Abstract: An inorganic particulate suspension may include a first kaolin having a shape factor of at least about 70, and a second kaolin having a shape factor less than or equal to about 20. The first kaolin and the second kaolin form a kaolin composition, which may have a content ratio of the first kaolin to the second kaolin ranging from about 90:10 to about 50:50. An inorganic particulate suspension may include a kaolin composition having a shape factor ranging from about 55 to about 75, wherein at least about 70% to about 90% by weight of the particles of the kaolin composition have an equivalent spherical diameter less than 2 microns. The suspension may have a Hercules viscosity ranging from about 600 rpm to about 700 rpm at 18.0 dyne using an “A” bob, and the suspension may have a solids content ranging from about 55% to about 75% solids.

Abstract: A basecoat including a pigment blend including a calcined clay component and a hyper-platy clay component, wherein the hyper-platy clay component has a shape factor of at least about 40:1, and wherein the pigment blend has a sediment void volume of at least about 50 percent.

Abstract: A basecoat including a pigment blend including a calcined clay component and a hyper-platy clay component, wherein the hyper-platy clay component has a shape factor of at least about 40:1, and wherein the pigment blend has a sediment void volume of at least about 50 percent.

Abstract: A basecoat including a pigment blend, the pigment blend including at least a calcined clay and a hyper-platy clay, the hyper-platy clay having a shape factor of at least about 40:1.

Abstract: A basecoat including a pigment blend, the pigment blend including at least a calcined clay and a hyper-platy clay, the hyper-platy clay having a shape factor of at least about 40:1.

Abstract: The present invention relates to a kaolin composition having improved physical properties, for example, for use in the production of paper products. The composition can comprise kaolin having a shape factor of at least about 20. The kaolin can have a particle size distribution such that at least about 94% by weight of the kaolin can have an esd of less than about 2 ?m and/or at least about 80% by weight of the kaolin can have an esd of less than 1 ?m. The amount of the kaolin having an esd of less than about 0.25 ?m can range from about 25% to about 60% by weight. The Hercules viscosity of the kaolin product is less than 4000 rpm at 18 dynes at 63% solids and less than 1500 rpm at 18 dynes at 69% solids when measured using the “A” bob. The present invention also relates to an improved method for making the kaolin product from sedimentary kaolin.

Abstract: The present invention relates to a high surface area product and its production from solid-containing material, such as waste effluent from a paper-treating plant. The high surface area product comprises calcium carbonate, and is useful as a coefficient of friction control filler for newsprint.

Abstract: A pigment product for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin having a particle size distribution such that at least about 80% by weight of the particles have an equivalent spherical diameter less than about 2 &mgr;m and in the range of from about 15% to about 40% by weight of the particles have an equivalent spherical diameter less than about 0.25 &mgr;m and the particles have a shape factor in the range of from about 30 to about 60 and wherein the pigment product comprises a blend of Component A: a particulate kaolin in which the particles have a shape factor of at least about 45, and Component B: a particulate kaolin in which the particles have a shape factor of less than about 20.

Abstract: The present invention relates to a high surface area product and its production from solid-containing material, such as waste effluent from a paper-treating plant. The high surface area product comprises calcium carbonate, and is useful as a coefficient of friction control filler for newsprint.

Abstract: A pigment product for use in a coating composition to provide a gloss coating on paper, the pigment product comprising a processed particulate kaolin having a particle size distribution such that at least about 80% by weight of the particles have an equivalent spherical diameter less than about 2 &mgr;m and in the range of from about 15% to about 40% by weight of the particles have an equivalent spherical diameter less than about 0.25 &mgr;m and the particles have a shape factor in the range of from about 30 to about 60 and wherein the pigment product comprises a blend of Component A: a particulate kaolin in which the particles have a shape factor of at least about 45, and Component B: a particulate kaolin in which the particles have a shape factor of less than about 20.

Abstract: Paper coating composition comprising an engineered kaolin pigment containing stacks and platelets of unground coarse particles where greater than 96% by weight is less than 5 microns, of which some kaolinite books or stacks are concentrated in the greater than 1 micron size fraction; 88% to 95% by weight is less than 2 microns; 65% to 85% by weight is less than 1 micron; and 15% to 25% by weight is less than 0.25 micron. A first embodiment comprises particles with a shape factor Ad between 7 and 9 which represents a significant number of stacks and some platelets. A second embodiment comprises particles with a shape factor of 11 or 12 which represents the presence of some stacks with a majority of platelets. The kaolin clay pigments form clay-water slurries of 69% solids or greater. As a coating, the composition gives a G. E. brightness between 88 and 94. The engineered pigment is processed so that the desired shape factor is met, which shape factor is equated to the aspect ratio or morphology of the pigment.

Abstract: A kaolin clay pigment comprises a coarse kaolin clay or a blend of a coarse kaolin clay with a fine kaolin clay. The coarse kaolin clay is a delaminated and defined pigment product with an overall shape factor greater than about 12. If the coarse kaolin clay is fluid at about 65% to about 75% solids, then it is used by itself as the kaolin pigment. If it is not fluid, it is blended with a fine kaolin clay in amounts ranging from about 0.1% to about 30.0% by weight of the blend. The coarse kaolin clay fraction has a Hinckley Crystallinity Index greater than about 0.6 and the fine kaolin clay has a Hinckley Crystallinity Index less than about 0.5. The pigment has a G.E. brightness of about 90.5 and a particle size distribution such that at least about 90% by weight of the particles has an e.s.d. less than about 2 &mgr;m and about 30% by weight of the particles has an e.s.d. less than about 0.25 microns.

Abstract: Paper coating composition comprising an engineered kaolin pigment containing stacks and platelets of unground coarse particles where greater than 96% by weight is less than 5 microns, of which some kaolinite books or stacks are concentrated in the greater than 1 micron size fraction; 88% to 95% by weight is less than 2 microns; 65% to 85% by weight is less than 1 micron; and 15% to 25% by weight is less than 0.25 micron. A first embodiment comprises particles with a shape factor between 7 and 9 which represents a significant number of stacks and some platelets. A second embodiment comprises particles with a shape factor of 11 or 12 which represents the presence of some stacks with a majority of platelets. The kaolin clay pigments form clay-water slurries of 69% solids or greater. As a coating, the composition gives a G.E. brightness between 88 and 94. The engineered pigment is processed so that the desired shape factor is met, which shape factor is equated to the aspect ratio or morphology of the pigment.