Abstract: An aqueous coating composition for paper or paper boards comprising a mixture of smectite clay with starch in an aqueous solution wherein the starch comprises about 75 to about 95 percent by weight and the swellable clay comprises about 5 to about 25 percent by weight of the solids content of the aqueous coating composition. In addition, there is disclosed a process for the production of an aqueous coating composition for paper containing a smectite clay.

Abstract: A process is disclosed for the production of a blended smectite clay with enhanced rheology, particle size restriction and reduced abrasion characteristics which is useful for the coating of paper. The process comprises slurrying of a predominantly sodium smectite clay, slurrying a predominantly calcium smectite clay, degritting of the clay slurries to remove coarse grained impurities, removing a substantial portion of the undesirable soluble salts from the clay slurries, fractionating the clay slurries to control particle size of the smectite clays in the slurry and blending together the predominantly sodium smectite clay slurry with the predominantly calcium smectite clay slurry to form a blended clay slurry.

Abstract: A central processing system interfaces remote terminals through a dial-up telephone facility to complete various communication formats selectively involving either an audio response unit (ARU) or a telecommunications service representative station (TSR station). A substantial number of ARU's accommodate many calls simultaneously, executing formats whereby a caller is given voice cues or prompts to input digital data using the telephone keypad. Similarly, a substantial number of TSR stations accommodate calls in various formats with a prompting data display. Calls are selectively allocated to an ARU or a TSR station on the basis of time, call loads and call format. A programmable logic array cooperates with a host computer, load indicators and a clock (time class indicator) to implement a program of call allocation. Accordingly, the structure and process accommodate multiple-port, multiple-format operation.

Abstract: A process for beneficiating a poor grade crude kaloinitic clay mineral to produce a clay filler for use in papermaking to improve the brightness of the paper product. The crude kaolin clay is blunged with water containing a dispersing agent to form a high solids fluid aqueous clay suspension. This clay suspension is then screened and fractionated to reduce the particle size thereof to 92-95% finer than 2 microns. The fractionated clay suspension is treated with an alkaline leaching solution containing a reducing agent effective in converting ferric ions to ferrous ions and, preferably, a water-soluble anionic phosphate. The leached clay suspension, which has a solids content of at least 55%, is then treated with an oxidizing agent to oxidize unreacted leaching agent and byproducts formed during the leaching process.

Abstract: An organoclay-antiozonant complex suitable for incorporating in rubber formulations as an additive to inhibit and retard ozone attack is formed by complexing a substituted paraphenylenediamine antiozonant with an organoclay having been produced by treating a smectite-containing clay with a quaternary amine. The organoclay-antiozonant complex is preferably incorporated into the rubber formulation by first mixing the prepared organoclay-antiozonant complex with a naphthenic oil and a polar solvent to form a paste which is then added to the rubber formulation.

Abstract: An organoclay functional as a rheological modifier for control of the viscosity and thixotropy of polyester-styrene compositions is prepared by a dry process wherein a quaternary ammonium salt is reacted with unfractionated smectite in an aqueous dispersion thereby eliminating the fractionating step required in the typical prior art wet process as exemplified by U.S. Pat. No. 4,240,951 and permitting the preparation of the organoclay rheological modifier to be carried out at a high solids content thereby reducing drying costs in the recovery of the product organoclay.

Abstract: An organically modified smectite is produced by reacting unfractionated pulverized bentonite with an aqueous dispersion or solution of a methyl benzyl dialkyl ammonium halide salt via cation exchange. The product organoclay is equivalent in quality to a "wet" processed organoclay, and has particular utility as an ingredient in forming invert emulsion drilling mud for enhancing the rheological properties of the mud. An invert emulsion drilling mud derived from an organoclay produced by the method of the present invention will have a viscosity of at least seventy (70) centipoise at 26 C and a 10-second gel strength at 26 C of at least thirty (30) pounds per 100 square feet.

Abstract: A method of processing naturally occurring kaolin clay wherein ion exchange resins are utilized to remove charged soluble impurities from the clay thereby eliminating the filtration step required in conventional clay beneficiation process. Further, by saturating the ion exchange resin utilized with a bleaching agent, ferric ions in the clay will be reduced to soluble ferrous ions and removed from the clay without the conventional acid leaching.

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: 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 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: 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: 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: 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 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.