Abstract
Monoallylester derivatives having allyl group and hydroxyl group were synthesized by the reaction of a monoallylester with epoxy compounds, the use of which could be thought to improve the adhesive property of diallyl phthalate resins (DAP). Lap shear strength of a cured resin was improved by the modification of diallyl phthalate resin with synthesized monoallylester derivatives. By this modification, the electrical property was maintained though its heat resistance and anti-water property were decreased. While, by adding a monoallylester derivative that contained two ally! groups, the lap shear strength increased by 140% in maximum, moreover the decrease of other properties of the cured resin was very small. Hence, the modification with a monoallylester derivative that contained a single allyl group led to the large decrease of the properties except adhesiveness of the cured resin, because those derivatives acted as a plasticizer. Water absorption was increased with increasing the concentration of hydroxyl group in the modification system.
