Abstract: The hollow microballoons for CMP polishing pad of the invention are formed of at least one resin selected from the group consisting of a melamine resin, a urea resin and an amide resin and have an average particle size of 1 to 100 ?m. According to the invention, there can be provided hollow microballoons for CMP polishing pad, which, when used in CMP polishing pad, exhibit excellent polishing characteristics, and can stably produce CMP polishing pad even in production of CMP polishing pad.

Abstract: Provided is a photochromic curable composition which forms a cured body that develops excellent photochromic properties. The photochromic curable composition (A) includes: a polyrotaxane monomer wherein, in a polyrotaxane compound having a composite molecular structure composed of an axial molecule and a plurality of cyclic molecules threaded onto the axial molecule, and side chains having OH groups introduced into the cyclic molecules, 1 mol % or more to less than 100 mol % of OH groups in the side chains are modified with a compound having a radical-polymerizable group, (B) a photochromic compound, and (C) a polymerizable monomer other than the (A) polyrotaxane monomer.

Abstract: A membrane-electrode-gasket assembly for alkaline water electrolysis, the assembly including: a separating membrane having first and second membrane faces; a first electrode arranged in contact with the first membrane face; and an insulating gasket holding the membrane and the electrode as one body, the gasket including: first and second faces for contacting with anode- and cathode-side frames respectively; a slit part opening toward an inner side of the gasket and receiving the entire peripheries of the membrane and the electrode; first and second parts facing with each other across the slit part; and a continuous part arranged on an outer periphery side of the slit part, uniting the first and second parts into one body, and sealing an outer periphery end of the slit part, wherein the first and second parts sandwich therebetween to hold the entire peripheries of the membrane and the electrode received in the slit part into one body.

Abstract: A silicon nitride powder for sintering which, despite of its fine powdery form, shows a very small increase in the oxygen concentration with time and features excellent storage stability. The silicon nitride powder for sintering has a specific surface area of 5 to 30 m2/g, and is characterized by having a hydrophobicity (M value) of 30 or more and an increase in the oxygen concentration of 0.30% by mass or less after left to stand in the air of a humidity of 90% and 20° C. for 48 hours. The silicon nitride powder for sintering can be obtained by dry-pulverizing aggregated masses of the silicon nitride in an inert atmosphere in the presence of a silane coupling agent.

Abstract: An object of the present invention is to provide an etching liquid having a high silicon etch selectivity with respect to silicon-germanium and a high long term stability at a processing temperature, in surface processing during the production of various semiconductor devices, especially various silicon composite semiconductor devices containing silicon-germanium, and the problem is solved by a silicon etching liquid containing an alkaline compound, an aldehyde compound, and water, the aldehyde compound being a water-soluble aromatic aldehyde.

Abstract: The photochromic cyclic compound of the present invention is represented by Formula (1) below: in the formula, L is a divalent bridging group and PC is a divalent T-type photochromic basic structural group having a naphthopyran structure, where one end of the bridging group L is bonded to at least the 3-position of the naphthopyran structure.

Abstract: A treatment liquid for a semiconductor containing a group 6 metal, the treatment liquid containing hypobromite ions. Also provided is a treatment liquid for a semiconductor containing a group 6 metal, the treatment liquid characterized by being formed by adding and mixing at least a bromine-containing compound, an oxidizing agent, a base compound, and water, wherein relative to a total mass, an added amount of the bromine-containing compound is 0.008 mass % or more and less than 10 mass % as an amount of bromine element, and an added amount of the oxidizing agent is 0.1 mass ppm or more and 20 mass % or less; and pH at 25° C. is 8 or higher and 14 or lower. Further provided is a method for producing the treatment liquid for a semiconductor.

Abstract: Provided are: a semiconductor treatment liquid comprising high-purity isopropyl alcohol, wherein the concentration of the oxolane compound expressed in formula (1) below when held for 60 days in a nitrogen atmosphere at 50° C. in a SUS304 container is 25 ppb or less on a mass basis in relation to the isopropyl alcohol; and a method for manufacturing said semiconductor treatment liquid. In the formula, R1 and R2 each independently represent a hydrogen atom or a C1-3 alkyl group, and the total number of carbon atoms in R1 and R2 is 3 or less. R3 represents a hydrogen atom or an isopropyl group.

Abstract: A primer composition for optical article, the composition includes (A) an urethane prepolymer that is a reactant between (A1) a polyisocyanate compound having two or more isocyanate groups per molecule and (A2) at least one polyol compound having two or more hydroxyl groups per molecule and being selected from the group consisting of polycarbonate polyols, polyester polyols, and polycaprolactone polyols, and that has two or more isocyanate groups per molecule protected by a blocking agent; (B) an active hydrogen-containing compound having, per molecule, two or more active hydrogen functional groups having an active hydrogen; and (C) an organic solvent not having an active hydrogen.

Abstract: The present invention provides: a photochromic curable composition which contains (A) a (meth)acrylate composition that contains from 24 to 100% by mass of a polyfunctional (meth)acrylate which has three or more (meth)acryloyl groups in each molecule and (B) a photochromic compound that is obtained by bonding at least one specific naphthopyran to a long-chain group having a number average molecular weight of from 300 to 10,000; and a photochromic optical article which is obtained by polymerizing this photochromic curable composition.

Abstract: An alkaline water electrolysis vessel including: an anode-side frame body defining an anode chamber; a cathode-side frame body defining a cathode chamber; an ion-permeable separating membrane being arranged between the anode-side frame body and the cathode-side frame body, and separating the anode chamber and the cathode chamber; a gasket being sandwiched by the anode-side frame body and the cathode-side frame body to be held therebetween, and holding the periphery of the separating membrane; an anode being arranged in the anode chamber without being held by the gasket; a cathode being arranged in the cathode chamber without being held by the gasket; and an electroconductive first elastic body arranged in the anode chamber, wherein the anode is a flexible first porous plate; and the anode is arranged between the separating membrane and the first elastic body, and is pushed by the first elastic body toward the cathode.

Abstract: To prevent solidified aluminum chloride from adhering to and accumulating on a pipe and also prevent stress-corrosion cracking in the pipe, a method for producing trichlorosilane includes a cooling step of cooling a discharge gas that is discharged from a fluidized-bed reactor and that contains the trichlorosilane, the cooling step involving causing a fluid to flow through a space (4) inside a side wall (3) of a pipe (10), the pipe being a pipe for discharging the discharge gas from the fluidized-bed reactor, in such a manner that the side wall (3) has a surface (1a) having a temperature of not lower than 110° C.

Abstract: An alkaline water electrolysis vessel including: a first frame body defining an anode chamber and including an electroconductive first separating wall and a first flange part; a second frame body defining a cathode chamber and including an electroconductive second separating wall and a second flange part; an ion-permeable separating membrane being arranged between the first frame body and the second frame body, and separating the anode chamber and the cathode chamber; an anode being arranged in the anode chamber, and being electrically connected with the first separating wall; and a cathode being arranged in the cathode chamber, and being electrically connected with the second separating wall, the first frame body further including: a nickel-plating layer of no less than 40 µm in thickness, and being arranged at least on a wet part of a first surface of the first frame body which faces the anode chamber.

Abstract: Provided is a moisture curable polyurethane composition that is a moisture curable polyurethane having an isocyanate group on one end of a molecule thereof. The moisture curable polyurethane composition contains a moisture curable polyurethane (A) and an organic solvent (B). The moisture curable polyurethane (A) is obtainable by reacting a polyisocyanate compound having at least two isocyanate groups in a molecule thereof (A1) with a low-molecular weight polyol compound having at least two hydroxyl groups in a molecule thereof and having a number average molecular weight of 50-300 (A2). Also provided is a laminate including an optical substrate and a polyurethane resin layer comprising the moisture curable polyurethane composition.

Abstract: A separating membrane-gasket-protecting member assembly including: an ion-permeable separating membrane; a gasket holding a periphery of the membrane; and a frame-shaped protecting member holding the gasket; the protecting member including: a frame-shaped base body; and a frame-shaped lid member; the base body including: a receiving part being arranged in an inner periphery of the base body and receiving the gasket and the lid member; and a supporting part extending toward an inner periphery side of the base body and supporting the gasket received in the receiving part in a direction crossing a main face of the membrane; and the lid member having dimensions such that the lid member can be received in the receiving part, wherein the gasket and the lid member are received in the receiving part such that the gasket is sandwiched between the supporting part and the lid member.

Abstract: A photochromic curable composition comprising a radically polymerizable monomer having at least one oxetanyl group in one molecule, a photochromic compound and radically polymerizable monomers other than the above polymerizable monomer, and a photochromic cured body obtained by polymerizing the photochromic curable composition.

Abstract: A polycrystalline silicon block fracture device includes a fracturing part mechanically fracturing a polycrystalline silicon block material to produce a polycrystalline silicon fragment including a polycrystalline silicon powder having a particle size of 500 to 1000 ?m then discharging from a discharging port; a falling movement part continuous with a downstream of the fracturing part allowing said polycrystalline silicon fragment discharged from the discharging port to fall by gravity; a receiver part positioned at downstream of the falling movement part and receives the polycrystalline silicon fragment after falling through the falling movement part; and the falling movement part includes a suction removing part in which at least part of the polycrystalline silicon powder included in the polycrystalline silicon fragment is removed by suctioning to a different direction from falling direction; the suction removing part suctions at a suction rate of 1 to 20 m3/min.

Abstract: Provided is a method for producing a halogenated hydrocarbon magnesium compound, the method including bringing a halogenated hydrocarbon compound into contact with magnesium having a specific surface area of 1×10?5 to 2×10?4 m2/g. Also provided are methods for producing a tertiary alcohol compound and an organosilicon compound, wherein said production method is utilized.

Abstract: The present invention provides an optical composition from which an optical article having reduced poor appearance such as cloudiness and optical strain during lens base material production can be obtained, and when a photochromic compound is added, a photochromic cured body having excellent photochromism and mechanical strength can also be formed, and a polyrotaxane used therefor. The polyrotaxane has a composite molecular structure formed of an axle molecule and a plurality of cyclic molecules clathrating the axle molecule, satisfying at least one of (X) and (Y). (X): A side chain having a secondary or tertiary hydroxyl group is introduced into at least part of the cyclic molecule of the polyrotaxane. (Y): A side chain having a group represented by -A (A is an organic group, and contains at least one hydroxyl group) is introduced into at least part of the cyclic molecule of the polyrotaxane, and a pKa of the hydroxyl group of the compound represented by H-A is 6 or more and less than 14.

Abstract: A method for producing a quaternary alkylammonium hypochlorite solution includes a preparation step of preparing a quaternary alkylammonium hydroxide solution, and a reaction step of bringing the quaternary alkylammonium hydroxide solution into contact with chlorine, wherein a carbon dioxide concentration in a gas phase portion in the reaction step is 100 ppm by volume or less, and pH of a liquid phase portion in the reaction step is 10.5 or more.