Patent ID: 8491729

Claim:
A coating composition for metallic substrates comprising: reaction products of a polymeric resin having a plurality of first functional groups with a plurality of polyfunctional bridging molecules each having at least a second functional group and a third functional group; wherein at least a portion of said second functional groups have reacted with at least a portion of said first functional groups to form one of a Michael addition product, an enamine, a hydrazone, a reductive amination product, or an amide thereby binding at least a portion of said polyfunctional bridging molecules to said resin; said third functional group selected from the group consisting of a carboxylate function, a thiol function, a silane function, a phenolate function, an acetoacetonate function, an imine function, a phosphate function, a phosphonate function and mixtures thereof, wherein said third functional group can chelate to a metal substrate; and at least one of a group IVB element from the Periodic Table and a group VB element of the Periodic Table.