Lens composition, article and method of manufacture
US4582884A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1984 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Aug 31, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A copolymer composition, especially suited for fabricating optical lenses comprising a copolymer of copolymerized comonomers which include about one to about 25 percent by weight of an acryloxyalkylsilanol; about 0.5 to about 15 percent by weight of a polyacryloxyalkylpolysiloxane; about 5 to about 60 percent by weight of an siloxy substituted ester of acrylic or methacrylic acid; and from about 35 to about 90 percent by weight of an acrylic or methacrylic ester of an alkanol having from one to twenty carbon atoms. Contact lenses and contact lens buttons are formed of such copolymer of copolymerized comonomers by conventional techniques, by injection molding, and by compression molding.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.