Title:
ポリエステルの解重合方法、および当該解重合方法を用いたポリエステルモノマーの回収方法
Document Type and Number:
Japanese Patent JP4680266
Kind Code:
B2
Abstract:
It is an object of the present invention to provide a method capable of rapidly depolymerizing a polyester and an unsaturated polyester by a simple apparatus. One embodiment of the depolymerization method of the invention comprises irradiating a polyester with microwaves in the presence of an alkylene glycol in which a titanium oxide fine powder having a bulk density of not more than 0.3 g/cm 3 has been dispersed. Another embodiment comprises irradiating a polyester or an unsaturated polyester with microwaves in the presence of a monohydric alcohol or polyhydric alcohol containing an alkali metal and/or an alkaline earth metal. By the use of such a depolymerization method of the invention, raw materials of a polyester, an unsaturated polyester or a polyurethane, such as an alkylene glycol and an unsaturated dibasic acid, can be recovered efficiently.
Inventors:
Kazutoshi Ikenaga
Application Number:
JP2007549032A
Publication Date:
May 11, 2011
Filing Date:
September 29, 2006
Export Citation:
Assignee:
Kumamoto Techno Industrial Foundation
International Classes:
C08J11/24; C08J11/16
Domestic Patent References:
| JP2003292594A | 2003-10-15 | |||
| JP2006335856A | 2006-12-14 | |||
| JP2000212117A | 2000-08-02 | |||
| JPH11302208A | 1999-11-02 |
Attorney, Agent or Firm:
Koji Makimura