Claims
- 1. A thermosensitive recording material comprising a support and, provided thereon, a thermosensitive recording layer containing a generally colorless or slightly colored dye precursor and a developer which, upon being heated, reacts with said dye precursor to develop color, wherein said thermosensitive recording layer contains as sensitizer a compound selected from a group consisting of p-benzylbiphenyl, diaryl esters of adipic acid, ##STR11## (wherein R.sub.1 and R.sub.2 each represents an alkyl, aralkyl, or aryl group), and ##STR12## and said developer is bis(3-allyl-4-hydroxyphenyl(sulfone or combination of bis(3-allyl-4-hydroxyphenyl)sulfone and 3-allyl-4,4'-dihydroxydiphenylsulfone.
- 2. A thermosensitive recording material according to claim 1, wherein the sensitizer is diphenyl adipate, bis(o-chlorophenyl) adipate, bis(p-chlorophenyl) adipate, or bis(p-methylphenyl) adipate.
- 3. A thermosensitive recording material according to claim 1, wherein the sensitizer is a compound represented by the formula ##STR13## and is diphenyl phthalate, dibenzyl isophthalate, dimethyl terephthalate, or dibenzyl terephthalate.
- 4. A thermosensitive recording material according to claim 1 wherein the sensitizer is p-benzylbiphenyl.
- 5. The thermosensitive recording material according to claim 1, wherein the dye precursor is 3-diethylamino-6-methyl-7-anilinofluorane.
- 6. The thermosensitive recording material according to claim 1, wherein the dye precursor is a fluorene compound represented by the general formula ##STR14## wherein R.sub.1, R.sub.2, R.sub.3 R.sub.4, R.sub.5 and R.sub.6 represent each a lower alkyl group.
- 7. The thermosensitive recording material according to claim 6, wherein the dye precursor is 3,6-bis(dimethylamino)fluorene-9-spiro-3'-(6'dimethylaminophthalide).
- 8. The thermosensitive recording material according to claim 1, wherein the proportion of the sensitizer to the developer is in the range of from 10 to 200% by weight.
- 9. The thermosensitive recording material according to claim 8, wherein the proportion of the sensitizer to the developer is in the range of from 20 to 140% by weight.
- 10. The thermosensitive recording material according to claim 1, wherein the proportion of the sensitizer to the dye is in the range of from 20 to 500% by weight.
- 11. The thermosensitive recording material according to claim 1, wherein a protective layer is provided over the thermosensitive recording layer.
- 12. A thermosensitive recording label comprising the thermosensitive recording material according to claim 11 and an adhesive layer provided on the back side of the support.
- 13. The thermosensitive recording material according to claim 11, wherein the dye precursor is a fluorene compound represented by the general formula: ##STR15## wherein R.sub.1, R.sub.2, R.sub.3 R.sub.4, R.sub.5 and R.sub.6 represent each a lower alkyl group.
- 14. A method of thermosensitive recording which comprises heating the thermosensitive recording material according to claim 1.
Priority Claims (6)
Number |
Date |
Country |
Kind |
60-15385 |
Jan 1985 |
JPX |
|
60-43192 |
Mar 1985 |
JPX |
|
60-43193 |
Mar 1985 |
JPX |
|
60-43194 |
Mar 1985 |
JPX |
|
60-43195 |
Mar 1985 |
JPX |
|
60-069691 |
Apr 1985 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 822,590, filed Jan. 27, 1986 U.S. Patent 4,742,042.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4672401 |
Yamada et al. |
Jun 1987 |
|
4764500 |
Araki et al. |
Aug 1988 |
|
Divisions (1)
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Number |
Date |
Country |
Parent |
822590 |
Jan 1986 |
|