Mixtures comprising a nematic liquid crystal and a non-mesomorphic compound
US4789508A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Sep 24, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3068
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a mixture comprising a nematic liquid crystal and a non-mesomorphous compound. The non-mesomorphous compound makes it possible to improve the elastic behavior of the nematic liquid crystal by increasing the value of the ratio K.sub.33 /K.sub.11, in which K.sub.33 represents the elastic bending constant and K.sub.11 the elastic fanning constant of the liquid crystal. The non-mesomorphous compound can be in accordance with the formula: ##STR1## in which R.sup.1 and R.sup.2, which can be the same or different, represent a hydrogen atom or an alkyl radical having 1 to 12 carbon atoms and n is an integer between 2 and 16 and can be associated with liquid crystals or liquid crystal mixtures containing a 1-(alkylcyclohexyl)-2-(alkylfluorobiphenylyl)-ethane. These mixtures can be used as a liquid crystal in a display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.