This paper deals with acrylation of hydroxyl groups of a new type water soluble acrylate and quaternary ammonium salt groups-containing phenolic resin using acryloyl chloride. The hydroxyl groups were formed during ring-opening reaction of epoxy phenolic resin with acrylic acid and triethylamine hydrochloride. Effects of reaction time

reaction temperature

molar ratio of acryloyl chloride/OH on conversion of hydroxyl group are studied. Photosensitivity of the acrylated resin with that of unacrylated one is compared. The results show that the optimum reaction conditions are: the molar ratio of acryloyl chloride/OH of the resin=1.5/1

the reaction temperature is 40～50 ℃ and the reaction time is 1～2 h. The hydroxyl groups of the acrylate and quaternary ammonium salt-containing phenolic resin after reaction with acryloyl chloride are converted more than 75% to acrylate groups and the photocrosslinked gel of the resin after modification is almost twice of that before modification.