Polyacryloxyalkylsilanol lens composition, articles and method of manufacture
US4769431A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1986 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A copolymer composition, especially suited for fabricating optical lenses comprising a copolymer of copolymerized comonomers which include in weight percent about one to about twenty percent by weight of an acryloxyalkylsilanol; about one to about fifteen percent of a polyacryloxyalkylpolysiloxane; about thirty to about seventy five percent of an siloxy substituted ester of acrylic or methacrylic acid; from about one to about 35 percent of an alkyl or cycloalkyl acrylate or methacrylate having from one to twenty carbon atoms; from about one to about twenty percent of a polyol diacrylate; and from about one to about twenty percent of a wetting monomer. 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.