Waterborne epoxy curing agent

A waterborne epoxy curing agent comprising a reaction product of:

• a) at least one amine having at least one moiety in the formula of -QNH—, wherein Q is a divalent hydrocarbon group, and wherein the amine has at least one tertiary amino group and at least one primary amino group per molecule, wherein the amine includes one or more compounds represented by formula (I):
• wherein n is an integer not less than 1, wherein R1 and R2 are independently a substituted or unsubstituted C1 to C16 alkyl, alkenyl, alkadienyl, cycloalkyl, cycloalkenyl, cycloalkadienyl, aryl, or aralkyl group, and wherein the amine is N,N-dimethylaminopropylamine, N,N-diethylaminopropylamine, N,N-dipropylaminopropylamine, N,N-dibutylaminopropylamine, N,N-dimethyldipropylenetriamine, N,N-diethyldipropylenetriamine, N3-[3-[(3-aminopropyl) amino]propyl]-N1,N1-dimethyl-1,3-propanediamine, or a mixture thereof;
• and
• b) at least one polyether polyol modified epoxide having one or more epoxide groups, wherein a stoichiometric ratio is in a range of 1 to 100, wherein the stoichiometric ratio is a ratio of an equivalent number in active amine hydrogen atoms of the amine to an equivalent number of epoxide groups in the polyether polyol modified epoxide.