Polymer for contact lens and contact lens made thereof
US4235985A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1978 |
| Grant date | Nov 25, 1980 |
| Priority date | — |
| Expiry date | Sep 22, 1998 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29D11/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymerization product suitable for contact lenses comprising (a) an organosiloxane monomer having the following general formula ##STR1## wherein n is an integer of 1 to 3, X is --(CH.sub.2).sub.p --O].sub.q in which p is an integer of 2 to 4 and q is 0 or an integer of 1 to 3, and Y.sup.1, Y.sup.2 and Y.sup.3 are methyl group or --O--Si--(CH.sub.3).sub.3, and (b) a hydrophobic methacrylic acid alkyl ester monomer. The polymerization product and cross-linked polymerization product have excellent oxygen permeability and proper hydrophilic property and are substantially water-nonabsorptive, and contact lenses made thereof can be comfortably worn continuously for a long period of time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.