N-alkyl-or n-aryl-aminopyrazolone merocyanine dye-donor element

Details N-alkyl-or n-aryl-aminopyrazolone merocyanine dye-donor element N-alkyl-or n-aryl-aminopyrazolone merocyanine dye-donor element

1987-06-08

1988-05-10

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having plural interactive leaves

8471, 427256, 428195, 428207, 428480, 428913, 428914, B41M 526

Patent

active

047435828

ABSTRACT:
A dye-donor element for thermal dye transfer comprises a support having thereon a 3-(N-alkyl- or N-aryl-amino)-2-pyrazolin-5-one 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 substantial photolysis, the merocyanine dye being substituted or unsubstituted on the bridging methine carbon atoms.
In a preferred embodiment, the merocyanine dye has the formula: ##STR1## wherein: R 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;

REFERENCES:
patent: 3933914 (1976-01-01), Coles et al.

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