Abstract: A process for coating a substrate and a coated substrate are disclosed. In a typical embodiment of the invention, a coating composition containing a capped polyisocyanate is first deposited on the substrate followed by applying, before curing the first composition, a second coating composition containing 1,2-epoxy functionality. This method of coating is referred to as wet-on-wet coating. The coated substrate is then heated in one step to cure the multilayered coating.

Abstract: A method is described for preparation of an adduct product for use as a binder medium for paints to be applied by electrodeposition. This product is the adduct resulting from the solution of a solid polycycloalkadiene polymer having a molecular weight of 700-800 in a liquid polyalkadiene polymer of 500-5000 molecular weight after the initiation of the adduct formation reaction by the addition of an unsaturated polycarboxylic acid or its anhydride. The adduct is formed by adding the acid or anhydride to the solution of the solid polymer in the liquid. The resulting adduct product is suitable for use as a paint binder for electrodeposited paints when diluted with water. The paint composition may be formed by mixing of pigments into the binder and then suspending the mixture in water.