Kao Corporation

Panasonic Holdings Corporation

Atsushi Hiraishi

Yasuhiro Doi

Akito Itoi

Akihiro Koyama

Takahiro Yano

Kei Takahashi

Yusuke Shimizu

Takehiro Tsutsumi

Kyoichi Shirota

Yutaro Kinoshita

Kazuo Oki

Takahiro Sato

Yuki Wakabayashi

Hiroyuki Yoshida

Masayuki Narita

Hiroshi Noro

Kazuo Kuwahara

Ryuichi Akagi

Koichi Ohori

Kazuo Kubota

Haruyuki Sato

Hideki Goto

Jun Kozuka

Yoshihito Hamada

Takahiro Kawaguchi

Tsutomu Miyahara

Naoyuki Wada

Mitsuo Asai

In one aspect, provided is a method for producing a semiconducting single-walled carbon nanotube dispersion. This method allows semiconducting single-walled carbon nanotubes to be separated from a single-walled carbon nanotube mixture containing semiconducting single-walled carbon nanotubes and metallic single-walled carbon nanotubes in an aqueous medium, and yet requires only an easily available separation agent and a simple operation. One aspect of the present disclosure relates to a method for producing a semiconducting single-walled carbon nanotube dispersion. The method includes (A) preparing a single-walled carbon nanotube dispersion to be separated that contains single-walled carbon nanotubes composed of semiconducting single-walled carbon nanotubes and metallic single-walled carbon nanotubes, an aqueous medium and a nonionic polymer containing a constitutional unit A derived from a monomer represented by the following formula (1), and (B) centrifuging the single-walled carbon nanotube dispersion to be separated and then collecting a supernatant containing the semiconducting single-walled carbon nanotubes from the centrifuged single-walled carbon nanotube dispersion. A content of the constitutional unit A in all constitutional units of the polymer is 2 mol % or more. The polymer is water soluble.CHCR—COO-(EO)(PO)—R2  (1)

Method for producing semiconducting single-walled carbon nanotube dispersion

In one aspect, provided is a method for producing a semiconducting single-walled carbon nanotube dispersion. This method allows semiconducting single-walled carbon nanotubes to be separated from a single-walled carbon nanotube mixture containing semiconducting single-walled carbon nanotubes and metallic single-walled carbon nanotubes in an aqueous medium, and yet requires only an easily available separation agent and a simple operation. One aspect of the present disclosure relates to a method for producing a semiconducting single-walled carbon nanotube dispersion. The method includes (A) preparing a single-walled carbon nanotube dispersion to be separated that contains single-walled carbon nanotubes composed of semiconducting single-walled carbon nanotubes and metallic single-walled carbon nanotubes, an aqueous medium, and a copolymer containing a constitutional unit A derived from a monomer represented by the following formula (1) and a constitutional unit B derived from a monomer represented by the following formula (3), and (B) centrifuging the single-walled carbon nanotube dispersion to be separated and then collecting a supernatant containing the semiconducting single-walled carbon nanotubes from the centrifuged single-walled carbon nanotube dispersionCH═CH—COOM  (1)CH═CR—COO—(CHCHO)—H  (3).

The present invention relates to a dispersant composition for carbon nanotubes, containing: a copolymer that includes a structural unit A represented by the following general formula (1) and a structural unit B represented by the following general formula (2); and a solvent, wherein the content of the structural unit B in all structural units of the copolymer is 20 mass % or more. In the following formulae, R, R, R, R, R, and Rare the same or different from each other and are each a hydrogen atom, a methyl group, or an ethyl group, Ris a hydrocarbon group having 16 to 30 carbon atoms, Ris a linear or branched alkylene group having 2 to 3 carbon atoms, Xis on oxygen atom or NH, Xis an oxygen atom, p is the number of 1 to 8, and Ris a hydrogen atom, a methyl group, or an ethyl group.

Dispersant composition for carbon nanotube

The present invention relates to a dispersant for a positive electrode of a power storage device. The dispersant is a copolymer that contains a constitutional unit A represented by the following general formula (1) and at least one constitutional unit B selected from the group consisting of a constitutional unit Brepresented by the following general formula (2) and a constitutional unit Brepresented by the following general formula (3). The total content of the constitutional unit A and the constitutional unit B in the copolymer is 80% by mass or more. The content of the constitutional unit A in all constitutional units of the copolymer is 35% by mass or more.

Dispersant for power storage device positive electrode

A negative electrode constituting a non-aqueous electrolyte secondary battery, which is an example of an embodiment, comprises a negative-electrode mixture layer including a negative-electrode active material and a binder agent. The negative electrode includes, as the binder agent, at least a polymer constituted by a constituent unit A represented by formula (1), a constituent unit B represented by formula (2), and a constituent unit C represented by formula (3). The molar ratio (l/m) of the constituent unit A to the constituent unit B is from 0.2 to 1.8.

Negative electrode for non-aqueous electrolyte secondary battery, and non-aqueous electrolyte secondary battery

A method for producing a semiconducting SWCNT dispersion of the present invention comprises: a step A of preparing a to-be-separated SWCNT dispersion that includes a SWCNT mixture, an aqueous medium, and a polymer including a structural unit A derived from a monomer represented by Formula (1), and a step B of centrifuging the to-be-separated SWCNT dispersion and subsequently collecting a supernatant including the semiconducting SWCNT from the centrifuged to-be-separated SWCNT dispersion. The weight-average molecular weight of the polymer is 1,000 or more and 100,000 or less.

One aspect provides a resin composition that is used for an electrode of a power storage device and that has excellent ion permeability while ensuring good binding properties with an electrode. One aspect of the present disclosure relates to a resin composition for an electrode of a power storage device. The resin composition contains polymer particles. The polymer particles have ion permeability. A rate of change in elasticity of the polymer particles before and after treatment with an electrolyte solution [(modulus of elasticity after treatment)/(modulus of elasticity before treatment)] is 30% or less.

Resin composition for power storage device electrode

The present invention is directed to a water dispersion for ink-jet printing which realizes sufficient optical density and exhibits excellent filterability and storage stability; a water-based ink containing the water dispersion; and a process for producing the water dispersion or the water-based ink. The invention includes the following: (1) a water dispersion for ink-jet printing containing anionic colorant particles and cationic polymer particles, and a water-based ink for ink-jet printing containing the water dispersion; (2) a process for producing a water dispersion for ink-jet printing including a step of mixing a water dispersion of anionic colorant particles with a water dispersion of cationic polymer particles, to thereby produce a water dispersion of composite particles formed of the cationic polymer particles and the anionic colorant particles adhering thereto, and a water dispersion produced through the production process; and (3) a process for producing a water-based ink for ink-jet printing including step (A) of mixing a water dispersion of cationic polymer particles with a water-soluble organic solvent, or dispersing a cationic polymer in water and a water-soluble organic solvent, to thereby produce a dispersion containing the cationic polymer particles, water, and the water-soluble organic solvent; and step (B) of mixing the produced dispersion with a dispersion containing anionic colorant particles and water.

Water-based ink for ink-jet printing

The present invention provides [1] a water dispersion for ink-jet printing containing chain-like particles each containing anionic organic pigment particles and a cationic polymer, wherein the ratio of organic pigment primary particles forming the chain-like particles to all the pigment primary particles contained in the water dispersion is 10% by number or more; [2] a water-based ink for ink-jet printing containing the water dispersion; [3] a method for producing a water dispersion for ink-jet printing as described above in [1]; and [4] a water-based ink for ink-jet printing containing a water dispersion produced through the method. The water dispersion and water-based ink for ink-jet printing of the present invention realize excellent optical density.

Aqueous ink for inkjet recording

The powder composition for paper manufacturing of the invention contains a hydrophobic organic compound (A), an emulsifying and dispersing agent (B), and optionally water-soluble saccharides (C) added based on necessity and has an average particle diameter of 0.1 to 2,000 &#x3bc;m.

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Wakayama, Japan

Atsushi Hiraishi