Coating composition for an optical article, comprising a colloidal suspension of zirconia particles
US9631114B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Dec 27, 2012 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Nov 4, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/14
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A coating composition includes a colloidal suspension of specific zirconia nano-particles, at least one epoxysilane and at least one catalyst. A method for preparing this composition, and its use for coating a transparent optical substrate, an optical article, such as an ophthalmic lens, including a transparent polymer substrate, especially an acrylic substrate, and a coating prepared from the composition, which is directly applied on the substrate, are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.