Non-hydrous soft contact lens and process for producing the same
US4882403A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 27, 1988 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F220/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A non-hydrous soft contact lens comprising a copolymer comprising, as monomer units: PA0 (a) from 33.9 to 89 mol % of an acrylate represented by the general formula (I) shown below; PA0 (b) from 4.9 to 65 mol % of a methacrylate represented by the general formula (II) shown below; PA0 (c) from 1 to 20 mol % of at least one selected from an unsaturated carboxylic acid and its particular esters; PA0 (d) from 0 to 20 mol % of a particular acrylic acid ester having a straight chain alkyl or fluoroalkyl group; PA0 (e) from 0 to 20 mol % of a methacrylic acid ester having a straight-chain alkyl group; PA0 (f) from 0.1 to 10 mol % of a crosslinking monomer. General formula (I): ##STR1## wherein R.sub.1 is a particular straight-chain alkyl or fluoroalkyl group. General formula (II): ##STR2## wherein R.sub.2 is a particular straight-chain fluoroalkyl group; and a process for preparing the same. This contact lens has good oxygen permeability, mechanical strength, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.