Compositions – Liquid crystal compositions
Patent
1990-06-29
1993-05-18
Stoll, Robert L.
Compositions
Liquid crystal compositions
C09K 1952, C09K 1900, F21V 900, G02F 113
Patent
active
052118762
ABSTRACT:
Liquid crystal films are potentially useful for automotive displays and for automotive windows and sunroofs with variable optical transmission. The present invention provides a liquid crystal material having an extended wavelength response and a method for making the same. The size of the liquid crystal microdroplets within the material are controlled such that a polydisperse liquid crystal film is formed. Controlling the curing parameters during the cure of a supersaturated mixture of liquid crystal in polymer precursor allows for the fabrication of a polymer-dispersed liquid crystal material containing a multimodal distribution of microdroplet sizes which provides a film acting as both as a visible light shutter and a strong scattered of infrared radiation.
REFERENCES:
patent: 4673255 (1987-06-01), West et al.
patent: 4685771 (1987-08-01), West et al.
patent: 4728547 (1988-03-01), Vaz et al.
patent: 4938568 (1990-07-01), Margenum et al.
patent: 4944576 (1990-07-01), Lacker et al.
Montgomery, Jr. George P.
Smith George W.
Van Steenkiste Thomas H.
Vaz Nuno A.
General Motors Corporation
Hartman Domenica N.
Stoll Robert L.
Wu Shean C.
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