Polymer-dispersed liquid crystal material and process

Details Polymer-dispersed liquid crystal material and process Polymer-dispersed liquid crystal material and process

1995-11-21

2000-03-14

Kelly, C. H.

Compositions

Liquid crystal compositions

252582, C09K 1952, F21V 900

Patent

active

060368829

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.

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West, J., "Polymer-Dispersed Liquid Crystals", American Chemical Society 435:475-495 (1990).

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