Polymer dispersed liquid crystal films having improved optical p

Details Polymer dispersed liquid crystal films having improved optical p Polymer dispersed liquid crystal films having improved optical p

1991-03-12

1993-07-06

Stoll, Robert L.

Compositions

Liquid crystal compositions

2522995, 252582, 428 1, 359 52, 427213, 427508, C09K 1952, C09K 1900, G02F 113, B05D 306

Patent

active

052251047

ABSTRACT:
A film of a polymer dispersed liquid crystal material having improved light scattering and solar attenuation properties, which utilizes a significantly reduced amount of the liquid crystal component as compared to conventional polymer dispersed liquid crystal films, is provided. These improved properties are obtained by the addition of preferably up to about three volume percent of an organic photoaccelerator chosen from the group of amines or aminobenzoates, to the liquid crystal-polymer precursor mixture prior to curing of the mixture.

REFERENCES:
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patent: 5021188 (1991-06-01), Vaz et al.
patent: 5099343 (1992-03-01), Margerum et al.
G. P. Montgomery, Jr., "Polymer-dispersed liquid crystal films for light control applications", Proc. SPIE 1080, p. 242 (1989).
G. W. Smith et al., "The relationship between formation kinetics and microdroplet size of epoxy-based polymer-dispersed liquid crystals", Liq. Cryst. 3, 543 (1988).

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