Plastic lens
US4342863A · kind A · utility
31Cited by
2References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 12, 1981 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Feb 12, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A plastic lens composed of a cured product of a mixture or a reaction produce of (A) a compound containing at least 2 unsaturated cycloacetal groups per molecule, (B) a compound containing at least 2 mercapto groups per molecule and (D) an aliphatic polyvinyl compound selected from the group consisting of ethylene glycol diacrylate, ethylene glycol dimethacrylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol tetraacrylate and dipentaerythritol hexaacrylate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.