Recent advances in epoxy curing agent technology for low temperature cure coatings

摘要

Reports results from studies conducted on a polyfunctional amine adduct epoxy curing agent (EPI-CURE DPC-3293) as a means to design low temperature cure coatings. Through the judicious choice of epoxide resins and amine-functional curing agents,relatively fast reaction rates and resistance to moisture and humidity are maintained under low-temperature cure conditions, and that is evidenced by a good balance of performance properties of coating films. We have used differential scanning calorimetry (DSC) to study the extent of reaction as well as the glass transition temperatures (T{sub}g). Electrochemical impedance spectroscopy (EIS) has been used to predict the barrier properties of coating films. These results are compared with epoxide resinscured with a phenalkamine curing agent to illustrate some of the unique advantages of using multifunctional amine adduct curing agents for the curing of epoxide resins under sub-ambient cure conditions for a multitude of end-use applications.