Process for preparation of modified aromatic hydrocarbon resin.

摘要

A modified aromatic hydrocarbon resin is prepared by reacting an aromatic hydrocarbon-formaldehyde resin with an unsaturated polybasic acid or an anhydride thereof, if desired,togetherwith a saturated polybasic acid or an anhydride thereof, while making water or water and an aliphatic alcohol present in the reaction system and removing the for- maidehyde formed by the reaction. The cured product has a good mechanical strength and a high resistance to water and alkalis.