DE1228363B - Organopolysiloxanmischpolymerisate als Schmierfett - Google Patents
Organopolysiloxanmischpolymerisate als SchmierfettInfo
- Publication number
- DE1228363B DE1228363B DEG37976A DEG0037976A DE1228363B DE 1228363 B DE1228363 B DE 1228363B DE G37976 A DEG37976 A DE G37976A DE G0037976 A DEG0037976 A DE G0037976A DE 1228363 B DE1228363 B DE 1228363B
- Authority
- DE
- Germany
- Prior art keywords
- weight
- copolymer
- polysiloxane
- units
- radical
- 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
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- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
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- C10N2010/00—Metal present as such or in compounds
- C10N2010/12—Groups 6 or 16
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/14—Group 7
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2010/00—Metal present as such or in compounds
- C10N2010/16—Groups 8, 9, or 10
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2020/00—Specified physical or chemical properties or characteristics, i.e. function, of component of lubricating compositions
- C10N2020/01—Physico-chemical properties
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/08—Solids
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2050/00—Form in which the lubricant is applied to the material being lubricated
- C10N2050/10—Form in which the lubricant is applied to the material being lubricated semi-solid; greasy
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
BUNDESREPUBLIK DEUTSCHLAND
/»Ilk,
DEUTSCHES mj9W>
PATENTAMT
AUSLEGESCHRIFT
Int. Cl.:
Nummer:
Aktenzeichen:
Anmeldetag:
Auslegetag:
Aktenzeichen:
Anmeldetag:
Auslegetag:
ClOm
Deutsche KL: 23 c -1/04
1228363
G37976IVc/23c
18.Juni 1963
10. November 1966
G37976IVc/23c
18.Juni 1963
10. November 1966
Es ist bekannt, Organopolysiloxane als Schmier-:
mittel zu verwenden. Ibxe Konsistenz kann man bekanntlich
durch Zusatz^ von organischen und anorga7
rüschen Fettverdickern ändern. Weiterhin ist es be-:
reits bekannt, ein Gemisch zweier verschiedener SiI-oxane unter Zusatz von Fettverdickern auf organischer
oder anorganischer Basis als Schmiermittel einzusetzen. y .'. ■
, Schmierfette auf Organopolysiloxanbasis werden häufig auch zum Schmieren von metallischen Teilen
verwendet. Zwar werden durch derartige Schmierfette die metallischen Teile selbst nicht angegriffen.
Es. hat sich jedoch herausgestellt, daß metallische Teile durch derartige Schmierfette nicht gegen korrodierende
Einflüsse in der gewünschten Weise geschützt werden. Dies list besonders bei aus Kupfer,
Kupferlegierungen oder Stahl bestehenden Teilen der Fall. Zur Beseitigung !dieses Mangels wurden bisher
den Schmierfetten korrosionshemmend wirkende Zusätze einverleibt. Diese Zusätze wirken sich je- ao
doch ungünstig auf die Eigenschaften, insbesondere die Wärmebeständigkeit, der Organopolysiloxane
aus.
Es wurde nun gefunden, daß dieser Nachteil nicht eintritt, wenn ein Mischpolymerisat der Formel .
Organopolysiloxanmischpolymerisate
als Schmierfett:
Anmelder:, ;.
General Electric Company,
Schenectady, N,Y. (V. St. A.)
Vertreter:
Dipl.-Ing. M. Licht, Dr. R. Schmidt,
Dipl.-Wirtsch.-Ing. A. Hansmann
und Dipl.-Phys.S. Herrmann, Patentanwälte,
München 2, Theresienstr. 33
Als Erfinder; benannt:
John Harold Wright, Waterford, N. Y. (V. St. A.)
Beanspruchte Priorität:
V. St. v. Amerika vom 25. Juni 1962 (205 064) - -
(R')2(R")SiO —
|
ΓΗ ■' 1
1 ·■ ■ |
—■ | R |
| I Si-O I |
b | Si-O I |
| I ■■■'.··· CH3 |
I R |
|
in dex R ein einwertiger, gegebenenfalls halogenierter Kohlenwasserstoff rest oder Cyanalkylrest, R' ein
Methyl- oder Phenylres^t, R" ein Methyl-, Phenyl- oder Wasserstoffrest i§t und b mindestens gleich 1,
c mindestens gleich 1 und b + c mindestens gleich 10 ist, zusammen mit einem Verdickungsmittel und
gegebenenfalls einem Polysiloxan der Formel
ν·.·,
·...,■■
' 1R4SiO4 -n
2
2
in der R die obige Bedeutung hat und η einen Wert zwischen 2,004 und 2,4 besitzt, wobei der Anteil an
Methylwasserstoffpolysiloxaneinheiten imMischpolymerisat 0,1 bis 2 Gewichtsprozent vom Gesamtgewicht
an Mischpolymerisat und Polysiloxan beträgt, als Schmierfett verwendet wird.
Als Polysiloxane verwendet man vorzugsweise solche, in denen wenigstens 50% der siliciumgebundenen
organischen Reste Methylreste sind. Ferner bevorzugt man flüssige Polysiloxane, die bei 250C
eine Viskosität zwischen etwa 10 und 100 000 cSt aufweisen. Die gegebenenfalls verwendeten flüssigen
Organopolysiloxane können gleiche oder verschiedene Siloxaneinheiten von unterschiedlicher Art und
Zusammensetzung enthalten, beispielsweise Triorganosiloxan- oder Diorganosiloxaneinheiten allein
oder in Verbindung mit Monoorganosiloxaneinheiten.
Zur Erzielung der erforderlichen Konsistenz können dem Mischpolymerisat die üblichen Verdickungsmittel
auf organischer oder anorganischer Basis zugesetzt werden. Beispiele für geeignete Verdickungsmittel
sind u. a.die Metallsalze der Fettsäuren mit wenigstens 8 Kohlenstoffatomen.
Obwohl die zugesetzte Menge an Verdickungsr mittel nicht entscheidend ist und in weiten Grenzen
variiert werden kann, hat man herausgefunden, daß die Menge gewöhnlich zwischen etwa 2 und 35 Gewichtsprozent,
vorzugsweise 2 bis 25 Gewichtsprozent, ausgehend vom Gewicht der Polysiloxane im
Fett betragen sollte.
Um eine befriedigende Korrosionsfestigkeit zu erzielen, müssen — bezogen auf das Gewicht des
Mischpolymerisats und des Polysiloxans — etwa 0,1 bis 2% Methylwasserstoffsiloxaneinheiten vorhanden
sein. Bei weniger als 0,1% Methylwasserstoffpolysiloxaneinheiten
wurde eine unzureichende Korrosionsverhütung bei der Berührung mit Kupfer, Kupfer-
609 710/272
legierungen und Stahl beobachtet. Beträgt der Anteil an Methylwasserstoffpolysiloxaneinheiten über 2 Gewichtsprozent,
dann stellte man fest, daß dasMethylwasserstoffpolysiloxan selbst eine Korrosion der
Kupfer-, Kupferlegierung- oder Stahlflächen, mit denen das Fett in Berührung gelangt, verursacht.
Daher muß das Verhältnis von Methylwasserstoffsiloxaneinheiten in dem flüssigen Mischpolymerisat
ursprünglich so gewählt werden, daß die Methylwasserstoffsiloxaneinheiten etwa 0,1 bis 2 Gewichtsprozent
des Gesamtgewichts des flüssigen Mischpolymerisats oder, falls ein Polysiloxan vorhanden ist,
vom Gesamtgewicht der beiden Komponenten ausmachen.
Die beanspruchten Schmierfette werden in üblicher Weise durch Mischen hergestellt.
Weitere übliche Zusätze können z.B. zur Verbesserung der Schmierfähigkeit und der Beständigkeit
der Fette beigegeben werden.
Die nachstehenden Ausführungsbeispiele sollen die Durchführung der Erfindung eingehender erläutern.
In jedem Fall wurde die Fettmasse durch Vermischen der flüssigen Polysiloxane mit dem Verdickungsmittel
in einer Farbmühle bereitet. Die Mischung wurde so lange gemahlen, bis ein gleichförmiges
Erzeugnis erhalten wurde. Die Korrosionsfestigkeit jeder Masse wurde durch Auftragen eines
Überzuges aus der Masse auf einen, frisch gereinigten, geschmirgelten und polierten Kupferstreifen ermittelt,
der nachfolgend in Wasser mit einer Temperatur von 700C getaucht wurde und so lange im
Wasser verblieb, bis eine Korrosion zu beobachten war. Die Korrosion zeigte sich dadurch an, daß der
Kupferstreifen, verglichen mit dem frischen Kupferstreifen, sich merklich, verfärbt hatte. Wurde ein
Kupferstreifen ohne jeglichen Fettüberzug in Wasser getaucht, dann verfärbte er sieh nach 4 Stunden,
Beispiel- 1 :
Ein flüssiges Methylwasserstoffsiloxan-Dimethylsiloxanmischpolymerisat
mit durch Trimethylsilyleinheiten gestoppter Kette wurde durch Hydrolysieren und Kondensieren einer Mischung von Methylwasserstofidichlorsilan
und Dimethyldichlorsilan und Trimethylchlorsilan in üblicher Weise hergestellt. Die
Anteile der verschiedenen Chlorsilane waren so ge^
wählt, daß das entstandene flüssige Polysiloxan 0,5 Gewichtsprozent Methylwasserstoffsiloxan, ausgehend
vom Gewicht der Flüssigkeit, enthielt und eine Viskosität von etwa 25'cSt bei 25° C besaß. Dadurch
entstand ein Stoff mit einer durch Trimethylsilyl gestoppten
Kette, der durchschnittlich ein Mischpolymerisat aus Methylwasserstoffsiloxan- und Dimethylsiloxaneinheiten
war. Aus dieser Flüssigkeit bereitete man ein Silikonfett, indem man 10 Gewichtsteile
eines feinzerteilten Siliciumdioxyd-Aerogels als Verdickungsmittel mit 100 Teilen der Flüssigkeit
mischte. Wurde eine derartige Fettmasse der oben beschriebenen Prüfung auf Korrosionsfestigkeit unter
worfen, dann zeigte es sich, daß der Kupferstreifen noch nach Ablauf von 100 Stunden einwandfrei war.
Nach dem Verfahren vom Beispiel 1 wurden Mischpolymerisate ausDimethylsiloxan- undMethylwasserstoffsiloxaneinheiten
mit einer durch Trimethylsilyleinheiten gestoppten Kette bereitet, die eine Viskosität von annähernd 25 cSt bei 25° C besaßen
und 1,0, 5,0, 10,0 und 20,0 Gewichtsprozent Methylwasserstoffpolysüoxan enthielten. Aus diesen
Flüssigkeiten wurden Fette hergestellt, indem man einen Teil jeder Flüssigkeit einem Dimethylpolysiloxan
mit durch Trimethylsüyleinheiten gestoppter Kette und einer Viskosität von 300 cSt in der Weise
zusetzte, daß ein Gehalt von 0,5 Gewichtsprozent Methylwasserstoffsiloxan, ausgehend vom Gewicht
der Flüssigkeiten, erhalten wurde. Jede Fettmasse enthielt IQ Gewichtsprozent, ausgehend vom Gewicht
der Flüssigkeiten, eines feinzerteilten Siliciumdioxyd-Aerogels als Verdickungsmittel. Jedes dieser
Fette wurde der oben beschriebenen Prüfung auf Korrosionsfestigkeit auf einer Kupferunterlage unterworfen,
und jede Probe war nach Ablauf von 100 Stunden noch einwandfrei.
Claims (1)
- Patentanspruch:Verwendung eines Mischpolymerisats der Formel(R')2(R")SiO-
H —. [R 1
ISi-O Ί
Si-O
1CH3 I
RSifR')2(R")in der R ein einwertiger, gegebenenfalls.halogenierter Kohlenwasserstoffrest oder Cyanalkylrest, R' ein Methyl-.oder Phenylrest, R" ein Methyl-, Phenyl- oder Wasserstöffrest ist und b mindestens gleich 1, c mindestens gleich 1 und b + c mindestens gleich 10 sind, zusammen mit einem Verdickungsmittel und gegebenenfalls einem Polysiloxan der FormelR4SiO4-,,in der R die obige Bedeutung hat und η einen Wert zwischen 2,004 und 2,4 besitzt, wobei der Anteil an Methylwasserstoffpolysiloxaneinheiten im Mischpolymerisat 0,1 bis 2 Gewichtsprozent vom Gesamtgewicht an Mischpolymerisat und Polysiloxan beträgt, als Schmierfett.In Betracht gezogene Druckschriften:
Deutsche Patentschrift Nr. 1170 099.609 710/272 11.66 © Bundesdruckerei Berlin
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US205064A US3145175A (en) | 1962-06-25 | 1962-06-25 | Grease composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1228363B true DE1228363B (de) | 1966-11-10 |
Family
ID=22760638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEG37976A Pending DE1228363B (de) | 1962-06-25 | 1963-06-18 | Organopolysiloxanmischpolymerisate als Schmierfett |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3145175A (de) |
| DE (1) | DE1228363B (de) |
| GB (1) | GB1044536A (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3269949A (en) * | 1963-08-30 | 1966-08-30 | Standard Oil Co | Grease composition |
| US3450736A (en) * | 1963-09-12 | 1969-06-17 | Mobil Oil Corp | Modified siloxane polymers and compositions containing same |
| NL132928C (de) * | 1966-04-14 | |||
| GB1178906A (en) * | 1966-09-15 | 1970-01-21 | Wacker Chemie Gmbh | Pastes Based on Organopolysiloxane Oils and Fillers |
| US4075115A (en) * | 1972-09-18 | 1978-02-21 | General Electric Company | Silicone fluid useful as a brake fluid |
| US4005023A (en) * | 1973-06-11 | 1977-01-25 | General Electric Company | Silicone fluid useful as a brake fluid |
| US4019997A (en) * | 1974-02-04 | 1977-04-26 | General Electric Company | Silicone fluid useful as a brae fluid |
| JPS6020997A (ja) * | 1983-07-13 | 1985-02-02 | Toshiba Silicone Co Ltd | トルクグリ−ス |
| CA1290137C (en) * | 1984-06-11 | 1991-10-08 | John L. Burba, Iii | Intercalations of crystalline lithium aluminates |
| JP3541390B2 (ja) * | 1991-02-22 | 2004-07-07 | 東レ・ダウコーニング・シリコーン株式会社 | グリース状シリコーン組成物およびその製造方法 |
| US5162460A (en) * | 1991-10-17 | 1992-11-10 | Dow Corning Corporation | Moisture-curable silicone corrosion resistant coatings |
| AU7116798A (en) * | 1997-04-16 | 1998-11-24 | University Of Connecticut, The | Silicon greases and methods for their production |
| JP6739951B2 (ja) * | 2016-03-11 | 2020-08-12 | 株式会社デンソー | グリース組成物、機械部材及びスタータオーバーランニングクラッチ |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1170099B (de) | 1960-05-16 | 1964-05-14 | Gen Electric | Schmierfett auf Organopolysiloxanbasis |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2491843A (en) * | 1946-03-21 | 1949-12-20 | Gen Electric | Liquid linear methylpolysiloxanes |
| US2828261A (en) * | 1954-02-08 | 1958-03-25 | Standard Oil Co | Inorganic gel-thickened lubricant having good temperature susceptibility and dynamicwater stability characteristics |
| US2945809A (en) * | 1954-08-05 | 1960-07-19 | Standard Oil Co | Thickened lubricant and process for preparing the same |
| US2890170A (en) * | 1956-09-06 | 1959-06-09 | Dow Corning | Organosiloxane greases |
-
1962
- 1962-06-25 US US205064A patent/US3145175A/en not_active Expired - Lifetime
-
1963
- 1963-06-07 GB GB22800/63A patent/GB1044536A/en not_active Expired
- 1963-06-18 DE DEG37976A patent/DE1228363B/de active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1170099B (de) | 1960-05-16 | 1964-05-14 | Gen Electric | Schmierfett auf Organopolysiloxanbasis |
Also Published As
| Publication number | Publication date |
|---|---|
| US3145175A (en) | 1964-08-18 |
| GB1044536A (en) | 1966-10-05 |
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