Anisotropic compounds having nematic phase and liquid crystal mixtures
US5047170A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1988 |
| Grant date | Sep 10, 1991 |
| Priority date | — |
| Expiry date | Dec 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3458
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Anisotropic compounds having a nematic phase have the formula ##STR1## wherein A is a cyclic radical selected from the group consisting of ##STR2## Z is selected from the group consisting of a single bond, a --CH.sub.2 CH.sub.2 -- group, a methyleneoxy group and an oxymethylene group, PA0 n is 1 or 2, PA0 p is 0, 1, or 2, PA0 r is 0 or 1, PA0 X is selected from the group consisting of fluorine, chlorine, bromine, iodine, nitrile and methyl, PA0 R.sup.1 and R.sup.2 are selected from the group consisting of hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.1 -C.sub.12 -alkanoyloxy and C.sub.1 -C.sub.12 -alkylamino and cyclic groups of the formulas ##STR3## wherein R.sup.3 through R.sup.6 are selected from the group consisting of hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.1 -C.sub.12 -alkoxy, C.sub.1 -C.sub.12 -alkanoyloxy, and C.sub.1 -C.sub.12 -alkylamino, and Z.sup.2 through Z.sup.6 represent a Z group, with the provisos that: PA1 (A) none of the above aromatic radicals (10), (11), (13), (14) or (15) is directly bonded to the C-atom or a methyleneoxy or oxymethylene group; and PA1 (B) at least one X group is methyl when only one or none of the groups R.sup.1 and R…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.