Light Stabilizer 770 CAS 52829-07-9

Light stabilizer 770 is also called bis(2,2′,6,6′-tetramethylpiperidinyl) sebacate. Appearance is white crystalline powder. Melting point 81℃～86℃, soluble in ethanol, ethyl acetate, benzene and other organic solvents, insoluble in water. It is a representative variety of low molecular weight HALS. Its light stabilizing effect is high, suitable for products such as polyethylene, polypropylene, polystyrene, ABS, etc., especially in polyolefin products, the light stabilizing effect is 3 to 4 times that of ultraviolet absorbers and nickel quenchers, due to the relative molecular Small in weight, high in volatility, poor in migration resistance and extraction resistance, it is suitable for use in thick products. Limited by its own high alkalinity, it has antagonism effect with halogenated flame retardants, acid dyes, thioesters, and acid resins such as PVC, PC, and PMMA. Recently, it has been combined with high molecular weight HALS, benzotriazole and other ultraviolet absorbers. usage trends.

Hindered amine light stabilizers (HALS) have been a hot topic in the development and research of polymer stabilizers in the past 20 years. Due to the unique and excellent light protection performance of HALS itself, its efficiency is 2-3 times that of general traditional light stabilizers. At the same time, it has a good synergistic effect with UV absorbers, antioxidants and other additives, and does not color the resin. , low toxicity or non-toxic, so it is an additive with broad development prospects. According to statistics in 1996, the annual consumption of HALS in the world has accounted for 54% of the total consumption of light stabilizers in the world, and it is still growing at an annual rate of 8%. Light stabilizer 770 is a typical low molecular weight product among many hindered amine light stabilizers. It came out in the 1970s in Japan’s Sankyo Company and Switzerland’s Ciba-Geigy Company. Later, American Cyamide Company, Goodrich Company, Hearst Company, Borg-Warner Company, Italy’s Chimos Montefluos Company, Japan’s Sumitomo Company, and companies in the Czech Republic, Russia, Germany and other countries successively developed similar products. . Due to its low cost and good light stability, it is widely used in polyolefin materials such as polypropylene, and is still widely studied and applied today.