Solidification retardation of liquid crystalline compositions with steroid derivatives of isostearyl carbonate
US3998860A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1975 |
| Grant date | Dec 21, 1976 |
| Priority date | — |
| Expiry date | Jul 31, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Solidification of liquid crystalline compositions is retarded by incorporating therein compounds which are steroid derivatives of isostearyl carbonate. These novel carbonates which are quite stable to environmental factors such as ultraviolet light exposure, temperature changes, oxidation, etc., retard solidification of liquid crystalline compositions for extended periods of time. Moreover, these compounds, some of which of themselves exhibit color play, can be used in increasing amounts to increasingly narrow the color play range without noticeably decreasing the specular intensity of the color changes of liquid crystalline compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.