Mixture of dyes for black dye donor for thermal color proofing

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

G - Physics

03

F

G03F 3/10 (2006.01)

Patent

CA 2054561

-46- MIXTURE OF DYES FOR CYAN DYE DONOR FOR THERMAL COLOR PROOFING Abstract of the Disclosure A black dye-donor element for thermal dye transfer comprising a support having thereon a dye layer comprising a mixture of at least one cyan, magenta and yellow dyes dispersed in a polymeric binder, at least one of the cyan dyes having the formula: I Image wherein: R1 and R2 each independently represents hydrogen; a substituted or unsubstituted alkyl group having from 1 to about 10 carbon atoms; a substituted or unsubstituted cycloalkyl group having from about 5 to about 7 carbon atoms or a substituted or unsubstituted allyl group; with the proviso that R1 and R2 cannot both be hydrogen; 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 an 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, -47- 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 O to 4; R4 represents hydrogen or an electron withdrawing group; R5 represents an electron withdrawing group, 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 yellow dyes having the formula: II Image wherein: R8, R9 and R11 each independently represents a substituted or unsubstituted alkyl group of from 1 to about 10 carbon atoms; a cycloalkyl group of from about 5 to about 7 carbon atoms; a substituted or unsubstituted allyl group; or an aryl group having from about 6 to about 10 carbon atoms; -48- or R8 and R9 can be joined together to form, along with the nitrogen to which they are attached, a 5-or 6-membered heterocyclic ring; or either or both of R8 and R9 can be joined to the carbon atom of the benzene ring at a position ortho to the position of attachment of the anilino nitrogen to form a 5- or 6-membered ring, thus forming a polycyclic system; R10 represents hydrogen; a substituted or unsubstituted alkyl group of from 1 to about 10 carbon atoms; a cycloalkyl group of from about 5 to about 7 carbon atoms; a substituted or unsubstituted allyl group; carbamoyl; or alkoxycarbonyl; R12 represents a substituted or unsubstituted alkoxy group having from 1 to about 10 carbon atoms; a substituted or unsubstituted aryloxy group having from about 6 to about 10 carbon atoms; NHR13; NR13R14 or the atoms necessary to complete a 6-membered ring fused to the benzene ring; R13 and R14 each independently represents any of the groups for R8; or R13 and R14 may be joined together to form, along with the nitrogen to which they are attached, a 5-or 6-membered heterocyclic ring; n is a positive integer from 1 to 5; and G represents a substituted or unsubstituted alkyl or alkoxy group of from 1 to about 10 carbon atoms; halogen; aryloxy; or represents the atoms necessary to complete a 5- or 6-membered ring, thus forming a fused ring system; and at least one of the magenta dyes having the formula: -49- III Image wherein: R15 is a substituted or unsubstituted alkyl or allyl group of from 1 to about 10 carbon atoms; X is an alkoxy group of from 1 to about 4 carbon atoms or represents the atoms which when taken together with R16 forms a 5- or 6- membered ring; R16 is any of the groups for R15 or represents the atoms which when taken together with X forms a 5- or 6-membered ring; Y is R15, an alkoxy group of from 1 to about 4 carbon atoms, hydrogen, halogen, or NHJR17; R17 is a substituted or unsubstituted alkyl group of from 1 to about 10 carbon atoms, or a substituted or unsubstituted aryl group of from about 6 to about 10 carbon atoms; J is CO, CO2, -SO2- or CONR20-; R18 is a substituted or unsubstituted alkyl or allyl group of from 1 to about 10 carbon atoms, or a substituted or unsubstituted aryl group of from about 6 to about 10 carbon atoms; R19 is hydrogen, cyano, a substituted or unsubstituted alkyl group of from 1 to about 10 carbon atoms, or a substituted or unsubstituted aryl group of from about 6 to about 10 carbon atoms; and -50- R20 is hydrogen or R18.

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