C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
31/105, 260/236,
C09B 1/02 (2006.01) C09B 1/42 (2006.01) C09K 3/34 (1980.01)
Patent
CA 1183532
EASED THEREON Abstract The present invention relates to anthraquinono deriva- tives of the general formula (I): (I) Image wherein A, M, B, Z are the same or different substituents having meanings R1DX, R2EY, wherein R1 and R2 are the same or different and represent each a C4-C1 a alkyl, Image X, Y are the same or different and represent each oxygen or a group NH, NR3; E is an ordinary bond, Image Y + E + R2 = H, Cl, Br, NO2, NR3R4, wherein R3 is a C1-C18 alkyl, R4 is H or C4H9, or R3 + R4 = ? CH2 ?5; n = 0 or1,m , 0, 1, 2, excluding compounds, wherein A = M = B = Z = H, Cl, Br, NO2, NR3R4. These compounds are prepared by acylation of anthraqui- none derivatives of the general formula (II): (II) Image whercin W, T, L, K are the same and/or different substitu- ents representing each NH2, NHR3, OH, H, Cl, Br, NO2, NR3R4, wherein: R3 is a C1-C8 alkyl, R4 is hydrogen or C4H9, R3 + R4 = ? CH2 ?5, by means of acid chlorides of the general formula (III): R1DCl (III) wherein R1 and D are as identified in formula (I). The compounds corresponding to the above-given formula (I) are dyestuffs with negative dichroism which are incor- ported into a composition of a liquid-crystal material. The liquid-crystal material comprises a liquid-crystal mat- rix and at least one derivative or anthraquinone of the above-given formula (I). This liquid crystal material is used in an electrooptical device as a dichroic working body positioned between optically transparent plates having, on their inner sides, transparent electrodes provided with conductors for connection to a power supply source. - 2 -
414497
Blinov Lev M.
Ivaschenko Alexandr V.
Lazareva Valentina T.
Rumyantsev Vladimir G.
Titov Viktor V.
Blinov Lev M.
Ivaschenko Alexandr V.
Lazareva Valentina T.
Rumyantsev Vladimir G.
Swabey Ogilvy Renault
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