The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 17, 1994
Filed:
May. 14, 1992
Masaki Nishimura, Tokyo, JP;
Kunitaka Toyofuku, Sakura, JP;
Oji Paper Co., Ltd., Tokyo, JP;
Abstract
A thermosensitive recording material having a high whiteness and capable of forming thereon colored images having an excellent oil and plasticizer resistance and persistency over a long time, comprises a thermosensitive colored image forming layer formed on a sheet substrate and comprising, together with a dye precursor and a binder, a color-developing agent comprising at least one compound of the formulae (I) to (VIII). ##STR1## wherein R.sub.1 =H, alkyl, aryl, aralkyl, alkenyl or cycloalkyl, R.sub.2 and R.sub.3 =H, alkyl, aryl aralkyl, alkenyl or acetyl, or are fuse-bonded to form a cyclic structure, R.sub.4 =alkyl, aryl, aralkyl, alkenyl, piperidino, succinimide, .rho.-benzylphenyl, etc., R.sub.5 and R.sub.6 =H, alkyl, aryl, aralkyl, alkenyl cycloalkyl, etc., or are fuse-bonded to form ##STR2## R.sub.7, R.sub.9, and R.sub.11 =unsubstituted or substituted aromatic groups with alkyl, alkoxyl, acyl, etc., R.sub.8, R.sub.10 and R.sub.12 =unsubstituted or substituted alkyl, aryl, aralkyl or alkenyl with alkyl, alkoxyl, acyl, nitro or halogen, and R.sub.13 =H or unsubstituted or substituted alkyl, aryl aralkyl or alkenyl with alkyl, alkoxyl, acyl, nitro or halogen.