Abstract: Microcapsules are produced in-situ in a film or during the manufacturing process of a water-based coating composition from which the film is formed. A principal process involves the in-situ production of void-containing microcapsules in a film formed from a water-based coating. This principal process involves as a first step the preparation of a polymer composition which may be a homogeneous solution containing a water-immiscible organic polymer, a water-immiscible solvent for the polymer, and a water-immiscible lower volatility non-solvent which is miscible with the solvent; or an emulsion containing as the continuous phase a water-immiscible organic polymer dissolved in a water-immiscible solvent for the polymer and, as the discontinuous phase, droplets of a lower volatility non-solvent dispersed in the continuous phase. This polymer composition is then emulsified under agitation and in the presence of a surfactant into a water-based coating composition.

Abstract: Thermorecording sheet, thermorecording method and method of manufacture of a thermally responsive recording paper comprising a reversibly reduced cyclic polyketo compound, such as hydrindantin and an N,N' polythiodiamine having a sulfur chain length of at least two sulfur atoms.

Abstract: Aqueous coating composition comprising a dispersion of a resinous addition polymer of an alpha, beta-ethylenically unsaturated carboxylic acid compound and suspended particles of a resinous polymer of propylene. Coating methods and coated articles are also disclosed.

Abstract: Thermorecording sheet, thermorecording method and method of manufacture of a thermally responsive recording paper comprising a reversibly reduced cyclic polyketo compound such as hydrindantin and a thiuram compound having a sulfur chain linkage of at least two sulfur atoms.

Abstract: A method is provided for growing highly oriented compound thin films on a substrate by subjecting the substrate to the vapor of a first single element which can react with the surface at a temperature sufficiently high for the reaction to occur which forms a single atomic layer of the first single element on the surface and then subjecting the thus formed surface with a first single element atomic layer thereon to the vapor of a second single element which can react with the first single element at a temperature sufficiently high for the reaction to occur so that a single atomic layer of the second single element is formed on the surface bound to the first single element. This procedure can then be repeated alternately subjecting the surface to the vapors of the first single element then to the second single element, etc. until the compound film reaches a desired thickness.

Abstract: Method is disclosed for developing electrostatic latent images, utilizing a developer supply unit formed of a liquid repellent layer having a thickness in the range of 3.mu. to 400.mu. (preferably 5.mu. to 330.mu.), and a substrate, and having uniformly distributed pores disposed therethrough. A liquid developer is supplied to the back surface of this unit, and an exposing unit is disposed to form electrostatic latent images onto the front surface of the developer supply unit. As a result, the liquid developer applied to the back surface of the liquid repellent layer is distributed on the front surface by the action of the electric field established by the latent image.

Abstract: A boron nitride crucible, suitable for the vaporization of aluminum, having a multi-walled structure comprising an outer wall and a thinner inner wall weakly bonded to the thicker outer wall. Because of this structure, the crucible is considerably more flexible than conventional single-walled crucibles and exhibits substantially improved thermal cycling characteristics and longer life. The crucible is produced by depositing pyrolytic boron nitride upon a mandrel having the shape of the desired crucible at a temperature of from about 1850.degree. C. to about 2100.degree. C. until a first layer of boron nitride of suitable thickness has been produced, interrupting the deposition of boron nitride upon the mandrel and lowering the temperature to below 1750.degree. C., and then depositing additional boron nitride upon the mandrel at a temperature of from about 1850.degree. C. to about 2100.degree. C. to produce a second outer layer of boron nitride having a thickness greater than that of the inner layer.

Abstract: Aluminum-coated glass-ceramic cookware of improved performance and durability is provided by a process comprising selecting a glass-ceramic vessel of specified strength and expansion characteristics, preheating the surface of the vessel to a temperature in the range of about 120.degree.-600.degree. C., flame-spraying molten powdered aluminum metal onto the surface of the vessel, optionally heat-treating the thus-coated vessel to provide an aluminum metal coating of excellent adherence and good thermal conductivity thereon, providing the aluminum coating with a film of phosphoric acid and heating said aluminum coating and film to a temperature at least sufficient to decompose the phosphoric acid. A supplemental oxide film may also be applied to protect the aluminum metal coating.

Abstract: The edge of a ceiling tile adjacent the fissured or embossed face of the ceiling tile is provided with a powder coating. The ceiling tile is formed from a fibrous board which has an open pore structure, and powder is dusted on the edge of the ceiling tile and is mechanically held in the open pore structure of the ceiling tile. The powder coating covers the upper edge of the ceiling tile with a coating so as to eliminate the dark edge effect secured when two ceiling tiles are in position with their front planar surfaces not quite in the same plane.

Abstract: Process for flameproofing organic material, which comprises applying to said material a preparation containing a phosphate of the formula ##STR1## wherein X is phenyl or substituted phenyl, R.sub.1 and R.sub.2 each is bromoalkylene, then drying the material and subjecting it to heat treatment.

Abstract: Synthetic organic fibers, which have been silicone treated to improve other properties, are treated with certain chelators, such as, ethylenediamine tetraacetic acid and its salts, as flame retarders to reduce their flammability.

Abstract: A substantially continuous line screen structure pattern is formed in a color television picture tube having an interrupted-aperture shadow mask by applying a photosensitive material to a screen support and projecting light from an extended source through the shadow mask apertures and onto the coated screen support. In a preferred embodiment, the line screen is formed by projecting light from a line source through a shadow mask having a plurality of rows of elongated apertures and onto the coated screen support.

Abstract: A method of swelling the cell membranes of the cell surrounding the latex containing vessels in the underpeel of bananas to enable the latex vessels to be more resistant to temperatures within the range of 45.degree. to 55.degree. F. The method includes treating the exterior peel of the banana finger with an application of an oleaginous material having a viscosity of 10 to 10,000 centistokes, maintaining the underpeel at a temperature of above 55.degree. F during the application and holding the underpeel for a dwell period of at least 24 hours. The amount of the oleaginous material applied is sufficient to permit the oleaginous material to penetrate completely below the exterior peel and into the sites of the latex vessels' cell membranes to swell these membranes in order to prevent both a phase change in the cell membranes and an increase in the permeability of the liquid and solutes of the cells surrounding the latex vessels into the latex contained in these vessels.

Abstract: A filamentary reinforcement product for composites used in applications requiring high strength and high modulus of elasticity materials, particularly under high temperature service conditions, comprising one mil thick or thicker coatings of boron or boron carbide on a substrate which comprises about a one mil diameter carbon substrate having a catalytically transformed skin layer of highly oriented graphite formed from the carbon substrate using a boron catalyst.

Abstract: A method of inhibiting hot sulfidation corrosion of a metal surface and modifying the characteristics of any deposit thereon comprises the step of applying to such metal surface and any deposit thereon an inhibitor-modifier. The inhibitor-modifier is a mixture of chromium oxide and manganese oxide, the combustion product of a solution containing a soluble chromium compound and a soluble manganese compound, or a combination of the mixture and combustion product. The mixture and the solution contain chromium and manganese in a molar ratio of at least 1:1.

Abstract: The method of producing pyrolytic SiO.sub.2 on the surface of a substrate comprises mixing SiH.sub.4 and NOCl in an atmosphere of carrier gas, and passing the gas mixture over the heated substrate. With this process, precipitation of SiO.sub.2 on the walls of the reaction chamber is avoided.

Abstract: A process for making shell investment molds for the casting and solidification of superalloys therein embodies preparing a primary slurry composition of a mixture of at least two different flour grain sizes of fused alumina and a silica binder. The flour grain sizes range from approximately 240 mesh to approximately 400 mesh, U.S. Standard or Tyler screen series.

Abstract: Mixtures comprising compounds of the formula ##STR1## wherein A is either NH.sub.2 or N=P(NH.sub.2).sub.3, provided at least one A is N=P(NH.sub.2).sub.3, have been found to be good flame-retardants for material made from cotton or polyester-cotton having about 30 to 70% by weight cotton. Conveniently the material can be treated with an aqueous solution containing a sufficient amount of said mixtures and the material dried to make the material self extinguishing. Then the treated and dried material is cured at a sufficient temperature to bond said compounds to the material. Alternatively and usually preferably the drying and curing can be accomplished as a single operation. The treatment solution can additionally contain auxiliary treatment agents to make the material more durable to washing.

Abstract: A water soluble product suitable for rendering textile materials flame retardant is produced by condensing (a) at least one hydroxymethyl phosphorus compound selected from the group consisting of(CH.sub.2 OH).sub.4 P--Y and (CH.sub.2 OH).sub.3 Pwith (b) about 0.33 to 3 times the molar amount of at least one substituted phosphoramide of the formulaPO(NR.sup.1 CH.sub.3)(NR.sup.2 CH.sub.3)(NR.sup.3 CH.sub.3)whereinR.sup.1 and R.sup.2 each independently is H or CH.sub.2 OH,R.sup.3 is H, CH.sub.2 OH or CH.sub.3, andY is an equivalent amount of at least one anion of an acid, such as chloride, bromide, carbonate, nitrate, sulfate, phosphate or carboxylate.Advantageously, the hydroxymethyl phosphorus compound is tetrakis(hydroxymethyl)phosphonium chloride or tris(hydroxymethyl)phosphine, and is present in about 1 to 3 times the phosphoramide which is preferably tris(N',N",N'"-methyl)phosphoramide [OP(NHCH.sub.3).sub.3 ].

Abstract: Process for manufacturing a deodorizing gas filter which comprises dissolving polyvinyl alcohol in water; adding to said solution at least one substance which is an amphoteric ion exchange resin, activated carbon or coconut shell charcoal, thereby forming a pasty mass; adding to said pasty mass glyoxal, in an amount in excess of that which would be sufficient to acetalize the polyvinyl alcohol, and a small amount of acid for the acetal formation; impregnating the resulting composition into a non-woven textile fabric gas filter; and heating said impregnated filter at about 70.degree.-100.degree. C for 30 minutes to 2 hours, thereby converting said polyvinyl alcohol to polyvinyl acetal.