Abstract: A composite particulate pigmentary material is disclosed which comprises an association of at least two chemically distinct materials in which the particles of one material carry a positive surface charge and the particles of the second material carry a negative surface charge and particles are held in association as a result of these surface charges. Also disclosed is a method for preparing composite particulate pigmentary material comprising forming aqueous dispersions of two particulate materials under conditions in which the surface charges of the particles of the two materials are of different signs and mixing the dispersions. Typical materials useful for preparing the composite include inorganic pigments, fillers and extenders and organic polymeric microspheres. The product is useful as a pigment in, for example, paints, inks, paper and plastics.

Abstract: A composite particulate pigmentary material is disclosed which comprises an association of at least two chemically distinct materials in which the particles of one material carry a positive surface charge and the particles of the second material carry a negative surface charge and particles are held in association as a result of these surface charges. Also disclosed is a method for preparing composite particulate pigmentary material comprising forming aqueous dispersions of two particulate materials under conditions in which the surface charges of the particles of the two materials are of different signs and mixing the dispersions. Typical materials useful for preparing the composite include inorganic pigments, fillers and extenders and organic polymeric microspheres. The product is useful as a pigment in, for example, paints, inks, paper and plastics.

Abstract: A towed type beet harvester includes a main frame having ground engaging wheels and having a lifter wheel assembly for excavating beets, potatoes, carrots and similar root crops. A front set of grab rollers are positioned rearwardly of the lifter wheel assembly and are coated with a high impact plastic material to minimize damage to the harvested crop. A rear set of grab rollers are positioned rearwardly of the front set of rollers and are also coated with a high impact plastic material. A vertically disposed discharge wheel assembly is positioned interiorly of the harvester main frame and conveys harvested crop to a reversible discharge conveyor. An open top holding tank is mounted at the rear of the harvester for temporarily holding the harvested crop during the harvesting operation.

Abstract: Compositions suitable for use as a camouflage material are based on vesiculated granules of polymer material which are substantially free of titanium dioxide but contain a light reflecting agent. The agent is an oxide, hydroxide or insoluble salt of magnesium or an insoluble mixed salt of calcium and magnesium and is present in an amount of at least 10 percent by weight of the polymeric material. Preferably the agent is dolomite. Paints containing the composition are useful as camouflage in snowy conditions and the aqueous paints are removable by scrubbing.