EP1159379A1 - Composition de lubrifiant contenant du sulfure stannique - Google Patents

Composition de lubrifiant contenant du sulfure stannique

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Publication number
EP1159379A1
EP1159379A1 EP00910755A EP00910755A EP1159379A1 EP 1159379 A1 EP1159379 A1 EP 1159379A1 EP 00910755 A EP00910755 A EP 00910755A EP 00910755 A EP00910755 A EP 00910755A EP 1159379 A1 EP1159379 A1 EP 1159379A1
Authority
EP
European Patent Office
Prior art keywords
tin
weight
solid lubricant
composition
lubricant
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.)
Withdrawn
Application number
EP00910755A
Other languages
German (de)
English (en)
Inventor
Volker Von Drach
Karl-Heinz Hensel
Dieter Guhl
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.)
Setral Chemie GmbH
Original Assignee
Setral Chemie GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Setral Chemie GmbH filed Critical Setral Chemie GmbH
Publication of EP1159379A1 publication Critical patent/EP1159379A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/22—Compounds containing sulfur, selenium or tellurium
    • 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
    • C10M103/00—Lubricating compositions characterised by the base-material being an inorganic material
    • C10M103/06—Metal compounds
    • 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
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/06—Metal compounds
    • C10M2201/065—Sulfides; Selenides; Tellurides
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/08—Hydraulic fluids, e.g. brake-fluids
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/135—Steam engines or turbines
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/16—Dielectric; Insulating oil or insulators
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/17—Electric or magnetic purposes for electric contacts
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/175—Pantographs, i.e. printing devices
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/18—Electric or magnetic purposes in connection with recordings on magnetic tape or disc
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/14—Electric or magnetic purposes
    • C10N2040/185—Magnetic fluids
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/20—Metal working
    • C10N2040/22—Metal working with essential removal of material, e.g. cutting, grinding or drilling
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/251—Alcohol fueled engines
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines
    • C10N2040/255—Gasoline engines
    • C10N2040/28—Rotary engines
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/30—Refrigerators lubricants or compressors lubricants
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/32—Wires, ropes or cables lubricants
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/36—Release agents or mold release agents
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/38—Conveyors or chain belts
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/40—Generators or electric motors in oil or gas winning field
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/42—Flashing oils or marking oils
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/44—Super vacuum or supercritical use
    • 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
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/50—Medical uses

Definitions

  • the present invention relates to a lubricant composition, in particular a liquid or semi-solid lubricant composition, which contains tin disulfide (Berndtit, musiv gold, hexagonal crystal structure) as the only or predominant solid lubricant with a layered grid structure.
  • a lubricant composition in particular a liquid or semi-solid lubricant composition, which contains tin disulfide (Berndtit, musiv gold, hexagonal crystal structure) as the only or predominant solid lubricant with a layered grid structure.
  • Molybdenum disulphide (MoS 2 ), graphite and polytetrafluoroethylene (PTFE) are used as solid lubricant components in lubricants for technical applications. They are typically used in greases, pastes, lubricating varnishes, suspensions, dispersions, mineral and synthetic oils, solvents and water-based cooling lubricants. The solid lubricants are intended to ensure greater wear protection and improve the friction coefficients.
  • PTFE is only stable up to 250 ° C and molybdenum disulfide up to approx. 350 ° C, while graphite has no additional separating effect and both graphite and molybdenum disulfide can only be used to a limited extent in the food sector due to their dark color.
  • GB 956 568 describes a solid lubricant composition which, in addition to a first sulfide component, such as molybdenum disulfide, has a second sulfide component, such as tin disulfide, in an amount of up to 30% by weight.
  • Tin disulfide improves the wear and lubrication properties of molybdenum disulfide.
  • tin disulfide is not the optimal additive and is a poorer lubricant than molybdenum disulfide.
  • CH 644 890 describes a lubricant which contains a mixture of 60 to 90% by weight of graphite and 10 to 40% by weight of a metal sulfide, such as molybdenum disulfide or tin disulfide.
  • a metal sulfide such as molybdenum disulfide or tin disulfide.
  • graphite and molybdenum disulphide it is found that when used above 200 ° C the friction rises sharply.
  • EP 108 892 A describes solid construction materials with good sliding properties for use in mechanical engineering, which contain 20 5 to 80% by weight of a metal sulfide, such as molybdenum disulfide or tin disulfide, and 80 to 20% by weight of graphite.
  • the molded parts made from the construction materials have good sliding and corrosion properties.
  • EP 654 616 describes a friction lining mixture for brake and clutch linings which contains tin sulfide or tin disulfide as a solid lubricant.
  • the use of the tin sulfides leads to an improvement in the wear of the friction partners and to a decrease in the susceptibility of the counterpart to the friction lining 5 and to an improvement in the lubrication functions at temperatures above 400 ° C.
  • WO 99/52997 describes a solid lubricant made of a tin sulfide matrix made of several tin sulfides and carbon embedded therein. The solid lubricant is used in friction linings.
  • DE 15 94 367 A describes a process for producing an oleophilic solid lubricant by mixing a mixture of graphite, sulfur, mixtures of metal powders and sulfur and covalent or ionic metal sulfides in an organic liquid, see.
  • B a hydrocarbon bs to a BET surface area of 10 to 800 m 2 / g.
  • the oleophilic tin sulfide can be used as a solid lubricant and has an improved load capacity compared to conventional SnS 2 .
  • Lubricant compositions with molybdenum disulfide or graphite as solid lubricant have the disadvantage that their wear resistance is unsatisfactory at high temperatures but also at low temperatures. In addition, their use leads to very dark colored compositions, which is often undesirable. The use of other metal sulfides in turn results in lubricant compositions whose lubricating properties often leave something to be desired.
  • the object of the present invention is therefore to provide a lubricant composition which has both good lubricating properties and high wear resistance.
  • the lubricant composition should not be significantly darker than the lubricant base.
  • the present invention therefore relates to a lubricant composition which contains a solid lubricant with a layered grid structure which comprises 70 to 100% by weight of non-oleophilic tin disulfide, based on the total weight of the solid lubricant with a layered grid structure.
  • the tin disulfide (SnS 2 ) can also be mixed with at least one other tin sulfide, such as SnS, Sn 2 S 3 (tin (II, IV) mixed sulfide) and Sn 3 S 4 .
  • Mixtures of SnS 2 and SnS are preferred; SnS 2 and Sn 2 S3; and SnS 2 , SnS and Sn 2 S 3 .
  • the amount of SnS 2 in a mixture with another tin sulfide is generally in the range from 70 to 99.5% by weight, based on the total weight of the mixture.
  • the lubricant composition is preferably carbon-free.
  • the solid lubricant with a layered grid structure preferably comprises 80 to 100% by weight and particularly preferably 90 to
  • the lubricant composition according to the invention can be in solid form, for example as a powder, in semi-solid form, for example as a paste or in liquid form, for example as a dispersion or suspension.
  • a liquid or semi-solid lubricant composition is preferred.
  • the amount of solid lubricant with a lattice structure in the lubricant composition varies depending on the form and application of the composition. In the case of a liquid lubricant composition, this amount is generally in the range from 0.5 to 20% by weight, in particular 1 to 10% by weight, based on the total weight of the composition. In the case of a semi-solid lubricant composition, this amount is generally in the range from 15 to 80% by weight, in particular 20 to 70% by weight. In the case of a solid lubricant composition, this amount is generally in the range of 10 to 100% by weight. %, preferably 20 to 100% by weight of the composition or 50
  • liquid lubricant compositions according to the invention contain the tin disulfide suspended or dispersed in a liquid which is selected depending on the application.
  • Such liquids are known to the person skilled in the art and, for. As described in Ullmann's Encyclo-pedia of Industrial Chemistry, 5 th Ed., Vol. A 15, 429-443, 1990. Examples of such liquids are
  • Mineralols synthetic oils, e.g. B. synthetic hydrocarbons, such as polyolefinols, chlorinated hydrocarbons or hydrocarbonols (isoparaffins) obtained by hydrocracking, polyetherols, esterols, phosphoric esters, silicone oils etc. vegetable oils, such as rapeseed oil or linseed oil.
  • synthetic hydrocarbons such as polyolefinols, chlorinated hydrocarbons or hydrocarbonols (isoparaffins) obtained by hydrocracking, polyetherols, esterols, phosphoric esters, silicone oils etc.
  • vegetable oils such as rapeseed oil or linseed oil.
  • Useful polyolefinols are in particular polymers of Cs-Ci2-D-01ef ⁇ nen.
  • Aliphatic polyetherols such as
  • poly(alkylene glycols) e.g. B. polyethylene glycol, poly (propylene glycol) and copolymers thereof and the mono- and diether, ester Ether and Diether of it.
  • alkylene glycols e.g. B. polyethylene glycol, poly (propylene glycol) and copolymers thereof and the mono- and diether, ester Ether and Diether of it.
  • Aliphatic polyether oils also include perfluoropolyalkyl ethers.
  • Preferred polyetherols are polyphenyl ethers.
  • ester oils are in particular the following types of esters:
  • esters of branched primary alcohols with straight-chain dicarboxylic acids a) esters of branched primary alcohols with straight-chain dicarboxylic acids; b) esters of branched monocarboxylic acids with straight-chain diols or poly (alkylene glycols); c) esters of straight-chain primary alcohols with branched dicarboxylic acids; and d) esters of neopentyl polyols with monocarboxylic acids.
  • Branched primary alcohols are in particular the alcohols obtained by oxosynthesis or aldol condensation, such as 2-ethylhexanol and the C 7 -, C ⁇ - and C 9 - oxo alcohols.
  • Sebacic, azelaic and adipic acids are particularly preferred as the dicarboxylic acid.
  • poly (alkylene glycol) poly (ethylene glycol) having a molecular weight of 100 to 600 is preferred.
  • esters of the neopentyl polyols are, in particular, esters of neopentyl glycol, trimethylolethane, trimethylolpropane, pentaerythritol and the ethoxylated and / or propoxylated products thereof.
  • esterols and the polyetherols are preferred.
  • liquid lubricant compositions according to the invention are motor oils, gear oils, turbine oils, hydraulic fluids, pump oils, heat transfer agents, insulating oils, drilling holes, cutting oils, compressor oils, chain oils, glass machine oils, separating oils, weapon oils, cylinder oils, sliding coatings on losemite tel- or water-based (before the evaporation of the carrier liquid), cooling lubricants etc.
  • Semi-solid lubricant compositions according to the invention are generally based on mineral or synthetic greases and mineral or synthetic oils (as stated above) in connection with suitable thickeners.
  • Examples of semi-solid lubricant compositions according to the invention are greases, pastes, vehicle greases, roller and slide bearing greases etc.
  • purely organic thickeners such as polyureas and polyurethanes,. amorphous or hydrophobized silicon dioxide,
  • Layered silicates such as bentonites, which can be hydrophobic,
  • Bonds especially metal salts of fatty acids such as stearic acid or 12-hydroxystearic acid.
  • the metal salts of the fatty acids can be used in a mixture with salts of short-chain carboxylic acids, such as acetic acid or benzoic acid.
  • Useful cations are e.g. B. Li + , Na + , K + , Ca + ,
  • solid lubricant compositions are lubricating varnishes (solvent or water based) in the effective state, i.e. H. after evaporation of the carrier liquid, coatings for bearings, connectors, bolts etc. and solid lubricants that are used as additives, e.g. B. for friction linings or self-lubricating plastics.
  • the lubricants according to the invention can contain up to 30% by weight of other solid lubricants with a layered grid structure, such as molybdenum disulfide, antimony trisulfide, tungsten disulfide, bismuth trisulfide, lead sulfide, graphite etc. They can also contain other solid lubricants such as polytetrafluoroethylene.
  • the lubricant compositions according to the invention can contain conventional additives, such as oxidation inhibitors, viscosity improvers, pour point (or pour point) depressants, detergents and dispersants (HD additives), EP (extreme pressure) additives; Friction modifiers, anti-foaming agents,
  • Demulsifiers Demulsifiers, corrosion inhibitors, emulsifiers, etc.
  • Usable additives and their use in the respective lubricant compositions are described, for example, in Ullmann's Encyclopedia of Industrial Chemistry, 5th edition, volume 15, page 446 ff.
  • tin disulfide which is commercially available or produced by known processes can be used as the tin disulfide.
  • Tin disulfide which is produced by precipitation and subsequent tempering or by reacting a tin (II) compound or metallic tin with sulfur, optionally under protective gas, without the addition of halide-containing substances at a temperature in the range from 350 to 750 ° C.
  • Tin (II) compounds which can be used as starting products are, for example, SnS, SnCl 2 , SnS0, tin (II) carboxylates, such as tin (II) formate and tin (II) oxalate.
  • the tin disulfide obtained is a homogeneous, golden yellow powder which does not change color even at higher temperatures.
  • Mixtures of SnS 2 , SnS and / or Sn 2 S 3 can e.g. B. by the method described in WO 99/52997.
  • the lubricant compositions according to the invention are prepared in a customary manner by incorporating the tin disulfide into the liquid, semi-solid or solid compound mentioned with the aid of conventional mixing devices.
  • the lubricant compositions according to the invention have excellent lubricating properties and excellent wear resistance at both high and low temperatures. Wear improves significantly compared to similar lubricant compositions with other solid lubricants, especially under load and at higher temperatures (e.g. 150 to 250 ° C), while the coefficients of friction are at least comparable are. These positive properties also exist when tin disulfide, in combination with other lubricants, represents the predominant proportion (50 to 100% by weight) of solid lubricants with a layered grid structure.
  • Lubricant composition which contained the same amount by weight of molybdenum disulfide instead of tin disulfide, determined at 20 ° C and 150 ° C.
  • the wear resistance was determined using a friction-wear tester using a rotating ring immersed in the sample oil.
  • the ring had a geometry similar to that of the Reichert test machine, which, for. B. is described in the monograph by Molykote (Zechel et al., 1991, 552 S). After heating the lubricant composition to the desired temperature, the ring was gradually loaded and the wear cap was measured. The received
  • Composition A mineral oil + 5% MoS 2 at 20 ° C
  • Composition B mineral oil + 5% SnS 2 at 20 ° C
  • Composition C mineral oil + 5% MoS 2 at 150 ° C
  • Composition D mineral oil + 5% SnS 2 at 150 ° C.
  • compositions according to the invention surprisingly deliver significantly better wear values at both 20 ° C. and 150 ° C. than the composition with
  • Molybdenum disulfide Molybdenum disulfide. The difference becomes particularly noticeable as the load increases.
  • the coefficients of friction for the lubricant composition with SnS 2 at temperatures of 150 ° C or at loads above 2000 N are comparable with those for the corresponding composition with MoS 2 . It should be noted that the molar amount of SnS 2 is 14% less than that of MoS 2 due to the higher molecular weight.

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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)
  • Inorganic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

L'invention concerne une composition de lubrifiant contenant un lubrifiant solide ayant une structure réseau à couches et 70 à 100 % en poids de sulfure stannique. Cette composition de lubrifiant a d'excellentes propriétés de lubrification et d'usure.
EP00910755A 1999-03-03 2000-03-02 Composition de lubrifiant contenant du sulfure stannique Withdrawn EP1159379A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19909352 1999-03-03
DE19909352A DE19909352A1 (de) 1999-03-03 1999-03-03 Schmierstoffzusammensetzung
PCT/EP2000/001793 WO2000052116A1 (fr) 1999-03-03 2000-03-02 Composition de lubrifiant contenant du sulfure stannique

Publications (1)

Publication Number Publication Date
EP1159379A1 true EP1159379A1 (fr) 2001-12-05

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EP00910755A Withdrawn EP1159379A1 (fr) 1999-03-03 2000-03-02 Composition de lubrifiant contenant du sulfure stannique

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EP (1) EP1159379A1 (fr)
JP (1) JP2002538265A (fr)
KR (1) KR20020009569A (fr)
CA (1) CA2365256A1 (fr)
DE (1) DE19909352A1 (fr)
WO (1) WO2000052116A1 (fr)

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JP4925404B2 (ja) * 2005-09-26 2012-04-25 日本化学工業株式会社 二硫化スズの製造方法
EP1967572A1 (fr) * 2007-02-27 2008-09-10 Setral Chemie GMBH Additif de lubrifiant
DE102010040469B3 (de) * 2010-09-09 2012-01-12 Federal-Mogul Wiesbaden Gmbh Schichtverbundwerkstoff für Gleitelemente, Verfahren zu dessen Herstellung und Verwendung
US8906834B2 (en) * 2011-02-07 2014-12-09 Sergachev Technologies Llc Metal treatment composition and method of treating rubbing surfaces

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GB956568A (en) * 1959-07-30 1964-04-29 Gen Electric Solid lubricant
GB1216091A (en) * 1967-03-20 1970-12-16 British Petroleum Co Oleophilic tin sulphides and incorporation thereof in lubricating compositions
DE3237163C2 (de) * 1982-10-07 1986-04-30 Nukem Gmbh, 6450 Hanau Verfahren zur Herstellung von Formkörpern mit guten Gleiteigenschaften
DE4340017A1 (de) * 1993-11-24 1995-06-01 Textar Gmbh Reibbelagmischung für Brems- und Kupplungsbeläge

Non-Patent Citations (1)

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KR20020009569A (ko) 2002-02-01
CA2365256A1 (fr) 2000-09-08
WO2000052116A1 (fr) 2000-09-08
DE19909352A1 (de) 2000-10-05
JP2002538265A (ja) 2002-11-12

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