High refractive index ophthalmic device materials
US7790824B2 · kind B2 · utility
10Cited by
76References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2008 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Sep 12, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L71/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High refractive index copolymers suitable for use in ophthalmic devices are disclosed. The copolymers comprise two or more aryl hydrophobic monomers and a non-polymerizable propylene oxide-ethylene oxide-propylene oxide block copolymer surfactant having a molecular weight of approximately 3600 and approximately 40% ethylene oxide units by weight. The copolymers have a reduced tendency to form glistenings when stored in water at physiological temperatures compared to similar copolymers lacking the non-polymerizable surfactant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.