Reacción #2502189

Ecuación de reacción

dibutyltin dilaurate

isophorone diisocyanate

2-hydroxyethyl acrylate

di-t-butyl-hydroxytoluene

dimethylolpropionic acid

p-methoxyphenol

→

urethane acrylate

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroIn a reaction vessel equipped with a stirrer
2. 2
   workup.ADDITIONwere charged
3. 3
   Temperaturaafter heating
4. 4
   Temperaturathe mixture was heated again
5. 5
   workup.STIRRINGwas continuously stirred at 80° C
6. 6
   OtroAfter confirming by an infrared absorption spectrum that an absorption spectrum (2280 cm−1) of an isocyanate group

Procedimiento

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.

Fuente