Thermosensitive recording material
AssigneeOji Paper Co., Ltd.
InventorsYoshiyuki Takahashi, Akiko Iwasaki, Kunitaka Toyofuku
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Abstract
A thermosensitive recording material capable of recording thereon colored images having high resistances to oily substances, plasticizers, moisture, and heat and an excellent storage persistency over a long time, comprises a thermosensitive colored image-forming layer formed on a sheet substrate and comprising a colorless dye precursor, a color developing agent, and a binder, the color developing agent comprising at least one compound of the formula (I): ##STR1## wherein X is an O or S atom, R is an unsubstituted aromatic group or an aromatic group substituted by a lower alkyl or halogen atom; A represents a multivalent group, and n is an integer of 2 or more.
Claims6
A thermosensitive recording material comprising:
- a sheet substrate and
- a thermosensitive colored image-forming layer formed on a surface of the sheet substrate and comprising a substantially colorless dye precursor, a color developing agent reactive with the dye precursor upon heating to thereby develop a color, and a binder,
- said color developing agent comprising at least one compound of the formula (I):
- ##STR19## wherein X represents a member selected from the group consisting of oxygen and sulfur atoms, R represents a member selected from the group consisting of unsubstituted aromatic hydrocarbon groups and substituted aromatic hydrocarbon groups having at least one substituent selected from the group consisting of lower alkyl groups and halogen atoms;
- A represents a multivalent group, and n represents an integer of 2 or more.
Dependencies are inferred from the claim text.