Nitto-denko Corporation

Kuraray Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Matsushita Electric Works, Ltd.

Takeshi Nakano

Tomohiro Ono

Koso Matsuda

Hiroyuki Nishii

Shinji Nakai

Mizuki Yamamoto

Takashi Suzuki

Keiji Hayashi

Kazunari Takahashi

Hiroyuki Ogi

Tsunehiko Araki

Yoshihiko Okuda

Shogo Sasaki

Souya Jo

Kenichi Kataoka

Naoki Fujiwara

Takeshi Kusudou

Hiroyuki Ohgi

Keiji Kubo

Toshinori Kato

Nozomu Sugoh

Kazushige Morisue

Taketomo Yamashita

Kuniharu Tatetsuki

Tohru Hanahara

Kunisige Kurata

A reinforcing film comprises a pressure sensitive adhesive layer laminated and fixed on a principal surface of a film substrate. The pressure sensitive adhesive layer is formed of a photocurable composition containing a photocurable agent and a base polymer having a crosslinked structure. The gel fraction of the photocurable composition is preferably 60% or more. The shear storage elastic modulus at 25° C. of the pressure sensitive adhesive layer is preferably 1×10to 1.2×10Pa. The shear storage elastic modulus at 25° C. of the pressure sensitive adhesive layer after photocuring is preferably 1.5×10to 2×10Pa.

Reinforcing film

A reinforcing film comprises a pressure sensitive adhesive layer laminated and fixed on a principal surface of a film substrate. The pressure sensitive adhesive layer is formed of a photocurable composition containing a photocurable agent and a base polymer having a crosslinked structure. A frictional force of the pressure sensitive adhesive layer measured with a frictional force microscope at a frequency of 5 Hz is preferably 2 to 5 times a frictional force at a frequency of 0.1 Hz. After photocuring of the pressure sensitive adhesive layer, a frictional force of a photocured pressure sensitive adhesive layer measured with the frictional force microscope at a frequency of 5 Hz is preferably not less than 5 times a frictional force measured at a frequency of 0.1 Hz.

The electrolyte membrane of the present disclosure includes a phase A forming a matrix phase, and a phase B. The phase B is continuous from a first principal surface of the electrolyte membrane to a second principal surface of the electrolyte membrane opposite to the first principal surface. The phase B includes a graft polymer having a main chain and a graft chain. The graft chain has a functional group having anion-exchange ability. The main chain preferably has no functional group having anion-exchange ability. The electrolyte membrane of the present disclosure can reliably maintain the function as a separation membrane even when decomposition reaction by a peroxide occurs.

Electrolyte membrane, method for producing the same, and membrane-electrode assembly for fuel cells that includes electrolyte membrane

Provided is an ionomer resin including a copolymer containing the following first structural unit.  Lto Lare each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkanol group having 1 to 4 carbon atoms, or a specific functional group including an anion-exchange group, and an example of the functional group is &#x2014;Z-M-Z(R)(R)(R). Rto Rare directly bonded to Zand are each independently an alkyl group having 1 to 8 carbon atoms or an alkanol group having 1 to 8 carbon atoms. Mis a linear hydrocarbon chain having 3 to 8 carbon atoms, Zis a nitrogen atom or a phosphorus atom, and Zis a nitrogen atom bonded to one hydrogen atom, an oxygen atom, or a sulfur atom. Lis a hydrogen atom, a methyl group, or an ethyl group.

Ionomer resin, and ionomer solution, multilayer body, member, electrochemical element, and electrochemical device that include the same

Provided is a resin including a copolymer having a first structural unit and/or second structural unit and a structural unit having a polar group.  R, R, R, and Rare each independently a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, Rand Rare each independently a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, Ais a saturated carbon chain having 3 to 7 carbon atoms or a structure resulting from substitution of a heteroatom for a part of the carbon atoms of the saturated carbon chain, m and n are each independently 0 or 1, and Xand Xare each independently a halide ion, a hydroxide ion, or an anion of an organic or inorganic acid.

Resin having anion-exchange group, and resin-containing liquid, multilayer body, member, electrochemical element, and electrochemical device that include the same

The membrane electrode assembly (MEA) of the present invention is a fuel cell MEA including an anion exchange membrane and a catalyst layer disposed on the surface of the membrane. In the MEA, the anion exchange membrane is an anion-conducting polymer electrolyte membrane in which a graft chain having anion conducting ability is graft-polymerized on a substrate formed of a skived film of ultra-high molecular weight polyolefin. This MEA has various superior properties for achieving an improvement in the power output of an anion exchange PEFC compared to conventional MEAs.

Fuel cell membrane electrode assembly and method for producing the same, and fuel cell

An electrolyte membrane having a structure wherein fine rubber particles having substantially no ion-conducting group and having an average particle size of 20 nm to 1 &#x3bc;m are uniformly dispersed in a matrix including a resin component having ion-conducting group. The electrolyte membrane has high bonding ability to electrodes and does not cause cracks and ruptures because it is kept flexible even under low humid or absolutely dried condition, in addition, shows high ion conductivity even under low humid or absolutely dried condition because the matrix having ion-conducting groups are continuous.

Electrolyte membrane and membrane-electrode assembly

A polymer electrolyte membrane comprising as a main ingredient a block copolymer which comprises, as its constituents, a polymer block (A) having as a main unit an aromatic vinyl compound unit and a polymer block (B) forming a flexible phase, and has ion-conducting groups on the polymer block (A), said aromatic vinyl compound unit being such that the hydrogen atom bonded to the &#x3b1;-carbon atom is non-replaced or replaced with an alkyl group or an aryl group optionally having substituent(s), and at least one of hydrogen atoms directly bonded to the aromatic ring is replaced with an alkyl group; and a membrane electrode assembly and a polymer electrolyte fuel cell both of which uses it. The polymer block (A) can have a restraining phase, and/or can be cross-linked. The electrolyte membrane is mild to the environment, has a high ion conductivity and good bonding properties to electrodes, is excellent in moldability, and is not easily influenced by methanol; and displays excellent performance in polymer electrolyte fuel cells, particularly direct methanol fuel cells.

Polymer electrolyte membrane, membrane-electrode assembly and polymer electrolyte fuel cell

A polymer electrolyte membrane comprising as a main ingredient a block copolymer (P) which comprises, as its constituents, a vinyl alcoholic polymer block (A) and a polymer block (B) having ion-conducting groups, which block copolymer (P) is cross-linking treated, and a membrane-electrode assembly and a fuel cell using the polymer electrolyte membrane, respectively. Preferred as polymer block (B) is one having a styrene or vinylnaphthalene skeleton or a 2-(meth)acrylamido-2-methylpropane skeleton. The ion-conducting group includes a sulfonic acid group, a phosphonic acid group or the like.

Polymer electrolyte membrane and process for preparation thereof, and membrane-electrode assembly and polymer electrolyte fuel cell

This invention relates to an electrochemical device which comprises a molding containing as a main ingredient a copolymer (Z) and at least two mutually insulated electrodes in joint with the molding, wherein the copolymer (Z) comprises a polymer block (A) having as a main unit an aromatic vinyl compound unit and a polymer block (B) being incompatible with the polymer block (A), and has ion-conducting groups on the polymer block (A). The electrochemical device of the invention can be used particularly as an actuator device.

Polymer electrochemical device

A semiconductor integrated circuit is disclosed which includes a clock synchronous memory, an internal clock generating circuit, a clock selecting circuit, a data output converting circuit, and a data output selecting circuit. The clock synchronous memory is disposed to receive a control signal, an address signal, and a data input and provide an internal data output. The internal clock generating circuit is disposed to generate an internal clock signal having a frequency higher than that of an external clock signal. The clock selecting circuit is disposed to select between the external clock signal and the internal clock signal and send the selected clock signal to the clock synchronous memory. The data output converting circuit is disposed to convert the internal data output into an external data output in synchronization with a clock signal having a frequency lower than that of the internal clock signal. The data output selecting circuit is disposed to select between the internal data output and the external data output and provide the selected data output.

Semiconductor integrated circuit

A first device serves to sense a start of a transition of an address signal and to generate a transition start signal representative thereof. The first device has a first predetermined input switching voltage with respect to the address signal. A second device serves to sense an end of a transition of the address signal and to generate a transition end signal representative thereof. The second device has a second predetermined input switching voltage with respect to the address signal. The first and second predetermined input switching voltages are positively different from each other.

Circuit for detecting address signal transition

An ionization type smoke sensing device includes a printed board. An inner electrode made of heat-resistant metal is attached to the printed board and a radioactive source is fixed to the inner electrode. An outer electrode in the form of a bottomed cylinder made of heat-resistant metal and adapted to cover the inner electrode extends through the printed board and is integrally joined to a protective lid member made of heat-resistant metal at the back of the printed board. Therefore, the outer electrode and the lid member cooperate with each other to define an ionization chamber. The outer electrode is formed with smoke inlet ports for introducing smoke into the ionization chamber. The electric circuit serves to give pulse signals of a relatively high voltage to the outer electrode and to detect the presence of smoke on the basis of the amount of a current flowing through the inner electrode.

Ionization type smoke sensing device

A detection signal processing circuit for photoelectric smoke detectors reliably stable with respect to external noise is provided. Light receiving section of the detector for receiving light emitted intermittently from light emitting section and scattered by smoke particles comprises a light receiving element, a condenser charged depending on intermittent scattered light intensity received by the element and of a value over a predetermined level, and an output circuit providing an output to a following operation means only when charge amount of the condenser has reached a predetermined value. Optimumly, the predetermined value of the condenser charge is achieved when at least two or more of the intermittent scattered light are received continuously.

Growing community of inventors

Osaka, Japan

Takeshi Nakano