DE2143848C3 - Schmierfett - Google Patents

Schmierfett

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Publication number
DE2143848C3
DE2143848C3 DE2143848A DE2143848A DE2143848C3 DE 2143848 C3 DE2143848 C3 DE 2143848C3 DE 2143848 A DE2143848 A DE 2143848A DE 2143848 A DE2143848 A DE 2143848A DE 2143848 C3 DE2143848 C3 DE 2143848C3
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DE
Germany
Prior art keywords
weight
percent
acid
grease
terpolymer
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
DE2143848A
Other languages
English (en)
Other versions
DE2143848A1 (de
DE2143848B2 (de
Inventor
Richard James Larel Springs N.J. Petrucco
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.)
ExxonMobil Oil Corp
Original Assignee
Mobil Oil Corp
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 Mobil Oil Corp filed Critical Mobil Oil Corp
Publication of DE2143848A1 publication Critical patent/DE2143848A1/de
Publication of DE2143848B2 publication Critical patent/DE2143848B2/de
Application granted granted Critical
Publication of DE2143848C3 publication Critical patent/DE2143848C3/de
Expired legal-status Critical Current

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Description

(1) mindestens 65 Gewichtsprozent Äthylen,
(2) mindestens 5 Gewichtsprozent Vinylester von gesÀttigten aliphatischen CarbonsÀuren, mit 1 bis 6 C-Atomen, Alkylacrylate, Alkylmethacry-Iate, Dialkylmaleate und Dialkylfumarate aliphatischer Alkohole mit 1 bis 6 C-Atomen und
(3) 0,01 bis 3 Gewichtsprozent eines Monomeren aus AcrylsĂ€ure, MethacrylsĂ€ure, ItaconsĂ€ure, MaleinsĂ€ure und FumarsĂ€ure, aus dem Anhydrid der ItaconsĂ€ure, der MaleinsĂ€ure und der 1Q FumarsĂ€ure, aus Alkylhydrogen-maleaten und Alkylhydrogen-fumaraten, aus Monoacrylaten und Monomethacrylaten von Glykolen, 2-Hydroxy-3-aminopropylalIylĂ€ther, AllylglycerinĂ€ther, Divinylglykol, 2-DimethylaminoĂ€thyl- ?r acrylat, 2-DimethyIaminoĂ€thyImethacrylat und N-Vinylpyrrolidon umfaßt.
2. Schmierfett nach Anspruch 1, dadurch gekennzeichnet, daß das Terpolymer 20 bis 30 Gewichtsprozent der Komponente (2) und 0,1 bis 1 jo Gewichtsprozent der Komponente (3) enthĂ€lt.
3. Schmierfett nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Komponente (2) aus Vinylacetat, Äthylacrylat oder Methylmethacrylat besteht. 3r>
4. Schmierfett nach einem der AnsprĂŒche 1 bis 3, dadurch gekennzeichnet, daß die Komponente (3) aus AcrylsĂ€ure oder MethacrylsĂ€ure besteht.
Die Erfindung betrifft ein Schmierfett auf der Basis eines SchmiermitteltrĂ€gers, eines Verdickungsmittels und eines Äthylencopolymeren als Verbesserungsmittel. v>
Es wurden bereits Äthylen-Vinylacetat-Copolymere in Schmierfette einverleibt, um deren BestĂ€ndigkeit gegen das Auswaschen mit Wasser zu verbessern. Bei bestimmten Schmierfetten jedoch hat sich der Gebrauch solcher Copolymere als nicht zweckmĂ€ĂŸig erwiesen z. B. bei AnsĂ€tzen, deren Verdickung durch Calcium-Blei-Komplexe bewirkt war, bei weichen keine ausgeprĂ€gte BestĂ€ndigkeit gegen das Auswaschen mit Wasser festzustellen war. DarĂŒber hinaus wurde ermittelt, daß solche Schmierfette wie auch andere ĂŒbliche Verdickungsmittel enthaltende Schmierfette nicht nur eine geringe BestĂ€ndigkeit gegen das Auswaschen mit Wasser aufweisen, sondern auch dazu neigen, bei hoher Temperatur der Umgebung zu erweichen und auszusickern.
So werden weiterhin in der DE-AS 12 78 056 Schmierfette beschrieben, die neben einem Mineralöl, einem Verdickungsmittel, und einer FettsĂ€uremetallseife ein Polyolefin wie ein öllösliches ataktisches Polypropylen oder ein Äthylen/Propylen-Copolymeres enthalten. Diese Schmierfette sollen eine Verringerung der Wasserauswaschung zeigen. Es wird jedoch mit diesem bekannten Schmiermittel noch keine ausreichende BestĂ€ndigkeit gegenĂŒber Hochtemperaiurerweichung und Aussickern er/ielt.
In der DE-AS 11 24 174 und der US-Patentschrift 30 83 103 sind Schmierfette beschrieben, die Metallseifer. organischer SĂ€uren und eine kleine Menge eines öllöslichen Copolymeren, welches aus Estermonomeren aufgebaut ist, enthalten. Die gemĂ€ĂŸ diesen Literaturstellen als Verdickungsmittel dienenden Metallseifen dĂŒrften sich bei höheren Temperaturen zersetzen.
Metallsalze von Copolymeren sind als Geiierungsmittel, d.h. Verdickungsmittel, fĂŒr Schmierfette in den US-Patentschriften 26 98 298 und 26 98 299 und der britischen Patentschrift 7 20 487 beschrieben. Die damit erhaltenen Fette weisen jedoch ebenfalls keine zufriedenstellende WasserauswaschbestĂ€ndigkeit und keine guten Hochtemperaturerweichungseigenschaften auf.
Die in der US-Patentschrift 30 06 942 und Chem. Abstract 1970, Bd. 73, Nr. 16 beschriebenen Schmierfette sind aus Wachsen hergestellt und zeigen infolgedessen eine schlechte HochtemperaturstabilitĂ€t. Die US-Patentschrift 31 14 708 beschreibt Gemische aus Polymeren und Ölen, die in Form von trockenen Feststoffen vorliegen, die gepulvert oder pelletisiert werden können. Die vorliegende Erfindung richtet sich demgegenĂŒber auf Schmierfette.
Schließlich beschreibt die US-Patentschrift 30 76 764 mit Poly(4-methyl-l-pentan) verdickte Schmierfette. Auch diese bekannten Fettmassen besitzen nicht die erwĂŒnschte StabilitĂ€t gegenĂŒber Wasserauswaschcn und gegenĂŒber Hochtemperaturerweichung.
Aufgabe der Erfindung ist somit die Schaffung von Schmierfetten, die ĂŒbliche Verdickungsmittel enthalten und eine verbesserte Wasserauswaschbe.stĂ€ndigkcil, eine verbesserte HochtemperaturerweichungsbestĂ€ndigkeit und eine verbesserte Aussickerungscigcnschaft besitzen.
Zur Lösung dieser Aufgabe wird gemĂ€ĂŸ der Erfindung ein Schmierfett auf der Basis eines SchmicrmitteltrĂ€gers, eines Verdickungsmittels und eines Äthylencopolymeren als Verbesserungsmittel geschaffen, das dadurch gekennzeichnet ist, daß das copolymere Verbesserungsmittel aus einem Terpolymer mit einem Schmelzindex von 0,5 bis 200 besteh t, das
(1) mindestens 65 Gewichtsprozent Äthylen,
(2) mindestens 5 Gewichtsprozent Vinylester von gesÀttigten aliphatischen CarbonsÀuren, mit 1 bis 6 C-Atomen, Alkylacrylate, Alkylmethacrylate, Dialkylmaleate und Dialkylfumarate aliphatischer Alkohole mit 1 bis 6 C-Atomen und
(3) 0,01 bis 3 Gewichtsprozent eines Monomeren aus AcrylsĂ€ure, MethacrylsĂ€ure, ItaconsĂ€ure, MaleinsĂ€ure und FumarsĂ€ure, aus dem Anhydrid der ItaconsĂ€ure, der MaleinsĂ€ure und der FumarsĂ€ure, aus Alkylhydrogen-maleaten und Alkylhydrogenfumaraten, aus Monoacrylaten und Monomethacrylaten von Glykolen, 2-Hydroxy-3-aminopropylĂ€ther, AHylglycerinĂ€ther, Divinylglykr!, 2-DimethylaminoĂ€thylacrylat^-DimethylaminoĂ€thylmethacrylat und N-Vinylpyrrolidon umfaßt.
Die Herstellungen des als Verbesserungsmittel eingesetzten oben erwĂ€hnten Terpolymers sind in der US-Patentschrift 32 15 657 ausfĂŒhrlich beschrieben.
Viele verschiedenartige Verdickungsmittel können fĂŒr die Schmierfette entsprechend der Erfindung eingesetzt werden. Inbegriffen in diese Verdickungsmittel sind Alkali- und Erdalkaliseifen der Fette und FettsĂ€uren mit etwa 12 bis 30 C-Atomen je MolekĂŒl.
Geeignete Metalle sind Natrium, Lithium, Calcium und Barium. Fettsubstanzen stellen dar: StearinsÀure, HydroxysiearinsÀure, Stearin, Baumwollsamenölsiiure, ölsÀure, PalmitinsÀure, MyristinsÀure und gehÀrtete Fischöle (hydrogenated fish oils). 1S
Andere Verdickungsmittel bestehen aus Komplexen von Salzen und Salz-Seifen wie Calciumstearat-acetat (US-Patent 21 97 263); Bariumstearat-acetat (US-Patent 25 64 561); Calciumstearat-caprylat-acetat-Komplexe (US-Patent 29 99 065); Calciumcaprylat-acetat (US-Patent 29 99 066); und Calciumsalze und -seifen von SĂ€uren mit niederem, mit mittlerem und hohem Molekulargewicht und von NuĂŸĂ¶lsĂ€uren; und Aluminiumkomplexe.
Eine andere Gruppe von Verdickungsmittel enthĂ€lt substituierte Harnstoffe, Phthalocyanine, Indanthrene, Pigmente wie Perylimide, Pyromeilitdiimide, DiaminocyanursĂ€ure und Ruß.
Als andere kolloidale Verdickungsmittel werden in den neuen SchmierfettansĂ€tzen im wesentlichen hydro-■phobe Tone verwendet. Solche Verdickungsmittel 1 können aus Tonen hergestellt werden, welche ursprĂŒnglich hydrophilen Charakter haben, jedoch vor dem Einsatz als Komponente eines Schmierfettansatzes durch EinfĂŒhrung von langkettigen Kohlenwasserstoffradikalen in die OberflĂ€che der Partikel des Tones in die hydrophobe Beschaffenheit umgewandelt worden sind. Sie können z. B. einer vorbereitenden Behandlung durch ein organisches kationisches oberflĂ€chenaktives Mittel wie einer Onium-Verbindung unterworfen werden, so Geeignete Onium-Verbindungen sind Tetra-alkyl-ammonium-chloride wie Dimethyldioctadecylammoniumchlorid, Dimethyldibenzylarnmoniumchlorid und Mischungen davon. FĂŒr diese dem Fachmann wohlbekannte Methode der Umwandlung bedarf es wohl keiner J5 weiteren ErlĂ€uterung und sie stellt auch nicht etwa einen Teil der Erfindung dar. Kurz gesagt: die Tone, welche als Ausgangsm.iterial zur Bildung von Verdikkungsmitteln zum Gebrauch in SchmierfetiansĂ€izen gebraucht werden, können natĂŒrlich vorkommende und chemisch unmodifizierte Tone umfassen. Diese Tone sind Silicate von komplexer kristalliner Struktur, deren genaue Zusammensetzung nicht zum Gegenstand einer genauen Beschreibung zu machen ist, da sie von einer natĂŒrlichen Fundstelle zur anderen weitgehend schwanken. Diese Tone können als anorganische komplexe Silicate bezeichnet werden wie Aluminiumsilicat, Magnetsiumsilicat, Bariumsilicat und Ă€hnliche, die zusĂ€tzlich zu ihrem Silicatgitter wechselnde Mengen kationisch austauschbarer Gruppen wie z. B. Natrium enthalten.
Inbegriffen in diese hydrophilen Tone, die fĂŒr die Umwandlung in die gewĂŒnschten Verdickungsmittel besonders geeignet sind, zeigen sich Monimorillonite wie Bentonit, Attapulgit, Hektorit, Illit, Saponit, Sepiolit, Biotit, Vermiculit, Zeolith-Tone und Ă€hnliche.
Bevorzugte Verdickungsmittel sind Calcium-Bleiacetat-Komplext, wie sie in SchmierfettansĂ€tzen gebraucht und im US-Patent 28 98 297 beschrieben sind. Solche Verdickungsmittel umfassen eine Mischung von (A) Erdalkalimetallseifen und deren Salzen, wobei das aus der Gruppe der Erdalkalien ausgewĂ€hlte Metall aus Calcium besteht, und einer Mischung (B) von Calcium und Barium, wobei das chemisch gebundene Äquivalentgewichi von Barii'm nicht mehr als etwa 15% in dieser Mischung aufmacht, gerechnet gegen Calcium bei diesen Seifen und Salzen. Dabei ist die Mischung A dieser Seifen und Salze in der eine Schmierfett bildenden Menge vorhanden. Die Metallsalze der Mischung A sind Salze einer niedermolekularen, unsubstituierten, gesĂ€ttigten MonocarboxylsĂ€ure (1) mit 1 bis 6 C-Atomen je MolekĂŒl. Die Metallseifen der Mischung A sind Seifen verschiedener SĂ€uren mit der SĂ€ure I, wie aus der folgenden Tabelle ersichtlich:
SĂ€ure
Zahl der C-Atome Gewichtsprozent
der Gesamt-SĂ€uren
(I) mit niederem Molekulargewicht
(II) mit mittl. Molekulargewicht
(III) mit hohem Molekulargewicht
(IV) Ölsiiuren
1 bis 6 10 bis 50
7 bis 12 5 bis 50
wenigstens 13 5 bis 40
8 bis 18 25 bis 60
SĂ€ure II ist ausgewĂ€hlt aus unsubstituierten, monohydroxysubstituierten und methylsubstituierten gesĂ€ttigten aliphatischen MonocarbonsĂ€uren. SĂ€ure III ist ausgewĂ€hlt aus unsubstituierten und monohydroxysubstituierten gesĂ€ttigten aliphatischen MonocarbonsĂ€uren und monoungesĂ€ttigten aliphatischen MonocarbonsĂ€uren. Die ölsĂ€uren sind NuĂŸĂ¶lsĂ€uren, weiche Mischungen von SĂ€uren umfassen, die von 8 bis 18 C-Atomen je MolekĂŒl und vorzugsweise C12- bis Cu-SĂ€uren enthalten, außerdem mindestens 0,5 bis zu 5 Gewichtsprozent (ausgedrĂŒckt in PbO) einer Bleiverbindung mit mindestens einer der SĂ€uren I bis IV.
Bei den Schmierfetten der Erfindung können Mineralöle oder auch synthetische Öle mit SchmierviskositĂ€t Anwendung finden. Brauchbare Mineralöle sind solche mit einer ViskositĂ€t (SUS) von mindestens 40 see bei 37,80C(IOO0F) und besonders solche im Bereich von etwa 60 bis etwa 6000 see bei 37,80C.
Synthetische TrĂ€ger anstelle von Mineralöl oder in Verbindung damit sind anwendbar. Geeignete synthetische TrĂ€ger sind: Polypropylen, Polypropylenglykol, Trimethylolpropanester, Neopentyl- und Pentaerythrit-Ester, Di-(2-Ă€thyIhexyl)-sebacat, Di- (2-Ă€thyI-hexyI)-adipat, Dibutylphthalat, PolyĂ€thylenglykol, Di-2-Ă€thyIhexoat, FIuor-Kohlenstoffverbindungen, PerfluoroalkylpolyĂ€ther, Ester der KieselsĂ€ure, Silane, Ester phosphorhaltiger SĂ€uren, flĂŒssige Harnstoffe, Ferrocene-Derivate, gehĂ€rtete Mineralöle Polyphenyle des Kettentyps Siloxane, weiterhin Silicone (Polysiloxane) Fluorsilicone, Alkyl-substituierte DiphenylĂ€ther z. B. Butyl-substituierte Bis-(p-phenoxyphenyl)Ă€ther und PhenoxyphenylĂ€ther.
Andere Kohlenwasserstofföle schließen auch synthetische Kohlenwasserstoffpolymere ein, welche verbesserte ViskositĂ€tsindices aufweisen. Sie werden hergestellt durch Polymerisation eines Olefins oder einer
Mischung von Olefinen mit 5 bis 18 C-Atomen im MulekĂŒl in Gegenwart von aliphatischen Halogeniden und einem Katalysator vom Zieglertyp.
Es ist jedoch klar, duß die dabei "in Betracht gezogenen Mischungen auch andere charakteristische Materialien enthalten können. Es können z. B. Antioxidantien wie Phenyl-ft-naphtylarrin (PAN), Korrosionsinhibitoren, Mittel fĂŒr e-<trem hohe Drucke, ViskositĂ€isindexmittel, und FĂŒllstoffe Verwendung finden. Unter diesen Materialien befinden sich kolloidale KieselsĂ€ure. Calciumaceta!, CalciumcarUonat und MolybdĂ€ndisulfid. Derartige charakteristische Materialien beeintrĂ€chtigen nicht den Schn;ierwert der Zusammensetzung der Erfindung noch beeintrĂ€chtigen sie ĂŒb nĂŒtzlichen Eigenschaften der Terpolymere; vieimeh;· sind diese charakteristischen Maierialien dazu dienlich, den einzelnen Zusammensetzungen, in die sie einverleibt werden, ihre ĂŒblichen Eigenschaften zu verleihen.
Die Schmierfette der Erfindung können in Übereinstimmung mit den herkömmlichen Fertifungsnietboden wie jede beliebige Mischmerhode, wodurch feste Partikel mit einer FlĂŒssigkeit benetzt werden, hergestellt werden. Geeignete Einrichtungen fĂŒr diesen Zweck stellen KolloidmĂŒhlen, 3-Walzßni'arbmĂŒhlen und die Manton-GauĂŒn Homogenisiermaschine und Ă€hnliche dar.
In bezug auf das TerpolymerverbesserungsmitteĂ€ der Erfindung enthalten bevorzugte Terpolymere 20 bis 30 Gewichtsprozent der vorerwĂ€hnten Komponente der 'Gruppe 2 und zwar der zweiten Ă€thylenisch ungesĂ€ttigten monomeren Komponente; und 0,1 bis 1 Gewichtsprozent der vorerwĂ€hnten Komponente, der Gruppe 3 und zwar der dritten Ă€thylenisch ungesĂ€ttigten monomeren Komponente. Maßgebende bevorzugte Terpolymere enthalten außer Äthylen 20 bis 30 Gewichtsprozent Vinylacetat und 0,1 bis 1 Gewichtsprozent AcrylsĂ€ure; 20 bis 30 Gewichtsprozent Vinylacetat und .0,1 bis 1 Gewichtsprozent MethacrylsĂ€ure, 20 bis 30 ^Gewichtsprozent Äthylacrylat und 0,1 bis 1 Gewichtsprozent AcrylsĂ€ure; 20 bis ?0 Gewichtsprozent Äthylacrylat und 0,1 bis 1 Gewichtsprozent MethacrylsĂ€ure; 20 bis 30 Gewichtsprozent Methylmethacrylat und 0,1 bis 1 Gewichtsprozent AcrylsĂ€ure; und 20 bis 30 !Gewichtsprozent Methylrnethacryiat und 0,1 bis 1 Gewichtsprozent MethacrylsĂ€ure (wobei die Zahlenangaben nur NĂ€herungswerte sind).
Was die Menge der TerpoJyraerverbesserungsmittel betrifft, wird letzteres, wie vors'ehend beschrieben, in geringer Menge verwendet, welche ausreicht, dem Schmierfettansatz die gewĂŒnschte WiderstandsfĂ€hig-
IU
20 keil gegen das Auswaschen durch Wasser und dun Widerstand gegen das Erweichen bei holicn Temperaluren zu verleihen. Besonders bevorzugt sind Schnverfei te, in welchen das Terpolymer in einer Höhe vun mindestens etwa 0,01 Gewichtsprozent vorhanden ist. FĂŒr die meisten Zwecke erbringt die Anwendung dts Terpolymers in einer Höhe von etwa 0,1 bis etwa 5 Gewichtsprozent eine höchst zufriedenstellende Verbesserung der Schmierfellzusammensetzungen.
Um die Verbesserung des Widerstandes gegen das Auswaschen durch Wasser und des Widerstandes gegen Erweichen bei erhöhter Temperatur nachzuweisen, wenn das oben beschriebene Terpolymer angewendet wird, wurde ein geeignetes Schmierfett mit komplexen Calcium-Blei-Verbindungcn hergestellt. Es enthielt in Gewichtsteilen ausgedrĂŒckt 16% Verdickungsmittel. 80% TrĂ€ger und 4% Additive.
Das Verdickungsmittel wurde gebildet durch Reaktion eines geringen stöchiometrischen Überschusses von Metallbase, bestehend aus 4,5 Teilen Kalk zu 1 Teil BleiglĂ€tte mit FettsĂ€uren, bestehend aus 4,5 Teilen Kalk zu 1 Teil BleiglĂ€tte mit FettsĂ€uren, bestehend aus 27,5 Gewir^'sprozent einer niedermolekularen SĂ€ure, nĂ€mlich EssigsĂ€ure, 58 Gewichtsprozent einer SĂ€ure von mittlerem Molekulargewicht, nĂ€mlich CaprylsĂ€ure, und 14,5 Gewichtsprozent SĂ€uren mit hohem Molekulargewicht, KokusfettsĂ€urenJCubisCiB). Der TrĂ€ger bestand aus einem naphthenischen, durch Lösungsmittel gereinigten Mineralöl, mit einer ViskositĂ€t von 800 SUS bei 37,8°C bzw. 70 SUS bei 1000C. Die Additive enthielten 2 Gewichtsprozent eines chlorierten Wachses als Hochdruckmitte!, 0,8 Gewichtsprozent eines Antioxidanten, nĂ€rr.lich blockiertes Phenol und aromatisches Amin, und 1,2 Gewichtsprozent eines Korrosionsinhibitors.
Wie in den Beispielen der folgenden Tabelle I gezeigt ist, wurden unterschiedliche Mengen eines typischen Terpolymers, wie es die Erfindung darstellt, in die oben hergestellten Schmierfette zur Auswertung gebracht. Dieses Terpolymer stellt ein Äthylen-Vinylacetat-MethacrylsĂ€ure-Terpolymer dar, hat einen Schmelzindex von 13 und enthĂ€lt 27,5 Gewichtsprozent Vinylacetat, 0,7 Gewichtsprozent MethacrylsĂ€ure und 71,8 Gewichtsprozent Äthylen.
Die betreffenden SchmierfettansĂ€tze, die die genannten Mengen des oben hergestellten Terpolymers gewichtsmĂ€ĂŸig erhalten, wurden dem Standard-Wasserauswaschtest unterzogen (ASTM D 1264) unter Anwendung eines breiteren ringförmigen Schildes, um den Durchschnitt des Wassers in das mit Schmierfett
5» bestrichene Lauflager zu erleichtern.
31)
35
Tabelle I
Einfluß von Terpolymer auf den Widerstand gegen Auswaschen
Beispiel Schmierfett
Konsistenz
ASTM D 217
(UW/60W)*)
Wasserauswascritesl
ASTM D 1264
(% Auswaschung)**)
1 Ausgangs-Schmierfett 312/328 25
2 Ausgangs-Schmierfett + 0,3% Terpolymer 298/318 13
3 Ausgangs-Schmierfett + 0,5% Terpolymer 272/272 7
4 Ausgangs-Schmierfett + 1,0% Terpolymer 218/255 4
*) UW/60W = Unbearbeitet/mit 60 Schlagen bearbeitet.
**) Unter Anwendung eines breiteren ringförmigen Schilds.
Aus den Beispielen der vorhergehenden Tabelle I wird offenbar, daß die Terpolymere der Erfindung eine starke Wirksamkeit besitzen, um den SchmierfettansĂ€tzen gegen das Auswaschen durch Wasser Widerstandskraft zu verleihen.
Wie anhand der Beispiele der folgenden Tabelle II
gezeigt ist, wurden unterschiedliche Mengen des oben beschriebenen, reprÀsentativen Terpolymers in das oben beschriebene Schmierfett zur Auswertung im Hinblick auf den Widerstand gegen Erweichungswirkung bei erhöhten Temperaturen eingearbeitet.
Tabelle II
Einfluß des Terpolymers auf die Erweichungswirkung
Beispiel Stoff
Konsistenz ASTM D (UW/60W) Erweichungswirkung %
(Grade in Celsius)
65,6° 93,3° 121,1°
160°
Radlagerschwundtest ASTM D 126
(126,7°C 130 g)
modifiziert
Schwund in g
1 Ausgangs-Schmierfett 301/318 21
2 Ausgangs-Schmierfett + 0,3% 256/286 13 Terpolymer
ĂŒber 50**) ĂŒber 50**) 12,1
33 . 40 4,6
*) UW/60W = Unbearbeitet/mit 60 Schlagen bearbeitet. **) Zu weich, als daß die Penetration hatte gemessen werden können.
Aus den Beispielen der vorgehenden Tabelle II geht hervor, daß die Terpolymere der Erfindung eine starke Wirksamkeit besitzen, um den Schmierfetten Widerstafidskraft gegen das Erweichen bei erhöhten Temperaturen zu verleihen.
230217/82

Claims (1)

15 PatentansprĂŒche:
1. Schmierfett auf der Basis eines SchmiermitteltrĂ€gers, eines Verdickungsmittel und eines Äthylen- r> copolymeren als Verbesserungsmittel, dadurch gekennzeichnet, daß das Copolymer-Verbesserungsmittel aus einem Terpolymer mit einem Schmelzindex von 0,5 bis 200 besteht, das
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FR2205570B1 (de) * 1972-11-07 1976-06-04 Mobil Oil France
US3997455A (en) * 1974-07-01 1976-12-14 Mobil Oil Corporation Paraffinic base greases
US3904534A (en) * 1974-07-01 1975-09-09 Mobil Oil Corp Grease manufacture
DE3136931A1 (de) * 1981-09-17 1983-04-07 Akzo Gmbh, 5600 Wuppertal Copolymere aus (alpha)-(beta)-ungesaettigten dicarbonsaeureestern, verfahren zu deren herstellung sowie deren verwendung als gleitmittel fuer die kunststoffverarbeitung
JPS59150579U (ja) * 1983-03-23 1984-10-08 ć€§é‡‘èˆˆæ„­æ ȘćŒäŒšç€Ÿ æ”„ćŒ–æ§œæ”ć‡șæ°Žăźè’žç™șæ•Łć‡Šç†èŁ…çœź
CA1290137C (en) * 1984-06-11 1991-10-08 John L. Burba, Iii Intercalations of crystalline lithium aluminates
US4606183A (en) * 1984-11-20 1986-08-19 Amsted Industries Incorporated Lubricated and thermoplastic impregnated wire rope
GB8503382D0 (en) * 1985-02-09 1985-03-13 British Petroleum Co Plc Lubricating grease
US5116522A (en) * 1988-09-08 1992-05-26 Exxon Research And Engineering Company Grease composition containing an ethylene copolymer having a melt index of at least about 40
CA1334965C (en) * 1988-09-08 1995-03-28 Terrance O. Brown Lubricating composition
DE10343901A1 (de) * 2003-09-19 2005-04-14 Basf Ag Amidgruppenhaltige Ethylenterpolymere und ihre Verwendung
US20050209114A1 (en) * 2004-03-19 2005-09-22 The Lubrizol Corporation, A Corporation Of The State Of Ohio Functionalized polymer composition for grease
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US2698299A (en) * 1951-11-27 1954-12-28 Socony Vacuum Oil Co Inc Modified acidic copolymer-fatty acid soap greases
FR1226563A (fr) * 1959-02-20 1960-07-13 Exxon Standard Sa Graisses améliorées
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