Abstract: Liquid developer compositions for use in developing a recording surface bearing an electrostatic latent image comprising finely divided colored marking particles substantially homogeneously dispersed in a carrier liquid, the colored marking particles comprising pigment particles substantially completely covered with a positive charge adjusting agent comprising a polymer of alkyl methacrylate-styrene-vinyltriethoxysilane. Imaging processes employing said liquid developer compositions are also disclosed.

Abstract: A storage-stable, readily-soluble detergent additive comprising particles, at least 70% of which have a diameter within the range of 0.1 mm to 1 mm consisting of from 1% to 75% by weight of at least one active material enhancing the washing, bleaching or biocidal effects of a detergent, substantially surrounded by and embedded in from 25% to 99% by weight of an enveloping material consisting of a mixture ofA. from 20% to 90% by weight of said mixture of at least one compound having a melting point above 30.degree.C, selected from the group consisting of fatty acids and fatty alcohols,B. from 0 to 50% by weight of said mixture of at least one water-soluble compound selected from the group consisting of poly-oxy-lower alkylene glycols, non-ionic surface-active compounds and anionic surface-active compounds, andC.

Abstract: A method for preparing a preconditioned dry electrographic developer comprising the steps of: a) intimately mixing together an unconsolidated mass of carrier particles, and an unconsolidated mass of resin based toner particles containing charge control agent in greater concentration than desired in the final developer, the concentration of said toner in the resulting mixture being less than desired in the final developer, such mixing being for a sufficient length of time and in such a way as to pack any pores of said carrier particles with toner, to scum the surfaces of said carrier particles with charge control agent, and to abrade the surfaces of said carrier particles; and b) introducing into and intimately mixing with said resulting mixture an additional quantity of resin based toner particles containing charge control agent in about the same concentration as desired in the free toner in the final developer, said additional quantity together with the free toner present after step (a) bringing the concentr

Abstract: Organic or inorganic particulate solid substances are coated with a polymeric material by dispersing the particulate solids, the surfaces of which have been treated so as to be compatible with the polymer coating, in a solution containing the polymer dissolved in a water-immiscible solvent, slowly introducing into the dispersion an aqueous solution of a hydrophilic protective colloid, thus producing an emulsifying liquid medium, and removing therefrom the solvent, to finally obtain polymer coated solid particles. The polymer-coated powder thus obtained is useful for application to various substrates by fluidized bed coating, electrostatic spraying, or electrophoretic deposition, followed by sintering to form films.

Abstract: Dry process for the production of inorganic granular substances coated with plastics, characterized in that a radical-polymerizable vinylic monomer carried on the surface of an inorganic granular substance is brought in a gaseous phase into contact with gaseous sulfur dioxide to effect polymerization of the monomer. The resulting plastic-coated inorganic substances are useful in various fields of industry, for example, as fillers, construction materials, molding materials, electrode materials, delayed-action fertilizers, etc.

Abstract: Chrysotile asbestos is chemically opened into the individual fibrils by soluble vinylic polymer polyelectrolytes containing carboxylic acid groups in aqueous media. Polyacrylic acids, polymethacrylic acids, maleic anhydride polymers and water-soluble copolymers thereof are preferred polyelectrolytes and form stable colloidal dispersions. The polyelectrolytes are neutralized to alkaline pH with inorganic or organic bases, but preferably with basic vinylic monomers when complete encapsulation is desired. By a further aspect of the invention the polyelectrolyte-coated fibrils in aqueous dispersion are encapsulated by copolymerization with (a) a basic vinylic comonomer (used for pH control) such as dimethylaminoethyl methacrylate, t-butylaminoethyl methacrylate or a vinylpyridine; and (b) a non-basic vinylic comonomer such as styrene, divinylbenzene, vinyl chloride or fluoride, vinyl acetate, methyl methacrylate, ethyl acrylate, acrylonitrile, and methacrylonitrile.

Abstract: The invention relates to the gettering of hydrogen and its isotopes, the gettering materials being painted or coated onto, or otherwise disposed in an area or volume from which hydrogen is to be removed.

Abstract: A process for producing resin-coated sand particles for use in shell moles wherein a phenolformaldehyde resin in an initial stage of condensation is sprayed into a hot zone to form droplets which gravitationally descend to a cold zone and solidify. The particles are mixed with sand, heated to a temperature above the melting point of the resin and coat the sand.

Abstract: Method and apparatus are described for applying a wax or plastic coating to phosphor grains to be added to explosives for tagging purposes. The coating is obtained by spraying from a nozzle a homogenous mixture of molten coating material and phosphor grains and permitting the droplets thus formed to solidify during free fall through a cooling medium such as air. The coated phosphors thus obtained when incorporated into an explosive render the mixture less sensitive to friction and impact than the corresponding mixture employing uncoated phosphors.

Abstract: A method is provided for the manufacture of coated calcium sulfate whisker fibers wherein the calcium sulfate whisker fibers are formed in an aqueous solution at about 110.degree.-150.degree.C, dryed, and preferably fired. Thereafter the resulting fibers are treated to form a protective coating on the fibers.

Abstract: A transition metal compound in powdered form or a mixture of a transition metal compound and other inorganic compounds in powdered form can be effectively coated with a polymer by contacting such powder with a vinyl monomer in the presence of hydrogen sulfite ions (HSO.sub.3 .sup.-).

Abstract: Sub-micron particle size ammonium perchlorate particles are made by mixing a solution of ammonium perchlorate in a volatile liquid with a second less volatile liquid which is miscible with the first liquid and is a non-solvent for ammonium perchlorate. The resulting mixture is heated to vaporize the volatile liquid and form a suspension of fine ammonium perchlorate particles in the second liquid. A particle coating agent soluble in the second liquid is used to limit particle growth. The particles are coated with the coating agent and may be recovered from the suspension by vaporization of the second liquid to form a powder, or by partial evaporization of the second liquid to form a concentrated slurry or paste in which the ammonium perchlorate is the disperse phase. The ultra-fine particles formed are suitable for use in propellant formulations.

Abstract: Particulate solids are coated with a polymer by bringing a particulate solid selected from glass particles, abrasive particles and sand particles into contact with a vinyl monomer in the presence of a polymerization intiator consisting essentially of bisulfite ions.

Abstract: Children's playground toys constructed from used tires are coated with an epoxy resin coating which is resistant to abrasion, temperature fluctuations and which adheres firmly during flexing and stretching of the tires during use. The coating enhances the visual appearance and functional characteristics of the equipment and prevents rub-off from the tire bodies onto the skin or clothing of children using the playground toys.

Abstract: Individual glass fibers are coated with a combined sizing and coating composition that includes a zinc salt having a solubility constant (K.sub.s) of not less than 1 .times. 10.sup.-.sup.3 complexed with ammonia as a substitute for all or part of the resorcinol-formaldehyde resin. The preferred combined sizing and coating composition includes as the latex constituent, a styrene-butadiene vinylpyridine terpolymer, as the resin constituent, resorcinol-formaldehyde and zinc sulphate complexed with ammonia and as the coupling agent, a silane selected from amino, amido, chloropropyl, epoxy, ureido-functional silanes. An aqueous solution of the combined sizing and coating composition is prepared and the individual glass fibers are coated shortly after attenuation with this combined sizing and coating composition. The coated individual glass fibers are thereafter gathered into strands and the strands are dried while spaced from each other. The dried strands are thereafter, collected on a forming tube.

Abstract: Semi-conducting materials which may be used in preparing resistors may be prepared by treating a refractory oxide with a pyrolyzable organic compound at an elevated temperature and thereafter further treating the resultant semi-conducting pyropolymeric inorganic refractory oxide composite material at an elevated temperature with subsequently controlled cooling rate to provide a material which possesses a lower resistivity and a controllable temperature coefficient of resistance over a wide range.

Abstract: A method of coating electrostatographic carrier particles comprising introducing an upwardly flowing low pressure gas and a centrally located upwardly flowing high pressure gas at about one-third their full flow rate into a combined fluidized bed and spouted bed coating apparatus, loading carrier particles into the coating apparatus, increasing the flow rate of the low pressure gas to its full flow rate of about 305 cubic feet per minute with heating to heat the carrier particles, increasing the flow rate of the high pressure gas to its full flow rate of about 16 cubic feet per minute at about 1.

Abstract: An electrostatographic developer mixture comprising finely-divided toner particles electrostatically adhering to the surface of highly shape-classified low carbon hypereutectoid steel carrier particles, the steel carrier particles comprising carrier cores having a composition comprising about 95.0 to 99.0 parts iron, 0.1 to 2.0 parts carbon, 0.5 to 2.0 parts manganese, 0.5 to 2.0 parts silicon, 0.03 to 0.1 parts aluminum, 0.01 to 0.05 parts phosphorus, and 0.02 to 0.05 parts sulphur, said carrier cores having been heat treated to a tempered martensitic microstructure with an average hardness of 40-55 Rockwell C and then overcoated with a coating material capable of electrostatically releasing toner particles adhered thereto to an electrostatic latent image. Processes of employing said developer mixture in electrostatographic imaging systems are also disclosed.

Abstract: Metal powder is suspended in an aqueous medium containing a radical-polymerizable monomer and polymerization is conducted in the presence of an acidic sulfite ion to produce a plastic coated metal powder which is effectively used for forming conductive plastics, molded articles for sintering, pressed powder magnetic cores and the like.

Abstract: A Method of coating particulate materials (such as silica sand, glass beads, seeds and metal particles) with a liquid thermosetting epoxy resin which comprises agitating the epoxy resin with the particles in a nonpolar liquid, which is immiscible with the epoxy resin, and contains a nonionic surfactant having a molecular weight of at least 2,000 to retard the tendency of the epoxy coated particles to agglomerate during curing of the resin in the non-polar liquid. A suitable liquid for use as the immiscible liquid is a paraffinic oil which is aromatic-free and olefin-free.