Polymer compositions for contact lenses
US5236969A · kind A · utility
65Cited by
12References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Jun 15, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Branched alkylhydroxycycloalkyl methacrylate monomers, such as t-butylhydroxycyclohexyl methacrylate, are polymerized with hydrophilic monomers and crosslinking agents to produce compositions for shaped biomedical devices, including soft contact lenses. Such copolymers have high oxygen permeability and good mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.