Lens composition articles and method of manufacture
US4661573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 1986 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | Apr 14, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New copolymer composition, methods for processing the copolymers into optical devices and articles resulting therefrom, especially intraocular and contact lenses having outstanding extended wear and daily wear properties. The composition comprises, in weight percent: from 3% to 35% polyfluoroalkyl acrylate; from 45% to 65% acryloxyalkylpolysiloxane; 1% to 15% acryloxyalkylsilanol; 2% to 20% polyacryloxyalkylpolysiloxane; 2% to 15% polyol polyacrylate and 2% to 15% polymerizable ethylenically unsaturated monomeric wetting agent such as acrylic acid. The composition may also contain 0 to 15% acrylic acid ester of a monohydric alcohol having no more than 20 carbon atoms and from 0.05% to about 2.0% of a free radical initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.