RIASORB UV-622 HALS Low Basic Light Stabilizer
Low salt, high molecular weight hindered amine light stabilizer
RIASORB UV-622 is a low-basicity N-R type HALS. HALS protects polymers from UV-induced photodegradation and thermal decomposition caused by long-term heat by capturing radicals generated within the polymer. RIASORB UV-622 has high compatibility with polymers, excellent volatility resistance, migration resistance, and extraction resistance, as well as outstanding thermal stability during processing. RIASORB UV-622 has a low melting point and is used in PP, PE, PS, unsaturated polyester, PMMA, PVC, and elastomers. It interacts minimally with pigments and demonstrates high weather resistance in outdoor applications when combined with phenolic antioxidants, phosphorous antioxidants, and HALS or UV absorbers of different molecular weights. UV-622 has an alkyl group coordinated to the piperidine ring, resulting in a lower basicity structure compared to N-H types like UV-770. If there are concerns about the acidity of the polymer or formulation, the use of UV-622 is recommended. Caution is necessary when used in combination with thioether-based antioxidants such as DSTP and DLTP, as they may have antagonistic effects.
- Company：Rianlon Corporation
- Price：Other
