Patent ID: 7402650

Claim:
A process for preparing polyarylate, by reacting an alkaline aqueous solution of a bivalent phenol monomer having the structure of Formula 1 in contact with a solution of an aromatic dicarboxylic acid halogen compound in a hydrophobic organic solvent in the presence of a nonionic surfactant having 4˜20 of HLB, wherein, R1, R2, R3 and R4 are hydrogen, C 1 ˜C 12 alkyl, aryl or halogen independently; W is C 1 ˜C 30 alkylidene, C 2 ˜C 30 alkylene, C 3 ˜C 30 cycloalkylidene, C 3 ˜C 30 cycloalkene, C 2 ˜C 30 alkylene substituted for phenyl, oxygen, sulfur, sulfoxide, sulfone or single bond.