Abstract: There is provided a pattern forming method that includes an exposure step of exposing a photosensitive film to laser light; and a development step of developing the photosensitive film after the exposure to obtain a pattern, where the photosensitive film contains at least one precursor selected from the group consisting of a polyimide precursor and a polybenzoxazole precursor, and an onium salt.

Abstract: There are provided a photosensitive resin composition containing at least one precursor selected from the group consisting of a polyimide precursor and a polybenzoxazole precursor, a compound having a sulfurous ester structure, and a photoradical polymerization initiator, and satisfies at least one of the following conditions 1, . . . , or 3; a pattern forming method using a photosensitive film formed from the photosensitive resin composition; a cured film formed from the photosensitive resin composition; a laminate including the cured film; and a device having the cured film or the laminate. the condition 1: the precursor contains a radically polymerizable group, the condition 2: the compound having a sulfurous ester structure contains a radically polymerizable group, and the condition 3: the photosensitive resin composition further contains a compound containing a radically polymerizable group, other than the precursor and the compound having a sulfurous ester structure.

Abstract: The carbon black composition for manufacturing a particulate magnetic recording medium contains carbon black, vinyl chloride resin containing one or more epoxy groups, the secondary monoamine denoted by formula 1, and solvent, wherein, in formula 1, each of R1 and R2 independently denotes an alkyl group branching off at a carbon atom, the carbon atom being present at an ?-position relative to an amine nitrogen atom, and having a main structure with 7 or fewer carbon atoms, it being possible for the alkyl group denoted by R1 to be in the form of a cyclic structure, possible for the alkyl group denoted by R2 to be in the form of a cyclic structure, and possible for the alkyl group denoted by R1 and the alkyl group denoted by R2 be connected to form a cyclic structure, with neither R1 nor R2 containing a hydroxyl group.

Abstract: The magnetic recording medium contains, in a magnetic layer, a fatty acid ester and a polyester resin having a number average molecular weight of greater than or equal to 1,000 but less than 20,000, and containing a structural unit derived from a polyvalent carboxylic acid and a structural unit derived from a polyol, as well as 10 mol % to 50 mol % of a structural unit, derived from a cyclic polyvalent carboxylic acid selected from the group consisting of an alicyclic polyvalent carboxylic acid and an aromatic polyvalent carboxylic acid, per 100 mol % of a combined total of the above structural units, and one or more partial structures selected from the group consisting of the following partial structures: wherein each of L1 and L2 independently denotes a divalent connecting group, and each of Z1 and Z2 independently denotes a monovalent group denoted by —OM or a monovalent group denoted by —O?A+.

Abstract: The metal oxide particle dispersion for manufacturing a particulate magnetic recording medium contains metal oxide particles, solvent, and a polyester compound having one or more groups selected from the group consisting of a carboxyl group and a salt thereof, a phosphoric acid group and a salt thereof, a hydroxyl group and a nitrogen-substituted alkylene group, but substantially not containing ferromagnetic powder.

Abstract: An aspect of the present invention relates to a composition, which is a composition for a magnetic recording medium and comprises an isocyanate compound in the form of an adduct of a polyhydroxyl compound having one or more aromatic carbon rings and three or more hydroxyl groups per molecule with a polyisocyanate having two or more isocyanate groups per molecule.

Abstract: The magnetic recording medium has a magnetic layer containing ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is hexagonal ferrite powder containing, based on number of particles, greater than or equal to 80% isotropic particles that satisfy the relation 1: major axis length/minor axis length <1.2, with an average particle size of the hexagonal ferrite powder being less than or equal to 30 nm, and a squareness in a vertical direction of the magnetic layer being greater than or equal to 0.65 but less than or equal to 1.00.

Abstract: There is provided an electrophoretic particle which contains a core material particle formed of a composition containing a resin, a nitrogen-containing heterocyclic compound having any one of an imino group, a methylol group and an alkoxymethyl group in the molecule and a heterocyclic ring having a nitrogen atom, and a coloring agent.

Abstract: The magnetic recording medium comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, and further comprises a compound denoted by Formula (1): wherein, in Formula (1), X denotes —O—, —S—, or NR1—; each of R and R1 independently denotes a hydrogen atom or a monovalent substituent; L denotes a divalent connecting group; Z denotes a partial structure of valence n comprising at least one group selected from the group consisting of carboxyl groups and carboxylate groups; m denotes an integer of greater than or equal to 2, and n denotes an integer of greater than or equal to 1.

Abstract: The magnetic recording medium composition contains ferromagnetic powder, binder, and a crosslinkable component selected from the group consisting of a component capable of forming a crosslinking structure by a radical reaction, a component capable of forming a crosslinking structure by an ionic reaction, and a component capable of forming a crosslinking structure by a pericyclic reaction, wherein the crosslinkable component contains at least polyester, and the polyester has a weight average molecular weight ranging from 1,000 to 20,000, as well as contains, per molecule, one or more acidic groups, and one or more reactive groups selected from the group consisting of a radical reactive group, an ionic reactive group, and a pericyclic reactive group.

Abstract: An aspect of the present invention relates to a composition, which is a composition for a magnetic recording medium and comprises an isocyanate compound in the form of an adduct of a polyhydroxyl compound having one or more aromatic carbon rings and three or more hydroxyl groups per molecule with a polyisocyanate having two or more isocyanate groups per molecule.

Abstract: The present invention provides a barrier laminate, comprising an organic layer and an inorganic barrier layer adjacent to the organic layer, characterized in that the organic layer comprises a polymer obtained by polymerizing a polymerizable compound having two or more polymerizable groups per molecule, and has a refractive index of 1.60 or higher, and in that the refractive index of the inorganic barrier layer is 1.60 or higher. The gas barrier film exhibits high barrier properties and transparence.

Abstract: The magnetic recording medium contains, in a magnetic layer, a fatty acid ester and a polyester resin having a number average molecular weight of greater than or equal to 1,000 but less than 20,000, and containing a structural unit derived from a polyvalent carboxylic acid and a structural unit derived from a polyol, as well as 10 mol % to 50 mol % of a structural unit, derived from a cyclic polyvalent carboxylic acid selected from the group consisting of an alicyclic polyvalent carboxylic acid and an aromatic polyvalent carboxylic acid, per 100 mol % of a combined total of the above structural units, and one or more partial structures selected from the group consisting of the following partial structures: wherein each of L1 and L2 independently denotes a divalent connecting group, and each of Z1 and Z2 independently denotes a monovalent group denoted by —OM or a monovalent group denoted by —O?A+.

Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the magnetic layer further comprises a compound which has a weight average molecular weight of equal to or more than 1,000 but less than 20,000 and is denoted by formula (1): wherein, in formula (1), A1 denotes a monovalent polymer group, each of R1 and R2 independently denotes a single bond or a divalent connecting group, R11 denotes a hydrogen atom or a monovalent substituent, m denotes an integer of equal to or greater than 2, multiple instances of R1, R2, A1, and R11 that are present can be identical or different, A2 denotes a hydrogen atom or a monovalent substituent denoted by —OR3—Z, R3 denotes a single bond or a divalent connecting group, Z denotes a monovalent acid group, among multiple instances of A2 that are present, at least one denotes a monovalent group denoted by —O—R3—Z, and X denotes a connecting group of

Abstract: The metal oxide particle dispersion for manufacturing a particulate magnetic recording medium contains metal oxide particles, solvent, and a polyester compound having one or more groups selected from the group consisting of a carboxyl group and a salt thereof, a phosphoric acid group and a salt thereof, a hydroxyl group and a nitrogen-substituted alkylene group, but substantially not containing ferromagnetic powder.

Abstract: The carbon black composition for manufacturing a particulate magnetic recording medium contains carbon black, vinyl chloride resin containing one or more epoxy groups, the secondary monoamine denoted by formula 1, and solvent, wherein, in formula 1, each of R1 and R2 independently denotes an alkyl group branching off at a carbon atom, the carbon atom being present at an ?-position relative to an amine nitrogen atom, and having a main structure with 7 or fewer carbon atoms, it being possible for the alkyl group denoted by R1 to be in the form of a cyclic structure, possible for the alkyl group denoted by R2 to be in the form of a cyclic structure, and possible for the alkyl group denoted by R1 and the alkyl group denoted by R2 be connected to form a cyclic structure, with neither R1 nor R2 containing a hydroxyl group.

Abstract: The magnetic recording medium has a magnetic layer containing ferromagnetic powder and binder on a nonmagnetic support, wherein the ferromagnetic powder is hexagonal ferrite powder containing, based on number of particles, greater than or equal to 80% isotropic particles that satisfy the relation 1: major axis length/minor axis length <1.2, with an average particle size of the hexagonal ferrite powder being less than or equal to 30 nm, and a squareness in a vertical direction of the magnetic layer being greater than or equal to 0.65 but less than or equal to 1.00.

Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the magnetic layer further comprises a compound which has a weight average molecular weight of equal to or more than 1,000 but less than 20,000 and is denoted by formula (1): wherein, in formula (1), A denotes a monovalent substituent, R1 denotes a single bond or a divalent connecting group, and m denotes an integer ranging from 2 to 4, multiple instances of A and R1 that are present can be identical or different, at least one of the multiple instances of A that are present denotes a monovalent polymer group and X denotes a heterocyclic group of valence m.

Abstract: The present invention provides a barrier laminate with enhanced heat resistance performance, comprising at least one organic layer and at least one inorganic barrier layer, the organic layer being formed by curing a polymerizable composition comprising a polymerizable compound having two or more polymerizable groups, and the total quantity of uncured component in the organic layer being 1.5 weight % or less of the total weight of the organic layer, and a novel polymerizable compound that can preferably used as the polymerizable compound, which is denoted by general formula (11): in general formula (11), R21 denotes hydrogen atom or methyl group; R22 denotes methyl group or cyclohexyl group; n denotes an integer of 0 to 2; and each instance of X denotes a group comprising a polymerizable group.

Abstract: The magnetic recording medium composition contains ferromagnetic powder, binder, and a crosslinkable component selected from the group consisting of a component capable of forming a crosslinking structure by a radical reaction, a component capable of forming a crosslinking structure by an ionic reaction, and a component capable of forming a crosslinking structure by a pericyclic reaction, wherein the crosslinkable component contains at least polyester, and the polyester has a weight average molecular weight ranging from 1,000 to 20,000, as well as contains, per molecule, one or more acidic groups, and one or more reactive groups selected from the group consisting of a radical reactive group, an ionic reactive group, and a pericyclic reactive group.