Epoxy acrylates such as bisphenol type (I-A), propylene glycol type (II-A), and phthalic acid ester type (III-A) were prepared from addition reaction between each epoxy resin and acrylic acid. These reactions were carried out in the absence of solvent and in the presence of quaternary ammonium salt. The rate of addition reaction between glycidyl ether-type epoxide and acrylic acid obeyed first order. The rates of addition reaction between glycidyl ester-type epoxide and acrylic acid obeyed first order at 80°C, but obeyed second order rather than first order at 90°C and above. The rates of photocrosslinking of epoxy acrylates were measured by IR spectrophotometry. Epoxy acrylates with benzoin ethyl ether (1 wt-%) were irradiated with a high-pressure mercury lamp in oxygen-free atmosphere. The rates of photocrosslinking of epoxy acrylates II-A, III-A, and I-A decrease in that order.
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Nishikubo et al. (1974) studied this question.