Abstract: A tire sealant and inflator composition for the repair of puncture wounds in pneumatic tires and the like. The composition utilizes a sealing component consisting of an acrylic resin dissolved in a suitable solvent and a hydrochlorofluorocarbon and/or hydrofluorocarbon propellant component to deliver the sealing component from an aerosol container into the tire to a driveable state.

Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.

Abstract: A coating composition is based on polyvinyl chloride plastisol containing thermoplastic microspheres and is suitable for use as underbody compound for vehicles. The coating composition contains a mixture of expandable and expanded microspheres, in which the expandable microspheres expand at a temperature in the vicinity of the temperature at which the expanded microspheres begin to collapse. The mixture of microspheres solves the problem of a varying density of the coating when the plastisol is gelatinated.

Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.

Abstract: Process of mixing a fugitive plasticizer, e.g., ethylene carbonate, with moist particulate polyacrylonitrile then removing the water enabling adjustment of the melt viscosity for extrusion of the polyacrylonitrile into film, fiber, pellets and shaped articles. Stretching and heating the extruded polyacrylonitrile film or fiber causes the fugitive plasticizer to exude and vaporize from the film or fiber, carrying with it any remaining acrylonitrile monomer. The resulting film or fiber exhibits substantially increased molecular weight, thus enhancing the tensile strength and barrier properties of the polyacrylonitrile product. The process also produces polyacrylonitrile foam products. A novel cross-linking agent for polyacrylonitrile, divinyloxybutane, is disclosed. Thermostabilizing agents for polyacrylonitrile, N-maleimides and stilbene derivatives, are also disclosed.

Abstract: The present invention provides a new and improved method of producing coating materials comprising the steps of providing a first organic material which is solid at room temperature, providing a second organic material which is solid at room temperature and which is substantially different in chemical composition from the first organic material, providing a source of supercritical fluid, providing a first container having a mechanical agitator, providing a second container, introducing the first and second organic materials and the supercritical fluid into the first container and mechanically agitating such materials and the supercritical fluid, and discharging the contents of the first container into the second container so as to collect substantially all of the first and second organic materials in the second vessel, the second container being maintained at a lower pressure than the first container.

Abstract: Methods and apparatus are disclosed for producing a composition material which embodies both physical and chemical properties of a physically expanded polymer and specific structural and/or chemical properties of solid particles fully encapsulated within membranes in the expanded polymer.

Abstract: A coating composition suitable as an undercoating for cars contains vinyl-chloride-polymer-based plastisol and expandable thermoplastic microspheres. The expandable thermoplastic microspheres have a substantially halogen-free polymer shell which comprises a copolymer of halogen-free monomers and, in an amount of at least about 80% by weight, nitrile-containing monomers. Preferably, the polymer shell of the thermoplastic microspheres contains from about 85% by weight to about 97% by weight of nitrile-containing monomer. A method for spray-coating a surface with the coating composition by airless spraying is also disclosed.

Abstract: There is now provided a closed cell rigid polyisocyanate based foam blowing with a C.sub.1 -C.sub.4 hydrofluorocarbon and water as blowing agents, which possesses a uniform density gradient varying by not more than 10 percent. There is also now provided a froth foaming mixture having good flow by employing a hydroxy terminated polyol which is pH neutral and a tertiary amine ether blow catalyst in an amount of 0.5 weight percent or more, using water and a C.sub.1 -C.sub.4 hydrofluorocarbon having a boiling point of 300 K. or less as co-blowing agents.There is also provided a polyol composition having an average OH number of less than 400 and an average functionality of greater than 4, which when reacted with the isocyanate in the presence of a C.sub.1 -C.sub.4 hydrofluorocarbon, yields a rigid closed cell polyisocyanate based dimensionally stable foam.

Abstract: An acoustic ceiling patch or textured material in the form of a sprayable composition including a base, a filler and a binder as well as a propellant or carrier storable and dispensable from a pressurized dispenser having a delivery nozzle and a removable dispensing tube. An aerosol system with a spray nozzle is included on the container for selective discharge of the textured material onto a prepared patch area which may be on a drywall or support panel so as to match and blend with the surrounding acoustic ceiling surface area in order to provide a continuous and unbroken coextensive surface texture of mechanically and visually matched material. A distribution straw is included for selectively conducting the textured material in a desired direction while holding the dispenser upright.

Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.

Abstract: Polyfluoroalkanes are used as propellants in sprayable compositions or in the the preparation of plastic foams and in the electrical industry as cleansing and degreasing agents.

Abstract: An acoustic ceiling patch or textured material in the form of a sprayable composition including a base, a filler and a binder as well as a propellant or carrier storable and dispensable from a pressurized dispenser having a delivery nozzle and a removable dispensing tube. An aerosol system with a spray nozzle is included on the container for selective discharge of the textured material onto a prepared patch area which may be on a drywall or support panel so as to match and blend with the surrounding acoustic ceiling surface area in order to provide a continuous and unbroken coextensive surface texture of mechanically and visually matched material. A distribution straw is included for selectively conducting the textured material in a desired direction while holding the dispenser upright.

Abstract: Novel formulations for aqueous foams which, in the presence of hydrocarbons, can persist for 24 hours or more. The foams are suitable for the suppression of hydrocarbon and polar organic vapors.

Abstract: A process for providing extrudable polyacrylonitrile compositions. Dry, particulate polyacrylonitrile having a moisture content of less than about 1.5 percent is mixed with a liquid plasticizer such as ethylene carbonate or propylene carbonate at a mixing temperature of about 140.degree. C. to about 180.degree. C. This process produces an extrudable polyacrylonitrileplasticizer composition which can be extruded to form film, fiber or other extruded or co-extruded products.

Abstract: There is now provided a rigid closed cell polyisocyanate based foam for use as a positive flotation material for watercraft which meets the U.S. Coast Guard immersion test (CGD 75-168, 33 C.F.R. .sctn.183.114). As a blowing agent for this foam, a mixture of 1,1,1,2-tetrafluoroethane (R-134a) as a frothing agent and water is used, where the amount of water is less than 2.5 weight percent based on the weight of the formulated polyol composition. Also, in preferable embodiments, the polyols in the polyol composition are initiated by at least one amine; and the polyol composition contains a delayed action tertiary amine catalyst. The foams used in the invention have excellent dimensional stability. In another embodiment, there is also provided a formulated polyol composition of R-134a and a polyol composition having an average OH# of less than 400 and an average functionality of greater than 4 using R-134a and less than 2.5 wt.

Abstract: The present invention provides a new and improved method of producing coating materials comprising the steps of providing a first organic material which is solid at room temperature, providing a second organic material which is solid at room temperature and which is substantially different in chemical composition from the first organic material, providing a source of supercritical fluid, providing a first container having a mechanical agitator, providing a second container, introducing the first and second organic materials and the supercritical fluid into the first container and mechanically agitating such materials and the supercritical fluid, and discharging the contents of the first container into the second container so as to collect substantially all of the first and second organic materials in the second vessel, the second container being maintained at a lower pressure than the first container.

Abstract: An insulating material consisting essentially of fly ash particles and a binder and a method for making the same. In one embodiment of the present invention, fly ash particles are mixed with a dissipating foam which contains a binder. The foam acts to spread the binder and separate the fly ash particles, thereby coating the fly ash particles with the binder. When the foam dissipates the binder acts to bind the fly ash particles together in clusters. The clusters of fly ash particles are then suitable to be used as blown-in insulation.

Abstract: This invention relates to stabilizing isocyanate-reactive compositions containing flame retardants by the use of certain tertiary amines or ammonium compounds, in which said stabilized compositions are prepared by mixing(a) at least one isocyanate-reactive compound having a molecular weight of 400 to 10,000 and a functionality of 2 to 7;(b) at least one isocyanate-reactive compound having a molecular weight of less than 399 and a functionality of 2 to 6;(c) at least one (i) isocyanate-reactive tertiary amine polyether, (ii) fatty amido-amine, and/or (iii) ammonium salt derivative of a fatty amido-amine;(d) a flame retardant;(e) a catalyst; and(f) optional additives.This invention also relates to urethane-based products prepared by reaction of organic polyisocyanates with such compositions.

Abstract: A process for producing hollow particles of crosslinked melamine resin having a uniform particles diameter, said process comprising subjecting a water-soluble methyl-etherified-melamine resin precondensate to condensation reaction in the presence of a curing catalyst in an aqueous solution containing a water-soluble polymer with carboxyl groups or water-soluble copolymer of ethylenically unsaturated carboxylic acid monomer, when the reaction liquid becomes turbid, adding to the reaction mixture a substance which dissolves or swells the melamine resin, and continuing the condensation reaction, if necessary.

Abstract: A pressurized dispenser is disclosed herein having a container housing a quantity of acoustic ceiling patch or textured material mixed with base, filler and a binder as well as with a carrier such as aerosol. A manual pump or spray nozzle is included on the container for selective discharge of the patch or textured material onto a prepared area which is a drywall or support sheet so as to match and blend in with the surrounding acoustic ceiling surface area to provide continuous and unbroken coextensive surface texture of mechanically and visually matched material.

Abstract: A tire sealant and inflator composition for the repair of puncture wounds in pneumatic tires and the like. The composition utilizes a sealing component consisting of an acrylic resin dissolved in a suitable solvent and a hydrochlorofluorocarbon and/or hydrofluorocarbon propellant component to deliver the sealing component from an aerosol container into the tire to a driveable state.

Abstract: A method for reducing the amount of microfoam in a spray-applied clear waterborne polymeric composition is provided, wherein the clear composition contains certain emulsion-polymerized addition polymers or certain multi-staged emulsion-polymerized addition polymers is formed; is spray-applied to a substrate; and is dried. Also provided are substrates bearing such spray-applied clear compositions.

Abstract: An improved process for production and delivery of a plastisol foam is provided. By the process, plastisol foam is maintained under controlled pressures and conditioned to enhance homogeneity and percent foam. Also provided is a process for intermittently dispensing a fluid such as a plastisol foam, by which drip may be prevented. Additionally provided is novel apparatus for preventing drip.

Abstract: The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, and a reaction catalyst, the improvement comprising employing monochlorodifluoromethane as the sole blowing/frothing agent in said reaction in order to produce a CFC-free essentially closed-cell rigid or semi-rigid polyurethane foam. Also claimed is the foam produced by the above process.

Abstract: A method of producing an open cell rigid polyurethane foam which comprises reacting a mixture of polyols having a hydroxyl value of 160-360 mg KOH/g with a polyisocyanate in the presence of water as a blowing agent in an amount of 6-12 parts by weight in relation to 100 parts by weight of the mixture of polyols at an isocyanate index of 70-120, the mixture of polyols comprising:(a) 30-60% by weight of a first polyoxyalkylene polyol having a functionality of 2-3.

Abstract: Compositions for producing foamed products which include additives and blowing agents which cause the surface treatment additives to migrate to the surfaces of foamed products. The products produced from the compositions require less additives because the incorporated additives are concentrated at the surfaces thereof.

Abstract: Processes for producing a polyurethane, a rigid polyurethane foam, a flexible polyurethane foam and a spray type rigid polyurethane foam are disclosed. In these processes, a specified tertiary aminoalcohol is used as a polyol component and a catalyst.

Abstract: Process of mixing a fugitive plasticizer, e.g., ethylene carbonate, with moist particulate polyacrylonitrile then removing the water enabling adjustment of the melt viscosity for extrusion of the polyacrylonitrile into film, fiber, pellets and shaped articles. Stretching and heating the extruded polyacrylonitrile film or fiber causes the fugitive plasticizer to exude and vaporize from the film or fiber, carrying with it any remaining acrylonitrile monomer. The resulting film or fiber exhibits substantially increased molecular weight, thus enhancing the tensile strength and barrier properties of the polyacrylonitrile product. The process also produces polyacrylonitrile foam products. A novel cross-linking agent for polyacrylonitrile, divinyloxybutane, is disclosed. Thermostabilizing agents for polyacrylonitrile, N-maleimides and stilbene derivatives, are also disclosed.

Abstract: The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, and a reaction catalyst, the improvement comprising employing monochlorodifluoromethane as the sole blowing/frothing agent in said reaction in order to produce a CFC-free essentially closed-cell rigid or semi-rigid polyurethane foam. Also claimed is the foam produced by the above process.

Abstract: Processes for producing a polyurethane, a rigid polyurethane foam, a flexible polyurethane foam and a spray type rigid polyurethane foam are disclosed.In these processes, a specified tertiary aminoalcohol is used as a polyol component and a catalyst.

Abstract: Substantially homogeneous aqueous suspensions of low density microspheres are presented as contrast media for imaging the gastrointestinal tract and other body cavities using computed tomography. In one embodiment, the low density microspheres are gas-filled. With computed tomography, the contrast media serve to change the relative density of certain areas within the gastrointestinal tract and other body cavities, and improve the overall diagnostic efficacy of this imaging method.

Abstract: A process for producing hollow particles of crosslinked melamine resin having a uniform particles diameter, said process comprising subjecting a water-soluble methyl-etherified-melamine resin precondensate to condensation reaction in the presence of a curing catalyst in an aqueous solution containing a water-soluble polymer with carboxyl groups or water-soluble copolymer of ethylenically unsaturated carboxylic acid monomer, when the reaction liquid becomes turbid, adding to the reaction mixture a substance which dissolves or swells the melamine resin, and continuing the condensation reaction, if necessary.

Abstract: The present invention relates to an improved process for producing, by means of a portable foaming apparatus having a static mixer, a polyurethane foam by reacting a reaction mixture comprised of a polyol, an organic isocyanate, a foaming/frothing agent, and a reaction catalyst, the improvement comprising employing monochlorodifluoromethane as at least a portion of said blowing/frothing agent in said reaction and employing an acid-blocked amine catalyst as at least a portion of said reaction catalyst in order to produce a CFC-free essentially closed-cell rigid or simi-rigid polyurethane foam.

Abstract: Compositions and a process for manufacture are provided for synthetic polymer-propellant systems that form cohesive foamed structures from which aqueous solutions can be expressed, where the useful temperature range over which these structures form is broadened by using a propellant mixture consisting predominantly of a propellant that is a poor solvent for the polymer and has a vapor pressure in the range of 10-35 psig at 20 C in combination with a small amount of a propellant that is a good solvent for the polymer; and where these coherent foamed structures can be formed even with aqueous solutions containing 0 to about 30% alcohol, provided that insoluble fine-particle solids that do not pack and become difficult to redisperse are included in the composition.

Abstract: A foam absorber having electromagnetic energy attenuation characteristics comprising an open cell reticulated polyurethane foam impregnated with a conductive ink applied to a surface of the foam substrate. The conductive ink is applied as by spraying to a surface of the foam, coating such surface and gradiently loading the foam with the ink by penetration of the ink in gradually decreasing amount into the foam to a final depth therein. The conductive ink is comprised of an epoxy resin carrier and a combination of carbon and a metal such as silver, copper or nickel, preferably silver. The ink is applied as a curable mixture containing a solvent, to the foam substrate, the solvent is evaporated following coating and penetration of the ink into the foam, and the epoxy carrier of the ink in the foam substrate is cured.

Abstract: A process for forming polymer powders by dissolving one or more polymers in a suitable solvent, followed by atomizing the solution into a droplet atmosphere of a non-solvent to precipitate polymer particles. The particles are separated from the non-solvent, washed and dried to produce a powder with a rounded particle morphology, high internal porosity and surface area, and high apparent density.Polymer powders with these properties can be pressed to dense shaped articles suitable for sintering in automated presses because the powders have good low and compressibility characteristics. The process if particularly useful when applied to soluble polymners that are not readily shaped by melt processing means.

Abstract: The present invention relates to a process for preparing polyurethane/polyurea or polyurea elastomers by spray processing or reaction injection molding a reaction mixture comprising an A-side and a B-side, wherein said A-side comprises a polyisocyanate or an isocyanato-terminated polyurethane prepolymer and wherein said B-side comprises a polyol or polyamine plus a chain extender, in order to form a polyurethane/polyurea or polyurea elastomer, said polyol having an equivalent of between about 1,000 and about 20,000, a preferred molecular weight of between about 5,000 and about 30,000 and an end group unsaturation level of no greater than 0.

Abstract: The present invention relates to a polyol composition used to produce a rigid polyurethane foam by a spraying method and also to a method for producing a rigid polyurethane by a spraying method using the composition.The polyol composition of the present invention is characterized by comprising a polyol mainly composed of an ethylenediamine-alkylene oxide addition polyol and a smaller amount of a halogenated hydrocarbon blowing agent and a larger amount of water than in the production of rigid polyurethane foams by a known spraying method. More particularly, the polyol composition of the present invention comprises a polyol containing not less than 45% by weight of an ethylenediamine-alkylene oxide addition polyol and having an average hydroxyl value of 250-550, and a blowing agent comprising not more than 45% by weight of a low boiling halogenated hydrocarbon blowing agent and 1-6 parts by weight of water, per 100 parts by weight of said polyol.

Abstract: A packaged aerosol preparation is provided for use in removing lint, hair and other particulate matter from fabrics. The sprayable liquid composition is packaged in a valve-equipped aerosol container. The composition includes an acrylic polymer or copolymer resin, a tackifier or plasticizer, and a liquified propellant consisting of either dimethyl ether or a mixture of dimethyl ether with a hydrocarbon propellant. The composition can be applied to absorbent substrates such as paper towels to provide an effective, disposable removal device.

Abstract: An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a hydroxyl group-containing polymer, (b) a cross-linking agent containing a polyisocyanate compound which is capable of reacting with the hydroxyl groups of the polymer to crosslink the polymer at a temperature higher than the melting point of the thermoplastic resin and which is solid at room temperature, and (c) a blowing agent capable of decomposing and generating a gas when heated to a temperature higher than the melting point of the thermoplastic resin. Powder coating with the coating composition can give a heat-insulating, foamed sheath or lining over the surface of a metal tube or box to be used in air conditioners.

Abstract: A process for producing a urethane-modified polyisocyanurate foam comprises mixing a polyisocyanate component, a polyl component containing an aromatic polyester polyol, a catalyst, a foaming agent, a surfactant and other additives under high pressure in a mixing head and then spraying the resultant mixture to expand the foaming ingredient therein. The process uses, as the catalyst, at least three compounds of N,N',N"-tris(dimethylaminopropyl)-S-hexahydrotriazine, an alkali metal carboxylate and a lead compound in combination.

Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.

Abstract: Compositions and a process for manufacture are provided for synthetic polymer-propellant systems that form cohesive foamed structures from which aqueous solutions can be expressed, where the useful temperature range over which these structures form is broadened by using a propellant mixture consisting predominantly of a propellant that is a poor solvent for the polymer and has a vapor pressure in the range of 10-35 psig at 20.degree. C. in combustion with a small amount of a propellant that is a good solvent for the polymer; and where these coherent foamed structures can be formed even with aqueous solutions containing 0 to about 30% alcohol, provided that insoluble fine-particle solids that do not pack and become difficult to redisperse are included in the composition.

Abstract: A novel anhydrous nonflammable tire sealer and inflator composition comprising a hydrochlorofluorocarbon (HCFC) propellant, a solvent, and a rubber resin soluble in the solvent. The composition is packaged in aerosol cans and is used to seal and inflate punctured pneumatic tires. The composition utilizes a solvent-based adhesive resin with a hydrochlorofluorocarbon propellant in order to provide a nonflammable composition which does not utilize environmentally objectionable chlorofluorocarbon (CFC) propellants.

Abstract: A method and apparatus for creating molten thermoplastic material foam by separately pressurizing the molten thermoplastic material and a gas and by delivering that material and gas sequentially to a premixing chamber, through a sintered metal insert and a post mixing chamber, to a discharge orifice of a spray nozzle. The apparatus for practicing this method comprises a nozzle assembly, including a nozzle adaptor and a nozzle, the adaptor of which has flow passages for delivering the pressurized gas and molten material to a premixing cavity and subsequently to and through a sintered metal insert contained within the nozzle.

Abstract: A process for preparing permeable adhesive tapes, which comprises dispersing water or water and a water absorptive high-molecular weight compound homogeneously in a solution of a natural or synthethic rubber or acrylic pressure sensitive adhesive agent in an organic solvent, applying the dispersion onto a releasing agent applied sheet, drying the adhesive agent applied sheet, and laminating a porous backing material on the adhesive agent applied surface to obtain a permeable adhesive tape.

Abstract: A propellant is mixed with unsaturated polyester inside a first space (A) at a first pressure, for example at the atmospheric pressure. The polyester is then sprayed on the whole or parts of an open or exposed mould which is applied in a low-pressure chamber having a powerful negative pressure of 60-95% vacuum. In order to spray a first layer, polyester having a first amount of propellant is sprayed on the mould. At the initiation the propellant causes a powerful foaming effect at which bubbles are created and/or expanded in the polyester. In order to spray a second layer, which can be applied before or after the first layer, polyester having a second amount of propellant, or is without propellant, is sprayed on the mould, which causes fewer bubbles or no bubbles at all. The resulting polyester which comprises formed and expanded bubbles is bound (is allowed to tack rigid shape/is polymerized) by the use of a short tack-free time in the low pressure, said short time being preferably 5-10 minutes.

Abstract: A process for preparing a slow-burning, low-smoking, high heat-distortion-temperature polyisocyanurate polymer and the polymer produced thereby, which process comprises reacting an MDI prepolymer with a caprolactone polyol in the presence of a trimerization catalyst, wherein the MDI prepolymer is prepared from an MDI having a functionality of about 2.4 or less, and particularly a 2.4 isomer, and with an ethylene-oxide-capped polypropylene oxide polyol, the process providing for the formation of a rigid, high heat-distortion RIM or an open-spray molded part.

Abstract: A sprayable and foamable insulating composition comprising: (A) at least one low molecular weight polymer selected from the group consisting of ethylene/alphaolefin copolymer, ethylene/alphaolefin/nonconjugated polyene terpolymer, polyacrylate, polymethacrylate, polyisoprene, polyacrylonitrile, polymethacrylonitrile and polybutadiene; (B) an effective amount of curative; and (C) an effective amount of a blowing agent having an activation temperature which is less than or about equal to the curing temperature of component (B), said composition having a Brookfield viscosity of about 100,000 centipoise or less at shear rates of 5 sec.sup.-1 or greater. A process for providing a layer of insulating foam employing such composition is also disclosed.