The invention relates to the manufacture of composite pigments containing aluminum hydroxide, and their use for improving the pigment light-scattering efficiency in coatings, plastics, paper and laminates. The composite pigment particles contain pigment particles such as titanium dioxide and precipitated aluminum hydroxide and are manufactured by in-situ precipitation of aluminum hydroxide in an aqueous pigment particle suspension. Use of the composite pigment particles according to the invention, based on titanium dioxide, permits savings on pigment with little or no loss of optical properties. Alternatively, if the pigment content remains unchanged, it is also possible to achieve better optical properties.

Aqueous coating compositions providing enhanced anticorrosive and water-resistant properties. The anticorrosive coating comprises water borne resin, surface-hydrophobic inorganic pigments, and/or surface-hydrophobic inorganic extenders.

A first object of the present invention is to provide a surface-modified inorganic nitride having excellent dispersibility. Furthermore, a second object of the present invention is to provide a composition, a thermally conductive material, and a device with a thermally conductive layer which contain the surface-modified inorganic nitride.

The surface-modified inorganic nitride of the present invention includes an inorganic nitride, and a compound which is represented by General Formula (I) and is adsorbed onto a surface of the inorganic nitride.

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In General Formula (1), n represents an integer of 3 or greater. X represents an aromatic hydrocarbon ring group or an aromatic heterocyclic group. Y represents a single bond, O, CO, COO, OCO, S, CS, NR.sup.A, NN, or a divalent unsaturated hydrocarbon group. R.sup.A represents a hydrogen atom or an alkyl group. R.sup.1 and R.sup.2 each independently represent a substituent. Here, at least one of R.sup.1 or R.sup.2 represents a monovalent organic group containing a specific functional group selected from the group A of specific functional groups.

In General Formula (1), a plurality of X's may be the same as or different from each other. Moreover, a plurality of Y's may be the same as or different from each other.

A first object of the present invention is to provide a surface-modified inorganic nitride having excellent dispersibility. Furthermore, a second object of the present invention is to provide a composition, a thermally conductive material, and a device with a thermally conductive layer which contain the surface-modified inorganic nitride.

The surface-modified inorganic nitride of the present invention includes an inorganic nitride, and a specific compound adsorbed onto a surface of the inorganic nitride, and

the specific compound has a functional group selected from the group consisting of a boronic acid group, an aldehyde group, an isocyanate group, an isothiocyanate group, a cyanate group, an acyl azide group, a succinimide group, a sulfonyl chloride group, a carboxylic acid chloride group, an onium group, a carbonate group, an aryl halide group, a carbodiimide group, an acid anhydride group, a carboxylic acid group, a phosphonic acid group, a phosphinic acid group, a phosphoric acid group, a phosphoric acid ester group, a sulfonic acid group, a halogenated alkyl group, a nitrile group, a nitro group, an ester group, a carbonyl group, an imidoester group, an alkoxysilyl group, an acrylic group, a methacrylic group, an oxetanyl group, a vinyl group, an alkynyl group, a maleimide group, a thiol group, a hydroxyl group, a halogen atom, and an amino group, and has a fused-ring structure containing two or more rings selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocyclic ring.

Disclosed are compositions of fillers coated with adhesion promoting material alone, or also coated with an additive, processes for producing the coated fillers, the fillers obtained from those processes, and methods of using the coated fillers. The filler particle(s) are surface-treated with a component which assists in the adhesion/adherence of an additive to the filler particles, resulting in the desired additive-coated fillers. The filler, adhesion promoting material and additive can be mixed in slurry and dried, and the resulting filler particles are directly useful in many applications, such as paper coatings, plastic compositions (both foamed and non-foamed), inks, paints, cosmetics, textiles and the like, wherever such fillers now find application. Preferably, the additive is a colorant.

An alumina powder containing a hydroxycarboxylic acid and an alkaline component contains amorphous alumina, pseudoboehmite, or boehmite, and satisfies all of (1) to (4). (1) A colloidal dispersion A with 2.5% by mass of Al.sub.2O.sub.3 consisting of the alumina powder and distilled water is free from precipitate, and has a light transmittance of at least 80% measured at a wavelength of 500 nm and an optical path length of 10 mm. (2) A colloidal dispersion B with 15% by mass of Al.sub.2O.sub.3 consisting of the alumina powder and distilled water is free from precipitate. (3) The dispersions A and B have a pH in a range of 5 to 8. (4) A colloidal dispersion C with 2.5% by mass of Al.sub.2O.sub.3 consisting of the alumina powder and methanol is free from precipitate, and has a light transmittance of at least 80% measured under the above condition.

The present disclosure relates to an organic-inorganic composite for rubber reinforcement, a method for preparing the same, and a rubber composition for tires including the same. The organic-inorganic composite for rubber reinforcement according to the present disclosure exhibits excellent dispersibility in the rubber composition and reinforcing effect, and thus can be suitably used for eco-friendly tires requiring high efficiency and high fuel efficiency characteristics.

Disclosed are compositions of fillers coated with adhesion promoting material alone, or also coated with an additive, processes for producing the coated fillers, the fillers obtained from those processes, and methods of using the coated fillers. The filler particle(s) are surface-treated with a component which assists in the adhesion/adherance of an additive to the filler particles, resulting in the desired additive-coated fillers. The filler, adhesion promoting material and additive can be mixed in slurry and dried, and the resulting filler particles are directly useful in many applications, such as paper coatings, plastic compositions (both foamed and non-foamed), inks, paints, cosmetics, textiles and the like, wherever such fillers now find application. Preferably, the additive is a colorant.

The present invention relates to novel composite particles based on mineral UV-screening agent and perlite. The present invention also relates to a composition comprising, in a cosmetically acceptable medium, at least composite particles for screening out UV radiation, based on mineral UV-screening agent and perlite. The invention also relates to a cosmetic process for caring for and/or making up human keratin materials, especially bodily or facial skin or the hair, comprising at least the application, to the surface of the keratin material, of at least one composition as defined previously. The invention also relates to a non-therapeutic cosmetic process for limiting the darkening of the skin and/or improving the colour and/or uniformity of the complexion, comprising the application, to the surface of the keratin material, of at least one composition as defined previously. The invention also relates to a non-therapeutic cosmetic process for preventing and/or treating the signs of ageing of a keratin material, comprising the application, to the surface of the keratin material, of at least one composition as defined previously.

A composition comprising a pigment particle that is coated with a cationic material and isopropyl titanium triisostearate. The pigment particle can be included in a cleansing composition for deposition on a surface, such as skin.