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 R
1a
to R
9a
is a monovalent sulfur-containing group represented by the following Formula (i-1) or Formula (i-2):
wherein R
10a
to R
12a
each represent a divalent hydrocarbon group or the like; and R
13a
represents a monovalent hydrocarbon group or the like.
提供了一种用于赋予紫外线吸收性能的添加剂,或者用于赋予高折射率的添加剂,该添加剂与作为基体的
树脂具有良好的相容性,并且即使在高浓度下添加也能保持高透明度。还提供了一种通过一种添加剂实现赋予紫外线吸收性能和高折射率功能的添加剂。该添加剂由以下式(I)表示:其中R1至R9中至少有一个是由以下式(i-1)或式(i-2)表示的一价含
硫基团:其中R10至R12分别表示二价碳氢基团或类似物;R13表示一价碳氢基团或类似物。