2-Hydroxyethyl acrylate → Urethane acrylate

Participants

Reaction Steps

212 g (approx. 0.2 mol) Tego-Diol BD-1000, 70 g ethyl acetate and 0.1 g dibutyltin dilaurate are introduced into a 2 l 3-neck flask equipped with thermometer, reflux cooler, mechanical stirrer and drying tube, and 126 g (0.6 mol) trimethyl-hexamethylene diisocyanate added in measured doses, accompanied by cooling, over a period of 30 minutes. The reaction mixture is stirred for 20 hours at room temperature until the isocyanate content has fallen to 7.7%. 91 g hydroxyethylacrylate is added accompanied by cooling. After 72 hours at room temperature, an isocyanate value of 0 is recorded, at which the reaction is ended. The ethyl acetate can be distilled off in fine vacuum.

Provenance & Evidence