Laterally cyano- and fluoro-substituted terphenyls
US5358663A · kind A · utility
7Cited by
17References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1992 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Sep 18, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/123
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Laterally cyano-substituted terphenyls of formula (I), wherein R.sup.1 and R.sup.2 are independently selected from hydrogen or C.sub.1-15 alkyl, alkoxy, or alkyl or alkoxy in which one or more CH.sub.2 groups are replaced by O, COO, OOC, CHX, CX.sub.2, CH=CX, CX=CH, CX=CX, where X is fluorine or chlorine. CRCN where R is alkyl, or C.tbd.C or in which a terminal CH.sub.3 of the said alkyl or alkoxy chain is replaced by CF.sub.3, n is 0 or 1, and the CN and F (if present) substituent are independently located in any of the available substitution positions. Liquid crystal materials containing these terphenyls are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.