Title:
生分解性を有するブロック共重合体
Document Type and Number:
Japanese Patent JP7218720
Kind Code:
B2
Abstract:
An object of the present invention is to provide a biodegradable block copolymer having high conformability and excellent degradability. The present invention provides a block copolymer including a polyalkylene glycol block and a polyhydroxyalkanoic acid block, wherein the mass ratio of the polyalkylene glycol block with respect to the total mass is 10 to 60%; the carbonyl carbon has a carbon nuclear relaxation time T1ρ of not more than 20 ms; and the block copolymer satisfies the following Equation 1: χ=χ1×χ2≥20 [χ1: crystallization rate of the polyalkylene glycol block; χ2: crystallization rate of a poly-A block, wherein A represents, among the repeat units contained in the polyhydroxyalkanoic acid block, a repeat unit whose homopolymer composed of the same repeat units has a highest crystallization rate].
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Inventors:
Taisuke Furukawa
Masanori Fujita
Yuuichi Koyamatsu
Kazuhiro Tanahashi
Kidoba Kazushi
Masanori Fujita
Yuuichi Koyamatsu
Kazuhiro Tanahashi
Kidoba Kazushi
Application Number:
JP2019504997A
Publication Date:
February 07, 2023
Filing Date:
January 25, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
C08G81/00; A61L15/26; A61L15/42; A61L17/12; A61L17/14; A61L27/18; A61L27/34; A61L27/40; A61L27/50; A61L27/58; C08L101/16
Domestic Patent References:
| JP1195862A | ||||
| JP2001261838A | ||||
| JP4822222B2 | ||||
| JP5209192B2 | ||||
| JP6094219B2 | ||||
| JP2017141477A |
Foreign References:
| WO2012077776A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Tanikawa International Patent Office