(Thio) (meth) acrylate monomers, intermediate compounds for the synthesis of these monomers, polymerisable compositions and polymers obtained, and their optical and ophthalmic uses
US6307062A · kind A · utility
7Cited by
1References
11Claims
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Key dates
| Filing date | Oct 13, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Oct 13, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The novel monomers correspond to the formula: ##STR1## in which: PA1 Z represents H or CH.sub.3 and X represents O or S, and PA1 Y 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.