Composition for optical material
US6960640B2 · kind B2 · utility
2Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2002 |
| Grant date | Nov 1, 2005 |
| Priority date | — |
| Expiry date | Aug 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The composition for optical materials of the present invention comprises a compound having in one molecule at least one structure represented by the following formula (1): wherein R1, R2, R3, R4, X, Y and n are as defined in the disclosure, an amine compound and an isocyanate compound. Resins obtained by curing the composition by polymerization are useful as well-balanced optical materials having a high impact resistance, a high refractive index and a sufficiently high Abbe's number.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.