Dye-donor element for use in thermal dye sublimation transfer

Claim 1

Dye-donor element for use according to thermal dye sublimation transfer comprising a support having thereon a dye layer containing a duplo-arylazoaniline dye which corresponds to the following formula ##STR5## wherein: R 1 represents hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted allyl group, and R 2 represents a substituted or unsubstituted alkylene group, a substituted or unsubstituted cycloalkylene group, a substituted or unsubstituted arlyene group, or R 1 and R 2 together form the necessary atoms to close a 5- or 6-membered heterocyclic ring with the nitrogen to which they are attached, or a 5- or 6-membered heterocyclic ring may be formed with R 1 and/or R 2 , the nitrogen to which they are attached and either or both carbon atoms of the phenyl ring ortho to said nitrogen atom; R 3 represents a hydroxy group, a halogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted carbonylamino group, a substituted or unsubstituted sulfonylamino group; n equals 0, 1 or 2; the R 3 substituents may be the same or different when n is 2; Ar represents a substituted or unsubstituted aryl group; R 1' , R 2' , R 3' , n' and Ar' each can have any of the significances given to R 1 , R 2 , R 3 , n and Ar respectively; X represents a linking member which can be a chemical bond, a bivalent atom, a bivalent atom group or a bivalent hydrocarbon group.