Light valve suspension materials

Details Light valve suspension materials Light valve suspension materials

G - Physics

02

B

31/164, 345/56

G02B 5/23 (2006.01)

Patent

CA 1106954

Abstract of the Disclosure A light valve including suspending materials which have an ability to prevent or substantially retard agglomeration of the particles in suspen- sion during the application of a voltage to the suspension. The materials include aromatic esters which are derivable from aromatic alcohols such as phenyl acetate, cresyl acetate, para-butylphenyl acetate, paranonylphenyl acetate, and structurally similar compounds. The suspension also includes, as an additional suspending material, a polymer such as a branched polymeric coating material to coat the particles in suspension and act in combination with the aromatic ester suspending materials to prevent or substantially reduce agglomeration of the particles when a voltage is app?ied to the suspension Other suspending materials such as non-aqueous liquids or solids may also form part of the suspending medium of this invention.

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