Abstract: 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.

Abstract: 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.

Abstract: 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), R1, R2 and R3 represent 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), R1, R2 and R3 represent a hydrocarbon group having 1-20 carbon atoms or a hydrogen atom, and R1 and R3 are not the same.

Abstract: 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.

Abstract: 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.

Abstract: A method for producing a polymer electrolyte membrane having a strong acid group or a superstrong acid group is provided. The method includes casting on a support a polymer electrolyte solution containing from 0.0005 to 2 parts by weight of a phosphate ester represented by formula (11) and/or a salt between an amine represented by formula (12) and a phosphate ester represented by formula (11), with respect to 100 parts by weight of a polymer electrolyte; heating the solution until a solvent of the solution is evaporated to form a self-supporting membrane; and removing the self-supporting membrane from the support.

Abstract: 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.

Abstract: 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 ?30° C.; and a composite electrolyte membrane comprising a porous body impregnated with such a liquid electrolyte.

Abstract: A process for packaging an electronic device employs an insulating protective resin layer produced from one or more of the resin compositions: (1) 100 parts of an organic solvent-soluble resin having a polysiloxane skeleton and a polar group, 0.5 to 30 parts of an epoxy compound having an epoxy equivalent of more than 800, and an organic solvent, (2) 100 parts of an organic solvent-soluble resin having a polysiloxane skeleton and a polar group, 0.1 to 10 parts of an epoxy compound having an epoxy equivalent of 100 to 800, 2 to 30 weight parts of a polyvalent isocyanate compound, and an organic solvent; and (3) 100 parts of an organic solvent-soluble resin having a polysiloxane skeleton and a polar group, 0.1 to 20 parts of an epoxy compound having an epoxy equivalent of more than 800, 2 to 30 parts of a polyvalent isocyanate compound, and an organic solvent.

Abstract: 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.

Abstract: 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.

Abstract: 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), R1, R2 and R3 represent 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), R1, R2 and R3 represent a hydrocarbon group having 1-20 carbon atoms or a hydrogen atom, and R1 and R3 are not the same.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A process for packaging an electronic device employs an insulating protective resin layer produced from one or more of the resin compositions: (1) 100 parts of an organic solvent-soluble resin having a polysiloxane skeleton and a polar group, 0.5 to 30 parts of an epoxy compound having an epoxy equivalent of more than 800, and an organic solvent, (2) 100 parts of an organic solvent-soluble resin having a polysiloxane skeleton and a polar group, 0.1 to 10 parts of an epoxy compound having an epoxy equivalent of 100 to 800, 2 to 30 weight parts of a polyvalent isocyanate compound, and an organic solvent; and (3) 100 parts of an organic solvent-soluble resin having a polysiloxane skeleton and a polar group, 0.1 to 20 parts of an epoxy compound having an epoxy equivalent of more than 800, 2 to 30 parts of a polyvalent isocyanate compound, and an organic solvent.

Abstract: 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.

Abstract: A polyimide film having enhanced surface activity and improved surface adhesion, and a polyimide film having a metal film in which the metal film is bonded to the polyimide film with practically accepted high bonding strength are provided by a polyimide film having, at least on one surface, a coated particle layer comprising inorganic particles having a mean particle size of 1,000 nm or less which are coated with a metal oxide layer via an intervening layer comprising a mixture of the same metal oxide as above and polyimide, and the polyimide film having a metal film placed on the coated particle layer.

Abstract: A polymer electrolyte comprising a hydrophilic segment having a sulfonic acid groups and a hydrophobic segment having no sulfonic acid group, each segment having an aromatic ring in its main chain, wherein the polymer electrolyte is an aromatic block copolymer having an ion-exchange capacity of solely the hydrophilic segment at 3.6 mmol/g or more, and an ion-exchange capacity of the block copolymer in the range of from 0.5 mmol/g to 3.0 mmol/g; a polymer electrolyte membrane produced from the polymer electrolyte and a fuel cell using thereof.