Copolymer for soft contact lens, its preparation and soft contact lens made thereof
US4139513A · kind A · utility
148Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1978 |
| Grant date | Feb 13, 1979 |
| Priority date | — |
| Expiry date | Mar 20, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A copolymer suitable for use as soft contact lenses, comprising a polymerization product of (a) at least one monomer selected from methyldi(trimethylsiloxy)sylylpropylglycerol methacrylate and methyldi(trimethylsiloxy)sylylpropylglycerolethyl methacrylate, (b) a hydrophilic monomer and (c) a cross-linking agent having at least two copolymerizable functional groups. Soft contact lens made of the above copolymer has excellent oxygen permeability in spite of low water content and can be comfortably worn continuously for a long term without a foreign body sensation and pain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.