Abstract: Multi-layered macromolecules wherein the layers are covalently bonded together and wherein the macromolecules are covalently bonded to solid particulate substrates, methods for the preparation of such compositions, and methods for their uses in a multitude of end use applications ranging from the purification of waste chemical and metal process streams to the separation and identification of proteins, peptides, and oligionucleotides.

Abstract: The invention concerns a product based on calcium oxide in the form of rough grains, comprising a protective film coating the grains, based on at least a film-forming compound, which is solid at room temperature and which, when applied on the grains, is in solution or in emulsion in a vaporable aqueous phase. The invention also concerns a method for making said product.

Abstract: A coated triggered start product is formed from a particulate core material comprising at least one water soluble active constituent and at least one coating layer applied on the particulate core material. The coating layer causes the product to exhibit “lock-off” type release characteristics whereby release of the active constituent of the core material from the coated product is essentially completely suppressed until release is initiated by application of a trigger material to the coating layer. Processes for preparing and using such triggered start products are also provided.

Abstract: The invention provides electroconductive particles comprising a styrene copolymer core and an external gold coating, characterised in that as said copolymer core is used a styrene copolymer comprising less than 50 wt. % styrene residues.

Abstract: This invention concerns intercalation compounds and in particular lithium intercalation compounds which have improved properties for use in batteries. Compositions of the invention include particulate metal oxide material having particles of multicomponent metal oxide, each including an oxide core of at least first and second metals in a first ratio, and each including a surface coating of metal oxide or hydroxide that does not include the first and second metals in the first ratio formed by segregation of at least one of the first and second metals from the core. The core may preferably comprise LixMyNzO2 wherein M and N are metal atom or main group elements, x, y and z are numbers from about 0 to about 1 and y and z are such that a formal charge on MyNz portion of the compound is (4−x), and having a charging voltage of at least about 2.5V.

Abstract: A process for preparing phosphor particles of a host oxide doped with a rare earth or manganese which comprises: preparing an aqueous solution of salts of the host ion and of the dopant ion and a water soluble compound which decomposes under the reaction conditions to convert said salts into hydroxycarbonate, heating the solution so as to cause said compound to decompose, recovering the resulting precipitate and calcining it at a temperature of at least 500° C. Substantially monocrystalline particles can be obtained by this process.

Abstract: The thermoplastic composition according to the invention for shaped light-scattering articles, based on a transparent thermoplastic formed from (meth)acrylic (co)polymer and on light-scattering particles, comprises polytetrafluoroethylene (PTFE) particles or a mixture of PTFE particles and particles of a mineral and/or organic substance, these light-scattering particles having a mean size of 0.5 &mgr;m to 200 &mgr;m and a refractive index which differs from that of the transparent thermoplastic by at least ±0.05 and being used in an amount, with respect to the total composition, of 5 ppm to 2000 ppm by weight. Application to light display devices and to flat light screens comprising a sheet obtained from the composition.

Abstract: A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, a magnetic layer formed on the primer layer, and a backcoat layer formed on the other surface of the non-magnetic support, wherein the magnetic layer has a thickness of 0.30 &mgr;m or less and a centerline average surface roughness Ra of 3.2 nm or less, and (P1−P0) is 30 nm or less and (P1−P20) is 5 nm or less in which P0 is an averaged height of projections of the magnetic layer, and P1, P2, - - - and P20 are heights of the highest, the second highest, - - - and the 20th highest projections of the magnetic layer, respectively.

Abstract: Microspheres are constructed using magnetic particles. Hybrid microspheres are constructed using fluorescent or luminescent microspheres and magnetic nanoparticles. Reactive moieties on the surface of the resultant particles can be used for attachment of biologically active molecules, thus allowing selective separations and analytical assays to be performed. Distinguishable subsets of microspheres can be constructed based on fluorescent intensities, and separations can be affected based on variable degree of magnetic content.

Abstract: By utilizing the sequential synthesis afforded reverse micelles, nanocomposite materials can be synthesized which have a diamagnetic core surrounded by a thin shell of ferromagnetic material passivated with a second shell of a diamagnet. Using gold as the diamagnetic material and iron as the ferromagnetic material, nanocomposites can be synthesized where there is a thin layer of the magnetic material, which is passivated and protected from oxidation. In this case, all of the spins of the magnetic layer lie within the surface of the particle.

Abstract: This invention concerns cationic core-shell particles having a polymeric core component and a polymeric shell component disposed generally about said core, wherein said shell contains a stabilizer that is covalently bonded to the polymeric shell component. More particularly, the invention concerns the use of these core-shell particles in formulating ink jet receptive coatings.

Abstract: A magnetic tape includes: a back coating layer containing a carbon black; a support; a non-magnetic layer containing a non-magnetic powder and a binder, which is substantially non-magnetic; and a magnetic layer containing a ferromagnetic powder and a binder, in this order, wherein the magnetic tape is a magnetic tape for recording a signal with a 10 to 100 Mbit/cm2 surface recording density; the magnetic tape has a temperature expansion coefficient in a width direction thereof of a 0.0015%/° C. or less, a humidity expansion coefficient of 0.0015%/% RH or less, an offset yield strength in a longitudinal direction thereof of 10N or more, a rupture strength of 30 N or more; and the support has a center plane average roughness on a coating surface side of the magnetic layer of 1.0 nm or less, a center plane average roughness on a coating surface side of the back coating layer of 3.0 to 9.

Abstract: A magnetic recording medium includes: a non-magnetic support; a lower non-magnetic layer; and a magnetic layer containing a ferromagnetic powder and a binder, in this order, wherein the magnetic layer has a coercive force of 2,500 to 3,500 oersted (197.5 to 276.5 kA/m), and a squareness ratio of 0.70 to 0.85 in a length direction thereof, and the binder in the magnetic layer is a urethane resin having a glass transition temperature Tg of 70° C. or higher.

Abstract: The invention relates to particles with opalescent effect—especially 3-D structural color pigments-based on solid colloidal crystals of monodispersed spheres and the manufacturing processes suitable for large-scale production of such solid colloidal crystal products. The particles with opalescent effect contain a sphere based crystal structure (or super-lattice) built up by monodisperse spheres and one or more secondary types of much smaller colloidal particles occupying partially or completely the empty spaces between the monodisperse spheres.

Abstract: Three dimensional inorganic powder substrates, with shielded surfaces, having metal oxyanion containing coatings are disclosed. The coated substrates are produced by the process comprising reacting powder particle substrates with a metal oxyanion precursor, an anion forming precursor and an oxy precursor reactant mixture at fast reaction and elevated temperature reaction conditions to form a substrate containing a metal oxyanion coating on at least a portion of the three dimensions and shielded surfaces of the substrate. The coated substrates are useful in polymers, catalysis, heat dissipation and shielding applications.

Abstract: Spindle-shaped magnetic alloy particles containing Fe and Co as main components of the present invention have a cobalt content of 20 to 50 atm % (calculated as Co) based on whole Fe; an average major axis diameter (L) of 0.03 to 0.10 &mgr;m; a coercive force value of 159.2 to 238.7 kA/m (2,000 to 3,000 Oe); a crystallite size of 100 to 160 Å; and an activation volume (Vact) of 0.01 to 0.07E-4 &mgr;m3. A high-density magnetic recording medium produced by using such spindle-shaped magnetic alloy particles containing Fe and Co as main components, have an excellent output characteristics in a short wavelength region, a considerably reduced noise and an excellent storage stability.

Abstract: Diffractive pigment flakes include single layer or multiple layer flakes that have a diffractive structure formed on a surface thereof. The multiple layer flakes can have a symmetrical stacked coating structure on opposing sides of a reflective core layer, or can be formed with encapsulating coatings around the reflective core layer. The diffractive pigment flakes can be interspersed into liquid media such as paints or inks to produce diffractive compositions for subsequent application to a variety of objects. The diffractive pigment flakes can be formed with a variety of diffractive structures thereon to produce selected optical effects.

Abstract: Production of hollow carbon fibers and hollow carbon particles includes baking and carbonization of polymer particles having a specified volume after deformation. A metal-deposited carbon fiber with metal deposited inside and/or outside the hollow carbon fiber is applicable to electron discharge devices. The thickness and crystallinity of the graphite layer can be freely controlled. Since almost no by-product is generated, separation and refining using a solvent is not required. A hollow carbon particle of desired shape can be produced at a high yield rate. The hollow carbon fiber represented by a carbon nano-tube can be controlled in such a way that a low resistance and uniform shape are provided so that there is an increase in the amount of electrons discharged from the hollow carbon fiber. Use of this hollow carbon fiber as an electron discharge source provides an excellent electron discharge device characterized by stable pixels.

Abstract: A method is provided for coating one or more fluid layers on a substrate to form magnetic recording media such as magnetic tape and diskettes. The method takes advantage of fluid coating formulations having a particular rheology that enables the coating of one or more magnetic layers with reduced thicknesses while achieving increased coating speeds. With proper rheology, one or more layers can be coated on a substrate traveling at increased speeds while maintaining desired coating thicknesses.

Abstract: The invention discloses a method for the preparation of a rare earth hydroxide powder in which, different from the conventional wet-process hydroxide precipitation method in an aqueous solution of a rare earth salt by the addition of an alkali, a powder of a rare earth oxide is brought into contact with a limited amount of water in the form of either liquid or vapor and kept in contact with water at a temperature of 30 to 200° C. The thus prepared rare earth hydroxide powder is characterized by a small crystallite diameter not exceeding 40 nm and outstandingly low contents of impurity chlorine and nitrate ions originating in the starting rare earth salt in the hydroxide prepared by the conventional wet-process method.