Title:
METHOD FOR PRODUCING BIODEGRADABLE ALIPHATIC POLYESTER
Document Type and Number:
Japanese Patent JP2013082758
Kind Code:
A
Abstract:
To provide a method for producing a biodegradable aliphatic polyester, which avoids blocking by coalescence of pellets in drying.
The method for producing a biodegradable aliphatic polyester includes: a crystallization step (S03) of heating and crystallizing a pellet 11 of a biodegradable aliphatic polyester that contains remaining monomers and has amorphous parts at a first predetermined temperature; and a drying step (S05) of drying the pellet 11 at a second predetermined temperature higher than the first predetermined temperature, wherein the first predetermined temperature is the glass transition temperature or higher and the melting point -40°C or lower.
Inventors:
KUMAKURA SHIGERU
SATO HIROYUKI
SAIJO HIKARU
YOSHIDA KATSUMI
SATO HIROYUKI
SAIJO HIKARU
YOSHIDA KATSUMI
Application Number:
JP2011221423A
Publication Date:
May 09, 2013
Filing Date:
October 05, 2011
Export Citation:
Assignee:
KUREHA CORP
International Classes:
C08G63/88; C08L101/16
Domestic Patent References:
| JP2008101030A | 2008-05-01 | |||
| JP2008150617A | 2008-07-03 | |||
| JP2010209321A | 2010-09-24 | |||
| JPH0995531A | 1997-04-08 |
Foreign References:
| WO2007049721A1 | 2007-05-03 | |||
| WO2006082862A1 | 2006-08-10 |
Attorney, Agent or Firm:
Sadaji Miyakawa
Kayoko Miyoko
Shigeo Shibata
Toshiyuki Kanai
Kayoko Miyoko
Shigeo Shibata
Toshiyuki Kanai