Abstract: A mass of ferromagnetic particles moldable into stable, high strength, magnetic cores useful in thermally and chemically hostile environments comprising an iron core and a continuous layer of polyetherimide, polyethersulfone or polyamideimide spray coated onto the surface of each particle. A method of preheating and molding the particles is disclosed.

Abstract: There is provided a method of preparing a natural fibrous material particle composition such as a wood chip composition for use in forming a particle board which includes the steps of impregnating from 50 to 95% by weight of the composition of the particles with a compound selected from coal tar, pitch, asphalt and bitumen dissolved in a solvent therefor such as dichloromethane, applying from 2.5 to 25% by weight of the composition of a novolac resin including a cross-linking agent, in finely divided powder form, to the impregnated particles so that the resin adheres to the impregnated particles, and recovering the solvent. This composition may be used to manufacture a particle board in a platen press by coating the platens of the platen press with a layer of the novolac resin, and then placing the composition between the platnes and subjecting the composition to suitable conditions of temperature and pressure to cause the novolac resin to cross-link to form the board.

Abstract: An encapsulated breaker chemical composition used in a fracturing process in an oil or gas stimulation operation which comprises: (a) a breaker chemical; (b) a water soluble sealing layer, such as urea, having a thickness within the range of about 1 to about 30 microns deposited on the surface of said breaker chemical and encapsulating said breaker chemical; and (c) a pinhole free coating of a neutralized sulfonated elastomeric polymer of about 2 to about 80 microns thick deposited onto the surface of the coated breaker chemical, wherein said neutralized sulfonated polymer encapsulates the breaker chemical and is permeable to the breaker chemical.

Abstract: The matrix is formed by particles of ceramic material which are introduced into the empty spaces of a fibrous structure and are bonded to one another by bridges of ceramic material obtained by in situ pyrolysis of a liquid polymer.By means of this process, a composite material of low porosity, despite a high reduction in volume during pyrolysis, is obtained relatively rapidly.

Abstract: An enteric film is produced by spraying on a material a mixed solution of (a) hydroxypropylmethylcellulose phthalate exhibiting a viscosity of about 136 to 204 centistokes as 10% methanol/dichloromethane (1:1 by weight) solution at 20.degree. C., (b) polyethylene glycol presenting solid state at ambient temperature and (c) shellac, wherein respective ratios of (b) and (c) to (a) are 0.1 to 20 weight percent and 5 to 40 weight percent; and then drying the solution.The enteric film excels in film strength and acid resistance, and can be employed in pharmaceutical preparations.

Abstract: An encapsulated breaker chemical composition used in a fracturing process in the protection of an oil or gas stimulation operation which comprises: a breaker chemical; and a pinhole free coating of a neutralized sulfonated elastomeric polymer of about 2 to about 80 microns thick deposited onto the surface of the breaker chemical, wherein said neutralized sulfonated polymer encapsulates the breaker chemical, wherein the neutralized sulfonated polymer is permeable to the breaker chemical and the neutralized sulfonated polymer is non-reactive to the breaker chemical.

Abstract: Thers is disclosed a novel colloidal metal dispersion in which colloidal particles of a metal are protected by specific polymers including hydrazide polymers, acrylic ester polymers and acrylamide polymers. The colloidal metal dispersion is highly stable, and the colloidal metal particles protected by such specific polymers can be easily and strongly bound to various amino group-containing compounds to give stable colloidal metal complexes, which have a wide variety of uses, such as the use as a solid catalyst, the use for the treatment and diagnosis of various diseases, the use for studying tissues of living bodies, the use for inducing mutation of microorganisms, etc.

Abstract: An encapsulated breaker chemical composition used in an oil or gas stimulation operation which comprises: a breaker chemical; and a pinhole free coating of an ionically and covalently crosslinked neutralized sulfonated elastomeric polymer of about 2 to about 80 microns thick deposited onto the surface of the breaker chemical, wherein said polymer encapsulates the breaker chemical, wherein the polymer is permeable to the breaker chemical and the polymer is non-reactive to the breaker chemical.

Abstract: A metal fuel for producing power for propulsion is disclosed. The fuel is made up of a metal core, a metal barrier and an oxidizer layer. The combination of materials disclosed provides a means for melting the metal core so that it can be oxidized in an exothermic reaction to produce power. The metal fuel may also be stabilized with respect to auto-ignition by adding a binder layer. A method for producing the metal fuel is also described herein.

Abstract: In a two-component system for a hardenable material, quartz grains (1) serve as a filler material and are coated with benzoyl peroxide which forms the hardener component of the system. The benzoyl-peroxide coated quartz grains are enclosed in a protective layer of pyrogenic silicic acid. As a result, the flotation capability of the quartz granules is maintained.

Abstract: A method of encapsulating a toxic material with a resinous plastic wherein the toxic material is admixed and coated with the resinous plastic to result in an encapsulated product having a protective skin thereover. The method involves an extrusion step followed by a severing of the extruded product into discrete particles for either subsequent injection or compression molding or additional extruding with additional resinous plastic. Geometric forms result which can indicate the type of toxic material as well as be of a size so as not to be ingested by animals and have imprinted warning indicia. Liquid as well as solid toxic materials can be encapsulated.

Abstract: A dosage form is disclosed comprising a coat that surrounds a drug. The coat comprises a subcoat and an overcoat thermally annealed to provide a single unit coat around the drug.

Abstract: Metal oxide coated mica pigments are provided with enhanced light and moisture stability by providing on the particle surfaces of coating of hydrous aluminum oxide.

Abstract: Acrylic coating compositions containing silver metallic flake pigments are disclosed. The coatings are particularly adapted for use in automotive top coat systems as the base coat of a pigmented base coat/clear top coat coating system. The coating compositions have a hydroxyl content of less than about 8.0 wt. %. The resulting coating compositions when dried or cured to hard durable films do not exhibit discoloration associated with silver flake coatings.

Abstract: An improved X-ray intensifying screen comprising phosphor crystals having an effective amount of a light scattering particulate material, e.g., barium sulfate, strontium sulfate, calcium sulfate, titanium dioxide or magnesium oxide, adhered thereto is described. This screen will give high speed and yield an image with increased sharpness when exposed with a single-side coated medical X-ray film element, compared to one made without the particulate material.

Abstract: A heat-resistant, water-resistant, low-viscosity magnetic fluid and a process for producing same has a dispersion medium made of a low-volatile organic solvent, a low molecular weight dispersant having a lipophilic group and a polar group, the lipophilic group having an affinity for the organic solvent, ferromagnetic particles dispersed in the organic solvent, the surface of each of the ferromagnetic particles being covered with the dispersant, and an additive added to the dispersion medium having a lipophilic group and a polar group, the lipophilic group having a macromolecular chain. The process includes a step of adding the additive to the dispersion medium. The lipophilic group includes a macromolecular chain. The magnetic fluid is suitable for service, e.g., in a shaft seal.

Abstract: The present invention relates to a novel desiccant powder and its use for the drying of solid substrates wetted by an aqueous or oily liquid such as, in particular, grains or seeds having undergone a coating or surface film-forming treatment.According to the invention, this desiccant powder contains at least 50% by weight of absorbents with respect to the toal weight of the said powder, being preferably available in the form of particles having a mean diameter less than about 100.mu., the said absorbents being constituted of at least one aluminosilicate, in particular mica, to at least 25% by weight with respect to the total weight of the said absorbents.This powder makes possible, in particular, the drying of colored grains or seeds.

Abstract: A process for preparing hydrophobic material is disclosed which comprises applying a hydrocarbon polymer compound solution to the surface of material to be treated, vaporizing the solvent of the solution, and then fluorinating the polymer compound to coat the surface of the material to be treated with the fluorinated polymer compound.

Abstract: A biologically degradable film is prepared consisting of a synthetic polymer and a biologically degradable polymer. The biologically degradable polymer is divided into small particles in an aqueous suspension by means of enzymes that split and release small molecules from the surface of the biopolymer particles. After achieving desired particle size, an emulsion is formed with vegetable oil and the particles coated with enzyme protein become coated with vegetable oil, which at the same time interrupts the degradation of the biopolymer particles by the enzyme. The coated particles with the oil are separated from the suspension to remove small molecules after which the particles are re-dried and then pulverized. The final film is prepared in a film extruder in which the biopolymer is mixed with the synthetic polymer and possibly other additives that are generally used informing polymer films.

Abstract: A method for substantially improving the bulk flow properties of pesticide-treated plant seeds is disclosed. The seeds are treated with low levels of a polydimethylsiloxane lubricant which is applied either to seeds that have already been treated with a pesticidal substance or to seeds simultaneously with a pesticidal substance. The polydimethylsiloxane lubricant can be applied either by coapplication from separate compositions or by the application of a composition containing both the pesticidal substance and the polydimethylsiloxane lubricant.

Abstract: The invention provides a method of preparing coated seeds, which comprises slurrying seeds with an inoculant composition containing a carrier medium, at least one species of microorganism having a beneficial effect on plants which grow from the seeds and an adhesive polymer, slurrying being effected in the presence of an aqueous suspension of an adhesive polymer; and air drying the resulting product at a temperature not greater than 30.degree. C.

Abstract: A process for producing refractory, carbon-bonded ceramic moldings includes spraying a low-viscosity organic containing carbon containing binder onto a coarse fraction of a refractory component, the coarse fraction having a particle size larger then 0.5 mm while maintaining the coarse refractory fraction having a particle size smaller then 0.5 mm onto the coated granules, pressing the granules thus produced into moldings, and subsequently curing the organic binder in the moldings, and tempering or firing the moldings.

Abstract: The present invention relates to a corrosionproof coating material characterized by including a triazine derivative possessing a thiol group, and accordingly being effective for coating an extremely air oxidizable metallic material and processed articles thereof, such as a rare earth-iron-boron type permanent magnet, that are easily oxidizable in the air.

Abstract: This invention provides a novel process of producing magnetically responsive polymer particles comprising polymeric core particles coated evenly with a layer of polymer containing magnetically responsive metal oxide. A wide variety of polymeric particles with sizes ranging from 1 to 100 microns can be used a core particles and transformed into magnetically responsive polymer particles. The surface of these magnetically responsive polymer particles can be coated further with another layer of functionalized polymer. These magnetically responsive polymer particles can be used for passive or covalent coupling of biological material such as antigens, antibodies, enzymes of DNA/RNA hybridization and used as solid phase for various types of immunoassays, DNA/RNA hybridization probes assays, affinity purification, cell separation and other medical, diagnostic, and industrial applications.

Abstract: An electroconductive powder composition of antimony-containing tin oxide with an outer layer of hydrous metal oxide having an isoelectric point in the range from about 5 to 9.

Abstract: Curable compositions comprising blends of active hydrogen-containing polymers and curing agents therefor are disclosed. The blends comprise 5 to 60 percent by weight of a free radical initiated addition polymer prepared from a mixture of monomers comprising:1) an epoxy monomer represented by the formula: ##STR1## where R stands for tertiary aliphatic hydrocarbon group having 4 to 26 carbon atoms,2) a polymerizable alpha, beta-ethylenically unsaturated carboxylic acid, and3) optionally at least one other polymerizable alpha, beta-ethylenically unsaturated monomer.Also present in the blend is 10 to 50 percent by weight of an acrylic copolymer different than the addition polymer mentioned above prepared from a mixture of monomers comprising:1) a monomer of the formula: ##STR2## where R.sub.2 is a polymerizable unsaturated hydrocarbon group, R.sub.3 is hydrogen or C.sub.1 to C.sub.4 alkyl, n=2 to 4 and2) at least one other unsaturated monomer copolymerizable therewith.

Abstract: Methods of doubly coating iron particles. The methods comprise treating the iron particles with phosphoric acid to form a layer of hydrated iron phosphate at the surfaces of the iron particles. The particles are heated in an inert atmosphere at a temperature and for a time sufficient to convert the hydrated layer to an iron phosphate layer. The particles are then coated with a termoplastic material to provide a coating of thermoplastic material substantially uniformly circumferentially surrounding the iron phosphate layer. Doubly-coated iron particles provided in accordance with this invention are generally useful for forming magnetic components and cores for use in high frequency switching applications.

Abstract: This invention provides an improved method for coating reinforcing agents at are used in fiber reinforced ceramic composites and other composite materials. In the first step of this method the reinforcing agent is surface cleaned. The cleaned reinforcing agent is then dipped into a solution of a surfactant and uniformly coated therewith, whereby a positive charge is imparted to the agent. The charged agent is then dipped into a suspension of the coating material, such as alumina powder. The suspension of the coating material is prepared by dispersing the particles using ultrasonification and a dispersant, such as polyacrylate. The pH of the suspension is adjusted so that the dispersant is ionized and can adsorb on the particulate coating material. After dipping the reinforcing agent into the suspension, the reinforcing agent is dried. The steps of the method, except for the cleaning step, are repeated until a coating having a desired thickness is formed.

Abstract: A two-part system and method for increasing the reflex-reflectivity of a substrate is disclosed wherein a first aerosol dispensing means containing a first coating composition capable of forming a base coating on a substrate and a second aerosol dispensing means containing a second coating composition capable of imparting reflex-reflectivity to the base coating is employed. The first coating composition comprises a binder resin and a solvent in which the binder resin is dissolved and the second coating composition contains transparent microspheres having a particle size from about 45 to about 90 microns and a carrier in which the transparent microspheres are dispersible. The substrate is coated first with the first coating composition via aerosol means to form a base coating which is subsequently coated with the second coating to impart reflex-reflectivity to the base coating.

Abstract: A method of producing submicron nonagglomerated particles in a single stage reactor includes introducing a reactant or mixture of reactants at one end while varying the temperature along the reactor to initiate reactions at a low rate. As homogeneously small numbers of seed particles generated in the initial section of the reactor progress through the reactor, the reaction is gradually accelerated through programmed increases in temperature along the length of the reactor to promote particle growth by chemical vapor deposition while minimizing agglomerate formation by maintaining a sufficiently low number concentration of particles in the reactor such that coagulation is inhibited within the residence time of particles in the reactor. The maximum temperature and minimum residence time is defined by a combination of temperature and residence time that is necessary to bring the reaction to completion.

Abstract: The present invention is directed to processes and apparatus useful for fluidizing small particulate solids having a diameter of less than about 50 microns in average particle size, and at least partially enveloping these small solids with a coating material or a precursor thereto.

Abstract: Perfume particles are disclosed comprising perfume dispersed within certain water-insoluble polymeric carrier materials. Cleaning and conditioning compositions comprising these perfume particles are also disclosed. The perfume particles allow for preservation and protection of perfumes which are susceptible to degradation or loss in storage and in harsh cleaning conditions. The particles further allow for efficient delivery of a large variety of perfume types to fabrics or other surfaces.

Abstract: Precursor suitable for conversion into silicon carbide product containing a substantial amount of silicon carbide whiskers is preferably prepared by impregnating activated carbon particles (through 100 mesh) with silicon tetrachloride dissolved in methylene chloride, then impregnating the particles with aqueous solution of transition metal salt, preferably Ni(NO.sub.3).sub.2 .multidot.6H.sub.2 O, reacting at room temperature to give carbon, hydrated silica, Ni.sup.+30 and HC1, reacting with NaOH to convert HC1 to NaCl and water and drying to remove methylene chloride and water. Molar ratios of carbon to silicon tetrachloride range from 5:1 to 10:1, of transition metal salt to silicon tetrachloride range from 1:50 to 1:200, of water to silicon tetrachloride range from 0.25:1 to 2:1, and of NaOH to silicon tetrachloride range from 0.8:1 to 2.0:1.

Abstract: A composition capable of releasing active enzyme into an aqueous, active chlorine containing media which in a first aspect comprises an enzyme core encapsulated with an initial coating of a time-release substance, a first coating of a bleach-neutralizing substance and a second coating of a time-release substance.In a second aspect, the composition comprises an enzyme encapsulated in a time-release substance designed to delay release of the enzyme in dissolution for a first-time delay, and a bleach-neutralizing substance, present as either a core material and/or a first coating on a diluent core, which is encapsulated in a time-release substance designed to delay release of the bleach-neutralizing substance into solution for a second-time delay; the first-time delay being longer than the second-time delay so that the bleach-neutralizing substance will be released and completely neutralize all active chlorine present in the solution before the enzyme is released.

Abstract: A method of fabricating an electrode which comprises an intimate mixture of finely divided electroactive material in a matrix composed of a conjugated backbone polymer which comprises the steps of: derivatizing the surface of finely divided alkali-metal alloying metal, alkali metal cation inserting material or anion inserting material with active polymer catalyst; dispersing the derivatized metal or material having a desired small particle size in a gas, suspension or solution of a monomer or other precursor of the desired conjugated backbone polymer and polymerizing the monomer and/or precursor in the presence of the dispersed metal or material; and fabricating a cohesive solid by recovering the polymerization product from said gas, suspension or solution comprising derivatized metal or material coated with conjugated backbone polymer and forming same into a cohesive solid.

Abstract: An electroluminescent device comprises a luminous layer containing electroluminescent particles each covered with a moisture-proof film, which is formed by polymer, having network structure obtained by hydrolyzing metal alkoxide and causing polycondensation reaction. The moisture-proof film may contain pigment, or a film containing pigment may be formed to cover the electroluminescent particle.

Abstract: The invention relates to a process for preparing highly dispersed metal oxides whose surfaces are modified by an ammonium-functional organopolysiloxane as a charge controlling substance for positive chargeable toners, in which the highly dispersed metal oxides are reacted with an organopolysiloxane which contains silicon-bonded terminal hydroxyl and/or alkoxy groups, diorganosiloxane units, in which the two organic radicals are monovalent hydrocarbon radicals, and siloxane units in which the organic radicals contain a positive charged nitrogen which is bonded to silicon via carbon.

Abstract: A process for producing a product of carbon fiber reinforced thermoplastic resin comprising immersing carbon fibers in a suspension of a powder of a thermoplastic resin in a liquid medium, which contains at least 20 wt % of an organic liquid and which contains from 0 to 80 wt % water, to impregnate the thermoplastic resin among carbon fibers, and heating the thermoplastic resin deposited on the fibers to melt and form a unitary assembly with carbon fibers.

Abstract: The surfaces of particulate adsorbents are consolidated by a process in which the adsorbent is impregnated with a cationic aqueous polymer solution and then treated with an anionic aqueous dispersion of a polymer having a softening point of from 60.degree. to 150.degree. C. and the materials are dried together.

Abstract: There is disclosed a novel colloidal metal dispersion in which colloidal particles of a metal are protected by specific polymers including hydrazide polymers, acrylic ester polymers and acrylamide polymers. The colloidal metal dispersion is highly stable, and the colloidal metal particles protected by such specific polymers can be easily and strongly bound to various amino group-containing compounds to give stable colloidal metal complexes, which have a wide variety of uses, such as the use as a solid catalyst, the use for the treatment and diagnosis of various diseases, the use for studying tissues of living bodies, the use for including mutation of microorganisms, etc.

Abstract: A sialon ceramic material comprising a ceramic core selected from alpha-prime-sialon, beta-prime-sialon, and an intergranular phase and, optionally substantially substantially inert refractory phases. The sialon ceramic material has an alloyed surface layer with a substantially increased aluminum and oxygen content.

Abstract: A nitride ceramic member is maintained at a vacuum of 1.times.10.sup.-4 Torr or less at a temperature of 1,000.degree. C. or more, and a metal vapor is brought into contact with the surface of the nitride ceramic member. A nitride is reacted with the metal in the surface portion of the ceramic member, and a metallized layer is formed on the surface of the member. If AlN is used as a nitride ceramic material, the AlN member is maintained at the vacuum at the high temperature and a Ti vapor is brought into contact wit the surface of the AlN member to form a TiN coating layer on the surface of the AlN member. A BN or graphite mask is formed on the surface of the nitride ceramic member and the above method is practiced to selectively form a metallized layer on the non-masked member surface. By selectively forming a metallized layer by using AlN, a highly thermal-conductivity substrate having a conductive layer formed on the AlN base can be prepared.

Abstract: A substantially water-resistant resin-coated aggregate for use in concrete includes a porous aggregate body, such as an artificial light weight aggregate, with an elastic layer made of a phenol resin elastomer deposited on the aggregate body, a rigid phenol resin coated on the elastic covered aggregate body. This resin-coated aggregate has a high water absorption prevention and further an external stress-damping function.

Abstract: Magnetic polymer particles are formed by swelling porous, polymer particles and impregnating the particles with an aqueous solution of precursor magnetic metal salt such as an equimolar mixture of ferrous chloride and ferric chloride. On addition of a basic reagent such as dilute sodium hydroxide, the metal salts are converted to crystals of magnetite which are uniformly contained througout the pores of the polymer particle. The magnetite content can be increased and neutral buoyancy achieved by repetition of the impregnaton and neutralization steps to adjust the magnetite content to a desired level.

Abstract: Ceramic particulate useful as a proppant in hydraulic fracturing and in gravel packing operations is provided which comprises a ceramic (sometimes vitreous) core surrounded by an epoxy resin coating. Novolac epoxy resin compounds without any substantial acid soluble filler are used to coat ceramic particulates similar to those disclosed in U.S. Pat. Nos. 4,680,230 and 4,632,876. The result is a product which combines the excellent solvent resistance of the ceramics with the acid resistance of the resin. The resin coating gives the added benefits of lower specific gravity and improved crush resistance.

Abstract: By coating the surface of granular harmful aromatic diamine with an organic coating agent consisting of aromatic diamine having no variant-causing property, at least one member selected from glycols and a syntehtic resin having solubility parameter of 9.0 or higher, the aromatic diamine which is regarded as harmful can be handled safely without damaging its essential property as a hardening agent.

Abstract: Delayed-release hypohalite bleach compositions are provided which include encapsulates having a granular, hypohalite-releasing core and a coating delaying release of hypohalite ion and scavenging hypohalite ion when the encapsulates are exposed to an aqueous solution. The coating must include an amine compound with limited solubility in water. The core preferably includes a dihalodialkyl hydantoin and the coating an amine having a saturated hydrocarbon carbon of about 6 to about 24 carbon atoms.

Abstract: The stabilization of zirconia when used as a ceramic by various stabilizers has been known but a new and improved stabilized particulate zirconia has now been developed showing the important advantages.The particulate zirconia now developed is coated with a hydrous oxide of titanium and/or of aluminium and with at least one hydrous oxide of yttrium, calcium, magnesium, strontium or cerium.

Abstract: An improved method for the production of a plasticizer-containing dry flowable polyvinyl alcohol (PVA) resin blend capable of thermoplastic processing. The method provides for the incorporation of plasticizers in intimate contact with the PVA resin without heating, cooling, or extended drying steps. Specifically, PVA resin granules having an appropriately small particle size distribution are spray-coated with a liquid plasticizer medium, and then mixed with a dry, fine powder coating medium to produce a flowable, dry plasticized PVA blend. Additional components, such as antioxidants, dyes, and antiblocking agents, may also be incorporated into the finished product.

Abstract: A process for producing a surface treated pigment wherein pigment particles are dispersed in a solution of a water soluble high polymer having radical generation sites to adsorb the water soluble high polymer on the surfaces of the pigment particles, adding a vinyl monomer to the resulting aqueous liquid dispersion of the pigment particles subjected to the adsorption treatment and polymerizing in the presence of a polymerization initiator, if desired, to form a polymer layer on the surfaces of the pigment particles. Formation of the white polymer particles composed only of polymer can be prevented and dispersion stability can be improved.