Title:
ポリカーボネートの製造方法
Document Type and Number:
Japanese Patent JP2008524406
Kind Code:
A
Abstract:
An improvement to the phase interface process of preparing aromatic polycarbonate is disclosed. The process is characterized in that the phosgenation is carried out at 0 to 40° C., and in that the temperature of the reaction mixture at the time of addition of the catalyst at 10 to 40° C., and in that the molar ratio of aromatic dihydroxy compounds to phosgene at 1:1.05 to 1:1.20. The polycarbonate thus produced is characterized in its low content of carbamates, making it particularly suitable for the preparation of optical storage media.
Inventors:
Hermann coult
Wolfgang Abelt
Wilfried Haese
Helmut Einberger
Alexander Meyer
Andreas Frankenau
Uri Franz
Christian A
Stephen De Foss
Belt light tinks
Wolfgang Abelt
Wilfried Haese
Helmut Einberger
Alexander Meyer
Andreas Frankenau
Uri Franz
Christian A
Stephen De Foss
Belt light tinks
Application Number:
JP2007547244A
Publication Date:
July 10, 2008
Filing Date:
December 09, 2005
Export Citation:
Assignee:
Bayer MaterialScience AG
International Classes:
C08G64/24
Domestic Patent References:
| JPH07165901A | 1995-06-27 | |||
| JPH09165442A | 1997-06-24 | |||
| JP2002193891A | 2002-07-10 | |||
| JPH06211976A | 1994-08-02 |
Foreign References:
| WO2004063249A1 | 2004-07-29 |
Attorney, Agent or Firm:
Mitsuo Tanaka
Takuji Yamada
Muneo Yamamoto
Yuko Goto
Takuji Yamada
Muneo Yamamoto
Yuko Goto