Composition for the manufacture of an ophthalmic lens comprising an encapsulated light-absorbing additive
US11635547B2 · kind B2 · utility
0Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2018 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Oct 31, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to an ophthalmic lens which efficiently absorbs light rays without degradation of the light-absorbing additive, said ophthalmic lens comprising a composite matrix, a catalyst, a UV absorber and at least one light-absorbing additive contained in nanoparticles which are dispersed in said allyl monomer or allyl oligomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.