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DE1241024B - Schmierfett - Google Patents

Schmierfett

Info

Publication number
DE1241024B
DE1241024B DES75487A DES0075487A DE1241024B DE 1241024 B DE1241024 B DE 1241024B DE S75487 A DES75487 A DE S75487A DE S0075487 A DES0075487 A DE S0075487A DE 1241024 B DE1241024 B DE 1241024B
Authority
DE
Germany
Prior art keywords
grease
compound
naphthalimidazole
viscosity
weight
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
DES75487A
Other languages
English (en)
Inventor
Jacques Louis Zakin
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.)
Mobil Oil AS
Original Assignee
Mobil Oil AS
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 AS filed Critical Mobil Oil AS
Publication of DE1241024B publication Critical patent/DE1241024B/de
Pending legal-status Critical Current

Links

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    • C10M115/00—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof
    • C10M115/08—Lubricating compositions characterised by the thickener being a non-macromolecular organic compound other than a carboxylic acid or salt thereof containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B57/00—Other synthetic dyes of known constitution
    • C09B57/12—Perinones, i.e. naphthoylene-aryl-imidazoles
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    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
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    • C10M2227/08—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions having metal-to-carbon bonds
    • C10M2227/081—Organic non-macromolecular compounds containing atoms of elements not provided for in groups C10M2203/00, C10M2207/00, C10M2211/00, C10M2215/00, C10M2219/00 or C10M2223/00 as ingredients in lubricant compositions having metal-to-carbon bonds with a metal carbon bond belonging to a ring, e.g. ferocene
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    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
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    • C10M2229/04—Siloxanes with specific structure
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    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
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    • C—CHEMISTRY; METALLURGY
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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
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  • Lubricants (AREA)

Description

BUNDESREPUBLIK DEUTSCHLAND
Int. Cl.:
ClOm
DEUTSCHES
PATENTAMT C 1OM * P
Deutsche Kl.: 23 c-1/01
6' 1'O-/Lf
η η π 3 ο
AUSLEGESCHRIFT
Nummer:
Aktenzeichen:
Anmeldetag:
Auslegetag:
1241024
S75487IVc/23c 28. August 1961 24. Mai 1967
Bekanntlich besteht z. B. bei Flugzeugen, Geschossen, Raketen und Raumflugkörpern ein großer Bedarf an Schmierfetten, welche gegenüber hohen Temperaturen, wie bei Temperaturen über 315°C, beständig sind.
Es wurde nun gefunden, daß man Schmierfette von ausgezeichneten Eigenschaften erhält, wenn man einem mineralischen oder synthetischen Schmieröl ein Naphthalimidazol der Formel Schmierfett
und
(trans)
O R'" O
20
Anmelder:
Mobil Oil Corporation,
New York, N. Y. (V. St. A.)
Vertreter:
Dr. E. Wiegand und Dipl.-Ing. W. Niemann,
Patentanwälte, München 15, Nußbaums«. 10
Als Erfinder benannt:
Jacques Louis Zakin, Hewlett, N. Y. (V. St. A.)
Beanspruchte Priorität:
V. St. v. Amerika vom 31. August 1960 (53 042)
(eis) in welcher R', R" und R'" gleich oder verschieden
ei—/N—n
H5C2O
sind und Wasserstoff, Alkyl, Alkoxy oder Halogen bedeuten und x, y und ζ jeweils Zahlen von 0 bis sind, als Geliermittel zusetzt.
Unter die Naphthalimidazole fallen z. B. O
trans- und cis-Form
trans- und cis-Form
OC2H5
trans- und cis-Form
709 587/502
Besonders bevorzugt hierbei ist die Verbindung (1). Es ist ein feines Pulver, mit einem spezifischen Gewicht von 1,58, einem Schüttvolumen von 1,45 kg je Liter und einer ölabsorption von 45 (in einem leicht verdickten öl).
Verfahren zur Herstellung der Naphthalinimidazole sind in den USA.-Patentschriften 1588 451, 1 888 624 bis 1 888 626 und 1 927 928 beschrieben. Verbindung (1) kann durch Erhitzen einer Mischung aus trans- und cis-Form von (2) mit Äthylalkohol und Ätzkali, Filtrieren des so gebildeten Additionsproduktes und Hydrolysieren mit Wasser hergestellt werden. Verbindung (1) kann ebenfalls durch Behandlung einer Mischung aus trans- und cis-Form von (2) mit Schwefelsäure hergestellt werden. Eine Mischung von (3) wird durch Kondensation von 1,4,5,8-Naphthalintetracarbonsäure mit 4-Äthoxy-o-phenylendiamin gebildet.
Obwohl die Verbindungen gemäß der Erfindung vorzugsweise in im wesentlichen reiner Form verwendet werden können, können sie auch in Form verdünnter Pigmente (verdünnter Toner) verwendet werden. In der letzteren Form sind sie mit einem inerten anorganischen Material, wie einem Aluminiumoxydhydrat, Bariumsulfat oder Tonerde, versetzt. Wenn solche inerten anorganischen Materialien vorliegen, sind sie in Mengen bis zu 70 Gewichtsprozent, vorzugsweise weniger als 50 Gewichtsprozent, vorhanden.
Es können mehr als eine der hier in Betracht gezogenen Verbindungen miteinander in einem Schmierfett verwendet werden.
Die beanspruchten Naphthalimidazole sind bei hohen Temperaturen bis zu 343 C und darüber stabil und zur Verwendung in Schmierfetten, die bei Hochtemperaturarbeitsweisen angewendet werden, sehr geeignet.
Als Basisöle können mineralische oder synthetische öle von Schmierölviskosität verwendet werden. Geeignete Mineralöle haben eine Viskosität (S.U.V.) von mindestens 40 Sekunden bei 38 C, und insbesondere sind diejenigen mit einer Viskosität im Bereich von 60 bis 6000 Sekunden bei 38 C geeignet.
Als synthetische öle werden Polypropylen, PoIypropylenglykol, Trimethylolpropanester, Neopenthyl- und Pentaerythritester, Di-(2-äthylhexyl)-sebacat, Di-(2-äthylhexyl)-adipat, Dibutylphthalat, PoIyäthylenglykol-di-(2-äthylhexoat), Fluorkohlenstoffe, Silikatester, Silane, Ester von Säuren des Phosphors, flüssige Harnstoffe, Ferrocenderivate, hydrierte Mineralöle, kettenartige Polyphenyle, Siloxane und Silicone (Polysiloxane), alkylsubstituierte Diphenyläther, beispielsweise ein butylsubstituierter Bis-(p-phenoxyphenyl)-äther, Phenoxyphenyläther verwendet.
Besonders bevorzugt sind hier Polysiloxane und m-Bis-(m-phenoxyphenoxy)-benzol.
Die Naphthalimidazol-Gelierungsmittel werden in Mengen von 5 bis 50 Gewichtsprozent, bezogen auf das Gesamtschmierfett und vorzugsweise von 15 bis 30 Gewichtsprozent, den Schmierölen zugesetzt.
Auch andere übliche Zusätze, z. B. Antioxydationsmittel, Korrosionsinhibitoren, Viskositätsindexmittel, Füllstoffe, können den Schmierfetten zugesetzt werden. Darunter fallen kolloidales Siliciumdioxyd, Calciumacetat, Calciumcarbonat und Molybdändisulfid.
Die beanspruchten Schmierfette werden durch Mischen des Naphthalimidazols in dem Basisöl hergestellt. Vorteilhaft ist das Benetzen der Naphthalimidazolverbindung mit einer flüchtigen Flüssigkeit, wie Methylalkohol, und anschließende Zugabe des Basisöls. Die Materialien werden miteinander gemahlen und dann erwärmt, um den Alkohol zu entfernen. Andere vorteilhafte Arbeitsweisen sind die Sprüh- oder Spritzarbeitsweisen, welche in den USA.-Patentschriften 2 950 248 und 2 950 249 beschrieben sind.
Ein typisches Schmierfett wird durch Dispergieren von 20 Gewichtsprozent der Verbindung (1) in einem Polymethylphenylsiloxan mit einer Viskosität von 117 cSt bei 38 C hergestellt. Verbindung (1) wird mit Methylalkohol benetzt und das Siloxan dazugegeben. Dieses Gemisch wird mit einem Spatel auf einer Glasplatte gerieben, bis es halbwegs homogen ist, und dann erwärmt, um den Alkohol zu vertreiben. Die Dispersion wird dann in einer Hoover-Muller-Vorrichtung mit vier Arbeitskreisläufen je 100 Umdrehungen unter Wiederverteilung des Schmierfettes nach jedem Arbeitskreislauf gewalzt bzw. gemahlen.
Die Verdickungskraft von einem Naphthalimidazol (1) wurde durch Messen der Fließeigenschaften des vorstehend beschriebenen Schmierfettes bestimmt. Die Fließeigenschaften werden auf einem Ferranti-Platten- und -Konus-Viskosimeter gemessen. Eine Viskosität bei 1000 Sek. ] und 38 C wird als Vergleich genommen. Das Schmierfett hatte einen Wert von 11,9 Poise gegenüber einem Wert von 2,98 für Siloxan allein.
Die Ergebnisse zeigen, daß das Naphthalimidazol das Basisöl in einem größeren Ausmaß eindickt, als dies durch überschlagsmäßige Anwendung der Guth-Simha-Modifikation der Einsteinschen Gleichung vorhergesagt wird:
V-- »/o(l 2,5 Φ 14,1 Φ2)
in welcher
H ------ Viskosität des »Schmierfettes«,
Vo = Viskosität des Basisöls (Träger),
Φ .- Volumenfraktion des Naphthalimidazols.
Verbindung (1) hat beispielsweise eine Dichte von 1,58 und Siloxan eine Dichte von 1,07. So wurde ein Wert von 4,4 Poise vorhergesagt.
r, = 2,98
1 r 2.5
0,2 1,58
0,2 , 0,8 14,1
0,2
1,58
0,2 0,8
1,58 1,07
1,58 1,07 / ν - 4,4. "
An Stelle eines Wertes von 4,4 ist der tatsächliche 65 temperatur-Schmierfette besitzen, ergibt sich aus
Wert überraschenderweise 11,9. den Ergebnissen, welche mit Verbindung (1) erhalten
Daß die Naphthalimidazole gemäß der Erfindung werden. Die Verbindung wird in einem Ofen bei
die gewünschte thermische Stabilität für Hoch- 104 C getrocknet, 65 Stunden auf 232 C, 20 Stunden
auf288°C und zuletzt 20 Stunden auf 343°C erhitzt. Die Verbindung, die in Form eines feinen Pulvers vorliegt, wird in einem offenen Glasbecher in den Ofen eingebracht. Am Ende des Versuches wird ein Gewichtsverlust von 11% festgestellt, und die Verbindung behielt ihre pulverförmige Struktur.
Während die Verbindung (1) bei 343 0C unzersetzt blieb, zersetzen sich die meisten üblichen Verdickungsmittel bei deren Temperatur.
Die beanspruchten Schmierfette sind in einem weiten Bereich technischer Anwendungen zu verwenden. Zusätzlich können Schmierfette, welche aus einem der vorstehend beschriebenen Verdickungsmittel und einem Trägerstoff, der gegenüber Strahlung widerstandsfähig ist, hergestellt sind (wie Phenoxyphenyläther), zum Schmieren von Anlagen verwendet werden, die Atomstrahlungen ausgesetzt werden, die für Schmierfette schädlich sind.

Claims (1)

  1. Patentanspruch:
    Schmierfett auf der Basis eines mineralischen oder synthetischen Schmieröles, dadurch gekennzeichnet, daß es 5 bis 50 Gewichtsprozent eines Naphthalimidazols der allgemeinen Formel
    Il
    20 in welcher R',, R" und R'" gleich oder verschieden sind und Wasserstoff, Alkyl, Alkoxy oder Halogen bedeuten und x, y und ζ jeweils Zahlen von 0 bis 3 sind, enthält.
DES75487A 1960-08-31 1961-08-28 Schmierfett Pending DE1241024B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US53042A US3102860A (en) 1960-08-31 1960-08-31 Naphthalic imidazole grease

Publications (1)

Publication Number Publication Date
DE1241024B true DE1241024B (de) 1967-05-24

Family

ID=21981551

Family Applications (1)

Application Number Title Priority Date Filing Date
DES75487A Pending DE1241024B (de) 1960-08-31 1961-08-28 Schmierfett

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Country Link
US (1) US3102860A (de)
DE (1) DE1241024B (de)
FR (1) FR1298802A (de)
GB (1) GB969784A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3242077A (en) * 1962-12-14 1966-03-22 Texaco Inc Grease composition
US4040968A (en) * 1976-08-23 1977-08-09 Shell Oil Company Ketoheterobicyclic grease thickeners
CN103725030A (zh) * 2013-12-24 2014-04-16 徐州市格瑞颜料有限公司 一种还原艳橙gr的制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2679480A (en) * 1952-11-01 1954-05-25 Standard Oil Co Indogen thickened grease composition
BE550292A (de) * 1955-08-15
US2880176A (en) * 1956-12-24 1959-03-31 Texas Co Lubricating grease comprising methylchlorophenyl silicone polymer thickened with a high melting diazo compound
US2880177A (en) * 1956-12-28 1959-03-31 Texas Co Lubricating greases thickened with benzidine diazo compounds
US2851418A (en) * 1956-12-28 1958-09-09 Texas Co Lubricating greases thickened with 3-nu-aryl-carbamyl-2-hydroxy-1-naphthyleneazoarenes
US2908644A (en) * 1957-11-25 1959-10-13 Texaco Inc Lubricating greases thickened with metal salts of sulfonated hydroxy azo compounds
NL111386C (de) * 1957-12-16

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Publication number Publication date
US3102860A (en) 1963-09-03
GB969784A (en) 1964-09-16
FR1298802A (fr) 1962-07-13

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