Mitsubishi Chemical Corporation

Sony Corporation

Yasushi Shiga

Mio Ishida

Yuki Tanaka

Masami Kadowaki

Utako Takeda

Mitsuya Aoba

Kazuhiro Tanaka

Keita Kaifu

Yukihiro Sano

Seiji Akiyama

Shoko Ichinosawa

Junichi Oizumi

Yoshie Takami

Souya Kojima

Terutsune Osawa

Tomoko Kadowaki

Kei Takeshita

A compound of formula (1) or (11):X-A-(N═N-A)-N═N-A-Y  (1)X-A-(N═N-A)-N═N-A-Y  (11),

Compound, composition for anisotropic dye films including the compound, anisotropic dye film, and optical element

An azo compound excellent in solubility in solvent and having a high absorbance coefficient is disclosed, as well as an ink containing the azo compound. Such an ink contains a solvent having a relative permittivity at 22&#xb0; C. and at a measurement frequency of 1 kHz of 3 or less and having a solubility in water at 25&#xb0; C. of 20 mg/L or less, and an azo compound.

Azo compound, ink containing azo compound, and display and electronic paper containing the ink

The present invention relates to an ink comprising: a solvent having a relative permittivity, measured at a frequency of 1 kHz and a temperature of 22&#xb0; C., of 3 or less and a solubility in water at 25&#xb0; C. of 20 mg/L or less; and a specific azo compound.

Azo compound, ink containing azo compound, display including said ink and electronic paper

An object of the present invention is to provide an anthraquinone based dye having excellent solubility in a low polar solvent and having high absorption coefficient and high light resistance and an ink containing the same. The present invention relates to an ink comprising a specific anthraquinone based dye.

Ink containing anthraquinone based dye, dye used in the ink, and display

The invention relates to an ink which comprises: a low-polarity solvent having a relative permittivity of 3 or less at a measuring frequency of 1 kHz; and a specific heterocyclic azo dye.

Ink containing heterocyclic azo dye, and dye for use in said ink

The invention provides a specific pyrazole disazo dye which is a yellow dye having excellent solubility in nonpolar solvents, in particular, hydrocarbon solvents, and having a high extinction coefficient. The dye preferably is preferably a pyrazole disazo dye represented by the following general formula (I): (wherein Rrepresents a C-Calkyl group; Rrepresents a C-Calkyl group; the six-membered ring A represents a phenyl group which may have a substituent; and the six-membered ring B represents a phenylene group which may have a substituent).

Pyrazole disazo dye and ink containing the dye

Provided are a dichroic dye composition in which a solubility of the dichroic dye with respect to liquid-crystal is sufficiently high and a wavelength dispersion of absorbance is small in a wide wavelength range, and a black guest-host liquid-crystal composition indicating high order parameters using such a dichroic dye composition and a liquid-crystal element having high contrast. The dichroic dye composition includes at least one dichroic dye selected from Group (I) shown below, at least one dichroic dye selected from Group (II) shown below, and at least one dichroic dye selected from Group (III) shown below. 

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Kanagawa, Japan

Yasushi Shiga