Light Stabilizer UV-622, identified by CAS 70198-29-7, is a high molecular weight hindered amine light stabilizer (HALS) that serves as a critical additive in the polymer industry. This oligomeric compound is characterized by its exceptional thermal stability and low volatility, making it particularly effective for applications requiring long-term durability under harsh environmental conditions. Its chemical structure, a polyester of succinic acid and a substituted piperidine ethanol, allows it to function as a highly efficient radical scavenger that inhibits the photo-oxidative degradation of plastics.
In industrial and research contexts, this stabilizer is valued for its superior resistance to extraction and its excellent compatibility with a wide range of thermoplastic substrates. Its high molecular weight ensures that the additive remains within the polymer matrix even during high-temperature processing or prolonged exposure to solvents. By mitigating the harmful effects of ultraviolet radiation, it helps maintain the mechanical integrity, color, and surface appearance of finished goods, thereby extending their functional lifespan.