A dispersion liquid according to the present invention is a dispersion liquid containing metal oxide particles which have been surface-modified with a silane compound and a silicone compound, in which, when the dispersion liquid is dried by vacuum drying to separate the metal oxide particles, and a transmission spectrum of the separated metal oxide particles is measured in a wavenumber range from 800 cm.sup.−1 to 3800 cm.sup.−1 with a Fourier transform infrared spectrophotometer, Formula (1) below: IA/IB≤3.5 is satisfied (in the formula, “IA” represents a spectrum value at 3500 cm.sup.−1 and “IB” represents a spectrum value at 1100 cm.sup.−1).

A versatile silicone resin reflective substrate which exhibits high reflectance of high luminance light from an LED light source over a wide wavelength from short wavelengths of approximately 340-500 nm, which include wavelengths from 380-400 nm near lower limit of the visible region, to longer wavelength in the infra-red region. The silicone resin reflective substrate has a reflective layer which contains a white inorganic filler powder dispersed in a three-dimensional cross linked silicone resin, the inorganic filler powder having a high reflective index than the silicone resin. The reflective layer is formed on a support body as a film, a solid, or a sheet. The silicone resin reflective substrate can be easily formed as a wiring substrate, a packaging case or the like, and can be manufactured at low cost and a high rate of production.

A reactive silicone composition including component (S) and component (T) below, the component (S): a reactive silicone compound including a condensation product of a diaryl silicate compound represented by Formula [1] and a silicon compound represented by Formula [2],

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(wherein Ar.sup.1 and Ar.sup.2 each independently represent a phenyl group optionally substituted by a C.sub.1-6 alkyl group and X represents a hydrolyzable reactive group), the component (T): modified titanium oxide-containing oxide colloidal particles produced by bonding an organosilicon compound to surfaces of titanium oxide-containing oxide colloidal particles (C) having an average particle diameter of from 2 to 100 nm and including, as a core, titanium oxide-containing metal oxide colloidal particles (A), surfaces of which are coated with a coating including silicon dioxide- and tin oxide-containing composite oxide colloidal particles (B).

Provided are a nanocomposite body, a method of manufacturing the nanocomposite body, and a nanocomposite film including the nanocomposite body. The nanocomposite body includes: inorganic particles; a polymer matrix; and grafting polymer chains each of which includes a polyol structure, wherein the inorganic particles and the polymer matrix are linked by the grafting polymer chains.

A particulate TiO.sub.2 includes a TiO.sub.2 content of at least 99 wt.-%, an anatase content of at least 98 wt.-%, a primary crystallite size X.sub.50 of at least 200 nm, a numerical fraction of TiO.sub.2 with a primary crystallite size of at most 100 nm of at most 10%, a specific surface area of at most 8 m.sup.2/g as determined by BET measurements, 1200 ppm to 2400 ppm of alkali with respect to the TiO.sub.2 content, an Al content of 1 ppm to 1000 ppm, expressed as Al and with respect to the TiO.sub.2 content, a weight ratio of Al.sub.2O.sub.3 to Nb.sub.2O.sub.5 of from 0.17 to 0.74, and 0.1 wt.-% to 0.3 wt.-% of P, expressed as phosphorus and with respect to the TiO.sub.2 content.

Provided is a filler that has a low viscosity when mixed in a resin material and has reduced permittivity and dielectric loss tangent. The filler includes: a metal oxide particle material; and a polyorganosiloxane compound with which a surface treatment is performed on the metal oxide particle material and which is represented by general formula (1): (RO).sub.3Si—(SiR.sub.2—O—).sub.n—SiR.sub.3 (in general formula (1), each R is independently selected from among alkyl groups having 1 to 4 carbon atoms, and n is not less than 10 and not greater than 200). A resin composition obtained by containing the filler in a resin is suitable for an electronic material.

A dispersion liquid contains an inorganic oxide particle surface-treated with at least one of a compound represented by Formula Si(R.sup.A1)(X.sup.A1).sub.3 or a compound represented by Formula Si(R.sup.A2)(R.sup.A20)(X.sup.A2).sup.2, polysiloxane having at least one of a T unit represented by Formula [R.sup.B1SiO.sub.3/2] or a D unit represented by Formula [R.sup.B2R.sup.B20SiO], and an organic solvent, where a content of the polysiloxane is 0.5% to 39% by mass with respect to a total amount of the inorganic oxide particle and the polysiloxane, in which in the formula, R.sup.A1, R.sup.A2, R.sup.B1, and R.sup.B2 represent a functional group, X.sup.A1 and X.sup.A2 represent a hydroxyl group or a hydrolyzable group, and R.sup.A20 and R.sup.B20 represent an alkyl group or an aryl group.

A process is provided for the preparation of lacing resistant, titanium dioxide particles for use in photodurable thin film production. Said process involves dewatering titanium dioxide particles that have been encapsulated with a layer of amorphous alumina in continuous fashion at temperatures in excess of 100° C.

In producing titanium oxide containing rutile-type crystals by adding hydrochloric acid to an aqueous dispersion of an alkali metal titanate, sulfurous acid, disulfurous acid, sulfuric acid or a salt thereof is added. Thus, there is provided a titanium oxide powder which is doped with bivalent sulfur atoms (S.sup.2−) and in which a ratio (I.sub.A/I.sub.R) of a peak intensity (I.sub.A) of anatase-type crystals to a peak intensity (I.sub.R) of rutile-type crystals as measured by X-ray diffractometry is 0.1 or less. Moreover, a cosmetic is provided by dispersing the titanium oxide powder in a dispersion medium. Thus, bluish color derived from Rayleigh scattering is negated, providing a dispersion, particularly a cosmetic, with excellent transparency and color tone.

In an ultraviolet-shielding particle coated with silicon oxide of the present invention, a surface of the ultraviolet-shielding particle is coated with a silicon oxide coat, at least one functional group selected from the group consisting of an alkyl group, an alkenyl group, and a cycloalkyl group is present on a surface of the silicon oxide coat, and a content of the functional group is 0.0001% by mass or more and 0.30% by mass or less.