Global Patent Index - EP 1186949 A1

EP 1186949 A1 20020313 - Photothermographic materials

Title (en)

Photothermographic materials

Title (de)

Photothermographische Materialien

Title (fr)

Matériaux photothermographiques


EP 1186949 A1 20020313 (EN)


EP 01000386 A 20010817


  • EP 01000386 A 20010817
  • EP 00203136 A 20000911

Abstract (en)

A process for producing an aqueous dispersion comprising: preparing a dispersion of photosensitive silver halide and a binder or a surfactant in an aqueous medium; and subsequently either (a) adding a first silver salt to the silver halide dispersion and then adding a second silver salt; or (b) adding the second silver salt to the silver halide dispersion and then adding the first silver salt, wherein the aqueous dispersion is substantially free of a water-soluble metal or ammonium salt of an aliphatic carboxylic acid with greater than 12 carbon atoms, the first silver salt is a substantially light-insensitive and substantially water-insoluble silver salt of an organic carboxylic acid, and the second silver salt has a water-solubility greater than 0.1 g in 1 L of water at 20 DEG C; an aqueous dispersion obtainable therewith; a photothermographic recording material prepared with the aqueous dispersion; and a process for preparing the photothermographic recording material. In addition the use of the second silver salt for increasing the sensitivity of a photothermographic recording material is provided.

IPC 1-7

G03C 1/498

IPC 8 full level

G03C 1/498 (2006.01)

CPC (source: EP)

G03C 1/49845 (2013.01)

Citation (search report)

Designated contracting state (EPC)


DOCDB simple family (publication)

EP 1186949 A1 20020313; EP 1186949 B1 20061025

DOCDB simple family (application)

EP 01000386 A 20010817