Triethylene glycol monomethyl ether → Boric Acid

Participants

Reaction Conditions

Reaction Steps

207.6 Grams (2.0 mols) of trimethyl borate was added to 174 g (1.0 mol) of diethylene glycol monomethacrylate and 328 g (2.0 mols) of triethylene glycol monomethyl ether, followed by keeping them at 60° C. for 1 hour with stirring in a dry air atmosphere and then heating to 75° C. After the temperature reached 75° C., the pressure in the system was gradually reduced. The system was kept at a pressure of 2.67 kPa (20 mmHg) or lower for 6 hours to remove volatile matters produced with progress of ester interchange reaction of boric acid and excess trimethyl borate, followed by filtration to obtain 495 g of a polymerizable boron-containing compound C represented by the formula (1). An infrared absorption spectrum of the resulting polymerizable boron-containing compound C was measured to confirm that the absorption band originating from hydroxyl group at 3300 cm−1 disappeared.

Provenance & Evidence