Copolymer for contact lens, its preparation and contact lens made thereof
US4139692A · kind A · utility
123Cited by
4References
11Claims
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 C)Chemistry; Metallurgy
- CPC primaryC07F7/0889
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A copolymer suitable for use as 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, (c) a methacrylic acid alkyl ester and (d) a cross-linking agent having at least two copolymerizable functional groups. Contact lenses made of the above copolymer has excellent oxygen permeability 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.