The present invention relates to an anthraquinone compound represented by formula (1) (in formula (1), R1 represents a C 1-9 alkyl group and R2 represents a C 1-8 alkyl group.); a yellow dichroic pigment that includes this compound: a liquid crystal composition for light control that contains this yellow dichroic pigment and a liquid crystal material: and a light control element that uses this composition.

##STR00001##

The present invention relates to a colorant mixture comprising (A) at least one blue- or black-dyeing disperse dye of formula ##STR00001## wherein R.sub.1 denotes hydrogen or halogen, R.sub.2 and R.sub.3 are each independently of the other hydrogen; C.sub.1-C.sub.8-alkyl which is unsubstituted or substituted with hydroxy, cyano, C.sub.1-C.sub.4alkoxy or halogen; —(CH.sub.2).sub.n—O—(CH.sub.2).sub.mR.sub.4, wherein R.sub.4 denotes hydrogen or C.sub.1-C.sub.8-alkyl, n is a number from 2 to 6 and m is a number from 0 to 6; C.sub.5-C.sub.24aryl which is unsubstituted or substituted with hydroxy, carboxy, cyano, C.sub.1-C.sub.8alkyl, C.sub.1-C.sub.4alkoxy or halogen; or C.sub.6-C.sub.30aralkyl which is unsubstituted or substituted with hydroxy, cyano, C.sub.1-C.sub.4alkyl, C.sub.1-C.sub.8alkoxy groups or halogen; and (B) at least one yellow-, orange- or red-dyeing disperse dye, solvent dye, vat dye or pigment; and to the use thereof in dyeing or printing cellulose or cellulose blend fibre materials.

The present invention relates to a colorant mixture comprising

(A) at least one blue- or black-dyeing disperse dye of formula

##STR00001## wherein R.sub.1 denotes hydrogen or halogen, R.sub.2 and R.sub.3 are each independently of the other hydrogen; C.sub.1-C.sub.8-alkyl which is unsubstituted or substituted with hydroxy, cyano, C.sub.1-C.sub.4alkoxy or halogen; —(CH.sub.2).sub.n—O—(CH.sub.2).sub.mR.sub.4, wherein R.sub.4 denotes hydrogen or C.sub.1-C.sub.8-alkyl, n is a number from 2 to 6 and m is a number from 0 to 6; C.sub.5-C.sub.24aryl which is unsubstituted or substituted with hydroxy, carboxy, cyano, C.sub.1-C.sub.8alkyl, C.sub.1-C.sub.4alkoxy or halogen; or C.sub.6-C.sub.30aralkyl which is unsubstituted or substituted with hydroxy, cyano, C.sub.1-C.sub.4alkyl, C.sub.1-C.sub.8alkoxy groups or halogen; and

(B) at least one yellow-, orange- or red-dyeing disperse dye, solvent dye, vat dye or pigment; and to the use thereof in dyeing or printing cellulose or cellulose blend fibre materials.

The present invention relates to an anthraquinone compound represented by formula (1) (in formula (1), R1 represents a C1-9 alkyl group and R2 represents a C1-8 alkyl group): a yellow dichroic pigment that includes this compound; a liquid crystal composition for light control that contains this yellow dichroic pigment and a liquid crystal material; and a light control element that uses this composition. ##STR00001##

New dichroic dyes having a composition with slave materials. The dyes may be used for a dichroic polymer network, a dichroic liquid crystalline polymer film (LCP film) or a dichroic liquid crystalline polymer gel, which for instance find application as electro-optical or optical devices.

The purpose of the present invention is to provide a novel anthraquinone compound, and to provide: a dichroic dye constituted of the novel anthraquinone compound; a liquid crystal composition which contains the dichroic dye; and preferably a dimming element having excellent contrast and light resistance and containing said composition. The present invention discloses an anthraquinone compound represented by formula A below (wherein R.sub.1 represents a C3-16 branched alkyl group, and R.sub.2 represents a hydrogen atom, a C1-8 straight-chain or branched alkyl group, or a C1-8 straight-chain or branched alkoxy group). In addition, the present invention discloses a liquid crystal composition including the anthraquinone compound and a liquid crystal material, and a dimming element containing said composition.

##STR00001##

The purpose of the present invention is to provide a novel anthraquinone compound, and to provide: a dichroic dye constituted of the novel anthraquinone compound; a liquid crystal composition which contains the dichroic dye; and preferably a dimming element having excellent contrast and light resistance and containing said composition. The present invention discloses an anthraquinone compound represented by formula A below (wherein R.sub.1 represents a C3-16 branched alkyl group, and R.sub.2 represents a hydrogen atom, a C1-8 straight-chain or branched alkyl group, or a C1-8 straight-chain or branched alkoxy group). In addition, the present invention discloses a liquid crystal composition including the anthraquinone compound and a liquid crystal material, and a dimming element containing said composition. ##STR00001##

The present disclosure relates generally to multimeric dyes, colored dielectric polymer materials, methods of making them and uses thereof. In particular, the application concerns a colored dielectric polymer material comprising a multimeric dye with structure

##STR00001##

wherein each D is independently a chromophoric unit; each L is independently absent or is a linking group comprising no more than 10 atoms in length as measured in the shortest path from D to A; A is a bridging group; and n is an integer in the range of 1 to 3.

New dichroic dyes having a composition with slave materials. The dyes may be used for a dichroic polymer network, a dichroic liquid crystalline polymer film (LCP film) or a dichroic liquid crystalline polymer gel, which for instance find application as electro-optical or optical devices.