Abstract: A boron nitride ceramic is used as a high temperature gasket material to prevent gas leakage between an exhaust gas oxygen sensor and the exhaust system of an internal combustion engine.

Abstract: A tire gel balancing composition having a Storage modulus of between 3000 and 15000 Pa and the Specific Gravity less than 1000 kg/m.sup.3 in the temperature range between -20.degree. and +90.degree. C., preferably its Storage modulus is about 9000 Pa, is capable of balancing tires by being able to flow under the vibrations caused by imbalance in a wheel assembly. The composition preferably comprises a mixture of: 1) paraffinic oils, polybutene oils, polyol esters or polyol ethers; 2) hydrophobic or hydrophilic fumed silica; 3) poly-alkyl-methacrylates, styrene-ethylene-propylene block copolymers or polyhydroxycarboxyl acid derivatives; and optionally corrosion inhibitors and antioxidants.

Abstract: This invention relates to sealing compositions and, more particularly, sealing compositions for use in conjunction with tail seals of tunnelling machines. In particular a sealing composition according to the invention comprises, by mass, from 10 to 55% of a petroleum-derived wax, or wax-consistency hydrogenated vegetable oil or fat, or a polyisoobutane of oil, grease or wax consistency, or any combination of the above, from 0.5 to 15% of a lipophilic emulsifier, and water in sufficient concentration (at least 20% preferably 20-75%) to inhibit combustion of the composition.

Abstract: A compressible graphite lubricant having a memory suspended in an anaerobic adhesive pipe sealant mixture of a polymerizable liquid acrylate ester monomer and a peroxy polymerization initiator. The graphite particles are formed of expanded graphite which gives the pipe sealant both compressibility and lubricating characteristics. The compound has the ability to change from a liquid with sufficient lubricity to assemble standard API and premium threaded connections without galling and then transform and fix itself into a continuous solid blocking or sealing agent in the gaps of the thread form. The expanded (compressible) graphite has a memory and, as part of the anaerobic fixing compound, allows the pipe sealant to maintain its sealing integrity under cycling of tension, compression, bending, and thermal expansion and contraction.

Abstract: An improved sealant for sealing leaks in pipelines and refrigeration and air conditioning circuits includes a partially hydrolized tetra methoxy silane along with another organo silane sealant. The use of a partially hydrolized tetra alkoxy silane, such as partially hydrolized tetramethoxy silane, in place of an unhydrolized tetra alkoxy silane, gives a stronger and tougher and more elastic seal, and the partially hydrolized material is less toxic than the unhydrolized material.

Abstract: A punctured, substantially deflated pneumatic automotive tire is internally sealed using a specially designed sealant canister containing CO.sub.2 gas propellant and a tire sealant mixture. The canister sealant comprises approximately 97% by weight of an acrylic latex material which is present with the propellant under a pre-use internal pressure of about 55-65 psig. An outlet cone portion of the canister is removably connectable to the tire inflation valve, and the internal volume and pre-use pressure of the canister are related to the internal volume and normal full inflation pressure of the tire in a manner such that the canister is operative to deliver essentially its entire contents into the tire, yet only partially inflates the substantially deflated tire past its initial pressure.

Abstract: A storage-stable, stop-leak formulation contains a ground plant root material, an alkaline metal salt of a C1-C3 carboxylic acid and water. The formulation may further include corrosion inhibitors, biocides, lubricating agents, dyes and the like. Typically, the stop-leak formulation includes 1-50 parts by weight of the root powder, 1-15% by weight of the salt and 120-180 parts by weight of water. Preferably the root powder is ginger root powder and the salt is potassium acetate.

Abstract: An improved tire sealant containing a hydratable salt and clay such as barium sulfate and sodium bentonite and a substantial portion of a plate like mineral such as mica. Improved suspendability and sealing performance in the presence of an alkylene glycol antifreeze such as propylene glycol is provided by an anionic thickening agent such as carboxymethylcellulose and mica flakes having an amount of both large and very fine sized particles.

Abstract: The present invention resides in a sealant composition for pressurized articles, and in the articles comprising the sealant. The present invention is particularly useful as a sealant for high pressure tires, adapted for pressures higher than 50 psig. The sealant of the present invention comprises a high molecular weight elastomer, a low molecular weight liquid elastomer, and a cross-linking agent. The low molecular weight liquid elastomer is substantially free of iron.

Abstract: An improved stop-leak formulation containing ground plant root material, glycol, and water is provided. The formulation can contain other additives such as corrosion inhibitors, lubricating agents, and the like. The stop-leak formulations exhibit significantly improved storage stability. Over extended storage periods, the plant root powder remains readily dispersible in the glycol/water mixture. Generally the stop-leak formulations contain 1 to 50 parts by weight plant root powder, 20 to 80 parts by weight glycol, and 100 parts by weight water. One preferred stop-leak formulation contains 15 to 30 parts by weight ginger root powder, 35 to 55 parts by weight diethylene glycol, and 100 parts by weight water.

Abstract: The present invention provides mobile sealant compositions that are particularly useful for bicycle tire tubes and the like. The improvements include a novel particulate for use in the sealant composition that is greatly conformable for closing pores in a plug. Another improvement includes a balanced fiber composition as part of the sealant. Also, the carrier fluid is formulated to substantially reduce losses due to gaseous diffusion by preferably utilizing high levels of ethylene glycol, such as greater than about 60 percent.

Abstract: Dry powdered montmorillonite clay particles are thoroughly and vigorously mixed with water to form a suspension. The suspension is then spread over a concrete slab or the like and allowed to seep through any hairline cracks or interconnected pores in the concrete. As the suspension seeps through the cracks and/or pores, the clay particles are gradually filtered out of the suspension and clog or seal the cracks and/or interconnected pores.

Abstract: An emergency flat roof repair method and material which can be used during rain storms in standing water which involves the spreading of a sealer composed of sodium bentonite particles over the leak by hand or spreader. On contact with water the sealer expands and gravitates to the leak almost instantly plugging the same.

Abstract: A process is provided for feeding cables, wires, pipes etc. through a wall in such a way that the water- and/or gas resistance of the wall is maintained and that later on additional cables etc. can be passed through. The process uses a sealing agent comprising an intimate mixture of a water-swellable substance such as a clay and a hydrophobic substance such as vaseline. The sealing agent can be placed in a tubular device for providing water-tightness when making a bushing in a partially porous wall.

Abstract: The technique of the instant invention includes the preparation of a new mechanical seal life prolonger (SLP) by the compounding of a relatively few, inexpensive, and readily available materials. The instant technique is simply and easily placed into practice by, for example, applying relatively small amounts of such compound to the outside edges or peripheral portions of the relative movement interface between the seal faces of mechanical seals in association with fluid handling devices while such devices are in an operating mode. Depending on the degree of disruption of the sealing surfaces, a single application of such compound is sometimes sufficient to obtain the desired results or it may be necessary to subsequently apply such compound to the leaking seal at regular intervals subsequent to the first application thereof, until such time as it may be convenient to replace such seal faces.

Abstract: A pipe thread sealant paste composition comprising from about 30 to about 80 percent by weight of natural flake graphite particles of a size sufficient to pass through a 100 Tyler mesh sieve and a liquid carrier comprising a mixture of mineral oil and petrolatum, the paste composition preferably having a total ash content of no greater than about 1 percent by weight and containing leachable chlorides in amounts equal to or less than about 50 parts per million. The invention also relates to a method for preparing and applying the pipe thread sealant paste to pipe joints.

Abstract: Colloidal polymer dispersion for internal sealing of pipe connections containing 1-40% by weight of a water-soluble polyol and 99-60% by weight of an aqueous colloidal polymer dispersion.

Abstract: A free aggregate usable in forming wood concrete products is formed of a plurality of individual wood pinchips encased in kaolin to a degree sufficient to seal in water soluble "cement poisons" held in the pores of the chips, while maintaining the individual chips in a free aggregate form. The product is formed by a process which includes the step of encasing the individual particles with a mineralizing coating of the kaolin to a degree sufficient to seal in the water soluble cement poisons. As a preliminary step, the pores of the chips are sealed with an aluminum sulphate-water solution. Once cured, the chips are dimensionally stable, will not deteriorate and are not easily influenced by environmental conditions. Moreover, since the cement poisons are sealed within the chips, they cannot leach out to suppress hardening of a portland cement mix into which the chips may be introduced to form an aggregate in the formation of wood concrete products.

Abstract: A mixture of swellable clay, such as bentonite, is charged with an additive which provides an excess of univalent ions which tend to neutralize the deleterious effects of ions which are naturally present in seawater. The mixture is deposited on and carried by a sheet to facilitate its uses as a pond liner or a foundation sealant.

Abstract: A mixture of swellable clay, such as bentonite, is charged with an additive which provides an excess of single-charged cations which tend to neutralize the deleterious effects of double-charged cations which are naturally present in seawater and industrial waste. The mixture is deposited on and carried by a sheet to facilitate its uses as a pond liner or a foundation sealant.

Abstract: A sealant for the cooling system of automotive and other engines is in the form of an aqueous solution which flows into the cracks of the engine and then solidifies in situ to seal the cracks. The aqueous solution comprises major and minor additives to water. Numerous possible major ingredients are disclosed.

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 of using a particulate matter formed of a tri-dimensional cross-linked superabsorbent hydrogel for stopping leaks in a cooling system of a vehicle. The hydrogel is added to a filled coolant system and the engine is run for a period of time until the leakage stops.

Abstract: A thixotropic tire balancing composition having a yield stress value between 30 Pa and 260 Pa, preferably about 120 Pa, is capable of balancing air by being capable of flowing under the influence of the vibrations induced when a heavy spot on the tire contacts the road surface. The composition preferably comprises a mixture of: (1) a liquid di- or trihydric alcohol or a di-, tri-, or tetrameric oligomer thereof, optionally containing water; (2) a polymer soluble or dispersible in the alcohol; (3) hydrophilic fibers; and, optionally, ( 4) a hydrophilic filler. The alcohol 1) is preferably a diol of the general formula HO-(CH(R)-CH.sub.2 -O).sub.n -H wherein R is hydrogen or C.sub.1-2 alkyl and n is an integer from 1 to 4.

Abstract: A sealing system and sealing composition are provided for inflatable articles containing air under pressure. The sealing composition includes particles or particulates of shapes having sharp corners thereon which tend to dig into the article around the opening and wedge themselves therein. The sealing composition also includes fibers, at least some of which are fibrillated. The fibers tend to wrap around the particles and further plug the leak opening. The particles and the fibers are in a liquid carrier which also tends to form a bond of the particles and fibers in the leak opening. The particles in the composition are of particular ranges of sizes for different articles, the larger particles being used in larger articles, such as large tires for construction machines, for example.

Abstract: A sealing system for combustible engines and the like includes solid particles for plugging large holes or cracks. The solid particles are carried by a liquid which can flow into smaller cracks and then quickly solidify to seal those smaller cracks.

Abstract: A sealing system for combustible engines and the like includes solid particles for plugging large holes or cracks. The solid particles are carried by a liquid which can flow into smaller cracks and then quickly solidify to seal those smaller cracks. Alternatively the sealant may be solely a liquid by mixing potassium silicate with ethylene glycol and water.

Abstract: A method of sealing leaking gas pipe joints by injecting a catalyzed acrylic monomer composition into the leaking joint and curing the composition in the joint to seal the leak is characterized in that the composition when cured has a glass transition temperature which is no more than 0.degree. C. and is at least about 5.degree. C. below the minimum pipe joint operating temperature. Suitable sealants are mixture of long chain monoacrylic esters, hydroxy functional acrylic esters, acid monomers, plasticizers and polyfunctional acrylic esters.

Abstract: The two components of the putty, one containing the accelerator and the other containing the catalyst, are placed in two separate containers under vacuo. After the preparation is complete the containers are brought first to atmospheric pressure and then to high pressure in order to favor the removal of the two materials from the containers onto the slab to be coated. The two components are then mixed on the slab forming the putty suitable for coating slabs of marble, stone and the like.

Abstract: In civil engineering and construction engineering, surfaces are coated with a novel composition essentially consisting of a mixture made of (a) a principal ingredient including cement, silica sand, iron oxide, zinc oxide and glycine and (b) a composite polymer emulsion including carboxy-modified styrene-butadiene, cyclohexyl methacrylate, and styrene polymers, wherein the mixing ratio of said mixture is 2-6:1.

Abstract: A tire sealing and balancing composition comprising:1. Ethylene Glycol2. Water3. Sodium Dichromate4. Wetting Agents5. Washed Mica6. Shore Fiber Asbestos7. Long Fiber Asbestos8. A Cellulosic Thickener/Filler.

Abstract: The cooling system of automotive and other engines are permanently sealed by a cooling system sealant which will seal both small leaks caused by corrosion and large leaks caused by warped heads and blown head gaskets. The cooling system sealant comprises a major part of sodium silicate and minor parts of blue vitroil and gum of arabic. The cooling system sealant is added to the engine while running and with the coolant warmed.

Abstract: A composition comprising 100 parts of an elastomer selected from the group consisting of EPDM, butyl rubber and a EPDM-butyl rubber mixture; 0.1 to 3.0 parts of a compound having the structural formula [(CH.sub.2).sub.n NCS].sub.2 S.sub.6, where n is 4 or 5; and 0 to 0.5 parts of a sulfur donor curative is disclosed. The composition has particular application as roof sheeting or flashing.

Abstract: A stop-leak sealant composition for an internal combustion engine cooling system, hot water heating systems and the like consisting essentially of ginger rhizome flour, ground nut shells, boric acid, with or without additives to improve performance and more particularly with a fluorescent water-soluble leak detectng additive to detect leaks that cannot be stopped by the sealant composition.

Abstract: A container for storing a moisture-sensitive material which comprises a fillable space behind the moisture-sensitive material, which has contained therein a water-reactive, highly volatile silane, alkyl titanate or isocyanate which, upon reaction with water, produces a low-viscosity material which is water repellant. The water-reactive compound prevents contact of moisture with the moisture-sensitive material while it is in the container.

Abstract: The present invention relates to a nonhydrated bentonite intimately contacted with a polypropene, polybutene, or mixtures thereof to provide a formable and shapable non-aqueous bentonite composition particularly useful as a water barrier. The bentonite composition can be extruded in the form of a rope, rod, sheet or the like and is sufficiently tacky for adherence to a wall or conduit, floor or roof in areas of potential water flow to prevent the seepage of water through the bentonite composition. In one embodiment, the bentonite composition includes a polypropene and a polybutene and an elastomer, such as butyl rubber, having sufficient resilience to stretch or expand with the expanding bentonite upon hydration and to aid in maintaining the structural integrity and cohesiveness of the composition. In another embodiment, the composition comprises bentonite, an elastomer, and any plasticizer compatible with the elastomer.

Abstract: The present invention relates to a non-hydrated bentonite intimately contacted with a polypropene, polybutene, or mixtures thereof to provide a formable and shapable non-aqueous bentonite composition particularly useful as a water barrier. The bentonite composition can be extruded in the form of a rope, rod, sheet or the like and is sufficiently tacky for adherence to a wall or conduit, floor or roof in areas of potential water flow to prevent the seepage of water through the bentonite composition. In one embodiment, the bentonite composition includes a polypropene and a polybutene and an elastomer, such as butyl rubber, having sufficient resilience to stretch or expand with the expanding bentonite upon hydration and to aid in maintaining the structural integrity and cohesiveness of the composition. In another embodiment, the composition comprises bentonite, an elastomer, and any plasticizer compatible with the elastomer.

Abstract: A leak stopping composition for use in heat exchange systems comprising a dispersion of a fibrillated fiber in a liquid medium.

Abstract: A composition comprising 100 parts of an elastomer selected from the group consisting of EPDM, butyl rubber and a EPDM-butyl rubber mixture; 0.1 to 3.0 parts of a compound having the structural formula [(CH.sub.2).sub.n NCS].sub.2 S.sub.6, where n is 4 or 5; and 0 to 0.5 parts of a sulfur donor curative is disclosed. The composition has particular application as roof sheeting or flashing.

Abstract: A bentonite composition useful in preventing the flow of water through a structure to be waterproofed is disclosed. This composition comprises at least about 75% to 96% of a substantially unswelled bentonite and the remainder a film forming composition, said film forming composition comprising an organic binder that is solid at room temperature and is substantially unreactive with said bentonite. This bentonite is suspended substantially uniformly throughout said film forming composition to form thereby a substantially self-sustaining waterproofing element. The film forming composition contains an alkylphthalate present in from about 0.1% to 5% of said total composition.

Abstract: A stop leak composition for sealing leaks in refrigeration systems and method for using same. A mixture of smooth surfaced particles having a size small relative to the leak size is suspended in refrigeration oil and injected into the refrigerant circuit of a system. The particles will be forced into small leaks and will agglomerate to seal the leak. Graphite particles and Teflon.RTM. particles in size ranges from 20 microns to 65 mesh are suitable.

Abstract: A waterproofing composition for incorporation in the mixing water of plas or a plaster-based product, comprises, in an aqueous medium, at least one monomer silane which upon hydrolysis forms a silicone resin, said monomer silane having the general formula R.sub.x Si(OR').sub.n, in which formula R and R' are independently a lower alkyl radical having 1 to 4 carbon atoms or a phenyl radical, and in which x and n are integers or x is zero, the sum of x and n being 4, said composition also containing a dispersion of at least one insoluble fatty acid salt.

Abstract: Refrigeration fluid compositions for refrigeration and air-conditioning circuits include a usual refrigerant fluid together with a liquid, hydrolyzable organosilane which remains in the liquid phase throughout the air-conditioning circuit, and which is capable of removing moisture from the interior of the circuit and sealing leaks.

Abstract: Disclosed is a composition for stopping leaks which comprises the combination of a fibrillated fiber and a particulate material, such as a seed meal, in a suspension in a liquid medium. A preferred fibrillated fiber comprises the polymer, poly(imino-1,4-phenyleneiminoterephthaloyl).

Abstract: A heated chamber having at least one opening; closure means for closing said at least one opening, said closure means having at least a closed and open position; said closure means and said opening having surfaces disposed for coming into proximity of one another in said closed position, said surfaces forming a primary sealing means for said heated chamber in said closed position, there being a substance applied to at least one of said proximate surfaces, said substance having a property of expanding upon the application of heat thereby forming a secondary sealing means between said proximate surfaces in said closed position.

Abstract: Refrigeration fluid compositions for refrigeration and air conditioning circuits include a usual refrigerant fluid together with an organosilane monomer which is capable of sealing leaks in the circuit in both the vapor and liquid phases.

Abstract: A self-sealing pneumatic tire comprised of a cured rubber tire casing having a fitted, adherent sealant composite strip on its inner surface comprised of an admixture of (A) a partially crosslinked butyl type rubber, (B) plasticizer therefor, (C) butyl rubber-compatible tackifier and (D) particulate reinforcement.

Abstract: A stop-leak composition for an internal combustion cooling system, hot water heating systems and the like consisting essentially of ginger rhizome flour, ground nut shells, boric acid, sodium lignin sulfonate and magnesium stearate.

Abstract: Leaks in a vessel or pipeline or the like, adapted for containing a fluid, are sealed by means of a volatilized polymerizable organosilane comprising a mercaptosilane, an acyloxysilane, or an alkoxysilane taken on conjunction either with acetic acid anhydride or an amine, or mixtures thereof, the organosilane being supplied to the interior of the vessel or pipeline under sufficient pressure and for a sufficient period of time to permit contact and chemical reaction thereof in the presence of moisture or sand at the situs of the leak to provide a solid polysiloxane seal.

Abstract: A tire having a coating of a gelled non-volatile lubricating material disposed on at least the interior surface of the tread to facilitate relative movement between contacting portions of the interior surface of the tire when the tire is driven deflated. The coating is incapable of flowing away from the portion of the interior surface to which it is applied either under gravity or under the forces generated inside a tire during inflated running.