A process for tinting a resin for optical materials comprises dipping a resin for optical materials into a liquid comprising an inorganic acid and/or an organic acid and thereafter tinting the resin, wherein the organic acid is a mixture of compound (I) having sulfo group and compound (II) having phenolic hydroxyl group but not having sulfo group and the ratio [(I)/(II)] of the amount by weight of compound (I) to the amount by weight of compound (II) is 0.01 to 2.0.
The resin for optical materials is preferably a resin containing sulfur.
The resin for optical materials may be a resin obtained by curing by polymerization of a compound having one or more structures represented by the following formula (1) in one molecule or a composition comprising said compound:
wherein R1 represents a hydrocarbon group having 1 to 10 carbon atoms, R2, R3 and R4 each represents hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, Y represents S or O, n represents 0 or 1, m represents a number of 1 to 5 and n represents a number of 0 to 5.
The resin for optical materials may also be a resin obtained by curing by polymerization of a compound having one or more structures represented by the following formula (1') in one molecule or a composition comprising said compound:
wherein R1 represents a hydrocarbon group having 1 to 10 carbon atoms, R2, R3 and R4 each represents hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, j represents a number of 1 to 5, k represents a number of 0 to 5, j+k represents a number of 2 or larger and j and k do not represent 1 simultaneously.
The inorganic acid is preferably at least one compound selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid and phosphoric acid.
The organic acid is preferably a compound having at least one group selected from the group consisting of sulfo group, carboxyl group and phenolic hydroxyl group.
A resin for optical materials tinted in accordance with the above process is also provided.
光学材料
树脂着色工艺包括将光学材料
树脂浸入由
无机酸和/或有机酸组成的液 体中,然后对
树脂进行着色,其中有机酸是具有磺基的化合物(I)和具有
酚羟基但 不具有磺基的化合物(II)的混合物,且化合物(I)与化合物(II)的重量比[(I)/(II)]为 0.01 至 2.0。
光学材料用
树脂最好是含
硫树脂。
光学材料用
树脂可以是由具有下式(1)所代表的一种或多种结构的化合物在一个分子中聚合固化而得的
树脂,或由上述化合物组成的组合物:
其中 R1 代表具有 1 至 10 个碳原子的烃基,R2、R3 和 R4 分别代表氢原子或具有 1 至 10 个碳原子的烃基,Y 代表 S 或 O,n 代表 0 或 1,m 代表 1 至 5 的数字,n 代表 0 至 5 的数字。
光学材料用
树脂也可以是通过聚合一个分子中具有下式(1')所代表的一种或多种结构的化合物或包含上述化合物的组合物而固化得到的
树脂:
其中 R1 代表具有 1 至 10 个碳原子的烃基,R2、R3 和 R4 分别代表氢原子或具有 1 至 10 个碳原子的烃基,j 代表 1 至 5 的数字,k 代表 0 至 5 的数字,j+k 代表 2 或更大的数字,且 j 和 k 不同时代表 1。
无机酸最好是至少一种选自
盐酸、
硫酸、
硝酸和
磷酸的化合物。
有机酸最好是具有至少一个选自磺基、羧基和
酚羟基的基团的化合物。
还提供了一种用于按照上述工艺着色的光学材料的
树脂。