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

Participants

Reaction Conditions

Reaction Steps

0.25 mol bisphenol A, 0.27 mol diphenyl carbonate 3.5×10-6 mol tetrabutyl ammonium bis-4-nitrobenzoate, 6×10-3 mol phenyl benzoate were added to the glass reactor flushed with nitrogen at room temperature. The temperature was increased to 140° C. in 11/2 hour duration. Later the pressure was reduced from atmosphere to 110 mm Hg and temperature increased to 240° C., and on maintenance of these conditions for 1 hour, about 85% phenol was collected. Subsequently, the temperature was increased to 270° C. and pressure reduced to 10 mm and under these conditions most of the phenol was collected in 2 hours. Finally, the reaction mixture was kept at 285° C. and 1 mm for 1 hour to remove traces of phenol. The polymer, bisphenol A polycarbonate obtained in 99% yield was white in color and its relative viscosity was 1.32.

Provenance & Evidence