Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PROCESS FOR PRODUCTION OF HIGHLY POLYMERIZED AROMATIC POLYCARBONATE RESIN
Document Type and Number:
WIPO Patent Application WO/2011/062220
Kind Code:
A1
Abstract:
Disclosed is an improved method for highly polymerizing an aromatic polycarbonate resin, which enables the increase in molecular weight of the aromatic polycarbonate resin satisfactorily while keeping good quality of the resin. Specifically, an aromatic polycarbonate is linked to an aliphatic diol compound having a boiling point of 240°C or higher (preferably in an amount of 0.01 to 1.0 mole per mole of the total amount of the terminal of the aromatic polycarbonate) through a transesterification reaction in the presence of a transesterification catalyst under reduced pressure conditions (preferably at a reduced pressure ranging from 13 kPaA (100 torr) to 0.01 kPaA (0.01 torr)), thereby increasing the molecular weight of the resulting molecule. In this manner, the weight average molecular weight (Mw) of the aromatic polycarbonate after the transesterification reaction can be increased preferably by 5,000 or more compared to that of the aromatic polycarbonate before the transesterification reaction.

More Like This:
JPH06329781POLYCARBONATE/POLYORGANOSILOXANE COPOLYMER AND RESIN COMPOSITION
JP2695442[Title of Invention] Polyamide-imide elastomer
JP4155068Resin and its manufacturing method, and molded products using it
Inventors:
ISAHAYA YOSHINORI (JP)
YOSHIDA SHU (JP)
KATO NORIYUKI (JP)
FURUHASHI HIROKI (JP)
Application Number:
PCT/JP2010/070560
Publication Date:
May 26, 2011
Filing Date:
November 18, 2010
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
ISAHAYA YOSHINORI (JP)
YOSHIDA SHU (JP)
KATO NORIYUKI (JP)
FURUHASHI HIROKI (JP)
International Classes:
C08G64/42
Domestic Patent References:
WO1995027749A11995-10-19
Foreign References:
JPH04153218A1992-05-26
JPH05287070A1993-11-02
JP2000281769A2000-10-10
JPS5019600A1975-03-01
JPH02153923A1990-06-13
US5521275A1996-05-28
EP0595608A11994-05-04
US5696222A1997-12-09
JP4112979B22008-07-02
JP2008514754A2008-05-08
JP4286914B22009-07-01
JPH0694501A1994-04-05
JP2009102536A2009-05-14
Other References:
"Polycarbonate Handbook", NIKKAN KOGYO SHIMBUN LTD., pages: 344
"Polycarbonate Resin", NIKKAN KOGYO SHIMBUN LTD., pages: 144
See also references of EP 2502949A4
Attorney, Agent or Firm:
TAKANO Mifune (JP)
Mifune Takano (JP)
Download PDF:
View/Download PDF      PDF Help



 
Previous Patent: SUPPORT BAR AND SUBSTRATE CONTAINING CASSETTE

Next Patent: FOOD ADDITIVE FOR ICE CREAM