PH sensitive graft copolymer
US8822605B2 · kind B2 · utility
0Cited by
8References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2010 |
| Grant date | Sep 2, 2014 |
| Priority date | — |
| Expiry date | Sep 24, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F283/01
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Graft copolymer (P) which exhibit pH dependent swelling/dissolution properties comprising a hydrophobic back-bone and graft chains comprising acidic monomer. This Graft copolymer (P) do not swell or dissolve at acidic pH prevalent in the stomach and they swell/dissolve at near neutral pH prevalent in the intestinal region. The graft copolymer (P) is useful for the development of drug delivery formulations particularly for oral drug delivery formulations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.