Polymer, bioabsorbable material and film for preventing tissue fusion
US7491408B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2002 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Apr 27, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/028
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel A1-B-A2 polymer having a number average molecular weight of 10000 to 100000 is provided that has excellent bioabsorbability so as to disappear in a predetermined period of time even when embedded in a large amount in the body, has good kinetic properties, and is useful for preparing tissue anti-adhesion films. This polymer is composed of segments A1 and A2 each having at least either of modified and unmodified amino acid groups, and segment B composed of PEG having a number average molecular weight of 8000 to 50000. The polymer contains both the modified and unmodified amino acid groups, the content of the modified amino acids is 20 to 85 mol % of all the amino acids in the polymer, and segment A1 is bonded to one end of segment B and segment A2 is bonded to the other end of segment B.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.