the present invention relates to a new method of making the dimethacrylate ester of alkoxylated bisphenol - a via transesterification with methyl methacrylate . this transesterification reaction proceeds at low temperatures and is driven by the removal of methanol as a methanol / saturated hydrocarbon azeotrope . the lower temperature reaction advantageously inhibits polyerization of the feed ester . the reaction is catalyzed by potassium based catalysts .