Stabilized heat-sensitive imaging material

Details Stabilized heat-sensitive imaging material Stabilized heat-sensitive imaging material

B - Operations, Transporting

41

M

B41M 5/32 (2006.01) G03C 1/498 (2006.01)

Patent

CA 2207982

The present invention is directed to a heat- sensitive imaging material that comprises a support on which is formed a heat-sensitive imaging layer. This imaging layer comprises a color-forming amount of a substantially colorless, finally divided noble metal salt of an organic acid, an organic reducing agent that is capable of a color-forming reaction with the noble metal salt under heating conditions to produce a colored image, and a stabilizer compound of formula (I) that mitigates the formation of non-imaging background color in the imaging layer: Image In formula (I), Z1, Z2, and Z3 each independently represents hydrogen, an alkali metal ion, an alkyl group comprising 1 to about 8 carbon atoms, an aralkyl or cycloalkyl group comprising 5 to about 10 carbon atoms, or an aryl group comprising 6 to about 15 carbon atoms; or Z1 and Z2 together represent a divalent alkaline earth metal ion, a divalent alkylene group comprising 2 to about 8 carbon atoms, or a divalent aryl group comprising 6 to about 30 carbon atoms; with the proviso that, when Z1 and Z2 together do not represent a divalent alkaline earth metal ion, at least one of Z1, Z2 and Z3 represents hydrogen or an alkali metal ion.

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