Abstract: There is provided a copolymer for suppressing protein adsorption, which contains a constitutional unit (a) represented by Formula 1 and a constitutional unit (b) represented by Formula 2, and which is used for producing an article that comes in contact with a protein. In the formula, R1 represents a hydrogen atom or a methyl group, R2 represents an OR33, a halogen atom, COR34, COOR35, CN, CONR36R37, or R38, where R33 to R37 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alicyclic group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted non-aromatic heterocyclic group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted alkaryl group, or a substituted or unsubstituted organosilyl group, and R38 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group.

Abstract: The present invention relates to a curable composition containing a thiol compound (A) having at least two thiol groups in a molecule thereof, an isocyanate compound (B) having at least two isocyanate groups in a molecule thereof, a phosphine compound (C), an acid (D) having an acid dissociation constant (pKa) of 3 or less relative to water, and a Michael acceptor (E); wherein, the content of the phosphine compound (C) is 1.3% by mass or less based on 100% by mass of the curable composition.

Abstract: An oil for a carbon fiber precursor acrylic fiber including: a hydroxybenzoate ester (A) indicated by formula (1a); an amino-modified silicone (H) indicated by formula (3e); and an organic compound (X) which is compatible with the hydroxybenzoate ester (A), in which a residual mass rate R1 at 300° C. in thermal mass analysis in an air atmosphere is 70-100 mass % inclusive, and which is a liquid at 100° C., and a carbon fiber precursor acrylic fiber bundle to which the oil for a carbon fiber precursor acrylic fiber is adhered.

Abstract: The present invention relates to an oil agent for carbon-fiber precursor acrylic fiber, including at least one type of compound selected from groups of a hydroxybenzoate (Compound A), a cyclohexanedicarboxylic acid (Compound B and C), a cyclohexanedimethanol and/or a cyclohexanediol and a fatty acid (Compound D and E) and an isophoronediisocyanate-aliphatic alcohol adduct (Compound F), an oil composition for carbon-fiber precursor acrylic fiber, a processed-oil solution for carbon-fiber precursor acrylic fiber, and a method for producing a carbon-fiber precursor acrylic fiber bundle, and a carbon-fiber bundle using the carbon-fiber precursor acrylic fiber bundle.

Abstract: The present invention relates to a curable composition containing a thiol compound (A) having at least two thiol groups in a molecule thereof, an epoxy compound (B2) having at least two epoxy groups in a molecule thereof, a phosphine compound (C), and an acid (D); and, a curable composition containing the thiol compound (A), an epoxy compound (B1) having at least one epoxy group in a molecule thereof, an isocyanate compound (E2) having at least two isocyanate groups in a molecule thereof, a phosphine compound (C), and an acid (D).

Abstract: The present invention relates to a curable composition containing a thiol compound (A) having at least two thiol groups in a molecule thereof, an isocyanate compound (B) having at least two isocyanate groups in a molecule thereof, a phosphine compound (C), an acid (D) having an acid dissociation constant (pKa) of 3 or less relative to water, and a Michael acceptor (E); wherein, the content of the phosphine compound (C) is 1.3% by mass or less based on 100% by mass of the curable composition.

Abstract: The purpose of the present invention is to provide a method whereby deposits which have occurred on the surfaces of a fiber bundle during flameproofing treatment of a carbon fiber-precursor acrylic fiber bundle can be efficiently removed prior to carbonization treatment at high temperature. The method for production of carbon fiber bundle includes a step in which, after a carbon fiber-precursor acrylic fiber bundle has been heated and undergone flameproofing treatment, the fiber bundle is subjected to a plasma treatment involving contact with a plasma gas in gas phase, or to an ultraviolet treatment involving irradiation with ultraviolet in gas phase; and a step in which the fiber bundle having undergone the plasma treatment or the ultraviolet treatment is subjected to a carbonization treatment.

Abstract: An oil for a carbon fiber precursor acrylic fiber including: a hydroxybenzoate ester (A) indicated by formula (1a); an amino-modified silicone (H) indicated by formula (3e); and an organic compound (X) which is compatible with the hydroxybenzoate ester (A), in which a residual mass rate R1 at 300° C. in thermal mass analysis in an air atmosphere is 70-100 mass % inclusive, and which is a liquid at 100° C., and a carbon fiber precursor acrylic fiber bundle to which the oil for a carbon fiber precursor acrylic fiber is adhered.

Abstract: The present invention relates to a carbon-fiber-precursor acrylic fiber bundle with an oil composition adhering thereto, wherein the oil composition comprises an amino-modified silicone, an aromatic ester compound (1) having a structure represented by the following formula (1), and an aromatic ester compound (2) having a structure represented by the following formula (2), the amino-modified silicone, the aromatic ester compound (1), and the aromatic ester compound (2) meet the specific requirements, the process for producing the same, an oil composition carbon-fiber-precursor acrylic fiber, and an oil composition dispersion for carbon-fiber-precursor acrylic fiber.

Abstract: The purpose of the present invention is to provide a method whereby deposits which have occurred on the surfaces of a fiber bundle during flameproofing treatment of a carbon fiber-precursor acrylic fiber bundle can be efficiently removed prior to carbonization treatment at high temperature. The method for production of carbon fiber bundle includes a step in which, after a carbon fiber-precursor acrylic fiber bundle has been heated and undergone flameproofing treatment, the fiber bundle is subjected to a plasma treatment involving contact with a plasma gas in gas phase, or to an ultraviolet treatment involving irradiation with ultraviolet in gas phase; and a step in which the fiber bundle having undergone the plasma treatment or the ultraviolet treatment is subjected to a carbonization treatment.

Abstract: An object of the present invention is to provide an oil agent composition which can improve the reduction in operability occurring when an oil agent composition containing a silicone compound is used as the main component and the reduction in the physical properties of the carbon fiber bundle occurring when a non-silicone-based oil agent composition is used. The oil agent composition for acrylic precursor fibers for carbon fibers of the present invention contains 1 to 10 wt % of a modified polydimethylsiloxane including a unit having a specific alkyl chain, at least one unit selected from the group consisting of a unit having a specific polyethylene oxide chain, a unit having a specific polyglycerin chain, and a unit having a specific polyether chain, and optionally a unit having a specific polydimethylsiloxyalkyl chain.

Abstract: The present invention relates to an oil agent for carbon-fiber precursor acrylic fiber, including at least one type of compound selected from groups of a hydroxybenzoate (Compound A), a cyclohexanedicarboxylic acid (Compound B and C), a cyclohexanedimethanol and/or a cyclohexanediol and a fatty acid (Compound D and E) and an isophoronediisocyanate-aliphatic alcohol adduct (Compound F), an oil composition for carbon-fiber precursor acrylic fiber, a processed-oil solution for carbon-fiber precursor acrylic fiber, and a method for producing a carbon-fiber precursor acrylic fiber bundle, and a carbon-fiber bundle using the carbon-fiber precursor acrylic fiber bundle.

Abstract: The present invention relates to a carbon-fiber-precursor acrylic fiber bundle with an oil composition adhering thereto, wherein the oil composition comprises an amino-modified silicone, an aromatic ester compound (1) having a structure represented by the following formula (1), and an aromatic ester compound (2) having a structure represented by the following formula (2), the amino-modified silicone, the aromatic ester compound (1), and the aromatic ester compound (2) meet the specific requirements, the process for producing the same, an oil composition carbon-fiber-precursor acrylic fiber, and an oil composition dispersion for carbon-fiber-precursor acrylic fiber.

Abstract: An object of the present invention is to provide an oil agent composition which can improve the reduction in operability occurring when an oil agent composition containing a silicone compound is used as the main component and the reduction in the physical properties of the carbon fiber bundle occurring when a non-silicone-based oil agent composition is used. The oil agent composition for acrylic precursor fibers for carbon fibers of the present invention contains 1 to 10 wt % of a modified polydimethylsiloxane including a unit having a specific alkyl chain, at least one unit selected from the group consisting of a unit having a specific polyethylene oxide chain, a unit having a specific polyglycerin chain, and a unit having a specific polyether chain, and optionally a unit having a specific polydimethylsiloxyalkyl chain.