Epoxy Resins with Concrete

PART A - CHEMISTRY OF EPOXY RESINS In all the history of the coatings and plastics industries, more especially, since synthetically prepared raw materials have taken their principal position in the technology, there has not appeared a resin which has lent itself to so wide a variety of uses, to so wide a variety of applications, and which has been shown to have such a wide field of technical and economic utility, as does epoxy. Epoxy resins are essentially condensation products of epichlorhydrin and diphenylolpropane. The latter has been known as the usual phenolic compound of "reduced phenolics." Epichlorhydrin, closely related to glycerol, is readily obtained from natural glycerol, or in the process of making the synthetic product. It is usually obtained by the latter method. The epoxies represent a group of resins which range from low viscosity, solventless liquids, to highmelting-point solids. The name for this group of resins,