The invention relates to a method for producing hydrophilic silicia moulded bodies, in which i) a mixture containing hydrophilic silicic acid is added at a maximum temperature of 55° C. to hydrophobic means and ii) the mixture obtained in step i) is compacted after a maximum storage time of 30 days to form moulded bodies, iii) during steps ii and iii and until the moulded bodies are used, the temperature is at a maximum of 55° C.

A method for producing a silica composite particle including a silica particle and at least one compound in which an aluminum atom bonds to an organic group through oxygen. The method includes: (i) providing a silica particle dispersion liquid having a silica particle content of about 20 mass % or more; (ii) mixing and reacting a compound represented by formula (S1) and the silica particle dispersion liquid to obtain a slurry; (iii) providing the at least one compound; and (iv) then mixing and reacting the slurry with the at least one compound to form the silica composite particle.

An organic substance-attached porous inorganic oxide particle including porous inorganic oxide particle and an organic substance attached to the surface of the porous inorganic oxide particle. The organic substance-attached porous inorganic oxide particle satisfies a formula below
(Cf−Ce)/2>1
where Cf represents the amount of carbon (atom %) measured by subjecting the surface of the particle to X-ray photoelectron spectroscopy (XPS) after the particle is washed, and Ce represents the amount of carbon (atom %) measured by subjecting the surface of the particle to X-ray photoelectron spectroscopy (XPS) after two-minute surface etching of the particle.

The present invention relates to hollow silica particles, which each includes a shell layer containing silica and a space inside the shell layer, in which the hollow silica particles have a peak intensity derived from SiOH at a wavenumber of around 3,746 cm.sup.−1 of 0.60 or less by infrared spectroscopy, a relative permittivity at 1 GHz of from 1.3 to 5.0 and a dielectric loss tangent at 1 GHz of from 0.0001 to 0.05.

The present disclosure relates to a combined treatment method for surface modification of fumed silica, which comprises the following steps: (1) two sets of modification devices are used to jointly treat fumed silica; the fumed silica is modified with a modifier in the reaction furnace of each set of modification devices to obtain two groups of modified fumed silica and exhaust gas respectively; (2) the exhaust gas obtained in step (1) is separated respectively to obtain unreacted modifier and by-products, and the obtained by-products are input into the reaction furnace of the other set of modification devices as reaction assistants to participate in the modification reaction; and the obtained unreacted modifiers are returned to the reaction furnace of the original modification device for repeated use.

Provided herein are surface treated pigments and methods of making and using the surface treated pigments. The surface treated pigments can comprise a mineral pigment surface treated with a hydrophilic latex composition and a hydrophobic material, which produce a film on an outer surface of the pigment. The hydrophobic material can be selected from a silane, a siloxane, or a siloxane/silicone resin blend, wax, fatty acid, styrene-butadiene latex, or a mixture thereof. The hydrophilic latex composition can be selected from a straight (meth)acrylic latex emulsion, a styrene-(meth)acrylic latex emulsion, or a blend thereof. The surface treated pigment has a surface energy that is less than a surface energy of the mineral pigment alone, a water contact angle of at least 90° and a dodecane contact angle of less than 150°.

A cristobalite includes: a d50 particle size selected within a range of from 1 μm to 15 μm; an L color coordinate of greater than 96; a color coordinate of less than 1; and a b color coordinate of 1 or less, in which the cristobalite is a powder. Also provided are compositions containing the cristobalite, coatings formed with compositions, and methods of preparing cristobalite.

The present invention is a composition comprising an aqueous dispersion of metal oxide pigment particles coated with an organosilane polymer comprising structural units of an alkyltrihydroxysilane or a salt thereof, a dialkyldihydroxysilane or a salt thereof, and an ancillary alkylsilane triol. The composition of the present invention provides hydrophobicity to pigment particles, thereby imparting water resistance, and allows for high loadings of pigment in water without increased viscosity. The dispersion is further useful for providing stain and corrosion resistance in coatings arising from paints.

A method of forming nanoparticles having superhydrophobicity includes preparing a PDMS film including a structure having a predetermined shape on a surface thereof, and generating the nanoparticles having superhydrophobicity on the surface of the PDMS film by combusting the surface of the PDMS film using a diffusion flame. Transparent nanoparticles having superhydrophobicity and oleophobicity may be generated simply and easily on the surface of the PDMS film.

Surface treated silica containing particles are combined with a resin to form a liquid prepolymer composition for use in additive manufacturing. A surface treatment on the silica containing particles may participate in polymerization of the composition. The silica containing particles may be colloidal silica or a silica polymer composite particle.