Yellow dye mixture for thermal color proofing

Details Yellow dye mixture for thermal color proofing Yellow dye mixture for thermal color proofing

B - Operations, Transporting

41

M

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

Patent

CA 2052843

YELLOW DYE MIXTURE FOR THERMAL COLOR PROOFING Abstract of the disclosure A yellow dye donor element for thermal dye transfer comprises a support having thereon a dye layer comprising a mixture of yellow dyes dispersed in a polymeric binder, at least one of the yellow dyes having the formula: Image wherein: R1 is 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; or a substituted or unsubstituted allyl group; R2 is any of the groups for R1 or represents the atoms which when taken together with Z form a 5- or 6-membered ring; z is hydrogen; any of the groups for R1; alkoxy; halogen; aryloxy; or represents the atoms which when taken together with R2 forms a 5- or 6-membered ring; Y is any of the groups for R1; alkoxy of from 1 to about 10 carbon atoms; halogen; or represents the atoms necessary to complete a 5- or 6-membered ring, thus forming a fused ring system; and n is a positive integer from 1 to 3; and at least one of the other of the dyes having the formula: Image II wherein: R6 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; R7 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; NHR8; NR8R9 or the atoms necessary to complete a 6-membered ring fused to the benzene ring; R3 and R4 each represents any of the groups for R6; or R3 and R4 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 R3 and R4 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; R5 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; R8 and R9 each independently represents any of the groups for R6; or R8 and R9 may be joined together to form, along with the nitrogen to which they are attached, a 5-or 6-membered heterocyclic ring; m is a positive integer from 1 to 3; 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. In a preferred embodiment of the invention, a third yellow dye is employed having the formula: ¦¦¦ Image wherein: R10 represents OR13 or NHR13; R11 represents any of the groups for R3; R12 represents any of the groups for R4; R13 represents any of the groups for R6; J represents any of the groups for G; and p is a positive integer from 1 to 3. This application is a continuation-in-part of copending U.S. Serial No. 606,399, filed October 31, 1990.

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