Title:
HEAT DEVELOPING PHOTOGRAPHIC MATERIAL
Document Type and Number:
Japanese Patent JP3506278
Kind Code:
B2
Abstract:
PURPOSE: To provide a heat developing photographic material whose activity is high and which can be developed at a low temperature and is excellent in preservation stability by using specific bisguanidine as organic silver salt, and setting a melting point or a decomposition point of a base precursor and slubility to water in a specific range.
CONSTITUTION: An organic base constituting a base precursor is bisguanidine by connecting two partial structures corresponding to an atomic group by removing a hydrogen atom by a single piece or two pieces from guanidine expressed by a formula. A melting point or a decomposition point of a base precursor is not more than 11°C, and solubility to water of 25°C is not more than 1%. In the formula, R1, R2, R3, R4 and R5 are respectively independently a hydrogen atom, an alkyl group and an aryl group, and the respective groups may have substitutional groups not less than one. Optional two groups selected from R1, R2, R3, R4, and R5 are bonded to each other, and may form a five or six- membered nitrogen containing heterocycle.
Inventors:
Shunichi Ishikawa
Jiro Tsukahara
Hideaki Sato
Kiyoshi Takeuchi
Jiro Tsukahara
Hideaki Sato
Kiyoshi Takeuchi
Application Number:
JP29193794A
Publication Date:
March 15, 2004
Filing Date:
November 02, 1994
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
G03C8/40; G03C1/498; (IPC1-7): G03C1/498; G03C8/40
Domestic Patent References:
| JP1257942A | ||||
| JP6468746A | ||||
| JP418558A | ||||
| JP8169870A | ||||
| JP61116585A |
Attorney, Agent or Firm:
Shohei Oguri (8 outside)
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