New photoreactive prepolymers for the color filter resist of LCD were designed and synthesized through the reaction between several kinds of epoxy resins and methacrylic acid (MMA) or itaconic acid (ITA). The chemical structures of the prepolymers were confirmed by NMR and FTIR spectroscopies. We investigated the photocure kinetics of the prepolymers using FT-IR spectroscopy, confirming high degree of photocuring of the prepolymers, could be obtained upon UV irradiation. We also figured out the polymers possessed good thermal stability, showing little change of transmittance in the visible range even after heating at 250degreesC for 1 hour The prepolymers showed good pattern resolution as low as several tens of microns.