Title:
結晶性ポリグリコール酸、ポリグリコール酸組成物、及びこれらの製造方法
Document Type and Number:
Japanese Patent JP4704456
Kind Code:
B2
Abstract:
Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc 2 is not lower than 35°C, and a difference between the crystallization temperature Tc 1 and the glass transition temperature Tg is not lower than 40°C. A production process of polyglycolic acid modified in crystallinity, comprising applying heat history to crystalline polyglycolic acid at a temperature of not lower than (the melting point Tm of the crystalline polyglycolic acid + 38°C). A polyglycolic acid composition comprising crystalline polyglycolic acid and a heat stabilizer, wherein a difference (T 2 - T 1 ) between the temperature T 2 at 3%-weight loss on heating of the polyglycolic acid composition and the temperature T 1 at 3%-weight loss on heating of the crystalline polyglycolic acid is not lower than 5°C.
Inventors:
Kazuyuki Yamane
Hiromitsu Miura
Toshihiko Ono
Nakajima Junji
Daisuke Ito
Hiromitsu Miura
Toshihiko Ono
Nakajima Junji
Daisuke Ito
Application Number:
JP2008249936A
Publication Date:
June 15, 2011
Filing Date:
September 29, 2008
Export Citation:
Assignee:
Kureha Co., Ltd.
International Classes:
C08G63/08; B29C49/00; B65D1/02; C07C59/10; C08G63/80; C08G63/88; C08K5/00; C08K5/49; C08K5/527; C08L67/04; C08L101/16
Domestic Patent References:
| JP10337772A | ||||
| JP10060136A | ||||
| JP10060137A | ||||
| JP10072529A |
Attorney, Agent or Firm:
Naoto Noda