Title:
PRODUCTION METHOD OF POLYESTER
Document Type and Number:
Japanese Patent JP2018145221
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To produce a polyester that is an aliphatic/aromatic polyester obtained by using in combination an aliphatic diol component as a diol component such as PBAT and so on and an aliphatic dicarboxylic acid component and an aromatic dicarboxylic acid component as a dicarboxylic acid component, has a small content of THF and oligomer, and has excellent color tone.SOLUTION: A production method of a polyester, which includes: an esterification and/or ester exchange reaction step of reacting an aliphatic diol component, an aliphatic dicarboxylic acid component and an aromatic dicarboxylic acid component; a pelletizing step of pelletizing a polyester obtained via the esterification and/or the ester exchange reaction step; and a contact treatment step of contacting a polyester pellet that is obtained by the pelletizing step and has a tetrahydrofuran content of 10 mass ppm or higher and a mixed liquid containing ethanol and water, in which the mixed liquid contains 10 mass% or larger and 99 mass% or smaller relative to an entirety of the mixed liquid.SELECTED DRAWING: Figure 3
Inventors:
MORI YOSHIAKI
TAKAHASHI TAKESHI
TAKAHASHI TAKESHI
Application Number:
JP2017038465A
Publication Date:
September 20, 2018
Filing Date:
March 01, 2017
Export Citation:
Assignee:
MITSUBISHI CHEM CORP
International Classes:
C08G63/90; C08G63/181
Domestic Patent References:
| JP2012092310A | 2012-05-17 | |||
| JP2015530435A | 2015-10-15 | |||
| JPS60240725A | 1985-11-29 | |||
| JP2003012781A | 2003-01-15 | |||
| JP2010195989A | 2010-09-09 | |||
| JPH07316276A | 1995-12-05 |
Foreign References:
| US20130211037A1 | 2013-08-15 | |||
| US20150183927A1 | 2015-07-02 | |||
| WO2006115226A1 | 2006-11-02 | |||
| US20090171037A1 | 2009-07-02 |
Attorney, Agent or Firm:
Tsuyoshi Shigeno
Takayuki Shigeno
Takayuki Shigeno