Thermal transfer sheet

Details Thermal transfer sheet Thermal transfer sheet

1992-02-27

1993-11-09

Hess, B. Hamilton

Record receiver having plural interactive leaves or a colorless

Having plural interactive leaves

428195, 428913, 428914, B41M 5035, B41M 538

Patent

active

052602575

ABSTRACT:
A thermal transfer sheet including a substrate sheet and a dye supporting layer formed on one surface of said substrate sheet, characterized in that the dye contained in said dye supporting layer is represented by the following general formula ##STR1## wherein R.sub.1 stands for a substituted or unsubstituted alkyl group, cycloalkyl group, aralkyl group or aryl group or an atom or atom group which combines with X to form a five- or six-membered ring; R.sub.2 stands for a substituted or unsubstituted alkyl group, a cycloalkyl group, an aralkyl group or an aryl group, provided that R.sub.1 and R.sub.2 may combine with each other to form a five- or six-membered ring which may have an oxygen or nitrogen atom; R.sub.3 stands for a hydrogen atom, a halogen atom, a cyano group, a substituted or unsubstituted alkyl group, cycloalkyl group, alkoxy group, aralkyl group, aryl group, acyl group, acylamino group, sulfonylamino group, ureido group, carbamoyl group, sulfamoyl group or amino group; R.sub.4 stands for a substituted or unsubstituted three- to five-membered cycloalkyl group or thienyl group bonded at the .beta.-position, or a substituted or unsubstituted five- or six-membered cycloalkenyl group, or a group represented by the following formula ##STR2## R.sub.5 and R.sub.6 which may be the same or different stand for a hydrogen atom, a halogen atom, a substituted or unsubstituted alkyl group, alkoxy group, acylamino group, sulfonylamino group or ureido group; X stands for a hydrogen atom or an atom or atom group which combines with R.sub.1 to form a five- or six-membered ring; n is 1 or 2; R.sub.7 and R.sub.8 stand for a hydrogen atom, a halogen atom or a lower alkyl group; Z stand for CH.sub.2, O, S or NR.sub.9 ; and R.sub.9 stands for a hydrogen atom or a lower alkyl group.

REFERENCES:
patent: 4990484 (1991-02-01), Nakamura

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