Dicyano compounds
US4704005A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1983 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Oct 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/34
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently straight-chain C.sub.1 -C.sub.12 -alkyl or when positioned on an aromatic ring R.sup.1 and R.sup.2 may also independently be straight-chain C.sub.1 -C.sub.12 -alkoxy, or one of R.sup.1 and R.sup.2 may also be a group of the formula: ##STR2## X.sup.1 and X.sup.2 are independently single covalent bonds or one of X.sup.1 and X.sup.2 may also be --CH.sub.2 CH.sub.2 --; rings A.sup.1 and A.sup.2 are independently 1,4-phenylene or, when X.sup.1 or X.sup.2 is --CH.sub.2 CH.sub.2 --, rings A.sup.1 and A.sup.2 may also independently be trans-1,4-cyclohexylene; and R.sup.3 is straight-chain C.sub.1 -C.sub.12 -alkyl or when positioned on an aromatic ring R.sup.3 may also be straight-chain C.sub.1 -C.sub.12 -alkoxy. Their manufacture and use in liquid crystalline mixtures are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.