Dilute solutions of lyotropic liquid crystalline polymers, methods of making same and compositions prepared from same
US7497968B2 · kind B2 · utility
1Cited by
2References
36Claims
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Key dates
| Filing date | May 20, 2005 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Jul 10, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249958
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention features dilute solutions of rigid rod or extended rod lyotropic liquid crystalline polymers prepared from high concentration polymerization mixtures. The invention also features methods of preparing such dilute solutions which utilize high mechanical shear to induce mix the high concentration solution with a diluent. The invention further provides articles of manufacture, including films and fibers, having a porous microstructure which are prepared from the dilute homogeneous solutions of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.