Balanced charge polymer and hydrophilic contact lens manufactured therefrom
US5391669A · kind A · utility
20Cited by
17References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 9, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Nov 9, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A water swellable crosslinked polymer of essentially balanced charge is obtained by polymerizing a polymer-forming composition comprising a cationic-anionic pair of ethylenically unsaturated monomers and a non-ionic ethylenically unsaturated hydrophilic and/or hydrophobic monomer. Contact lenses formed from the polymer exhibit little if any tendency to attract soils, e.g., proteinaceous debris, to their surfaces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.