Anisotropic compounds and liquid crystal mixtures
US4514317A · kind A · utility
22Cited by
11References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1983 |
| Grant date | Apr 30, 1985 |
| Priority date | — |
| Expiry date | Jan 25, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/321
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Anisotropic compounds having negative DC anisotropy and improved photochemical stability have the formula (1) given in patent claim 1; none of the benzene rings present in the molecule (1) is bonded directly to two oxygen atoms, as a result of which quinoidal bonding states which reduce the photochemical stability of anisotropic compounds in the case of benzene rings with two lateral nitrile groups are excluded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.