Sumitomo Seika Chemicals Co., Ltd.

National Institute of Advanced Industrial Science and Technology

Nec Corporation

Yuji Kinpara

Nobutaka Fujimoto

Junichi Fujishige

Tetsuo Sakai

Takashi Mukai

Masanori Morishita

Shuichi Karashima

Shun Hashimoto

Shigeyuki Iwasa

Hiroyuki Nishide

Kentaro Nakahara

Kenichi Oyaizu

Shigeki Hamamoto

Yasuhiro Nawata

Tomoaki Yamasaki

Tomoki Kawakita

Kenya Matsuda

Yasuhito Ushijima

Sosuke Yamaguchi

Provided is a binder for lithium ion secondary battery positive electrodes, which is capable of providing a positive electrode for lithium ion secondary batteries with excellent high-rate discharge characteristics. A binder for lithium ion secondary battery positive electrodes, which contains a binder resin and 500 ppm or less of an oil-soluble radical initiator.

Binder for lithium ion secondary battery positive electrodes

This binder for use in a positive electrode for a lithium ion secondary battery contains a copolymer of both vinyl alcohol and an alkali-metal-neutralized ethylenically unsaturated carboxylic acid.

Binder for use in positive electrode for lithium ion secondary battery, positive electrode for lithium ion secondary battery containing said binder, lithium ion secondary battery using said positive electrode, and electrical machinery and apparatus

A negative electrode mixture for a nonaqueous electrolyte secondary cell according to the present invention includes: a negative electrode active material; a conductive assistant; and a binder. The binder contains a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.

Negative-electrode mixture for non-aqueous electrolyte secondary cell, negative electrode for non-aqueous electrolyte secondary cell containing said mixture, non-aqueous electrolyte secondary cell provided with said negative electrode, and electrical device

A binder for an electric double-layer capacitor electrode according to the present invention includes a copolymer of vinyl alcohol and an alkali metal-neutralized product of ethylene-unsaturated carboxylic acid.

Binder for electric double-layer capacitor electrode, electric double-layer capacitor electrode comprising same binder, electric double-layer capacitor using same electrode, and electric apparatus

The present invention provides a radical composition capable of suppressing elution of electrode components in an electrolyte solution when used in an electrode for a secondary battery, and a battery using the radical composition. The present invention relates to a radical composition including a pyrroline nitroxide polymer and polyethylene glycols.

Radical composition and battery using same

The present invention provides a saponification product of a vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer having superior tolerance of the aqueous thickening liquid against mechanical shear. More specifically, the present invention provides a saponification product of a vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer having the superior tolerance, by polymerizing a mixture where the molar ratio of the vinyl ester/ethylenically unsaturated carboxylic acid ester is from 8/2 to 3/7, and saponifying the obtained copolymer in a mixed solvent where the mass composition ratio of an aqueous organic solvent/water mixture solvent is from 3/7 to 8/2.

Saponification product of vinyl ester/ethylenically unsaturated carboxylic acid ester copolymer and process for producing the same

A process for producing a water-absorbent resin particle comprising subjecting a water-soluble ethylenically unsaturated monomer to a reverse phase suspension polymerization, characterized in that the process for producing a water-absorbent resin particle comprises the steps of (A) subjecting the water-soluble ethylenically unsaturated monomer to a first-step reverse phase suspension polymerization in a hydrocarbon-based solvent using a water-soluble radical polymerization initiator in the presence of a surfactant and/or a polymeric protective colloid, and optionally an internal crosslinking agent; (B) carrying out at least one step of the procedures of adding an aqueous solution of a water-soluble ethylenically unsaturated monomer containing a water-soluble radical polymerization initiator and optionally an internal crosslinking agent to a reaction mixture after the termination of the first-step reverse phase suspension polymerization in a state that the surfactant and/or the polymeric protective colloid is dissolved in the hydrocarbon-based solvent, and subsequently subjecting the mixture to a reverse phase suspension polymerization; and (C) post-crosslinking the resulting water-absorbent resin.

Process for production of water-absorbing resin particles

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Hyogo, Japan

Yuji Kinpara