Polymer-dispersed liquid crystal material and process
US5494604A · kind A · utility
16Cited by
0References
1Claims
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Assignee
Inventor
Key dates
| Filing date | Dec 6, 1993 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Dec 6, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/057
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides an improved liquid crystal material comprising a liquid crystal material dispersed in a polymer matrix. The polymeric matrix can be a thermal-based system such as an epoxy-based thermal polymeric system or a UV-curable system such as an acrylate-based polymeric system. The polymeric matrix has a crosslinking density which minimizes the driving voltage while maintaining a good contrast ratio. A process using dynamic mechanical analyzer (DMA) testing identifies a T.sub.g and crosslinking density which are employed to determine the optimum degree of crosslinking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.