The synthesis of a waterborne acrylic resin which was curable by radiation is presented. The variation of NCO% in synthetic process was analysed and the water thinning curve for this resin was given out. A water-borne paint was composed by the acrylic resin

with some adjuvants. The effect on the crosslinking degree has been studied concerning the light exposure time

the distance between light and film

different kinds of photoinitiators

the photosensitive adjuvants

as well as reactive diluent. The cured film showed good performance.