4-Methoxyphenol → Urethane acrylate

Participants

Reaction Conditions

Reaction Steps

An 80 wt-% solution of a urethane acrylate in butyl acetate was prepared by initially dissolving 0.125 mole of neopentyl glycol at 65° C. in butyl acetate. 1 Mole of trimeric hexane diisocyanate was then added at 65° C. and the batch was heated to 70° C. After the exothermic reaction had ended, heating was continued at 80° C. until a constant NCO value was obtained. 4-Methoxyphenol (inhibitor) and dibutyltin dilaurate (catalyst) were then added in a quantity of 0.05 wt-% in each case, based on the total batch. 2.75 Moles of butane diol monoacrylate were added at 60° C. in such a way that a temperature of 80° C. was not exceeded. After an NCO value of <0.1 was obtained, the solids content was then adjusted with butyl acetate.

Provenance & Evidence