Biodegradable oxidized cellulose esters
US7595392B2 · kind B2 · utility
135Cited by
6References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2001 |
| Grant date | Sep 29, 2009 |
| Priority date | — |
| Expiry date | Jan 31, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B15/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to the preparation of a series of oxidized cellulose esters suitable for use as a drug carrier in the development of biodegradable controlled and/or sustained release pharmaceutical, agricultural, and veterinary compositions, such as films, compacts, microspheres, and pellets. The esters are prepared by acylation of oxidized cellulose having at least 3% carboxyl groups. The resulting oxidized cellulose esters are soluble in aqueous alkaline solutions, water, and a variety of organic solvents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.