DE926680C - Zusaetze fuer Schmiermittel - Google Patents

Zusaetze fuer Schmiermittel

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Publication number
DE926680C
DE926680C DEC6491A DEC0006491A DE926680C DE 926680 C DE926680 C DE 926680C DE C6491 A DEC6491 A DE C6491A DE C0006491 A DEC0006491 A DE C0006491A DE 926680 C DE926680 C DE 926680C
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Prior art keywords
lubricants
additives
oil
low molecular
molecular weight
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Wilhelm Dr Dietrich
Hans-Joachim Dr Mertens
Fritz Dr Wetter
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Huels AG
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Chemische Werke Huels AG
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  • Chemical & Material Sciences (AREA)
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Description

AUSGEGEBEN AM 21. APRIL 1955
C 6491 IVd j23 c
Zusatz zum Patent 925
Gegenstand des Patent's 925 192 ist die Verwendung von organischen Nitroverbindungen und, öllöslichen Di- bzw. Polysulfiden von Xanthogenate! als Zusätze zu Schmiermitteln auf Mineralölbasis'. Es ist auch bereits bekannt, Polysulfide von Olefinen als Hochdr uckschmier mi ttelzusätze für Mineralöle zu verwenden.
Es wurde gefunden, daß auch die Verwendung von organischen Nitroverbindungen und, an, Stelle öllöslicher Di- bzw. Polysulfide von Xanthogenaten, öllöslichen oder durch Lösungsvermittler in Lösung zu bringenden geschwefelten niedrigmolekularen Olefinen, die durch aromatische Reste substituiert sind, als Zusätze zu Schmiermitteln auf der Basis von natürlichem und synthetischen Mineralölen und -fetten eine ganz wesentliche Verbesserung ihrer Hochdruckschmierfähigkeit bewirkt.
Geeignete organische Nitroverbindungen sind im Patent 925 192 beschrieben.
Die geschwefelten niedrigmolekularen. Olefine, die durch aromatische Reste substituiert sand., besitzen die allgemeine Formel
Rl V^Im t/ —— C ['-'Im R2 >
(S)n
wenn sie sich von Monoolefinen, oder
■f? . /p\ ρ ρ /p\ ρ ρ /p\ τ>
■"■1 VWm *-" ^' " V-'/m ^ ^ V-Ίπι Λ2 j
(S), (S)n
wenn sie sich von Diolefinen ableiten. In diesen Formeln bedeutet R1 einen Aryl- oder Aralkylrest, R2 Wasserstoff, einem Aryl-, Aralkyl- oder hetero-
cyclischen Rest, m eine Zahl von ο bis 2 und η eine Zahl von 1 oder 2. Typische Vertreter sind Styrol, Stilben, Monophenylbutadien, Diphenylbutadien, Mononaphthylbutadien, Dinaphthylbutadien usw., 5 ohne daß in dieser Aufzählung eine Beschränkung liegen soll. Die Herstellung der geschwefelten Olefine ist z.B. aus Beilstein, 4. Auflage (1922), Bd. 5, S. 475/476, bekannt.
Geeignete Lösungs Vermittler sind z. B. 2-Äthylhexanol, 2-Äthyl-i, 3-hexanidioil, 2-Methyl-pentandiol-i, 4, Diäthylenglykolmonoäthyläther, Diäthylenglykolmonobutyläther.
Die im einzelnen anzuwendenden Mengen an Nitroverbindungen und geschwefelten substituierten niedrigmofekularen Olefinen und die jeweils zu verwendenden Verbindungen richten sich nach dem Verwendungszweck. Im. allgemeinen beträgt der Anteil der Nitroverbindungen nur einen Bruchteil der verwendeten geschwefelten substituierten niedrigmolekularen Olefine (bis zu 10 Gewichtsprozent derselben,), von denen, je nach der geforderten Hoehdrackschmierfähigkeit, im allgemeinen. Mengen zwischen etwa 0,5 undi 10 Gewichtsprozent, bezogen auf das reine Schmiermittel, in Betracht kommen,.
Die neuen, Nitroverbindungen, und geschwefelte substituierte niedrigmolekulare Olefine enthaltenden Schmiermittel zeigen gegenüber Metallen! bei normalen Temperaturen keine, bei erhöhten Tetnperaturen und längeren Einwirkungszeiten nur geringfügige, praktisch nicht ins Gewicht fallende Korrosionserscheinungen. Den durch die erwähnten Zusätze verbesserten Schmiermitteln können noch andere Mittel zur Verbesserung der Hochdruckschmierfähigkeit sowie Viskosität^verbesserer, Stoickpunktserniiedriger, Schaumverhinderer und. gegebenenfalls Antioxydationsmittel zugesetzt werden,
Überprüft man die Hochdruckschmiierfähigkeit auf dem allgemein! gebräuchlichen Vierkugelapparat (VKA) nach der in, »Öl und Kohle«, 1944, S. 19 bis 23 beschriebenen Methode, so sind bei Zusatz^ von, beispielsweise 0,1 bis 0,25 Gewichtsprozent organischer Nitroverbindungen zusammen mit ι bis 2,5 Gewichtsprozent an geschwefelten substituierten niedrigmolekularen Olefinen Belastungen von 400 bis über 1000 leg möglich, bevor ein Verschweißen der Kugeln eintritt. Diese Verbesserung der Hoichdruckschmierfahigkeit geht über die Summeniwirkung der einzelnen Komponenten weit hinaus.
Es ist bereits vorgeschlagen worden, Schwefel enthaltende Verbindungen, z. B. geschwefelte Mineralöle, Arylmerkaptane, Alkylsulfide usw., zusammen mit Nitroverbindungen als Zusätze für Schmiermittel auf Mineralölbasis zu verwenden. Die mit den bekannten Zusätzen, wie z. B. 1 Teil Diilauryldisulfid im Gemisch mit 2/3 Teilen a-Nitronaphthaiin, hergestellten Schmiermittel ergeben, bei der Prüfung auf dem Vierkugel apparat jedoch höchstens VKA-Zahlen, von. 200 bis 250. Demgegenüber war nicht vorauszusehen, daß Zusätze, die als Schwefelverbindungen die bislang noch nicht für diesen Zweck verwendeten öllöslichen oder durch LösungsVermittler in Lösung zu bringenden geschwefelten niedrigmolekularen Olefine, die durch aromatische Reste substituiert sind, enthalten, derartig überlegene VKA-Zahlen ergeben.
Beispiel·
Setzt man einem Getriebeöl mit einer VKA-Zahl unter 180 (Dichte d\s — 0,9320, Viskosität bei 200 = 2260E, bei 500 = 22,50E, Viskositätsindex =13, Stockpunkt—130) 5 Gewichtsprozent geschwefeltes Styrol, hergestellt durch Umsetzen von Styrol mit Schwefel bei erhöhter Temperatur (Schwefelwert 23,5 °/o) zu, so erreicht man eine VKA-Zahl von 480, Durch Zugabe von 0,25 Gewichtsprozent 2, 4-D1-nitrophenol zu der Mischung steigt die VKA-Zahl auf 650. Der Zusatz von Dinitrophenol allein, zum Getriebeöl bewirkt keine Erhöhung der VKA-Zahl.

Claims (1)

  1. Patentanspruch:
    Weitere Ausbildung des Gegenstandes des Patents 925 192, gekennzeichnet durch die Verwendung von öllöslichen oder durch Lösungsvermittler in Lösung zu bringenden geschwefelten niedrigmolekularen, Olefinen, die durch aro^ matische Reste substituiert sind, neben organischen Nitroverbindungen als Zusätze für Schmiermittel.
    Angezogene Druckschriften,: USA.-Patentschrift Nr. 2 574994; französische Patentschriften Nr. 953 948,960 793; britische Patentschriften Nr. 669206, 455305.
    1 9617 4.
DEC6491A 1952-08-25 1952-10-04 Zusaetze fuer Schmiermittel Expired DE926680C (de)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016875B (de) * 1956-03-22 1957-10-03 Basf Ag Hochdruckschmieroele
DE1016876B (de) * 1956-03-22 1957-10-03 Basf Ag Hochdruckschmieroele
DE1026025B (de) * 1956-09-04 1958-03-13 Basf Ag Hochbelastbare Schmieroele
DE1076299B (de) * 1956-08-18 1960-02-25 Basf Ag Schmieroele

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB455305A (en) * 1934-04-24 1936-10-19 Du Pont Improvements in or relating to lubricants
FR953948A (fr) * 1946-10-08 1949-12-15 Bataafsche Petroleum Lubrifiant
FR960793A (de) * 1946-10-05 1950-04-25
US2574994A (en) * 1947-10-24 1951-11-13 Shell Dev Lubricating composition
GB669206A (en) * 1948-07-26 1952-03-26 Bataafsche Petroleum Improvements in and relating to lubricating grease

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB455305A (en) * 1934-04-24 1936-10-19 Du Pont Improvements in or relating to lubricants
FR960793A (de) * 1946-10-05 1950-04-25
FR953948A (fr) * 1946-10-08 1949-12-15 Bataafsche Petroleum Lubrifiant
US2574994A (en) * 1947-10-24 1951-11-13 Shell Dev Lubricating composition
GB669206A (en) * 1948-07-26 1952-03-26 Bataafsche Petroleum Improvements in and relating to lubricating grease

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1016875B (de) * 1956-03-22 1957-10-03 Basf Ag Hochdruckschmieroele
DE1016876B (de) * 1956-03-22 1957-10-03 Basf Ag Hochdruckschmieroele
DE1076299B (de) * 1956-08-18 1960-02-25 Basf Ag Schmieroele
DE1026025B (de) * 1956-09-04 1958-03-13 Basf Ag Hochbelastbare Schmieroele

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