Uncured Epoxy Research Articles

Contact dermatitis encountered in the production of epoxy resins.

THE EXTENSIVE use of cured epoxy resins is new in American industry. * The use of these substances will become even more commonplace as will the skin eruptions resulting therefrom, until proper precautions in their use are undertaken by means of dissemination of information regarding their dangers. The uncured epoxy resins of lower molecular weight are viscous and amber-colored liquids at room temperature. Their fluidity increases markedly when they are warmed to 55 C. before addition of a curing agent, otherwise known as a catalyst or hardener. The curing agents are amines of various types.† The mixture is then poured into molds and may be placed in ovens. Curing takes from 1½ to 24 hours, depending upon type, size of casting, and oven temperature. Exothermic heat of 100 to 150C. occurs during the cure. The resultant casting is a weather- and stress-resistant solid. EFFECT UPON THE SKIN