2-Ethylhexyl acrylate → Urethane acrylate

Participants

Reaction Steps

A four-neck flask fitted with a stirrer, a dropping funnel, a nitrogen inlet tube and a thermometer was charged with 1,000 g of the previously prepared polyoxyalkylene polyol (a1-1), 100 g of isophorone diisocyanate (IPDI), 700 g of 2-ethylhexyl acrylate as a diluent, and 0.1 g of dibutyltin dilaurate as a catalyst, and these components were reacted for 4 hours at a temperature of 100° C. The infrared absorption spectrum of the reaction mixture was measured, and once it had been confirmed that the isocyanate group absorption (2250 cm−1) had disappeared, 23 g of the monoisocyanate (HEA-H6XDI) was added to the reaction mixture, and reaction was continued for a further 2 hours at a temperature of 100° C. Subsequently, the infrared absorption spectrum of the resulting reaction mixture was measured again, confirming that the isocyanate group absorption (2250 cm−1) had disappeared.

Provenance & Evidence