Trimethylolpropane → Carbamic acid, ethyl ester

Participants

Reaction Steps

An autoclave was charged with a mixture of 246.7 parts of polycaprolactonediol (number average molecular weight 2000), 7.4 parts of 1,4-butanediol, 5.1 parts of trimethylolpropane, 17.9 parts of dimethylolpropionic acid, 123.0 parts of IPDI and 400 parts of acetone, followed by introducing nitrogen gas so as to be replaced, reacting at 80° C. for 7 hours to obtain an acetone solution of an isocyanate (NCO)-terminating urethane prepolymer having a NCO content of 1.67%, cooling the acetone solution at 30° C., adding 13.5 parts of triethylamine, adding 600 parts of water, distilling off the acetone at 50 to 60° C. under vacuum to obtain a 40.0% solid content water based urethane resin emulsion C-2.

Provenance & Evidence