Abstract: A stable calcined clay slurry and method of preparing the same are provided by adding to a calcined clay suspension containing at least 50% clay in aqueous medium about 0.30% to 0.49% by weight of anionic polymer and about 0.007% to 0.011% by weight of cationic polymer by weight in the slurry.

Abstract: Kaolin (clay) platelets in water are flocculated with an acid (pH 3.0) to form "structured agglomerates", which are stabilized by reacting with an urea-formaldehyde prepolymer. The urea-formaldehyde prepolymer forms polymeric agglomerated particles when it comes in contact with the catalytic, acidic kaolin "structured agglomerates." The urea-formaldehyde polymeric agglomerated particles cause adhesion or stabilizing of the structured kaolin agglomerates to form a three-dimensional network of "open structure" with a large number of microvoids (pores). The urea-formaldehyde polymer in the stabilized product varies from 5 to 95% by weight based on the total weight of the final product.The size of the primary particles of the urea-formaldehyde polymer is from 0.1 to 0.7.mu. (micron). The size of the kaolin platelets is from 0.1 to 10.mu. (microns). The structured agglomerates of kaolin-urea-formaldehyde possess a size ranging from 0.25 to 40.mu. (microns).

Abstract: A method for producing kaolin pigments of improved coated brightness and opacity is provided in which kaolin is degritted, heated to the level of substantially minimum brightness and then leached. The kaolin may be comminuted before treatment, after heating or after leaching to control particle size distribution.

Abstract: A method and composition for control of rheological properties of polyester-styrene resin compositions is provided in which a smectite is reacted with a quaternary ammonium salt to provide a desired level of quaternary ammonium salt thereon and the treated smectite is added to a polyester-styrene resin mixture to produce a desired level of viscosity.

Abstract: A method of beneficiating highly discolored clays to produce a clay of acceptable quality to the paper industry is provided by passing a deflocculated clay suspension through a high intensity magnetic separator, thereafter selectively flocculating the clay from the suspension and recovering the flocculated clay be removing the supernatant liquid.

Abstract: A method and apparatus are provided for classifying fine particle materials from a fluid suspension in the form of a rotatable cylindrical bowl, a rotatable shaft on which said bowl is rotated, means for independently rotating each of said bowl and shaft at appropriate differential speeds, a circular baffle on said shaft within said bowl between the ends of said bowl, defining one, of three, consecutive pools, a helical conveyor on said shaft on one side of said baffle in said one pool, said conveyor extending radially to a point adjacent the periphery of the bowl, a second pool beginning on the opposite side of said baffle and extending toward the effluent end of the bowl, a helical series of discontinuous radial spokes extending from said shaft in said second pool, and extending to points adjacent the periphery of the bowl, said second pool ending at a point where it joins a third pool of equal cross sectional dimension and extending toward the effluent end of the bowl, a ribbon-conveyor mounted on said sha

Abstract: Delamination of the coarse fraction of washed secondary kaolin clay results in a product that is brighter than the starting material, has a degree of whiteness rivalling that of imported English clays, and is composed chiefly of platy particles of various sizes.

Abstract: A color developing coating and coated paper are provided in which a paper sheet is coated with a mixture of dispersing agent, adhesive and a reactive pigment made up of essentially from the group bentonite and montmorillonite admixed with kaolinite, a polyvalent cation and a ligand.

Abstract: An oxidizing clay for pressure sensitive record materials is provided by treating an acid leached clay with cupric salts.

Abstract: An electroconductive clay coating for electrophotography having solvent hold-out characteristics is provided comprising an expandable clay, an alkali metal salt, and at least one organic compound from the group consisting of sugar syrups, anionic organic compounds and fluorochemicals. In those compositions using anionic organic compounds a synergism with the expanded clay appears to result.

Abstract: This invention provides a high bulking clay consisting essentially of selectively flocculated ultra fine particles of clay coated with a member from the group consisting of polyfunctional amines and long chain amines.

Abstract: A high bulk clay product and method of making the same are provided in which kaolinite is selectively flocculated to produce an ultra fine particle fraction in the presence of fine mica below 150 mesh in size and the resulting flocculant is collected and dried.

Abstract: A high bulk clay product and method of making the same are provided in which kaolinite is selectively flocculated to produce an ultra fine particle fraction in the presence of fine mica below 150 mesh in size and the resulting flocculant is collected and dried.

Abstract: A transition fitting for connecting plastic conduit to various elements of a fluid transfer system is provided which includes in combination a pressure deformable plastic conduit, rigid sleeve means inserted in one end of said plastic conduit in circumferential contact therewith, a pressure deformable rubbery resilient member extending around the conduit and sleeve in contact with said conduit, compression ring means extending around the conduit and sleeve having a radial face abutting one face of the resilient member and applying compressive pressure thereon, a radially expandable and contractible frusto-conical gripping member, said gripping member surrounding the conduit and sleeve and having a base portion engaging the other side of the compression ring, spaced surface engaging means on the gripper member in contact with the exterior of the conduit, a first body member surrounding the conduit and sleeve and confining the rubbery gasket against outward radial expansion, said body member and compression rin

Abstract: Reactive pigments and methods of producing the same for use in manifold copy systems is provided in which a member from the group consisting of bentonite and montmorillonite is admixed with kaolinite, added to an aqueous solution of a polyvalent cation, a ligand is added and the solids separated, dried and pulverized.

Abstract: A color developing coating and coated paper are provided in which a paper sheet is coated with a mixture of dispersing agent, adhesive and a reactive pigment made up of essentially from the group bentonite and montmorillonite admixed with kaolinite, a polyvalent cation and a ligand.

Abstract: An expandable pipe line plug and tool are provided having a flexible stopper plug normally capable of insertion axially into a pipe to be sealed and expandable into sealing engagement with said pipe, said plug having an expandable portion actuated by relative movement of a nut and a threaded bolt having a circular head and landed shoulder beneath the head and a tool having an outer hollow member adapted to engage the nut at one end and an inner member axially of the hollow member having gripping means adapted in one position to pass over the circular bolt head and in a second position to engage the bolt head and landed shoulder whereby relative rotation of the outer hollow member and inner member causes relative rotation of the nut and threaded bolt to expand and contract the expandable member.

Abstract: Reactive pigments and methods of producing the same for use in manifold copy systems is provided in which a member from the group consisting of bentonite and montmorillonite is admixed with kaolinite, added to an aqueous solution of a polyvalent cation, a ligand is added and the solids separated, dried and pulverized.

Abstract: A seal for meters and the like is provided having a generally rectangular housing with a central slot passing therethrough, a generally U-shaped shackle member having at each end a reversely bent inwardly extending hook insertable in said slot and keeper means inserted into said slot from the end opposite the shackle member, said keeper means having opposed notches intermediate its ends engaging the hook means of the shackle within the housing and breakable stop means on the keeper means limiting movement of the keeper into the slot to hold the notches and hook means in the housing and when the stop means are broken to permit the keeper to pass fully through the slot.

Abstract: A reinforcing pigment for elastomeric materials is provided in the form of kaolin treated with an organic acid containing functional groups such as -NH.sub.2, -SO.sub.3 H and -SH.