Bisphenol A → Carbonic acid;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol

Participants

Reaction Conditions

Reaction Steps

A 1-l glass melt polymerization reactor was passivated by acid washing, rinsing with deionized water and overnight drying at 70° C. it was charged with 130.4 g (608.6 mmol) of diphenyl carbonate and 120 g (525.6 mmol) of bisphenol A. A solid nickel stirrer was suspended in the mixture and the reactor was purged with nitrogen and heated to 180° C., whereupon the reaction mixture melted. Upon complete melting, it was allowed to equilibrate for 5-10 minutes, with stirring. There were then added, with stirring, 600 μl of a 0.221 M aqueous tetramethylammonium maleate solution and 500 μl of a 0.01 M aqueous sodium hydroxide solution. Heating at 180° C. and stirring were continued for 5 minutes, after which the temperature was raised to 210° C. and the pressure decreased to 180 torr, whereupon phenol began to distill. After 10 minutes, a bisphenol A polycarbonate oligomer had been produced.

Provenance & Evidence