Ethylene Oxide → Urethane acrylate

Participants

Reaction Steps

To a reaction vessel equipped with a stirrer, 100 gm of ARONIX M113 manufactured by Toagosei Chemicals, 124.7 gm of isophorone diisocyanate, 1 gm of dibutyltindilaurate, and 0.3 gm of 2,6-di-t-butyl-4-methylphenol were added. To this, 842.7 gm of a copolymerized diol of ethylene oxide and 1.2-butylene oxide [ethylene oxide:1,2-butylene oxide =2:8 (by weight)] of a number average molecular weight of 2,000 was added while maintaining the temperature in the 40° to 50° C. range, and the mixture was reacted for 2 hours. Then 32.6 gm of hydroryethylacrylate was added, after which the mixture was continuously stirred for 5 hours at 50° to 60° C. to complete the reaction. A urethane acrylate [A-3] of a number average molecular weight of about 7,120 was obtained.

Provenance & Evidence