Stabilized heat-sensitive imaging material

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

1996-06-17

1997-09-30

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Having nonchromogenic liquid spread-control or...

503202, 503212, B41M 530

Patent

active

056725604

ABSTRACT:
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: ##STR1## In formula (I), Z.sub.1, Z.sub.2, and Z.sub.3 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 Z.sub.1 and Z.sub.2 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 Z.sub.1 and Z.sub.2 together do not represent a divalent alkaline earth metal ion, at least one of Z.sub.1, Z.sub.2 and Z.sub.3 represents hydrogen or an alkali metal ion.

REFERENCES:
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patent: 5296440 (1994-03-01), Kanda et al.
patent: 5424182 (1995-06-01), Marginean, Sr. et al.
patent: 5432534 (1995-07-01), Maruyama et al.
patent: 5514636 (1996-05-01), Takeuchi
patent: 5525571 (1996-06-01), Hosoi

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