Interaction control of cationic biocides using labile anionic polyelectrolytes
US9040510B2 · kind B2 · utility
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19References
16Claims
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Key dates
| Filing date | Mar 25, 2009 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Oct 25, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L12/145
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods of inhibiting the uptake of cationic biocides into medical devices such as contact lenses and implants are described. Methods of stabilizing emulsions containing cationic biocides are also described. In particular, the present invention provides for the use of polymers acting as labile anionic polyelectrolytes to reversibly bind cationic biocides. The reversible binding can reduce the deleterious effects of cationic biocides while maintaining biocidal activity. Preferred polymers include galactomannan and polyvinyl alcohol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.