Title:
【発明の名称】安定化されたポリカーボネートの製造法
Document Type and Number:
Japanese Patent JP3071641
Kind Code:
B2
Abstract:
A process for the production of a stabilized polycarbonate which comprises melt-polycondensing an aromatic dihydroxy compound and a carbonic acid diester in the presence of a polycondensation catalyst and then, after the reaction mixture shows an intrinsic viscosity of at least 0.1, adding at least one stabilizer selected from the group consisting of specific compounds having a sulfanate group and a sulfonic acid anhydride group in an amount of 0.01 to 500 ppm of a polycarbonate to be formed, to form a polycarbonate having a desired intrinsic viscosity.
Inventors:
Shigeki Hirata
Wataru Funakoshi
Katsuji Sasaki
Wataru Funakoshi
Katsuji Sasaki
Application Number:
JP20070694A
Publication Date:
July 31, 2000
Filing Date:
August 25, 1994
Export Citation:
Assignee:
Teijin Limited
International Classes:
C08G64/20; C08G64/30; C08G64/40; C08K5/36; C08K5/41; C08K5/42; C08K5/50; C08L69/00; (IPC1-7): C08G64/30; C08K5/41; C08L69/00
Domestic Patent References:
| JP59285A |
Attorney, Agent or Firm:
Sumihiro Maeda