Yellow dye mixture for thermal color proofing

Details Yellow dye mixture for thermal color proofing Yellow dye mixture 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 2055383

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: I Image wherein: Rl is a substituted or unsubstituted alkyl group of from 1 to about 10 carbon atoms; a substituted or unsubstituted cycloalkyl group of from about 5 to about 7 carbon atoms; an allyl group; a substituted or unsubstituted aryl group; or a substituted or unsubstituted hetaryl group of from about 5 to about 10 atoms; 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 Rl; alkoxy, halogen; aryloxy; or represents the atoms which when taken together with R2 forms a 5- or 6-membered ring; each Y independently represents any of the groups for Rl; alkoxy of from 1 to about 10 carbon atoms; halogen; or two adjacent Y's together represent 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: I I Image wherein: R3 represents the same groups as above; R4 and R5 each independently represents hydrogen, R3; cyano; acyloxy; alkoxy of 1 to about 6 carbon atoms; halogen; or alkoxycarbonyl; or any two of R3, R4 and R5 together represent the atoms necessary to complete a 5- to 7-membered ring; R6 represents the same groups as R3; G represents a substituted or unsubstituted alkyl, cycloalkyl or allyl group as described above for R3, NR7R8 or OR9; R7 and R8 each independently represents hydrogen, acyl or R3, with the proviso that R7 and R8 cannot both be hydrogen at the same time; or R7 and R8 together represent the atoms necessary to complete a 5- to 7- membered ring; R9 represents the same groups as R3; X represents C(R10)(Rll), S, O or NR10; R10 and Rll each independently represents the same groups as R3; or R10 and Rll together represent the atoms necessary to complete a 5- to 7- membered ring; and J represents the atoms necessary to complete a 5- or 6-membered ring which may be fused to another ring system.

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