Abstract: A lubricating oil composition for an internal combustion engine, the composition including: a lubricating base oil comprising at least one mineral base oil or at least one synthetic base oil or any combination thereof, the lubricating base oil having a kinematic viscosity at 100° C. of 4.0 to 4.5 mm2/s and a NOACK evaporation loss at 250° C. of no more than 15 mass %; (A) a calcium-containing metallic detergent in an amount of no less than 1000 mass ppm and less than 2000 mass ppm in terms of calcium on the basis of the total mass of the composition; (B) a magnesium-containing metallic detergent in an amount of 100 to 1000 mass ppm in terms of magnesium on the basis of the total mass of the composition; and optionally (C) a viscosity index improver in an amount of less than 1 mass % on the basis of the total mass of the composition.

Abstract: [Problem] Provided is a see-through layered body which allows obtaining a projection type image display transparent screen with a wide viewing angle, and excellent image clarity and transparency. [Solving means] A see-through layered body according to the present invention comprises an intermediate resin film, two transparent substrates holding the intermediate resin film, wherein the intermediate resin film comprises a resin and from 0.0001 to 15% by mass of microparticles, having an average diameter of from 1 nm to 100 ?m, and the center plane average roughness SRa of outermost surfaces on both sides of the layered body is from 0.05 to 5.5 nm.

Abstract: A prepreg 10 comprises: a reinforcing fiber layer 3 including reinforcing fibers 1 and a resin composition 2 with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and surface layers 6a and 6b provided on the surfaces of the reinforcing fiber layer 3 and containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particles 4 having an average particle size of 5 to 50 ?m, wherein the polyamide resin particles 4 include the polyamide 1010 resin particle.

Abstract: A nonwoven sound absorbing material according to the present invention includes a nonwoven laminate formed of a stack of a plurality of sheets of a filament nonwoven fabric having a plurality of drawn filaments arranged and oriented in one direction, and the mode value of the diameter distribution of the plurality of drawn filaments is 1 to 4 ?m. The nonwoven sound absorbing material according to the present invention has improved sound absorption performance in a relatively low frequency band as compared to a conventional one.

Abstract: A method for producing an unsaturated hydrocarbon comprising: a dehydrogenation step of contacting a raw material gas containing at least one hydrocarbon selected from a group consisting of alkanes and olefins with a dehydrogenation catalyst containing a group 14 metal element and Pt to obtain a product gas containing at least one unsaturated hydrocarbon selected from the group consisting of olefins and conjugated dienes, and a regeneration step of contacting the dehydrogenation catalyst subjected to the dehydrogenation step with a regenerating gas containing molecular oxygen under a temperature condition of 310 to 450° C.

Abstract: [Problem] To provide a wholly aromatic liquid crystalline polyester resin having an excellent heat resistance and processability while having an extremely low dielectric tangent [Solving means] A wholly aromatic liquid crystalline polyester resin according to the present invention comprises, structural unit (I) derived from p-hydroxybenzoic acid, structural unit (II) derived from 6-hydroxy-2-naphthoic acid, structural unit (III) derived from an aromatic diol compound, structural unit (IV) derived from an aromatic dicarboxylic acid, wherein the composition ratio (mol %) of said structural units (I) to (IV) satisfies the following conditions: 2 mol %?structural unit (I)?9 mol % 40 mol %?structural unit (II)?75 mol % 9 mol %?structural unit (III)?24 mol % 9 mol %?structural unit (IV) 24 mol %.

Abstract: A lubricating oil composition including: a lubricating base oil; (A) a dispersant poly(meth)acrylate compound having a weight average molecular weight of 30,000 to 200,000 in an amount of 1 to 10 mass % on the basis of the total mass of the composition; and (B) a non-dispersant poly(meth)acrylate compound having a weight average molecular weight of 15,000 to 100,000 in an amount of no more than 15 mass % on the basis of the total mass of the composition, wherein the ratio MA/MB of the amount MA of the component (A) to the amount MB of the component (B) is 0.05 to 1; and the ratio MwB/MwA of the weight average molecular weight MwB of the component (B) to the weight average molecular weight MwA of the component (A) is 0.05 to 2.

Abstract: Disclosed is a lubricating oil composition comprising: a lubricating base oil comprising 0.5% to 70% by mass of an ester base oil based on the total amount of the lubricating base oil, and having a kinematic viscosity at 40° C. of 18 to 28 mm2/s; and an organic molybdenum compound in an amount of 100 to 1000 mass ppm in terms of the molybdenum element based on the total amount of the lubricating oil composition, wherein the lubricating oil composition has a kinematic viscosity at 40° C. of 50 mm2/s or less.

Abstract: A tetracarboxylic dianhydride includes: at least one acid dianhydride (A) selected from the group consisting of compounds each having an endo/exo type three-dimensional structure represented by a particular general formula and their enantiomeric compounds each having an exo/endo type three-dimensional structure; and/or an acid dianhydride (B) having an endo/endo type three-dimensional structure represented by a particular general formula, wherein a content of the acid dianhydride (B) in a total amount of the acid dianhydrides (A) and (B) is 30 to 100% by mole in a mole ratio.

Abstract: An antifogging member has an concave-convex surface defined by convex portions and concave portions, a Fourier-transformed image obtained by applying two-dimensional fast-Fourier transform processing to an observation image of the concave-convex surface exhibits a circular or annular pattern having an origin for which the absolute value of the wave number is 0 ?m?1 as the substantial center thereof, the convex portions and the concave portions extend in random directions in plan view, the average pitch of the concave portions and convex portions of the concave-convex surface is in the range of 50-250 nm, and the water contact angle on a smooth surface formed from the material constituting the concave-convex surface is 90 degrees or less. The antifogging member has high abrasion resistance, minimal haze, and a small difference in chromaticity and transmittance when viewed from oblique and perpendicular directions, and the transmittance and chromaticity thereof are not azimuth dependent.

Abstract: In a nonwoven fabric, uniaxially oriented bodies each including a thermoplastic resin layer and first and second adhesive layers respectively stacked on both surfaces of the thermoplastic resin layer and having melting points lower than that of a thermoplastic resin constituting the thermoplastic resin layer are warp-weft laminated with the first or second adhesive layer interposed between the uniaxially oriented bodies in such a manner that orientation axes thereof intersect each other. The nonwoven fabric has a mass per unit area of 5 to 13 g/m2, a layer composition ratio of the first adhesive layer, the thermoplastic resin layer, and the second adhesive layer in each of the uniaxially oriented bodies is 20/60/20 to 30/40/30, and an average value of bending resistances by a cantilever method is less than or equal to 50 mm.

Abstract: A method for producing an unsaturated hydrocarbon, comprising: a step of contacting a raw material gas containing an alkane with a dehydrogenation catalyst to obtain a product gas containing at least one unsaturated hydrocarbon selected from a group consisting of olefins and conjugated dienes, wherein the dehydrogenation catalyst contains at least one additive element selected from the group consisting of Na, K, and Ca, Al, Mg, a group 14 metal element, and Pt, and a content of the additive element is 0.05% by mass or more and 0.70% by mass or less based on a total mass of the dehydrogenation catalyst.

Abstract: A film member having a concave-convex structure is composed of a base member; a gas barrier layer formed on the base member; and a concave-convex structure layer formed on a surface of the gas barrier layer, wherein the surface of the gas barrier layer is formed of an inorganic material which is same as a material of the concave-convex structure layer, and the concave-convex structure layer is obtained from a precursor solution applied on the gas barrier layer. The film member having the concave-convex structure has an excellent adhesion property between the concave-convex structure layer and the gas barrier layer, and a high barrier property.

Abstract: A defoaming agent including a polymer, the polymer including: at least one first polymer chain including a polysiloxane structure represented by the following general formula (1); and at least one second polymer chain including a repeating unit represented by the following general formula (2) and bonded to the first polymer chain: wherein in the formula (1), repeating units may be in any order; each of R1 and R2 is independently a C1-18 organic group comprising no fluorine atom; at least one of R3 and R4 is the organic group comprising no less than 3 fluorine atoms; m is an integer of no less than 1; and n+m is 5 to 2000, wherein in the formula (2), X1 is a repeating unit obtainable by polymerization of an ethylenic unsaturated group; Y1 is a substituted or unsubstituted hydrocarbyl group; and Z1 is a linking group linking X1 and Y1.

Abstract: A tetracarboxylic dianhydride, which is a compound represented by the following general formula (1): [in the formula (1), A represents a divalent aromatic group in which the number of carbon atoms forming an aromatic ring is 6 to 30 or the like, and multiple R1s each independently represent a hydrogen atom or the like].

Abstract: The invention provides a refrigerating machine oil comprising as a base oil at least one oxygen-containing oil having a carbon/oxygen molar ratio of 2.5 or more and 5.8 or less, and being used in combination with a (Z)-1,1,1,4,4,4-hexafluoro-2-butene refrigerant.

Abstract: A conductive thermoplastic elastomer composition includes: a specific elastomer component; a clay; a paraffin oil; and a carbon-based filler having a BET specific surface area of 50 m2/g or more, wherein a content ratio of the clay is 20 parts by mass or less relative to 100 parts by mass of the elastomer component, and a content ratio of the paraffin oil is 1 to 65% by mass relative to a total amount of the composition.

Abstract: [Problem] Provided is a crystalline wholly aromatic polyester which is a polycondensate of an aromatic dicarboxylic acid and an aromatic diol and method for manufacture thereof.

Abstract: [Problem] Provided is a transparent screen which satisfies both the visibility of the projection light and the transmission light by anisotropically scattering and reflecting the projection light emitted from a light source. [Solving means] A transparent screen according to the present invention comprises a light diffusion layer including a binder and microparticles, said transparent screen having a scattered light brilliance profile characterized to meet the following conditions A to C: A: the emitted light relative brilliance in the 0° direction is from 50 to 95, when the entered light relative brilliance is 100; B: the emitted light relative brilliance in the ±5° direction is 1.1 or less, when the emitted light relative brilliance in the 0° direction is 100; and C: the emitted light relative brilliance in the ±50° direction is 0.0005 or higher, when the emitted light relative brilliance in the 0° direction is 100; when the brilliance is Y from the XYZ color system measured with a goniophotometer.

Abstract: The present invention provides a refrigerating machine oil comprising: an ester of a polyhydric alcohol and a fatty acid as a base oil; and an ether compound of a polyhydric alcohol, the refrigerating machine oil being used with an unsaturated hydrofluorocarbon refrigerant.