Hydrolytically degradable polyester/silicon co-crosslinked matrices
US5169641A · kind A · utility
2Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Mar 6, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyester/silicon co-crosslinked polymer substrates at least partially degradable by hydrolysis, well adopted as matrices for the controlled release of a wide variety of active agents therefrom, are prepared by controlledly co-crosslinking (a) at least one diorganopolysiloxane having at least two hydroxyl groups per molecule and (b) an oligomeric polylactic and/or polyglycolic polyester .alpha.,.omega.-diol, with an effective co-crosslinking amount of (c) an organic polyisocyanate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.