Abstract: A composition comprising pulverized hydrous kaolins having a particle size distribution meeting the following ratio: ( cumulative ? ? mass ? ? at ? ? 0.5 ? ? ?m ) ( cumulative ? ? mass ? ? at ? ? 2 ? ? ?m ) ? 0.5 , and a median particle size (D50) less than or equal to 2.0 ?m and a composition comprising hydrous kaolins having the particle size distribution, the median particle size (D50), and certain Hegman dispersion according to the “SSM” V-T Alkyd Hegman Test are disclosed. Also disclosed is a method of preparing a composition comprising inventive hydrous kaolins, as well as a method of increasing the dispersion rate of hydrous kaolins. Products, such as inks, paints, polymer products, rubber products, and coatings, using the inventive hydrous kaolins are also disclosed.

Abstract: Disclosed herein are organo-neutralized calcined kaolins comprising calcined kaolin treated with at least one basic organic compound, a composition comprising the organo-neutralized calcined, and use of the organo-neutralized calcined kaolin in silicone rubber formulations. Further disclosed herein are a method of making the organo-neutralized calcined kaolin and a method of making a silicone rubber formulation comprising the organo-neutralized calcined kaolin.

Abstract: Disclosed herein are dry aggregated calcium carbonates, comprising calcium carbonate and at least one inorganic binder, wherein the dry aggregated calcium carbonate has a median aggregate particle size (D50) of at least 5 microns. Also disclosed are compositions comprising such calcium carbonates. Products, such as paints, and methods of making products containing such aggregated calcium carbonate are further disclosed.

Abstract: The present invention relates to a composition comprising calcined kaolin having a narrow particle size distribution. The composition can have many uses, such as fillers or extenders in paint, plastics, polymers, papermaking, and coating compositions. More generally, the inventive products may be used wherever calcined kaolins are used.

Abstract: The present invention relates to coarse calcined kaolin slurries having a high solids content. The invention also relates to methods of making such slurries. The resulting slurries can have a solids content of at least about 58% by weight wherein at least about 40% by weight of the calcined kaolin particles has a particle size of at least about 1 ?m. The slurries can be stabilized where the solids show little settling from suspension. The slurries have many uses, including fillers or extenders in paint and coating compositions for paper or paper board. More generally, the inventive products may be used wherever calcined kaolins are used. The present invention also related to coarse calcined kaolin slurries having a multimodal particle size distribution and a high solids content.

Abstract: Disclosed herein are compositions comprising polymers and at least one lubricant comprising at least one silicone oil and at least one oxidized polyethylene. Also disclosed are filled polymer products comprising the compositions disclosed herein as well as mineral fillers, as well as methods of extruding such polymers and the products of the extrusion.

Abstract: Disclosed herein are compositions comprising novel delaminated kaolins having a large particle size and low levels of alkali metal oxides. Methods of making the disclosed delaminated kaolin by calcining hydrous kaolin are described. Applications using the disclosed compositions in preparing catalyst substrates, paints, coatings, sealants, cementitious products, ceramics, rubbers, polymers and other compositions are also described.

Abstract: The present invention relates to calcined kaolins having optimal whiteness and brightness properties. The calcined kaolins can comprise metakaolin, fully calcined kaolin, or flash calcined kaolin. The kaolin can be calcined from hydrous kaolin that has been subjected to enhanced magnetic separation. The resulting calcined kaolin can have a whiteness defined by a Hunter lab coordinate L value of at least about (96). The calcined kaolin can also have a brightness of at least about (90), as measured by a Technibrite TB-1C instrument. The present invention also relates to methods of preparing calcined kaolins. The present invention also relates to paints, polymers, coatings, ceramics, paper, and cementitious products comprising these calcined kaolins.

Abstract: Disclosed herein are organo-neutralized calcined kaolin comprising calcined kaolin treated with at least one basic organic compound, a composition' comprising the organo-neutralized calcined, and use of the organo-neutralized calcined kaolin in silicone rubber formulation. Further disclosed herein are a method of making the organo-neutralized calcined kaolin and a method of making a silicone rubber formulation comprising the organo-neutralized calcined kaolin.

Abstract: Disclosed herein are compositions comprising novel calcined kaolins having a large particle size and low levels of alkali and alkali earth metal oxides. Methods of making the disclosed calcined kaolin by calcining hydrous kaolin are described. Applications using the disclosed compositions in preparing catalyst substrates, paints, coatings, sealants, cementitious products, ceramics, rubbers, polymers and other compositions are also described.

Abstract: Disclosed herein are methods of determining the presence of contaminating dispersants, such as polymeric dispersants and inorganic dispersants, in a processed mineral, including mineral products such as pigments, by measuring the particle charge of the processed mineral using a particle charge detector.

Abstract: Disclosed herein are dry aggregated calcium carbonates, comprising calcium carbonate and at least one inorganic binder, wherein the dry aggregated calcium carbonate has a median aggregate particle size (D50) of at least 5 ?m. Also disclosed are compositions comprising such dry aggregated calcium carbonates. Products, such as paints, and methods of making products containing such aggregated calcium carbonate are further disclosed.

Abstract: A method of method of making a formed ceramic body, comprising casting or jiggering a composition comprising a mullite-rich calcined kaolin obtained from a hydrous kaolin. Also provided is a method of modifying/increasing the casting rate of a formed body formulation comprising hydrous kaolin, the method comprising substituting at least 10% of the hydrous kaolin in the formulation with a mullite-rich calcined kaolin. Also provided is a ceramic body filter cake comprising a mullite-rich calcined kaolin, wherein the mullite-rich calcined kaolin is obtained from a hydrous kaolin and a method of modifying/increasing the filtration rate of a ceramic body filter cake comprising hydrous kaolin, the method comprising substituting at least 10% of the hydrous kaolin in the ceramic body filter cake with a mullite-rich partially calcined kaolin.

Abstract: A method of method of making a formed ceramic body, comprising casting or jiggering a composition comprising a mullite-rich calcined kaolin obtained from a hydrous kaolin. Also provided is a method of modifying/increasing the casting rate of a formed body formulation comprising hydrous kaolin, the method comprising substituting at least 10% of the hydrous kaolin in the formulation with a mullite-rich calcined kaolin. Also provided is a ceramic body filter cake comprising a mullite-rich calcined kaolin, wherein the mullite-rich calcined kaolin is obtained from a hydrous kaolin and a method of modifying/increasing the filtration rate of a ceramic body filter cake comprising hydrous kaolin, the method comprising substituting at least 10% of the hydrous kaolin in the ceramic body filter cake with a mullite-rich partially calcined kaolin.

Abstract: The present invention relates to calcined kaolin products, their production, and use. More specifically, the invention relates to calcined kaolin-containing products having a median diameter particle size of from about 0.5 &mgr;m to about 10 &mgr;m, and a multimodal particle size distribution defined herein. The calcined kaolin products of the invention possess a combination of physical properties and applied properties not previously seen together in calcined kaolin pigments. The products according to the invention find use as flattening (or matting) agents, and as fillers or extenders in paint and coating compositions. More generally, the inventive products may be used wherever calcined kaolins are used.

Abstract: The present invention relates to calcined kaolin products, their production, and use. More specifically, the invention relates to calcined kaolin-containing products having a median diameter particle size of from about 0.5 &mgr;m to about 10 &mgr;m, and a multimodal particle size distribution defined herein. The calcined kaolin products of the invention possess a combination of physical properties and applied properties not previously seen together in calcined kaolin pigments. The products according to the invention find use as flattening (or matting) agents, and as fillers or extenders in paint and coating compositions. More generally, the inventive products may be used wherever calcined kaolins are used.

Abstract: The present invention provides compositions, and method for making same, comprising large particle size, calcined kaolin clays that, when used in paint formulations, provide paints having low sheen and good weathering resistance. Compositions of the invention include a composition comprising the pigment produced by a process comprising calcining a feed comprising kaolin having a median equivalent spherical diameter (e.s.d.) as measured on a Sedigraph 5100 of greater than about 2.0 microns and having .ltoreq. about 15% less than 0.5 micron.

Abstract: A thickening or suspending agent for imparting thixotropic properties to aqueous compositions, particularly LADD formulations, comprises a kaolinite clay admixed to the formulation at a level ranging from about 2% to about 5% by weight. While the thickening or suspending properties of the kaolinite clay are exhibited over a very broad range of particle size products, the kaolinite clay used advantageously has a particle size distribution of at least about 50% of the kaolin particles thereof have a particle size less than 2 microns equivalent spherical diameter, more preferably at least about 80% and, most perferably, at least about 95%. When utilized in a slurry form, the kaolinite clay based thickening or suspending agent most advantageously comprises an aqueous slurry of kaolinite particles at a solids level of at least 65% solids by weight.

Abstract: Polymerizable, liquid, substantially gel-free, partially polymerized monomer compositions having allylic utilizations greater than 50 percent can be prepared if the monomer which has been partially polymerized is bis(allylic carbonate) monomer of at least one 4,4'-(alkylidene)-bis[phenol], bis(allylic carbonate) monomer of at least one 4,4'-[phenylenebis(alkylidene)]bis [phenol], or a mixture thereof.

Abstract: The yellowness of polymerizates formed form polymerizable compositions containing bisphenol bis(allylic carbonate)-functional material is reduced by inclusion of one or more cyclohexenic compounds in the polymerizable compositions.