Polymer blends having reverse phase morphology for controlled delivery of bioactive agents
US4795641A · kind A · utility
69Cited by
11References
40Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 20, 1987 |
| Grant date | Jan 3, 1989 |
| Priority date | — |
| Expiry date | Aug 20, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L1/14
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed are polymer blends containing a minor amount of cellulose acetate and a major amount of cellulose acetate phthalate, cellulose acetate trimellitate or cellulose acetate succinate. The blends have reverse phase morphology, that is, the minor component forms a continuous phase. The blends are useful for zero-order controlled delivery of bioactive agents such as pharmaceutical and agricultural chemicals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.