Abstract: There is provided a composite gas separation membrane including a gas separation layer, which is formed to include a polyimide resin, on a support layer having gas permeability, in which the polyimide resin includes a repeating unit represented by the following Formula (I) in Formula (I), X represents a group having a specific structure represented by any of the following Formulae (I-a) to (I-h), in Formula (I), Y1 represents a group represented by the following Formula (II-a) or (II-b), and in Formulae (II-a) and (II-b), R3 represents a substituent group, A represents a dissociable group, p represents 0 or 1, p1 represents an integer of 0 to 2, and p2 represents an integer of 2 or greater.

Abstract: A gas separation membrane has a gas separation layer containing a cellulose resin, and an organopolysiloxane compound layer disposed on the gas separation layer in which Si ratio of the organopolysiloxane compound layer after immersion in chloroform to the organopolysiloxane compound layer before immersion in chloroform, the Si ratio being calculated by Mathematical expression (I), is 0.6 to 1.0.

Abstract: A gas separation membrane has a gas separation layer containing a poly(benzoxazole-imide) compound in which the poly(benzoxazole-imide) compound having structural units represented by General formulae (I) and (II), or structural units represented by General formulae (I), (II) and (III) satisfies a specific molar quantity condition. In the formulae, X and Y each represent a single bond or a specific divalent linking group; L represents a specific divalent linking group including a phenylene group; and R represents a specific group. A gas separation module and a gas separation method use the gas separation membrane. A gas separation apparatus includes the gas separation module.

Abstract: A gas separation membrane has a gas separation layer containing a crosslinked cellulose resin. The crosslinked cellulose resin has a particular linking structure in a crosslinked structure. The gas separation layer contains an organic solvent in a particular amount.

Abstract: A gas separation asymmetric membrane includes a porous layer having gas permeability; and a compact layer having gas separation capability which is formed on the porous layer in which the gas separation asymmetric membrane is formed using a polyimide compound which has a structural unit represented by Formula (I) and at least one structural unit selected from a structural unit represented by Formula (II) or a structural unit represented by Formula (III) and in which the viscosity, at 25° C., of a solution obtained by dissolving the polyimide compound in N-methylpyrrolidone at a concentration of 5% by mass is in a range of 2.2 to 22.0 mPa·sec, in the formula, X1 represents a group having a structure represented by Formula (I-a) or (I-b).

Abstract: A gas separation membrane having a gas separating layer containing a polybenzoxazole resin, in which the polybenzoxazole exhibits a solubility of 1% by mass or more to any one solvent selected from tetrahydrofuran, chloroform, methyl ethyl ketone, and N-methylpyrrolidone, at a temperature of 30° C., a gas separation module utilizing the gas separation membrane, a gas separation apparatus, and a gas separation method.

Abstract: Provided are a gas separation membrane which includes a gas separation layer formed to include a polyimide compound and in which the polyimide compound includes a repeating unit represented by the following Formula (I), a gas separation module, a gas separation device, and a gas separation method using the same. In Formula (I), R represents a group having a specific structure. R3 represents a specific substituent group. A1 to A3 represent a hydrogen atom or a specific substituent group, but all of A1 to A3 do not represent a hydrogen atom at the same time. In this case, at least one of R3, A1, A2, and A3 represents a specific polar group.

Abstract: There is provided a composite gas separation membrane including a gas separation layer, which is formed to include a polyimide resin, on a support layer having gas permeability, in which the polyimide resin includes a repeating unit represented by the following Formula (I) in Formula (I), X represents a group having a specific structure represented by any of the following Formulae (I-a) to (I-h), in Formula (I), Y1 represents a group represented by the following Formula (II-a) or (II-b), and in Formulae (II-a) and (II-b), R3 represents a substituent group, A represents a dissociable group, p represents 0 or 1, p1 represents an integer of 0 to 2, and p2 represents an integer of 2 or greater.

Abstract: A gas separation membrane having a gas separating layer containing a polybenzoxazole resin, in which the polybenzoxazole exhibits a solubility of 1% by mass or more to any one solvent selected from tetrahydrofuran, chloroform, methyl ethyl ketone, and N-methylpyrrolidone, at a temperature of 30° C., a gas separation module utilizing the gas separation membrane, a gas separation apparatus, and a gas separation method.

Abstract: The invention provides an ink composition including: (a) a polymer including a repeating unit (a1) having a group represented by the following Formula (1) and a repeating unit (a2) having a hydrophilic group; (b) a radical polymerizable compound; (c) water; and (d) a colorant; wherein, in Formula (1), each of Ra and Rb independently represents an alkyl group having from 1 to 4 carbon atoms; Ra and Rb may be bound to each other to form a 4- to 6-membered alicyclic structure; and * represents a bonding site.

Abstract: The present invention provides an ink composition including (Component A) a compound having two or more groups represented by Structural Formula (1), (Component B) a compound represented by Formula (2), (Component C) a coloring material, and (Component D) water: wherein in Structural Formula (1), Ra and Rb represent alkyl groups, and Ra and Rb may be bonded to each other to form a ring; and in Formula (2), Rb1 and Rb2 each represent a hydrogen atom, an alkyl group, an aryl group, or the like; Yb1 and Yb2 each represent —O—, —S—, —NRb3—, or the like; Gb1 and Gb2 each represent a hydrogen atom, a cyano group, an amide group, or the like; Rb1 and Rb2, and Gb1 and Gb2 may be respectively bonded to each other to form a ring; and at least one of Rb1, Rb2, Yb1, Yb2, Gb1 and Gb2 is substituted with a hydrophilic group.

Abstract: Provided is an ink composition capable of forming images having excellent water resistance, excellent solvent resistance and excellent adhesiveness to base materials, the ink composition including (Component A) a polymer containing a repeating unit (a1) having at least one of an aromatic ketone structure and an aliphatic 1,2-diketone structure, a repeating unit (a2) having at least one of a tertiary amine structure and a thiol structure, and a repeating unit (a3) having an ethylenically unsaturated double bond, and (Component B) a coloring material.

Abstract: An ink composition includes (component A) a compound having a group represented by the following Formula (1), (component B1) a monofunctional polymerizable compound, and (component C) a coloring material: wherein, in Formula (1), Ra and Rb each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; Ra and Rb may be bonded to each other to form a 4- to 6-membered alicyclic structure; Ra and Rb do not represent a hydrogen atom at the same time; and * represents a bonding site.

Abstract: The present invention provides an ink composition including (Component A) a compound having two or more groups represented by Structural Formula (1), (Component B) a compound represented by Formula (2), (Component C) a coloring material, and (Component D) water: wherein in Structural Formula (1), Ra and Rb represent alkyl groups, and Ra and Rb may be bonded to each other to form a ring; and in Formula (2), Rb1 and Rb2 each represent a hydrogen atom, an alkyl group, an aryl group, or the like; Yb1 and Yb2 each represent —O—, —S—, —NRb3—, or the like; Gb1 and Gb2 each represent a hydrogen atom, a cyano group, an amide group, or the like; Rb1 and Rb2, and Gb1 and Gb2 may be respectively bonded to each other to form a ring; and at least one of Rb1, Rb2, Yb1, Yb2, Gb1 and Gb2 is substituted with a hydrophilic group.

Abstract: Provided is an ink composition capable of forming images having excellent water resistance, excellent solvent resistance and excellent adhesiveness to base materials, the ink composition including (Component A) a polymer containing a repeating unit (a1) having at least one of an aromatic ketone structure and an aliphatic 1,2-diketone structure, a repeating unit (a2) having at least one of a tertiary amine structure and a thiol structure, and a repeating unit (a3) having an ethylenically unsaturated double bond, and (Component B) a coloring material.

Abstract: Provided is an ink composition having excellent dischargeability during image recording by an inkjet method and having excellent water resistance, solvent resistance, and adhesiveness to a recording medium of the recorded image. The ink composition includes a structure represented by the structural formula (A), a compound having at least any one of a residue formed by removing one hydrogen atom from a compound represented by the general formula (B1) and a residue formed by removing one hydrogen atom from a compound represented by the general formula (B2) in one molecule or plural molecules, and a coloring material.

Abstract: The invention provides an ink composition including: (a) a polymer including a repeating unit (a1) having a group represented by the following Formula (1) and a repeating unit (a2) having a hydrophilic group; (b) a radical polymerizable compound; (c) water; and (d) a colorant; wherein, in Formula (1), each of Ra and Rb independently represents an alkyl group having from 1 to 4 carbon atoms; Ra and Rb may be bound to each other to form a 4- to 6-membered alicyclic structure; and * represents a bonding site.