METHOD OF DEPOLYMERIZING AROMATIC POLYCARBONATE

Title:

METHOD OF DEPOLYMERIZING AROMATIC POLYCARBONATE

Document Type and Number:

WIPO Patent Application WO/2003/035592

Kind Code:

A1

Abstract:

A method of depolymerizing an aromatic polycarbonate which comprises reacting the aromatic polycarbonate with water, a C₁₋₆ aliphatic alcohol, or a phenol optionally substituted by a C₁₋₁₀ hydrocarbon group in a supercritical carbon dioxide fluid or reacting the polycarbonate with the supercritical fluid of either a C₁₋₆ aliphatic alcohol or a phenol optionally substituted by a C₁₋₁₀ hydrocarbon group. By this depolymerization method, an aromatic polycarbonate can be depolymerized at a high reaction rate and useful ingredients generated by the depolymerization can be recovered at a high percentage. Thus, useful ingredients can be recovered for recycling from an aromatic polycarbonate which has been discarded or spent.

Inventors:

BAN TETSUO (JP)
YOSHISATO EISHIN (JP)
MURAMOTO MASAHARU (JP)
OHASHI KENJI (JP)
HIRATA MASUMI (JP)

Application Number:

PCT/JP2002/010950

Publication Date:

May 01, 2003

Filing Date:

October 22, 2002

Export Citation:

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Assignee:

TEIJIN LTD (JP)
BAN TETSUO (JP)
YOSHISATO EISHIN (JP)
MURAMOTO MASAHARU (JP)
OHASHI KENJI (JP)
HIRATA MASUMI (JP)

International Classes:

C07C27/02; C07C37/50; C07C39/16; C07C68/06; C08J11/10; (IPC1-7): C07C27/02; C07C37/52; C07C39/15; C07C68/06; C07C68/08; C07C69/96; C08G64/42; C08J11/10

Domestic Patent References:

WO2001077060A1

2001-10-18

Foreign References:

EP0641758A2	1995-03-08
JP2001247520A	2001-09-11
JP2000178375A	2000-06-27
US5712406A	1998-01-27
JP2002114722A	2002-04-16
US6262294B1	2001-07-17

Other References: