The invention relates to a process of making an anti-reflective coating composition comprising the steps of 1) preparing an oil-in-water emulsion by mixing an apolar organic compound A; a cationic addition copolymer C as emulsion stabilizer; and aqueous medium of pH 2-6; at a mass ratio C/A of 0.1 to 2, to result in 1-50 mass % (based on emulsion) of emulsified droplets of average particle size 30-300 nm; and 2) providing an inorganic oxide shell layer to the emulsified droplets by adding to the emulsion obtained in step 1) at least one inorganic oxide precursor, to result in organic-inorganic core-shell nano-particles with mass ratio core/shell of from 0.2 to 25. An advantage of this process is that the dispersion of nano-particles obtained is stable under different conditions, and allows altering its concentration and solvent system, and addition of different binders and auxiliary components. The invention also relates to a coating composition as obtained with said process, and to a process of applying a porous anti-reflective coating on a substrate using such composition, and to the resulting coated substrate.

An article includes a substrate including two main faces defining two main surfaces separated by edges, the substrate bearing a functional coating deposited by magnetron sputtering deposited on at least one portion of one main surface, and a temporary protective layer deposited on at least one portion of the functional coating, wherein, the temporary protective layer is deposited directly in contact with the functional coating, the temporary protective layer has a thickness of at least 1 micrometer, the temporary protective layer is not soluble in water, and the temporary protective layer is obtained from a composition comprising (meth)acrylate compounds, the substrate bearing the functional coating has not undergone a heat treatment at a temperature above 400° C.

This disclosure relates to an antireflection film, as well as its use on a substrate (3) to decrease a fracture of light striking the substrate (3) reflected by said substrate (3), wherein said coating is formed of a transparent first layer (1) applied on the substrate (3) and a transparent second layer (2) on said first layer (1). The essence of the solutions according to this disclosure is that thickness (d.sub.1) of the first layer (1) ranges from 10 to 70 nm and refractive index (n.sub.1) of said first layer (1) satisfies the relation 1.05<n.sub.1<1.35 within the wavelength range of 375 to 1000 nm, and wherein thickness (d.sub.2) of the second layer (2) ranges from 30 to 100 nm and refractive index (n.sub.2) of said second layer (2) satisfies the relation 1.25<n.sub.2<1.5 within the wavelength range of 375 to 1000 nm, and wherein n.sub.1<n.sub.2 also holds.

An inorganic oxide particles which have a minute particle diameter at which no interference fringes occur in a coating film and high transparency can be secured even when applied to a high refractive index substrate, and in which excitation by ultraviolet radiation is almost completely suppressed, a coating composition containing such particles, and an optical member having a cured film formed from the coating composition. Inorganic oxide particles obtained by bonding an organosilicon compound having a nitrogen-containing heterocyclic group to the surface of modified metal oxide colloid particles (C) having an average particle diameter of 2 to 100 nm, which include metal oxide colloid particles (A) having an average primary particle diameter of 2 to 60 nm as nuclei and with the nuclei surface coated with a coating composed of inorganic oxide colloid particles (B) having an average primary particle diameter of 1 to 4 nm.

An antiglare glass substrate includes a glass substrate having a first main surface and a second main surface that is opposite to the first main surface. The first main surface has undergone an antiglare treatment and a fluorine-containing organosilicon compound coating film as an antifouling film is laminated thereon. The first main surface partly includes a non-antiglare-treated portion that has not undergone the antiglare treatment. The non-antiglare-treated portion has a surface roughness Ra of less than 10 nm. A difference in height along a plate thickness direction of the glass substrate between the antiglare-treated portion that has undergone the antiglare treatment and the non-antiglare-treated portion is 10

A low-reflection film-coated transparent substrate of the present invention includes a transparent substrate and a low-reflection film formed on at least one principal surface of the transparent substrate. The low-reflection film is a porous film including: fine silica particles being solid and spherical and having an average particle diameter of 80 to 150 nm; and a binder containing silica as a main component, the fine silica particles being bound by the binder. The binder further contains an aluminum compound. The low-reflection film contains as components: 55 to 70 mass % of the fine silica particles; 25 to 40 mass % of the silica of the binder; 0.1 to 1.5 mass % of the aluminum compound in terms of Al.sub.2O.sub.3; and 0.25 to 3% of an organic component. The low-reflection film has a thickness of 80 to 800 nm. A transmittance gain is 2.5% or more, the transmittance gain being defined as an increase of average transmittance of the low-reflection film-coated transparent substrate in a wavelength range of 380 to 850 nm relative to average transmittance of the transparent substrate uncoated with the low-reflection film in the wavelength range. The organic component includes at least one selected from the group consisting of a β-ketoester and a β-diketone.

Disclosed herein is an anti-reflective film including: a hard coating layer; and a low-refractive layer containing a binder resin, and hollow inorganic nanoparticles and solid inorganic nanoparticles which are dispersed in the binder resin, wherein the low-refractive layer includes a first layer containing at least 70 vol % of the entire solid inorganic nanoparticles and a second layer containing at least 70 vol % of the entire hollow inorganic nanoparticles, and at the time of fitting polarization ellipticity measured by ellipsometry for the first layer or/and the second layer included in the low-refractive layer using a Cauchy model represented by the following General Equation 1, the second layer satisfies a predetermined condition.

Methods are provided for forming a particular multi-layer micron-sized particle that is substantially transparent, yet that exhibits selectable coloration based on its physical properties. The disclosed physical properties of the particle are controllably selectable refractive indices to provide an opaque-appearing energy transmissive material when pluralities of the particles are suspended in a substantially transparent matrix material. Multiply-layered (up to 30+ constituent layers) particles result in an overall particle diameter of less than 5 microns. The material suspensions render the particles deliverable as aspirated or aerosol compositions onto substrates to form layers that selectively scatter specific wavelengths of electromagnetic energy while allowing remaining wavelengths of the incident energy to pass. The disclosed particles and material compositions uniquely implement optical light scattering techniques in energy (or light) transmissive layers that appear selectively opaque, while allowing 80+% of the energy impinging on the light incident side to pass through the layers.

There is provided an optical member including a porous layer on a substrate, wherein the porous layer contains silicon oxide particles, a silicon oxide binder, and a fluorine compound having a fluorocarbon group and a nonionic hydrophilic group, and the amount of the fluorine compound is 0.1% by mass or more and 2.5% by mass or less with respect to the silicon oxide.

An optical member 10 includes an antireflection coating 12 on a substrate 11. The antireflection coating 12 includes a resin layer 4 and a modified cross-section fiber 1 bound to the resin layer 4. The modified cross-section fiber includes a core and a plurality of protrusions 3 extending from the core. The protrusions 3 of the modified cross-section fiber 1 have extremities protruding from a surface of the resin layer 4.