申请人:UNITIKA LTD.
公开号:EP0186364A2
公开(公告)日:1986-07-02
A photochromic compound represented by formula (I):
wherein one of X1 and X2 represents a hydroxyl group, a sulfonic acid group or an alkali metal sulfonate base, and the other of X1 and X2 represents a hydrogen atom; X3 and X4 each represents a hydrogen atom, a lower alkyl group having from 1 to 3 carbon atoms, a lower alkoxy group having from 1 to 3 carbon atoms, a halogen atom, a nitro group or a cyano group; and R represents a straight chain alkyl group having from 1 to 30 carbon atoms. The compound exhibits excellent color developability.
一种由式(I)表示的光致变色化合物:其中 X1 和 X2 中的一个代表羟基、磺酸基或碱金属磺酸基,X1 和 X2 中的另一个代表氢原子;X3 和 X4 分别代表氢原子、具有 1 至 3 个碳原子的低级烷基、具有 1 至 3 个碳原子的低级烷氧基、卤素原子、硝基或氰基;R 代表具有 1 至 30 个碳原子的直链烷基。 该化合物具有极佳的显色性。