EP0757712B1 - Schmiermittelzusammensetzung - Google Patents

Schmiermittelzusammensetzung Download PDF

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Publication number
EP0757712B1
EP0757712B1 EP95916764A EP95916764A EP0757712B1 EP 0757712 B1 EP0757712 B1 EP 0757712B1 EP 95916764 A EP95916764 A EP 95916764A EP 95916764 A EP95916764 A EP 95916764A EP 0757712 B1 EP0757712 B1 EP 0757712B1
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EP
European Patent Office
Prior art keywords
lubricant composition
component
composition according
alkyl
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.)
Expired - Lifetime
Application number
EP95916764A
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English (en)
French (fr)
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EP0757712A1 (de
Inventor
Andrew Jonathan Markson
John William Anthony Pragnell
Mark Anthony Edwards
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.)
Castrol Ltd
Original Assignee
Castrol Ltd
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    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
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    • C10M105/00—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound
    • C10M105/08—Lubricating compositions characterised by the base-material being a non-macromolecular organic compound containing oxygen
    • C10M105/32—Esters
    • C10M105/38—Esters of polyhydroxy compounds
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    • C10M129/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen
    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/04—Hydroxy compounds
    • C10M129/10—Hydroxy compounds having hydroxy groups bound to a carbon atom of a six-membered aromatic ring
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    • C10M129/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing oxygen having a carbon chain of less than 30 atoms
    • C10M129/26—Carboxylic acids; Salts thereof
    • C10M129/28—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M129/30—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms
    • C10M129/32—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms monocarboxylic
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    • C10M129/26—Carboxylic acids; Salts thereof
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    • C10M129/30—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms
    • C10M129/34—Carboxylic acids; Salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having 7 or less carbon atoms polycarboxylic
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    • C10M133/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms
    • C10M133/04—Amines, e.g. polyalkylene polyamines; Quaternary amines
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    • C10M133/30—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms containing a nitrogen-to-oxygen bond
    • C10M133/32—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing nitrogen having a carbon chain of less than 30 atoms containing a nitrogen-to-oxygen bond containing a nitro group
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    • C10M133/38—Heterocyclic nitrogen compounds
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    • C10N2040/02—Bearings

Definitions

  • This invention relates to a lubricant composition and is particularly concerned with a transmission lubricant suitable, for example, for helicopter transmission systems.
  • DE-A-2039785 discloses a load carrying additive composition for a gas turbine engine.
  • the load carrying additive composition comprises a synthetic ester base stock fluid having a viscosity of 5.6 to 6.0 cs. at 99 °C (210 °F) (see the examples).
  • US-A-3694382 discloses a lubricant for a gas turbine engine.
  • the lubricant comprises a synthetic ester base stock having a viscosity ranging from 4.0 to 9.1 cs. at 99 °C (210 °F).
  • FR-A-2215462 discloses a lubricant having a mineral oil as its base stock.
  • WO-A-9410270 discloses a corrosion inhibiting lubricating composition
  • a corrosion inhibiting lubricating composition comprising a synthetic base stock having a viscosity of at least 4.9 cSt at 100 °C.
  • the present invention provides a lubricant composition
  • a lubricant composition comprising:
  • At least one base stock of the base component is preferably a synthetic ester base stock, especially a polyol ester base stock.
  • the synthetic polyolester which preferably forms a base stock of the lubricating composition of the present invention may be made from C 5 to C 12 monocarboxylic acids esterified with polyols or polyol ethers such as neopentylglycol, dimethylolpropane, trimethylolpropane, pentaerythritol or dipentaerythritol. These are conventional synthetic ester base stocks.
  • Preferred esters are those which are described in U.S. Patent 4826633.
  • the viscosity may be adjusted to lie within the required range by inclusion of one or more viscosity index improvers.
  • the base component must have a viscosity in the range of 8.5 to 9.5 cSt, preferably 8.75 to 9.25 mm 2 /s (cSt), at 100°C.
  • the base component may comprise a single polyol ester but is more usually a mixture of polyol esters, for example, a mixture of a polyol ester having a viscosity of about 4.0 cSt at 100°C with a polyol ester having a viscosity of about 12.0 mm 2 /s (cSt) at 100°C.
  • Preferred synthetic polyol esters are reaction products of pentaerythritol and/or trimethylolpropane and an acid mixture comprising C 5 to C 10 straight and branched chain acids.
  • the antioxidant component b) may be a hindered phenolic antioxidant such as butylated hydroxytoluene, suitably present in an amount of 0.01 to 5%, preferably 0.4 to 0.8%, by weight of the lubricant composition.
  • component b) may comprise an aromatic amine antioxidant such as mono-octylphenylalphanapthylamine or p,p-dioctyldiphenylamine, used singly or in admixture.
  • the amine anti-oxidant component is suitably present in a range of from 0.01 to 5% by weight of the lubricant composition, more preferably 0.5 to 1.5%.
  • the neutral organic phosphate which forms component c) of the formulation is present in an amount of 1.5 to 2.5% by weight of the composition.
  • the neutral organic phosphate is also a conventional ingredient of lubricating compositions and any such neutral organic phosphate falling within the formula as previously defined may be employed.
  • Tri-cresyl phosphate is a preferred phosphate for use in the present invention.
  • Components d), e) and f) are intended to provide a corrosion inhibiting three component system.
  • the combination has been found to enable the provision of lubricant compositions capable of passing United States Navy corrosion inhibition requirements (Ball Corrosion Test - ARP 4249) in which a result of 50% non corroded specimen is deemed a satisfactory corrosion protection requirement.
  • the dicarboxylic acid forming the first component of the anti-corrosion combination may be any dicarboxylic acid falling within the definition given hereinbefore.
  • the dicarboxylic acid may be present in a proportion of up to 0.15% by weight of the composition. It should be noted however, that it is desirable that sebacic acid or an equivalent thereof should always be present in the composition even if another dicarboxylic acid falling within the above definition is present because sebacic acid or an equivalent of it may be necessary to meet parts of the specification other than the ball corrosion test, for example, for satisfactory lead corrosion resistance.
  • dibasic acids other than sebacic acids, which may be used in the present invention, are adipic acid, azelaic acid, dodecanedioic acid, 3-methyladipic acid, 3-nitrophthalic acid, 1,10-decanedicarboxylic acid, and fumaric acid.
  • the second component of the anti-corrosion combination is a straight or branch-chained, saturated or unsaturated monocarboxylic acid or ester thereof which may optionally be sulphurised in an amount up to 35% by weight.
  • the acid is a C 4 to C 22 straight chain unsaturated monocarboxylic acid.
  • the preferred concentration of this additive is from 0.001% to 0.35% by weight of the total lubricant composition.
  • the preferred monocarboxylic acid is sulphurised oleic acid.
  • other suitable materials are oleic acid itself; valeric acid and erucic acid.
  • the third component of the anti-corrosion combination is a triazole as previously defined.
  • the triazole should be used at a concentration from 0.005% to 0.25% by weight of the total composition.
  • the preferred triazole is benzotriazole.
  • Component g) of the composition comprises at least one phosphorus containing extreme pressure additive.
  • additives are amine phosphate extreme pressure additives such as that known under the trade name IRGALUBE® 349 and/or triphenyl phosphorothionate extreme pressure/anti-wear additives such as that known under the trade name IRGALUBE® TPPT .
  • Such amine phosphates are suitably present in an amount of from 0.01 to 2%, preferably 0.2 to 0.6% by weight of the lubricant composition while such phosphorothionates are suitably present in an amount of from 0.01 to 3%, preferably 0.5 to 1.5% by weight of the lubricant composition.
  • a mixture of an amine phosphate and phosphorothionate is employed.
  • the amounts of the additive are selected so as to comply with the United States Navy requirement for the Ryder gear test, conducted at 100°C, (average of 6 runs) of 200 (relative rating, % Herco® A as reference fluid).
  • the resulting composition was found to give a value of 204.7 in the Ryder gear test, 100°C (as relative rating, % Herco® A) and pass rating in the Ball Corrosion Test (in accordance with ARP method 4249).

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  • Lubricants (AREA)

Claims (15)

  1. Schmiermittelzusammensetzung, enthaltend
    a) eine Basiskomponente, in der ein oder mehrere synthetische Grundmaterialien vorliegen und die eine Viskosität im Bereich von 8,5 bis 9,5 mm2/s (cSt) bei 100°C aufweist,
    b) mindestens ein Antioxidationsmittel, das aus aromatischen Aminen und gehinderten Phenolen ausgewählt ist,
    c) mindestens ein neutrales organisches Phosphat der Formel (R1O)3PO, in der R1 einen Tolyl-, Phenyl-, Xylyl-, Alkyl- oder Cycloalkylrest bedeutet, wobei der Alkyl- oder Cycloalkylrest bis zu 10 Kohlenstoffatome enthält und wobei das neutrale organische Phosphat in einer Menge von 1,5 bis 2,5 Gew% der Zusammensetzung vorliegt,
    d) mindestens eine gesättigte und/oder ungesättigte Dicarbonsäure der allgemeinen Formel
    Figure 00140001
    worin x+y+z eine ganze Zahl im Bereich von 2 bis 22 einschließlich sowie mindestens einer der Reste R1 bis R5 einen Carbonsäurerest bedeuten und die üblichen Reste R1 bis R5 aus Alkyl, Hydroxy, Nitro, Amino, Carboxyl, Wasserstoff oder Alkylderivaten hiervon ausgewählt sind, wobei Alkyl eine kurze Kette von bis zu 5 Kohlenstoffatomen darstellt, und/oder eine Dicarbonsäure mit einer der drei Formeln
    Figure 00150001
    worin R'1 die Gruppe -COOH, Alkyl, Hydroxy, Nitro, Amino, Wasserstoff oder ein Alkylderivat hiervon, R'2 die Gruppe -COOH und n eine ganze Zahl von 1 bis 4 einschließlich, wenn R'1 die Gruppe -COOH darstellt, oder eine ganze Zahl von 2 bis 4 einschließlich, wenn R'1 nicht die Gruppe -COOH darstellt, bedeuten,
    e) mindestens eine geradkettige und/oder verzweigtkettige gesättigte oder ungesättigte Monocarbonsäure, die gegebenenfalls in einer Menge, die bis zu 35 Gew% betragen kann, sulfuriert ist, und/oder einen Ester einer solchen Säure,
    f) mindestens ein Triazol der Formel
    Figure 00150002
    worin R''1 die Gruppe -COOH oder ein Alkylderivat hiervon oder einen kurzkettigen Alkylrest von bis zu 5 Kohlenstoffatomen, n die Zahl 0 oder eine ganze Zahl zwischen 1 und 3 einschließlich und R''2 Wasserstoff, Morpholino, Alkyl, Amido, Amino, Hydroxy oder Alkyl oder ein arylsubstituiertes Derivat hiervon oder ein Triazol, das aus 1,2,4-Triazol, 1,2,3-Triazol, 5-Anilino-1,2,3,4-thiatriazol, 3-Amino-1,2,4-triazol, 1-H-Benzotriazol-1-yl-methylisocyanid, Methylen-bis-benzotriazol und Naphthotriazol ausgewählt ist, und
    g) mindestens ein phosphorhaltiges Extremdruckadditiv,
    wobei die Komponenten b) bis g) in Mengen vorliegen, die derart gewählt sind, daß sie den Anforderungen der US-Marine für den Ryder-Getriebetest (Ryder gear test), durchgeführt bei 100°C, von 200 (relative Bewertung, % Herco® A als Bezugsfluid) entsprechen.
  2. Schmiermittelzusammensetzung nach Anspruch 1, worin mindestens ein Grundmaterial der Basiskomponente ein Polyolester ist.
  3. Schmiermittelzusammensetzung nach Anspruch 2, worin das Polyolester-Grundmaterial eine oder mehrere C5- bis C12-Monocarbonsäuren, verestert mit einem oder mehreren Polyolen oder Polyolethern, enthält.
  4. Schmiermittelzusammensetzung nach einem der Ansprüche 1 bis 3, worin die Grundkomponente eine Viskosität im Bereich von 8,75 bis 9,25 mm2/s (cSt) bei 100°C aufweist.
  5. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin das Antioxidationsmittel ein gehindertes phenolisches Antioxidationsmittel enthält, das in einer Menge von 0,4 bis 0,8 Gew% der Zusammensetzung vorliegt.
  6. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin das Antioxidationsmittel ein Antioxidationsmittel in Form eines aromatischen Amins enthält, das in einer Menge von 0,5 bis 1,5 Gew% der Zusammensetzung vorliegt.
  7. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die gesättigte und/oder ungesättigte Dicarbonsäurekomponente (d) in einer Menge von bis zu 0,15 Gew% der Zusammensetzung vorliegt.
  8. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die gesättigte und/oder ungesättigte Dicarbonsäurekomponente (d) Sebacinsäure enthält.
  9. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die Monocarbonsäurekomponente (e) in einer Menge von 0,001 bis 0,35 Gew% der Zusammensetzung vorliegt.
  10. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die Monocarbonsäurekomponente (e) sulfurierte Ölsäure enthält.
  11. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die Triazolkomponente (f) in einer Menge von 0,005 bis 0,25 Gew% der Zusammensetzung vorliegt.
  12. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die Triazolkomponente (f) Benzotriazol enthält.
  13. Schmiermittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die Extremdruckadditiv-Komponente (g) ein Aminphosphat-Extremdruckadditiv enthält, das in einer Menge von 0,2 bis 0,6 Gew% der Zusammensetzung vorliegt.
  14. Schmiermiittelzusammensetzung nach einem der vorstehenden Ansprüche, worin die Extremdruckadditiv-Komponente (g) ein Thiophosphatextremdruckadditiv enthält, das in einer Menge von 0,5 bis 1,5 Gew% der Zusammensetzung vorliegt.
  15. Hubschraubergetriebeschmiermittel, enthaltend die Komponenten (a) bis (g), wie sie in einem der vorstehenden Ansprüche definiert sind.
EP95916764A 1994-04-26 1995-04-25 Schmiermittelzusammensetzung Expired - Lifetime EP0757712B1 (de)

Applications Claiming Priority (3)

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GB9408235 1994-04-26
GB9408235A GB9408235D0 (en) 1994-04-26 1994-04-26 Lubricant composition
PCT/GB1995/000941 WO1995029214A1 (en) 1994-04-26 1995-04-25 Lubricant composition

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EP0757712A1 EP0757712A1 (de) 1997-02-12
EP0757712B1 true EP0757712B1 (de) 2000-03-22

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US6043199A (en) * 1997-08-26 2000-03-28 Exxon Research And Engineering Co. Corrosion inhibiting additive combination for turbine oils
US5955403A (en) * 1998-03-24 1999-09-21 Exxon Research And Engineering Company Sulphur-free, PAO-base lubricants with excellent anti-wear properties and superior thermal/oxidation stability
JP2000169871A (ja) * 1998-12-08 2000-06-20 Nippon Mitsubishi Oil Corp 潤滑油組成物
US6074992A (en) * 1999-02-02 2000-06-13 Union Carbide Chemicals & Plastics Technology Corporation Functional fluid compositions
EP1632555B1 (de) * 2000-02-09 2012-12-19 Citizen Holdings Co., Ltd. Schmierölzusammensetzung und diese verwendende Uhr
US6573223B1 (en) * 2002-03-04 2003-06-03 The Lubrizol Corporation Lubricating compositions with good thermal stability and demulsibility properties
GB0226726D0 (en) * 2002-11-15 2002-12-24 Bp Oil Int Method
US7648948B2 (en) * 2005-04-08 2010-01-19 Exxonmobil Chemical Patents Inc. Additive system for lubricants
US20080139427A1 (en) * 2006-12-11 2008-06-12 Hutchison David A Lubricating composition
JP5827782B2 (ja) 2009-05-08 2015-12-02 出光興産株式会社 生分解性潤滑油組成物
JP6669343B2 (ja) * 2015-02-27 2020-03-18 出光興産株式会社 生分解性潤滑油組成物
CN106590869A (zh) * 2016-11-28 2017-04-26 广西大学 一种全合成四连杆摆块机构热气机润滑剂组合物

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FR2051665A1 (de) * 1969-07-10 1971-04-09 Ethyl Corp
BE754710A (fr) * 1969-08-12 1971-02-11 Stauffer Chemical Co Composition de lubrifiant synthetique
FR2215462A1 (de) * 1973-01-25 1974-08-23 Exxon Research Engineering Co
CN1030934A (zh) * 1987-07-30 1989-02-08 钱江宁 高速车制动液及其生产方法
US4981602A (en) * 1988-06-13 1991-01-01 The Lubrizol Corporation Lubricating oil compositions and concentrates
CN1070679A (zh) * 1991-09-17 1993-04-07 岳江 合成刹车油及其制法
GB2272000B (en) * 1992-10-30 1997-03-26 Castrol Ltd A method of inhibiting corrosion

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ATE190997T1 (de) 2000-04-15
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DE69515861D1 (de) 2000-04-27
ES2148513T3 (es) 2000-10-16
DK0757712T3 (da) 2000-08-28
CN1151174A (zh) 1997-06-04
WO1995029214A1 (en) 1995-11-02
JPH10503535A (ja) 1998-03-31
AU695511B2 (en) 1998-08-13
PT757712E (pt) 2000-09-29
NZ284520A (en) 1997-09-22
EP0757712A1 (de) 1997-02-12
KR100339777B1 (ko) 2002-11-13
JP3780323B2 (ja) 2006-05-31
CN1043053C (zh) 1999-04-21
GR3033741T3 (en) 2000-10-31
AU2313595A (en) 1995-11-16
CA2188936A1 (en) 1995-11-02

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