(Thio) (meth) acrylate monomers, intermediate compounds for the synthesis of these monomers, polymerizable compositions and polymers obtained, and their optical and ophthalmic uses
US6472488B2 · kind B2 · utility
3Cited by
1References
30Claims
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Key dates
| Filing date | Sep 20, 2001 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Sep 20, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Polymerizable compositions from novel monomers that correspond to the formula: in which:Z represents H or CH3 and X represents O or S, andY is a 5- to 8-membered heterocycle consisting of hydrogen, carbon and sulphur atoms and at least two endocyclic sulphur atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.