DE1263960C2 - Schmiermittel - Google Patents
SchmiermittelInfo
- Publication number
- DE1263960C2 DE1263960C2 DE1962S0080181 DES0080181A DE1263960C2 DE 1263960 C2 DE1263960 C2 DE 1263960C2 DE 1962S0080181 DE1962S0080181 DE 1962S0080181 DE S0080181 A DES0080181 A DE S0080181A DE 1263960 C2 DE1263960 C2 DE 1263960C2
- Authority
- DE
- Germany
- Prior art keywords
- sarcosine
- calcium acetate
- calcium
- oil
- dispersion
- 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
Links
Classifications
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- C—CHEMISTRY; METALLURGY
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- C10M1/00—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants
- C10M1/08—Liquid compositions essentially based on mineral lubricating oils or fatty oils; Their use as lubricants with additives
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- C10M2201/02—Water
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- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
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- C10M2201/103—Clays; Mica; Zeolites
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Description
Il
R — C — N — CH2COOH
CH3
CH3
Schmiermittel, enthaltend ein Gemisch aus zwei einzeln als Schmierölzusätze bekannten Verbindüngen
sowie gegebenenfalls weitere übliche Zusätze, dadurch gekennzeichnet, daß
es ein Gemisch aus Calciumacetat und einem N-acylsubstituierten Sarkosin der Formel
Il
R — C — N — CH2COOH
CH3 '5
in welcher R einen aliphatischen Kohlenwasserstoffin der R ein gesättigter oder ungesättigter C8^24- rest mit 8 bis 24 Kohlenstoffatomen, der sowohl
Alkylrest ist, enthält. "" gesättigt als auch ungesättigt sein kann, darstellt
Beispiele für Sarkosinderivate sind:
N-Pelargonoylsarkosin.
N-Undecyloylsarkosin,
N-Undecyloylsarkosin,
N-Lauroylsarkosin,
N-Myristoylsarkosin,
N-Palmitoylsarkosin.
N-Palmitoylsarkosin.
N-Stearoylsarkosin.
N-Oleoylsarkosin,
N-Linoleoylsarkosin,
N-Arachidoylsarkosin,
N-Behenoylsarkosin.
N-Behenoylsarkosin.
N-Hyenoylsarkosin.
Es kann sowohl wasserfreies als auch hydratisiertes Calciumacetat verwendet werden. Das Calciumacetat
kann entweder vorgebildet sein, oder es kann in situ gebildet werden. Bei Verwendung von vorgebildetem
Calciumacetat wird die Dispersion hergestellt, indem man eine Mischung aus dem Calciumacetat, dem
N-Acylsarkosin und der ölgrundlage bildet und die Mischung während eines kurzen Zeitraums, d. h. von
einigen Sekunden bis zu 30 Minuten, bei einer Temperatur von 25 bis 200 C und vorzugsweise von 50
bis 150 C rührt. Obgleich stabile Dispersionen bei Raumtemperatur mit nur einem kurzen Mischen zu
Beginn des Calciumacetats, der Sarkosinverbindung und des Öls und mehrstündigem Stehenlassen der
Mischung gebildet werden können, wird ihre Bildung beträchtlich durch Erhitzen und Rühren der Mischung
beschleunigt.
Das Calciumacetat kann in situ hergestellt werden, indem man Calciumoxyd oder Calciumhydroxyd mit
entweder Essigsäureanhydrid oder Essigsäure in Gegenwart des Öls neutralisiert und anschließend
die Mischung zur Entiernung des Wassers erhitzt.
Die sulfurierten, basischen Calciumalkylphenolate, welche noch dem erfindungsgemäßen Schmieröl zugesetzt
werden können, sind in den USA.-Patenischriften 26 80 096 und 30 36 971 beschrieben.
Die erfindungsgemäßen Schmiermittel können weitere übliche Zusätze, z. B. Seifen- oder Geliermitlei, enthalten.
Die erfindungsgemäßen Schmiermittel können weitere übliche Zusätze, z. B. Seifen- oder Geliermitlei, enthalten.
Als Schmierölgrundlage können natürliche oder synthetische öle, ζ. B. Mineralöle, polymerisierte
Olefine, Silicone, Fluorkohlenstoffe, Perfluoralkyläther.
Esteröle, Silicaiester od. dgl. verwendet werden. Die öle sollen eine Viskosität (SUS) von mehr
als 40 Sekunden bei 38''C, vorzugsweise von 60 bis 6000 Sekunden bei 38 1C, besitzen.
Es ist bekannt, daß Calciumacetat bei der Dispergierung
in einem Schmieröl diesem wünschenswerte Verbesserungen verleiht, wie Lasttragfähigkeit und
Anti-Abnutzungseigenschaften. Auch auf Grund seiner Eigenschaft, Säure zu neutralisieren, ist Calciumacetat
ein besonders erwünschter Zusatz für Schmieröle, welche in mit sehr schwefelhaltigen Brennstoffen betriebenen
Maschinen verwendet werden, wie Schiffsdieselmaschinen.
Einfache Dispersionen von Calciumacetat in Schmieröl sind jedoch instabil, so daß sich das Calciumacetat
ausscheidet. Um diese Schwierigkeit zu überwinden, war es üblich, öle vom Emulsionstyp,
d. h. solche, welche durch Emulgierung einer Wasserlösung vom Calciumacetat mit Schmieröl gebildet
wurden, zu verwenden. Diese Emulsionsöle waren jedoch nicht völlig zufriedenstellend. Sie neigen so
auf Grund ihres Wassergehalts zur Steigerung des Korrosionsproblems, und sie sind unter den verschiedenen,
bei Lagerung und Verwendung auftretenden Bedingungen nicht stabil. Beispielsweise
besteht bei den hohen Temperaturen, welche während der Lagerung in den Maschinenräumen von Schiffen
auftreten, die Neigung zur Zersetzung der Emulsion. Andererseits kann unter den niedrigen Temperaturbedingungen,
welche in kaltem Klima häufig auftreten, die wäßrige Phase zur Ausfrierung kommen,
so daß die Emulsion zerstört wird.
Es wurde nun gefunden, daß Schmiermittel diese Nachteile nicht besitzen, wenn sie ein Gemisch aus
Calciumacetat und einem N-acylsubstituierten Sarkosin der Formel
Il
R-C-N-CH2COOH
CH3
CH3
enthalten, worin R einen aliphatischen Kohlenwassersloffrest mit 8 bis 24 Kohlenstoffatomen, der sowohl
gesättigt als auch ungesättigt sein kann, darstellt.
Bei dieser Versuchsreihe wurde Calciumacetat in einem lösungsmittelraffinierten Coastalöl mit einer
Viskosität von 60 SUS bei 99°C dispergiert. Die Menge des dispergierten Calciumacetats betrug
10 Gewichtsprozent, bezogen auf die gesamte Dispersion.
Es wurden verschiedene bekannte Dispergiermittel und oberflächenaktive Stoffe mit Oleylsarkosin verglichen.
Die zugesetzte Menge betrug in jedem Falle 2,5 Gewichtsprozent
Die Dispersionen wurden hergestellt, indem ein Brei aus Calciumacetat und 35 Gewichtsprozent des
Öls unter Rühren bereitet wurde. Dann wurde das Dispergiermittel zugesetzt, und das sich ergebende
Gemisch wurde auf eine Temperatur von etwa 132° C erhitzt. Nachfolgend wurde der Rest des Öls eingemischt
und die sich ergebende Dispersion wurde unter fortgesetztem Rühren auf 21° C abgekühlt und
24 Stunden bei dieser Temperatur gehalten. Die erzielten Ergebnisse sind in der Tabelle I angegeben:
Calciumacetat, in dem Mineralöl dispergiert, das
vorstehend in Verbindung mit dem Beispiel 1 beschrieben wurde. Es wurde Oleylsarkosin als Dispergiermittel
verwendet Die Menge des Salzes in der Dispersion betrug in allen Fallen 10 Gewichtsprozent,
bezogen auf die gesamte Dispersion, und die Dispersion enthielt jeweils 2,5 Gewichtsprozent
Oleylsarkosin, bezogen auf die gesamte Dispersion. Die Arbeitsweise, die zum Dispergieren der Salze
und zum Prüfen der Stabilität der Dispersionen Anwendung fand, war die gleiche wie bei dem vorstehenden
Beispiel 1. Die erzielten Ergebnisse sind in der Tabelle II aufgeführt
Calciumacetat
Magnesiu«iacetat
Calciumformiat
Calciumpropionat
Magnesiu«iacetat
Calciumformiat
Calciumpropionat
keine Trennung
Trennung
Trennung
Trennung
Trennung
Trennung
Trennung
Oleylsarkosin
Calciumsulfonat
Dioleylmalat
Hexadecylamin
1-Octadecanol
keine Trennung
Trennung
Trennung
Trennung
Trennung
35
Bei dieser Versuchsreihe wurden verschiedene Metallsalze von organischen Säuren, einschließlich
Aus den vorstehenden Versuchswerten geht hervor, daß Oleylsarkosin Calciumacetat-Öl-Dispersionen
wesentlich besser stabilisiert als andere bekannte oberflächenaktive Mittel. Gemäß Tabelle I tritt nur
bei Verwendung von Oleylsarkosin keine Trennung der Dispersion ein, während mit den anderen bekannten
oberflächenaktiven Mitteln eine Trennung stattfindet.
Aus der Tabelle II ist ersichtlich, daß Oleylsarkosin die Calciumacetatdispersion stabilisiert, während
andere eng verwandte organische Calciumsalze und Magnesiumacetat unwirksam sind.
Die überraschende Wirkung der beanspruchten Kombination ist somit offensichtlich.
Claims (1)
- Patentanspruch:9 2Al Die Schmiereigenschaften von Schmierölen mit dererfindungsgemäßen Kombination können durch den Zusatz eines öllöslichen, kohlensäurehaltigen, sulfurierten, basischen Calciumalkylphenolats noch weiter verbessert werden.Die erfindungsgemäße Kombination eignet sich auch fur Schmierfette.Die N-acylsubstituierten Sarkosine besitzen die Formel
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US120938A US3182020A (en) | 1961-06-30 | 1961-06-30 | Stabilized calcium acetate oil dispersions |
US141580A US3206399A (en) | 1961-09-29 | 1961-09-29 | Diesel lubricating oil |
US19786662A | 1962-05-28 | 1962-05-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1263960B DE1263960B (de) | 1968-03-21 |
DE1263960C2 true DE1263960C2 (de) | 1975-08-28 |
Family
ID=27382542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1962S0080181 Expired DE1263960C2 (de) | 1961-06-30 | 1962-06-29 | Schmiermittel |
Country Status (7)
Country | Link |
---|---|
US (1) | US3182020A (de) |
BE (1) | BE619604A (de) |
DE (1) | DE1263960C2 (de) |
DK (1) | DK106349C (de) |
GB (1) | GB1017441A (de) |
NL (2) | NL280245A (de) |
SE (1) | SE307998B (de) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3259577A (en) * | 1963-02-19 | 1966-07-05 | Socony Mobil Oil Co Inc | Lubricant and additives therefor |
US3278426A (en) * | 1964-11-05 | 1966-10-11 | Chevron Res | Carboxylic acid amine salts or carboxylic acid amides-calcium acetate complexes |
US3278432A (en) * | 1965-03-23 | 1966-10-11 | Mobil Oil Corp | Extreme pressure lubricants containing sulfur |
US3437594A (en) * | 1966-11-25 | 1969-04-08 | Mobil Oil Corp | Alkaline earth metal carboxylate dispersions |
US3506573A (en) * | 1968-05-29 | 1970-04-14 | Mobil Oil Corp | Greases containing a hydrogenated olefin polymer vehicle,organophilic clay thickener and calcium acetate dispersion |
US3909426A (en) * | 1973-10-03 | 1975-09-30 | Mobil Oil Corp | Extreme pressure grease composition |
US4052322A (en) * | 1976-06-24 | 1977-10-04 | Texaco Inc. | Corrosion-inhibited grease compositions |
DE4222185A1 (de) * | 1992-07-06 | 1994-01-13 | Schaeffler Waelzlager Kg | Wälzlagerkäfig aus elastischem Kunststoff |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2790779A (en) * | 1953-07-27 | 1957-04-30 | Geigy Chem Corp | Rust preventive compositions containing monoamidocarboxylic acids |
US2841555A (en) * | 1956-03-02 | 1958-07-01 | Texas Co | Metal nu-acyl sarcosinate thickened lubricating oils |
NL110612C (de) * | 1957-08-06 | |||
US2940932A (en) * | 1957-10-01 | 1960-06-14 | Exxon Research Engineering Co | Lubricants containing stabilized dispersions of fatty acid salts |
US2929783A (en) * | 1957-10-24 | 1960-03-22 | Exxon Research Engineering Co | Lubricating oil compositions containing stabilized salt suspension |
-
0
- NL NL132709D patent/NL132709C/xx active
- NL NL280245D patent/NL280245A/xx unknown
- BE BE619604D patent/BE619604A/xx unknown
-
1961
- 1961-06-30 US US120938A patent/US3182020A/en not_active Expired - Lifetime
-
1962
- 1962-06-28 GB GB24866/62A patent/GB1017441A/en not_active Expired
- 1962-06-29 DE DE1962S0080181 patent/DE1263960C2/de not_active Expired
- 1962-06-29 DK DK291862AA patent/DK106349C/da active
-
1964
- 1964-05-15 SE SE6014/64A patent/SE307998B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
NL132709C (de) | |
SE307998B (de) | 1969-01-27 |
DK106349C (da) | 1967-01-23 |
DE1263960B (de) | 1968-03-21 |
NL280245A (de) | |
BE619604A (de) | |
GB1017441A (en) | 1966-01-19 |
US3182020A (en) | 1965-05-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
E77 | Valid patent as to the heymanns-index 1977 |