Compositions and methods for removing ions from liquid crystal materials
US9562191B2 · kind B2 · utility
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3References
21Claims
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Key dates
| Filing date | Apr 1, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Apr 1, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/525
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Liquid crystal compositions comprising a crude liquid crystal sample containing ions and polyamide particles are disclosed. Upon separation of the polyamide particles from the crude liquid crystal sample, a purified liquid crystal sample is produced, which shows a 1-2× reduction in ion concentration. Methods for carrying out purification processes are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.