PEG-POE, PEG-POE-PEG, and POE-PEG-POE block copolymers
US5939453A · kind A · utility
88Cited by
14References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 4, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Jun 4, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
PEG-POE, PEG-POE-PEG, and POE-PEG-POE block copolymers have both hydrophilic and hydrophobic blocks. They form micelles in aqueous solution, making them suitable for encapsulation or solubilization of hydrophobic or water-insoluble materials; and they also form bioerodible matrices for the sustained release of active agents, especially when the POE block(s) contain at least one unit containing an .alpha.-hydroxy acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.