Process for producing polycarbonate resin having specific termin

Details Process for producing polycarbonate resin having specific termin Process for producing polycarbonate resin having specific termin

1993-04-19

1994-06-07

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528125, 528126, 528171, 528174, 528196, 528201, C08G 6420

Patent

active

053190653

ABSTRACT:
There is provided a process for producing a polycarbonate resin containing less amounts of a terminal OH group and a residual monomer and having excellent heat resistance efficiently with a simple equipment. Said process comprises emulsifying an oligomer-containing reaction mixture obtained by the reaction of an alkaline aqueous solution of an aromatic dihydroxy compound with phosgene in the presence of an organic solvent, after adding a molecular weight modifier thereto, and performing polymerization while the reaction mixture is allowed to stand still in the emulsified state.

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patent: 4959456 (1990-09-01), Ashida et al.
patent: 4977233 (1990-12-01), Okamoto et al.
patent: 4997903 (1991-03-01), Okamoto
patent: 5037941 (1991-08-01), Weston et al.
patent: 5037942 (1991-08-01), Hunt et al.
JP-62-089 723, Teijin Chem., Ltd., "Production of Polycarbonate", Apr. 24, 1987, p. 1.
Encyclopedia Ind. Chem. Anal., vol. 17, Jun. 1973, pp. 329-352, Horbach, et al., "Polycarbonates".

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