Polyoxirane crosslinked polyvinyl alcohol hydrogel contact lens
US4598122A · kind A · utility
13Cited by
12References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1985 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Jan 22, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Optically clear soft contact lenses of a polyoxirane crosslinked polyvinyl alcohol having a weight average molecular weight of at least 8,000 and degree of hydrolysis of at least 93% and their preparation are disclosed. The materials are characterized by their ability to be boiling water sterilized, and their high water content, high oxygen permeability and high optical clarity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.