Abstract: Surface coating methods and apparatus are disclosed which eliminate many of the disadvantages associated with known coating processes from pollution, equipment, materials, energy, labor and cost standpoints. According to techniques described, liquid compositions containing film-forming solids are formulated, then conveyed in the foam state towards a surface, and upon foam disintegration, form a film of solids on the surface. The techniques disclosed eliminate the need for solvents in paints or reduce volatile content to very minimal amounts. This method also enables polymeric compositions having high molecular weight to be employed as coating materials. Furthermore, the method has utility in nearly all coating processes where the film-forming solids are conveyed from a bulk state to a surface for coating.

Abstract: A process for preparing a semipermeable membrane, which comprises contacting a thin polyamine film applied to a liquid-permeable microporous substrate with a polyalicyclic diisocyanate or polyalicyclic dicarbonyl halide capable of reacting with the amino or imino groups in the polyamine, thereby to crosslink the polyamine at the surface portion of the thin film.

Abstract: Living plants, in particular coniferous plants, with the exception of Picea, Abies, Tsuga, Larix, Taxus and Cedrus genuses, are preserved by having them suck up a preservative liquid which is based on glycerin and water in volume proportions of 18:82 to 35:65 and contains dyestuffs for replacing the color of the plant parts after preservation. The dyestuffs are to comprise, apart from a blue and possibly also a red dyestuff, tartrazine (C.I. 19140, E102) in a concentration of from 2-10 g/l of preservative liquid. The blue dyestuff comprises preferably patent blue V (C.I. 42051, E131) in a concentration of from 0.1 to 0.8 g/l and the red dyestuff most preferably of new coccine (C.I. 16255, E124) in a concentration of from 1 to 20 g/l. The relative concentrations between the different dyestuffs are adapted into conformity with the sought-for color of the preserved plant.

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: Diaphanous mildew sealing, coating compositions are disclosed which are comprised of water containing emulsified latex particles which coalesce into a film at room temperature. A mildewcidal agent is included in an amount sufficient to kill mildew contacted by the compositions and a nonvolatile, relatively insoluble alkaline oxide or hydroxide compound is also included in a weight percent range of about 0.006 to about 0.03 times its equivalent weight. These compositions are scrubbed onto mildew infected surfaces so that the mildew colonies are dislodged and entrapped within the coatings which are formed when the compositions dry. The dried coatings containing the dislodged mildew colonies are then painted to provide a decorative surface which better resists mildew formation.

Abstract: A heat-resistant insulating coating having a high adhesion can be formed on an oriented silicon steel sheet by the use of an aqueous coating dispersion containing colloidal silica dispersed therein, at least one of monobasic phosphates of Mg, Al, Sr, Ba and Fe, at least one compound selected from chromic acid anhydride, chromate and dichromate, and at least one fine particle oxide selected from SiO.sub.2, Al.sub.2 O.sub.3 and TiO.sub.2 having a primary particle size of 70-500A and an apparent density of not higher than 100 g/l. The steel sheet having the coating is low in the iron loss and magnetostriction and shows good heat-resistant property.

Abstract: Adhesive dressing compositions are disclosed which are useful in restoring and improving adhesive joint surfaces such as grout surfaces in ceramic tile installations by easy, efficient methods. Such compositions form stain resistant, water repellent, washable coverings which adhere to most adhesive surfaces and further have properties of preferential adherability to certain adhesive surfaces compared with adjacent adherend surfaces. The compositions comprise a polymer in the form of an emulsion, an alkali-thickenable polymer, an alkaline material and water with other components including pigments, plasticizers and solvents.

Abstract: A fire-retarding polyurethane foam is applied to the interior surfaces of a mine such as mine shafts, entries and tunnels. The coating is applied by spraying a mixture of foam-forming ingredients including a hydrophilic polyoxyalkylene urethane prepolymer and a large amount of an aqueous slurry containing a phosphorous compound, alumina trihydrate and a char-forming material such as starch or wood cellulose. The foam coating acts as a protective sealant, and it can also be applied on other surfaces where insulation and fire retardancy are desired.

Abstract: Multi-layered coating compositions which comprise one or more inner coating layers which are admixtures of polymers formed from thermosetting polymeric materials and reinforcing filler materials and an outer coating layer which is an admixture of a fluoroelastomeric material and a reinforcing filler material are useful in preventing the corrosion and/or deterioration of surfaces which are in contact with corrosive substances such as strong acids, particularly, sulfuric acid. Such coating compositions are especially useful for preventing corrosion of the surfaces of the chimney liners, flue ducts and scrubbers which are present in many power plants and smelters.

Abstract: Processes for the treatment of asphalt pavements such as asphalt roads and sidewalks to make them more resistant to corrosion, that is, resistant to deterioration and disintegration, which comprises applying to the asphalt pavement a liquid composition consisting essentially of finely divided particles of a solid substance having a hardness between 8.5 and 9.5 on the Moh scale, such as a mixture of particles of silicon carbide and electrofused alumina, dispersed in a vehicle consisting of one or more organic synthetic resins and one or more solvents for the resin.

Abstract: A prosthesis for cement-free bonding to bone comprising a metal substrate coated with a biologically active glass or glass-ceramic of uniform composition and thermal coefficient of expansion and free of flaws resulting from thermo-mechanical stresses, the glass coating being bonded to the metal substrate by ion diffusion of the interface wherein the thermal coefficients of expansion of the metal substrate and the glass or glass-ceramic coating are substantially different.

Abstract: A portion of a melting or fusing adhesive in the form of a cartridge is melted in a melting chamber and supplied under pressure to an adhesive applying device. The latter includes a melting chamber with a heated facing wall having exit holes therein through which the molten adhesive may be pressed out by a piston movable in the melting chamber by way of a power drive. The starting and stopping of the adhesive supply is controlled by the movement of a work piece past the adhesive applying device.

Abstract: A primer coating composition comprising (1) a mixture of more than 50% by weight of aluminum powder and less than 50% by weight of zinc powder, and (2) at least one C.sub.1-4 -alkyl silicate, the weight ratio of (1) to (2) being 60:40 to 95:5. The composition is employed in a coating method which comprises applying a primer dispersion to the surface of a substrate to be coated. The primer disbersion is a dispersion of a mixture of more than 50% by weight of aluminum powder and less than 50% by weight of zinc powder in a solution of at least one organic solvent-soluble C.sub.1-4 -alkyl silicate in an organic solvent. The weight ratio of the metal powder to the alkyl silicate is as indicated. The coating is baked and a finishing powder paint is coated on the resulting primer. The finished coating is then baked.

Abstract: A method of coating glass containers and a composition for such coating, wherein a one-step application of the coating is effected, with an aqueous mixture of a polyamino-acrylate ester, a cross-linking agent therefor, a wax, and a vinyl amino silane coupling agent applied to the container at a temperature of between about 200.degree.-400.degree. F. upon exit of the containers from an annealing lehr.

Abstract: In accordance with the proposed method of making antifriction products, a porous carbon blank is heated up to 1,800.degree. to 2,200.degree. C. and impregnated with molten silicon. The impregnation starts at a temperature of 2,100.degree. to 2,200.degree. C. for 3 to 5 minutes, then at 1,800.degree. to 2,050.degree. C. for 30 to 40 minutes. Thereafter, the blank is cooled down to a temperature of 900.degree. to 800.degree. C. at a rate of 30.degree. to 40.degree. C./min, then down to 200.degree. to 150.degree. C. at a rate of 50.degree. to 100.degree. C./min. This permits obtaining products with an even phase distribution, whereby their wear resistance and strength are improved.

Abstract: A sleeve assembly for sanding, rust removing, and pit filling on a piston rod of a hydraulic cylinder or the like includes a sanding component, a rust removing component and a pit filling component. The sanding component comprises a rigid annular outer member, a resilient annular intermediate member adhesively secured to the inner surface of the outer member, and an abrasive annular inner member adhesively secured to the inner surface of the intermediate member and in interference contact with the piston rod. The rust removing component comprises an annular upper ring member composed of a rigid material and an elastomeric annular lower C-ring member having brass or bronze particles imbedded therein. The pit filling component comprises an annular upper ring member composed of a rigid material and an elastomeric annular lower C-ring member having lead particles imbedded therein. Clamp means releasably engages the members of each of the components about the piston rod.

Abstract: A carboxylated polymer latex containing a minor amount by weight of a heat sensitizer sufficient to gel the polymer and which also can contain fillers, wetting agents and stabilizers can be used to provide a water resistant film on the surface of a hot rubber compound or composition which subsequently can be cooled rapidly with water and dried. The resulting latex coated rubber can then be stacked or assembled without sticking.

Abstract: A wet chemical method for the direct deposition of cuprous oxide onto a transparent nonmetallic substrate such as glass wherein the electrolessly deposited cuprous oxide film is heated to effect a change in the color of transmitted light is disclosed.