DE3224784C2 - Cable lubricant - Google Patents

Cable lubricant

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Publication number
DE3224784C2
DE3224784C2 DE3224784A DE3224784A DE3224784C2 DE 3224784 C2 DE3224784 C2 DE 3224784C2 DE 3224784 A DE3224784 A DE 3224784A DE 3224784 A DE3224784 A DE 3224784A DE 3224784 C2 DE3224784 C2 DE 3224784C2
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DE
Germany
Prior art keywords
lubricant
molecular weight
cable
weight
polyglycol
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
Application number
DE3224784A
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German (de)
Other versions
DE3224784A1 (en
Inventor
Werner Götze
Horst Dipl.-Chem. Dr. 1000 Berlin Kreuschner
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.)
Siemens AG
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Siemens AG
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Application filed by Siemens AG filed Critical Siemens AG
Priority to DE3224784A priority Critical patent/DE3224784C2/en
Publication of DE3224784A1 publication Critical patent/DE3224784A1/en
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Publication of DE3224784C2 publication Critical patent/DE3224784C2/en
Expired 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
    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • 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
    • C10M125/10—Metal 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
    • C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
    • C10M125/26—Compounds containing silicon or boron, e.g. silica, sand
    • C—CHEMISTRY; METALLURGY
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
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    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/28—Polyoxyalkylenes of alkylene oxides containing 2 carbon atoms only
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    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/30—Polyoxyalkylenes of alkylene oxides containing 3 carbon atoms only
    • 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
    • C10M145/00—Lubricating compositions characterised by the additive being a macromolecular compound containing oxygen
    • C10M145/18—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M145/24—Polyethers
    • C10M145/26—Polyoxyalkylenes
    • C10M145/32—Polyoxyalkylenes of alkylene oxides containing 4 or more carbon atoms
    • 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
    • C10M2201/02—Water
    • C—CHEMISTRY; METALLURGY
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    • 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
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/087—Boron oxides, acids or salts
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/10—Compounds containing silicon
    • C—CHEMISTRY; METALLURGY
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/10—Compounds containing silicon
    • C10M2201/102—Silicates
    • C10M2201/103—Clays; Mica; Zeolites
    • 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
    • C10M2201/10—Compounds containing silicon
    • C10M2201/105—Silica
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/104—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing two carbon atoms only
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    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/105—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing three carbon atoms only
    • 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
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/106—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of alkylene oxides containing four carbon atoms only
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
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    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/10—Macromolecular compoundss obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/103—Polyethers, i.e. containing di- or higher polyoxyalkylene groups
    • C10M2209/107—Polyethers, i.e. containing di- or higher polyoxyalkylene groups of two or more specified different alkylene oxides covered by groups C10M2209/104 - C10M2209/106
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    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
    • C10N2020/01—Physico-chemical properties
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/30—Refrigerators lubricants or compressors lubricants
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/32—Wires, ropes or cables lubricants
    • C—CHEMISTRY; METALLURGY
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    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/34—Lubricating-sealants
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    • C10N2040/36—Release agents or mold release agents
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    • C10N2040/38—Conveyors or chain belts
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    • C10N2040/40—Generators or electric motors in oil or gas winning field
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    • C10N2040/42—Flashing oils or marking oils
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    • C10N2040/44—Super vacuum or supercritical use
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    • C10N2040/50—Medical uses

Abstract

Das neue Kabelgleitmittel enthält außer hochmolekularem Polyäthylenglykol und Wasser mittelmolekulare Polyglykole und einen hochdispersen Füllstoff. Das neue Gleitmittel ist universell einsetzbar, läßt sich leicht auf der Kabeloberfläche verteilen und zeichnet sich durch eine hohe Standzeit aus.In addition to high molecular weight polyethylene glycol and water, the new cable lubricant contains medium molecular weight polyglycols and a highly dispersed filler. The new lubricant can be used universally, is easy to spread over the surface of the cable and is characterized by a long service life.

Description

Die Erfindung liegt auf dem Gebiet der Verlegctechnik für elektrische und optische Kabel und ist bei der Compoundierung eines Gleitmittels anzuwenden, mit dem beim Einziehen solcher Kabel in Rohrsysteme die Reibungsverhiiltnisse verbessert werden sollen.The invention is in the field of laying technology for electrical and optical cables and is in compounding a lubricant to reduce the friction when pulling such cables into pipe systems should be improved.

Beim Einziehen von elektrischen Kabeln und optischen Kabein in Rohrsysteme aus Polyvinylchlorid, PoIyiithylcn. Asbestzement, glasfaserverstärkten Kunststoffen, Ton oder Beton werden Schmiermittel benötigt, um die Halt- und Gleitreibung zu verringern. Als Schmiermittel sind beispielsweise Gieitfette und aufgekochte, alkalifreie Schmierseife gebrauchlich (»Kabel und Leitungen für Starkstrom«, L. Heinhold. Siemens AG, i%9. Seite 438). Ein anderes bekanntes, in neuerer Zeil entwickeltes Gleitmittel besteht aus einer Lösung von Alkohol in Wasser, wobei diese Lösung 0.5 bis 5 Gew.-"., eines Polyäthylenoxids mit einem Molekulargewicht von 10( bis 5 · 10" enthält. Der Alkoholanteil (Methanol, Äthanol oder Isopropanol) liegt bei 5 bis 5(1 Gew.-",,. Dieses Gleitmittel kann flüssig aufgetragen und auch bei frostiger Witterung eingesetzt werden und hinterläßt nach Verdunstung von Alkohol und Wasser, keine schlüpfrigen Rückstände (kurze Standzeit bei Gehrauch) (US-PS 39 25 216). Als nachteilig hinsichtlich der Handhabung dieses Gleitmittels wird dessen stark faiienziehendc Konsistenz angesehen.When pulling electrical cables and optical cables into pipe systems made of polyvinyl chloride, polyethylene. Asbestos cement, glass fiber reinforced plastics, clay or concrete, lubricants are required to reduce the holding and sliding friction. For example, lubricants and boiled, alkali-free soft soap can be used as lubricants ("Cables and Lines for Heavy Current", L. Heinhold. Siemens AG, i% 9, page 438). Another known lubricant, which has been developed recently, consists of a solution of alcohol in water, this solution containing 0.5 to 5% by weight of a polyethylene oxide with a molecular weight of 10 ( to 5 x 10 ". The alcohol content (methanol, Ethanol or isopropanol) is 5 to 5 (1 wt .- ",,. This lubricant can be applied as a liquid and also used in frosty weather and does not leave any slippery residues after evaporation of alcohol and water (short standing time with non-smokers) (US -PS 39 25 216). A disadvantage with regard to the handling of this lubricant is its highly attractive consistency.

Ausgehend von diesem bekannten, die Merkmale des Oberbegriffes des Anspruches 1 .iilweiscnden Gleitmittel liegt der Erfindung die Aufgabe zugrunde, ein Gleitmittel zu schaffen, das eine größere Standzeit aufweist, sich leicht auf die jeweilige Kabelohcrlläche auftragen lill.lt und darüber hinaus mit allen für Kabelmäntel und Rohrsysterne verwendeten Werkstoffen verträglich ist.Based on this known, the features of the preamble of claim 1 .iilweiscnden lubricant The invention is based on the object of a lubricant to create, which has a longer service life, can be easily applied to the respective cable tube surface and is also compatible with all materials used for cable jackets and pipe systems.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung vorgesehen, daß das Gleitmittel als Stabilisator ein Polyglykol oder einen Polyglx kohalbäther mit einem Molekulargewicht von 2 ■ K)' bis 2 HV1 enthält und dal.l dem Gleitmittel als weitere Komponente ein hochdisperser Füllstoff in einer Menge von 0,5 bis 10 Gew.-% beigefügt ist.
Das neue Gleitmittel ist hinsichtlich seiner Konsistenz eine mittelviskose Paste, die wenig fadenziehend ist, beim Auftragen auf den jeweiligen Kabelmantel aus beispielsweise Poylüthylen oder Polyvinylchlorid die Oberflächen gut benetzt und sich leicht verteilen läßt. Aufgrund seiner thixotropen Eigenschaft und der nur wenigTo solve this problem, the invention provides that the lubricant contains as a stabilizer a polyglycol or a Polyglx kohalbäther with a molecular weight of 2 ■ K) 'to 2 HV 1 and dal.l the lubricant as a further component of a highly dispersed filler in an amount from 0.5 to 10 wt .-% is added.
In terms of its consistency, the new lubricant is a paste of medium viscosity, which is not very stringy, when applied to the respective cable jacket made of, for example, polyethylene or polyvinyl chloride, the surfaces are well wetted and can be easily distributed. Because of its thixotropic property and only a little

ίο fadenziehenden Konsistenz kann das KabelgleitmiUel auch mit einer trichterartigen Auftragsvorrichtung deren welchelastomeres Mundstück gezahnt ist, auf die Kabeloberfläche gleichmäßig aufgetragen werden. Wegen der guten Benetzung und der hervorragenden Schmiereigenschäften kann in aller Regel auf eine vorhergehende Verteilung des Gleitmittels in dem Rohrsystem mit Hilfe eines Molches verzichtet werden.ίο thread-pulling consistency can be the cable lubricant also with a funnel-like application device, the elastomeric mouthpiece of which is toothed, onto the cable surface applied evenly. Because of the good wetting and the excellent lubricating properties can usually on a previous distribution of the lubricant in the pipe system with the help a pig can be dispensed with.

Insbesondere beim Einziehen von schweren Kabeln wie beispielsweise 110-kV-Starkstromkabeln mil PE-Mantel läßt sich das sonst durch Haftreibung und KaItverschweißung von Mantel und Rohrwandung bedingte Ruckgleiten vermeiden, so daß sich ein nahezu lineares Ziehkraftdiagramm ergibt.Especially when pulling in heavy cables such as 110 kV power cables with a PE sheath can otherwise be caused by static friction and cold welding of the jacket and pipe wall Avoid stick-slip so that an almost linear drawing force diagram results.

Der Wasseranteil des neuen Gleitmittels verhindert mit seinem großen Wärmeaufnahmevermögen lokale Kalt verseil weißungen beim Einziehen und stabilisiert die nebcnvalenten l: ndungen zwischen den mittelmolekularcn Polyglykolen und dem superhochmolekularen l'olyäihylenglykol. Die mittelmolekularen PolyglykoleThe water content of the new lubricant prevented with its large heat capacity local cold stranding weißungen during insertion and stabilizes the nebcnvalenten l: inventions between the mittelmolekularcn polyglycols and the super high molecular l'olyäihylenglykol. The medium molecular weight polyglycols

3(1 und Polyglykohalbälher. die insbesondere als polymere Mischäther aus Alhylenoxid und Propyienoxid oder als Polypropylenglykole /um Einsatz kommen, geben der Masse eine Grundviskosität, die durch den Zusatz der superhoclviolckularen Polyälhylenglykolc auch unter 3 (1 and polyglyco half ethers, which are used in particular as polymeric mixed ethers of ethylene oxide and propylene oxide or as polypropylene glycols, give the composition a basic viscosity

J'' extremsten Lastbedingungen beim Anziehen während des Einzlehcns eines Kabels das Abreißen des Schmierfilms zuverlässig verhindern. J '' reliably prevent the tearing of the lubricating film in the most extreme load conditions when a cable is pulled in while it is being leaned in.

Durch den Zusatz eines hochdispersen Füllstoffes, der als Verdickungsmittel wirkt, wird dem Gleitmittel im übrigen eine thixotropc Struktur verliehen, die sich beim Aufbringen der Masse und hinsichtlich der größeren Standzeit vorteilhaft auswirkt. Das Gleitmittel ist auch noch nach Verdunsten des Wasseranteils geschmeidig und somit verwendbar. Als hochdisperse Füllstoffe kommen insbesondere inerte Verdickungsmittel wie Kieselsäure. Aluminiumoxid. Asbestpulver oder ein Verdikkiingsnilttel auf Silikatbasis wie beispielsweise Aluminiumhydrosilikat in Betracht.
Sehr geringe Zugkräfte und ein ruckfreics Gleiten wur-The addition of a highly dispersed filler, which acts as a thickener, gives the lubricant a thixotropic structure, which has an advantageous effect when the mass is applied and with regard to the longer service life. Even after the water has evaporated, the lubricant is pliable and can therefore be used. Inert thickeners such as silica are particularly suitable as highly disperse fillers. Alumina. Asbestos powder or a silicate-based Verdikkiingsnilttel such as aluminum hydrosilicate into consideration.
Very low tensile forces and jerk-free sliding were

'' den bei Kabcleinziehvcrsuchcn mit einem Gleitmittel folgender Rezeptur erzielt:`` When trying to pull in cables, use a lubricant the following recipe achieved:

1 Gew.-·,, Polyälhylcnglykul mit einem Molekulargewicht von 5 K)''.1 wt. · ,, Polyälhylcnglykul with a molecular weight of 5 K) ''.

" 24 Gew.-1·,, Polyglykol in Form eines polymeren"24% by weight 1 · ,, polyglycol in the form of a polymer

Miscliäthcrs aus Ähtylcnoxid und Propyienoxid mit einem Molekulargewicht von 3.8 ■ K)'.Mixtures of ethylene oxide and propylene oxide with a molecular weight of 3.8 K) '.

3 Gew.-".. speziell aufgeschlossenes Asbestpulver,
W) 72 Grw.-",. Wasser.3 wt. ".. specially digested asbestos powder,
W) 72 Grw.- ",. Water.

Claims (2)

Patentansprüche:Patent claims: 1. Gleitmittel zum Einziehen von elektrischen oder optischen Kabeln in Rohrsysteme, bestehend aus 0,5 bis 5 Gew.-% eines Polyäthylenglykols mit einem Molekulargewicht von 105 bis 5 · 10\ einem Stabilisator in einer Menge von 5 bis 50 Gew.-t und Rest Wasser, dadurch gekennzeichnet, daß es als Stabilisator eine Polyglykol oder einen Polyglykolhalbäther mit einem Molekulargewicht von 2 ■ 10' bis 2 · 104 enthalt und daß dem Gleitmittel als weitere Komponente ein hochdisperser Füllstoff in einer Menge von 0,5 bis 10 Gew.-1O beigefügt ist.1. Lubricant for pulling electrical or optical cables into pipe systems, consisting of 0.5 to 5% by weight of a polyethylene glycol with a molecular weight of 10 5 to 5 · 10 \ a stabilizer in an amount of 5 to 50% by weight and the remainder water, characterized in that it contains a polyglycol or a polyglycol half-ether with a molecular weight of 2 · 10 'to 2 · 10 4 as a stabilizer and that the lubricant contains a highly dispersed filler in an amount of 0.5 to 10 wt .- 1 O is attached. 2. Gleitmittel nach Anspruch 1, dadurch gekennzeichnet, daß es als hochdispersen Füllstoff Kieselsäure, Aluminiumoxid, Astbestpulver oder ein Verdickungsmittel auf Silikatbasis enthält.2. Lubricant according to claim 1, characterized in that it is the highly disperse filler silica, Contains aluminum oxide, knot powder, or a silicate-based thickener.
DE3224784A 1982-07-01 1982-07-01 Cable lubricant Expired DE3224784C2 (en)

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DE1101551B (en) * 1952-05-12 1961-03-09 Robert Hoehn Dipl Ing Highly flexible, multi-core, insulated electrical cable
US3925216A (en) * 1974-09-13 1975-12-09 American Polywater Lubricating composition for conduits and raceways
US4051884A (en) * 1974-12-04 1977-10-04 Dunlop Limited Pneumatic tire containing gel lubricant
CA1126718A (en) * 1978-02-07 1982-06-29 Torao Nagura Lubricant for plastic working
DE2806133A1 (en) * 1978-02-14 1979-08-16 Hoechst Ag Transmission lubricants based on polyoxyalkylene glycol di:ether(s) - with high shear strength and viscosity index
DE2925662C2 (en) * 1979-06-26 1982-09-09 Th. Goldschmidt Ag, 4300 Essen Lubricants and mold release agents for tire manufacture

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