Abstract: A silica particle contains a nitrogen-containing compound, ?/? is 0.30 or greater and 0.80 or less, where ? and ? are the BET specific surface areas of the silica particle before and after baking at 350° C., respectively, and the absolute ratio of the triboelectric series of the silica particle before baking at 350° C. to that of the silica particle after baking at 350° C. is 0.10 1or greater and 0.85 or less.

Abstract: A polyimide precursor solution contains: an aqueous solvent containing water; particles; and a polyimide precursor, wherein the polyimide precursor has a high molecular weight region A containing a high molecular weight side maximum value and a low molecular weight region B containing a low molecular weight side maximum value in an elution curve obtained by gel permeation chromatography, a weight average molecular weight in the high molecular weight region A is 50,000 or more, a weight average molecular weight in the low molecular weight region B is 10,000 or more and 30,000 or less, and a value of a/(a+b) is 0.60 or more and 0.98 or less in which a represents an area of the high molecular weight region A and b represents an area of the low molecular weight region B.

Abstract: A silica particle is provided in which a pore size distribution curve obtained by nitrogen gas adsorption of the silica particle after baking at 350° C. has at least one peak at a pore diameter of 2 nm or less and at least one peak at a pore diameter of more than 2 nm and 50 nm or less, and D/B is 0.50 or greater and 2.50 or less, where D and B are the volumes of pores having a diameter of 2 nm or less and a diameter of 2 nm or more and 25 nm or less, respectively, determined from the pore size distribution curve obtained by nitrogen gas adsorption of the silica particle after baking at 350° C.

Abstract: Silica particles having silica base particles, a coating structure that coats the silica base particles and is composed of a reaction product of a trifunctional silane compound, and a nitrogen element-containing compound that has adhered to the coating structure and contains a molybdenum element, in which in a molybdenum element map created by SEM-EDX, a ratio of a total area of a region forming a lump having a long diameter of 500 nm or more is 5% or less to a total area of the molybdenum element.

Abstract: A manufacturing method of silica particles includes coating of forming a coating structure composed of a reaction product of a trifunctional silane compound on a surface of silica base particles, attaching a nitrogen element-containing compound containing a molybdenum element to the coating structure in a reaction solution which contains water, an alcohol, silica particles having the coating structure composed of the reaction product of the trifunctional silane compound, the nitrogen element-containing compound containing the molybdenum element, and at least one compound selected from the group consisting of ammonia and an amine and in which a total amount of ammonia and an amine is 0.2% by mass or more and 4.5% by mass or less, and drying of removing the water and the alcohol from the reaction solution.

Abstract: A pressure sensitive adhesive particle includes a pressure sensitive adhesive base particle that contains a styrene resin containing styrene and a vinyl monomer other than styrene as polymerization components, and a (meth)acrylate resin containing at least two (meth)acrylates as polymerization components, in which a mass ratio of the (meth)acrylates relative to a total of polymerization components of the (meth)acrylate resin is 90 mass % or more; and an external additive. The pressure sensitive adhesive particle has a surface having an arithmetic average roughness Ra within a range of 0.005 ?m to 0.100 ?m. The pressure sensitive adhesive particle has at least two glass transition temperatures, and the difference between the lowest glass transition temperature and the highest glass transition temperature among the glass transition temperatures of the pressure sensitive adhesive particle is 30° C. or more.

Abstract: A porous polyimide film has a ratio of a cross-sectional average micro pore diameter (?m) to a first surface micro pore diameter (?m) on one surface (the cross-sectional average micro pore diameter/the first surface micro pore diameter) of equal to or more than 5 and equal to or less than 10.

Abstract: A polyimide precursor solution includes a polyimide precursor that is a polymer of an aromatic tetracarboxylic dianhydride and an aromatic diamine compound, resin particles, an aqueous solvent containing water, and an amine compound having a boiling point of equal to or higher than 250° C. and equal to or lower than 300° C., in which a ratio of a volume of the resin particles to a volume of the amine compound (volume of resin particles/volume of amine compound) is equal to or more than 0.22 and equal to or less than 0.61.

Abstract: A particle-dispersed polyimide precursor solution contains: a polyimide precursor consisting of a polymer of a tetracarboxylic dianhydride and a diamine containing a fluorene-based diamine having a fluorene skeleton; particles; and an aqueous solvent containing water.

Abstract: There is provided a porous polyimide film in which the pore distribution width A represented by the following formula is 1.15 or less, the average pore diameter is within a range of 0.50 ?m to 3.0 ?m, and the air permeation speed is 30 seconds or less: A=(D84/D16)1/2 wherein D16 is the pore diameter at 16% cumulation from the small diameter side of pores, and D84 is the pore diameter at 84% cumulation from the small diameter side of pores.

Abstract: A method for producing a printed material includes providing pressure-induced phase transition particles on a recording medium having an arithmetic average roughness Ra of 0.07 ?m or more and 3.80 ?m or less to form a pressure-induced phase transition particle layer having a coverage C within a range of 30% to 90%; bonding the pressure-induced phase transition particles onto the recording medium; and folding the recording medium having the pressure-induced phase transition particles bonded thereon and pressure-bonding the folded recording medium, or pressure-bonding the recording medium having the pressure-induced phase transition particles bonded thereon and another recording medium placed on top of each other.

Abstract: A polyimide precursor solution contains a polyimide precursor, particles, and a water-based solvent that contains an amine compound (A), an organic solvent (B) other than the amine compound (A) and amide compounds, and water, in which a boiling point of the organic solvent (B) is higher than a boiling point of the amine compound (A), and is 200° C. or higher and 300° C. or lower.

Abstract: A polyimide precursor film contains a polyimide precursor, in which a total content of a solvent containing water and a solvent other than water in the polyimide precursor film is 5 mass % or more and 40 mass % or less, and a mass ratio of water to the solvent other than water in the polyimide precursor film is 0 or more and 2.5 or less.

Abstract: A polyimide precursor solution contains a polyimide precursor having a weight average molecular weight of 40,000 or more, and an aqueous solvent containing a tertiary amine compound and water, in which a viscosity of the polyimide precursor solution after a storage at 25° C. for 14 days is 50% or more and 200% or less with respect to a viscosity of the polyimide precursor solution before the storage.

Abstract: A polyimide precursor solution contains: an aqueous solvent containing water; particles; and a polyimide precursor, wherein the polyimide precursor has a high molecular weight region A containing a high molecular weight side maximum value and a low molecular weight region B containing a low molecular weight side maximum value in an elution curve obtained by gel permeation chromatography, a weight average molecular weight in the high molecular weight region A is 50,000 or more, a weight average molecular weight in the low molecular weight region B is 10,000 or more and 30,000 or less, and a value of a/(a+b) is 0.60 or more and 0.98 or less in which a represents an area of the high molecular weight region A and b represents an area of the low molecular weight region B.

Abstract: A particle-dispersed polyimide precursor solution contains a polyimide precursor having a unit represented by the following formula (I), particles, and a solvent, in which the particle-dispersed polyimide precursor solution satisfies both the following conditions (1) and (2), (in the formula (I), A represents a tetravalent organic group, and B represents a divalent organic group represented by any of the following formulas (B1) to (B4)), (in the formulas (B1) to (B4), Ar1, Ar10, and Ar11 each independently represent a trivalent aromatic group which may have a substituent, Ar2, Ar4, Ar5, Ar7 and Ar8 each independently represent a divalent aromatic group which may have a substituent, Ar3 and Ar6 each independently represent a tetravalent aromatic group which may have a substituent or a group represented by the following formula (II), Ar9 represents a divalent aromatic group which may have a substituent or a group represented by the following formula (III), X1 to X7 each independently represent N

Abstract: A separator for a non-aqueous secondary battery includes: a polyimide porous film; and adhesive resin particles that are attached to a surface of the polyimide porous film and have a responsiveness to at least one of pressure and heat.

Abstract: A particle-dispersed polyimide precursor solution contains: a polyimide precursor consisting of a polymer of a tetracarboxylic dianhydride and a diamine containing a fluorene-based diamine having a fluorene skeleton; particles; and an aqueous solvent containing water.

Abstract: An all-solid-state battery includes a positive electrode active material layer containing a positive electrode active material; a negative electrode active material layer containing a negative electrode active material; and a solid electrolyte layer containing a solid electrolyte and a porous polyimide film which holds the solid electrolyte. The porous polyimide film has a void ratio of 60% or more and 80% or less and a pore diameter of 0.1 ?m or more and 10 ?m or less.

Abstract: A method for producing a printed material includes providing pressure-induced phase transition particles on a recording medium having an arithmetic average roughness Ra of 0.07 ?m or more and 3.80 ?m or less to form a pressure-induced phase transition particle layer having a coverage C within a range of 30% to 90%; bonding the pressure-induced phase transition particles onto the recording medium; and folding the recording medium having the pressure-induced phase transition particles bonded thereon and pressure-bonding the folded recording medium, or pressure-bonding the recording medium having the pressure-induced phase transition particles bonded thereon and another recording medium placed on top of each other.