With Leak-stopping Agents Patents (Class 252/72)
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Patent number: 4238638Abstract: An electric cable having a core made of insulated conductors disposed within a polymeric sheath. Voids within the core, between the conductors, are at least partially filled in the unused cable with a mixture comprising untreated calcium carbonate and a water-attracting polymer able to form a gel on contact with water without swelling. The cables are made waterproof by the presence of the mixture, which is cheaper than prior mixtures but as effective.Type: GrantFiled: December 8, 1978Date of Patent: December 9, 1980Assignee: Phillips Cables Ltd.Inventors: Donald F. Cretney, John Howard
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Patent number: 4116895Abstract: Disclosed are a puncture sealant composition in emulsion for a tubeless pneumatic tire comprising a butyl rubber emulsion, a saturated hydrocarbon polymer emulsion, a crosslinking agent for the rubber and a crosslinking activator. A composition further containing a diene type unsaturated polymer emulsion and/or a natural rubber latex is also disclosed. These compositions are suitable for use in the production of a self-sealing vehicle tire.Type: GrantFiled: May 31, 1977Date of Patent: September 26, 1978Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kunio Kageyama, Mituharu Iwakura
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Patent number: 4116877Abstract: A fluid having a mineral lubricating oil base and containing the combination of an oil-soluble tris (C.sub.8 -C.sub.24 hydrocarbyl) phosphite ester and an oil-soluble C.sub.8 -C.sub.24 hydrocarbyl substituted phenol, the weight ratio of said phosphite to said phenol ranging from about 4:1 to 1:4, preferably 3:1 to 1:3 whereby elastomer compatibility of said fluid is enhanced. The phosphite ester-substituted phenol combination imparts to the fluid the property of maintaining the chemical and physical properties of seals under oxidizing condition in automatic transmissions, power transmissions and power steering systems and thereby improves retention of the fluid in these mechanical structures; preferably when at least an inhibitory amount of an anti-oxidant capable of trapping free radicals at temperatures above 65.degree. C., preferably 80 .degree. to 200.degree. C. is present.Type: GrantFiled: July 8, 1977Date of Patent: September 26, 1978Assignee: Exxon Research & Engineering Co.Inventors: Edward Francis Outten, Jack Ryer, John E. Williams
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Patent number: 4101494Abstract: A tire sealant composition which possesses the added ability of operating as a tire balancing composition is provided. Such composition comprises a fibrous component of asbestos fibers and a polyvinyl alcohol-containing liquid component. The composition has a viscosity of about 1000 to about 2200 cps at 100.degree. F.Type: GrantFiled: August 9, 1976Date of Patent: July 18, 1978Assignee: Wobaco Trust, Ltd. TrusteeInventors: Jerry B. Kent, Peter P. Augostini
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Patent number: 4058469Abstract: Compositions useful as lubricants and functional fluids comprise an oleaginous liquid of lubricating viscosity, typically a mineral oil, and an oxygen-, sulfur- or nitrogen-containing polyfunctional nitrile. The preferred nitriles are cyanoethylation products of alcohols, mercaptans and amines, and especially of alcohols. The polyfunctional nitrile serves as a seal swelling agent and/or demulsifier.Type: GrantFiled: December 5, 1975Date of Patent: November 15, 1977Assignee: The Lubrizol CorporationInventor: Donald Irvin Hoke
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Patent number: 4029587Abstract: Compositions useful as lubricants and functional fluids comprise an oleaginous liquid of lubricating viscosity, typically a mineral oil, and a 3-alkoxysulfolane or the like, in which the alkoxy group contains at least about 4 and preferably about 4-25 carbon atoms, as a seal swelling agent.Type: GrantFiled: June 23, 1975Date of Patent: June 14, 1977Assignee: The Lubrizol CorporationInventor: Frederick William Koch
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Patent number: 4029588Abstract: Substituted sulfolanes in which one of the substituents is a 3-alkoxy or 3-alkythio group, or the like, are useful for swelling seals in machinery (e.g., automatic transmissions) when dissolved in a functional fluid.Type: GrantFiled: June 23, 1975Date of Patent: June 14, 1977Assignee: The Lubrizol CorporationInventor: Frederick William Koch
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Patent number: 4010231Abstract: This invention relates to sealing small leaks in oil containers such as tankers, underground storage tanks, and the like, by plugging the orifice of the leak utilizing water-soluble polymers which have been dispersed in a water-in-oil emulsion wherein the oil is the continuous phase.The active sealant consists of small densely packed spheres of the water-soluble polymers which have an effective size of about 0.5-500 microns. The dosage on an oil-wet surface is about 3-15 percent based on the weight of the oil present and may alternatively be measured as about 10-1000 ppm of polymer spheres applied to the orifice.Type: GrantFiled: May 22, 1974Date of Patent: March 1, 1977Assignee: Nalco Chemical CompanyInventors: Kenneth G. Phillips, Alvin J. Frisque
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Patent number: 3996076Abstract: A process for quench hardening metal is provided. The process comprises heating the metal to a quench hardening temperature and thereafter immersing the metal in a quenching medium which is an aqueous solution containing 0.4 to 10% by weight of polyacrylic acid, polymethacrylic acid, a copolymer of acrylic acid and methacrylic acid, or a salt thereof. The process provides a perfect and uniformly hardened quenched structure and allows the production of a quenched structure having a desired degree of hardness.Type: GrantFiled: June 4, 1975Date of Patent: December 7, 1976Assignee: Toho Chemical Industry Co., Ltd.Inventors: Takashi Tokuue, Takashi Kato
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Patent number: 3984339Abstract: A hydraulic oil composition having a large Winslow effect containing an electrical insulating oil, a water-soluble electrolyte, a liquid having a high dielectric constant, and microcrystalline cellulose particles.Type: GrantFiled: October 5, 1973Date of Patent: October 5, 1976Assignee: FMC CorporationInventors: Kimihiko Takeo, Yukikazu Omura
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Patent number: 3984507Abstract: A method for stopping leaks in closed cooling systems by adding thereto a finely divided acrylamide polymer.Type: GrantFiled: November 25, 1974Date of Patent: October 5, 1976Assignee: Nalco Chemical CompanyInventor: Robert A. Miller
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Patent number: 3962105Abstract: Lubricating compositions containing seal swelling additives based upon certain diesters and/or ester lactones are disclosed.Type: GrantFiled: March 25, 1975Date of Patent: June 8, 1976Assignee: The Lubrizol CorporationInventor: Richard Michael Lange
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Patent number: 3947610Abstract: Leaks in closed cooling systems containing an aqueous medium as the coolant, are sealed by electroless deposition of a metal or metal containing compound from a water soluble, easily reducible metal compound. A complexing agent may be added to the coolant to assist in solubilizing the easily reducible metal compound. In one embodiment, the reducible metal compound is formed in situ by attacking the conduit walls of the cooling system so as to form solubilized compounds, or compounds which can be solubilized by addition of suitable complexing agents.Type: GrantFiled: August 7, 1974Date of Patent: March 30, 1976Assignee: BBC Brown, Boveri & Company LimitedInventors: Maurice Bodmer, Edmund Hartinger, Albert Huber
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Patent number: 3939082Abstract: An improved gel-thickened lubricant, useful as a gear oil or as an antileak hydraulic oil, comprises an effective amount of a lithium soap (e.g., 0.1 to 1 percent lithium stearate) or an aluminum soap (e.g., 0.5 to 2 percent aluminum stearate), or mixtures of such soaps, and a base oil having a viscosity in the range of 70 to about 3,000 SUS at 100.degree.F (preferably with an aniline point in the range of 150.degree. to 170.degree.F when the oil is to be in contact with Buna N, etc., rubbers), said base oil comprising at least one hydrorefined naphthenic oil or a hydrocracked paraffinic oil having a viscosity in the range of 40 to 12,000 SUS at 100.degree.F. Preferably, the base oil comprises a major amount of the hydrorefined naphthenic oil and a minor amount of a solvent refined paraffinic lube, or a hydrocracked lube with a paraffinic VGC, or a bright stock, or a mixture of two or more such oils.Type: GrantFiled: June 10, 1974Date of Patent: February 17, 1976Assignee: Sun Oil Company of PennsylvaniaInventors: Edward S. Williams, William H. Reiland, John Q. Griffith, III
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Patent number: 3933663Abstract: An improved method of transmitting power in a hydraulically operated mechanism which comprises adding to the operative liquid a certain amount of a tertiary diamide having the following structural formula: ##EQU1## wherein ##EQU2## and wherein R R H, alkyl radical having C.sub.1 -C.sub.5m = 2-8x = 1-5The tertiary diamide imparts to the liquid the property of swelling seals in the mechanical system and thereby prevents leakage.Type: GrantFiled: December 10, 1973Date of Patent: January 20, 1976Assignee: Sun Ventures, Inc.Inventors: Robert M. Thompson, Francois E. Didot