4-Methoxyphenol → Urethane acrylate

Participants

Reaction Conditions

Reaction Steps

In a reaction vessel equipped with a stirrer, a thermometer and a condenser, 3750 g (3 mol) of polycaprolactonediol (PLACCEL212, manufactured by DAICEL CHEMICAL INDUSTRIES, LTD.) having a molecular weight of 1250 as the polymer polyol, 402 g (3 mol) of dimethylolpropionic acid as the dihydroxyl compound having a carboxyl group, 1554 g (7 mol) of isophorone diisocyanate as the polyisocyanate, 238 g (2.05 mol) of 2-hydroxyethyl acrylate as the (meth)acrylate, and p-methoxyphenol and di-t-butyl-hydroxytoluene (1.0 g each) were charged. The mixture was heated to 60° C. while stirring, and after heating was stopped, 1.6 g of dibutyltin dilaurate was added. When the temperature in the reaction vessel began to decrease, the mixture was heated again and was continuously stirred at 80° C. After confirming by an infrared absorption spectrum that an absorption spectrum (2280 cm−1) of an isocyanate group disappeared, the reaction was stopped to obtain a urethane acrylate compound as a viscous liquid.

Provenance & Evidence