Abstract:
PROBLEM TO BE SOLVED: To provide an aqueous dispersion of a carbon cluster compound having practically sufficient dispersibility, and a production method thereof.SOLUTION: The production method of an aqueous dispersion of a carbon cluster compound comprises a step of mixing a carbon cluster compound (a) and β-1,3-1,6 glucan (c) in a solution which is adjusted to be alkaline using an amine (b) as an alkali, where β-1,6 bond has a degree of branching of 50 to 100% relative to β-1,3 bond, and a step of neutralizing the mixed solution by adding a neutralizer (d) to the mixed solution.
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystal substance having a high response speed by a liquid crystal composition comprising a new menthol compound used as a chiral agent. SOLUTION: The new menthol ester compound is represented by formula. The liquid crystal composition comprises the menthol compound and the liquid crystal substance. A liquid crystal display device uses the liquid crystal composition. The pitch of the chiral compound can be reduced as compared with that of generally used cholesterol nonanoate without increasing the viscosity of the liquid crystal composition by mixing the chiral compound in the liquid crystal composition. Thereby, the amount of the chiral compound used as a chiral dopant can be reduced as compared with that of the cholesterol nonanoate. Since the D-isomer and L-isomer are present in the menthol, either one of a right-hand twisting chiral compound and a left-hand twisting chiral compound can be synthesized. The chiral compound as the chiral dopant for the liquid crystal composition is useful as an excellent material. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a new magenta color pigment composition which comprises mixed crystals comprising a specific pigment combination, has a good tone and a good color concentration, and can stable be used. SOLUTION: This magenta color pigment comprises the powder of the mixed crystals comprising an auxiliary agent C, and pigments A and B selected from many pigments useful as toners for color printings and color copies. (A) N-(4- nitrophenyl)-4-ä[2-methoxy-5-(phenylamino)carbonyl]phenylazo}-3-hydroxy-2- naphthalenecarboxamide. (B) 4-ä[2-Methoxy-5-(phenylamino) carbonyl]phenylazo}-3-hydroxy-2-naphthalenecarboxamide. (C) A rosin metal salt. Thereby, the new magenta color pigment composition having a good tone and a good color concentration and capable of being stable used can be provided. COPYRIGHT: (C)2004,JPO