Patent ID: 6261992
Filing Date: 2001-07-17
Classification: B41M

Abstract:
A reversible thermosensitive recording material comprising a recording layer which is formed overlying at least one side of a substrate and which comprises an electron donating coloring agent and an electron accepting color developer,wherein the recording layer achieves a colored state when heated at a temperature not lower than an image forming temperature and then cooled at a cooling speed, and the recording layer in the colored state achieves a non-colored state when heated at a temperature lower than the image forming temperature and not lower than an image erasing temperature, or when heated at a temperature not lower than the image forming temperature and then cooled at a cooling speed relatively slow compared to the first-mentioned cooling speed,and wherein the recording layer further comprises an erasure promoter including one or more secondary amide groups having a formula selected from the group consisting of the following formulas (1), (2) and (3): ##STR237##wherein each of R1, R2, R3, R4 and R5 independently represents a hydrocarbon group which is optionally substituted and which may be saturated or unsaturated, and wherein R1 and R2 are optionally combined to form a ring which may include one or more of a nitrogen atom, an oxygen atom and a sulfur atom.