Ferroelectric liquid crystal compositions chiral haloalkoxy tail units
US5167855A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1990 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Jul 20, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/588
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The subject application discloses chiral nonracemic compositions of the general formula: EQU R.sub.1 --(Ar)--O--C*H(CH.sub.3)--C*HX--C*HY--R.sub.2 wherein: R.sub.1 is an achiral tail of two to sixteen carbons; Ar is an achiral FLC core of at least two rings; * denotes a chiral or potentially chiral carbon; X is a halide and Y is H or a halide; R.sub.2 comprises the distal segment of the chiral tail and has one to ten carbon atoms; the --O--C*H(CH.sub.3)--C*HY--C*HY--CH.sub.2 --O-- segment comprises the chiral proximal segment of the chiral tail, and the proximal segment is selected from the diastereomers and enantiomers: PA0 1S-methyl-2S-halo PA0 1S-methyl-2R-halo PA0 1R-methyl-2R,3R-dihalo PA0 1R-methyl-2R,3S-dihalo PA0 1R-methyl-2S,3S-dihalo PA0 1R-methyl-2S,3R-dihalo PA0 1R-methyl-2R-halo PA0 1R-methyl-2S-halo PA0 1S-methyl-2S,3S-dihalo PA0 1S-methyl-2S,3R-dihalo PA0 1S-methyl-2R,3R-dihalo PA0 1S-methyl-2R,3S-dihalo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.