Réaction #1797502

Équation de réaction

dibutyl tin dilaurate

2-acryloyloxyethylisocyanate

p-methoxyphenol

di-t-butyl-hydroxytoluene

→

urethane acrylate

Conditions de réaction

Traitement

1. 1
   Autreequipped with a stirring device
2. 2
   Températureheating
3. 3
   TempératureHeating
4. 4
   workup.STIRRINGstirring
5. 5
   Autrewas continued at 80° C

Mode opératoire

625 g (0.5 mol) of polyester polyol in the form of polycaprolactone diol (Daicel Chemical Industries, PLACCEL212, molecular weight: 1,250) and 142 g (1.0 mol) of 2-acryloyloxyethylisocyanate and 1.0 g each of p-methoxyphenol and di-t-butyl-hydroxytoluene were placed in a reaction vessel equipped with a stirring device, thermometer and condenser. After heating to 60° C. while stirring, heating was discontinued followed by the addition of 0.2 g of dibutyl tin dilaurate. Heating was resumed when the temperature inside the reaction vessel began to drop and stirring was continued at 80° C. The reaction was completed by confirming that the absorption spectrum of the isocyanate group (2,280 cm−1) had disappeared based on the infrared absorption spectrum to obtain a urethane acrylate compound in the form of a viscous liquid. The average molecular weight of the resulting urethane acrylate (UA-1) was 1,600.

Source