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| Number | Title | Issue Date |
| 8105432 | Easy to disperse, high durability TiOpigment and method of making same 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... | 01/31/2012 |
| 8007583 | Multi-layer effect pigment 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 n... | 08/30/2011 |
| 7988780 | Titanium dioxide pigment particles with doped, dense SiOskin and methods for their manufacture 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... | 08/02/2011 |
| RE41858 | Pearlescent pigment for water-borne surface-coating systems 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 reag... | 10/26/2010 |
| 7763110 | Titanium dioxide pigment particles with doped, dense SiOskin and methods for their manufacture 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... | 07/27/2010 |
| 7416600 | Silicon-titanium mixed oxide powder produced by flame hydrolysis Silicon-titanium mixed oxide powder produced by flame hydrolysis, which consists of aggregates of primary particles, with a BET surface area of 90±15 m2/g, a titanium dioxide proportion of 50±8 wt. % and an anatase/rutile ratio of 60:40 to 70:30. | 08/26/2008 |
| 7371275 | Titanium dioxide pigment and polymer compositions Coated titanium dioxide pigment having high UV absorption properties and use in polymer compositions, especially PVC for building and residential construction is described. ... | 05/13/2008 |
| 7344590 | Silver pigments The present invention relates to silver pigments based on transparent, low-refractive-index, platelet-shaped substrates which have a high-refractive-index coating consisting of TiO2 having a layer thickness of 5-300 nm and optionally an outer protective l... | 03/18/2008 |
| 7306667 | Silicon-titanium mixed oxide powder A silicon-titanium mixed oxide powder contains aggregates of primary particles selected from amorphous silicon dioxide particles, crystalline titanium dioxide particles, and silicon-titanium mixed oxide particles each having an amorphous silicon dioxide fraction and... | 12/11/2007 |
| 7265176 | Composition comprising nanoparticle TiO2 and ethylene copolymer Disclosed is a composition comprising or produced from nanoparticle-sized TiO2, an ethylene copolymer or ionomer of the ethylene copolymer, and optionally a second polymer. Also disclosed are films and other shaped articles produced therefrom. The composi... | 09/04/2007 |
| 7255736 | Effect pigments based on thin SiO flakes Effect pigments having improved optical properties based on SiO2 flakes coated with one or more layers, where the SiO2 flakes have a thickness of from 50 nm to 150 nm; processes for the preparation thereof; and use of these pigments in cosmetic... | 08/14/2007 |
| 7255735 | Surface-modified silicon dioxide-titanium dioxide mixed oxides Pyrogenically prepared surface-modified silicon dioxide-titanium dioxide mixed oxides are prepared by spraying pyrogenically prepared silicon dioxide-titanium dioxide mixed oxides with a surface-modifying agent. The surface-modified pyrogenically prepared silicon di... | 08/14/2007 |
| 7250080 | Process for the manufacture of organosilicon compound-treated pigments An improved process for making an organosilicon compound surface-treated titanium dioxide material, comprising (a) forming a mixture of the titanium dioxide material in water, (b) wet milling the mixture, (c) adjusting the pH of the slurry resulting from step (b) to... | 07/31/2007 |
| 7244302 | Titanium dioxide coated with silicon dioxide A powder containing particles with a core of titanium dioxide and a coating of silicon dioxide in an amount of between 0.5 and 40 wt. %, the particles have a BET surface of between 5 and 300 m2/g, and the particles are primary particles that have a coatin... | 07/17/2007 |
| 7238231 | Process for manufacturing zirconia-treated titanium dioxide pigments An improved process is described for manufacturing zirconia-treated titanium dioxide pigments, wherein the zirconia treatment is accomplished in the process of fluidizing a titanium dioxide filter or press cake and then drying the same, through the addition to the f... | 07/03/2007 |
| 7217318 | Nacreous pigment and method for the manufacture thereof In a method for the manufacture of a nacreous pigment, in which a multi-layer film is produced by vacuum evaporation coating on a substrate and, after release from the substrate, the particles thus produced are comminuted to pigment particles of a desired size, vapo... | 05/15/2007 |
| 7214264 | Hyperplaty clays and their use in paper coating and filling, methods for making same, and paper products having improved brightness The present invention relates to a hydrous kaolin product having improved optical properties, for example, when used in the production of paper products. The present invention comprises an improved barrier coating for paper and a method of making the coated paper. T... | 05/08/2007 |
| 7179857 | Use of titanium dioxide as anti-UV agent in a rubber composition The invention concerns the use as anti-UV agent, in an elastomer rubber composition, of titanium dioxide particles of not more than 20 mn in size, said particles being coated with a silica, silico-aluminate or alumina layer. The invention also concerns rubber compos... | 02/20/2007 |
| 7169223 | Effect pigments having a strong color flop The present invention relates to effect pigments having a color flop comprising metal oxide-coated SiO2 flakes having a uniform layer thickness, where the color flop runs through all four quadrants of the a,b color coordinate system (CIELAB L,a,b system).... | 01/30/2007 |
| 7156913 | Intensely colored red effect pigments The present invention relates to intensely colored red effect pigments comprising iron oxide-coated SiO2 flakes, where the total thickness of the effect pigments is not greater than 500 nm (+/−30 nm). The present invention likewise relates to processes ... | 01/02/2007 |
| 7144628 | Spherical silica-titania-based fine particles surface-treated with silane, production process therefor, and external additive for electrostatically charged image developing toner using same Spherical silica-titania-based fine particles surface-treated with silane are provided. The fine particles have a titanium atom content of 0.001 to 5% by weight, a frictional electrification with iron powder of −100 to −300 μC/g, a bulk density of 0.2 to 0.4 g/... | 12/05/2006 |
| 7138010 | Amino phosphoryl treated titanium dioxide The invention is a pigment comprising titanium dioxide and an amino phosphoryl compound. The pigment of the invention imparts improved physical qualities, such as improved lacing resistance and dispersion, when incorporated into polymers. ... | 11/21/2006 |
| 7135065 | Method for the post-treatment of titanium dioxide pigments The invention relates to a method for the post-treatment of titanium dioxide, in order to produce particularly weather-resistant titanium dioxide pigments with good optical properties. The method is characterized in that, together with the hydrous oxides of tin and ... | 11/14/2006 |
| 7029648 | Process for making durable rutile titanium dioxide pigment by vapor phase deposition of surface treatment The present invention relates to a process for making durable titanium dioxide pigment by vapor phase deposition of surface treatments on the titanium dioxide particle surface by reacting titanium tetrachloride vapor, an oxygen containing gas and aluminum chloride i... | 04/18/2006 |
| 6991678 | Process for preparing microporous crystalline titanium silicate A process for the preparation of crystalline microporous titanium silicates using ethylsilicate-40 and titanium peroxide as silicon and titanium sources respectively is described. The process permits a significant decrease in the production cost of titanium silicate... | 01/31/2006 |
| 6947111 | Multilayer non-metallic reflecting flakes for cosmetics and sunscreens A material for protection against injurious ambient light composed of a binder mixed with non metallic reflective flakes is disclosed. ... | 09/20/2005 |
| 6929690 | Pigment with a metallic luster A pigment with a metallic luster, comprising a wafer-like substrate made of aluminium dioxide having a thickness of more than 250 nm and less than 1 μm, which is fully enveloped by a metal layer. ... | 08/16/2005 |
| 6884289 | Colored pigments The present invention relates to colored pigments based on multicoated platelet-shaped substrates which are distinguished by the fact that they comprise (A) a coating having a refractive index of n>1.8 and a layer thickness of 20-5... | 04/26/2005 |
| 6875264 | Multi-layer effect pigment 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 n... | 04/05/2005 |
| 6866711 | Composite pigment composition containing silica A composite pigment is provided with the composite pigment including a dense inorganic material and silica. The pigment composition is characterized by a CTAB surface area of greater than about 20 m2/g; a BET surface area of greater than about 15 m2 | 03/15/2005 |
| 6849112 | Inorganic particles as a dental material and a method of producing the same Amorphous inorganic particles as a dental material includes silica and inorganic oxide(s) other than silica and has high x-ray impermeability. The inorganic particles as a dental material includes silica with the content in the range from 70 to 98 weight % and oxide... | 02/01/2005 |
| 6840993 | Silver-colored luster pigment The present invention relates to silver-colored luster pigments based on multiply coated platelet-shaped substrates, which has at least one layer sequence of TiO2, a colorless coating and another TiO2 layer. The pigment can optionally have an o... | 01/11/2005 |
| 6818051 | Pigments The invention relates to particles with an opalescent effect, which have a particle size in the range from 5 μm to 5000 μm, comprising monodisperse spheres having a diameter of 50 nm to 2 μm with a standard deviation of less than 5% in a packed and regularly orde... | 11/16/2004 |
| 6805739 | Component and manufacture of a photo-catalyst A method of manufacturing a photo-catalyst including titanium dioxide and silicon dioxide is provided, wherein titanium dioxide is synthesized by a collosol gelatinization utilizing the water generated by the esterification of acid and alcohol to conduct a reaction ... | 10/19/2004 |
| 6774147 | Particles, aqueous dispersion and film of titanium oxide, and preparation thereof An aqueous titanium oxide-dispersed sol comprising titanium oxide particles dispersed in water, said sol comprising chloride ions in an amount of 50 to 10,000 ppm by weight as the chlorine element. Titanium tetrachloride is hydrolyzed to form an aqueous titanium oxi... | 08/10/2004 |
| 6773499 | Pigment mixture The present invention relates to pigment mixtures consisting of at least two components, component A being SiO2 flakes coated with one or more metal oxides and/or metals and component B being special-effect pigments, and to their use in varnishes, paints,... | 08/10/2004 |
| 6770130 | Silica composite oxide particles and method of producing the same Silica composite oxide particles comprising silica and a metal oxide other than silica, the content of the metal oxide other than silica being from 30 to 50 mol %, and a coefficient of variation in the particle diameter being not larger than 30%. The silica composit... | 08/03/2004 |
| 6695906 | Continuous processes for producing titanium dioxide pigments Titanium dioxide pigments having improved gloss and durability are disclosed. These pigments are prepared by continuous processes, where pH, temperature, and addition times of hydrous silica and alumina coatings are carefully controlled.... | 02/24/2004 |
| 6656259 | Multilayered interference pigments The invention relates to multilayered interference pigments which comprise a platelet-shaped substrate of silicon dioxide which is coated alternately with layers of light-transparent materials having refractive indices of n>1.8 and layers of light-transpa... | 12/02/2003 |
| 6632275 | Pigment mixture The present invention relates to pigment mixtures consisting of at least two components, component A being Sio2 flakes coated with one or more metal oxides and/or metals and component B being special-effect pigments, and to their use in varnish... | 10/14/2003 |
