Fluorinated polyimides with fluorene cardo structure as optical materials that have low absolute thermo-optic coefficients
US8668992B2 · kind B2 · utility
3Cited by
8References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2011 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Feb 20, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides new polyimide materials suitable for use in optically transparent fiber composites, ribbon composites, and optical communications applications. The polyimide compounds include monomeric repeat units comprising a fluorinated moiety and a fluorene cardo structure. The polyimides exhibit good optical transparency and have a low absolute thermo-optic coefficient (|dn/dT|).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.