Reaction of polyurethane isocyanate with water

German chemist A.Wurtz believes that isocyanate reacts with water to first generate unstable carbamic acid, which is then decomposed into carbon dioxide and amines. In the presence of excess isocyanate, the generated amine and isocyanate continue to react to form substituted urea. Their reaction processes are expressed as follows:R—NCO+ H2OR—NHCOOHR—NH2+CO2↑R—NH2 +R—NCOR—NHCONH—R（1 ）The application of the…