Tbea linked epoxy-urethanes

Abstract From the Canadian patent

Novel epoxy-urethane resins are produced by the reaction of a urethane-alkanolamine adduct with an epoxy resin. The urethane-alkanolamine adduct is prepared by reacting a urethane prepolymer with a sterically hindered N-substituted ethanolamine such as t-butyl ethanolamine. The epoxy-urethane resin can be cured using ordinary epoxy curing agents for application as waterproofing membranes joint, sealants, and adhesives. Two-part resin systems comprising epoxy-urethane resins of the invention as the first part and, an appropriate curing agent as the second part avoid disadvantages characteristic of resin mixtures that rely on urethane cure chemistry.