1,1-BIS(4-HYDROXYPHENYL)-1-PHENYLETHANE AND THERMAL RECORDING MATERIAL FOR RECORDING THE SAME

摘要

This invention provides 1,1-bis(4-hydroxyphenyl)-1-phenylethane having a crystal form characterized by an X-ray diffraction pattern having one sharp and strong peak at 16.4° and three sharp peaks of intermediate intensity at each of 13°-16° and 17°-20.8° and at least three peaks of intermediate intensity at 22°-23° as a diffraction angle (2theta) in an X-ray diffractometry with Cu-K alpha-rays, and being capable of giving the storing stability of a colored image and a non-colored portion against heat, water or the like and the low-energy color-developing property suitable for high-speed color development.