Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1980-05-08
1981-08-18
Downey, Mary F.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430377, 430493, 430512, 430546, 430559, 430566, 430569, 430627, 430628, 430629, 430631, 430636, 430637, 430541, 430544, 430570, 430606, 430607, G03C 110, G03C 106
Patent
active
042847095
ABSTRACT:
A process for incorporating photographic additives which are sparingly soluble to insoluble in water into a free-flowing, aqueous preparation which contains a hydrophilic colloid and is used to prepare photographic layers, by mixing the photographic additives with a combination of at least one non-ionic alkylphenol/alkylene oxide or diphenolmethane/alkylene oxide adduct and at least one anionic esterification product of these adducts and, optionally, a water-immiscible solvent and then finely dispersing this mixture in an aqueous solution of the hydrophilic colloid, which solution contains further water-soluble or dispersed water-insoluble constituents optionally.
Spontaneous emulsions of the photographic additives with good fine dispersion are obtained in this way without high expenditure of mechanical energy. The emulsions are suitable for the preparation of photographic layers, which are used in photographic materials with improved characteristics.
REFERENCES:
patent: 3525620 (1970-08-01), Nishio
patent: 3644119 (1972-02-01), Jones
patent: 3895950 (1975-07-01), Geiger
patent: 4198478 (1980-04-01), Yoneyama
Ciba-Geigy Aktiengesellschaft
Downey Mary F.
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