Patent Number: 6,252,034

Title: Process for producing a polycarbonate resin

Abstract: A process for producing a polycarbonate resin through the melt polycondensation of an aromatic diol compound and a carbonic acid diester compound, wherein (1) valves, (2) gear pumps, (3) flanges and (4) flow passages having the specified structures and characteristic properties are used in the production process. According to the present invention, a high-quality polycarbonate can be obtained by an industrial process.

Inventors: Uenishi; Kazuhiro (Iwakuni, JP), Shimonaru; Masashi (Iwakuni, JP), Sawaki; Toru (Iwakuni, JP), Sasaki; Katsushi (Iwakuni, JP)

Assignee: Teljin Limited

International Classification: C08G 64/20 (20060101); C08G 64/30 (20060101); C08G 64/00 (20060101); C08G 064/00 ()

Expiration Date: 06/26/2018