Stabilizers for use in substantially light-insensitive...

Details Stabilizers for use in substantially light-insensitive... Stabilizers for use in substantially light-insensitive...

2006-08-29

2006-08-29

Schilling, Richard L. (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

C430S618000, C430S620000, C430S964000, C430S965000

Reexamination Certificate

active

07097961

ABSTRACT:
A substantially light-insensitive black and white monosheet thermographic recording material comprising a support and a thermosensitive element, said thermosensitive element containing a substantially light-insensitive organic silver salt, an organic reducing agent therefor in thermal working relationship therewith, at least one binder and at least one stabilizer represented by formula (I):wherein R1, R2, R3and R4are independently selected from the group consisting of a hydrogen atom, halogen atoms and aliphatic, alkoxy, nitro, acyl, sulfonyl, nitrile, alkaryl, aryl, amino, thioalkyl, aldehyde, urea, —O—(C═O)-alkyl, —O—(C═O)-aryl, —O—(C═O)—O-alkyl, —O—(C═O)—O-aryl, —NH—(C═O)-alkyl, —NH—(C═O)-aryl, —(C═O)—NH-alkyl, —(C═O)—NH-aryl, —NH—(SO2)-alkyl, —NH—(SO2)-aryl, —(SO2)—NH-alkyl, —(SO2)—NH-aryl groups; X is represented by -A(-M)nor is selected from the group consisting of substituted aliphatic groups, unsubstituted aliphatic groups, substituted cycloaliphatic groups, unsubstituted cycloaliphatic groups, substituted aromatic groups and unsubstituted aromatic groups where in each of said groups one or more of the chain or ring carbon atoms may be substituted by one of more atoms selected from the group consisting of S, O, Si, N and P atoms; n is 2, 3 or 4; A is selected from the group consisting of substituted aliphatic groups, unsubstituted aliphatic groups, substituted cycloaliphatic groups, unsubstituted cycloaliphatic groups, substituted aromatic groups and unsubstituted aromatic groups where in each of said groups one or more of the chain or ring carbon atoms may be substituted by one of more atoms selected from the group consisting of S, O, Si, N and P atoms; each (-M) is independently a substituted or unsubstituted group selected from the group consisting of -(2-S-imidazole) groups and -(2-S-imidazole) groups annelated with an aromatic ring system, the optional substituents for -M being selected from the group consisting of halogen atoms and aliphatic, alkoxy, nitro, acyl, sulfonyl, nitrile, alkaryl and aryl groups.

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