A process for producing a resin used for optical materials which process comprises curing a composition comprising an ultraviolet light absorbent and an epithio compound by polymerization in the presence of a catalyst, wherein amounts of the ultraviolet light absorbent and the catalyst each expressed as parts by weight per 100 parts by weight of the total amount of the epithio compound, the ultraviolet light absorbent and the catalyst satisfy both of the following relations (a) and (b):(a)0.001 ≦ ultraviolet light absorbent ≦ 1. 000(b).0.001 ≦ catalyst ≦ 5.000
Coloration and clouding of the material of a lens obtained by polymerization of an epithio compound caused by addition of an ultraviolet light absorbent can be prevented.
一种生产光学材料用
树脂的工艺,该工艺包括在催化剂存在下通过聚合固化由紫外光吸收剂和表
硫基化合物组成的组合物,其中紫外光吸收剂和催化剂的量分别以表
硫基化合物、紫外光吸收剂和催化剂总量每100重量份的重量份数表示,满足以下关系(a)和(b):(a)0.001 ≦
紫外线吸收剂 ≦ 1. 000(b).0.001 ≦ 催化剂 ≦ 5.000
可防止因添加
紫外线吸收剂而使表
硫醇化合物聚合得到的镜片材料变色和混浊。