| 摘要 |
PURPOSE:To obtain a heat-sensitive recording paper having an improvided chromogenic property and an improved preventiveness to the color disappearance of recorded pictures by using a hindered phenolic compound, a colorless electron donative dye, and a p-hydroxy bezoate. CONSTITUTION:A colorless electron donative dye (A) (e.g., 3-diethylamino-6- chloro-7-anilinofluoran, etc.), a p-hydroxy benzoate (B)[e.g., preferably a compound of the formula (R is a C2-C8 alkyl or benzyl)], and a hindered phenolic compound (C)[e.g., preferably a phenol whose 2- or 6-position is substituted with t-butyl group (e.g., 1,1,3-tris(2-methyl-4-hydroxy-5-t-butylphenyl)]are separately dispersed by means of a ball mill, etc. These three dispersions are mixed together, further mixed with an oil-absorptive pigment (e.g., calcium carbonate, etc.), and then coated on a base paper to obtain objective recording paper. |
