents during polymerization-vulcanization do not affect the stability of TinuvinP. TinuvinP has good thermal stability and is suitable for high-temperature processing in common processing environments such as polycarbonate.
Basff UV absorber: C81.770.622.944.326.329.791.UV-P.783.123.292.400.1130.328.384-2.900.5151.5060.477.479.303.3035.
Tag:   UV Absorber Light Stabilizer
