Toning agents for use in substantially light-insensitive recording materials
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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May 16, 2006
Grant Date -
Jul 8, 2004
app pub date -
Dec 18, 2003
filing date -
Dec 19, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A black and white monosheet substantially light-insensitive thermographic recording material comprising a support and a thermosensitive element, the thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, a binder and at least one toning agent, wherein the at least one toning agent is selected from compounds represented by formula (I): ##STR00001## wherein R.sup.1 is an alkyl group optionally substituted with a hydroxy, carboxy, carboxy ester, acyl or carbonato group; X is S, O or N--R.sup.6; R.sup.6 is an optionally substituted alkyl group; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 independently represent a hydrogen atom, a halogen atom or an alkyl, an alkoxy, a thio-alkoxy, a nitro, a cyano, a carboxy, a carboxy ester, an acyl, an aldehyde, an acylamido, a sulphonamido, an acylamino, a carbonato, a hydroxy or an aryl group or at least one of R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 and R.sup.4 and R.sup.5 independently represent the atoms necessary to form a carbocyclic or heterocyclic group or at least one of R.sup.1 and R.sup.5 and R.sup.2 and R.sup.6 independently represent the atoms necessary to form a heterocyclic ring; and compounds represented by formula (II): ##STR00002## wherein R.sup.7 is an optionally substituted alkyl group; Y is S, O or N--R.sup.10; R.sup.10 is an optionally substituted alkyl group; R.sup.8 and R.sup.9 independently represent a hydrogen atom, a halogen atom or an alkyl, an alkoxy, a thio-alkoxy, a nitro, a cyano, a carboxy, a carboxy ester, an acyl, an aldehyde, an acylamido, a sulphonamido, an acylamino, a carbonato, a hydroxy or an aryl group or R.sup.8 and R.sup.9 represent the atoms necessary to form a heterocyclic or a non-aromatic carbocyclic ring or at least one of R.sup.8 and R.sup.10 and R.sup.9 and R.sup.7 independently represent the atoms necessary to form a heterocyclic ring; and both R.sup.8 and R.sup.9 cannot both be an alkyl group.
First Claim
Other Claims data not available
