Novel vinyl carbonate and vinyl carbamate contact lens material monomers
US5070215A · kind A · utility
443Cited by
5References
8Claims
0Family size
Assignee
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Key dates
| Filing date | May 2, 1989 |
| Grant date | Dec 3, 1991 |
| Priority date | — |
| Expiry date | May 2, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2603/74
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel monomers of the general formula ##STR1## where b is 0 or 1, a is 1, 2, 3 or 4, R.sup.2 is a monovalent alkyl radical and R is an organic radical. The novel monomers may be employed to produce novel copolymers useful as hydrogel, soft non-hydrogel and/or rigid gas permeable contact lens materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.