Merocyanine dye-donor element used in thermal dye transfer

Details Merocyanine dye-donor element used in thermal dye transfer Merocyanine dye-donor element used in thermal dye transfer

B - Operations, Transporting

41

M

42/5

B41M 5/26 (2006.01) B41M 5/52 (2006.01)

Patent

CA 1268942

MEROCYANINE DYE-DONOR ELEMENT USED IN THERMAL DYE TRANSFER Abstract A dye-donor element for thermal dye transfer comprises a support having thereon a merocyanine dye dispersed in a polymeric binder, the merocyanine dye being capable of transfer by diffusion to a dye-receiving element upon the application of heat and being incapable of ~ubstantial photolysis, the merocyanine dye being substituted or unsubstituted on the bridging methine carbon atoms. In a preferred embodiment, the merocyanine dye has the formula: Image wherein: A represents -COR, -COOR, -CONHR, -CN, -SO2R or -SO2NR2; or A may be combined together with R1 to form a heterocyclic or carbocyclic ring system; R1 represents -NHR, -NR2, -OR, -SR, or -R; n represents 0 or 1; Z represents the atoms necessary to complete a 5- or 6-membered substituted or unsubstituted heterocyclic ring; and each R independently represents a substituted or unsubstituted alkyl group of from 1 to about 6 carbon atoms or a substituted or unsubstituted aryl group of from about 6 to about 10 carbon atoms.

543131

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