Crosslinked polymers containing salt structures
US5939489A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Sep 12, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to a process for the production of moldings, in particular contact lenses, in which a water-soluble crosslinkable polymer is crosslinked in solution, and to moldings, in particular contact lenses, obtainable by this process. The present invention likewise relates to novel crosslinkable polymers comprising units containing a crosslinkable group, units containing an acidic group and/or units containing a basic group which can be employed in the novel process, in particular derivatives of a polyvinyl alcohol having a molecular weight of at least about 2000, and to crosslinked polymers, either homopolymers or copolymers, made from these novel crosslinkable polymers, a process for the preparation of the novel crosslinkable polymers and the homopolymers and copolymers obtainable therefrom, to moldings made from said homopolymers or copolymers, in particular contact lenses made from these homopolymers or copolymers, and to a process for the production of contact lenses using said homopolymers or copolymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.