Cellulose acetate phthalate enteric coating compositions
US5888550A · kind A · utility
9Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1997 |
| Grant date | Mar 30, 1999 |
| Priority date | — |
| Expiry date | Mar 3, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08B3/16
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Provided are enteric coating compositions which utilize a low viscosity cellulose acetate phthalate polymer as a film former. The cellulose acetate phthalates have an inherent viscosity of about 0.2 to 0.6 dL/g and phthalyl values of from 30 to 40% and can be applied to solid oral medicaments with less solvent than conventional cellulose acetate phthalate polymers. Also provided is a process for preparing the low viscosity cellulose acetate phthalate polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.