Light stabilizer 788 is a polymeric hindered amine light stabilizer suitable for both thick and thin products, providing significant light stability to a variety of polymers. Its mechanism of action is the same as that of hindered phenols (scavenging free radicals), and it provides long-term thermal stability to polyolefins. Excellent stability can be achieved at low concentrations. Due to its polymeric structure, light stabilizer 788 has very low volatility (even at high processing temperatures), low extractability, and low migration in polymers. Light stabilizer 788 has no negative effect on the initial coloring of the substrate. Its low-dust, free-flowing form makes it very easy to handle.
Chemical name: A polymeric mixture of poly{[((6-(1,1,3,3-tetramethylbutyl)amino)-s-triazine-2,4-diyl)((2,2,6,6-tetramethyl-4-piperidyl)imino)] and a polymer of tetrakis(2,2,6,6-tetramethyl-4-piperidyl) sebacate with dimethyl succinate.
Physical characteristics:
Appearance: white to pale-yellow granules
Molecular weight: Mn > 2500
Solubility (at 25℃):
Water: insoluble <0.01%
Lower molecular weight alcohols: slightly soluble
Methylene chloride: highly soluble
Hydrocarbons: highly soluble
Safe handling: According to the U.S. Occupational Safety and Health Administration (OSHA) Hazard Communication Standard (29 CFR 1910.1200), this product is classified as a hazardous chemical. Please read the Material Safety Data Sheet carefully before handling. This product is for industrial use only.
Applications: Light stabilizer 788 has good compatibility with polyolefin matrices and is suitable for injection-molded parts, flat yarns, films, and fibers
Light Stabilizer 788 -> HS-788 (no dedicated image yet; using actual powder photo)
