Recording material and compound
AssigneeNippon Soda Co., Ltd.
InventorsHiroshi Sakai, Kayoko Tada, Shuntaro Kinoshita
Life of this patent
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Abstract
An object of the present invention is to provide a recording material or a recording sheet using, as a color-developing agent, a non-phenol-based compound good in color developing performance and the like. A compound represented by the following formula (I) is used as the color-developing agent: (wherein X represents CH2 or the like; R1 to R3 each independently represent a hydrogen atom, a halogen atom or the like; n1 and n3 each independently represent any integer of 1 to 5; two groups represented by R3 adjacent to each other on a benzene ring optionally bond to each other to form an optionally substituted 6-membered ring; and n2 represents any integer of 1 to 4).
Claims2
A recording material containing a color former and at least one compound selected from the group consisting of compounds represented by the following formula (I):
- wherein:
- X represents CH2, C═O, or SO2;
- R1 to R3 each independently represent a hydrogen atom, a halogen atom, a nitro group, a cyano group, a linear, branched or cyclic C1-C6 alkylcarbonyl group, a linear, branched or cyclic C1-C6 alkyl group, a linear, branched or cyclic C1-C6 alkoxy group, a C2-C6 alkenyl group, a linear, branched or cyclic C1-C6 fluoroalkyl group, a N(R4)2 group, wherein R4 represents a hydrogen atom, a phenyl group, a benzyl group, or a linear, branched or cyclic C1-C6 alkyl group, a NHCOR5 group, wherein R5 represents a linear, branched or cyclic C1-C6 alkyl group, an optionally substituted phenyl group, or an optionally substituted benzyl group;
- n1 and n3 each independently represent any integer of 1 to 5;
- two groups represented by R3 adjacent to each other on a benzene ring optionally bond to each other to form an optionally substituted 6-membered ring;
- n2 represents any integer of 1 to 4;
- and
- when X is SO2, at least one R1 and/or at least one R2 is not a hydrogen atom.
Dependencies are inferred from the claim text.