TOYOCOLOR CO., LTD.

Provided is a carbon nanotube dispersed liquid which contains carbon nanotubes, a dispersant, and a solvent, and in which, in a volume-based particle size distribution curve measured by a laser diffraction/scattering-type particle size distribution measuring method, particle size distribution peaks are present in a particle size range of 0.1-3 μm and in a particle size range of 10-100 μm, and the cumulative particle size D 50 is 4 μm or more.

A thermoplastic resin composition for an electromagnetic wave absorber includes a thermoplastic resin (A), a carbon nanotube (B) with an average diameter of 1 to 15 nm, and a carbon black (C) with an average primary particle size of 20 to 50 nm, and satisfies any of (i) to (iv). ΔRL expressed by Equation (1) is 3 dB or less, and ΔTL expressed by Equation (2) is 5 dB or less.

An active energy ray-curable inkjet black ink includes carbon black, a basic pigment dispersing resin having an acid value of 30 mgKOH/g or less, and 5-methyl-3-vinyloxazolidin-2-one. When a DBP oil absorption amount of the carbon black is represented by AC (mL/100 g) and a specific surface area of the carbon black is represented by SC (m 2 /g), a value represented by AC×SC is 2,000 to 12,000. A content of a monofunctional polymerizable compound (excluding the 5-methyl-3-vinyloxazolidin-2-one) is 15% by mass or less with respect to a total mass of the active energy ray-curable inkjet black ink.

The purpose of the present invention is to provide a molded body that is for use as a housing and transmits electromagnetic waves such as millimeter waves but is still very dark black, a resin composition that is for use in forming the molded body for a housing and has favorable molding fluidity, and a masterbatch. This molded body for a housing is formed from a resin composition that includes a thermoplastic resin (A) and carbon nanotubes (B). The carbon nanotubes (B) have a specific surface oxygen concentration, diffraction peak half width, and Raman spectrum G/D ratio, the molded body includes 0.10-2 parts by mass of the carbon nanotubes (B) per 100 parts by mass of the thermoplastic resin (A), and the surface resistivity of the molded body is at least 1.0×10 11 Ω/□.

A carbon nanotube dispersion including a carbon nanotube, a solvent, and a dispersant. A highly conductive electrode membrane can be produced as a result of the carbon nanotube using a carbon nanotube dispersion satisfying (1), (2), and (3). (1) An average outer diameter is more than 3 nm and less than 10 nm. (2) A peak is present in a powder X-ray diffraction analysis at a diffraction angle of 2θ=25°±2°, and a half value width of the peak is 3° to 6°. (3) When a maximum peak intensity within the range of 1,560 to 1,600 cm −1 in a Raman spectrum is G and a maximum peak intensity within the range of 1,310 to 1,350 cm −1 is D, a G/D ratio is 0.5 to 4.5.

The pigment composition contains the isoindoline compound represented by formula (1) below and the isoindoline compound represented by formula (2) below. In the formulae (1) and (2), R 1 to R 4 represent hydrogen atoms, R 5 and R 6 each independently represent alkyl groups, and A and A′ represent a group represented by formula (3) below or formula (5) below. In the formula (3) and (5), X represents —O— or —NH—, R 7 represents an alkyl group or an aryl group, and R 10 to R 14 each independently represent hydrogen atoms, halogen atoms, alkyl groups, alkoxy groups, aryl groups, aryloxy groups, thioalkyl groups, or thioaryl groups,

A carbon nanotube dispersion composition includes carbon nanotubes (A), a dispersant (B), and a solvent (C). A particle diameter D 50 at a cumulative volume of 50% according to laser diffraction particle size distribution measurement is 0.3 to 7 μm, and (1) and (2) below are satisfied. (1) The dispersant (B) is a polymer that has a weight average molecular weight of 5,000 or more and 360,000 or less and includes a carboxyl group-containing structural unit derived from at least one of (meth)acrylic acid and (meth)acrylate having a carboxyl group. (2) When the particle diameter D 50 at a cumulative volume of 50% according to laser diffraction particle size distribution measurement of the carbon nanotube dispersion composition is X [μm], and a pH is Y, X and Y satisfy (Formula a) and (Formula b) below: Y ≥ - 0 . 1 ⁢ 4 ⁢ 9 ⁢ X + 4 .545 ( Formula ⁢ a ) Y ≤ - 0 . 1 ⁢ 3 ⁢ 4 ⁢ X + 5 . 1 ⁢ 4 ⁢ 0 . ( Formula ⁢ b )

A dispersion composition production method uses a dispersion device including: a dispersion mechanism dispersing a raw material composition; a supply mechanism equipped with a plunger part and supplying the raw material composition to the dispersion mechanism; and a cooling mechanism cooling the plunger part using a cooling liquid medium. The raw material composition contains a non-aqueous dispersion medium and a dispersoid. The cooling liquid medium is a liquid medium that results in 0-50 particles 10 μm or more in the flocculation test below: dispersing a composition identical to the raw material composition; preparing a test dispersion liquid having a particle size of less than 10 μm; preparing a test sample by mixing the test dispersion liquid and the cooling liquid medium at a mass ratio of 1:1; and identifying the number of particles of 10 μm or more in the test sample.

A water-based inkjet ink comprising a pigment, a surfactant (A), and a water-soluble organic solvent (B), in which the surfactant (A) includes an acetylenediol surfactant (A1) having an ethylene oxide structure and a propylene oxide structure, and having an HLB value of 10 or less; the water-soluble organic solvent (B) includes an alkanediol (B1) having 3 to 5 carbon atoms, and a glycol monoether (B2) having 4 to 10 carbon atoms; and a mass ratio ((B1)/(B2)) between a content of the alkanediol (B1) having 3 to 5 carbon atoms and a content of the glycol monoether (B2) having 4 to 10 carbon atoms is 0.8 to 12.

The purpose of the disclosure is to provide a resin composition for molding, said resin composition exhibiting good compatibility with polyolefins and containing an ultraviolet absorbing polymer that is able to be purified at a low cost, and said resin composition being capable of forming a molded body that exhibits good transparency. A resin composition for molding containing a thermoplastic resin and an ultraviolet absorbing polymer, wherein: the ultraviolet absorbing polymer has a monomer unit represented by general formula (1), a monomer unit represented by general formula (2) and a thiol-based chain transfer agent residue; and the thiol-based chain transfer agent that forms the thiol-based chain transfer agent residue has a thiol group and one or more moieties that are selected from the group consisting of a carboxyl group, a hydroxyl group and an ester bond.