Patent ID: 6956086

Claim:
An epoxy functional surfactant comprising the reaction product of: i) an amidoamine composition comprising oligomeric amidoamine compounds having the structure: wherein each R′ is independently hydrogen or an alkyl group containing 1-6 carbon atoms provided that at least one R′ is hydrogen, R 2 is an aliphatic, cycloaliphatic, or aromatic residue of a primary amine compound having 2 to 24 carbon atoms and optionally containing non-reactive oxygen or at most an average of 4 secondary and/or tertiary nitrogen atoms in the backbone of the primary amine compound, the average of x, based on the amidoamine composition, is at least 0.2, and Z comprises the residue of a polyoxyalkylene polyether polycarboxylic acid compound; with ii) at least one epoxy resin having a functionality of from greater than 0.8 epoxide group per molecule at an equivalent weight ratio of the epoxy resin to the amidoamine composition of at least 2:1; wherein the amidoamine composition comprises the reaction product of primary polyamine compounds with polyoxyalkylene polyether polycarboxylic acid compounds at a corresponding equivalent weight ratio of at least 4.0:1 under oligomeric reaction conditions effective to increase the amine nitrogen equivalent weight of the amidoamine composition by at least 10% over the average acid equivalent weight of the polyoxyalkylene polyether polyacid composition.