Ferroelectric liquid crystal compositions containing chiral haloalkoxy tails units
US5130048A · kind A · utility
13Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1990 |
| Grant date | Jul 14, 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 a chiral nonracemic composition of the general formula: EQU R.sub.1 --Ar--O--CH.sub.2 --C*HX--C*HY--CH.sub.2 --O--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 carbon; X and Y are halogens; and R.sub.2 is one to ten carbon atoms. The --O--CH.sub.2 --C*HX--C*HY--CH.sub.2 --O-- segment comprises the chiral proximal segment of the chiral tail; the proximal segment is selected from the enantiomers 2R,3R-dihalo and 2S,3S-dihalo. R.sub.2 is the distal segment of the chiral tail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.