US3909424A - Lubricant compositions - Google Patents

Lubricant compositions Download PDF

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Publication number
US3909424A
US3909424A US482297A US48229774A US3909424A US 3909424 A US3909424 A US 3909424A US 482297 A US482297 A US 482297A US 48229774 A US48229774 A US 48229774A US 3909424 A US3909424 A US 3909424A
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United States
Prior art keywords
lubricant
weight percent
accordance
lubricant composition
composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US482297A
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English (en)
Inventor
Harold A Clark
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Silicones Corp
Original Assignee
Dow Corning Corp
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Filing date
Publication date
Application filed by Dow Corning Corp filed Critical Dow Corning Corp
Priority to US482297A priority Critical patent/US3909424A/en
Priority to CA207,683A priority patent/CA1025427A/en
Priority to AU72744/74A priority patent/AU483170B2/en
Priority to GB3758074A priority patent/GB1455936A/en
Priority to DE2441503A priority patent/DE2441503C3/de
Priority to NL7412005.A priority patent/NL157943B/xx
Priority to JP10701974A priority patent/JPS537578B2/ja
Priority to FR7433637A priority patent/FR2276373A1/fr
Priority to BE149362A priority patent/BE820871A/xx
Application granted granted Critical
Publication of US3909424A publication Critical patent/US3909424A/en
Anticipated expiration legal-status Critical
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M7/00—Solid or semi-solid compositions essentially based on lubricating components other than mineral lubricating oils or fatty oils and their use as lubricants; Use as lubricants of single solid or semi-solid substances
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/04—Elements
    • C10M2201/041—Carbon; Graphite; Carbon black
    • C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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    • C10M2201/05—Metals; Alloys
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    • C10M2201/06—Metal compounds
    • C10M2201/061—Carbides; Hydrides; Nitrides
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    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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    • C10M2201/105—Silica
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    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
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    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
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    • C10M2205/024—Propene
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    • C10M2207/28—Esters
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/05—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon
    • C10M2229/051—Siloxanes with specific structure containing atoms other than silicon, hydrogen, oxygen or carbon containing halogen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2010/00—Metal present as such or in compounds
    • C10N2010/04—Groups 2 or 12
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/015—Dispersions of solid lubricants
    • C10N2050/02—Dispersions of solid lubricants dissolved or suspended in a carrier which subsequently evaporates to leave a lubricant coating
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/08—Solids
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy

Definitions

  • the present invention relates to solid lubricant compositions.
  • the invention relates to substrates coated with a film of dry solid lubricant.
  • the invention relates to a composition containing a novel film forming carrier for particulate solid lubricants.
  • Dry film lubricants are used to provide solid surfaces with a dry coating having some degree of permanance which serves as a lubricant in that it reduces the coefficient of friction.
  • This class of lubricants usually consists of particles of a solid lubricant dispersed in film-forming resin matrix.
  • a number of different resins have been proposed for use as the binder component of the lubricant film.
  • the most commonly used resin in dry film lubricants are the phenolic resins, including modified phenolics, epoxy resins and acrylic polymers. Silicones have been used to improve the heat-stability and load-bearing capacity of lubricant films see, for example, the disclosure of U.S. Pat. No. 3,288,710. Air drying solvent soluble silicones are proposed as the sole binder for dry lubricants in U.S. Pat. No. 3,674,690.
  • the present invention provides lubricant compositions suitable for use in forming dry films which'represent an improvement over the prior art in that the binder material is heat-stable, abrasion and corrosion resistant and is relatively inexpensive.
  • a lubricant composition comprising a homogeneous mixture of (a) a particulate solid lubricant and (b) a film-forming carrier consisting essentially of a dispersion of colloidal silica in a lower aliphatic alcoholwater solution of the partial condensate of a silanol of the formula RSi(OH) in which R is selected from the group consisting of alkyl radicals of 1 to 3 inclusive carbon atoms, the vinyl radical, the 3,3,3-trifluoropropyl radical, the gamma-glycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least 70 weight percent of the silanol being CH;,Si(OI-I) said carrier containing to 50 weight percent solids consisting essentially of 10 to'75 weight percent colloidal silica and 25 to 90 weight percent of the partial condensate, said carrier containing sufficient
  • Component (a) of the lubricant composition can be any finely divided particulate solid lubricant.
  • suitable solid lubricants include molybdenum disulfide, molybdenum diselenide, graphite, antimony trioxide, titanium disulfide, tungsten disulfide, tungsten diselenide, bismuth trioxide, lead sulfide, lead oxide, magnesium oxide, boron nitride, calcium fluoride, zirconium disulfide, colloidal silver and the like.
  • suitable solid lubricants include finely divided polymeric materials having inherent lubricity, subh as polytetrafluoroethylene (powdered Teflon), polytrifluoromonochloroethylene (Kel-F), nylon, polyalkylenes, such as polypropylene and copolymers thereof, polyimides and aromatic polyesters, such as poly(p-oxybenzoyl).
  • polytetrafluoroethylene such as polytetrafluoroethylene and poly(poxybenzoyl)
  • Kel-F polytrifluoromonochloroethylene
  • nylon polyalkylenes, such as polypropylene and copolymers thereof
  • polyimides and aromatic polyesters such as poly(p-oxybenzoyl).
  • certain of the polymers such as polytetrafluoroethylene and poly(poxybenzoyl) impart non-stick properties to the film.
  • solid lubricants such as mixtures of graphite and molybdenum disulfide, mixtures of calcium fluoride and boron nitride and mixtures of antimony trioxide and molybdenum disulfide.
  • These solid lubricants are available as finely divided powders generally having a particle size in the range of l to micron diameter.
  • a further discussion of solid lubricants can be found in Braithwaites Solid Lubricants and Surfaces, The Macmillan Company, New York (l964).
  • the film forming carrier for the solid lubricant is a dispersion of colloidal silica in an alcohol-water solution of the partial condensate of a trisilanol.
  • the carrier forms a binder film of silica and silsesquioxane.
  • the trisilanols are generated in situ by adding the corresponding trialkoxysilanes to acidic aqueous dispersions of colloidal silica.
  • Suitable trialkoxysilanes are those containing methoxy, ethoxy, isopropoxy and t-butoxy substituents, which upon hydrolysis liberate the corresponding alcohol; thus, generating at least a portion of the alcohol present in the carrier composition.
  • the silanol in the acidic aqueous medium there is condensation of the hydroxyl substituents to form Si-O-Si bonding.
  • the condensation is not complete, but rather the siloxane retains an appreciable quantity of silicon-bonded hydroxyl groups, thus rendering the polymer soluble in the water-alcohol sol-. vent.
  • This soluble partial condensate can be characterized as a siloxanol polymer having at least one siliconbonded hydroxyl group per every three SiO units.
  • these residual hydroxyls condense to give a silsesquioxane, RSiO
  • the silica component of the carrier composition is present as colloidal silica.
  • Aqueous colloidal silica dispersions generally have a particle size in the range of 5 to I50 millimicrons in diameter.
  • silica hydrosols are prepared by methods well-known in the art and are commercially available under such registered trademarks as Ludox and Nalcoag. It is preferred to use colloidal silica of -60 millimicron particle size in order to obtain dispersions having a greater stability and to provide films having superior properties. Colloidal silicas of this type are relatively free of Na O and other alkali metal oxides, generally containing less than 2 weight percent, preferably less than 1 weight percent Na O. They are available as both acidic and basic hy drosols. Colloidal silica is distinguished from other water dispersable forms of SiO-;, such as polysilicic acid or alkali metal silicates, which are not operative in the practice of the present invention.
  • the silica is dispersed in a solution of the siloxanol carried in alcohol-water cosolvent.
  • Suitable lower aliphatic alcohols include methanol, ethanol, isopropanol, and t-butyl alcohol. Mixtures of such alcohols can be used.
  • lsopropanol is the preferred alcohol and when mixtures of alcohol are utilized it is preferred to utilize at least 50 weight percent of isopropanol in the mixture to obtain optimum adhesion of the coating.
  • the solvent system should contain from about to 75 weight percent alcohol to ensure solubility of the siloxanol.
  • an additional water-miscible polar solvent such as acetone, butyl cellosolve and the like in a minor amount, for example, no more than 20 weight percent of the cosolvent system.
  • Suitable acids include both organic and inorganic acids such as hydrochloric, acetic, chloroaeetic, citric, benzoic, dimethylmalonic, formic, glutaric, glycolic, maleic, malonic, toluene-sulfonic, oxalic and the like.
  • the specific acid utilized has a direct effect on the rate of silanol condensation which in turn determines shelf life of the composition.
  • the stronger acids such as hydrochloric and toluenesulfonic acid, give appreciably shortened shelf or bath life and require less ageing to obtain the described soluble partial condensate.
  • the alkali metal salts of these acids are soluble, thus allowing the use of these acids with silicas containing a substantial (greater than 0.2% Na O) amount of alkali metal or metal oxide.
  • the carrier compositions are easily prepared by adding trialkoxysilanes, such as RSi(OCH to colloidal silica dispersion and adjusting the pH to the desired level by addition of the organic acid.
  • the acid can be added to either the silane or the dispersion prior to mixing the two components, provided that the mixing is done rapidly.
  • the amount of acid necessary to obtain the desired pH will depend on the alkali metal content of the silica but is usually less than one weight percent of the composition.
  • the carrier composition is a clear or slightly hazy low viscosity fluid.
  • the condensation of SiOH continues at a very slow rate and the composition will eventually form gel structures.
  • the bath life of the composition can be extended by maintaining the dispersion at below room temperature, for example at 40F.
  • Buffered latent condensation catalysts can be added to the carrier so that milder curing conditions can be utilized to obtain the optimum film properties in the final coating.
  • Alkali metal salts of carboxylic acids such as potassium formate, are one class of such latent catalysts.
  • the amine carboxylates and quaternary ammonium carboxylates are other classes of latent catalysts.
  • the catalysts must be soluble or at least miscible in the cosolvent system.
  • the catalysts are latent to the extent that at room temperature they do not appreciably shorten the bath life of the composition, but upon heating the catalyst dissociates and generates a catalytic species active to promote condensation, for example an amine.
  • Buffered catalysts are used to avoid effects on the pH of the composition.
  • colloidal silica dispersions contain free alkali metal which reacts with the organic acid during the adjustment of pH to generate the carboxylate catalyst in situ. This is particularly true when starting with a hydrosol having a pH of 8 or 9.
  • the acidic binder can be catalyzed by addition of carboxylates such as dimethylamine acetate, ethanolamine acetate, dimethylaniline formate, tetraethylammonium benzoate, sodium acetate, sodium propionate, sodium formate or benzyltrimethylammonium acetate.
  • carboxylates such as dimethylamine acetate, ethanolamine acetate, dimethylaniline formate, tetraethylammonium benzoate, sodium acetate, sodium propionate, sodium formate or benzyltrimethylammonium acetate.
  • the amount of catalyst can be varied depending upon the desired curing condition, but at about 1.5 weight percent catalyst in the composition, the bath life is shortened and physical properties of the film may be
  • a coating composition having a pH in the range of 4-5 which contains l025 weight percent solids; the silica portion having a particle size in the range of 560 millimicrons; the partial condensate of CH ,Si(OH being present in an amount in the range of 35 to 55 weight percent of the total solids in a cosolvent of methanol, isopropanol and water, the alcohols representing from 30 to 60 weight percent of the cosolvent and a catalyst selected from the group consisting of sodium acetate and benzyltrimethylammonium acetate being present in an amount in the range of 0.05 to 0.5 weight percent of the composition.
  • Such a composition is relatively stable, having a bath life of approximately one month, and, when coated on to a substrate, can be cured in a relatively short time at temperatures in the range of l25C.
  • compositions of the invention can contain minor amounts of conventional additives, such as thiotropic agents, for example, carboxy methyl cellulose, corrosion inhibitors, dyes, oxidation inhibitors and the like.
  • the lubricant compositions of the invention are formulated by mixing the particulate solid lubricant with the film-forming carrier under high-speed, high-shear conditions. These conditions ensure complete mixing and breaking up of any agglomerations of the solid lu-
  • the'lubricant compositions can be applied by brushing, dipping or other conventional technique to obtain a coherent uniform film on a solid substrate.
  • the film thickness can be varied with the method of coating but generally film thickness of from 0.1 to 5 mils are utilized.
  • Typical pretreatments of metals include phospating of ferrous alloys, oxidation of nickel-containing alloys and anodizing of titanium.
  • the lubricant film can be applied to other solid substrates, such as solid polymeric materials, for example, polyesters, polyamides and the like; cellulosic substrates, especially paper products to impart release properties; ceramics and the like.
  • the lubricant composition will air dry to give a lubricant film.
  • room temperature curing is complete in 24 hours. Curing can be accelerated by heating for example at 175F for four hours.
  • the curing mechanism is that of condensation of the residual silanol present in the partial hydrolyzate to provide a binder of RSiO and colloidal silica having particles of the solid lubricant incorporated therein.
  • the largely inorganic nature of RSi- O SiO matrix results in heat stability superior to that obtained using organic resin binders.
  • the scope of the present invention includes solid substrates having at least one surface thereof coated with a lubricant film comprising particles of a solid lubricant uniformly incorporated in a matrix of RSiO and colloidal silica, the matrix consisting essentially of to 75 weight percent SiO and 25 to 90 weight RSiO
  • the solid lubricant particles are preferably present in an amount in the range of to 60 weight percent based on the total weight of the composition.
  • EXAMPLE 1 v Sufficient glacial acetic acid was added to grams of an aqueous dispersion containing weight percent of 13-14 millimicron colloidal silica (0.32% Na O and initial pH of 9.8) to reduce the pH to 4.8. Methyltrimethoxysilane (17 grams) was added to the acidified dispersion. This binder composition was aged for two hours with agitation to ensure formation of the partial condensate. The binder composition contained 36 percent solids, half of which were colloidal silica, carried in a methanol-water cosolvent for the partial condensate.
  • the binder composition was blended with 25 grams of a commercially-available aqueous emulsion of particulate poly(tetrafluoroethylene) which contained 60-weight percent solids.
  • the emuls'ion was alkaline and acetic acid was added to the blend to adjust the pH to 4.8.
  • This lubricant composition was coated onto phosphate-treated steel panels.
  • the coating was air-dried for 'one hour and then cured at 135C for 15 minutes.
  • the coated panel was heated on a 300F hot plate and utilized as a cooking surface to fry egg whites. After frying until thoroughly coagulated, the egg white was readily removed with a spatula from the coated surface. Cookies baked for 15 minutes at 425F on the coated 'panel were also readily removed from the surface.
  • EXAMPLE 2 The binder composition described in Example 1 was mixed with various solid lubricants to formulate coating compositions which were applied to the surfaces of wear test blocks.
  • the lubricant formulations each contained 50 grams of the 36% solids binder composition, 50 grams of the particulate solid lubricant and 94 grams of isopropanol.
  • the compositions When cured, the compositions provided a coating containing 66.6 percent lubricant and 33.3 percent binder, 50 weight percent of the binder being silica, the remainder being CH SiO
  • lubricant properties were determined by the LFW-l test method. In obtaining the LFW-l results, an Alpha test machine (described in U.S. Pat. No.
  • a lubricant composition comprising a homogeneous mixture of a. a particulate solid lubricant and b. a film-forming carrier consisting essentially of a dispersion of colloidal silica in a lower aliphatic alcohol-water solution of the partial condensate of a silanol of the formula RSi(OH) in which R is selected from the group consisting of alkyl radicals of l to 3 inclusive carbon atoms, the vinyl radical, the 3 ,3 ,3-trifluoropropyl radical, the gamm aglycidoxypropyl radical and the gamma-methacryloxypropyl radical, at least weight percent of 7 8 the silanol being CH;,Si(Ol-l);;, said carrier contain- 5.
  • a lubricant composition in accordance with claim ing 10 to 50 weight percent solids consisting essen- 4 wherein the catalyst is an alkali metal salt of a carboxtially of 10 to 75 weight percent colloidal silica and li id 25 to 90 weight Pcrccnt of the Paltiall condensate, 6.
  • a lubricant composition in accordance with claim A c9mposn,lon m accPrdance with Claim 2 in which the acid is a carboxylic acid selected from 2 g 'l g the Sohd lubncam (a) polyuctrafluclc' et y ene the group consisting of acetic acid, formic acid, propionic acid and maeic acid 9.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)
  • Paints Or Removers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Laminated Bodies (AREA)
US482297A 1974-06-24 1974-06-24 Lubricant compositions Expired - Lifetime US3909424A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US482297A US3909424A (en) 1974-06-24 1974-06-24 Lubricant compositions
CA207,683A CA1025427A (en) 1974-06-24 1974-08-23 Lubricant compositions
AU72744/74A AU483170B2 (en) 1974-06-24 1974-08-27 Lubricant compositions
GB3758074A GB1455936A (en) 1974-06-24 1974-08-28 Lubricant compositions
DE2441503A DE2441503C3 (de) 1974-06-24 1974-08-30 Trockenfilmschmiermittel
NL7412005.A NL157943B (nl) 1974-06-24 1974-09-10 Werkwijze voor de bereiding van een bekledingssamenstelling.
JP10701974A JPS537578B2 (cg-RX-API-DMAC10.html) 1974-06-24 1974-09-17
FR7433637A FR2276373A1 (fr) 1974-06-24 1974-10-07 Compositions de lubrifiant et revetements lubrifiants solides formes a partir de ces compositions
BE149362A BE820871A (fr) 1974-06-24 1974-10-09 Compositions de lubrifiant et revetements lubrifiants solides formes a partir ces compositions

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CA (1) CA1025427A (cg-RX-API-DMAC10.html)
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US4557087A (en) * 1982-09-04 1985-12-10 Japanese National Railways Metallic sheath for a posttensioning method provided with rust proofing treatment
US4577443A (en) * 1981-11-13 1986-03-25 Oiles Industry Co., Ltd. Metallic sheath for posttensioning method
US4595602A (en) * 1984-09-04 1986-06-17 Xerox Corporation Process for preparing overcoated electrophotographic imaging members
US4606934A (en) * 1984-09-04 1986-08-19 Xerox Corporation Process for preparing overcoated electrophotographic imaging members
US4636324A (en) * 1984-03-30 1987-01-13 Kansai Paint Company, Ltd. Anti-icing compositions
US5236784A (en) * 1987-02-09 1993-08-17 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing material and plastic bearing
US5277831A (en) * 1991-03-06 1994-01-11 Hanano Commercial Co., Ltd. Method for low pressure die casting with low pressure die casting powdery mold releasing agent
US5279750A (en) * 1991-03-06 1994-01-18 Hanano Commercial Co., Ltd. Method for squeeze casting powdery mold releasing agent
US5279749A (en) * 1991-03-06 1994-01-18 Hanano Commercial Co., Ltd. Method for permanent mold casting with permanent mold casting powdery mold releasing agent
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US6576598B2 (en) 2001-08-22 2003-06-10 David Thomas Brown Ballistics conditioning
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US20150152956A1 (en) * 2013-12-02 2015-06-04 Aktiebolaget Skf Disconnectable pulley device, alternator comprising such a device and internal combustion engine equipped with such a device or such an alternator
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Cited By (38)

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US4329238A (en) * 1979-07-30 1982-05-11 Mitrofanova Alla K Antifriction paste and solid antifriction coating prepared from same
US4577443A (en) * 1981-11-13 1986-03-25 Oiles Industry Co., Ltd. Metallic sheath for posttensioning method
US4557087A (en) * 1982-09-04 1985-12-10 Japanese National Railways Metallic sheath for a posttensioning method provided with rust proofing treatment
US4636324A (en) * 1984-03-30 1987-01-13 Kansai Paint Company, Ltd. Anti-icing compositions
US4595602A (en) * 1984-09-04 1986-06-17 Xerox Corporation Process for preparing overcoated electrophotographic imaging members
US4606934A (en) * 1984-09-04 1986-08-19 Xerox Corporation Process for preparing overcoated electrophotographic imaging members
US5236784A (en) * 1987-02-09 1993-08-17 Kabushiki Kaisha Sankyo Seiki Seisakusho Bearing material and plastic bearing
US5279750A (en) * 1991-03-06 1994-01-18 Hanano Commercial Co., Ltd. Method for squeeze casting powdery mold releasing agent
US5279749A (en) * 1991-03-06 1994-01-18 Hanano Commercial Co., Ltd. Method for permanent mold casting with permanent mold casting powdery mold releasing agent
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Publication number Publication date
AU7274474A (en) 1976-03-04
FR2276373B1 (cg-RX-API-DMAC10.html) 1976-12-31
NL157943B (nl) 1978-09-15
CA1025427A (en) 1978-01-31
JPS537578B2 (cg-RX-API-DMAC10.html) 1978-03-18
FR2276373A1 (fr) 1976-01-23
BE820871A (fr) 1975-04-09
DE2441503C3 (de) 1982-05-19
DE2441503B2 (de) 1981-07-30
NL7412005A (nl) 1975-12-30
DE2441503A1 (de) 1976-01-15
JPS512877A (cg-RX-API-DMAC10.html) 1976-01-10
GB1455936A (en) 1976-11-17

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