| Imerys Pigments, Inc. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110159290 | STEARIC ACID-TREATED CALCIUM CARBONATE COMPOSITIONS HAVING LOW OR NO DETECTABLE FREE STEARIC ACID AND RELATED METHODS - A method for treating calcium carbonate includes combining calcium carbonate with an amount of stearic acid and an amount of water to form a mixture, the amount of water being at least about 0.1% by weight relative to the total weight. The method further includes blending the mixture to form a stearic acid-treated calcium carbonate composition. | 06-30-2011 |
| 20110001078 | METHODS FOR PURIFYING KAOLIN CLAYS USING REVERSE FLOTATION, HIGH BRIGHTNESS KAOLIN PRODUCTS, AND USES THEREOF - Disclosed herein are methods for removing discoloring impurities, such as carbon impurities, particularly graphite, from kaolin clay to enhance the brightness of the kaolin clays. The methods include reverse flotation processes. Also disclosed herein are high brightness kaolin products, and the uses thereof. | 01-06-2011 |
| 20100184348 | Spunlaid Fibers Comprising Coated Calcium Carbonate, Processes For Their Production, and Nonwoven Products - Disclosed herein, in one embodiment, are spunlaid fibers comprising at least one polymeric resin and at least one filler having an average particle size of less than or equal to about 5 microns and/or having a top cut of less than about 15 microns, wherein the at least one filler is present in an amount of less than about 40% by weight, relative to the total weight of the spunlaid fibers. Also disclosed herein is a method for producing spunlaid fibers comprising adding calcium carbonate to at least one polymeric resin and extruding the resulting mixture. Further disclosed herein are nonwoven fabrics comprising such spunlaid fibers and methods for producing them. | 07-22-2010 |
| 20100107929 | GRANULATED KAOLIN COMPOSITIONS AND PROCESSES FOR THEIR PRODUCTION - Disclosed herein are granulated kaolin compositions exhibiting at least one of improved material handling properties, low dusting during transit, easy make-down into mineral-water slurries, and requiring less energy to produce than spray dried kaolin products. The granulated kaolin compositions may, in one embodiment, be characterized by a moisture content ranging from about 12% to about 23% by weight relative to the total weight of the composition. In another embodiment, the granulated kaolin compositions may have an average granule size of greater than about 10 mesh. Also disclosed herein are granulated kaolin compositions having a moisture content ranging from about 12% to about 23% by weight relative to the total weight of the composition, wherein the composition is friable when subjected to a shear force. Further disclosed herein is a method for producing granulated kaolin compositions comprising mixing at least one kaolin slurry with at least one predispersed spray dried kaolin and agglomerating the resulting mixture. Still further disclosed herein is a system for producing granulated kaolin compositions comprising a first zone for mixing at least one kaolin slurry with at least one predispersed spray dried kaolin and a second zone for agglomerating the resulting mixture. | 05-06-2010 |
| 20090317318 | Method of Treating an Aqueous Suspension of Kaolin - A method of treating a kaolin particulate material to improve one or more of its properties by removal of impurity particles therein which includes: producing a dispersed aqueous suspension of a kaolin particulate material containing at least 0.1% by weight, based on the dry weight of the kaolin particulate material of separable particulate impurity; diluting said dispersed aqueous suspension by adding a diluent thereto; adding a selective flocculation polymer to the diluted suspension; allowing the suspension containing the polymer to separate in a selective flocculation separator into layers comprising a flocculated product layer and a deflocculated impurity layer containing the separable impurity; and extracting the separated layers from the separator, wherein at least a portion of said deflocculated impurity layer is recirculated for use as at least a portion of the aforementioned diluent. | 12-24-2009 |
