Patent ID: 7759432

Claim:
An aqueous emulsion comprising: an aqueous phase consisting essentially of water; emulsified resin particles dispersed in the aqueous phase, the resin particles consisting essentially of a mixture of: a bisphenol A based epoxy resin, and a sulfonated polyester resin of the formula where: R is an alkylene; R′ is an arylene; p and n represent a number of repeating segments; and X is an alkali metal; and a nonionic surfactant comprising a block copolymer of polyethylene oxide and polypropylene oxide, wherein: the emulsified particles have an average diameter of from about 10 nm to about 500 nm, and a solids content of the emulsion comprises from about 1% to about 40% by weight of the sulfonated polyester resin and from about 60% to about 99% by weight of the epoxy resin.