2-Hydroxyethyl Methacrylate → Urethane methacrylate

Participants

Reaction Conditions

Reaction Steps

In a 3 L four-necked flask equipped with a stirrer, a reflux condenser tube, a gas introducing pipe, and a thermometer, 500 g of diphenylmethane diisocyanate, 800 g of Actcol P-22 (polyether polyol manufactured by MITSUI TAKEDA CHEMICAL, INC.: weight average molecular weight=1,000), 90 g of TOHO polyethylene glycol #600 (polyethylene glycol manufactured by TOHO Chemical Industry Co., Ltd.: weight average molecular weight=600), 100 g of Kuraray polyol P-2010 (adipate polyester polyol manufactured by Kuraray Co., Ltd.: weight average molecular weight=2,000), and 0.15 g dibutyltin dilaurate were placed. The mixture was reacted while being stirred at 60° C. for 4 hours. Subsequently, the reactant was stirred while 260 g of 2-hydroxyethyl methacrylate were added dropwise over 2 hours. After the completion of the dropwise addition, the resultant was reacted by stirring for 5 hours to obtain urethane methacrylate. Subsequently, to the urethane methacrylate, 750 g of styrene monomer was added to obtain a urethane methacrylate resin (U-3). The weight average molecular weight of the urethane methacrylate resin (U-3) was 6,890.

Provenance & Evidence