Abstract: A nanodiamond particle dispersion including nanodiamond particles highly dispersed in an organic solvent is provided. A nanodiamond particle dispersion of the present invention includes nanodiamond particles dispersed in an organic solvent, in which the nanodiamond particles have a silane compound (excluding a silane compound having a (meth)acryloyl group) bonded to a surface of the nanodiamond particles, the organic solvent has an SP value from 8.0 to 14.0 (cal/cm3)1/2, and the nanodiamond particles are dispersed with a particle diameter (D50) from 2 to 100 nm. The organic solvent is preferably at least one type of organic solvent selected from ketones, ethers, alcohols, and carbonates.

Abstract: Provided is a nanodiamond dispersion composition having excellent dispersibility of nanodiamond particles in an organic dispersion medium. A nanodiamond dispersion composition including an organic dispersion medium, nanodiamond particles dispersed in the organic dispersion medium, and a fatty acid ester dispersing agent, the nanodiamond particles being surface-modified by a surface-modifying group or compound containing an organic group. The fatty acid ester dispersing agent preferably has a mass loss rate of 30% or less when held in an air atmosphere at a temperature of 200° C. for 180 minutes.

Abstract: Provided is a nanodiamond dispersion composition having excellent dispersibility of nanodiamond particles in an organic dispersion medium even when the organic dispersion medium has a small SP value. The nanodiamond dispersion composition according to an embodiment of the present invention includes an organic dispersion medium, nanodiamond particles dispersed in the organic dispersion medium, and a fatty acid ester dispersing agent. The fatty acid ester dispersing agent preferably has a mass loss rate of 20% or less when held in an air atmosphere at a temperature of 200° C. for 180 minutes. The fatty acid ester dispersing agent preferably has an acid value of 40 mgKOH/g or less.

Abstract: Provided is a battery electrolytic solution in which a nanocarbon material is highly dispersed. The battery electrolytic solution contains: a dispersion medium; an electrolyte dissolved in the dispersion medium; and a nanocarbon material dispersed with an average dispersed particle size of 500 nm or less in the dispersion medium. The battery electrolytic solution preferably contains the nanocarbon material in an amount from 10 to 100000 mass ppm. The nanocarbon material is preferably at least one selected from the group consisting of a nanodiamond, a fullerene, a graphene, a graphene oxide, a nanographite, a carbon nanotube, a carbon nanofilament, an onion-like carbon, a diamond-like carbon, an amorphous carbon, a carbon black, a carbon nanohorn, and a carbon nanocoil.

Abstract: An anti-reflection film (X) of the present invention includes a laminated structure including a substrate (11), a hard coat layer (12), and an anti-reflection layer (13), and a luminous reflectance of the anti-reflection layer (13) side is 2% or less. The anti-reflection layer (13) includes a surface (13a) having a coefficient of kinetic friction of 0.3 or less and a coefficient of static friction of 0.3 or less. In addition, in the anti-reflection film (X), after a rubbing test performed on the surface (13a) using steel wool #0000 as a rubbing material under conditions of a load of 200 g/cm2, a rubbing stroke length of 10 cm, and reciprocations of 1000 times, a difference of the haze value (%) after the rubbing test from the haze value (%) before the rubbing test is 0.1 or less. Such an anti-reflection film is suitable for achieving high scratch resistance together with high anti-reflective properties.

Abstract: The present invention is to provide a surface-modified nanodiamond having excellent affinity for an organic solvent and a resin and having high dispersibility in an organic solvent and in a resin. The surface-modified nanodiamond according to an embodiment of the present invention has a structure in which a surface of a nanodiamond particle is modified by a group represented by Formula (1) below. In Formula (1), R1 represents an aliphatic hydrocarbon group having 6 or more carbons. R2 and R3 may be the same or different and are each a hydrogen atom, an aliphatic hydrocarbon group having from 1 to 3 carbons, or a group represented by Formula (2) below.

Abstract: To provide a surface-modified nanodiamond including an N-substituted or unsubstituted amino group having excellent reactivity with other compounds; and having excellent dispersibility in dispersion media and resins. The surface-modified nanodiamond according to the present invention is a surface-modified nanodiamond including a surface-modifying group on a surface of a nanodiamond particle, wherein the surface-modifying group includes a group represented by Formula (1) below, wherein reference signs in Formula (1) below are as described in the present specification.

Abstract: A resin composition (X), which is a curable resin composition according to the present invention, contains a curable resin component (10), a surface-modified nanodiamond (20), and an organic medium. The surface-modified nanodiamond (20) includes a ND particle (21), which is a nanodiamond particle, and a silane coupling agent (22). The silane coupling agent (22) has a (meth)acryloyl-containing organic chain and is bonded to the ND particle (21). The resin composition (X) is suitable for forming a nanodiamond-dispersed cured resin portion having both high transparency and high scratch resistance. An optical element according to the present invention has a light-transmitting region and includes a cured resin portion, which is a cured product of the resin composition (X), in at least part of the light-transmitting region. The optical element is advantageous for actually providing an optical element including a cured resin portion or cured resin layer having both high transparency and high scratch resistance.

Abstract: A nanodiamond particle dispersion including nanodiamond particles highly dispersed in an organic solvent is provided. A nanodiamond particle dispersion of the present invention includes nanodiamond particles dispersed in an organic solvent, in which the nanodiamond particles have a silane compound (excluding a silane compound having a (meth)acryloyl group) bonded to a surface of the nanodiamond particles, the organic solvent has an SP value from 8.0 to 14.0 (cal/cm3)1/2, and the nanodiamond particles are dispersed with a particle diameter (D50) from 2 to 100 nm. The organic solvent is preferably at least one type of organic solvent selected from ketones, ethers, alcohols, and carbonates.

Abstract: Provided is a plating film that can exhibit a high gloss and a low contact resistance value. The plating film according to an embodiment of the present invention is a plating film including a noble metal matrix and nanodiamond particles dispersed in the noble metal matrix. The plating film according to an embodiment of the present invention preferably has a gloss at an incident angle of 60° of not less than 250 GU and/or a contact resistance value at a load of 50 gf of not greater than 1 m?, and a difference between a contact resistance value at a load of 50 gf and a contact resistance value at a load of 5 gf of not greater than 5 m?. The nanodiamond particles are preferably nanodiamond particles including a surface-modifying group containing a sterically repulsive group and particularly preferably nanodiamond particles including a surface-modifying group containing a polyglycerol chain.

Abstract: An anti-reflection film (X) of the present invention includes a laminated structure including a substrate (11), a hard coat layer (12), and an anti-reflection layer (13). The anti-reflection layer (13) contains a curable resin, low-refractive-index particles, and nanodiamond particles. The anti-reflection layer (13) may further contain a fluorine-containing curable compound. Such an anti-reflection film is suitable for achieving high scratch resistance together with high anti-reflective properties.

Abstract: The present invention is to provide a surface-modified nanodiamond having excellent affinity for an organic solvent and a resin and having high dispersibility in an organic solvent and in a resin. The surface-modified nanodiamond according to an embodiment of the present invention has a structure in which a surface of a nanodiamond particle is modified by a group represented by Formula (1) below. In Formula (1), R1 represents an aliphatic hydrocarbon group having 6 or more carbons. R2 and R3 may be the same or different and are each a hydrogen atom, an aliphatic hydrocarbon group having from 1 to 3 carbons, or a group represented by Formula (2) below.

Abstract: An anti-reflection film (X) of the present invention includes a laminated structure including a substrate (11), a hard coat layer (12), and an anti-reflection layer (13), and a luminous reflectance of the anti-reflection layer (13) side is 2% or less. The anti-reflection layer (13) includes a surface (13a) having a coefficient of kinetic friction of 0.3 or less and a coefficient of static friction of 0.3 or less. In addition, in the anti-reflection film (X), after a rubbing test performed on the surface (13a) using steel wool #0000 as a rubbing material under conditions of a load of 200 g/cm2, a rubbing stroke length of 10 cm, and reciprocations of 1000 times, a difference of the haze value (%) after the rubbing test from the haze value (%) before the rubbing test is 0.1 or less. Such an anti-reflection film is suitable for achieving high scratch resistance together with high anti-reflective properties.

Abstract: To provide a surface-modified nanodiamond including an N-substituted or unsubstituted amino group having excellent reactivity with other compounds; and having excellent dispersibility in dispersion media and resins. The surface-modified nanodiamond according to the present invention is a surface-modified nanodiamond including a surface-modifying group on a surface of a nanodiamond particle, wherein the surface-modifying group includes a group represented by Formula (1) below, wherein reference signs in Formula (1) below are as described in the present specification.

Abstract: A resin composition (X), which is a curable resin composition according to the present invention, contains a curable resin component (10), a surface-modified nanodiamond (20), and an organic medium. The surface-modified nanodiamond (20) includes a ND particle (21), which is a nanodiamond particle, and a silane coupling agent (22). The silane coupling agent (22) has a (meth)acryloyl-containing organic chain and is bonded to the ND particle (21). The resin composition (X) is suitable for forming a nanodiamond-dispersed cured resin portion having both high transparency and high scratch resistance. An optical element according to the present invention has a light-transmitting region and includes a cured resin portion, which is a cured product of the resin composition (X), in at least part of the light-transmitting region. The optical element is advantageous for actually providing an optical element including a cured resin portion or cured resin layer having both high transparency and high scratch resistance.

Abstract: Provided is a film, sheet, plate, or other such formed article having excellent transparency made of a copolymer obtained from a cyclic olefin monomer and an ?-olefin monomer. The present invention provides a formed article made from a copolymer having Tg of 170° C. or higher and an Al content of 50 ppm or less that is a copolymer including a structural unit of a cyclic olefin monomer (A) derived from norbornene and a structural unit of a monomer (B) derived from at least one C4-C12 ?-olefin.

Abstract: Provided is a film, sheet, plate, or other such formed article having excellent transparency made of a copolymer obtained from a cyclic olefin monomer and an ?-olefin monomer. The present invention provides a formed article made from a copolymer having Tg of 170° C. or higher and an Al content of 50 ppm or less that is a copolymer including a structural unit of a cyclic olefin monomer (A) derived from norbornene and a structural unit of a monomer (B) derived from at least one C4-C12 ?-olefin.

Abstract: A polyester is a polycondensation product of (i) a diol component and (ii) a dicarboxylic acid component. In this polyester, the diol component (i) includes a tricyclo[3.3.1.13,7]decanediol of following Formula (1): wherein n is 0 or a positive integer, and carbon atoms constituting a ring may each have a substituent, or the dicarboxylic acid component (ii) includes a tricyclo[3.3.1.13,7]decanedicarboxylic acid of following Formula (2): wherein m is 0 or a positive integer, and carbon atoms constituting a ring may each have a substituent. The polyester has high heat resistance, low water absorbency, excellent optical characteristics and satisfactory moldability.

Abstract: A polyester is a polycondensation product of (i) a diol component and (ii) a dicarboxylic acid component. In this polyester, the diol component (i) includes a tricyclo[3.3.1.