HINDERED AMINE LIGHT STABILIZERS (HALS)
HALS function as light stabilizers by scavenging the radical intermediates in the photo-oxidation process. An important feature differentiating hindered amines from other classes of stabilizers is their ability to act by a regenerative mechanism. While the exact nature of this mechanism is still subject to debate, it is generally accepted that a single hindered amine is capable of deactivating multiple photo-oxidation chains. As a result, they have proven to be highly effective for the light stabilization of polyolefins and other plastics. Some HALS (such as LA-52MP, LA-57, LA-63P, and LA-68) also contribute to the thermal stability of plastics. Combinations of HALS and UV absorbers often provide synergistic performance.
Amfine offers a complete range of HALS products, including conventional low molecular weight types (LA-72, LA-77Y), unique medium molecular weight types (LA-52MP, LA-57), high molecular weight types (LA-63P, LA-68), non-basic NO-Alkyl HALS (LA-81), and a co-polymerizable product (LA-82). We also provide innovative, fully formulated light stabilization systems based on proprietary technology from ADEKA (LA-402AF, LA-502XP).