EP 0756201 A1 19970129 - Method of preparing dispersions of photographically useful compounds ready-for-use in coating solutions of hydrophilic layers of photographic materials
Title (en)
Method of preparing dispersions of photographically useful compounds ready-for-use in coating solutions of hydrophilic layers of photographic materials
Title (de)
Verfahren zur Herstellung gebrauchsfertiger in Beschichtungslösungen für hydrophile Schichten photographischer Materialien verwendeter Dispersionen photographisch nützlicher Verbindungen
Title (fr)
Procédé de préparation des dispersions de composés utiles en photographie prêts à l'emploi en solutions de couchage pour de couches hydrophiles des matériaux photographiques
Publication
Application
Priority
EP 95202034 A 19950724
Abstract (en)
A method is described for preparing a concentrated dispersion of a photographically useful compound ready-for-use in coating solutions of hydrophilic colloid layers of a silver halide photographic material, wherein said compound has at least one ionisable acid site on its molecule, the said method comprising the steps of deprotonising and solubilising the said compound in alkaline medium; microprecipitating the said compound and milling the microprecipitated compound obtained, coating the said dispersion of a photographically useful compound in non-light-sensitive and/or light-sensitive hydrophilic layers of a silver halide photographic material, wherein milling proceeds during and/or after the microprecipitating step.
IPC 1-7
IPC 8 full level
G03C 7/388 (2006.01); C09K 23/00 (2022.01); G03C 1/005 (2006.01); G03C 1/83 (2006.01)
CPC (source: EP)
G03C 1/005 (2013.01); G03C 1/832 (2013.01); G03C 7/388 (2013.01); G03C 2001/7448 (2013.01)
Citation (search report)
- [XYD] EP 0586748 A1 19940316 - AGFA GEVAERT NV [BE]
- [DYL] EP 0549489 A1 19930630 - EASTMAN KODAK CO [US]
- [Y] EP 0351593 A2 19900124 - EASTMAN KODAK CO [US]
- [Y] EP 0460616 A1 19911211 - FUJI PHOTO FILM CO LTD [JP]
- [Y] EP 0433172 A2 19910619 - CANON KK [JP]
- [A] AU 437882 A
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0756201 A1 19970129; JP 2835711 B2 19981214; JP H09146221 A 19970606
DOCDB simple family (application)
EP 96202056 A 19960719; JP 20886596 A 19960719