Medical adhesive and methods of tissue adhesion
US7264823B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2003 |
| Grant date | Sep 4, 2007 |
| Priority date | — |
| Expiry date | Feb 10, 2023 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/771
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
An adhesive including a mixture of isocyanate capped molecules formed by reacting multi-isocyanate functional molecules with multi-functional precursor molecules including terminal functional groups selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group. Preferably, the functional groups are hydroxyl groups. The multi-functional precursor compounds are biocompatible. Multi-amine functional precursors of the multi-isocyanate functional molecules are also biocompatible. As discussed, above, the mixture of molecules preferably has an average isocyanate functionality of at least 2.1 and, more preferably, has an average isocyanate functionality of at least 2.5. As also described above, the mixture of molecules preferably has a viscosity in the range of approximately 1 to approximately 100 centipoise. The mixture of molecules forms a crosslinked polymer network upon contact with the organic tissue in the presence of water. The crosslinked polymer network is biocompatible and biodegradable. The crosslinked polymer network degrades into degradation products including the precursor molecules and the multi-amine functional precursors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.