Polyurea/urethane optical material and method for making it
US6939939B2 · kind B2 · utility
45Cited by
11References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2003 |
| Grant date | Sep 6, 2005 |
| Priority date | — |
| Expiry date | Aug 3, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/041
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyurea/urethane material and method for making it provides for improved optical parts. The material allows for ease of manufacture of parts having good optical properties, high hardness, low density, and good impact resistance. The method provides for related manufacturing advantages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.