Kronos International Inc. Patent applications |
Patent application number | Title | Published |
20140338566 | Method for Surface Treatment of Inorganic Pigment Particles - 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. | 11-20-2014 |
20140329670 | CONSTRUCTION MATERIAL MIXTURE, A METHOD FOR PRODUCING SAME, AND USE THEREOF - A construction material mixture used as a concrete additive contains a puzzolanic substrate and a photocatalyst. The puzzolanic substrate and the photocatalyst are available in the form of a dry mixture. The construction material mixture is a cement free dry mixture, wherein the photocatalyst has a primary particle size of between 2 nm and 100 nm. The puzzolanic substrate consists of at least 90 weight % of fly ash with a grain size of between 0.1 μm and 1 mm. The substrate and the photocatalyst are available completely mixed so that the photocatalyst is at least partially distributed on the surface of the substrate. | 11-06-2014 |
20140073729 | Infrared-Reflecting Pigment Based on Titanium Dioxide, and a Method for Its Manufacture - The invention relates to rutile titanium dioxide pigment particles that are capable of reflecting infrared radiation to a high degree and also display pigmenting properties, as well as a method for their manufacture. The particles have a mean particle size of 0.4 to 1.0 μm and are doped with zinc and potassium, but not with aluminium. Preferably, the particles have a compact particle form with a preferred height:width ratio of 1.5:1. The particles are preferably manufactured by the familiar sulphate process for manufacturing titanium dioxide, and are optionally subjected to inorganic and/or organic post-treatment following calcining. Preferably, the rutile titanium dioxide particles are suitable for manufacturing heat-insulating paints, coatings or plastics as well as for instance plasters or paving stones. | 03-13-2014 |
20140000484 | Composite Pigments Comprising Titanium Dioxide and Carbonate and Method for Producing | 01-02-2014 |
20140000483 | Method for the Surface Treatment of Inorganic Pigment Particles | 01-02-2014 |
20130074731 | Stable Nanoparticulate Suspension and Method for Production - The invention relates to a stable, highly concentrated, aqueous suspension of nanoparticles, particularly of titanium dioxide particles, a method for production, and use of the suspension, e.g. for coating or impregnation, or as an additive in organic or inorganic matrices. The suspension contains a first dispersant based on a polymeric alkoxylate and a second dispersant selected from the group of amino alcohols. The suspension is preferably characterized by the fact that its stability is preserved even during and after vigorous dispersion in an attrition mill and no increase in viscosity occurs. In a preferred embodiment, the viscosity declines by up to 10 to 50% as a function of the milling time. In a further embodiment, the suspension can be dried and subsequently redispersed, without the state of dispersion deteriorating. | 03-28-2013 |
20130058860 | Method for Manufacturing Titanium Dioxide - The manufacture of titanium dioxide by oxidation of titanium tetrachloride in a plug flow reactor, wherein the titanium tetrachloride is introduced into the reactor in at least two stages and is used exclusively in liquid form. The total quantity of liquid TiCl | 03-07-2013 |
20120270028 | Titanium dioxide photocatalyst containing carbon and method for its production - The invetion relates to a titanium dioxide-based photocatalyst containing carbon that is highly photoactive in visible light (vlp-TiO | 10-25-2012 |
20100282128 | Titanium dioxide pigment particles with doped, dense SiO2 skin 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 of states within the band gap of the pigment particles increases the photostability of the doped pigment. | 11-11-2010 |