Thermochromic liquid crystal materials and devices
US4741859A · kind A · utility
14Cited by
15References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1986 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jun 18, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/44
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel method of preparing thermochromic liquid crystal mixtures is provided in which mixtures which show an injected smectic phase at lower temperatures than their thermochromic cholesteric phase are prepared, and by following the envelope of the injected smectic - cholesteric transition on the phase diagram a series of thermochromic compositions containing the same components but having a series of working temperature ranges are obtained. Novel thermochromic liquid crystal mixtures prepared using the method are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.