Abstract: A super high density magnetic recording medium is provided, which comprises a polyester film and a discontinuous film formed on at least one surface of the polyester film. The discontinuous film has a thickness of smaller than 500 angstroms and is composed mainly of a water-soluble polymer, a silane coupling agent, and if desired, a silicone resin. A high density magnetic recording medium is also provided, which comprises a ferromagnetic metal thin film formed on the discontinuous film layer of the polyester base film. The polyester base film is especially suitable for formation of a metallized video tape, and this tape is excellent in the slip characteristics and abrasion resistance and advantageous in that noises and drop-out are reduced.

Abstract: A dirt resistant silicone coating composition comprising:(1) a base vinyl chainstopped polysiloxane,(2) a resinous organopolysiloxane copolymer,(3) a platinum catalyst and,(4) a liquid organohydrogenpolysiloxane crosslinking agent.

Abstract: The invention concerns a composite article for making coverings, which comprises, in a stratified structure, a self-protecting outer membrane associated at its lower surface with an insulating layer which, in turn, is associated at its lower surface with a waterproofing and self-adhesive layer. The outer self-protecting membrane comprises a bituminous support and is covered on the outside by a protective layer. By means of the article according to the invention, a decorative covering, which comprises a vapor barrier, a thermal insulation, and a waterproof protective layer, is built in a single application phase at room temperature and without the use of adhesives.

Abstract: A composition is disclosed, which when applied to the surface of a paper product, such as a corrugated board, improves the slip-angle. The composition, consisting of an aqueous suspension of colloidal silica and urea, finds particular utility in products resulting from recycled paper.

Abstract: Roofing granules coated with insolubilized reaction product of a coating composition comprising water, kaolin clay, sodium silicate, pigment, and gas forming compound such as hydrogen peroxide or sodium perborate.

Abstract: Disclosed is a coating composition rapidly curable at room temperature in presence of a vaporous tertiary amine catalyst and possessing a flexibility sufficient for a zero-T bend on metal and a mar resistance of at least about 2,000 grams as borne by the edge of a nickel passed on said film. The coating composition is a phenolic-terminated-polyester and multi-isocyanate curing agent (at least about 10% aromatic isocyanate content) dispersed in a fugitive organic solvent, and a mar-resisting aid of an organic compound physically incompatible in said coating composition and having an effective chain length of at least about 12 carbon atoms. Application of the coating composition preferably is on a flexible substrate such as a thermoplastic substrate.

Abstract: Roofing granules coated with insolubilized reaction product of a coating composition comprising water, kaolin clay, sodium silicate, titanium dioxide and ammonium nitrate or nitrate of one or more group 1A metals.

Abstract: A process for simultaneously cementing diamond fines together and bonding the cemented diamonds to a silicon-silicon carbide composite is described. During the process the silicon-silicon-carbide composite furnishes silicon for the cementing and bonding function and the silicon-silicon carbide composite provides for the structural stability of the resulting article. The process comprises placing a quantity of diamond powder and a mass of silicon-silicon carbide composite adjacent to each other, packing such material to form a stabilized geometry, heating the stabilized geometry in an inert atmosphere, and simultaneously applying pressure thereto.

Abstract: A friction surface sheet material which may be adherently bonded to the patterned surface of a substrate which permits the visual observation of such pattern when attached. The friction surface sheet material comprises a backing layer formed of a dimensionally stable polymeric film such as polyethylene terephthalate. A first and second coating of the first and second transparent binder material adherently bond a multitude of minute transparent glass particles uniformly dispersed over the upper major surface of the backing layer, with the tops of the glass particles projecting above the binder coating to provide a friction surface, and the bottom major surface of the backing layer has thereon a layer of transparent pressure-sensitive adhesive. The glass particles may be glass spheres or fragments obtained by fracturing larger particles of glass.

Abstract: An iron oxide pigment having a coating of a silane of the formulaR.sub.n Si(OR').sub.4-nwhereinR is an, in some cases, branched or oxygen-bridge-containing alkyl or alkenyl moiety of 1 to 18 carbon atoms, or an aryl moiety,R' is an, in some cases, branched and, in some cases, oxygen-bridge-containing alkyl moiety of 1 to 8,n=1 to 3,or a hydrolysis product thereof; a magnetic tape containing such coated iron oxide pigment and a process for coating such iron oxide pigment. There is particularly disclosed the treatment of iron oxide magnetic pigments to thereby improve their wear resistance and dispersibility in organic mediums.

Abstract: Structures for supporting printing articles in spaced aggregates as mounds and towers, for use in pulsed electrical printers, and method for their production. The structures comprise a base sheet having a roughened or microcavernous surface to receive the printing particles. The base sheet may be formed of or coated with conductive material, and may comprise a magnetizable material useful in forming and retaining the aggregates.

Abstract: A slippery and smooth-surfaced polyester film, at least one surface of which is covered with worm-like nodules, useful as a base film for high recording density magnetic tape.

Abstract: This invention relates to an improvement in a drawing layer for a plastic film, in particular for a polyester film, said drawing layer being adherent to the film and comprising a cellulose ester crosslinked by a formaldehyde resin, and including a matt-finishing agent and/or a pigment, the improvement which comprises that the drawing layer additionally contains at least one copolymer containing maleic anhydride units.

Abstract: An iron oxide pigment having a coating of a silane of the formulaR.sub.n Si(OR').sub.4-nwhereinR is an, in some cases, branched or oxygen-bridge-containing alkyl or alkenyl moiety of 1 to 18 carbon atoms, or an aryl moiety,R' is an, in some cases, branched and, in some cases, oxygen-bridge-containing alkyl moiety of 1 to 8,N=1 to 3,Or a hydrolysis product thereof; a magnetic tape containing such coated iron oxide pigment and a process for coating such iron oxide pigment. There is particularly disclosed the treatment of iron oxide magnetic pigments to thereby improve their wear resistance and dispersibility in organic mediums.

Abstract: A tile, generally used for roofing purposes, made of metal or synthetic material, has two portions, one portion has a convex upper surface and another portion has a concave upper surface. These portions are integral with each other and do not overlap one another. The underfaces of these portions exhibit cavities thereat. The length of one of the portions is greater than the length of the other portion. When laid upon a roof area the ends of the tiles will be made to overlap a predetermined length of the tile to give the appearance of a roof formed with conventional spanish mission tiles. Adjacent or contiguous tiles are interlocked by means of a curled corner of the other portion of the tile.

Abstract: A non-woven fabric is produced by stretching the film with on one surface a regular pattern of raised areas such as spaced hexagonal bosses and on the other surface a plurality of parallel grooves. Stretching is carried out in the groove direction. Preferably the polymer is a mixture of incompatible polymers so that on stretching a fibrous structure is formed. The film can be produced by melt-embossing. The stretched non-woven fabric may be coated with various adhesives to provide a tape useful in a medical context.

Abstract: Metal algicides, such as zinc and copper, are sprayed in the form of droplets of molten metal onto the surface of roofing granules or onto the surface of asphalt roofing compositions in which said granules are embedded. The metal algicides solidify and adhere on the surface of said granules or compositions as relatively fine, randomly distributed, irregular shaped metal globules. During periods of rain or dew upon atmospheric exposure of roofing compositions thus flame treated, or incorporating therein roofing granules so treated, the oxidized globules become ionized so that metallic algicidal ions are slowly released therefrom and leached over the roofing surface, thus retarding the biological growth of algae and/or fungi over extended periods of time.