Mitsui Chemicals, Inc.

Atsuko Tachibana

Takashi Uchida

Akihiro Imai

Masahiro Isobe

Gen Miyata

Yoshihiko Tomita

Yu Iimuro

Izumi Mega

Wengon Yah

The invention of the present application addresses the problem of providing a binder for electrochemical cells which exhibits sufficient adhesive properties with respect to collectors and active materials, which is electrochemically stable, which is not readily swelled by electrolytes, and with which battery cycle characteristic can be sufficiently improved. Accordingly, provided is a binder for electrochemical cells which comprises a polyolefin copolymer (A) including structural units derived from an olefin, and structural units derived from (meth)acrylic acid. The carboxylic acid included in the structural units derived from the (meth)acrylic acid is neutralized by at least one non-volatile alkali compound and at least one volatile alkali compound.

Binder for electrochemical cells, paste for electrochemical cells, and method for producing electrode for electrochemical cells

An aqueous polyurethane resin is prepared by reaction of an isocyanate group-terminated prepolymer with a chain extender containing polyamine. The isocyanate group-terminated prepolymer is obtained by reaction of at least a polyisocyanate containing 50 wt % or more of a non-multiple ring polyisocyanate that does not contain an aromatic ring and an aliphatic ring, or contains one aromatic ring or aliphatic ring; polyoxyethylene polyol; and a polyoxyethylene side chain-containing active compound having two or more hydroxyl groups or isocyanate groups at its molecular terminal and having a polyoxyethylene group in the side chain.

Aqueous polyurethane resin, hydrophilic resin, and film

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Ichihara, Japan

Atsuko Tachibana