4-Methoxyphenol → HCID 21930543, compound

Participants

Reaction Conditions

Reaction Steps

Into a 1-liter 3-necked flask provided with a stirrer and thermometer were metered in 425 parts of dodecabutyleneglycol (tradename: PTG-850, manufactured by Hodogaya Chemical Industries Co., Ltd, molecular weight 850), 0.43 parts of di-n-butyltin dilaurate, 0.4 parts of hydroquinone monomethylether, followed by stirring at 55° C. and adding dropwise, 222 parts of isophorone diisocyanate in 3 hours. After completion of the dropwise addition, the reaction was further continued for 3 hours at 70° C. and then temperature was reduced to 60° C., then 122 parts of 2-hydroxyethyl acrylate was added dropwise in 2 hours. Since the viscosity increased, 193 parts of n-butyl acetate was added and the reaction was continued for 5 hours at 70° C. to give an urethane diacrylate (UPA-2) with a solids concentration of 80% by weight.

Provenance & Evidence