Thermosensitive recording medium
AssigneeRicoh Company, Ltd.
InventorsHiroshi Yamada, Tomohisa Kakuda, Takeshi Kajikawa
Life of this patent
Estimating the term…
Abstract
A thermosensitive recording medium including; a support; and a thermosensitive recording layer formed overlying the support and including a leuco dye, a color developer and a sensitizer, wherein the color developer includes a compound selected from the group consisting of compounds having one of the following formulae (1), (2) and (3): methylenebis(2-naphthol); and condensation products of a polyhydric alcohol component including a polyhydric alcohol having three or more hydroxyl groups with a carboxylic acid component including a 4-hydroxybenzoic acid compound having the following formula (4): wherein m is 0 or an integer of from 1 to 2, and wherein the sensitizer includes 4-acetylbiphenyl.
Claims17
A thermosensitive recording medium comprising;
- a support;
- and
- a thermosensitive recording layer formed overlying the support and comprising a leuco dye, a color developer and a sensitizer,
- wherein the color developer comprises a compound selected from the group consisting of compounds having one of the following formulae (1), (2) and (3):
- methylenebis(2-naphthol);
- and condensation products of a polyhydric alcohol component comprising a polyhydric alcohol having three or more hydroxyl groups with a carboxylic acid component comprising a 4-hydroxybenzoic acid compound having the following formula (4):
- wherein m is 0 or an integer of from 1 to 2, and
- wherein the sensitizer comprises 4-acetylbiphenyl.
A thermosensitive recording medium comprising;
- a support;
- and
- a thermosensitive recording layer formed overlying the support and comprising a leuco dye, a color developer and a sensitizer,
- wherein the color developer comprises a compound selected from the group consisting of compounds having one of the following formulae (1), (2) and (3):
- wherein the sensitizer comprises 4-acetylbiphenyl.
A thermosensitive recording medium comprising;
- a support;
- and
- a thermosensitive recording layer formed overlying the support and comprising a leuco dye, a color developer and a sensitizer,
- wherein the color developer comprises methylenebis(2-naphthol), and
- wherein the sensitizer comprises 4-acetylbiphenyl.
A thermosensitive recording medium comprising;
- a support;
- and
- a thermosensitive recording layer formed overlying the support and comprising a leuco dye, a color developer and a sensitizer,
- wherein the color developer comprises a condensation product of a polyhydric alcohol component comprising a polyhydric alcohol having three or more hydroxyl groups with a carboxylic acid component comprising a 4-hydroxybenzoic acid compound having the following formula (4):
- wherein m is 0 or an integer of from 1 to 2, and
- wherein the sensitizer comprises 4-acetylbiphenyl.
Dependencies are inferred from the claim text.