Ube Industries, Inc.

Tetsuji Hirano

Masayuki Kinouchi

Hiroshi Inoue

Nobuharu Hisano

Tadao Muramatsu

Noriyuki Isobe

Nobuhiro Ogawa

Kouichiro Kurachi

Seiichirou Takabayashi

Masahiro Naiki

Ryoichi Takasawa

Shuichi Maeda

Yasuji Narahara

Toru Kidosaki

Tatsuya Arai

Toshikazu Hamamoto

Takeshige Nakayama

Tomonori Nakayama

Katsuo Imatani

Kenji Matsubara

Takashi Kohno

Yoshiyuki Miwa

Tadashi Miura

Chizuyo Maeda, Legal Representative

Tsutomu Funagoshi

Daisuke Maeda, Legal Representative

Megumi Maeda, Legal Representative

The present invention relates to a binder resin composition for an electrode, including a polyamic acid and a solvent, wherein the polyamic acid is (i) a polyamic acid which includes a tetracarboxylic acid component including 10 to 100 mol % of 4,4'-oxydiphthalic acid and 90 to 0 mol % of 3,3&#x2032;,4,4&#x2032;-biphenyltetracarboxylic acid and/or pyromellitic acid and a diamine component including an aromatic diamine having 1 to 4 aromatic rings, (ii) a polyamic acid which includes a tetracarboxylic acid component including 3,3&#x2032;,4,4&#x2032;-biphenyltetracarboxylic acid dianhydride and a diamine component including 10 to 90 mol % of p-phenylene diamine and 90 to 10 mol % of 4,4&#x2032;-diaminodiphenyl ether, or (iii) a polyamic acid which includes a tetracarboxylic acid component including 3,3&#x2032;,4,4&#x2032;-biphenyltetracarboxylic acid dianhydride and a diamine component including 40 mol % or more of a bis[4-(4-aminophenoxy)phenyl] compound.

Binder resin composition for electrode, electrode mixture paste, and electrode

A first polyimide precursor solution composition contains: (A) a polyamic acid; (B) a carboxylic acid compound having at least three pairs of carboxyl groups within its molecule or an esterified product thereof; and (D) a solvent. A second polyimide precursor solution composition contains the components (A), (B), and (D) of the first polyimide precursor solution composition and additionally containing (C) a carboxylic acid compound having two pairs of carboxyl groups within its molecule or an esterified product thereof. A third polyimide precursor solution composition contains the components of the second polyimide precursor solution composition, wherein the polyamic acid (A) is a polyamic acid having a specific structure.

Polyimide precursor solution composition

A polymer electrolyte composition of a sulfonated block copolymer (A) having a hydrophilic segment with a sulfonic acid group and a hydrophobic segment with no sulfonic acid group, each segment having an aromatic ring is its main chain, and an aromatic polymer (B) having no sulfonic acid group with a structural unit that is identical to the structural unit contained in the hydrophobic segment of the sulfonated block copolymer is provided. The ion-exchange capacity of the composition can be in a range of 0.5 mmol/g to 2.9 mmol/g. Electrolyte membranes, membrane/electrolyte assemblies, and electrolyte fuel cells utilizing the polymer electrolyte composition are also provide.

Polymer electrolyte composition

A binder resin precursor solution composition for electrode containing at least (A) a polyamic acid having repeating units represented by chemical formulae (1) and (2) in a (1) to (2) molar ratio of 2:8 to 8.5:1.5 and having a tetracarboxylic acid component to diamine component molar ratio of 0.94 to 0.99, (B) a carboxylic acid compound having two pairs of carboxyl groups in the molecule thereof or an ester thereof, and (C) a solvent. 

Binder resin precursor solution composition for electrode

A method of producing a sulfonated polyarylether block copolymer is provided. The method includes producing a sulfonated polyarylether block copolymer containing a hydrophobic segment having a structural unit represented by formula (5) and a hydrophilic segment having a structural unit having a sulfonic acid groups or derivative thereof incorporated into a structure represented by formula (6). A hydrophilic segment prepolymer having a sulfonic acid group in a potassium salt form and a hydrophobic segment prepolymer are block copolymerized. A proton conductor that includes the sulfonated polyarylether block copolymer is also provided.

Method for producing a sulfonated polyarylether block copolymer

An acid-base mixture composed of a base component and an acid component wherein at least either the base component or the acid component is composed of at least two different compounds is characterized in that at least one base in the base component is represented by the formula (1) below. An ion conductor is characterized by being composed of an acid-base mixture which is composed of a base component composed of a base represented by the formula (2) below and an acid component. (In the formula (1), R, Rand Rrepresent a hydrocarbon group having 1-20 carbon atoms or a hydrogen atom, and at least one of them is a hydrocarbon group.) (In the formula (2), R, Rand Rrepresent a hydrocarbon group having 1-20 carbon atoms or a hydrogen atom, and Rand Rare not the same.)

Acid-base mixture and ion conductor comprising the same

A curable polyimide resin composition containing a polyimide resin obtainable from by a reaction of a reaction mixture containing a diisocyanate compound, a carbonate group-containing diol compound and an imide compound having two terminal hydroxyhydrocarbyl groups gives a cured insulation film having improved characteristics.

Polyimide resin and curable resin composition

A liquid electrolyte composed of a base A and phosphoric acid B in a molar ratio A:B in a range of 1:3 to 1:50 having a solidification temperature of lower than &#x2212;30&#xb0; C.; and a composite electrolyte membrane comprising a porous body impregnated with such a liquid electrolyte.

Liquid electrolyte

An inexpensive and durable polymer electrolyte composition exhibiting high ionic conductivity even in the absence of water or a solvent, characterized by comprising a molten salt and an aromatic polymer having a carbonyl bond and/or a sulfonyl bond in the main chain thereof and containing a cation exchange group. The aromatic polymer is preferably an aromatic polyether sulfone having a specific structural unit and containing a cation exchange group, an aromatic polyether ketone having a specific structural unit and containing a cation exchange group, or an aromatic polyether sulfone block copolymer and/or an aromatic polyether ketone block copolymer, the block copolymers comprising a hydrophilic segment containing a cation exchange group and a cation exchange group-free hydrophobic segment. The polymer electrolyte composition containing the block copolymer as an aromatic polymer exhibits high structural retention even in high temperatures.

A modified polyimide resin favorably employable for manufacturing an insulation film of an electric-electronic device is composed of recurring units (I) derived from a biphenyltetracarboxylic acid compound, a diamine compound, and a monoamine compound having at least one hydroxyl group and recurring units (II) derived from diisocyanate and polybutadiene having hydroxyl group at each terminal, which optionally contains further recurring units (III) derived from diisocyanate and a compound having hydroxyl group at each terminal and further having a reactive substituent.

Modified polyimide resin and curable resin composition

An inexpensive and durable polyelectrolyte composition includes both an aromatic polymer containing carbonyl linkages and/or sulfonyl linkages in the backbone chain and bearing cation-exchange groups and a fused salt exhibits a high ionic conductivity even in the absence of water or a solvent. The aromatic polymer is preferably an aromatic polyether sulfone comprising specific structural units and bearing cation-exchange groups, an aromatic polyether ketone comprising specific structural units and bearing cation-exchange groups, an aromatic polyether sulfone block copolymer consisting of at least one hydrophilic segment bearing cation-exchange groups and at least one hydrophobic segment free from cation-exchange groups, and/or an aromatic polyether ketone block copolymer consisting of at least one hydrophilic segment bearing cation-exchange groups and at least one hydrophobic segment free from cation-exchange groups. The use of such a block copolymer as the aromatic polymer gives polyelectrolyte compositions which are excellent in maintenance of structure even at high temperature.

Polyelectrolyte compositions

A polymer electrolyte membrane comprising a microporous polymer membrane having pores penetrating through the opposite sides thereof. The microporous polymer membrane holds a mixture of a polymer and a molten salt at a weight ratio of 1/99 to 99/1 and/or a molten salt. The polymer electrolyte membrane is inexpensive, durable, excellent in mechanical strength, excellent in structural retention in high temperatures, and capable of stably holding a molten salt in its porous polymer membrane structure, shows high heat resistance, and secures high ionic conductivity in the absence of water or a solvent and is therefore useful in fuel cells, secondary batteries, electric double layer capacitors, electrolytic capacitors, and the like.

Polyelectrolyte membrane and production method therefor

A polyelectrolyte for a solid polymeric fuel cell comprising an aromatic polyether sulfone block copolymer comprising a hydrophilic segment containing sulfonic acid groups and a hydrophobic segment having no sulfonic acid group at a hydrophilic segment weight fraction W2 to hydrophobic segment weight fraction W1 ratio falling within a range of 0.6&#x3c;W2/W1&#x3c;2.0. The polyelectrolyte for a solid polymeric fuel cell is inexpensive and durable, and its proton conductivity is less influenced by humidity and temperature.

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Yamaguchi, Japan

Tetsuji Hirano