Lambda-shaped carbazole and main-chain NLO polyurethane containing the same
US6503998B2 · kind B2 · utility
2Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Sep 5, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Sep 5, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D209/86
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a lambda-shaped carbazole based chromophore, and a main-chain NLO polyurethane containing the same. The lambda-shaped structure reduces the plasticization to the main-chain polymers caused by the chromophore and increases temporal stability of the NLO coefficients of the main-chain NLO polyurethane. The NLO coefficients of the main-chain NLO polyurethane are stable because the efficiency of dipole alignment in electric field is increased due to the dipole thereof being perpendicular to the main chain of the polyurethane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.