Abstract: A process for preparing a metal-coated hollow microsphere comprising the combination of steps of: (a) vigorously admixing a major quantity of hollow cenospheres/microspheres with a thermo-setting binder adhesive until the cenospheres are wet-out; (b) slowly adding metal flakes to the thus wet-out cenospheres of step (a) until the wet-out cenospheres are fully coated with the metal flakes; (c) binding the metal flakes to the said wet-out cenospheres by slowly increasing the temperature of the metal coated wet-out cenospheres from step (b), the temperature being raised up to about 350.degree. F.; and (d) the metal-coated cenospheres of step (c) are intermittently admixed in the absence of any further heating until dry. The dry product is ready for packaging.

Abstract: A surface treatment method for magnetic particles is disclosed, which comprises the steps of activating magnetic particles by application of heat thereto, treating the surface of the magnetic particles with a reactive silane coupling agent, bringing the treated magnetic particles into contact with at least one polymerizable vinyl-type monomer, polymerizing the monomer to form a polymer, and coating the surface of the magnetic particles with the polymer.

Abstract: A method for producing a finely distributed powder, which contains a thermoplastic synthetic material, where, in order to form particles containing the synthetic material, thermoplastic synthetic material is introduced in a non-aqueous carrier substance, which is liquid in the melting temperature range of the synthetic material, and is mixed in the melting temperature range with the carrier substance, and ground lime is then added to this mass, and thereafter an aqueous slurry is added to the mass. By the reaction between the lime and the aqueous slurry, the mass is converted to a powder containing synthetic material, More particularly,bitumen is selected as a carrier substance. The powder can preferably be introduced to produce a synthetic material-containing bituminous binder for building materials.

Abstract: Process for the conditioning of waste, such as radioactive or toxic waste, whose acidity can inhibit polymerization reactions, e.g. waste containing cation exchange materials.This process consists of incorporating the waste into a liquid epoxy resin at ambient temperature and then bringing about the polymerization of the resin by means of a hardener, in order to obtain a solid block.A hardener containing at least one compound having at least one NH.sub.2 group in an adequate quantity for blocking the active sites of the cation exchange materials present in the waste or for neutralizing the acidity of the humid waste and for polymerizing the epoxy resin is used.This process can be more particularly used for conditioning resin beds used for the purification of the water of nuclear power stations.

Abstract: The invention relates to a general method of producing progressively burning deterrent-coated powder, more particularly propellant powder for weapons having barrels. According to the method a film-forming, preferably polymerizable deterrent substance is fed to the powder loosely or dispersed in a liquid phase which is thereafter driven off. The invention also relates to a method of giving a deterrent coating to granular powder or powder cut up in to short pieces (so-called tubular powder) in a fluidized bed. Finally, the invention relates to a special deterrent substance in the form of a water-dispersable polyurethane built up on an aliphatic isocyanate and a caprolacton polyester.

Abstract: An improved laser markable material useful for encapsulation of electronic devices is obtained by adding TiO.sub.2 or TiO.sub.2 +CrO.sub.3 to common plastic encapsulants formed from a mixture of a resin+filler+carbon black+mold release agent. When irradiated by a laser, the originally grey material turns bright gold, providing a high contrast durable mark. The material has excellent marking contrast as well as better stability with time and temperature as compared to prior art laser markable encapsulants. Desirable concentrations, in weight percent of the compound, are 1-5% TiO.sub.2 and 0-3% CrO.sub.3, with 1-3% TiO.sub.2 and 0.5-2% CrO.sub.3 being preferred. Carbon black is optional but a concentration in the range 0.1-3% by weight is desirable with 0.5-1% preferred. Improved encapsulation and marking methods and improved devices using this material are described.

Abstract: A first stable suspension of at least one solid monomer, capable of being polymerized to a condensation polymer when heated, is formed in a first organic liquid inert during polymerization and containing a minor amount of a dispersing agent stable during said polymerization. A second stable suspension of finely divided inorganic particles in a second organic liquid inert during said polymerization and miscible with said first organic liquid, is formed and contains a minor amount of a dispersing agent. The first suspension is then added to the second suspension while stirring and heating the second suspension to the polymerization temperature of the monomer.

Abstract: The instant invention is directed to a method for suppressing dust comprising contacting the material being treated with an aqueous emulsion of a methacrylate polymer or a composition comprising a hydrophobic liquid and a methacrylate polymer. These emulsions and compositions may further comprise a wetting/penetrating surfactant.

Abstract: Coating method and apparatus, in which jet streams of a high-pressure fluid are ejected in the opposed directions into a pulverization zone in a pulverizer to hit a raw material conveyed by one of the jet streams on the other and thereby pulverize the same, the surfaces of particles of the resultant raw material are coated at the same time that the pulverization is done. The raw material to be pulverized is fed into the pulverization zone with a jet stream or by a mechanical means to be then accelerated by a jet stream therein. A coating material is fed in the same direction in which a jet stream flows, or directly into the pulverization zone.

Abstract: An imaging material and process employing photosensitive microcapsules useful in forming two or more image colors by exposure with an intensity or time modulated radiation source such as a laser; the imaging material comprises a support having at least two sets of photosensitive microcapsules on the surface, one set of microcapsules is made up of high speed microcapsules which are more sensitive to a predetermined actinic radiation than a second set of microcapsules made up of lower speed microcapsules; the microcapsules include a photosensitive composition which undergoes a change in viscosity upon exposure to actinic radiation; first and second image-forming agents are respectively associated with each set of microcapsules; the imaging material is useful in forming images of two or more colors by a process which comprises image-wise exposing the imaging material to actinic radiation at a first exposure amount which is substantially quantitatively different than the second exposure amount, and subjecting the

Abstract: Inorganic fillers such as silica balloons are used as a lightweight filler for resin moldings. But the specific gravity of these inorganic fillers is about 0.2 at most, so that there is a limit to reduction in weight. The foamed product of organic polymers is obtained as a lightweight substance, but it is hardly put to practical use because of its poor solvent resistance and thermal resistance.The microballoon of the present invention is produced by coating the surface of a hollow particle having the wall film of a thermoplastic high polymer with a thermosetting resin.The present invention provides a microballoon having excellent solvent resistance and thermal resistance as well as a very low specific gravity, and said microballoon is useful as a lightweight filler for resin moldings, aggregate for FRP, ingredient for paints, and the like.

Abstract: A process for preparing a proppant charge comprising individual sand particles coated with a pre-cured thermosettable resin. Sand is mixed with melted resin, and the resin-coated sand is heated under conditions which cure the resin. Mixing is carried out with sufficient mechanical shearing action to limit agglomeration of the resin-coated sand particles.

Abstract: The invention relates to a thermoplastic composite material for the preparation of moulded objects, particularly of injection-moulded objects, and to a process for making same. The material according to the invention has the following composition by weight:______________________________________ polypropylene between 50 and 60% and preferably 55% glass spheres from 5 to 15% and preferably 11% polyvinylic alcohol from 25 to 40% and preferably 33% ______________________________________The invention is more particularly applicable to making moulded objects such as containers or medical syringes adapted to be subjected to sterilization.

Abstract: A pre-cured proppant charge useful, for example, for propping a fracture in a subterranean formation is disclosed. The charge is made up of a large number of particles composed of a single substrate particle which can be silica sand, glass beads, or the like, coated with a thermoset resin. The thermoset resin is one which, when it is the resin coating on particles of a proppant charge, produces such a charge when the Conductivity Ratio, as defined herein, throughout a given closure stress range is greater than that of a charge of the uncoated particles. The proppant is produced by coating the particulate substrate with a suitable thermosettable resin, controlling the coating step to produce substrate particles coated with a fusible, thermosetting resin, and curing the resin by heating the coated particles, so that substantially all of the resin coated particles are composed of a single substrate particle with a thermoset resin coating thereon, prior to introduction into a subterranean well.

Abstract: An alkali-proofed cast aluminum product having a wear-resistant surface layer thereon comprising a number of wear-resistant granules with partially projected form inserted into the surface of a base material containing aluminum as a main component, cavities open to the surface of said base material being filled with a first alkali-resistant impregnating material, and the whole surfaces of the base material including the wear-resistant granules being covered with a coating of a second alkali-resistant material is excellent in alkali resistance and prevents the wear-resistant surface from the falling out of wear-resistant granules.

Abstract: The use of an aromatic amine salt of a substituted pentafluoroantimonic acid as a curing agent for epoxy resins, and the use of the epoxy resin compositions as binders for abrasives in abrasive sheet products, are disclosed. The aromatic amines are selected from aniline and hindered aromatic amines.

Abstract: A denture cleansing composition of the hypochlorite type is rendered substantially free of hypochlorite chlorine odor by incorporating into the composition a hypochlorite deactivator. The deactivator is released into the cleansing solution at a controlled rate to optimize cleansing efficacy at a reduced hypochlorite/chlorine odor. The deactivators suitable for use in this invention include sodium perborate monohydrate and sodium nitrite. The preferred method of controlling deactivator release rate is by encapsulating the deactivator.

Abstract: A method is disclosed of applying glue to loose fibrous material which is revolved relatively rapidly in a confined space. While this is happening, the glue and air under slight excess pressure are fed to the material from approximately the center of the space. Apparatus for this purpose comprises a container, a hollow shaft rotatably mounted in the container, and a plurality of rod-like tools secured to the hollow shaft. Each of the tools is generally cylindrical, and is provided with a central longitudinal bore one end of which opens into the hollow shaft and the other end of which is closed. Each tool has a longitudinally-extending flat external surface portion, and a plurality of substantially radial bores communicating with the central longitudinal bore. The radial bores of each tool terminate at the external surface of that tool in the zone of said flat portion thereof.

Abstract: This invention relates to a novel metal pigment product which is comprised of metal particles, terpene phenol resin and polyethylene resin and the process for making them. The compositions and products made from them, are stable even after storage at room temperature or being subjected to a heat aging test. Films or coatings made from these products have a uniform dispersion of the metal particles.

Abstract: The invention relates to a method for providing a shaped carbon article of low green or crude density and high porosity, in particular for heat insulation, by means of which it is intended to produce shaped carbon articles of actually any dimensions and configurations from comparatively inexpensive organic materials, also from waste products from the paper-making industry. According to the invention, this is done in that paper particles in platelet form having an average diameter of from 0.5 to 5 mm and an average thickness of from 0.01 to 1 mm and/or in strip form having an average length of from 5 to 100 mm, an average width of from 0.5 to 10 mm and an average thickness of from 0.01 to 1 mm, which include an ash content of from 0.005 to 5%, are impregnated with a carbonaceous binder, in that the paper particles are thereupon shaped to form an article and said article is then through a corresponding temperature treatment condensed, carbonized and optionally graphitized.

Abstract: The present invention relates to a process for growing cell cultures of diploid cells. The process comprises the steps of(a) introducing cell culture medium into a container containing cell support prepared by applying to glass or polysaccharide base support a solution of thermosetting plastic material comprising the reaction product of an aldehyde with a polyvinyl alcohol and then subjecting said support thus-coated to the effect of heat under sufficient conditions to permit hardening of said thermosetting plastic material and the sterilization of the thus-coated support;(b) adding human or animal diploid cells to the culture medium of step (a) to form a cell-containing culture medium; and(c) maintaining the cell-containing culture medium of step (b) under cell growth conditions.

Abstract: A process for consolidating the surface of a granular adsorbent, wherein a water-containing adsorbent, which has taken up 25-70% by weight of the maximum possible amount of water, is heated to a temperature at which the water taken up evaporates, and is at the same time treated with an aqueous dispersion of a self-crosslinking copolymer, and the adsorbent thus coated is heated to a temperature at which the copolymer crosslinks. The coated adsorbent has virtually the same adsorption and desorption properties as the untreated adsorbent, but in contrast exhibits substantially improved abrasion resistance.

Abstract: A process for consolidating the surface of a granular adsorbent, wherein thermoplastic crosslinkable bonding fibers are applied from aqueous suspension, the water taken up by the adsorbent is evaporated off and the bonding fibers adhering to the surface of the adsorbent are crosslinked by heating. The adsorbent thus treated has virtually the same adsorption and desorption properties as the untreated adsorbent, but exhibits substantially improved abrasion resistance.

Abstract: Solid materials, especially pharmaceutical preparations, are coated, without the use of solvents, with a powdered film-forming polymer and with a liquid plasticizer having an affinity for the polymer.

Abstract: Expanded perlite is produced while simultaneously or substantially simultaneously coating the expanded perlite with an hydrophobic coating material by passing the expanded perlite and heated expander exhaust gases from the expansion chamber through a cooling and coating chamber provided with spray nozzles to provide a stream of atomized coating material onto the expanded perlite, while upstream thereof an air intake and temperature sensor are situated to control the air flow and temperature in the cooling and coating chamber so as to provide proper curing temperatures for the coating material upon the expanded perlite before it is separated from the exhaust gases.

Abstract: Mineral filler materials are provided with improved hydrophobic coatings by pressure coating of porous minerals using steam as a carrier for the coating material. Thereby more complete sealing of fissures and cracks in the porous filler materials' surface is provided, resulting in very water-resistant coated particles useful in filling polymeric substrates such as paints, plastics and joint compounds.

Abstract: A polymer-coated particulate inorganic material, e.g. graphite, graphite fluoride or molybdenum disulfide, is obtained by preparing a reaction system containing a liquid medium, fine particles of the inorganic material, at least one vinylic monomer which undergoes radical polymerization or copolymerization and a polymerization initiator and allowing the vinylic monomer(s) in the reaction system to undergo polymerization and to bond to the surfaces of the inorganic material particles by graft polymerization. To enhance the efficiency of graft polymerization to thereby realize uniform coating even when the inorganic material is very low in surface energy as typified by graphite fluoride, the pH of the reaction system is adjusted to a value ranging from 5 to 9 by adding alkali to the reaction system soon after the addition of the polymerization initiator or alternatively by treating the inorganic material with alkali in advance of preparation of the reaction system.

Abstract: A method and apparatus for microencapsulating an electroluminescent phosphor with an extremely thin coating. The process involves vaporizing a poly-para-xylylene, pyrolyzing the resulting vapors to form reactive monomeric radicals, and then passing such vaporous radicals to a vacuum deposition zone where they contact tumbling particles of an electroluminescent phosphor under vacuum conditions. As the particles are being coated, they are sifted by means of a screen. The reactive monomeric radicals deposit on the tumbling particles, are adsorbed by the particles, and polymerized into a very thin coating on the surfaces of the particles.

Abstract: A thermal energy storage composite pellet-shaped product of about 1/8 inch to 1 inch in size, formed of an outer seamless shell member which defines a cavity that permanently encases a phase-change composition, the composition being present in a quantity such that the total volume of the composition, whether in its solid form, liquid form, or both forms as in its transition state, never exceeds the volume of the cavity; and a process for making the product which includes using the phase-change composition in a compacted powder form as cast about which the shell member is formed by roll-coating steps.

Abstract: The present invention provides a method of preventing the segregation of powders of different specific gravities in a metal powder composition. The powder metal is admixed with the powders of lesser specific gravities, and furfuryl alcohol is added at the same time. While mixing, an acid is added to react with the furfuryl alcohol to convert the alcohol to a solid resin film on the powder metal particles. The powders of lesser specific gravities are bonded to the metal powder particles by the resin, and segregation of the metal powder and the lighter powders is eliminated.

Abstract: The present invention relates to the use of thermosetting plastics for improving supports used for cell growth. The process according to the invention consists of applying to base supports, a solution of a thermosetting plastics material and of then subjecting the thus-coated supports to the effect of heat under conditions sufficient to permit the hardening of the thermosetting plastics material and sterilization of the thus-coated supports. The supports according to the invention are suitable for any conventional seeding and trypsination operations on cell cultures; they can also be used for the cultivation of human or animal diploid cells.

Abstract: The strength of ice is reduced by dissolving in water prior to freezing a composition of (A) a water-soluble polyhydroxy compound or monoalkylether thereof and (B) a water-soluble organic nonvolatile compound having a hydrophilic group such as amine, carboxyl or carboxylate groups in an amount to provide an effective amount, e.g., on the order of about 0.25-5 weight percent, of (A) plus (B) based on the weight of water. The method is especially useful for application to particulate solids, such as coal and mineral ores, which are shipped and stored in masses exposed to freezing temperatures. Any ice that is formed is physically weak and will not deter the unloading of the thusly conditioned particulate solids.

Abstract: In accordance with the invention an apparatus and method are provided for curing resin-coated particles on a heated rotating surface. A single layer coating of uncured resin-coated particles is fed to the heated rotating surface. As the surface continues to rotate the uncured resin-coated particles become tacky and adhere to the rotating surface. The tack adhesion prevents the pull of gravity from separating the particles from the surface as rotation continues. Proper curing of the particles occurs on the heated rotating surface before one complete revolution is made by the surface. Cured particles are removed by a stationary scraper blade edge which rides the rotating surface and wedges between the adhering particles and the surface as the surface rotates past the edge.

Abstract: Fibers coated with polymer are prepared by adding the polymer to a fiber material, typically cellulose pulp, and subjecting the fiber material with the added polymer to impact of grinding forces in a defibrator, typically a hammer mill. The resulting fibers are very efficiently coated with the polymer and are suitable as binder fibers in fibrous materials consisting completely or partially of the coated fibers bonded through the polymer, and as reinforcing fibers in fiber-reinforced cement products. The polymer is preferably applied as a hot melt, and the defibration is performed immediately after the application.

Abstract: The present invention relates to magnetic toners and processes for producing them. The toner materials that are produced have the color of the magnetic material substantially obscured while still maintaining the high percentages of magnetic materials necessary for many types of magnetic printing processes. Further, the toners may be provided with a desired shade or color with dyes or pigments. The process of production preferably involves the coating of the individual magnetic particles with low-density essentially opaque polymeric particulate material having an affinity for the magnetic particles, thereby obscuring the color of said magnetic particles. The resulting coated particles may be intermixed with dyes, pigments, binders and other material as desired to produce toners which are useful for a variety of purposes, including multi-color reproduction techniques.

Abstract: A continuous method for making free-flowing, melt-coated elastomeric pellets is disclosed in which pellets are coated with particles of coating material in a zone of interference created in a pneumatic conveying system.

Abstract: A polymer reinforcing material, consisting of a particulate or filamentary mineral component having a thin polymer-interactive layer, averaging about 5-500 Angstrom in thickness, of silicon-free and heavy metal-free organic molecules chemically bonded to its surface by covalent bonding, when used in relatively small amounts in the range from 1 to 20 phr is capable of providing superior retention or increase of desirable polymer properties especially impact resistance, compared to the use of conventional reinforcement in the same polymer, while providing increased stiffness and retention of strength at elevated temperatures.

Abstract: Magnetic carrier particles for electrophotographic developers are coated with a thermoplastic resin by agitating a dry mixture of carrier particles and resin particles in a magnetic field. Thereafter, the mixture is heated to bond the resin to the carrier particles, which then need no further treatment to improve their conductivity prior to use in an electrophotographic developer.

Abstract: In a process for the preparation of an electrostatographic toner material suitably employable for pressure fixing process, comprising encapsulating a core material containing colorant with a shell material selected from the group consisting of a melamine resin and a urea resin in an aqueous medium to prepare encapsulated toner particles and spray-drying the so prepared toner particles, the improvement in which the spray-drying of the toner particles is carried out in the presence of a cationic compound selected from the group consisting of a cationic surface active agent and a cationic polymer.

Abstract: An improved hydrophobic composite is prepared by depositing on a particulate or granular core material an adherent first coat comprising a film-forming polyurethane and, optionally, asphalt, and applying to the thus-coated core material a hydrophobic colloidal oxide, such as hydrophobic fumed silica. The composites are useful in various waterproofing applications, as well as in cleaning up oil spills.

Abstract: A process for treating fillers with a fluorosilicone compound comprising contacting a filler more preferably a silica filler with a fluorosilicone nitrogen compound. Such a treated filler is preferably incorporated in fluorosilicone room temperature vulcanizable silicone rubber compositions and heat vulcanizable silicone rubber compositions.

Abstract: A process is provided for treating impure silica-containing sands to make them more suitable for foundry use. The sands are treated with aqueous alkali metal silicate solutions and the resulting mixture is heated before the sands are coated with a resin binder. Foundry cores and molds prepared with these treated sands show improved hot and cold tensile strengths.

Abstract: Electrical breakdown of a gas insulator in high voltage apparatus is preved by placing an electrical insulative coating on contaminant particles in the gas insulator.

Abstract: The process for preparing a resin-coated casting sand by coating sand grains with a binder comprising a liquid phenolic resin component and a polyisocyanate component, the improvement of which comprises coating sand grains with an organic solvent prior to coating of the sand grains with the binder, thereby prolonging the bench life of the resulting resin-coated casting sand and enhancing the strength of a casting mold prepared from this resin-coated casting sand. Furthermore, this process enables the utilization of sand of a low grade or reclaimed sand having a high alkaline component content, that has not been used in the conventional process, and the supply of an excellent resin-coated casting sand which is capable of providing a casting mold having a high strength and has a long bench life.

Abstract: Several new treatment processes and compositions for practicing these processes are provided which substantially alter the fluid flow and surface characteristics of porous permeable particulate formations, especially subterranean formations intersected by an oil well. The compositions of this invention also provide methods of increasing viscosity or gelling aqueous fluids, especially acids, which can be used to treat such earthen formations. Treatment of the earthen formations with the compositions of this invention can substantially modify the permeability and surface characteristics of the formation to prevent or reduce the flow of aqueous fluids, especially water and formation brines through that portion of the formation, thereby reducing the water-oil ratio of fluid flowing through or produced from that formation and in some cases enhancing the hydrocarbon production. The treatment of this invention uses branched organic polymers of a wide molecular weight range.

Abstract: A particle suitable for use as an electrode material comprising a substrate at least partially coated with an admixture of a hydrophobic material and an electrochemically active, electrically conductive catalyst.The invention includes a method for producing the coated particles.

Abstract: In a process for the preparation of an electrostatographic toner material comprising encapsulating a core material containing colorant with a shell material in an aqueous medium to prepare encapsulted toner particles and drying the so prepared encapsulted toner particles, the improvement which comprises washing the encapsulated toner particles with an aqueous solution of a surface active agent in advance of subjecting them to the drying procedure.

Abstract: Coated magnetizable particles of sub-micron size are used to form reversible suspensions in which the particles may be magnetically aggregated and thereafter resuspended as desired. Each microparticle comprises a core composed essentially of a magnetically-responsive material having a Curie temperature within the range of about 5.degree. to 65.degree. C. and a magnetic moment at saturation of at least 2.0 .mu..sub.B at 4.2.degree. K., and a coating about the core formed of a solid cross-linked polymeric material having chemically reactive groups at the surface thereof.

Abstract: A method for the preparation of conductive graphite particles useful as an electrically anisotropic support layer for an electroconductive transfer film comprising initially grinding a slurry of graphite particles in the presence of water or a solvent having freezing and vapor pressure properties similar to water, for a period of time sufficient to substantially completely disperse the graphite particles in the water or solvent. A binding or film forming polymer is then added to the graphite slurry, said polymer being soluble in the water or solvent. The resulting slurry is then subjected to a freeze drying step so that the water or solvent present is caused to sublime resulting in the formation of polymeric coated graphite particles of at least 0.2 microns in diameter. These particles can be incorporated into the support layer of a electroconductive transfer film.

Abstract: Catalytic particles with an inert, corrosion resistant support material are provided with a catalyst finely dispersed in a matrix of an insoluble electrically conducting polymer formed in situ on each particle of inert support material.The inert support particles are catalytically activated by:(a) wetting them with a solution containing an inorganic precursor compound for the catalyst and an organic precursor compound for the insoluble polymer matrix,(b) drying the particles, and(c) heat treating them to convert the precursors to the catalyst dispersed in the polymer matrix.An electrode, e.g. an oxygen-evolving anode, is produced by either fixing the catalytic particles to an electrode base, e.g. lead, or by consolidating the catalytic particles into a porous electrode body.