Ube Industries, Inc.

Iwate University

Nobuharu Hisano

Tetsuji Hirano

Masayuki Kinouchi

Hiroaki Yamaguchi

Yoshiyuki Watanabe

Yukinori Kohama

Takuya Oka

Shin-ichiro Kohama

Taizou Murakami

Yoshiyuki Oishi

Tatsuya Arai

Michinori Suzuki

Masato Murakami

Nobuhiro Tsujimoto

Masafumi Kohda

Yasumasa Iwamoto

Sakae Yuasa

Satoshi Bandai

Kosuke Oishi

Koji Maeda

Yoshihira Hosoyama

A polyimide precursor including at least one repeating unit represented by the following chemical formula (1): 

Polyimide precursor and polyimide

A polyimide precursor comprising a repeating unit represented by the following chemical formula (1):   

Polyimide precursor, polyimide, varnish, polyimide film, and substrate

A polyimide precursor comprising at least one repeating unit represented by the following chemical formula (5): in which Ais a divalent group of an aromatic diamine or an aliphatic diamine, from which amino groups have been removed; and Xand Yare each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms, and/or at least one repeating unit represented by the following chemical formula (6): in which Ais a divalent group of an aromatic diamine or an aliphatic diamine, from which amino groups have been removed; and Xand Yare each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms.

Polyimide precursor, polyimide, polyimide film, varnish, and substrate

A polyimide precursor, a polyimide using the polyimide precursor, and a polyimide film using the polyimide. The polyimide film has excellent adhesiveness to a metal layer or an adhesive, and has improved heat resistance. The polyimide solution may be used as a coating material.

Polyimide precursor, polyimide, polyimide film, polyimide metal laminate, and polyimide solution

A polyimide precursor for obtaining a polyimide film having excellent adhesiveness to metals and improved transmittance in the UV-visible range, a polyimide in which the polyimide precursor is used, a polyimide film in which the polyimide is used, and a method for manufacturing a triazine compound used for manufacturing the polyimide precursor, polyimide film and polyimide.

Polyimide precursor, polyimide, polyimide film, and method for manufacturing triazine compound used for manufacturing same

A polyimide film, which is produced by the reaction of a tetracarboxylic acid component comprising 3,3',4,4&#x2032;-biphenyltetracarboxylic dianhydride as the main component and a diamine component comprising p-phenylenediamine as the main component, is heated at a temperature of from 460&#xb0; C. to 550&#xb0; C., and then water or an alkaline aqueous solution is sprayed on a surface of the polyimide film for surface treatment, thereby improving adhesiveness, while maintaining the excellent properties inherent in the polyimide film.

Polyimide film and process for producing polyimide film

A method for manufacturing a polyimide-metal laminate including forming a polyimide film, in which at least surfaces of both sides of the film are formed by thermally fusion-bondable polyimide layers (a), and thermal compression-bonding metal layers on both sides of the polyimide film; in which forming the polyimide film includes reacting a tetracarboxylic dianhydride component with a diamine component containing a diamine compound represented by general formula (1) to give a solution of a polyamic acid (a), forming a self-supporting film from the solution of the polyamic acid (a) and imidizing the self-supporting film by heating at a maximum heating temperature of 440&#xb0; C. or lower to form the polyimide layer (a); 

Method for manufacturing polyimide metal laminate

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 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 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.

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

The present invention provides a process for the production of a conjugated diene polymer having a controlled microstructure at a high polymerization activity in the presence of a metallocene type complex of compound of transition metal of the group V of the Periodic Table. A novel catalyst is provided comprising (A) a metallocene type complex of a transition metal of the group V of the Periodic Table, (B) an ionic compound of a non-coordinating anion and a cation, (C) an organic metal compound of the groups I to III and (D) water, wherein the molar ratio of (C)/(D) is from 0.66 to 5. A novel process for the production of a conjugated diene polymer is also provided, which comprises the polymerization of a conjugated diene compound in the presence of a catalyst comprising (A) a metallocene type complex of a transition metal of the group V of the Periodic Table, (B) an ionic compound of a non-coordinating anion and a cation, (C) an organic metal compound of the groups I to III and (D) water, wherein the molar ratio of (C)/(D) is from 0.66 to 5.

Conjugated diene compound polymerization catalyst process for the preparation of conjugated diene polymer in the presence thereof and polybutadiene thus prepared

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Ube, Japan

Nobuharu Hisano