Aqueous coating compositions and methods for preparing same.

摘要

Aqueous compositions suitable for sanitary can coatings comprise the neutralized water dispersible ionic polymer product of the reaction of an epoxy resin with an acid polymer, and a different resin which is not necessarily self-dispersible in water. The different resin is introduced either preformed at any stage or is prepared, in situ, in the presence of the epoxy resin esterified with acid polymer either before or after the ionic epoxy resin-acid polymer product is dispersed in water. The epoxy resin-acid polymer product acts as a polymeric surfactant capable of keeping even the normally non self-dispersible second polymer in stable dispersion in water.