Heat-sensitive recording material
AssigneeOji Paper Co., Ltd.
InventorsNobuyuki Iwasaki, Koichi Ishida
Life of this patent
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Abstract
Disclosed is a heat-sensitive recording material comprising a support and a heat-sensitive recording layer formed on the support and containing a leuco dye and a developer, the developer being N-p-toluenesulfonyl-N′-3-(p-toluenesulfonyloxy)phenylurea, and the heat-sensitive recording layer containing (a) at least one fluoran-based leuco dye with a melting point of 190 to 230° C. and/or (b) at least one pigment selected from the group consisting of aluminum hydroxide, amorphous silica, kaolin and talc.
Claims7
A heat-sensitive recording material comprising a support and a heat-sensitive recording layer formed on the support and containing a leuco dye and a developer;
- the developer is N-p-toluenesulfonyl-N′-3-(p-toluenesulfonyloxy)phenylurea, and
- the heat-sensitive recording layer contains (a) at least one fluoran-based leuco dye having a melting point of 190 to 230° C. or 3-di(n-butyl)amino-6-methyl-7-anilinofluoran, and (b) aluminum hydroxide as a pigment in an amount of 3 to 50 wt % based on the heat-sensitive recording layer.
Dependencies are inferred from the claim text.