2-Hydroxybenzophenone derivatives of formula I
wherein E₁, E₃, E₄, L, n, and T are as defined in Claim 1, substituted in the 4'-position by a thioether moiety exhibit enhanced absorption in the UV at longer wavelength. Compositions comprising organic material subject to actinic degradation are beneficially stabilized with such derivatives.
式 I 的
2-羟基二苯甲酮衍
生物
其中 E₁、E₃、E₄、L、n 和 T 如权利要求 1 所定义,在 4'- 位被
硫醚基团取代,在紫外线中具有更强的长波长吸收能力。使用此类衍
生物可有效稳定由受光降解的有机材料组成的组合物。