Abstract: Polyamide resins are used as primer for highway repairs using asphaltic membranes.

Abstract: A method of improving the resistance of glass fibers to high temperatures which comprises treating the fibers with tetrahydrofuran-2, 3, 4, 5-tetracarboxylic acid to leach the fibers prior to the deposition of a refractory metal on their surfaces.

Abstract: A method for making simulated brick or tile wall or floor using cement, water-based adhesive and water-insoluble powdered pigment. The mixture is applied and then partially set. Scoring indentations are made to remove cement. After being completely set, mortar is placed in the indentations as a grout and allowed to set. The final step is a clear water-resistant coating on the entire surface.

Abstract: Protective coating systems are reinforced by first laying a suitable mesh screen of plastic, metal or the equivalent on the surface to be protected. Thereafter, a thin layer of a coating composition, e.g., a latex cement, is poured over the mesh and allowed to set. In this operation the mesh is bonded by means of the coating composition to said surface. The screen also protrudes to the upper surface of said layer and when the latter has been allowed to set, a second layer is applied resulting in a system in which the reinforcing mesh not only aids in forming a durable bond between said first layer and said surface, but also likewise renders the two layers thus formed resistant to spalling or separating caused from expansion or contraction of said surface.

Abstract: A method of producing a flat solid electrolyte layer of a flat film type oxygen sensor is disclosed. The method comprises in steps, (a) preparing first and second electrolyte pastes each containing stabilizer, the content of stabilizer in the first electrolyte paste being smaller than that in the second electrolyte paste, (b) applying the first electrolyte paste onto an electrode layer and then applying the second electrolyte paste onto the outer face of the first electrolyte paste to form a layered paste heap on the electrode layer, and (c) firing the layered paste heap to form a solid electrolyte layer on the electrode layer. With this production method, the stabilizer is uniformly and homogeneously distributed into the body of the fired electrolyte layer.

Abstract: A process is disclosed for applying a corrosion resistant system to structural steel, in which a zinc dust paint comprising 5-15% by weight of a binder and 85-95% by weight of a metallic zinc-based pigment component is applied to the steel as a first coat, and subsequently a coat of a composition comprising an aromatic/aliphatic polyhydroxyether and/or a saturated aromatic polyester resin having a number average molecular weight of at least 4000 and a pigment having a Mohs hardness of at least 2, the volume ratio of the binder to the pigment being in the range of 50:50 to 95:5. The thickness of the first coat is about 15-150 .mu.m and that of the second coat is about 15-150 .mu.m. The invention also relates to structural steel thus coated.

Abstract: An insulating system and the method for the preparation thereof, for preparing a catalyst substrate or catalyst to provide a final product wherein a packing and catalyst are insulated from each other. A thin coat of low viscosity ceramic inorganic fiber formulaton is applied to a clean dry substrate or catalyst to wet the surface thereof to facilitate adhesion. Then at least one coat of high viscosity inorganic fiber formulation including a quantity of hollow silica microspheres is applied to the thin coat to provide an insulating coating of desired thickness (e.g. 45 mils .+-. 15 mils). Then the insulating coating is dried. The high viscosity ceramic inorganic fiber formulation is preferably produced from the low viscosity ceramic inorganic fiber formulation by the addition of the hollow silica microspheres thereto, providing very precise viscosity control. The final substrate or catalyst coating system produced has a thermal conductivity of about 2.7 BTU in h.sup.-1 ft..sup.-2 F.sup.

Abstract: A slurry shaped freshly mixed fluid compound such as paste or mortar and coarse or fine aggregate are conveyed under pressure through discrete conduits and then mixed together substantially immediately before blasting. The mixture is blasted through a nozzle against a body to be covered with concrete.

Abstract: A roof having an insulating blanket of plastic foam covered by a protective sheath made up of a shell of reinforced concrete covered by a weather-impervious rubbery textured membrane. The membrane and the shell are married together in the sheath, the shell providing load bearing strength and the membrane protecting the shell and preserving its properties. The shell adheres tenaciously to the insulating blanket and the membrane to the shell. In a preferred construction, the sheath forms a protective bonnet having a girdle surrounding the eaves and verge further anchoring the roof covering to the superstructure of the building. Shingles of special construction preferably make up the insulating blanket. Special cement and latex binder compositions are disclosed for the shell and membrane respectively.

Abstract: Lead-coated alumina fibers which are obtained by reduction of lead oxide in a glass coating on alumina fibers are particularly useful for making strong lead matrix composites.

Abstract: A jointing of concrete structure comprising applying an adhesive to a base concrete structure and applying a new concrete thereto, which is characteristic in that the adhesive comprises a vinyl acetate-ethylene copolymer emulsion having a glass transition temperature of -5.degree. to +5.degree. C., said adhesive being the vinyl acetate-ethylene copolymer emulsion per se, or a cement paste or cement mortar which contains the vinyl acetate-ethylene copolymer emulsion. The jointing of the present invention can give a strong joint force between the old concrete structure and the new concrete.

Abstract: Electrical power, instrument and communication cables constructed with combustible coverings can provide a pathway by which fire might spread. Cable fires within a room or compartment can be arrested by the construction of a properly designed "fire break" placed periodically along a cable run; and cable fire spread between rooms can be arrested by a properly placed "fire stop". Cable runs generally include a cable tray or raceway to contain the cables. An effective fire barrier, e.g., "fire break" or "fire stop" may be constructed in such a cable tray or raceway by filling a portion of the tray or raceway with a gypsum composition comprising gypsum plaster, an inert filler mixture of diatomaceous earth and lightweight expanded aggregate, and very small amounts of glycerin, boric acid and a corrosion inhibitor such as a boron nitride, boron nitrile or mixture of such boron compounds.

Abstract: A unique method for applying a lightweight cementitious coating to either existing or new roof surfaces. The invention relates to the method of preparing the coating mixture and its manner of application.

Abstract: Water proofing compositions containing a reclaimed butyl rubber of used inner tube scraps as the active component have a high adhesion to cement mortar or concrete and are used for water proofing materials in buildings and civil engineering works.

Abstract: In the production of a coated structural element by producing a workable composition of an inorganic binder and water, forming the composition into a structural element, providing an inorganic salt at least on the surface of the structural element, applying to the surface of the structural element an aqueous paste containing at least one metal oxide and waterglass thereby to form a gel-like non-fluid coating and hardening the coated structural element, the improvement which comprises hardening the structural element prior to applying the aqueous paste thereto, whereby the resulting coating is of enhanced weather resistance. The inorganic salt may be provided on the surface by being present in the workable composition per se or by being present in a facing layer applied to the structural element. It can also be provided by being sprayed thereon as an aqueous solution in which event the first hardening must precede such spraying. The resulting coatings are of enhanced weather resistance.

Abstract: A method of making a concrete tile is disclosed wherein a formed tile body having a moisture content of less than eight percent is coated with a cementitious slurry and before that slurry layer has cured, an aqueous emulsion of a film forming polymeric material is applied to the form tile.

Abstract: Water proofing compositions containing a Reclaimed butyl rubber of used inner tube scraps as the active component have a high adhesion to cement mortar or concrete and are used for water proofing materials in buildings and civil engineering works.

Abstract: Water proofing compositions containing a Reclaimed butyl rubber of used inner tube scraps as the active component have a high adhesion to cement mortar or concrete and are used for water proofing materials in buildings and civil engineering works.

Abstract: A building panel in which two sprayed concrete layers, one on top of the other, are affixed to a paper base honeycomb core. The inner layer on each side comprises concrete without fibers, and the outer layer on each side comprises concrete with 4% to 6%, by weight, of fiberglass fibers.

Abstract: Drying oils are used to improve strength and durability characteristics of gypsum wallboard paper with many unexpected additional advantages. Applied before board manufacture, critical porosity characteristics are left uninterrupted. Applied after board manufacture, shear strengths are obtained beyond expectations.

Abstract: In the production of a coated building component comprising the steps of mixing an inorganic binder, water and aggregate to produce a workable mass, molding said mass into a preformed component, applying to the preformed component an aqueous paste containing a metal oxide and at least one of waterglass and a phosphate to form a coating and allowing the coating to harden, the improvement which comprises applying about 190 to 400 g of the paste per square meter of surface to be coated, the application being effected in the presence of at least about 0.5% by weight of the inorganic binder or, in the case of lime-sand bricks, by weight of the binder plus aggregate, of a water soluble inorganic salt which converts the aqueous paste into a gel-like non-flowing form.

Abstract: A method of preparing glass fibers having a surface enriched by zirconium dioxide thereon, comprising the steps of: applying an aqueous solution of zirconyl carbonate to the surface of the glass fibers, keeping the fibers wetted under ambient conditions for a period of time to effect ion exchange with water extractable ions in the surface of the glass, and evaporate the water to leave the coated glass fibers. The coated glass fibers are especially suited for reinforcing cementitious materials.

Abstract: There is disclosed a method for the rapid curing of a partially hydrolyzed silicate film via the application of an aqueous coating. The aqueous coating composition comprises an epoxy resin and a curing agent, one of which is in an emulsion, and a hydraulic cement. Anions contained in the coating function as an alkaline catalyst causing a rapid polymerization of condensed silicates.

Abstract: In the production of a floor topping by the flow method, comprising providing a water-absorbing layer on a floor to be topped, pouring a free-flowing mass comprising an inorganic binder and water onto said water-absorbing layer whereby said mass forms a level floor topping, and allowing said mass to harden, the improvement which comprises employing as said water-absorbing layer a strong porous open-cell material. The open-cell material which serves as a water absorptive underlay preferably comprises at least one of anhydrite, gypsum, cement and lime. Preferably it is formed in place by casting a foamed mass comprising an aqueous suspension of gypsum, an aluminum salt, hydrogen peroxide and a manganese compound.

Abstract: A method of treating a corrosible steel substrate having a coating of oxidized steel thereon, which comprehends applying to the oxidized steel coating a solution of an alkyl silicate in quantity sufficient to saturate the oxidized steel coating, permitting the solution to cure by hydrolysis, and thereupon to apply a topcoating. The solution may be partially prehydrolyzed as within the range of 40-98% and may contain dry particulate matter which is water insoluble and having a coloration sufficient for visual detection so as to readily indicate the state of saturation of the oxidized steel coating. Furthermore, the solution may additionally contain water soluble corrosion inhibiting compounds for producing ions which will react with the anodic steel substrate.

Abstract: A process for promoting the adhesion of cementitious material to the surface of closed cell generally smooth skinned foam materials which process comprises the sequential steps of (1) applying to the foam surface a substantially continuous first coating of a thermoplastic styrene-butadiene-1,3 copolymer having a styrene to butadiene weight ratio of about 30:70 to 70:30, and based on the weight of said copolymer, (a) from about 2 to about 10 percent of non-ionic surfactant, (b) from about 0.75 to 7.5 percent of anionic surfactant, at least about 15 percent of which is a sodium alkyl sulfate in which the alkyl group contains 9 to 17 carbon atoms, the sum of (a) and (b) not exceeding about 11 percent by weight of said copolymer and the weight ratio of (a) to (b) being within the range of about 0.7:1 to 10:1, then (2) applying an aqueous hydraulic cementitious material to the coated surface prior to substantial dehydration of said first coating, and (3) allowing said cementitious material to harden.

Abstract: A method is provided for improving the insulating characteristics of oriented steel sheet having an inorganic surface coating to produce an organic resin-in-organic coating-oriented steel sheet composite. Certain irradiation curable solventless organic resins can be applied to the surface of the oriented steel sheet in a pollution free manner. The resulting composite can be used as power transformer core laminate.

Abstract: An improved magnetic powder characterized by high coercive force and high magnetic flux density which is formed by admixing a cobalt compound with a magnetic iron oxide, and adding to said admixture a complex forming agent which complexes with the cobalt compound to promote adsorption of cobalt onto the surface of the magnetic iron oxide.

Abstract: Novel fire resistant insulating structural building elements are provided which are comprised of unitized structures such as walls, roofs, ceilings, and floors in combination with a layer of plastic foam insulation to which is in turn bonded a coating of gypsum plaster by a layer of bonding agent. The novel elements of the invention find particular utility in the rapid and economic construction of thermally insulated and fire resistant buildings. Additionally, a method is disclosed for a facile and economic way of providing thermal barrier protection for exposed plastic foam insulation in existing buildings by the application of a bonding agent and a plaster coat on said foam.

Abstract: In the application of a plurality of layers of a settable joint compound over a reinforcing tape, in drywall construction, a thin coat of Al.sub.2 SO.sub.4 is sprayed over the tape and the board edges prior to applying the first layer and over the top of each layer immediately after the layer is applied.

Abstract: A method for inhibiting stress-corrosion cracking of a steel pipeline transmitting gas under elevated pressure provided with an external protective coating and means for cathodic protection, and steep pipe and pipelines so protected are described. The method consists of introducing a composition containing at least one of the inhibitors, calcium monobasic phosphate, sodium monobasic phosphate, sodium tripolyphosphate and potassium silicate, into a buried pipeline environment. The inhibiting composition may be simply introduced to the environment adjacent the pipeline or it may be incorporated in a coating on the pipeline, either in the primer or in a top coating thereover or in an intermediate coating between a conventional primer and topcoating, or in a tape applied to the pipeline.

Abstract: Ceramic semiconductor elements having ohmic contact surfaces are made by dispersing bentonite clay in a bonding composition consisting of a metal powder in a phosphate-chromate-metal ion solution to form a thixotropic coating material, by screen printing the coating material onto limited surface areas of ceramic semiconductor bodies, and by heating the coated bodies for curing the coating material to form adherent ohmic contact layers on the limited surface areas of the ceramic bodies.

Abstract: A method of protecting a surface from a heat source by adhering a refractory heat-insulating material to the surface using an adhesive consisting essentially of 20 - 90% by weight aqueous alkali metal silicate solution 10 - 80% by weight of a powdered metal and up to 15% by weight of a fibrous refractory material.

Abstract: A process of treating metals with coatings capable, upon heating, of providing and maintaining a controlled atmosphere around the surfaces of said metals which process comprises coating the surfaces of said metals with base coating composition capable, upon heating, of providing a gas, and then with an over-coating composition capable of maintaining the gas around the surfaces of the metals at high temperatures while excluding an environmental oxidizing atmosphere therefrom, and thereafter heating the coated metals in the oxidizing atmosphere.

Abstract: Method and composition for applying a surface covering to a wall or like substrate. The surface covering comprises a flexible strip or sheet of substantially dry, semi-hydrated gypsum, bonded to a re-enforcing mesh or lath. The method includes the steps of coating the rear face of the surface covering sheet with aqueous latex adhesive in an amount which will transfer sufficient water from the adhesive to the gypsum to hydrate and set the gypsum, and, at the same time, invert the latex to a tacky, adherent state; and applying the adhesive-coated surface covering to the substrate.

Abstract: Chromium is passivated by forming a chromium oxide layer thereon by heating at temperatures of about 450.degree.C in an atmosphere containing oxygen. While useful, per se, the process finds particular application as an integral part of overall processing schemes where thermal cycles are used.