Aromatic-based polysiloxane prepolymers and ophthalmic devices produced therefrom
US7279538B2 · kind B2 · utility
37Cited by
8References
9Claims
0Family size
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Key dates
| Filing date | Apr 1, 2005 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | Dec 29, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61L2430/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polysiloxane comprises diaryl, dialkyl, and arylalkyl siloxane units, and further has at least a functional group. Such polysiloxane can be further copolymerized with an additional monomer to produce polymeric compositions suitable for making ophthalmic devices. The additional monomer can be selected to produce desirable properties for ophthalmic applications, such as high refractive index and/or high elongation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.