A moisture cured one-component polyurethane resin is cures by the reaction of its isocyanate group with moisture in the air or adsorbed water on the substrate. This curing system was contrived in Germany and had been applied to protective coating for 30 years. Good protective performance of this coating system for more than 20 years demonstrated through practical applications.
From our studies on curing mechanism and protective performance, we found that the coating film dried at a temperature as low as 5°C and at a humidity as low as 40% RH showed excellent protective performance.
Protective performance of the coating film after impact resistance test was also proved to be good because of its flexibility.
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