High index/high Abbe number composition
US5977276A · kind A · utility
24Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Nov 20, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F222/104
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A cross-linkable polymeric casting composition including an effective amount of PA1 A: an acrylic or methacrylic monomer which provides high rigidity and low colour dispersion (High Abbe number) to the final product; PA1 B: a di- or polythio compound; PA1 C: a di- or polyvinyl monomer; and optionally PA1 D: a polymerisable comonomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.