2-(2-Hydroxyphenyl)-2H-benzotriazole UV-absorbers substituted at the 5-position of the benzo ring by a thioether group exhibit enhanced absorption in the near visible range (over 350 nm) allowing said compounds to be particularly effective in protecting polymer systems which are prone to degradation caused by actinic irradiation with wavelengths over 350 nm.
在苯环的5位被
硫醚基取代的2-(2-羟基苯基)-2H-苯并三唑紫外吸收剂,表现出在近可见光范围(超过350纳米)具有增强吸收能力,使得这些化合物特别有效地保护易受350纳米以上波长的光照引起降解的聚合物系统。