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US 11,142,015 B2Granted
Recording material, and recording sheet
AssigneeNippon Soda Co., Ltd.
InventorsShuntaro Kinoshita, Kayoko Nomura, Kazumi Hamakawa, Hiroshi Sakai
Life of this patent
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Abstract
A recording material and a recording sheet having excellent color-developing performance and storage stability and particularly having excellent heat-resistance of background. The recording material contains a color former (A), a compound represented by formula (I) (B), and a compound represented by formula (II) (C).
Claims9
A recording material comprising
- (A) at least one color former,
- (B) at least one compound selected from the group consisting of compounds represented by the following formula (I):
- and
- (C) at least one compound selected from the group consisting of compounds represented by the following formula (II):
- wherein
- R and R′ represent a hydrogen atom, a halogen atom, a nitro group, a C1 to C6 alkyl group, a C1 to C6 alkoxy group, a C2 to C6 alkenyl group, a C1 to C6 haloalkyl group, an N(R4)2 group AR5, a phenyl group optionally having a substituent, or a benzyl group optionally having a substituent,
- R4 represents a hydrogen atom, a phenyl group, a benzyl group, or a C1 to C6 alkyl group,
- A represents a group represented by SO2—NH, NH—SO2, CO—NH, or NH—CO,
- R5 represents a phenyl group optionally having a substituent, a 1-naphthyl group optionally having a substituent, or a 2-naphthyl group optionally having a substituent,
- n and n′ each independently represent any integer of 1 to 5, and
- X represents O or S.
8 more elements
Dependencies are inferred from the claim text.