Coating compositions
AssigneeJ. M. Eltzroth & Associates, Inc.
InventorRussell C. Miller
Life of this patent
Estimating the term…
Abstract
A process is provided for preparing a hexavalent chromium containing emulsion coating composition without causing coagulation of the emulsion and for providing an emulsion coating composition containing at least one water insoluble particulate film-forming thermoplastic resin which is highly effective as a coating for a metal substrate to give new and improved results in the preparation of resin coated metals, particularly steel, aluminum, magnesium, and zinc surfaced articles including galvanized iron or steel.
Claims12
A process of preparing a hexavalent chromium containing emulsion coating composition containing in the discontinuous phase at least one water insoluble particulate film forming thermoplastic resin reactive with hexavalent chromium to cause coagulation of said emulsion, and water in the continuous phase, wich comprises agitating a body of said emulsion and gradually adding to said body a dilute aqueous solution of an inorganic ionizable water soluble hexavalent chromium compound having a concentration of 1% to 10% by weight, calculated as Cr, while cooling and maintaining a pH within the range of 2 to 10.5 and maintaining said body in a non-foaming state.
Dependencies are inferred from the claim text.