Nippon Kayaku Kabushiki Kaisha

Hitomi Muto

Saori Suzuki

Kohei Ohtani

Yu Hattori

Kanae Ogawa

Masakazu Shiraishi

Takashi Yoshimoto

Taku Iino

Shinya Nagatsuka

Liquid-crystal composition comprising (A) dye compounds and (B) a liquid crystal material, wherein the dye compounds (A) include an anthraquinone compound represented by general formula (1) and an anthraquinone compound represented by general formula (2) in a specific proportion and further include a dye compound which is neither the anthraquinone compound represented by general formula (1) nor the anthraquinone compound represented by general formula (2), The liquid-crystal composition also may include the (A) and (B) components and further containing (C) a photocurable compound and (D) a photopolymerization initiator A cured object obtained from the liquid-crystal composition, and a light-modulating element in which the liquid-crystal composition or the cured object is sandwiched therein are also set forth.

Liquid-crystal composition containing anthraquinone compound and light-modulating element

An anthraquinone compound represented by formula (1) (In the formula, Rand Rrepresent a hydrogen atom, a C1-12 alkyl group, a C1-12 alkoxy group, a halogen atom, —COR, —OCOR, —COR, a cyano group, or a trifluoromethyl group. R, R, R, and Rrepresent a hydrogen atom, a C1-4 alkyl group, a C1-4 alkoxy group, a halogen atom, —COR, —OCOR, —COR, a cyano group, or a trifluoromethyl group, Rand Rrepresent a hydrogen atom or a C1-8 alkyl group. Rrepresents a C1-12 alkyl group, a substituent represented by formula (a) (in the formula, Rrepresents a hydrogen atom, a C1-8 alkyl group, or a C1-8 alkoxy group), or a substituent represented by formula (b) (in the formula, Rrepresents a hydrogen atom or a C1-8 alkyl group)).

Anthraquinone compound, liquid crystal composition containing said compound, and light-controlling element

An anthraquinone compound represented by formula (1): (where Rand Rrepresent —H, a C1-C12 alkyl group, a C1-C12 alkyl group, a halogen atom, —COR, —OCOR, —COR, a cyano group, or —CF, R, R, Rand Rrepresent —H, a C1-C4 alkyl group, a C1-C4 alkoxy group, a halogen atom, —COR, —OCOR, —COR, a cyano group, or —CF. Rand Rrepresent —H, a C1-C12 alkyl group, or a C1-C12 alkoxy group. Rrepresents a C1-C12 alkyl group, or a substituent represented by formula (a) (where Rrepresents —H, a C1-C8 alkyl group, or a C1-C8 alkoxy group) or formula (b) (where Rrepresents —H or a C1-C8 alkyl group); however, at least one of Rthrough Rrepresents a halogen atom, —COR, —COR, a cyano group, or —CF).

Anthraquinone compound, liquid crystal composition containing said compound, and dimming element

The present invention is an anthraquinone compound represented by formula (1) (in the formula. Rrepresents a hydrogen atom, a C1-C12 linear or branched alkyl group, or a C1-C12 linear or branched alkoxy group, and Rrepresents a substituent represented by: formula (a) (in formula (a), Rrepresents a hydrogen atom, a C1-C8 linear or branched alkyl group, a C1-C8 linear or branched alkoxy group, or a substituent represented by —CHOR, where Rrepresents a C1-C8 linear or branched alkyl group); or formula (b) (in formula (b). Rrepresents a hydrogen atom, a C1-C8 linear or branched alkyl group, or a substituent represented by —CHOR, where Rrepresents a C1-C8 linear or branched alkyl group)).

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 Rrepresents a C3-16 branched alkyl group, and Rrepresents 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.

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.

Anthraquinone compound, liquid crystal composition for dimming including said compound, and dimming element

A compound represented by formula (1) or a salt thereof, and an ink including the same. In formula (1), each Q independently represents a halogen atom; Rand Rindependently represent an alkyl group substituted by an ionic hydrophilic group; and Arepresents a C1-C3 alkoxy-substituted alkylamino group 

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Tokyo, Japan

Hitomi Muto