P-terphenyl derivatives and liquid crystalline compositions
US5494605A · kind A · utility
11Cited by
7References
4Claims
0Family size
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Key dates
| Filing date | Nov 24, 1993 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Nov 24, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/123
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The p-terphenyl derivatives of the formula shown below are useful in preparing practical ferroelectric liquid crystalline compositions. The derivatives exhibit excellent chemical stability and display the chiral smectic C or smectic C phase over a wide temperature range. ##STR1## wherein each of R.sub.1 and R.sub.2 is a straight or branched chain alkyl group having 1-18 carbon atoms; each of Y and Z is a single bond, O, COO or OCO; and any two of X.sub.1, X.sub.2, and X.sub.3 are fluorine atoms and the remainder is a hydrogen atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.