Patent CA-2054561-A1 (CA)
Title: Mixture of dyes for black dye donor for thermal color proofing
Inventor: CHAPMAN DEREK D
IPC: B41M5/385
Filed: 1991-10-30
Abstract: 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              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, 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             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;     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:     III                    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 R20 is hydrogen or R18.