Liquid crystalline ester compounds and mixtures thereof
US4834907A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jan 8, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/126
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel chiral smectic liquid crystalline ester compounds having a superior stability and exhibiting a high response rate when used in the form of display elements and chiral smectic mixtures containing at least one of these compounds are provided, which compounds are expressed by the formula ##STR1## wherein n is an integer of 2 to 16; l is 0, 1 or 2; m is 1 or 2 under the condition of l+m.gtoreq.2; X represents methylene group --CH.sub.2 -- or single bond when l is zero, methylene group --CH.sub.2 -- or ether linkage --O-- when l=1 or ether linkage --O-- when l=2; and Y represents R, OR, --COR, --OCOR, --OCOOR or --COOR wherein R throughout represents an alkyl group of 1 to 18 carbon atoms; and asterisk * shows an optically active carbon atom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.