A boron-containing vinyl monomer

p-boronobenzyl 2-methacrylate (V) has been synthesized and polymerized. p-Boronobenzyl 2-methacrylate was readily polymerized in alcohol by AIBN to polymer having melting point 320-5℃. It was copolymerized with MMA in bulk and a hard and transparent glass sheet with softening point 158 ℃ containing 8% of (V) was obtained. It has been found that these boron-containing organic glasses are more heat-resistant than ordinary organic glass plexiglass.