Aluminum Or Zinc In The Inorganic Compound Patents (Class 508/172)
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Publication number: 20090048129Abstract: To provide a nanoparticle-containing lubricating oil composition which demonstrates a low friction coefficient and realizes a further fuel economy. A nanoparticle-containing lubricating oil composition comprising a base oil, an additive having hydroxyl group, and nanoparticle. A nanoparticle-containing lubricating oil composition comprising a base oil, an ashless friction modifier having hydroxyl group, and nanoparticle. A nanoparticle-containing lubricating oil composition comprising a base oil, an additive having hydroxyl group, and nanoparticle having a particle diameter of 1 to 100 nm. A nanoparticle-containing lubricating oil composition comprising a base oil, an ashless friction modifier having hydroxyl group, and nanoparticle having a particle diameter of 1 to 100 nm.Type: ApplicationFiled: August 7, 2008Publication date: February 19, 2009Inventors: Yutaka Mabuchi, Akira Nakagawa
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Publication number: 20090042751Abstract: A combination nano and microparticle treatment for engines enhances fuel efficiency and life duration and reduces exhaust emissions. The nanoparticles are chosen from a class of hard materials, preferably alumina, silica, ceria, titania, diamond, cubic boron nitride, and molybdenum oxide. The microparticles are chosen from a class of materials of layered structures, preferably graphite, hexagonal boron nitride, magnesium silicates (talc) and molybdenum disulphide. The nano-micro combination can be chosen from the same materials. This group of materials includes zinc oxide, copper oxide, molybdenum oxide, graphite, talc, and hexagonal boron nitride. The ratio of nano to micro in the proposed combination varies with the engine characteristics and driving conditions. A laser synthesis method can be used to disperse nanoparticles in engine oil or other compatible medium.Type: ApplicationFiled: November 5, 2007Publication date: February 12, 2009Inventor: Jagdish Narayan
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Publication number: 20090005272Abstract: The present invention provides a grease composition capable of effectively preventing a rolling surface from having hydrogen brittleness-caused peeling, a grease-enclosed bearing in which the grease composition is enclosed, and a one-way clutch in which the grease composition is enclosed at a sliding portion. The grease composition contains a base grease consisting of a base oil and a thickener and an additive added to the base grease. The grease composition is capable of preventing hydrogen brittleness-caused peeling from occurring on a frictionally worn surface of a bearing portion containing an iron-based metal material or a newly generated surface consisting of the iron-based metal material exposed owing to wear. The additive contains at least one aluminum-based additive selected from among an aluminum powder and inorganic aluminum compounds. The mixing ratio of the aluminum-based additive to 100 parts by weight of the base grease is set to 0.05 to 10 parts by weight.Type: ApplicationFiled: February 15, 2007Publication date: January 1, 2009Applicant: NTN CORPORATIONInventors: Hidenobu Mikami, Takayuki Kawamura
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Publication number: 20080312111Abstract: A composition that includes solid lubricant nanoparticles and an organic medium is disclosed. Also disclosed are nanoparticles that include layered materials. A method of producing a nanoparticle by milling layered materials is provided. Also disclosed is a method of making a lubricant, the method including milling layered materials to form nanoparticles and incorporating the nanoparticles into a base to form a lubricant.Type: ApplicationFiled: January 12, 2007Publication date: December 18, 2008Inventors: Ajay P. Malshe, Arpana Verma
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Publication number: 20080145554Abstract: A method of making a thermal spray powder is provided. The method comprises: providing a powder comprising a plurality of porous particles; infiltrating a mixture comprising a solvent and a plurality of solid lubricant particles into the porous particles; and heating the powder to a temperature sufficient to evaporate the solvent. The method of forming a wear-resistant coating is provided. The method comprises: providing a thermal spray powder; heating the thermal spray powder; and accelerating the thermal spray powder from a thermal spray gun onto the substrate, to form a deposit. Yet another embodiment provides a wear resistant coating. The wear resistant coating is formed by thermally spraying the thermal spray powder.Type: ApplicationFiled: December 14, 2006Publication date: June 19, 2008Applicant: GENERAL ELECTRICInventors: Farshad Ghasripoor, Todd Charles Curtis, Dennis Michael Gray
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Patent number: 7381690Abstract: An aqueous slurry composition for lapping, saw wire cutting, and finishing operations which contains about 0.1 to 70% by weight of abrasive particles, 0.1 to 20% by weight of suspending particles that have a density of less than or similar to the aqueous or semi-aqueous carrier medium, and the method for creating the suspension.Type: GrantFiled: September 25, 2003Date of Patent: June 3, 2008Assignee: PPT Research IncInventors: Deliang Ding, Jesse Leaymen, Irl E. Ward
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Patent number: 7381346Abstract: A thermal interface material is for being applied to the contact surfaces to eliminate the air interstices between the heat dissipating apparatus and the electronic component in order to improve heat dissipation of the electronic component. The thermal interface material includes pentaerythritol oleate as base oil and fillers filled in the pentaerythritol oleate for improving the heat conductivity of the thermal interface material. The pentaerythritol oleate is used for holding the fillers therein and filling the air interstices to achieve an intimate contact between the heat dissipating apparatus and the electronic component. The fillers include aluminum powders, zinc oxide powders and zinc oxide nano-particles.Type: GrantFiled: September 15, 2006Date of Patent: June 3, 2008Assignee: Foxconn Technology Co., Ltd.Inventors: Ching-Tai Cheng, Nien-Tien Cheng
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Patent number: 7375060Abstract: The object of the present invention is to provide a protective metal-ceramic film having a heterogeneous structure and possessing higher density, wear resistance, a high adhesion to a friction surface and a friction coefficient after running in not higher than 0.03-0.07. The above object is solved by providing a plating concentrate comprising a powdered metallic filler, surfactants, oil soluble dialkyl dithiophosphoric acid metal salts and a basic oil, a mineral filler based on silicates and cyclohexanol at the following ratio of components in % by weight: a powdered metallic filler 0.05-20.0 surfactants ?0.5-11.0 dialkyl dithiophosphoric acid metal salts ?1.0-45.0 a mineral filler based on silicates ?1.2-20.0 cyclohexanol 0.05-2.0? A mineral filler based on silicates comprises natural minerals from a series of layered hydro silicates such as serpentinite and/or chlorite.Type: GrantFiled: January 21, 2005Date of Patent: May 20, 2008Assignee: VMPAUTOInventors: Vasily Nikolaevich Kuzmin, Leongard Ivanovich Pogodaev
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Patent number: 7358216Abstract: A process is disclosed for manufacturing a lubricant composition comprising combining a superabsorbent polymer with a material for decreasing friction between moving surfaces. The superabsorbent polymer absorbs from about 25 to greater than 100 times its weight in water and may comprise a polymer of acrylic acid, an acrylic ester, acrylonitrile or acrylamide, including co-polymers thereof or starch graft co-polymers thereof or mixtures thereof. A product produced by the process includes the material for decreasing friction comprising a petroleum lubricant containing an additive, water containing an additive, synthetic lubricant, grease, solid lubricant or metal working lubricant, wherein the synthetic lubricant, grease, solid lubricant or metal working lubricant optionally contain an additive. A process comprising controlling the delivery of a lubricant to at least one of two moving surfaces in order to decrease friction between said moving surfaces, is also disclosed.Type: GrantFiled: December 11, 2003Date of Patent: April 15, 2008Assignee: Lee County Mosquito Control DistrictInventor: Richard Levy
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Patent number: 7338926Abstract: A process is disclosed for manufacturing a lubricant composition comprising combining a superabsorbent polymer with a material for decreasing friction between moving surfaces. The superabsorbent polymer absorbs from about 25 to greater than 100 times its weight in water and may comprise a polymer of acrylic acid, an acrylic ester, acrylonitrile or acrylamide, including co-polymers thereof or starch graft co-polymers thereof or mixtures thereof. A product produced by the process includes the material for decreasing friction comprising a petroleum lubricant containing an additive, water containing an additive, synthetic lubricant, grease, solid lubricant or metal working lubricant, wherein the synthetic lubricant, grease, solid lubricant or metal working lubricant optionally contain an additive. A process comprising controlling the delivery of a lubricant to at least one of two moving surfaces in order to decrease friction between said moving surfaces, is also disclosed.Type: GrantFiled: February 18, 2004Date of Patent: March 4, 2008Assignee: Lee County Mosquito Control DistrictInventor: Richard Levy
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Publication number: 20080004191Abstract: A thermal conductive grease used for diffusion of heat generated in electronic appliances is provided. The thermal conductive grease comprises: (A) a base oil having a viscosity of 112 to 770 mm2 at 40° C. and comprising a copolymer of an unsaturated dicarboxylic acid dibutyl ester and an ?-olefin; and (B) a thermal conductive filler filled in the base oil. The thermal conductive grease does not include conventionally used silicone oil so that insulating substances will not be formed in the thermal conductive grease.Type: ApplicationFiled: June 29, 2006Publication date: January 3, 2008Inventor: Tsukasa Ishigaki
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Patent number: 7160631Abstract: The present invention provides for a zinc-based coated steel sheet having a zinc-based coating layer and a lubricant film, which is formed on the zinc-based coating layer, containing zinc phosphate particles in an amount of 50 wt. % or more, and having substantially no reaction layer formed by reaction between the zinc-based coating and the zinc phosphate particles, and a method for the manufacture thereof. The zinc-based coated steel sheet according to the present invention has an excellent anti-peeling property, excellent frictional property, even in the non-lubricated condition which occurs at areas where the press oil film is broken, and excellent anti-galling property.Type: GrantFiled: October 23, 2002Date of Patent: January 9, 2007Assignee: JFE Steel CorporationInventors: Seiji Nakajima, Tomokatsu Katagiri, Yoichi Tobiyama, Chiaki Kato
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Patent number: 6900163Abstract: A thermal interface material including a compound which has high thermal conductivity, is dry-to-the-touch, but naturally tacky, and may be formed into various shapes, such as sheets and blocks, to serve as a heat transfer material for electronic components. The compound includes a pre-blend of a polyol ester and an antioxidant, a boron nitride filler, a high viscosity oil, and either a solvent, a surfactant, and a polystyrene-based polymer, or aluminum silicate. A method for using the compound includes the steps of providing a heat generating electronic component with a first surface; providing a heat dissipating component with a second surface with which the first surface is to interface; and disposing the compound between the respective surfaces to effectuate efficient heat transfer therebetween. Further, a removable liner can be applied to an exposed surface of the compound.Type: GrantFiled: July 3, 2003Date of Patent: May 31, 2005Assignee: AOS Thermal CompoundsInventor: Prakash Khatri
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Patent number: 6818600Abstract: To provide a highly reliable heat-dissipating silicone grease composition having stable thermoconductive properties over a long period of time, which does not exude oil, and which does not lead to contact defects. The heat-dissipating silicone grease composition, comprising: (A) 100 weight parts of an organopolysiloxane having a thixotropicity degree &agr; of 1.03-1.50 and a viscosity at 25° C. of 100-1,000,000 mm2/s, and (B) 100-2,000 weight parts of a thermoconductive inorganic filler having an) average particle diameter of 0.1-100 micrometers.Type: GrantFiled: April 9, 2003Date of Patent: November 16, 2004Assignees: Shin-Etsu Chemical Co. Ltd., Denso CorporationInventors: Kunihiro Yamada, Osamu Uchida
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Publication number: 20040097381Abstract: This invention relates to a thickener component based on an aluminium carboxylate compound and to an aluminium complex grease made therefrom with addition of a base liquid.Type: ApplicationFiled: February 3, 2003Publication date: May 20, 2004Inventors: Peter Finmans, Christina Diblitz, Frank Allmuller, Detlef Hoell
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Publication number: 20040018945Abstract: A thermal interface material including a compound which has high thermal conductivity, is dry-to-the-touch, but naturally tacky, and may be formed into various shapes, such as sheets and blocks, to serve as a heat transfer material for electronic components. The compound includes a pre-blend of a polyol ester and an antioxidant, a boron nitride filler, a high viscosity oil, and either a solvent, a surfactant, and a polystyrene-based polymer, or aluminum silicate. A method for using the compound includes the steps of providing a heat generating electronic component with a first surface; providing a heat dissipating component with a second surface with which the first surface is to interface; and disposing the compound between the respective surfaces to effectuate efficient heat transfer therebetween. Further, a removable liner can be applied to an exposed surface of the compound.Type: ApplicationFiled: July 3, 2003Publication date: January 29, 2004Applicant: AOS Thermal CompoundsInventor: Prakash Khatri
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Patent number: 6632780Abstract: There are provided a highly thermal conductive grease composition having both a thermal conductivity and a satisfactory dispense property, and a cooling device applied with same. The grease composition comprises from 70 to 90% by volume of an inorganic powder which is a mixture containing at least two kinds of inorganic powders different from each other in each average particle size, and from 10 to 30% by volume of a base oil containing a mineral oil or a synthetic oil, the base oil further containing a surfactant in an amount of from 0.2 to 2.0% by weight based on the weight of the inorganic powder.Type: GrantFiled: March 5, 2001Date of Patent: October 14, 2003Assignee: Hitachi, Ltd.Inventors: Takao Uematsu, Yutaka Ito, Takahiro Daikoku, Akio Idei, Akihiro Yasuda
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Patent number: 6610635Abstract: A thermal interface material including a compound which has high thermal conductivity, is dry-to-the-touch, but naturally tacky, and may be formed into various shapes, such as sheets and blocks, to serve as a heat transfer material for electronic components. The compound includes a pre-blend of a polyol ester and an antioxidant, a filler(s), a high viscosity oil, and either a solvent, a surfactant, and a polystyrene-based polymer, or aluminum silicate. A method for using the compound includes the steps of providing a heat generating electronic component with a first surface; providing a heat dissipating component with a second surface with which the first surface is to interface; and disposing the compound between the respective surfaces to effectuate efficient heat transfer therebetween. Further, the compound can be applied alone, e.g.Type: GrantFiled: September 14, 2001Date of Patent: August 26, 2003Assignee: AOS Thermal CompoundsInventor: Prakash Khatri
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Publication number: 20030119681Abstract: An anti-seize composition which is non-flowable and dimensionally stable at temperatures greater than about 120° F. and dispensable at room temperature without the application of heat is provided. The composition includes a solid anti-seize lubricant, such as of metallic copper, metallic nickel, metallic aluminum, metallic lead, metallic zinc, graphite, calcium oxide, calcium carbonate, calcium fluoride, calcium stearate, lithium, molybdenum disulfide, boron nitride, barium sulfate, or combinations thereof. The anti-seize lubricant is dispersed in a carrier which is a solid at about room temperature. The carrier includes a grease with an ASTM D 217 penetration at 25° C. from about 200 to about 400 mm, a matrix material, and a naphthenic petroleum oil having a viscosity of less than about 300 SUS at 100° F. and having an API gravity at 60° F. from about 23 to about 25. The matrix material is a polymeric material. Optionally, a refined petroleum wax may also be included.Type: ApplicationFiled: October 29, 2002Publication date: June 26, 2003Applicant: HENKEL LOCTITE CORPORATIONInventors: Prakash S. Patel, Shabbir Attarwala
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Publication number: 20030087768Abstract: A lubricating grease composition contains a major amount of lubricating base oil, at least one thickener and at least one agent for reducing the coefficient of friction. The agent for reducing the coefficient of friction comprises a metal oxide that has a specific surface area of at least 100 m2/g and that is selected from the group consisting of titanium oxide, silicon dioxide, aluminum oxide and tin dioxide.Type: ApplicationFiled: October 23, 2002Publication date: May 8, 2003Inventors: Jurgen Florchinger, Karsten Scholer
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Patent number: 6548454Abstract: The present invention provides a rolling apparatus comprising a movable member which can undergo rotary or linear motion, a support member which carries the movable member, rolling elements which are interposed between the movable member and the support member and which roll with the movement of the movable member, and a lubricant composition which is disposed between the movable member on which the rolling elements roll and the support member, wherein the lubricant composition is a mixture of (1) a thickening agent which is at least one selected from the group consisting of a solid fluoropolymer, a lamellar mineral powder, an ultrafinely particulate organic material, an organic solid lubricant and an ultrafinely particulate inorganic material, and (2) a base oil comprising a liquid fluorinated polymer oil.Type: GrantFiled: August 28, 1998Date of Patent: April 15, 2003Assignee: NSK Ltd.Inventors: Toyohisa Yamamoto, Atsuhiro Yamamoto, Atsushi Yokouchi
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Patent number: 6475962Abstract: A heat sink material for use in electronic assemblies is disclosed. The heat sink material is a thermal grease that due its composition is dry to the touch and thus eliminates the problems associated with thermal greases in electronic assemblies.Type: GrantFiled: September 14, 2000Date of Patent: November 5, 2002Assignee: AOS Thermal Compounds, LLCInventor: Prakash Khatri
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Publication number: 20020086801Abstract: A thermal interface material including a compound which has high thermal conductivity, is dry-to-the-touch, but naturally tacky, and may be formed into various shapes, such as sheets and blocks, to serve as a heat transfer material for electronic components. The compound includes a pre-blend of a polyol ester and an antioxidant, a filler(s), a high viscosity oil, and either a solvent, a surfactant, and a polystyrene-based polymer, or aluminum silicate. A method for using the compound includes the steps of providing a heat generating electronic component with a first surface; providing a heat dissipating component with a second surface with which the first surface is to interface; and disposing the compound between the respective surfaces to effectuate efficient heat transfer therebetween. Further, the compound can be applied alone, e.g.Type: ApplicationFiled: September 14, 2001Publication date: July 4, 2002Inventor: Prakash Khatri
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Patent number: 6372337Abstract: A grease composition having high thermal conductivity and excellent dispensation suitability, comprising (A) 100 parts by weight of a base oil and (B) 500 to 1,200 parts by weight of metallic aluminum powder having the average particle size in the range of 0.5-50 &mgr;m; wherein the aluminum powder is a mixture of fine metallic aluminum powder having an average size of 0.5 to 5 &mgr;m and coarse metallic aluminum powder having an average particle size of 10 to 40 &mgr;m; and a semiconductor device utilizing the aforesaid grease composition.Type: GrantFiled: May 26, 1999Date of Patent: April 16, 2002Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Takayuki Takahashi, Kunihiro Yamada, Kenichi Isobe
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Patent number: 6333376Abstract: The plastic ski coating contains a filling material addition improving the sliding properties, which contains at least one of the following materials: boron, at least one boron compound, at least one nitride. With this the filling material addition quantity may be smaller than with a filling material addition of soot or graphite, and a black coloration of the ski coating may be avoided.Type: GrantFiled: May 15, 2000Date of Patent: December 25, 2001Assignee: IMS Kunststoff AGInventor: Urs Geissbuhler
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Patent number: 6255257Abstract: A silicone grease composition having high thermal conductivity, comprising (A) 50 to 95 weight % of a mixture of an aluminum nitride powder &agr; having an average particle size of 0.5 to 5 &mgr;m and an aluminum nitride powder &bgr; having an average particle size of 6 to 20 &mgr;m, wherein the aluminum nitride powders &agr; and &bgr; are mixed so that the &agr;/(&agr;+&bgr;) ratio by weight is from 0.1 to 0.9 and the average particle size after mixing is from 1 to 10 &mgr;m, (B) 5 to 15 weight % of organopolysiloxanes having a viscosity of from 50 to 50,000 cs at 25° C. and represented by formula R1aSiO(4−a)/2, wherein R1 represents at least one group selected from saturated or unsaturated univalent hydrocarbon groups containing 1 to 18 carbon atoms and 1.8≦a≦2.2, and (C) 0 to 35 weight % of at least one inorganic compound powder having an average particle size of 0.5 to 100 &mgr;m selected from the group consisting of zinc oxide, alumina, boron nitride and silicon carbide powders.Type: GrantFiled: December 2, 1999Date of Patent: July 3, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kunihiro Yamada, Takayuki Takahashi, Kenichi Isobe
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Patent number: 6174841Abstract: A heat-reducing silicone grease composition comprising a mixture of (A) 50-95 weight % of aluminum nitride powder having an average particle size of 0.5-10 &mgr;m and containing no particles 100 &mgr;m or greater in size, (B) 5-50 weight % of liquid silicone having a viscosity of 50-500,000 cs at 25° C. and (C) 0-30 weight % of at least one powder selected from the group consisting of zinc oxide, alumina, boron nitride and silicon carbide powders; and a semiconductor device to which the foregoing silicone grease composition is applied.Type: GrantFiled: October 1, 1999Date of Patent: January 16, 2001Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kunihiro Yamada, Kenichi Isobe, Takayuki Takahashi
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Patent number: 6159910Abstract: An aluminum nitride composition including an aluminum nitride powder and an aromatic amine-based condensate is provided. In the composition, the aluminum nitride may hardly undergo decomposition even under severe conditions of high temperature and high humidity, and the electrical insulating properties and high thermal conductivity inherent in aluminum nitride powder can be maintained under such severe conditions. Accordingly, this composition is useful as a durable heat-dissipating composition, in particular, as a heat-dissipating coating material, grease or sheet.Type: GrantFiled: June 1, 1999Date of Patent: December 12, 2000Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Toshihide Shimizu, Mikio Watanabe, Tamaki Iida
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Patent number: 6136758Abstract: An aluminum nitride powder having the surface treated with an organosilane represented by formula, R.sup.I.sub.a R.sup.II.sub.b SiY.sub.4-1-b, and/or a partial hydrolysis condensate thereof to acquire excellent moisture-proof, wherein R.sup.I represents a 6-20C alkyl group or a group formed by substituting halogen atom or atoms for part or all of the hydrogen atoms attached to carbon atoms of the 6-20C alkyl group, R.sup.Type: GrantFiled: December 11, 1998Date of Patent: October 24, 2000Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kunihiro Yamada, Takayuki Takahashi, Kenichi Isobe
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Patent number: 6015777Abstract: Low bleed silicone grease compositions are prepared by blending high viscosity silicone oils with filler materials and/or silicone elastomers. Greases comprise three main types: I) grease comprising high viscosity silicone oil and filler material, II) grease comprising high viscosity silicone oil and silicone elastomer, and III) grease comprising high molecular weight silicone oil and filler material and silicone elastomer.Type: GrantFiled: April 15, 1998Date of Patent: January 18, 2000Assignee: University of ConnecticutInventors: Richard T. Lostritto, Jr., Joseph H. Groeger
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Patent number: 5981641Abstract: Provided are a thermally conductive silicone composition, a thermally conductive material and a thermally conductive silicone grease, wherein a liquid silicone, an aluminum nitride powder and a zinc oxide powder are comprised, and wherein the total amount of those powders are from 500 to 1,000 parts by weight per 100 parts by weight of the liquid silicone and the ratio of the zinc oxide powder to the sum total of the aluminum nitride powder and the zinc oxide powder is from 0.05 to 0.5 by weight.Type: GrantFiled: August 8, 1997Date of Patent: November 9, 1999Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Takayuki Takahashi, Masahiko Minemura, Takashi Ohkawara
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Patent number: 5977033Abstract: The present invention relates to particle agglomeration of aluminum powder using a lubricating binder. The resulting powder has improved flowability and can be shaped easily. The aluminum particles are admixed with a lubricant, e.g. polyethylene, and are held together by the lubricant. To agglomerate the aluminum powder, the lubricant is melted and is then solidified to form solid bridges between the aluminum powder particles. The lubricant may be burned out cleanly at temperatures lower than 450.degree. C.Type: GrantFiled: August 5, 1998Date of Patent: November 2, 1999Assignee: National Research Council of CanadaInventors: Louis-Philippe Lefebvre, Yannig Thomas, Sylvain Pelletier
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Patent number: 5840666Abstract: A grease composition comprising a base oil, a thickener selected from a metallic soap and a urea compound, and an inorganic filler having an average particle size of not greater than 2 .mu.m, and a rolling bearing having sealed therein a grease composition comprising a base oil, a urea thickener, and an inorganic filler having an average particle size of not greater than 2 .mu.m.Type: GrantFiled: December 20, 1996Date of Patent: November 24, 1998Assignee: NSK Ltd.Inventors: Atsushi Yokouchi, Hideki Koizumi, Kenichi Iso, Michiharu Naka
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Patent number: 5624887Abstract: Multilayered sliding members made of a lubricating composition containing polytetrafluoroethylene and 1 to 40 wt % of zinc oxide whiskers as a filler; and a porous sintered metal layer formed on a steel backing are disclosed, in which the lubricating composition is impregnated in and coated on the porous sintered metal layer.Type: GrantFiled: January 30, 1995Date of Patent: April 29, 1997Assignee: Oiles CorporationInventors: Takashi Nakamaru, Tadashi Watai, Akihiko Okimura, Sumihide Yanase