Segmented absorbable copolymer
US5252701A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1990 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Jul 6, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/64
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A copolymer comprising a bioabsorbable, segmented molecular architecture has been invented. The copolymer has at least two different ester linkages. The segmented molecular architecture comprises a plurality of fast transesterifying linkages. The fast transesterifying linkages have a segment length distribution of greater than 1.3. The segmented molecular architecture also comprises a plurality of slow transesterifying linkages. The following proviso is a material limitation to this invention: for the fast transesterifying linkages consisting essentially of glycolate linkages and the slow transesterifying linkages selected from the group consisting of trimethylene carbonate and caproate linkages, the segment length distribution of the fast transesterifying linkages is up to 2.0 and the number average segment length of the slow transesterifying linkages is greater than 2.5 linkages per segment. The copolymer is useful as an article of manufacture, for example a molding resin, surgical element and controlled release device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.