A color-developing sheet using, as a color developer, polyvalent-metal-modified products of salicylic acid compounds composed mainly of a 3,5-di(a-methylbenzyl)salicylic acid derivative obtained by reacting a salicylic acid ester with an a-methylbenzyl halide in the presence of an acid catalyst and hydrolyzing the reaction product.
Said color-developing sheet has excellent color developability at low temperatures and gives a color of excellent water resistance.
一种使用
水杨酸化合物的多价
金属改性产物作为
显色剂的显色薄片,该
水杨酸化合物主要由 3,5-二(a-甲基苄基)
水杨酸衍
生物组成,
水杨酸酯与 a-甲基苄基卤化物在酸催化剂存在下反应并
水解反应产物而得。
所述显色片材在低温下具有极佳的显色性,并能提供耐
水性极佳的颜色。