EP0232895B1 - Hochtemperatur-Schraubenschmierpaste und deren Verwendung - Google Patents

Hochtemperatur-Schraubenschmierpaste und deren Verwendung Download PDF

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Publication number
EP0232895B1
EP0232895B1 EP87101809A EP87101809A EP0232895B1 EP 0232895 B1 EP0232895 B1 EP 0232895B1 EP 87101809 A EP87101809 A EP 87101809A EP 87101809 A EP87101809 A EP 87101809A EP 0232895 B1 EP0232895 B1 EP 0232895B1
Authority
EP
European Patent Office
Prior art keywords
paste
filler
tin dioxide
solid component
temperature
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
Application number
EP87101809A
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German (de)
English (en)
French (fr)
Other versions
EP0232895A3 (en
EP0232895A2 (de
Inventor
Rüdiger Dr. c/o Dow Corning GmbH Holinski
Wilhelm C/O Dow Corning Gmbh Huber
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 Deutschland GmbH
Original Assignee
Dow Corning GmbH
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Publication date
Application filed by Dow Corning GmbH filed Critical Dow Corning GmbH
Priority to AT87101809T priority Critical patent/ATE52131T1/de
Publication of EP0232895A2 publication Critical patent/EP0232895A2/de
Publication of EP0232895A3 publication Critical patent/EP0232895A3/de
Application granted granted Critical
Publication of EP0232895B1 publication Critical patent/EP0232895B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • C10M111/00—Lubrication compositions characterised by the base-material being a mixture of two or more compounds covered by more than one of the main groups C10M101/00 - C10M109/00, each of these compounds being essential
    • 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
    • C10M2201/0603—Metal compounds used as base material
    • 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
    • C10M2201/061—Carbides; Hydrides; Nitrides
    • C10M2201/0613—Carbides; Hydrides; Nitrides used as base material
    • 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
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • 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
    • C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
    • C10M2201/0623—Oxides; Hydroxides; Carbonates or bicarbonates used as base material
    • 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
    • C10M2201/0653—Sulfides; Selenides; Tellurides used as base material
    • 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
    • C10M2201/066—Molybdenum sulfide
    • C10M2201/0663—Molybdenum sulfide used as base material
    • 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
    • C10M2201/08—Inorganic acids or salts thereof
    • C10M2201/0803—Inorganic acids or salts thereof used as base material
    • 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
    • C10M2201/085—Phosphorus oxides, acids or salts
    • C10M2201/0853—Phosphorus oxides, acids or salts used as base material
    • 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
    • C10M2201/086—Chromium oxides, acids or salts
    • C10M2201/0863—Chromium oxides, acids or salts used as base material
    • 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
    • C10M2201/087—Boron oxides, acids or salts
    • C10M2201/0873—Boron oxides, acids or salts used as base material
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/1006—Compounds containing silicon used as base material
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/1023—Silicates used as base material
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
    • C10M2201/1033—Clays; Mica; Zeolites used as base material
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/105—Silica
    • C10M2201/1053—Silica used as base material
    • 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
    • C10M2201/12—Glass
    • C10M2201/123—Glass used as base material
    • 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
    • C10N2040/30—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49885—Assembling or joining with coating before or during assembling

Definitions

  • the invention relates to a high-temperature screw lubricating paste and the use of a paste based thereon as a high-temperature screw lubricant.
  • an antistatic lubricant is made from a mixture of a liquid, solid or semi-solid lubricant such as paraffin grease with 5 to 50 wt .-% of an antimony-containing tin dioxide powder described, which is to be used for lubricating the tuning head of a cassette recorder and the like.
  • a liquid, solid or semi-solid lubricant such as paraffin grease with 5 to 50 wt .-% of an antimony-containing tin dioxide powder described, which is to be used for lubricating the tuning head of a cassette recorder and the like.
  • nothing is reported about the possible suitability of this lubricant as such or after the addition of a certain filler as a high-temperature screw lubricating paste.
  • screw connections are used in order to connect the most diverse components firmly and releasably at the appropriate time.
  • these screw connections are made of high-strength materials.
  • materials made of austenitic steels or nickel-based alloys are selected for this purpose, which, in addition to their special mechanical strength and high-temperature strength, also have excellent corrosion resistance. Screw connections made from such materials are used, for example, on turbines, internal combustion engines, fittings in the chemical industry, gas generators and oil refinery plants.
  • a well-functioning lubrication namely as complete a separation of the thread flanks as possible, is essential in such screw connections.
  • high-temperature screw lubricating pastes are usually used, which are based on a wide variety of finely divided inorganic solids, which are incorporated in mineral oils and / or synthetic oils as the carrier component.
  • Nickel powder is one of the carcinogenic substances. Components containing halogen, phosphorus and sulfur decompose at high temperature to release these elements, which results in metallurgical changes and damage to the screw material.
  • the object of the invention is therefore to provide a new high-temperature screw lubricating paste or the use of a certain composite paste as a high-temperature screw lubricating paste, which does not have the above-mentioned disadvantages of the known high-temperature pastes and which is characterized primarily by the fact that they have the above under (b ) to (e) listed properties to a balanced extent.
  • a paste should particularly meet the property mentioned under (a) above, namely to ensure that the screw connections treated with it can be easily and easily loosened even after high-temperature use due to a particularly low loosening torque or breakaway torque.
  • This object is achieved according to the invention by either a new high-temperature screw lubricating paste in the form of a homogeneous paste of a finely divided inorganic solid component made of tin dioxide as a solid lubricant and a mineral and / or synthetic silicate as a filling substance in a mineral oil and / or synthetic oil as a carrier component or by using a homogeneous paste of a finely divided inorganic solid component made of tin dioxide as a solid lubricant and optionally an inert, thermally stable finely divided inorganic filler in a mineral oil and / or synthetic oil as a carrier component as a high-temperature screw lubricating paste.
  • the new high-temperature screw lubricating paste corresponding to an embodiment of the invention also contains a mineral and / or synthetic silicate as filler as a further component of the solid component.
  • a mineral and / or synthetic silicate as filler as a further component of the solid component.
  • any inert, thermally stable, finely divided inorganic filler may be present as a further component of the solid lubricant component just like the new paste according to the invention is also a mineral and / or synthetic silicate.
  • the new screw lubricant according to the invention or the paste to be used according to the invention as a high-temperature screw lubricant is distinguished by a high temperature resistance and also pressure resistance, so that it is temperature stable up to at least +1200 ° C. It is adhesive, has a high separating effect and good sealing of the thread flanks and is resistant to corrosive influences. It ensures screw connections that do not show any reduction in friction even with repeated tightening and loosening and thus have a constant preload.
  • the coefficient of friction of this screw lubricant is approximately 0.10 to 0.14 and thus roughly corresponds to the coefficient of friction of untreated and only oiled screws. It does not react with the screw material even at very high temperatures and results in a screw connection that can be detached again without problems and which, above all, has a much lower release torque or breakaway torque than the various known high-temperature pastes.
  • the special behavior of the high-temperature screw lubricating paste according to the invention or of the paste to be used according to the invention as a high-temperature screw lubricating paste compared to the known high-temperature screw lubricants is based primarily on the new element of using tin dioxide as the exclusive or essential component of the solid component.
  • This compound is extremely stable to high temperatures and has no melting point, but rather sublimes at temperatures above about 1800 ° C.
  • the particles of the finely divided inorganic solid component which either consist of tin dioxide alone or a mixture thereof with an inert filler of the type specified , do not melt on the surface and sinter together, so that there can be neither a sticking of the screw connections nor a change in the structure of their material.
  • tin (IV) oxide can be used as tin dioxide according to the invention, which is in powdered and thus sufficiently finely divided form.
  • tin dioxide types are suitable for this purpose, which are also used in the ceramic industry in particular for the production of colored bodies and for tempering and tarnishing glazes, frits and enamel.
  • These types of tin dioxide usually have a tin dioxide content of at least 99% and up to 99.9% and thus contain only minor impurities in other metals such as iron, nickel, chromium, aluminum and silicon. Their specific weight is approximately 6.9 g / cm 3.
  • the grain distribution of such tin dioxide types is normally 0.4 to 60 gm, the grain maximum usually being between 0.5 and 5 ⁇ m.
  • Tin dioxide types suitable according to the invention have, for example, bulk densities of approximately 700 to 250 g / l, bulk densities of approximately 1000 to 350 g / l and surfaces of approximately 10000 to 45000 cm2 / g.
  • high-temperature screw lubricating pastes are preferably used above all pastes whose solid component consists practically only of tin dioxide, since screw connections treated with such pastes result in particularly favorable, namely low, loosening torques or breakaway torques after high-temperature use.
  • Tin dioxide is, however, relatively expensive, so that high-temperature screw lubricating pastes, the solid component of which consists only of tin dioxide, are only used where a paste that ensures particularly low release moments or breakaway moments must be provided in extreme high-temperature use or other unfavorable conditions.
  • the high-temperature screw lubricating pastes according to the invention therefore generally contain only so much tin dioxide that the sufficiently low release torques or breakaway torques required for the respective application result, and for reasons of economy, pastes with somewhat higher release torques or breakaway torques are also used, some of which are used of the tin dioxide is replaced by another solid component, namely by an inert, thermally stable, finely divided inorganic filler. In such pastes, mixtures of tin dioxide and a suitable filler of this type are used.
  • the high-temperature screw lubricating paste generally contains such amounts of solid component - be it just tin dioxide or a mixture of tin dioxide and a filler - that is in Depending on the type and viscosity of the respective carrier component, a paste-like paste results, namely a spreadable paste.
  • the amounts and ratios of tin dioxide and any filler present in the high-temperature screw lubricating paste are therefore dependent on the product data of the respective components, such as their specific weight, grain size and grain distribution, bulk density, bulk density, surface, geometric shape and the like.
  • the solid component in the high-temperature screw lubricating paste according to the invention preferably makes up about 30 to 75 percent by weight, and in particular about 40 to 60 percent by weight, of the paste, a paste containing only tin dioxide as a solid component generally containing about 45 to 55 percent by weight of tin dioxide.
  • the solid component also contains a finely divided inorganic filler, this is generally present in an amount which corresponds to a weight ratio of tin dioxide to filler of 1 to more than 0 to 3.
  • a weight ratio of tin dioxide to filler of 1 to more than 0 to 3.
  • the tolerable weight ratio of tin dioxide to filler is of course also dependent on the type and composition of the filler present in each case, so that high-temperature screw lubricating pastes which contain more than three times the amount of filler in relation to the amount of tin dioxide are generally no longer expedient.
  • high-temperature screw lubricating pastes are therefore also preferred, in the solid component of which the tin dioxide and the filler in a weight ratio of 1: 1 to 1: 3, and in particular of 1: 1.5 to 1: 2.5, are present.
  • a weight ratio of tin dioxide to filler of about 1: 2 is very particularly preferred.
  • the fine-particle inorganic filler to be used in the high-temperature screw lubricating paste can be any material which is inert and thermally stable up to the respective maximum application temperatures, for example at least +1200 ° C.
  • any material can be used as a filler that has previously been used as a proportional or only solid component in known high-temperature pastes.
  • all materials are excluded which are not stable to tin dioxide or the materials forming the screw connection during the respective high-temperature use, ie which melt, decompose or give off corrosive or toxic components or are already toxic from the outset.
  • the filler to be used according to the invention is sufficiently fine-particle in accordance with the present application, and in this context it can be, for example, granular, fibrous or flaky. Its particle size distribution is generally about 0.5 to 80 ⁇ m, and fibrous fillers can normally have a diameter of about 2 to 10 ⁇ m and a length of up to 3 mm. With respect to all of these particle size specifications, deviations are of course possible both downwards and upwards, and the selection of the appropriate particle size depends on the type and composition of the respective filler and is familiar to the person skilled in the art with the present technology.
  • fillers In general, a wide variety of mineral and / or synthetic silicates or metal oxides or heavy metal powder can be used as fillers, which meet the above-mentioned conditions of such a filler and which are stable up to temperatures of at least +1200 ° C for extreme applications.
  • Fillers preferred according to the invention are mineral and / or synthetic inosilicates, namely so-called chain silicates, double chain silicates or ribbon silicates, such as a wide variety of fibrous or stem-like asbestos, serpentines or hornblende, and / or phyllosilicates, namely the so-called leaf silicates or layered silicates, such as a wide variety of sheet-like or layered mica , the most important of which are biotite and muscovite.
  • mineral and / or synthetic inosilicates namely so-called chain silicates, double chain silicates or ribbon silicates, such as a wide variety of fibrous or stem-like asbestos, serpentines or hornblende, and / or phyllosilicates, namely the so-called leaf silicates or layered silicates, such as a wide variety of sheet-like or layered mica , the most important of which are biotite and muscovite.
  • mineral fillers of this type it is also possible to use corresponding synthetic products which are covered by the collective name mineral fibers and which are, for example, rock fibers and slag fibers. Ceramic fibers, which have become increasingly important in recent times, are also suitable as fillers according to the invention, especially since they are notable for high temperature resistance. Fillers preferred according to the invention are therefore based on asbestos and / or mica and / or synthetic mineral fibers related to them in terms of composition and structure.
  • a suitable as a filler and commercially available asbestos is for example Asarco 7 D4 BL from Lake Asbestos, CA-Quebeck, with an average particle diameter of 2 to 10 ⁇ m and a length of about 3 mm.
  • Suitable fillers and also commercially available mica types are, for example, the so-called English mica mica, which are available from Georg M. Langer & Co. (LANCO), D-2863 Ritterhude. These mica have an average chemical composition of approximately 48% silicon dioxide, 33% aluminum oxide, 10% potassium oxide, 2% iron oxide, 0.80% sodium oxide, 0.70% magnesium oxide, 0.65% titanium dioxide and 0.50% calcium oxide, whereby the rest is made up of other elements and moisture.
  • the particle size of such mica ranges between 5 and 75 11 m with maximum particle sizes between 25 and 150 11 m, and they have an oil number between about 50 and 75.
  • the types of mica offered by this company under the type designations M, P and P1000 differ practically only in their particle size and their oil number, the type M having an average particle size of 5 to 10 ⁇ m with a maximum particle size of 25 gm and a Has an oil number of 75.
  • the use of asbestos is encountering increasing health concerns, so that there are already a number of asbestos-like synthetic substitute products that largely combine the particularly advantageous properties of asbestos without having any toxic side effects.
  • These replacement products belong to the group of synthetic mineral fibers already mentioned, such as the so-called inorphil fibers, which are sold by the company Laxa Bruk, S-Laxa, under this name.
  • the Inorphil 060 product has a density of about 2.75 and a hardness (Mohs) of about 6 to 6.5, and it has an average percentage composition of 46% silicon dioxide, 16% calcium oxide, 12% magnesium oxide, 15% aluminum oxide , 2.5% sodium oxide, 1.5% titanium dioxide, 6.5 iron oxides and 0.5% rest.
  • Synthetic fibers of this type are also examples of fillers which can be used with advantage in the high-temperature screw lubricating paste according to the invention.
  • metal oxides corresponding to the conditions already set out can also be used as fillers in the present screw lubricating paste, namely in particular thermally stable metal oxides which are, for example, temperature stable up to at least +1200 ° C. and of course also inert.
  • thermally stable metal oxides which are, for example, temperature stable up to at least +1200 ° C. and of course also inert.
  • metal oxides although less preferred as fillers, include a wide variety of iron oxides, titanium dioxide, magnesium oxide or barium oxide.
  • the specific weight of these oxides does not differ significantly from the specific weight of the silicates preferred as fillers, so that they are normally also used in appropriate amounts and also in proportions to the tin dioxide. Of course, they can also be used in a mixture with silicate fillers.
  • Heavy metal powder can also be used with these high-temperature screw lubricating pastes as fillers or constituents of the fillers, even if these are not particularly preferred.
  • Such heavy metal powders must of course in turn meet the basic requirements to be met with fillers suitable according to the invention.
  • Examples of such heavy metal powders include titanium powder, molybdenum powder and chrome powder. These, too, can in turn be used in a mixture with other fillers, but because of the much higher specific weight of the heavy metal powders compared to the other fillers, there is then generally a need to use these heavy metal powders in higher amounts than the fillers with a lower specific weight. Their maximum proportion by weight is therefore usually increased by about 20 to 35 percent by weight compared to the maximum proportion by weight of the other fillers.
  • the carrier component present in the high-temperature screw lubricating paste can be any mineral oil and / or synthetic oil, as is also used in known screw lubricating pastes of this type. It only serves as a carrier component for the solid component present in such screw lubricating pastes and is used in an amount such that the required spreadable paste results in connection with the type and amount of the respective solid component.
  • Mineral or synthetic carrier components suitable according to the invention have, for example, a kinematic viscosity in the range from 60 to 250 mm 2 / s at 50 ° C. and, in the case of mineral oils, are so-called highly viscous base oils or naphthenic-based lubricating oils.
  • mineral oils are usually preferred, especially white oils, since they are practically sulfur free.
  • synthetic oils which are preferably one or more esters of saturated mono- and / or dicarboxylic acids with monohydric or polyhydric alcohols, can also be used in part or even in total.
  • the high-temperature screw lubricating paste can also contain small amounts of other additives customary for such pastes, for example paste stabilizers, corrosion inhibitors or color pigments , provided that these additives do not impair the essential properties desired for such screw lubricating pastes.
  • additives are, for example, very finely divided silicon dioxide, bentonite or aluminum powder, the latter being present only in such a small amount that the respective paste is given a silvery metallic appearance.
  • tin dioxide tin (IV) oxide content 99.9%, particle size distribution 0.4 to 60 ⁇ m, bulk density about 500 g / l, bulk density about 600 g / l, surface area
  • tin dioxide tin (IV) oxide content 99.9%, particle size distribution 0.4 to 60 ⁇ m, bulk density about 500 g / l, bulk density about 600 g / l, surface area
  • product TEGO-VN product TEGO-VN
  • the paste obtained is then completely homogenized using a laboratory three-roll mill.
  • Example 2 Using the method described in Example 1, 330 g of tin dioxide and 660 g of mica with an average particle size of 5 to 10 ⁇ m, a maximum particle size of 25 gm and an oil number of 75 (English Mica mica, type M, Georg M. Langer & Co.) with 1010 g of paraffinic mineral oil to a homogeneous paste (the mica used has a moisture content of 0.10% and has an average percentage composition of 47.9% silicon dioxide, 33.1% aluminum oxide, 9.8% potassium oxide , 2.1% iron oxide, 0.8% sodium oxide, 0.7% magnesium oxide, 0.65% titanium dioxide, 0.50% calcium oxide and other constituents as the remainder).
  • the mica used has a moisture content of 0.10% and has an average percentage composition of 47.9% silicon dioxide, 33.1% aluminum oxide, 9.8% potassium oxide , 2.1% iron oxide, 0.8% sodium oxide, 0.7% magnesium oxide, 0.65% titanium dioxide, 0.50% calcium oxide and other constituents as the remainder).
  • the procedure is analogous to that described in Example 2, but instead of mica, the same amount of mineral fiber Inorphil 060 with a total fiber length of less than 250 ⁇ m, of which more than 5% has a fiber length of less than 63 ⁇ m, is used.
  • This fiber is an asbestos-like synthetic fiber with an average percentage composition of 46% silicon dioxide, 16% calcium oxide, 12% magnesium oxide, 15% aluminum oxide, 2.5% sodium oxide, 1.5% titanium dioxide, 6.5% iron oxides and 0.5 % other ingredients.
  • 8xM16x60 bolts material No. 4980, nut M16, material No. 4981, washer, material No. 4986, are used as test specimens for the high-temperature screw test.
  • the test cycle is 21 hours at 650 ° C.
  • Tightening torque and breakaway torque are measured with a conventional torque wrench.
  • the coefficient of friction is determined on a customary, separate screw test bench.
  • the present high-temperature screw lubricant was also tested at application temperatures of 900 ° C for a period of six months, whereby no changes in the screw material could be found and the screw connection could be loosened properly after this high-temperature use.

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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)
EP87101809A 1986-02-10 1987-02-10 Hochtemperatur-Schraubenschmierpaste und deren Verwendung Expired - Lifetime EP0232895B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87101809T ATE52131T1 (de) 1986-02-10 1987-02-10 Hochtemperatur-schraubenschmierpaste und deren verwendung.

Applications Claiming Priority (2)

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DE19863604104 DE3604104A1 (de) 1986-02-10 1986-02-10 Hochtemperatur-schraubenschmierpaste
DE3604104 1986-02-10

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EP0232895A2 EP0232895A2 (de) 1987-08-19
EP0232895A3 EP0232895A3 (en) 1988-09-14
EP0232895B1 true EP0232895B1 (de) 1990-04-18

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EP (1) EP0232895B1 (fa)
JP (1) JPS63392A (fa)
AT (1) ATE52131T1 (fa)
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DE (2) DE3604104A1 (fa)

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DE4121488A1 (de) * 1991-06-26 1993-01-14 Mannesmann Ag Verfahren zur vorbehandlung der verbindungselemente einer gasdichten muffen-rohrverbindung
US5308515A (en) * 1992-07-17 1994-05-03 Steven Bruce Michlin Method for lubricating a copier or printer with a dry lubricant formulation
LT3511B (en) 1993-06-21 1995-11-27 Julius Klicius Lubricant with antifriction mineral additive
WO2010122022A1 (de) * 2009-04-21 2010-10-28 Ceramtec Ag Schraubenverbindungen auf zerspanungswerkzeugen
IT1394368B1 (it) * 2009-05-26 2012-06-15 Galassi Dispositivo di verniciatura a spruzzo.
MX388621B (es) 2018-05-10 2025-03-20 Cocam Int Enterprises Ltd Marco de hamaca que se sostiene solo portátil con hamaca acortada y método para suspender la hamaca acortada en un marco
GB2591116B (en) * 2020-01-16 2023-12-27 Woolstencroft David Method of protecting a fixing

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US459789A (en) * 1891-09-22 Domestic vapor-burner
US2671758A (en) * 1949-09-27 1954-03-09 Shell Dev Colloidal compositions and derivatives thereof
NL82973C (fa) * 1950-12-30
US2754266A (en) * 1953-10-29 1956-07-10 Union Oil Co Corrosion resistant electrically conductive thread compound
US2960467A (en) * 1955-12-16 1960-11-15 Pure Oil Co Agglomerated inorganic gelling agents for oleaginous vehicles
US3010896A (en) * 1959-08-26 1961-11-28 Texaco Inc Extreme pressure lubricant containing asbestos fibers
US3309313A (en) * 1961-08-23 1967-03-14 Kenmore Res Company High-temperature lubricating composition
GB1215436A (en) * 1968-04-11 1970-12-09 Exxon Research Engineering Co Thickeners for greases
JPS53113804A (en) * 1977-03-16 1978-10-04 Hitachi Ltd Grease composition
JPS606989B2 (ja) * 1981-09-04 1985-02-21 三菱マテリアル株式会社 帯電防止潤滑剤

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EP0232895A3 (en) 1988-09-14
DE3604104C2 (fa) 1988-04-07
DE3604104A1 (de) 1987-08-13
CA1285547C (en) 1991-07-02
DE3762370D1 (de) 1990-05-23
JPS63392A (ja) 1988-01-05
EP0232895A2 (de) 1987-08-19
ATE52131T1 (de) 1990-05-15
US4755308A (en) 1988-07-05

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