Light stabilizer (English name Light stabilizer; photostabilizer) is an additive of polymer products (such as plastic, rubber, paint, synthetic fiber), it can shield or absorb ultraviolet energy, quench singlet oxygen and hydrogen peroxide The decomposition of substances into inactive substances and other functions enable the polymer to eliminate or slow down the possibility of photochemical reactions under light radiation, prevent or delay the process of photoaging, and thus achieve the purpose of extending the service life of polymer products.