Pentaerythritol triacrylate → Urethane acrylate

Participants

Reaction Steps

A solution containing 50 ml of MIBK and 59.6 g (0.20 moles) of pentaerythritol triacrylate was added dropwisely to a solution containing 100 ml of MIBK and 22.2 g (0.1 moles) of isophorone diisocyanate included in a 500 ml flask at the temperature of 25° C., while air bubbling was conducted. After the dropwise addition was completed, 0.3 g of dibutyltin dilaurate was added to the mixture, and heating and stirring were conducted for 4 hours at the temperature of 70° C. After the reaction was completed, the obtained reaction solution was washed with 100 ml of 5% hydrochloric acid. Then, an organic layer was separated, and then solvent was removed under reduced pressure at the temperature of 40° C., or less to obtain 80.5 g of urethane acrylate which was a transparent and colorless viscous liquid.

Provenance & Evidence