C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/105
C09K 19/12 (2006.01) C09K 19/20 (2006.01) C09K 19/30 (2006.01) C09K 19/60 (2006.01)
Patent
CA 1207520
ABSTRACT A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye characterised in that the dye comprises at least one anthraquinone compound free from water-solubilising and ionic substituents and having the formula: Image Formula I wherein each of R and R1 independently represents an n-alkyl group having from 4 to 7 carbon atoms inclusive and wherein each of R2 and R3 is independently selected from hydrogen and alkyl groups having from 1 to 4 carbon atoms inclusive.
425319
Harrison Kenneth J.
Newton David F.
Raynes Edward P.
Saunders Frances C.
Thompson David J.
Fetherstonhaugh & Co.
The Secretary Of State For Defence In Her Britannic Majesty's Go
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