A thermal recording material of the invention contains, as a storability improver, tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane trapping and containing water and/or methanol and having a crystal structure that shows a maximum X-ray diffraction peak at a diffraction angle 2θ of 6.58° according to X-ray diffraction measurement using an X ray having a wavelength of a Cu—Kα line. The recording material has improved heat resistance in non-printing sections while maintaining the moisture-and-heat resistance in printing sections. The thermal recording material of the invention has a thermal-recording layer that contains the tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane in an amount of preferably 0.1 to 15% by mass with respect to the thermal-recording layer. The amount of the water and/or methanol trapped and contained in the tris(2-methyl-4-hydroxy-5-t-butylphenyl)butane is preferably 0.1 to 10% by mass in total.
该发明的热记录材料中包含一种作为稳定性改进剂的三(
2-甲基-
4-羟基-5-
叔丁基苯基)
丁烷,用于捕获和含有
水和/或
甲醇,并具有晶体结构,根据使用波长为Cu-Kα线的X射线衍射测量,在衍射角2θ为6.58°处显示最大X射线衍射峰。该记录材料在非打印部分具有改进的耐热性,同时保持打印部分的耐
潮湿和耐热性。该发明的热记录材料具有热记录层,其中三(
2-甲基-
4-羟基-5-
叔丁基苯基)
丁烷的含量最好为热记录层的质量百分比0.1至15%。三(
2-甲基-
4-羟基-5-
叔丁基苯基)
丁烷中捕获和含有的
水和/或
甲醇的量最好总质量百分比为0.1至10%。