Provided is an additive for imparting ultraviolet absorbency, or an additive for imparting a high refractive index, which has satisfactory compatibility with a resin serving as a matrix and can maintain high transparency even if added in high concentrations. Also provided is an additive with which the function of imparting both ultraviolet absorbency and a high refractive index can be realized by means of one kind of additive. This additive is represented by the following Formula (I):
wherein at least one of R1a to R9a is a monovalent sulfur-containing group represented by the following Formula (i-1) or Formula (i-2):
wherein R10a to R12a each represent a divalent hydrocarbon group or the like; and R13a represents a monovalent hydrocarbon group or the like.
本发明提供了一种用于赋予紫外线吸收性的添加剂或用于赋予高折射率的添加剂,它与作为基体的
树脂具有令人满意的相容性,即使添加浓度较高,也能保持高透明度。我们还提供了一种添加剂,它可以通过一种添加剂同时实现紫外线吸收能力和高折射率的功能。这种添加剂由下式(I)表示:
其中 R1a 至 R9a 中至少有一个是由下式(i-1)或式(i-2)代表的一价含
硫基团:
其中 R10a 至 R12a 分别代表二价烃基或类似物;R13a 代表一价烃基或类似物。