Liquid crystal materials with pleochroic dyes

Details Liquid crystal materials with pleochroic dyes Liquid crystal materials with pleochroic dyes

C - Chemistry, Metallurgy

09

B

31/105, 345/8

C09B 1/503 (2006.01) C09B 1/515 (2006.01) C09B 1/54 (2006.01) C09K 19/60 (2006.01)

Patent

CA 1168037

ABSTRACT A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one compound Image Formula (I) wherein one of X and Y is OH and the other is NHR wherein R is H or lower alkyl; each of R1 and R2 independently represents alkyl, aryl, aralkyl, alkoxy or -NR3R4 wherein each of R3 and R4 is independently H or lower alkyl, provided that R2 is always adjacent to an OH group.

382705

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