Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
AROMATIC POLYCARBONATE
Document Type and Number:
Japanese Patent JP2005179497
Kind Code:
A
Abstract:

To provide an aromatic polycabonate little in foreign matter content and superior in hue while maintaining molding characteristics.

This aromatic polycarbonate is an aromatic polycarbonate which is obtainable by a transesterification method and of which the viscosity-average molecular weight is 16,000 or larger, and in which the value expressed by formular (1):α=p2 ρ/[1-p2 (1-ρ)] is 0.03 to 0.3, and the number of fisheyes is in the range of 1,500 or smaller. In a method of manufacturing the aromatic polycarbonate composition, in filtering the aromatic polycarbonate with a polymer filter during the time when it is still in a molten state and after adding an additive to it and kneading it, the filter element of the polymer filter has a supporting plate for the filter.


Inventors:
TAYAMA TAKAO
Application Number:
JP2003422333A
Publication Date:
July 07, 2005
Filing Date:
December 19, 2003
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI CHEM CORP
International Classes:
C08G64/06; C08G64/40; (IPC1-7): C08G64/06; C08G64/40
Domestic Patent References:
JP2002249575A2002-09-06
JP2001079927A2001-03-27
JP2005126496A2005-05-19
JP2005126495A2005-05-19
JP2005126494A2005-05-19
JP2004249575A2004-09-09
JP2001009214A2001-01-16
Foreign References:
WO2003031516A12003-04-17
Other References:
P.J.フローリ著,岡小天・金丸競訳, 高分子化学 下, JPN6008060841, 15 January 1956 (1956-01-15), pages 323 - 328, ISSN: 0001193554
Attorney, Agent or Firm:
Hasegawa Soji