Containing At Least Two Organic Materials, E.g., Binder Plus Other Organic Material, Etc. Patents (Class 523/156)
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Patent number: 6110991Abstract: Dry processed friction materials are disclosed wherein the components thereof include dry blends of a) fibrillated, organic, synthetic polymer, b) organic, synthetic polymer staple and c) organic, synthetic soluble polymer particles.Type: GrantFiled: June 17, 1997Date of Patent: August 29, 2000Assignee: Sterling Chemicals, International, Inc.Inventors: Stanley Sigmund Kaminski, Robert Ellsworth Evans
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Patent number: 6107386Abstract: A friction material comprising a filler, a binder, and a lubricant, wherein a part or the whole of the filler is constituted by molybdenum trioxide. Not only is the friction material improved in anti-cracking property and anti-fading property under high-temperature and high-load conditions, but the friction material can be prevented from deterioration due to ashing.Type: GrantFiled: February 21, 1995Date of Patent: August 22, 2000Assignee: Akebono Brake Industry Co., Ltd.Inventors: Osamu Nakajima, Takashi Kudo
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Patent number: 6080230Abstract: In a friction material composition containing a fiber base, and a binder, a novolak type phenolic resin having a mean molecular weight of from 3500 to 5000 is used as the binder.Type: GrantFiled: November 13, 1998Date of Patent: June 27, 2000Assignee: Akebono Brake Industry Co., Ltd.Inventors: Yosuke Sasaki, Michinori Yanagi, Yuzo Todani, Tadahiro Mita
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Patent number: 6060536Abstract: In a method of producing a wet friction material according to the present invention, a water soluble material is dispersed into a raw paper including a fibrous base material, a filler, and a friction adjusting agent. Then, the raw paper is passed through water to dissolve the water soluble material to provide porosity. Thereafter, the raw paper is immersed with thermosetting resin, and heated and hardened to thereby produce a wet friction material.Type: GrantFiled: July 21, 1997Date of Patent: May 9, 2000Assignee: NSK-Warner Kabushiki KaishaInventors: Takayuki Matsumoto, Shigeki Umezawa
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Patent number: 6013696Abstract: A method for manufacturing a heat resistant friction material which comprises forming pores in the surface of the friction material, the pores being formed with a controlled pore size, depth, pattern, orientation and distribution.Type: GrantFiled: January 22, 1998Date of Patent: January 11, 2000Assignee: The Mead CorporationInventors: Larry Oather Hill, Richard S. Goodlin, Christopher Roy Mathews, Mahendra Mehta
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Patent number: 5977196Abstract: A sealer and inflator composition, particularly for inflating tires. The composition comprises: a sealant; a non-flammable propellant/inflator having an ozone depletion potential of zero; and a vapor pressure depressant which may be either hydrocarbon diethers of 3 to 6 carbon atoms, hydroxyketones of 3 to 6 carbon atoms, or mixtures thereof.Type: GrantFiled: December 15, 1998Date of Patent: November 2, 1999Assignee: Gold Eagle Co.Inventor: Robert T. Wicks
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Patent number: 5965658Abstract: The instant invention provides a non-asbestos friction material and method of making therefor having from about 2 to 20 wt % of carbonaceous fibers. The remainder of the friction material is an auxiliary material and a thermosetting resin. The carbonaceous fibers are derived from oxidized polyacrylonitrile based fibers. The wt % of bond carbon in the carbonaceous fibers is about 65 to 80.Type: GrantFiled: November 12, 1996Date of Patent: October 12, 1999Assignee: R.K Carbon Fibers Inc.Inventors: W. Novis Smith, Philip Boyd
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Patent number: 5919837Abstract: Wet processed friction materials are disclosed wherein the components thereof include blends of a) fibrillated, organic, synthetic polymer, b) organic, synthetic polymer staple and c) organic, synthetic soluble polymer particles.Type: GrantFiled: June 17, 1997Date of Patent: July 6, 1999Assignee: Sterling Chemicals International, Inc.Inventors: Stanley Sigmund Kaminski, Robert Ellsworth Evans
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Patent number: 5889082Abstract: A method for producing wet processed friction materials are disclosed wherein the components thereof include blends of a) fibrillated, organic, synthetic polymer, b) organic, synthetic polymer staple and c) organic, synthetic soluble polymer particles.Type: GrantFiled: June 17, 1997Date of Patent: March 30, 1999Assignee: Sterling Chemicals International, Inc.Inventors: Stanley Sigmund Kaminski, Robert Ellsworth Evans
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Patent number: 5889080Abstract: A method for making a dry blend for use in the preparation of a friction material, a dry blend per se and dry friction materials is disclosed wherein the components thereof include a) fibrillated, organic, synthetic polymer, b) organic, synthetic polymer staple and c) organic, synthetic soluble polymer particles.Type: GrantFiled: June 13, 1997Date of Patent: March 30, 1999Assignee: Sterling Chemicals International, Inc.Inventors: Stanley Sigmund Kaminski, Robert Ellsworth Evans
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Patent number: 5889081Abstract: This invention provides: (1) a hinder composition for friction materials, characterized in that it comprises a thermosetting resin and a specific organic silicon compound having phenyl groups, and (2) a friction material having as a binder composition shown in the above item (1). When used for manufacturing friction materials in the brakes and clutches for various kinds of vehicles such as automobiles, it can remarkably improve the facing and abrasion resistances of the friction material.Type: GrantFiled: January 17, 1996Date of Patent: March 30, 1999Assignee: Osaka Gas Company LimitedInventors: Hiroya Kakegawa, Tokugen Yasuda, Xiangsheng Wang
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Patent number: 5821282Abstract: A self lubricating material for use in a castable material from which a predetermined component having at least one friction surface is to be manufactured. Such self lubricating type material consisting essentially of cellulose in the range of between about 4.0 weight percent and about 9.0 weight percent, resin in the range of between about 15.0 weight percent and about 20.0 weight percent, vermiculite in the range of between about 20.0 weight percent and about 25.0 weight percent, nut shells in a range of between about 12.0 weight percent and about 20.0 weight percent, fluorspar in a range of between about 11.0 weight percent and about 14.0 weight percent and oil in the range of between about 20.0 weight percent and about 26.0 weight percent.Type: GrantFiled: October 26, 1995Date of Patent: October 13, 1998Assignee: Westinghouse Air Brake CompanyInventor: Joseph F. Formolo
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Patent number: 5817411Abstract: A friction material comprises: a thermosetting resin binder; an organic fiber; a non-asbestos inorganic fiber; a filler; and an organic resin coating formed on a scorched surface of the friction material.Type: GrantFiled: March 11, 1997Date of Patent: October 6, 1998Assignee: Akebono Brake Industry Co., Ltd.Inventor: Osamu Nakajima
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Patent number: 5811042Abstract: A composite friction or gasketting material is disclosed having a combination of thermoset or thermo-plastic matrix resin, fiber reinforcing material, and aramid particles. The composite material exhibits improved wear resistance when compared with materials having no aramid particles.Type: GrantFiled: May 24, 1995Date of Patent: September 22, 1998Assignee: E. I. du Pont de Nemours and CompanyInventor: David Eldon Hoiness
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Patent number: 5753018Abstract: An improved friction material composite is disclosed that contains a fibrous reinforcing constituent, various friction imparting and controlling additives, and a thermosetting resin mixture in which mixture is contained pitch, a polyimide resin, and optionally a phenolic resin. Pitch-polyimide mixtures can be formulated to provide unusually high temperature resistance and strength and the pitch-polyimide-phenolic resin mixtures formulated to provide like properties at moderate cost.Type: GrantFiled: April 14, 1997Date of Patent: May 19, 1998Assignee: General Motors CorporationInventors: Robert Anthony Lamport, Julie Mary Biermann-Weaver, Vinod Kumar Jain, Peter Teh-Kwang Shih
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Patent number: 5712314Abstract: A resin composition useful in well completion and remedial methods having improved flexibility upon setting or curing is disclosed. The resin composition includes a polymerizable resin, an oil soluble acid catalyst capable of causing polymerization of the resin at formation temperatures, and 10 to 70% by volume rubber. The rubber may be in the form of ground rubber or an aqueous dispersion or emulsion. Also disclosed are methods for the use of the resin composition in well completion and remediation.Type: GrantFiled: August 9, 1996Date of Patent: January 27, 1998Assignee: Texaco Inc.Inventors: Billy Wayne Surles, Philip Daniel Fader
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Patent number: 5676577Abstract: The present invention relates to a fibrous base material comprising fibrillated aramid fibers, cellulose fibers, and at least one type of filler material and a non-asbestos friction material produced therefrom by impregnating the fibrous base material with a phenolic or modified phenolic resin. The friction material exhibits good anti-shuddering properties and is especially useful in continuous slip clutch applications.Type: GrantFiled: March 7, 1996Date of Patent: October 14, 1997Assignee: Borg-Warner Automotive, Inc.Inventors: Robert Chi-Chiu Lam, Yih-Fang Chen
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Patent number: 5639804Abstract: The present invention relates to a friction material comprising a silicone resin, a phenolic resin, and, in certain embodiments, silicon nitride particles, incorporated into an aqueous paper formulation which is then formed into a friction material. The friction material is prepared by mixing the silicone resin, the phenolic resin (and, in certain embodiments, silicon nitride particles) into a raw paper formulation, forming a porous friction material, and heating the friction material to cure the phenolic resin and silicone resin.Type: GrantFiled: March 22, 1996Date of Patent: June 17, 1997Assignee: Borg-Warner Automotive, Inc.Inventor: Marc A. Yesnik
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Patent number: 5532296Abstract: Bismaleimide resin systems and fiber reinforced prepregs prepared therefrom having exceptional toughness are prepared by dispersing into a bismaleimide base resin system preformed functionalized elastomer particles having a T.sub.g of less than 10.degree. C.Type: GrantFiled: September 24, 1993Date of Patent: July 2, 1996Assignee: Cytec Technology Corp.Inventors: Hans G. Recker, Helmut Tesch, Thomas Weber, Volker Altstaedt, Jack D. Boyd
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Patent number: 5516587Abstract: A friction member having a high frictional force, a small frictional force fluctuation and excellent wear resistance, which is composed of a substrate coated with a friction material comprising a phenolic resin, 5 to 20% by weight, based on the weight of the friction material, of at least one heat-resistant fiber selected from the group consisting of carbon fiber and aromatic polyamide fiber, 10 to 50% by weight, based on the weight of the friction material, of a solid lubricant and 5 to 30% by weight, based on the weight of the friction material, of at least one wear resistant material selected from the group consisting of Al.sub.2 O.sub.3, SiC and Si.sub.3 N.sub.4, and if necessary, 5 to 20% by weight, based on the weight of the friction material, of at least one soft organic compond selected from the group consisting of a fluorine-containing organic compound and a silicon-containing organic compound.Type: GrantFiled: May 23, 1994Date of Patent: May 14, 1996Assignee: Daido Metal Company Ltd.Inventors: Tadashi Tanaka, Hidehiko Tamura, Katsumi Sawano, Nobutaka Hiramatsu
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Patent number: 5502109Abstract: Heat-stable moldings for brake linings, clutch linings and grinding tools are produced by molding and vulcanizing a mixture containing a natural or synthetic rubber in the presence of a sulfur-free vulcanizer/activator system comprising phenol resols which contain at least 90 mol % of p-(C.sub.3 -C.sub.12)-alkylphenols, based on the total amount of phenols, and a substance, or mixture of substances, which acts as a Bronsted or Lewis acid under the reaction conditions of the rubber-vulcanization, at a temperature of 120.degree. to 250.degree. C.Type: GrantFiled: December 21, 1994Date of Patent: March 26, 1996Assignee: Hoechst AktiengesellschaftInventors: Siegfried Wallenwein, Richard Sattelmeyer
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Patent number: 5474842Abstract: A composite friction or gasketting material is disclosed having a combination of thermoset or thermoplastic matrix resin, fiber reinforcing material, and aramid particles. The composite material exhibits improved wear resistance when compared with materials having no aramid particles.Type: GrantFiled: December 15, 1994Date of Patent: December 12, 1995Inventor: David E. Hoiness
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Patent number: 5472995Abstract: Improved asbestos-free fiber reinforced material for use in the manufacture of gaskets, and the like, comprises (a) an elastomeric binder material and (b) a blend of fibrillated, organic, synthetic polymer, organic synthetic polymer staple and organic synthetic, soluble polymer particles so as to enhance the strength of the gaskets, shock mountings, timing belts, sealants, and the like, made from such materials.Type: GrantFiled: August 9, 1994Date of Patent: December 5, 1995Assignee: Cytec Technology Corp.Inventors: Stanley S. Kaminski, Robert E. Evans
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Patent number: 5460250Abstract: A brake pad friction lining having, as required by UIC regulations for use on railways in Europe, a coefficient of friction under wet conditions not less than 85% of that under dry conditions, comprising a fibre-reinforced matrix of organic polymeric material which includes non-fibrous particulate material serving as friction or wear modifier or filler. The organic polymeric material employed according to the invention comprises cured high-hysteresis elastomeric material, for example a high-styrene/butadiene rubber, in a proportion by volume of the lining which is high enough to ensure a loss angle of at least 13.degree. therein.Type: GrantFiled: March 2, 1995Date of Patent: October 24, 1995Assignee: Ferodo LimitedInventor: Mahmoud Lotfipour
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Patent number: 5453317Abstract: The present invention relates to a non-asbestos friction material comprising a phenolic or phenolic-modified resin (and in certain embodiments, silicon nitride particles) incorporated into a fibrous base material which is then impregnated with a silicone resin. The friction material is prepared by mixing the phenolic or phenolic-modified resin (and, in certain embodiments, silicon nitride particles) into an aqueous paper formulation, forming a porous fibrous base material, impregnating the fibrous base material with a silicone resin, and heating the impregnated material to cure the phenolic resin and the silicone resin.Type: GrantFiled: August 31, 1993Date of Patent: September 26, 1995Assignee: Borg-Warner Automotive, Inc.Inventor: Marc A. Yesnik
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Patent number: 5449704Abstract: A liquid composition which on exposure to actinic radiation polymerises to form a heat-curable solid film adhesive, said composition comprising (A) a heat-curable phenol-aldehyde resol resin, (B) a photopolymerisable resin having, on average, more than one polymerisable acrylic group per molecule, (C) a photopolymerisation initiator for (B) and (D) an aminotriazine-formaldehyde resin.Type: GrantFiled: December 14, 1993Date of Patent: September 12, 1995Assignee: Ciba-Geigy CorporationInventors: Stuart J. Thompson, Stuart Mansfield
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Patent number: 5434211Abstract: Heat-curable adhesive in powder form and solvent-free, containing a mixture of solid phenolic resin with latent hardener in combination with an inorganic pigment mixture.Type: GrantFiled: January 11, 1994Date of Patent: July 18, 1995Assignee: Beiersdorf AktiengesellschaftInventors: Hans K. Engeldinger, Jurgen Kramer, Jurgen Siepmann
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Patent number: 5395864Abstract: A wet frictional material comprises a fiber base material such as natural pulp fibers or organic synthetic fibers, a filler such as diatomaceous earth or cashew resin, a friction adjustment agent, thermosetting synthetic resin, and activated carbon fibers so that the wet frictional material is high in friction coefficient and superior in heat resistance.Type: GrantFiled: June 18, 1993Date of Patent: March 7, 1995Assignee: Nsk-Waner Kabushiki KaishaInventors: Tatsuro Miyoshi, Shun Kitahara, Shigeki Umezawa
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Patent number: 5384344Abstract: A friction material containing dust having bismaleimidetriazine as a major ingredient. The dust is effective when contained in amount of 1 to 20 wt. % in the friction material. Compared with conventional friction material containing cashew dust, the generation rate of noise is reduced drastically, while the frictional performance is equivalent or higher.Type: GrantFiled: September 13, 1993Date of Patent: January 24, 1995Assignees: Akebono Brake Industry Co., Ltd., Akebond Research and Development Centre Ltd.Inventors: Nobuo Kamioka, Hiroshi Tokumura, Toru Yoshino
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Patent number: 5292780Abstract: This invention relates to a composition suitable for use in friction elements and comprises a frictional material and a binder, the latter being a blend of a polyvinyl alkyl ether with a phenolic resin and optionally a rubber.Compared with conventional friction elements based on organic polymers, the elements produced using the compositions of the present invention shows increases in flexural strength of up to 50% with no loss in wear or friction performance.Type: GrantFiled: July 11, 1990Date of Patent: March 8, 1994Assignee: BP Chemicals LimitedInventors: Christopher G. Godfrey, Bryan H. McCormick
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Patent number: 5268398Abstract: A friction material is so manufactured that a hygienic environment can be maintained while simultaneously reducing the brake noise without reducing the friction coefficient of the brake pads made of the present material. The friction material is granulated or agglomerated by a first binder which binds one or more inorganic substances having a plane netlike crystal structure into granules which are deformed so that the particles have a flat particle orientation in the resulting granules. The flat particle orientation is achieved by the application pressure and/or heat during the formation. The granules are then embedded in a second binder forming a fibrous matrix for forming the brake pad material. The inorganic substance or substances forming the particles having the plane netlike crystal structure, promote a microseparation in the friction surface in response to the application of a brake force. The microseparation effectively prevents brake noise.Type: GrantFiled: August 17, 1992Date of Patent: December 7, 1993Assignee: Sumitomo Electric Industries, Ltd.Inventors: Mitsuhiko Nakagawa, Yukinori Yamashita, Masanori Ibuki, Hiroya Kishimoto
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Patent number: 5230952Abstract: A sintered fluorocarbon resin based composite friction material having a high coefficient of friction, greater hardness, good machineability and improved wear resistance. The composite material comprises a homogeneous blend of fluorocarbon resin, aramid and carbon fibers, aluminum oxide and polyester compound. Also provided are process steps required to produce such materials with the desired characteristics of homogeneity, hardness and wear resistance. These steps include a premix together of the fiber components and final sintering at a pressure of about 1600 psi.Type: GrantFiled: June 17, 1991Date of Patent: July 27, 1993Assignee: Coltec Industries Inc.Inventor: H. Lee McCord
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Patent number: 5190991Abstract: A brake lining is made from a preform which has been formed by a compression step parallel to that surface of the brake lining preform which is to be the braking surface of the lining in use and has subsequently been compressed in a direction substantially normal to said surface to form the lining. The preform can be made by dewatering an aqueous slurry of the brake lining ingredients prior to the first compression step.Type: GrantFiled: November 1, 1990Date of Patent: March 2, 1993Assignee: Nuturn CorporationInventors: Euan Parker, Bruno Grele
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Patent number: 5145888Abstract: Non-asbestos ion-polymer composite friction materials show high heat resistance and low wear, being especially useful for friction elements in brake shoes or blocks in automobiles and industrial machines. The non-asbestos ion-polymer composites are basically composed of a polyacrylonitrile fiber and an ion-polymer used as binder matrix. An optional friction modifier can be added to include, e.g., carbon, graphite and/or MoS.sub.2, etc. The ion-polymer is polymerized from alpha, beta-unsaturated-gamma-carbonyl monomers, e.g., acrylic acid, or esters thereof or their comonomers, directly onto the solid surface of divalent metal compounds, e.g., Ca, Sr, Ba, Zn salt(s) and/or oxide(s).Type: GrantFiled: October 26, 1989Date of Patent: September 8, 1992Inventors: Ke-Cheng Gong, Yang-Meng Ou, Gregory S. Yeh
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Patent number: 5132065Abstract: A railroad brake shoe friction composition is prepared in the absence of a volatile solvent by first preparing a fluid paste bonding matrix containing an uncured rubber compound, a blend of highly polymerized cashew nut shell liquid resin with a reactive diluent and high surface area inorganic fillers, and thereafter adding other fillers and reinforcing fibers.Type: GrantFiled: April 24, 1991Date of Patent: July 21, 1992Assignee: Amsted Industries, Inc.Inventor: C. Dale Christie
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Patent number: 5122550Abstract: A non-asbestos friction material composition suitable for use as a friction element includes: a binder; a reinforcing material; and a structural integriy imparting amount of cellulose ester fibrils.Type: GrantFiled: November 21, 1990Date of Patent: June 16, 1992Assignee: Hoechst Celanese CorporationInventor: Thomas E. Schmitt
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Patent number: 5106887Abstract: The invention relates to a non-asbestos friction material comprising fibrillated acrylic fibers admixed with fibrous base materials selected from glass fibers, heat-resistant organic fibers, inorganic fibers and metallic fibers, said fibrillated acrylic fibers having a freeness (Canadian Standard Freeness) of at least 450 ml, a thermosetting resin and a friction modifier, and a method for production thereof.Type: GrantFiled: February 5, 1991Date of Patent: April 21, 1992Assignee: Akebono Brake Industry Co., Ltd.Inventor: Kazuya Horiguchi
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Patent number: 5093388Abstract: A high friction brake shoe formulation having a high static friction coefficient in shear of about 1.5 and low adhesion to materials having microscopic pores therein in contact with said brake shoe formulation which comprises a mixture of about 75 phr of neoprene W rubber and about 25 phr of neoprene WHV rubber; a first curing system comprising about 1 phr of a fatty acid, about 5 phr of ZnO, and about 1-3 phr of MgO; and a second curing system comprising about 1.25 phr of sulfur and about 0.6 phr of a sulfur accelerator; together with about 50 phr of a reinforcing agent of N555 or N650 carbon black.Type: GrantFiled: March 28, 1989Date of Patent: March 3, 1992Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: John T. Siemon, Jr., Joseph F. Meier
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Patent number: 5087642Abstract: A friction material is disclosed, which is characterized in that, in the friction material comprising reinforcing material, friction modifier, solid lubricant and thermosetting organic binder, said thermosetting organic binder is a resin having less hydroxyl group content compared with phenol resin.Type: GrantFiled: October 24, 1989Date of Patent: February 11, 1992Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre, Ltd.Inventors: Katsuji Seki, Naoyuki Hashimoto
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Patent number: 5083650Abstract: A friction member which is suitable for use as a friction facing member in a transmission is provided. the friction member includes a uniform density heat resistant paper, a first layer of thermoset polymeric binder coated over and at least partially impregnated into one major surface of the paper, granular carbon friction particles uniformly distributed over and partially imbedded in the exposed surface of the first layer and a second layer of thermoset binder over the first layer and partially imbedded granular friction particles which coats without obscuring the granular friction particles.Type: GrantFiled: May 24, 1991Date of Patent: January 28, 1992Assignees: Minnesota Mining and Manufacturing Company, General Motors CorporationInventors: David S. Seiz, Larry Eldridge
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Patent number: 5080969Abstract: The invention relates to a composite friction material for brakes comprising a main friction material containing thermosetting resin as a binder, and a layer of high friction material with a higher friction coefficient than said main friction material for exhibiting a high braking power on initial application, which high friction layer is provided on the surface of said main friction material and contains a phenol resin of not more than 5 wt. %.Type: GrantFiled: September 18, 1990Date of Patent: January 14, 1992Assignees: Akebono Brake Industry Co., Ltd., Akebono Research and Development Centre Ltd.Inventor: Hiroshi Tokumura
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Patent number: 5041471Abstract: A non-asbestos friction material has a core group of fibers that is universally used in a plurality of friction material formulations to provide appropriate friction materials for different end uses. The universal core group is resistant to temperatures above 1000.degree. F. Friction materials made with the core group have the additional advantage of long wear. Polybenzimidazole (PBI) is an essential element of the core group of fibers because its friction level increases as the temperature increase. The other elements of the core group are aramid fibers, carbon fibers, and a high strength ceramic fiber.Type: GrantFiled: October 29, 1990Date of Patent: August 20, 1991Assignee: Braketech, IncorporatedInventor: Arpad E. Brinzey
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Patent number: 5004497Abstract: A friction material containing 0.85 to 30% by weight of carbon fibers and 2 to 20% by weight of aramid fibers for use as brake pads, brake linings, clutch facings and other mechanical component parts which are subjected to severe frictional contact with other mechanical component parts. The aramid fibers preferably consist of para-aramid fibers and/or a combination of chopped aramid fibers and fibrillar aramide fibers. There is a certain preferred range for the ratio between the aramid fiber content and the carbon fiber content. This friction material offers advantages in a high-temperature stability of the coefficient of friction, a favorable wear property, freedom from sticking and uneven wears, and superior anti-fade properties.Type: GrantFiled: September 12, 1989Date of Patent: April 2, 1991Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Katsuhiro Shibata, Yuichi Azuma, Tsuguya Suzuki
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Patent number: 4994506Abstract: Asbestos-free brake lining comprising phenolic resin and usual fillers and in addition an amount of a synthetic hydrated calcium silicate particle of xonotlite with a substantially spherical morphology and a mean diameter of 50 to 70 .mu.m with an open inner structure and an outer shell with a close limited crystal structure with pore openings of up to 10.sup.-7 m in the outer shell.Type: GrantFiled: August 31, 1989Date of Patent: February 19, 1991Assignee: Redco N.V.Inventors: Octavian Anton, Alfred Eckert, Armin Eckert
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Patent number: 4954536Abstract: A brake-friction material comprising:(a) a base material having a fiber structure for giving a high mechanical strength and a high friction coefficient to the brake-friction material;(b) a lubricant for decreasing a wear of the brake-friction material;(c) a filler for giving a heat stability to the brake-friction material and helping friction characteristic of the brake-friction material; and(d) a bonding material composed;wherein the bonding material is composed of condensed polynuclear aromatic hydrocarbon resin.Type: GrantFiled: April 19, 1989Date of Patent: September 4, 1990Assignee: Tokico Ltd.Inventors: Teruyuki Komori, Shingo Miyake, Yoshio Senoo
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Patent number: 4920159Abstract: The present invention is a composition comprising a friction resistant filler and a cyanato group containing phenolic resin which has repeating units of the formula: ##STR1## wherein p is 0 or an integer of one or more, q is an integer of one or more, and X is a radical selected from the group consisting of: --CH.sub.2 --, --CO--, --SO.sub.2 --, ##STR2## with --CH.sub.2 -- preferred. R is the same or different and is selected from the group consisting of hydrogen and methyl radicals and composition based on phenolic triazine resins derived therefrom.Type: GrantFiled: January 11, 1989Date of Patent: April 24, 1990Assignee: Allies-Signal Inc.Inventors: Sajal Das, Dusan C. Prevorsek, Seong K. Rhee, William J. Bulger
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Patent number: 4886706Abstract: An improved fibrous polyacrylonitrile mixture for use in friction products enables the production of low resiliency preforms by mixing an additive with a polyacrylonitrile wet gel. The additive is incorporated into the fiber in extremely large amounts. The additive is a member selected from the group consisting of:(a) polyethylene glycol esters of pelargonic acid; or(b) polyethylene glycol esters of enanthic, caprylic or capric acids; or(c) blends of polyethylene glycol esters of enanthic, caprylic, pelargonic, or capric acids; or(d) blends of polyethylene glycol esters of carboxylic acids derived from natural products containing at least 50% by weight of carboxylic acids containing less than 14 carbon atoms; or(e) reaction products of ethylene oxide and carboxylic acid amides wherein at least 70% of the acids from which the amide is derived contain between 16 and 20 carbon atoms.Type: GrantFiled: March 11, 1987Date of Patent: December 12, 1989Assignee: BASF CorporationInventors: Hughey A. Rush, Billy B. Hibbard, Johnson L. Pursoo, John W. Lindsay, Thomas E. Smith, Kenneth Harper, MIchael V. Tullos, James E. Davis
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Patent number: 4866107Abstract: The addition of fibrillated acrylic fiber to non-asbestos type friction material compositions provides marked improvement in the flexural strength, stiffness and structural integrity of preforms used in the manufacture of friction elements. The consequent handling characteristics of the preform provide improvement in the manufacturing of the friction element.Type: GrantFiled: July 26, 1988Date of Patent: September 12, 1989Assignee: American Cyanamid CompanyInventors: Leigh T. Doxsee, Robert E. Evans, Michael P. O'Toole
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Patent number: 4861809Abstract: A friction material containing from about 0.5-29 wt % of carbonaceous fibers with a bond nitrogen content of from about 14 to 21 wt %, an auxiliary material and a thermosetting resin. The material has good wear and temperature resistance characteristics and can be used in power transmissions and brakes.Type: GrantFiled: May 27, 1988Date of Patent: August 29, 1989Assignee: Toho Rayon Co., Ltd.Inventors: Hiroyasu Ogawa, Kenji Shimazaki, Kenji Niijima
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Patent number: 4855336Abstract: In a friction material wherein sponge iron is a principle friction producing component especially on initial engagement during a brake application, the improvement wherein 10-50% of the sponge iron is replaced with mill scale without a substantial change in the operational characteristics of the friction material.Type: GrantFiled: July 25, 1988Date of Patent: August 8, 1989Assignee: Allied-Signal Inc.Inventor: Charles E. Newell