Ferroelectric liquid crystal compounds and compositions
US5178793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1989 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Jun 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3411
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Chiral, nonracemic compounds of the general formula: ##STR1## in which the chiral tail group containing three asymmetric carbons (as indicated by *) is incorporated into a suitable FLC core moiety R--Ar.sub.2 are provided. The Ar.sub.2 core can include phenylbenzoate, biphenyl, phenylpyridine or phenylpyrimidine. R is an alkyl or alkoxy group having three to fifteen carbon atoms and R' is an alkyl group having from three to twelve carbon atoms. The compounds are useful as ferroelectric liquid crystal components having high polarization density. Compounds in which the chiral epoxide tail is the 1R-methyl-2S,3S-epoxy or 1S-methyl-2R,3R-epoxy enantiomer having higher polarization density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.