C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
31/105, 345/8
C09B 1/32 (2006.01) C09B 1/20 (2006.01) C09B 1/514 (2006.01) C09B 29/00 (2006.01) C09B 29/08 (2006.01) C09B 31/043 (2006.01) C09B 35/35 (2006.01) C09B 56/12 (2006.01) C09K 19/60 (2006.01)
Patent
CA 1140330
ABSTRACT A liquid crystal material includes in solution therewith a pleochroic dye characterised in that the dye is an anthraquinone of general formula: Image (I) where R2 is either hydrogen or a hydroxyl group and where R3 is an anilino or substituted or modified anilino group and where R1 is hydrogen when R2 is a hy- droxyl group and R1 is an anilino or substituted or modified anilino group, preferably the same as R3, when R2 is hydrogen. A large number of alternatives for R3 are disclosed.
313335
Constant Jennifer
Pellatt Martin G.
Roe Iain H.c.
B.d.h. Chemicals Limited
Fetherstonhaugh & Co.
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