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:
Dec. 31, 1991
Filed:
Dec. 15, 1989
Yoshiaki Hayashi, Osaka, JP;
Taira Fujita, Osaka, JP;
Takehiro Kusumoto, Hyogo, JP;
Takeshi Hioki, Osaka, JP;
Sumitomo Chemical Company, Ltd., Osaka, JP;
Abstract
A cyan dye-donor element which gives good printed images to a thermal-transfer sheet and a thermal-transfer sheet comprising a substrate sheet and a layer containing said cyan dye-donor and being laid on one side of the substrate sheet are provided. The cyan dye-donor element comprises cyan dyes dispersed or dissolved in a polymeric binder wherein said cyan dyes comprise: ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group; at least one dye represented by the following formula (II): ##STR2## wherein R.sub.3 and R.sub.4 each represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group which may be substituted, and R.sub.5 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group; and at least one dye selected from the group consisting of dyes represented by the following formula (III): ##STR3## wherein R.sub.6 and R.sub.7 each represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group which may be substituted, R.sub.8 represents a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group which may be substituted, an alkoxy group which may be substituted or an acylamino group which may be substituted and R.sub.9 represents a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group which may be substituted or an aryl group which may be substituted, dyes represented by the following formula (IV): ##STR4## wherein R.sub.10 represents a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group which may be substituted, an aryl group which may be substituted or a cyclohexyl group, R.sub.11 -R.sub.13 each represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group which may be substituted, and R.sub.14 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group which may be substituted or an alkoxy group which may be substituted, and dyes represented by the following formula (V): ##STR5## wherein R.sub.15 and R.sub.16 each represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group which may be substituted.