DE1113785B - Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen OElen - Google Patents

Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen OElen

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Publication number
DE1113785B
DE1113785B DEU4409A DEU0004409A DE1113785B DE 1113785 B DE1113785 B DE 1113785B DE U4409 A DEU4409 A DE U4409A DE U0004409 A DEU0004409 A DE U0004409A DE 1113785 B DE1113785 B DE 1113785B
Authority
DE
Germany
Prior art keywords
grease
lubricating grease
mineral
animal
synthetic oils
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.)
Pending
Application number
DEU4409A
Other languages
English (en)
Inventor
Ted Symon
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.)
Universal Oil Products Co
Original Assignee
Universal Oil Products Co
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 Universal Oil Products Co filed Critical Universal Oil Products Co
Publication of DE1113785B publication Critical patent/DE1113785B/de
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G01R17/10AC or DC measuring bridges
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00Preparation of carboxylic acid esters
    • C07C67/48Separation; Purification; Stabilisation; Use of additives
    • C07C67/62Use of additives, e.g. for stabilisation
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    • C10M5/00Solid or semi-solid compositions containing as the essential lubricating ingredient mineral lubricating oils or fatty oils and their use
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    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11BPRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
    • C11B5/00Preserving by using additives, e.g. anti-oxidants
    • C11B5/0042Preserving by using additives, e.g. anti-oxidants containing nitrogen
    • C11B5/005Amines or imines
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00Measuring arrangements involving comparison with a reference value, e.g. bridge
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    • C10M2201/041Carbon; Graphite; Carbon black
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Description

DEUTSCHES
PATENTAMT
U4409IVc/23c
ANMELDETAG: 7. MARZ 1957
BEKANNTMACHUNG
DER ANMELDUNG
UNDAUSGABE DER
AUSLEGESCHRIFT: 14. SEPTEMBER 1961
Die Erfindung hat ein Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen ölen zum Gegenstand, das einen besonderen Verhinderer zur Verzögerung oxydativen Verderbens enthält.
Synthetische Schmierfette werden im allgemeinen als solche auf Lithiumbasis, Natriumbasis, Calciumbasis, Bariumbasis, Strontiumbasis, Aluminiumbasis, u. dgl. bezeichnet. Diese Schmierfette sind feste oder halbfeste Gele und werden im allgemeinen hergestellt, indem man Mineralöle oder synthetische Öle mit in Kohlenwasserstoff löslichen Metallseifen oder Salzen höherer Fettsäuren, z. B. Lithiumstearat, Calciumstearat oder Aluminiumnaphthenat, vermengt. Das Schmierfett kann Verdickungsmittel, ζ. Β. Kieselsäure, Ruß, Polyakrylate oder Talk, enthalten. Eine andere Schmierfettart wird aus oxydiertem Petrolwachs durch Vermengen und Verarbeiten mit der verseifbaren Grundlage und der geeigneten Menge des gewünschten Verseifungsmittels zubereitet. Andere Schmierfettarten sind Petrolfett, Walfett, Wollfett und Fette, die aus nicht eßbaren Fetten, Talg, Schlächtereiabfall und ähnlichen Rohstoffen hergestellt sind. Zu den künstlichen Schmierfetten gehören auch aliphatische Ester, Polyalkylenoxyde (Polymere von Olefinoxyden) und hochfluorsubstituierte Kohlenwasserstoffe. Von den aliphatischen Estern wird Di-(2-äthylhexyl)-sebacinat in verhältnismäßig großem Maßstab verwendet. Andere Beispiele aliphatischer Ester sind Dialkylazelate, Dialkylsuberate, Dialkylpimelate, Dialkyladipate und Dialkylglutarate. Beispiele der Polyalkylenoxyde und ihrer Derivate sind Polyisopropylenoxyddiester. Beispiele der Silicone sind Methylsilicon und Methylphenylsilicon, und ein Beispiel der Silikate ist Tetraisooktylsilikat. Kennzeichnende Beispiele der hochfluorierten Kohlenwasserstoffe sind fluoriertes öl und Perfluorkohlenwasserstoffe.
Gegenstand der Erfindung ist ein Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen ölen, das einen Gehalt an einem gegebenenfalls am Stickstoffatom alkylsubstituierten 2,4'-Diaminodiphenyläther oder 2,4'-Diaminodiphenylsulfid aufweist. Vorzugsweise hat der Alkylsubstituent 1 bis 20 Kohlenstoffatome.
Als Zusätze zu Schmiermitteln sind gegebenenfalls durch Alkyl-, Oxalkyl- oder Cyclohexylgruppen kernsubstituierte Benzidinverbindungen bekannt, deren Aminogruppen durch je mindestens einen Cyclohexylrest substituiert sind. Vergleichsversuche, über die im Beispiel 4 berichtet wird, zeigen jedoch, daß diese Benzidinverbindungen eine beträchtlich kleinere Haltbarkeitsverlängerung liefern als die Zusätze gemäß der Erfindung.
Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen Ölen
Anmelder:
Universal Oil Products Company,
organisiert 1958,
Des Piaines, 111. (V. St. A.)
Vertreter: Dr. H. H. Willrath, Patentanwalt,
Wiesbaden, Hildastr. 32
Beanspruchte Priorität:
V. St. v. Amerika vom 9. März 1956
Ted Symon, Elmhurst, 111. (V. St. Α.),
ist als Erfinder genannt worden
Als Oxydationsverhinderer für Krackbenzin sind außerdem Di-tert-alkylphenyldiamine, insbesondere N,N'-Di-tert-butyl-p-phenylendiamin beschrieben worden. Es kann jedoch von einer Haltbarkeitssteigerung bei Benzinen nicht unmittelbar auf eine Verhinderung der oxydativen Zersetzung von Schmierfetten geschlossen werden.
Gemäß einer bevorzugten erfindungsgemäßen Ausführungsform besitzt ein Schmierfett gemäß der Erfindung einen Gehalt von 0,1 bis 5 Gewichtsprozent, bezogen auf die Gesamtschmierfettmenge, an den gegebenenfalls am N-Atom alkylsubstituierten 2,4'-Diaminodiphenyläthern oder Diaminodiphenylsulfiden. Bevorzugt haben hierbei die Alkylgruppen sekundäre Konfiguration, d. h., die Alkylgruppe ist an das Stickstoffatom mit einem mittelständigen Kohlenstoffatom der Alkylgruppe angelagert. Hierzu gehören 2,4'-Diisopropylaminodiphenyläther und die entsprechenden 2,4'-Di-sec-alkylaminodiphenyläther sowie 2,4'-Dialkylaminodiphenylsulfide, wie 2,4'-Diisopropylaminodiphenylsulfid und die entsprechenden 2,4'-Di-secalkylaminodiphenylsulfide, bei welchen die Alkylgruppe jeweils 4 bis 20 C-Atome aufweist.
Obgleich Verbindungen mit sekundären Alkylgruppen bevorzugt werden, ist zu beachten, daß geeignete Verbindungen mit n-Alkylsubstituenten verwendet werden können, jedoch nicht unbedingt mit ge-
109 688/195
nau denselben Ergebnissen. Zur Erläuterung für diese Verbindungsklasse seien 2,4'-Dimethylaminodiphenyläther, 2,4'-Diäthylaminodiphenyläther und die 2,4'-Din-alkylaminodiphenyläther mit 3 bis 12 Kohlenstoffatomen in der geraden Alkylgruppenkette genannt.
Im allgemeinen soll vorzugsweise der 2,4'-Dialkylaminodiphenyläther und das 2,4'-Dialkylaminodiphenylsulfid eine symmetrische Verbindung sein, d. h., die Alkylgruppen haben dieselbe Konfiguration und Kettenlänge. In einigen Fällen können jedoch die Alkylgruppen entweder hinsichtlich der Zahl der Kohlenstoffatome oder hinsichtlich ihrer Konfiguration bzw. auch in beiden Hinsichten verschieden sein, vorzugsweise werden sie aus den vorstehenden genauer aufgeführten Alkylgruppen ausgewählt.
Es sei bemerkt, daß auch ein Gemisch der erfindungsgemäßen Zusätze verwendet werden kann, wobei die jeweiligen Verbindungen vorzugsweise aus denjenigen ausgewählt werden, die vorstehend im einzelnen genannt wurden. In einigen Fällen wird während der Herstellung des Zusatzes ein Isomerengemisch erzeugt, und gewünschtenfalls wird das Gemisch als solches benutzt, wodurch man zusätzlichen Aufwand an Zeit und Kosten für die Trennung der Mischungsbestandteile vermeidet.
Im allgemeinen wird der Zusatz in einer Konzentration im Bereich von 0,0001 bis 5 Gewichtsprozent, bezogen auf das Gesamtschmierfett, verwendet. Die zu benutzende genaue Konzentration wird von der jeweils zu behandelnden organischen Substanz abhängen. In den meisten Fällen wird man Konzentrationen von etwa 0,01 bis etwa 3 Gewichtsprozent verwenden.
Der erfindungsgemäße Zusatz kann zusammen mit anderen bekannten Zusatzstoffen verwendet werden, beispielsweise Verhinderer zusammen mit höheren Alkoholen, Estern, organischen Aminen, Polybuten, geschwefelten fetten Stoffen, Schwefelchlorverbindungen, Farbstoffen, Geruchstoffen oder Füllstoffen. In einigen Fällen kann es vorteilhaft sein, auch einen Metalldesaktivator, z. B. Disalicylaldiaminopropan oder Äthylendiamintetraessigsäuretetranatriumsalz, bzw. andere Zusatzstoffe wie Trikresylphosphat, Trialkylphenole einschließlich 2,6-Di-tert-butyl-4-methylphenol, 2,4-Di-methyl-6-tert-butylphenol, alkylierte Diphenylamine, Phenylnapthylamine, Dialkylphenylendiamine, Phenothiazin, organische Selenverbindungen sowie Korrosionsverhinderer, Hochdruckzusätze oder Viskositätsindexverbesserer hinzufügen.
Der erfindungsgemäße Zusatz kann in das Schmierfett als organischer Stoff in irgendeiner geeigneten Weise und während irgendeiner geeigneten Herstellungsstufe eingebracht werden.
10
Beispiel 1
2,4'-Diaminodiphenyläther wurde als Verhinderer in einem Lithiumfett benutzt. Das Schmierfett wurde zubereitet, indem man 91 % emes pennsylvanischen Brightstock mit 8°/o Lithiumstearat vermischte. Das Gemisch wurde auf etwa 230°C unter gleichzeitigem Rühren erhitzt. Anschließend wurde das Fett unter Rühren auf 16O0C abgekühlt, und bei dieser Temperatur wurde 1% 2,4'-Diaminodiphenyläther zugesetzt. Das Rühren wurde fortgesetzt, und die Mischung wurde auf etwa 1210C abkühlen gelassen, worauf das Schmierfett langsam weiter auf Zimmertemperatur abkühlte.
Die Beständigkeit des Schmierfettes wurde gemäß der modifizierten Norma-Hoffman-Methode (ASTM D 942-50) geprüft, bei der eine Probe des Schmierfettes in eine Bombe in Gegenwart von Messingscheiben gebracht wurde, die als Oxydationskatalysator wirkten. In die Bombe wurde Sauerstoff eingeführt. Dann wurde sie auf 100°C erhitzt, und die zur Erreichung eines Druckabfalles von 0,34 Atm erforderliehe Zeit wurde als Induktionsperiode angenommen. Bei diesem Versuch hatte eine Kontrollprobe des Schmierfettes (ohne diesen Zusatzstoff) eine Induktionsperiode von 10,5 Stunden. Andererseits hatte eine Probe des Schmierfettes mit 1 Gewichtsprozent 2,4'-Diaminodiphenyläther eine Induktionsperiode von 260 Stunden. Im Gegensatz hierzu hatte eine Probe desselben Schmierfettes, die mit 1 Gewichtsprozent 4,4'-Diaminodiphenyläther stabilisiert war, eine Induktionsperiode von nur 106 Stunden. Es ist also zu bemerken, daß der gemäß der Erfindung benutzte Verhinderer überraschend und außergewöhnlich wirksam hinsichtlich der Verbesserung der Stabilität des Schmierfettes war.
Die Herstellung der in der nachfolgenden Tabelle angegebenen Schmierfette erfolgte gemäß Beispiel 1.
Beispiel Ölbasis »/ο - Verdicker V. Zusatz, °/o
*)
Induktionszeit
Stunden
* ί
3 {
Midcontinent SAE 30
Di-2-äthylhexylsebacat
1 92
J 91
1 88
J 87
Li-Stearat
Li-Stearat
Li-Stearat
Li-Stearat
8
8
12
12
1
1
10,5
370
17
318 Druck
abfall 0,068 Atm.
*) 2,4'-Diaminodiphenyläther
Beispiel 4
Das in diesem Beispiel benutzte Schmierfett wurde im wesentlichen, wie in den Beispielen 1 und 2 beschrieben, zubereitet, jedoch wurde ein Mittelkontinent-Schmieröl mit einer SAE-Viskosität 20 mit 8 Gewichtsprozent Lithiumstearat vermischt.
Eine Kontrollprobe dieses Schmierfettes, d. h. eine Probe, die keinen Verhinderer enthielt, hatte eine Induktionsperiode von 8 Stunden nach dem bei 121° C unter einem Anfangssauerstoffdruck von 8,5 Atm.
durchgeführten Norma - Hoffman - Haltbarkeitstest. Gemäß der folgenden Tabelle hatten Proben dieses Schmierfettes mit 0,1 bzw. 0,3 Gewichtsprozent 2,4'-Diaminodiphenyläther und 2,4'-Diaminodiphenylsulfid eine beträchtlich längere Haltbarkeitsdauer, als sie bei Vergleichsversuchen an anderen Proben desselben Ausgangsschmierfettes, jedoch in ähnlicher Weise mit 0,1 bzw. 0,3 Gewichtsprozent eines der bekannten Zusatzstoffe, N3N'-Dicyclohexyl-3,3'-dimethoxybenzidin und N,N'-Dicyclohexyl-3,3'-dimethylbenzidin, vermischt beobachtet wurden.
5 6
Tabelle Haltbarkeitsdauer nach Norma-Hoffman-Sauerstoffhaltbarkeitstest
Haltbarkeit in Stunden 0,3 Gewichtsprozent
Zusatzstoff bei dem Schmierfett mit Zusatzstoff 121
0,1 Gewichtsprozent 85
2,4'-Diaminodiphenyläther 68 89
2-Amino-4'-sec.-butylaminodiphenyläther 35 95
2-sec.-Butylamino-4'-Aminodiphenyläther 39 105
2-Amino-4'-Diisopropylaminodiphenyläther 68 15
2,4'-Diaminodiphenylsulfid 65 14
HN'-Dicyclohexyl-S^'-dimethoxybenzidin 27
N,N'-Dicyclohexyl-3,3'-dimethylbenzidin 20

Claims (3)

PATENTANSPRÜCHE:
1. Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen ölen, gekennzeichnet durch einen Gehalt an einem gegebenenfalls am Stickstoffatom alkylsubstituierten 2,4'-Diaminodiphenyläther oder 2,4'-Diaminodiphenylsulfid.
2. Schmierfett nach Anspruch 1, dadurch gekennzeichnet, daß der Alkylsubstituent 1 bis 20 Kohlenstoffatome enthält.
3. Schmierfett nach Anspruch 1 und 2, gekennzeichnet durch einen Gehalt von 0,1 bis 5 Gewichtsprozent, bezogen auf das Gesamtschmierfett, des Diaminodiphenyläthers oder Diaminodiphenylsulfids.
In Betracht gezogene Druckschriften:
Deutsche Patentschrift Nr. 929 385;
USA.-Patentschrift Nr. 2 692 288.
© 109 688/195 9.61
DEU4409A 1956-03-09 1957-03-07 Schmierfett auf der Basis von mineralischen, tierischen oder synthetischen OElen Pending DE1113785B (de)

Applications Claiming Priority (1)

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US570420A US2910437A (en) 1956-03-09 1956-03-09 Stabilization of lubricants

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US (1) US2910437A (de)
DE (1) DE1113785B (de)
ES (1) ES234133A1 (de)
FR (1) FR1172914A (de)
GB (1) GB819024A (de)
NL (1) NL102710C (de)

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Publication number Priority date Publication date Assignee Title
US2982729A (en) * 1958-04-02 1961-05-02 Universal Oil Prod Co High temperature lubricating grease containing a p, p'-diaminodiphenylether
US3169926A (en) * 1961-11-29 1965-02-16 Universal Oil Prod Co Stabilization of organic substances
US3208944A (en) * 1962-11-19 1965-09-28 Universal Oil Prod Co Stabilization of lubricants
US3240706A (en) * 1963-01-24 1966-03-15 Universal Oil Prod Co Stabilization of organic substances
DE1248936B (de) * 1966-03-16 1967-08-31
US4380497A (en) * 1981-05-12 1983-04-19 Uop Inc. Amines of alkoxydiphenyl esthers as antioxidants and lubricating oils and greases containing same
US4386002A (en) * 1981-05-12 1983-05-31 Uop Inc. Imines of aminodiphenyl esthers as antioxidants and lubricating oils and greases containing same
US4378298A (en) * 1981-05-12 1983-03-29 Uop Inc. Imines of 2,4-diaminodiphenyl ethers as antioxidants for lubricating oils and greases
CN114892176B (zh) * 2022-05-12 2024-03-26 中山大学 有机硒在抑制碳钢在酸性溶液中腐蚀的应用和碳钢缓蚀剂

Citations (2)

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Publication number Priority date Publication date Assignee Title
US2692288A (en) * 1951-03-29 1954-10-19 Eastman Kodak Co Production of n-tertiary alkylated aromatic secondary diamines
DE929385C (de) * 1952-04-23 1955-06-27 Bayer Ag Zusaetze fuer Schmiermittel

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US2048362A (en) * 1934-05-04 1936-07-21 Dow Chemical Co Acid composition for treatment of deep wells
US2269265A (en) * 1939-12-14 1942-01-06 Socony Vacuum Oil Co Inc Stabilized refined petroleum product
US2290860A (en) * 1940-04-26 1942-07-28 Standard Oil Co Beneficiation of lubricating oils
US2367264A (en) * 1940-09-30 1945-01-16 Standard Oil Co Beneficiating lubricants, etc.
US2350746A (en) * 1941-11-26 1944-06-06 Socony Vacuum Oil Co Inc Mineral oil composition
US2440530A (en) * 1944-11-04 1948-04-27 Shell Dev Stabilized organic compositions
US2523100A (en) * 1947-05-17 1950-09-19 Standard Oil Dev Co Mineral oil composition and additive therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2692288A (en) * 1951-03-29 1954-10-19 Eastman Kodak Co Production of n-tertiary alkylated aromatic secondary diamines
DE929385C (de) * 1952-04-23 1955-06-27 Bayer Ag Zusaetze fuer Schmiermittel

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FR1172914A (fr) 1959-02-17
GB819024A (en) 1959-08-26
US2910437A (en) 1959-10-27
NL102710C (de)
ES234133A1 (es) 1957-08-16

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