Thermographic recording material with improved image tone

US6686313B2 · kind B2 · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Carlo Uyttendaele · Berchem, BE
• Rene De Keyzer · Bornem, BE
• Johan Loccufier · Zwijnaarde, BE
• Ivan Hoogmartens · Wilrijk, BE

Key dates

• Filing date: Nov 28, 2001
• Grant date: Feb 3, 2004
• Expiry date: Feb 10, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C1/4989
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A monosheet black and white substantially light-insensitive thermographic recording material comprising a thermosensitive element and a support, the thermosensitive element containing a substantially light-insensitive organic silver salt and an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the thermographic recording material comprises a reaction product of an amino-group containing polymer and a compound according to formula (I): wherein each of R1, R2, R3 and R4 is independently hydrogen or an optionally substituted alkyl, aryl, heteroaryl, alkoxy or aryloxy group; L is a divalent linking group selected from the group consisting of oxygen and optionally substituted alkyl, aryl, heteroaryl, alkenyl and alkynyl groups; and m is either 0 or 1; and n is either 0 or 1; and a preparation process therefor.