Title:
MANUFACTURING METHOD OF AROMATIC POLYCARBONATE
Document Type and Number:
Japanese Patent JP3883922
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of an aromatic polycarbonate which, being what makes a crystalline aromatic polycarbonate the one having a higher degree of polymerization by solid-phase polymerization, maintains a straightened flow of the used inert gas and eliminates the temperature unevenness inside the polymerization reactor and the unevenness of polymerization degree in the obtained product.
SOLUTION: The manufacturing method of the aromatic polycarbonate is the one in which the crystalline aromatic polycarbonate is made to have a higher degree of polymerization by the solid-phase polymerization and which uses an apparatus having a ratio DV1/D of 0.2-0.8 wherein DV1 is an inside diameter of a pipe (A) provided for exhausting the used inert gas and D is an inside diameter of the polymerization reactor.
Inventors:
Kenji Ohashi
Ken Katsuta
Hirotaka Suzuki
Ryoichi Nagashima
Ken Katsuta
Hirotaka Suzuki
Ryoichi Nagashima
Application Number:
JP2002213361A
Publication Date:
February 21, 2007
Filing Date:
July 23, 2002
Export Citation:
Assignee:
Teijin Limited
International Classes:
C08G64/20; (IPC1-7): C08G64/20
Domestic Patent References:
| JP5170893A | ||||
| JP2001122954A | ||||
| JP8059813A | ||||
| JP6228299A | ||||
| JP11158259A | ||||
| JP10139873A | ||||
| JP2000219728A |
Attorney, Agent or Firm:
Hideko Mihara
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