Fluoro tolans and liquid crystalline media
US5356562A · kind A · utility
12Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1992 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Jun 3, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2601/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Fluoro tolans of the formula I ##STR1## wherein R.sup.1 denotes alkyl with up to 12 carbon atoms wherein one or two non-adjacent CH.sub.2 groups may also be replaced by --O--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, PA1 A is trans-1,4-cyclohexylene or 1,4-phenylene, PA1 r is 0 or 1, PA1 s is 0 or 1, PA1 Q is --CF.sub.2 -- or --OCF.sub.2 -- and -- if Y=F and/or L.sup.1 =L.sup.2 =F - also a single bond, PA1 L.sup.1 and L.sup.2 are H or F, and PA1 Y is H, F or Cl are suitable as components of liquid crystalline media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.