COMPOSITE FINE GRAINS CONTAINING WATER DISPERSIBLE ORGANIC SILVER SALT AND ITS PRODUCTION, COMPOSITE FINE GRAINS CONTAINING WATER DISPERSIBLE REDUCING AGENT AND ITS PRODUCTION, AND SILVER HALIDE PHOTOSENSITIVE MATERIAL FOR HEAT DEVELOPING

摘要

PROBLEM TO BE SOLVED: To obtain the subject composite fine grains useful for production of silver halide photosensitive material for heat developing, low in photographic fog even produced by using an aqueous coating agent and stored in an atmosphere having high humidity by forming the composite fine grains containing a specific silver source or a reducing agent in an aqueous liquid. ;SOLUTION: This composite fine grains including water dispersible organic silver salt are obtained by forming composite fine grains by polymerizing (B) a polymerizable monomer in an aqueous solution including (A) an organic silver salt. The preferable ratio of the component A and B is 0.5-10 pts.wt of the component B per 1 pts. of the component A. The component B preferably satisfies log P≥2.0 and includes a crosslinkable monomer. The preferable glass transition pint of the polymer of the composite fine grains is room temperature-120°C, especially 40-100°C. The composite fine grains including a water dispersible reducing agent are obtained by including the reducing agent in a resin and then forming the fine grains in an aqueous liquid.;COPYRIGHT: (C)2001,JPO