A hydroxydiphenyl sulfone derivative represented by the formula [1] is a novel compound and a heat-sensitive recording material which comprises at least one of the derivatives as a color acceptor not only has an excellent recording sensitivity, resistances to plasticizer and diazo developer but also suits to high-speed recording, has an excellent storage stability of record images and does not decrease in whiteness of the background,
wherein R' and R2 are each hydrogen, halogen, lower alkyl, lower alkoxyl or hydroxyl and n is an integer of 3 or 4.
由式[1]表示的羟基
二苯砜衍
生物是一种新型化合物,由至少一种该衍
生物作为颜色接受体的热敏记录材料不仅具有极佳的记录灵敏度、抗
增塑剂和重氮显影剂性,而且适合高速记录,记录图像的存储稳定性极佳,背景白度不会降低,其中 R' 和 R2 分别为氢、卤素、低级烷基、低级烷氧基或羟基,n 为 3 或 4 的整数。