Back to results
US 4,379,836 AGranted
Process for the production of dispersions and photographic materials
AssigneeAgfa-Gevaert
InventorsHildegard Schnoring, Karl-Wilhelm Schranz, Gunther Koepke
Life of this patent
Estimating the term…
Abstract
Process for the production of photographic emulsions consisting of water-immiscible or water-insoluble organic substances and an aqueous solution of an organic binder, characterized in that the hydrophilic and hydrophobic phases are heated separately, each to its particular temperature above its liquefaction point, and then continuously dosed into a dispersing chamber.
Claims11
In the process for the production of a dispersion of at least one liquid organic phase containing a hydrophobic, photographically-active substance,
- and at least one aqueous phase containing a binder,
- by combining the phases by dispersion in a dispersion unit, separately introducing said organic phase and said aqueous into the dispersion and simultaneously,
- and combining said phases in said unit at a temperature maintained at 100.degree. C. or higher and under a pressure maintained at least 1 bar.
Dependencies are inferred from the claim text.