| The recent development at home and abroad of water-borne modification of epoxy resin is summarized. The methods for water modification of epoxy resin are presented, especially the one based on the emulsification, water-reducible and grafting process., and problems in the fundamental study and methodology development is presented with emphasis on the recent progress. The principle of the design of water-borne epoxy resin coatings' formulations and the fundamental composition of coating and solvent are overviewed.In this paper a kind of self-emulsifiable epoxy resin was synthesized by poly condensation of liquid epoxy resin (CYD-128), diphenylol propane and dihydroxy polyester and by the phase inversion technique a stable waterborne epoxy resin emulsion has been prepared. The effects of molecular weight of dihydroxy polyester the amount of polyester, the proportion of CYD-128 and diphenylol propane, the feeding process of feedstock on centrifugal stability and the average particle size of epoxy resin emulsion were in vestigated.In order to improve the properties of the dry film such as corrosion resistance property, the self-emulsifiable epoxy resin was modified. The effects of the proportion of multiblock copolymer and modifier, the construction of modifier, the reaction temperature and the kind of catalyst on the paint coated film performance were investigated.The structure of the prepolymer, the self-emulsifiable epoxy resin and the modified epoxy resin has been characterized with FTIR; the stability of the emulsion has been studied with laser particle size analysis and also SEM, TGA and DSC were used to analysis the dry film properties.The result showed that the chemical modification elaborated in this paper was feasible, with suitable curing agent a waterborne epoxy resin coatings with good film properties can be prepared.A glossy coatings formulation based on TiO2, BaSO4, magnesium silicate, including additives and testing properties.
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