Abstract: The invention relates to a method for manufacturing composite particles, particularly composite particles based on titanium dioxide and carbonate, with the help of combined mixing, homogenization and precipitation in a pipeline mixer based on the rotor-stator principle. The method is based on an aqueous suspension of a particulate base component (e.g. titanium dioxide), which is preferably produced in an intermediate vessel equipped with a high-speed agitator. At least one of the required precursor substances and/or a pH-controlling component for precipitating calcium carbonate, for example, is metered into the pipeline mixer, and the calcium carbonate is precipitated. The method can be operated as a continuous process or as a batch process and permits shorter production times. The composite particles produced display homogeneous dispersion of the precipitated particles and the particulate base component.

Abstract: A method for coating the surface of inorganic solid particles in an aqueous suspension, particularly for coating titanium dioxide with SiO2 includes: a) disagglomeration of the solid particles contained in aqueous suspension, b) addition of a water-soluble precursor of the coating substance to the suspension, c) immediately following step b) homogenization of the suspension, where the temperature and pH value of the suspension do not change significantly in steps a) to c), d) feeding the slurry into a tank and precipitation of the coating substance onto the particle surface and, optionally, application of further coatings, and e) separation of the solid particles from the suspension. The method produces to a highly homogeneous and continuous skin on the particle surface, and to less separately precipitated coating substance.

Abstract: The invention relates to a method for coating the surface of inorganic solid particles in an aqueous suspension. The untreated particles, particularly TiO2 base material, are made into an aqueous suspension and subsequently disagglomerated. According to the invention, a disagglomerated suspension of untreated particles is fed (recirculated) from an intermediate vessel (vessel) in a cyclic process. The intermediate vessel contains a high-speed agitator preferably having a minimum peripheral speed of 15 m/s or a specific agitator capacity P/V of at least 30 W/m3. A pipeline mixer (e.g. inline disperser) based on the rotor/stator principle is furthermore installed in the circuit. The water-soluble precursor compounds of the coating substances, and equally any necessary pH-controlling substances, are metered into the pipeline mixer.

Abstract: A colored composition comprising: a) NIR scattering TiO2 particulate material with an average crystal size of greater than 0.40 ?m and a particle size distribution such that 30% or more of the particles are less than 1 ?m; b) one or more non-white colorant; wherein the particulate material and the non-white colorant are dispersed within a vehicle. This material with a large crystal size has unusually high reflection of NIR radiation and, simultaneously, noticeably diminished reflectance of visible light. Also disclosed is a coated particulate TiO2 material, wherein the material has an average crystal size of greater than 0.40 ?m, and the coating comprises one or more oxide material; this provides low levels of photocatalytic activity that were previously unattainable. This coated TiO2 material may be provided in a composition.

Abstract: The present invention relates to a coating composition containing metal oxide particles with a high refractive index and low photocatalytic activity and a coating film obtained by applying the coating composition onto a substrate. The coating composition contains metal oxide particles with a high refractive index obtained by coating the specific fine particles of the titanium-based oxide on their surfaces with at least a silica-based oxide or a silica-based composite oxide, and the coating film is obtained by applying the coating composition onto a substrate. The metal oxide particles with not only a high refractive index but also low photocatalytic activity, and therefore a coating film with excellent weathering resistance and light resistance can be formed on a substrate.

Abstract: A glass filler manufacturing process and product which enable the manufacture of dental composite and dental cement products having superior product stability and also having superior physical properties. The process makes use of barium glass filler and strontium glass filler, which have high-radiopacity properties but could not previously be used for dental composites and dental cement. By simply coating the surface of the barium glass or strontium glass filler with an oxide having acid-resistance properties, and then following with a heat-treatment process, a suitable dental composite can be produced.

Abstract: A dispersion, comprising 0.1 to 25% by weight hydrophobized silica, 8 to 90 wt % of at least one alcohol selected from the group consisting of ethanol, 1-propanol and 2-propanol, 7 to 89 wt % of water, 0 to 30% by weight solvent immiscible with water, and 0.04 to 5 wt % of at least one carboxyvinyl polymer present in neutralized form, can be applied to a surface using a non-drip application method and, by modifying the surface with hydrophobized silica, imparts water-repelling and self-cleaning properties to the surface.

Abstract: The invention relates to a method for the surface treatment of inorganic pigment particles with agglomerates of fine primary particles or single crystals of inorganic compounds, particularly of oxides or sulphates. The method is characterized in that the inorganic compounds are first precipitated from an aqueous solution under suitable pH conditions in a separate vessel in the form of fluffily structured agglomerates and/or single crystals. The precipitation product is subsequently added to an aqueous suspension of inorganic pigment particles. The method is particularly suitable for the surface treatment of titanium dioxide particles, in order to achieve high hiding power or high opacity when used in emulsion paints or laminates.

Abstract: A composite comprising a silicate material, such as, a sodium aluminosilicate, and titanium dioxide disposed on the surface thereof is disclosed, together with formulations comprising the composite and methods for preparing the same.

Abstract: The present invention relates to a pigment paint for an exterior material and to a method for manufacturing the same. The pigment paint comprises: a flake matrix, a first metal oxide layer coated on the upper portion of the transparent matrix, an oxide layer containing MgO—SiO2 coated on the upper portion of the first metal oxide layer, and a second metal oxide layer coated on the upper portion of the oxide layer. In order to ensure humidity resistance and weather resistance required for a lustrous pigment paint for exterior materials, a cerium layer and an aluminum oxide layer are further coated. Properties such as high luminance, high chromaticity, and high gloss, which could not be achieved using conventional techniques, can be achieved and a pigment paint having a multi-colored pearl luster can be provided.

Abstract: An angle-dependent interference pigment based on transparent or translucent inorganic flake serving as a substrate is provided. The substrate is coated by coatings (A)+(B)+(C) and optionally coating (D), so as to form a “high-low-high” refractive index layered structure. The coatings (A) and (C) consist of metal oxides, silicate, aluminates and/or a mixture thereof. The coating (B) consist of silicon oxide, hydrous silicon oxide, aluminum oxide, hydrous aluminum oxide, magnesium oxide, hydrous magnesium oxide and/or a mixture thereof. The angle-dependent interference pigments have high color saturation in the transitional region and a significantly gradual color change in the color changing region. The present pigments can be used as colored coatings, including printing ink, or can be used in the preparation of plastics, glass, ceramics and the like. The pigment of the present invention is particularly used in the cosmetic industry which has a very high requirement on gradual color change.

Abstract: The invention relates to a high solids tint paste that is preferably substantially free of solvents that are volatile organic compounds. Preferably the universal tint paste is 100% solids and substantially free of any solvents. The universal tint paste is formed using a functional silicone resin intermediate that is end-capped with an alcohol, catalyzed to form a silicone resin product and combined with one or more desired pigments. The universal tint paste preferably can be used in a wide variety of solvent-borne and high solids coatings.

Abstract: The disclosure provides a polymer composition comprising a treated inorganic particle having improved photostability and improved anti-microbial properties, wherein the treated inorganic particle comprises: a inorganic core particle; a first treatment of a silicon compound, wherein the silicon compound is added in a single step; and a second treatment comprising a co-precipitated zinc oxide and alumina.

Abstract: The present invention relates to effect pigments based on uncoated or coated flake-form substrates having an outer coating comprising a) TiO2 and b) Al2O3, MgO and/or CaO and c) SiO2 and d) ZnO and/or e) at least one mixed oxide of the elements mentioned under a) to d), and to the use thereof, inter alia in paints, coatings, printing inks, plastics and cosmetic formulations.

Abstract: The present invention relates to a method for producing a compound that comprises a pseudolaminar silicate of natural origin, which is at least one clay of the paligorskite-sepiolite group, characterized in that said method comprises the following steps: defibrillating the microfibre bundles of the at least one clay in water; dispersing the defibrillated clay in an organic or inorganic liquid solvent until a stable gel is formed; adding to the dispersion at least one clay-surface-modifying agent; removing the solvent from the dispersion by means of a solid-liquid separation process and/or drying process; and deagglomerating the final compound until a powdered product is obtained. A further object of the present invention is the compound that can be obtained using said method, as well as the use of the compound as an additive or filler in composite polymeric materials in order to enhance the properties thereof, the composite polymeric material likewise being encompassed within the present invention.

Abstract: A composite comprising a silicate material, such as, a sodium aluminosilicate, and titanium dioxide disposed on the surface thereof is disclosed, together with formulations comprising the composite and methods for preparing the same.

Abstract: The present invention relates to a process for making a titanium dioxide pigment consisting of titanium dioxide and single layer of inorganic surface treatment consisting of aluminum phosphate wherein the pigment is characterized by and isoelectric point which is greater than pH 6 and a negative zeta potential of at a pH of 7.5 or more.

Abstract: Silica composite particles include silicon oxide and titanium in an amount of from 0.001% by weight to 10% by weight, wherein the silica composite particles have an average particle diameter of from 30 nm to 500 nm, a particle size distribution index of from 1.1 to 1.5, and an average degree of circularity of primary particles of from 0.5 to 0.85.

Abstract: A system of N?3 interference pigments, which is distinguished in that it exhibits a maximum color gamut through specification of the optimum pigment hue angle hu?v?i (i=1 to N) in the CIELUV system.

Abstract: A single step milling and surface coating process allows for production of a stable dispersion of surface coated nanoparticles in an efficient manner. The process comprises providing feed particles, providing a coating agent, and generating the stable dispersion of surface coated nanoparticles by milling the feed particles in an aqueous medium containing the coating agent such that the coating agent bonds to surfaces of the feed particles as the feed particles are milled to an average particle size of less than about 100 nm.

Abstract: The invention relates to a method for the surface modification of titanium dioxide pigment and to its use, particularly in coatings, for interior and exterior walls (emulsion paints) and in water-borne paint systems. The method for surface modification is based on a titanium dioxide pigment that has been provided with a fluffily structured surface coating and where the fluffily structure of the surface coating is at least partially compacted, preferably by exposing the pigment particles to high shear and impact forces. The pigment particles are preferably coated with silicon oxide and/or aluminium oxide. The method according to the invention preferably reduces the specific surface area (BET) by roughly 30%. The pigment according to the invention can be used to optimise the rheological properties and the open time of the paint.

Abstract: A fully calcined kaolin pigment extender is provided which has a product Mullite Index (M.I.) of 25.0 or higher. The calcined kaolin pigment extender can be advantageously used in paints to improve scrub and burnish resistance.

Abstract: The subject matter of the present invention is marked inorganic additives, a method for their production and also their use.

Abstract: Embodiments of the invention relate to methods for making and compositions including zeolite with an impregnated titanium dioxide. Such zeolite/titanium dioxide compositions may be useful, for example, as a substitute or extender for titanium dioxide used in coatings.

Abstract: Colored composite microparticles comprising silica and an organic pigment in which the silica is enclosed in the organic pigment and contained in an amount of 0.001 to 9% by weight (calculated as Si) based on the weight of the composite particles. These microparticles have a high tinting strength and are excellent in dispersibility and light fastness.

Abstract: The present invention relates to a coating material comprising (A) at least one binder as component (A) and (B) at least one photocatalytically active particle comprising a core composed of at least one first substance having a diameter of 0.1 to 1 ?m and at least one envelope at least partly surrounding the core and composed of at least one second substance having an average layer thickness of 0.1 to 10 nm as component (B).

Abstract: The present invention relates to pearlescent pigments based on glass flakes which are distinguished by the fact that they have the following layer structure: A) optionally a layer of SiO2, B) a high-refractive-index coating have a refractive-index n>1.8 which essentially consists of TiO2, C) a low-refractive-index layer comprising SiO2 and/or Al2O3 and optionally D) an outer protective layer, and to the use thereof in paints, coatings, automobile paints, powder coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, paper, in toners for electrophotographic printing processes, in seed, in greenhouse sheeting and tarpaulins, as absorbers in the laser marking of paper and plastics, as absorbers for the laser welding of plastics, in cosmetic formulations, for the preparation of pigment pastes with water, organic and/or aqueous solvents, for the preparation of pigment compositions and dry preparations.

Abstract: The invention relates to a pearlescent pigment comprising a metal oxide-containing, platelet-shaped substrate and having a first and a second protective layer, wherein the metal oxide has a refractive index greater than 1.

Abstract: A transparent titanium oxide in which the titanium oxide particles have been coated with a hydrated metal oxide having no photocatalytic activity in order to block photocatalytic activity. Hydrous titanium oxide sol particles are coated with a layer comprising a hydrated oxide of silicon. The coating layer can further contain a hydrated oxide of at least one metal selected among tin, aluminum, and zirconium and a hydrated oxide of antimony. Also provided are a process for producing a sol of surface-coated transparent titanium oxide and a coating composition containing a sol of surface-coated transparent titanium oxide.

Abstract: The present invention relates to novel pigment mixtures comprising at least two different particulate components A and B. The first component A comprises titanium suboxide(s), a titanium oxynitride or a titanium nitride species. Component B particle comprises inorganic, or organic pigments. The titanium suboxide particles display a bluish metallic luster, are new and form a further aspect of the present invention. When combined with particles from component B such as variously coated micas, for example, the bluish or bluish/black metallic color effect from component A leads to special color effects in the various mixtures.

Abstract: The present invention relates to a TiO2 pigment coated sequentially in a wet treatment process with hydrous silica and hydrous alumina both in the presence of citric acid wherein the resulting pigment is coated with from 1 to 4% amorphous alumina based on the weight of the untreated TiO2; from 3 to 6% silica glass based on the weight of the untreated TiO2.

Abstract: A synthetic aggregate with photocatalytic properties for road use, includes a collection of particles each including a matrix formed by a binder containing at least photocatalytic particles and a particulate mineral material. The method of producing the synthetic aggregate and its use in a pollution-reducing road surface course having excellent tyre grip are also described.

Abstract: The present invention relates to effect pigments based on thin glass flakes and to a method for the production of such pigments. The resulting pigment can be used in any application for which pearlescent pigments have been heretofore used such as, for example, in plastics, paints, inks, cosmetic formulations, coatings including solvent or waterborne automotive paint systems, powder coatings, inks and agriculture foils.

Abstract: An angle-dependent interference pigment based on transparent or translucent inorganic flake serving as a substrate is provided. The substrate is coated by coatings (A)+(B)+(C) and optionally coating (D), so as to form a “high-low-high” refractive index layered structure. The coatings (A) and (C) consist of metal oxides, silicate, aluminates and/or a mixture thereof. The coating (B) consist of silicon oxide, hydrous silicon oxide, aluminum oxide, hydrous aluminum oxide, magnesium oxide, hydrous magnesium oxide and/or a mixture thereof. The angle-dependent interference pigments have high color saturation in the transitional region and a significantly gradual color change in the color changing region. The present pigments can be used as colored coatings, including printing ink, or can be used in the preparation of plastics, glass, ceramics and the like. The pigment of the present invention is particularly used in the cosmetic industry which has a very high requirement on gradual color change.

Abstract: A multilayer effect pigment includes a transparent substrate, a layer of high refractive index material on the substrate, and alternating layers of low refractive index and high refractive index materials on the first layer, the total number of layers being an odd number of at least three, all adjacent layers differing in refractive index by at least about 0.2 and at least one of the layers having an optical thickness which is different from all of the other layers. The resulting multilayer effect pigment is not a quarter-wave stack. The present effect pigments may be used in cosmetic and industrial applications.

Abstract: A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.

Abstract: A coating material comprising a binding agent and at least one filler including particles having a size and/or surface roughness of about 100 ?m or less, and a photocatalytically active agent. The binding agent may be at least partially decomposed by a photocatalytic action, and a microstructured, self-cleaning surface may be formed.

Abstract: A method of preparing a pigment exhibiting a color-shifting effect, including at least heating mica powder suspension in water, adjusting the pH value of the mixture to between 2 and 9, adding a first inorganic salt solution, maintaining the pH value of the mixture constant, stirring the mixture at constant temperature, adjusting the pH value of the mixture to between 6 and 14, adding a second inorganic salt solution, maintaining the pH value of the mixture constant, stirring the mixture at constant temperature, adjusting the pH value of the mixture to between 2 and 9, adding a third inorganic salt solution, maintaining the pH value of the mixture constant, and stirring the mixture at constant temperature.

Abstract: Disclosed is a flaky material formed of an aggregate of fine particles. The aggregate is formed by uniting fine particles to one another. The fine particles are derived from fine particles of an inorganic oxide dispersed in a solvent having an effective (OH?) content of 3×10?5 to 1×10?6 mol/l. The surface of the flaky material has a flatness degree equal to or lower than 0.5 ?m. The flaky material can provide viewers with a high brightness feeling.

Abstract: The embodiment of kaolin quality improvement includes a chemical, heating method for processing kaolin to high brightness levels and lower viscosities. This permits addition of natural titania for greater opacity in commercial paper coating. Mechanism of brightness improvement includes removal of iron oxides and iron sequestered by natural organic acids. Viscosity is improved by removal of organic and at least partial decomposition of expandable clay, such as montmorillonite. Kaolin crude is dispersed preferably with Calgon at minimum level. Classification to desired particle size is followed by adding 0.2 percent sodium sulfate decahydrate. After raising pH to 8.5 with dilute sodium hydroxide the slip is heated to 65 to 70 degrees centigrade for 5 to 60 minutes. Cooled to at least 40 degrees centigrade, the slip is bleached with sodium hydrosulfite. Time of bleach is 20 minutes at pH 3 to 3.5. Efficient filtration and rinsing is critical, a 2:1 ratio of water to dry clay rinse preferable.

Abstract: A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.

Abstract: Pigments formed from glass flakes which have a wide variety of uses, for instance, in paints, in ink-jet printing, dyeing textiles, in coatings, printing inks, plastics, cosmetics, glazes for ceramics and glass. Also provided is a glass flake substrate for the pigments.

Abstract: The invention relates to a rutile titanium dioxide pigment for use in decorative laminating papers that yields higher opacity of the papers compared to the prior art, as well as a method for its manufacture. The pigment displays a surface coating that contains aluminum phosphate, aluminum oxide, silicon oxide and titanium oxide. The silicon oxide is precipitated in fluffy form. The coated particles display a BET value of at least 15 m2/g. The manufacturing method is characterized in that an aluminum and a phosphorus component are first added to a TiO2 suspension. Thereafter, an alkaline silicon component, an acid-reacting titanium component and, optionally, a further pH-regulating component are added, the pH value being set in the range from 4 to 9 in this context.

Abstract: The present invention provides a preparation method of composite silica microparticles with monodispersity, comprising the steps of: (a) adding at least one precursor selected from a titania precursor and an alumina precursor, and a silica precursor to a solvent, which are hydrolyzed to form composite silica microparticles; (b) drying and calcining the composite silica microparticles; and (c) hydrophobically treating the calcined composite silica microparticles.

Abstract: A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.

Abstract: A thermoplastic resin composition which comprises (A) 40 to 98 mass % thermoplastic resin and (B) 60 to 2 mass % titanium oxide particles whose surface has been coated with a hydrous oxide and/or oxide of at least one metal selected from the group consisting of aluminum, silicon, zirconium, tin, cerium, titanium, and zinc, wherein the titanium oxide particles contain 80 to 97 mass %, excluding 97 mass %, titanium oxide ingredient and have total content of alkali metal cations and alkaline earth metal cations extractable with pure water of 120 mass ppm or lower. The resin composition is excellent in reflectance and thermal stability in residence during molding into large products.

Abstract: The present invention relates to effect pigments based on thin glass flakes and to a method for the production of such pigments. The resulting pigment can be used in any application for which pearlescent pigments have been heretofore used such as, for example, in plastics, paints, inks, cosmetic formulations, coatings including solvent or waterborne automotive paint systems, powder coatings, inks and agriculture foils.

Abstract: The present invention relates to a process for preparing TiO2/SiO2 mixed oxides or the hydrates and/or oxide hydrates thereof comprised of 0.5 to 95 wt % SiO2 and the balance as TiO2, each referring to the completely calcined product, by using titanium alcoholates and aqueous silica sol. Moreover, the invention relates to the use of these mixed oxides as catalyst carriers.

Abstract: A method of predicting photostability of coatings with various dopants on titanium dioxide pigment particles is disclosed. Calculations of the density of states show that a doped coating which reduces the density of states near the band edge or increases the density of states within the band gap of the pigment particles increases the photostability of the doped pigment.

Abstract: A pearlescent pigment based on a metal oxide-coated, platelet-shaped substrate and a top layer on the metal oxide layer, where the top layer comprises silicon dioxide, at least one further metal hydroxide or metal oxide hydrate and at least one organic coupling reagent. The further metal hydroxides or metal oxide hydrates are hydroxides or oxide hydrates of cerium, aluminum or zirconium, or mixtures thereof. The coupling reagents employed are organofunctional silanes, zirconium aluminates or metal acid esters.