Thermographic recording material with improved image density and

Details Thermographic recording material with improved image density and Thermographic recording material with improved image density and

1998-11-25

2000-03-14

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430203, 430600, 430601, 430610, 430619, G03C 1498

Patent

active

060371145

ABSTRACT:
A recording material exclusive of a thermal bleachable dye comprising a support and a thermosensitive element comprising an organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the recording material further contains non-halide-ion-containing arylonium compound exclusive of compounds according to formula (I): ##STR1## wherein L.sub.a is a valence bond or a divalent or trivalent linking group, L.sub.2 is an alkylene group, each of R.sub.a and R.sub.b is a hydrogen atom or monovalent substituent group, M.sub.1 is an onium ion, R.sub.a and R.sub.b may form a ring taken together and D is an electron donative group of atoms, with the proviso that where D is a hydrazino group which is not a part of a semicarbazido group, no oxo group is substituted to the carbon atom which is directly attached to a nitrogen atom of the hydrazine; and a recording process therefor.

REFERENCES:
patent: 5395747 (1995-03-01), Helland et al.
patent: 5656419 (1997-08-01), Toya et al.
patent: 5714311 (1998-02-01), Cowdery-Corvan et al.

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