Title:
ポリ乳酸の解重合方法
Document Type and Number:
Japanese Patent JP5280656
Kind Code:
B2
Abstract:
To provide a method for manufacturing methyl lactate of good qualities by depolymerizing polylactic acid by using an easily handleable catalyst capable of preventing deterioration in qualities of lactic acid.
The depolymerization method of polylactic acid comprises alcoholyzing polylactic acid using methanol at 60-100°C in the presence of a zinc compound catalyst composed of a zinc organic carboxylate and/or zinc carbonate.
COPYRIGHT: (C)2009,JPO&INPIT
Inventors:
Kenichi Ishihara
Minoru Nakajima
Minoru Nakajima
Application Number:
JP2007197628A
Publication Date:
September 04, 2013
Filing Date:
July 30, 2007
Export Citation:
Assignee:
Teijin Limited
International Classes:
C07C27/02; C07C51/09; C07C59/08; C07C67/03; C07C69/68; C08J11/16; C08J11/24; C08J11/26; C07B61/00
Domestic Patent References:
| JP2004250414A | ||||
| JP36009425B1 | ||||
| JP2002514661A | ||||
| JP7196578A | ||||
| JP2001316327A | ||||
| JP2004131675A |
Foreign References:
| US5264617 |
Other References:
NODA,M. and OKUYAMA,H.,Thermal catalytic depolymerization of poly(L-lactic acid) oligomer into LL-lactide: Effects of Al, Ti, Zn and Zr compounds as catalysts,Chemical & Pharmaceutical Bulletin,1999年,Vol.47, No.4,p.467-471
Attorney, Agent or Firm:
Taro Tameyama