the disclosure relates to a composition of matter comprising a blend of an ungelled modified cross - linking agent , certain water - dispersible non - gelled polymeric materials carrying a cationic charge and an acid solubilizer in certain stated proportions . the disclosure also relates to the use of these compositions of matter in the process of electrodepositing films on an electrically conductive surface which comprises passing an electric current between a cathode comprising said surface and an electrically conductive anode immersed in an aqueous dispersion of said composition .