Mixture of dyes for cyan dye donor for thermal color proofing

Details Mixture of dyes for cyan dye donor for thermal color proofing Mixture of dyes for cyan dye donor for thermal color proofing

G - Physics

03

F

G03F 3/10 (2006.01) B41M 5/035 (2006.01) B41M 5/26 (2006.01)

Patent

CA 2053529

MIXTURE OF DYES FOR CYAN DYE DONOR FOR THERMAL COLOR PROOFING Abstract of the Disclosure A cyan dye-donor element for thermal dye transfer comprising a support having thereon a dye layer comprising a mixture of cyan dyes dispersed in a polymeric binder, at least one of the cyan dyes having the formula: Image wherein: R1 and R2 each independently represents hydrogen; a substituted or unsubstituted alkyl group having from 1 to about 6 carbon atoms; a substituted or unsubstituted cycloalkyl group having from about 5 to about 7 carbon atoms or a substituted or unsubstituted allyl group; or R1 and R2 can be joined together to form, along with the nitrogen to which they are attached, a 5- to 7-membered heterocyclic ring; or either or both of R1 and R2 can be combined with R3 to form a 5- to 7-membered heterocyclic ring; each R3 independently represents substituted or unsubstituted alkyl, cycloalkyl or allyl as described above for R1 and R2, alkoxy, aryloxy, halogen, thiocyano, acylamido, ureido, alkylsulfonamido, arylsulfonamido, alkylthio, arylthio or trifluoromethyl; or any two of R3 may be combined together to form a 5- or 6-membered carbocyclic or heterocyclic ring; or one or two of R3 may be combined with either or both of R1 and R2 to complete a 5- to 7-membered ring; m is an integer of from 0 to 4; R4 represents an electron withdrawing group; R5 represents a substituted or unsubstituted aryl group having from about 6 to about 10 carbon atoms or a substituted or unsubstituted hetaryl group having from about 5 to about 10 atoms; R6 and R7 each independently represents an electron withdrawing group; and R6 and R7 may be combined to form the residue of an active methylene compound and at least one of the other of the dyes having the formula: II Image wherein: R1, R2, R3 and m represent the same as above; X represents hydrogen, halogen or may be combined together with Y to represent the atoms necessary to complete a 6-membered aromatic ring; with the proviso that when X is hydrogen, then J represents NHCOR8, where RF represents a perfluorinated alkyl or aryl group; and with the further proviso that when X is halogen, then J represents NHCOR8, NHC02R8, NHCONHR8 or NHSO2R8; and with the further proviso that when X is combined with Y, then J represents CONHR8, SO2NHR8, CN, SO2R8 or SCN, in which case, however, R8 cannot be hydrogen; R8 is the same as R1 and R5 as described above; and Y is R1, R5, acylamino or may be combined together with X as described above.

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