Cellulose derivative and method for production thereof
US8455001B2 · kind B2 · utility
15Cited by
2References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2008 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Aug 15, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B11/145
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention provides a cellulose derivative having a repeating unit of the formula below, a composition including the cellulose derivative and a phospholipid, a method for production thereof, and an adhesion barrier including the cellulose derivative or the composition.In the formula, R1, R2, and R3 are —H, —CH2—COOH, —CH2—COOX, or —CH2CO-phosphatidylethanolamine, and X is an alkali metal or an alkali earth metal. The degree of substitution of —CH2—COOH and —CH2—COOX is 0.3 to 2.0 in total, and the degree of substitution of —CH2CO-phosphatidylethanolamine is 0.001 to 0.05.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.