Casting epoxy resin, polythiol and releasing agent to form lens
US5374668A · kind A · utility
64Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Nov 8, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a polysulfide based resin lens, comprising a mixture of at least one epoxy resin having at least two epoxy groups, and at least one polythiol compound having at least two mercaptan groups, and at least one internal release agent, which is cast polymerized, and the process for preparing the same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.