Toluene 2,4-Diisocyanate → Urethane acrylate

Participants

Reaction Steps

In a 1 l glass reactor equipped with a stirrer, a thermometer and a dropping funnel were charged 242 g of trimethylolpropane diacrylate and 0.25 g of hydroquinone monomethyl ether, followed by adding dropwise 85 g of 2,4-tolylene diisocyanate over a period of 1 hour with keeping the temperature at 60° C. The content was stirred for 1 hour at this temperature, followed by adding 0.05 g of dibutyltin diacetate and then reaction was continued for further 2 hours. After completion of the reaction, there was obtained 325 g of polyfunctional urethane acrylate, which contained 0.03 % of isocyanate.

Provenance & Evidence