EP0435745B1 - Schmierfett für homokinetische Kupplung - Google Patents
Schmierfett für homokinetische Kupplung Download PDFInfo
- Publication number
- EP0435745B1 EP0435745B1 EP90403671A EP90403671A EP0435745B1 EP 0435745 B1 EP0435745 B1 EP 0435745B1 EP 90403671 A EP90403671 A EP 90403671A EP 90403671 A EP90403671 A EP 90403671A EP 0435745 B1 EP0435745 B1 EP 0435745B1
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- EP
- European Patent Office
- Prior art keywords
- weight
- molybdenum
- grease composition
- compound
- grease
- Prior art date
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- C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
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- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/30—Refrigerators lubricants or compressors lubricants
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/32—Wires, ropes or cables lubricants
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- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/34—Lubricating-sealants
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- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/36—Release agents or mold release agents
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/38—Conveyors or chain belts
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/40—Generators or electric motors in oil or gas winning field
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/42—Flashing oils or marking oils
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/44—Super vacuum or supercritical use
-
- 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
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/50—Medical uses
Definitions
- the present invention relates to greases for constant velocity joints, especially plunging type constant velocity joints.
- plunging type constant velocity joints include double offset type constant velocity joints (DOJ type) and tripod type constant velocity joints (TJ type).
- lubricants are filled therein in order to reduce frictional resistance and to improve slidability.
- Fig. 2 is a graph which shows relations among speed, axial force and sound pressure in the bodies of cars equipped with DOJ.
- the present invention relates to a grease composition for constant velocity joints which comprises base greases comprising mineral oils and urea compounds and (1) 0.5 - 5 % by weight of molybdenum dithiocarbamate compounds and 0.5 - 5 % by weight of molybdenum dithiophosphate compounds as organic molybdenum compounds, (2) 0.5 - 10 % by weight of zinc dithiophosphate compounds as extreme pressure agents, and (3) 10 - 60 % by weight of copolymers having a molecular weight of 300 - 4,000 and comprising ethylene and branched ⁇ -olefin.
- the grease of the present invention may further contain antioxidants, oiliness agents, rust preventives and the like.
- the base oils used in the present invention are mineral oil or synthetic hydrocarbon lubricating oils.
- thickening agents there may be used urea compounds (diurea compounds) which are superior in heat resistance to metallic soaps such as lithium soap.
- Zinc compounds as an extreme pressure compound used in the present invention are zinc dialkyl dithiophosphate, zinc dialryl dithiophosphate, or mixtures thereof.
- the said zinc dialkyl dithiophosphate and zinc diaryl dithiophostate are represented by the following formula wherein R' represents a primary or secondary alkyl group or aryl group.
- organic zinc compounds as well as the above organic molybdenum compounds are very effective extreme pressure agents. Addition of too much amount of zinc compounds does not bring about further increase in effect but rather decrease, and hence an amount of the zinc compounds is 0.5 - 10 % by weight, preferably 0.5 - 5 % by weight.
- copolymers used in the present invention are oligomers of ethylene and branched ⁇ -olefins and are represented by the formula: wherein R'' represents a C3-C10 alkyl group and x, y and p represent integers of 1-145, 1-95 and 1-60, respectively.
- the above oligomers are synthetic oils of hydrocarbons having a molecular weight of 300 - 4,000 and free from polar groups and are effective for reducing axial force under low pressure.
- Addition of copolymers in a too much amount provides no further increase in effect but rather decrease and hence an addition amount is 0.5 - 60 % by weight, preferably 5 - 30 % by weight, more preferably 10 - 30 % by weight.
- a thorough mixture of a base grease comprising purified mineral oil (same as used in Comparative Example 1) as a base oil (83 % by weight) and a diurea compound (10 % by weight), and an organic molybdenum compound 1 (molybdenum dialkyl(C1-C24) dithiocarbamate (4 % by weight), zinc dialkyl(primary and secondary alkyl) and diaryl dithiophosphate as an extreme pressure agent (2 % by weight) and octyldiphenylamine as an antioxidant (1 % by weight) was processed by a three-roll mill. Properties of the resulting grease composition were measured and the results are shown in Table 1.
- Grease composition was obtained in the same manner as in Comparative Example 2 except that 2 % by weight of the organic molybdenum compound 1 (molybdenum dialkyl(C1-C24 alkyl) dithiocarbamate) and 2 % by weight of a molybdenum compound 2 (molybdenum dialkyl(primary and secondary alkyl) and diaryl dithiophsphate) were used as organic molybdenum compounds. Properties of this composition were measured and the results are shown in Table 1.
- the organic molybdenum compound 1 molybdenum dialkyl(C1-C24 alkyl) dithiocarbamate
- a molybdenum compound 2 molybdenum dialkyl(primary and secondary alkyl) and diaryl dithiophsphate
- Table 1 shows that the greases of the present invention have low friction coefficient and provide very low axial force.
- the greases of the present invention have low friction coefficient, are excellent in reducing axial force, can reduce discomfort for passengers and can provide comfortable driving environment.
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Lubricants (AREA)
Claims (6)
- Schmierfett für ein Gleichlaufgelenk, enthaltend ein Grundfett, in dem ein Mineralöl, eine Harnstoffverbindung und die folgenden Verbindungen enthalten sind:(1) 0,5 bis 5 Gew.-%, bezogen auf das Schmierfett, eines Molybdändithiocarbamats und 0,5 bis 5 Gew.-%, bezogen auf das Schmierfett, eines Molybdändithiophosphats als organische Molybdänverbindungen,(2) 0,5 bis 10 Gew.-%, bezogen auf das Schmierfett, an Zinkdithiophosphat als ein Mittel für extremen Druck und(3) 10 bis 60 Gew.-%, bezogen auf das Schmierfett, eines Copolymers aus Ethylen und einem verzweigten α-Olefin.
- Schmierfett nach Anspruch 1, worin das Molybdändithiocarbamat ein Molybdändialkyldithiocarbamat ist.
- Schmierfett nach Anspruch 1, worin das Molybdändithiophosphat mindestens eine Verbindung ist, die aus Molybdändialkyldithiophosphaten und Molybdändiaryldithiophosphaten ausgewählt ist.
- Schmierfett nach Anspruch 1, worin das Zinkdithiophosphat als ein Mittel für extremen Druck mindestens eine Verbindung ist, die aus Zinkdialkyldithiophosphaten und Zinkdiaryldithiophosphaten ausgewählt ist.
- Schmierfett nach Anspruch 5, worin das Olygomer ein Molekulargewicht von 300 bis 4000 aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33670289 | 1989-12-27 | ||
JP336702/89 | 1989-12-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0435745A1 EP0435745A1 (de) | 1991-07-03 |
EP0435745B1 true EP0435745B1 (de) | 1993-11-10 |
Family
ID=18301917
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90403671A Expired - Lifetime EP0435745B1 (de) | 1989-12-27 | 1990-12-19 | Schmierfett für homokinetische Kupplung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0435745B1 (de) |
DE (1) | DE69004550T2 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1723268B (zh) * | 2002-12-10 | 2010-11-24 | 国际壳牌研究有限公司 | 脲润滑脂组合物 |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2915611B2 (ja) * | 1991-04-01 | 1999-07-05 | 協同油脂株式会社 | 等速ジョイント用グリース組成物 |
JP2989311B2 (ja) * | 1991-04-30 | 1999-12-13 | 協同油脂株式会社 | 等速ジョイント用グリース組成物 |
FR2684108B1 (fr) * | 1991-11-27 | 1994-10-28 | Mobil Oil France | Nouvelle graisse destinee notamment a etre utilisee dans des joints homocinetiques. |
CA2093029C (en) * | 1992-04-14 | 2003-07-29 | Jon C. Root | Lubricants, particularly lubricating grease compositions for constant velocity universal joints |
JP3320569B2 (ja) * | 1994-10-21 | 2002-09-03 | 協同油脂株式会社 | 等速ジョイント用グリース組成物 |
GB9505938D0 (en) * | 1995-03-23 | 1995-05-10 | Exxon Research Engineering Co | Extreme pressure additive combination and lubricants containing it |
US5858931A (en) * | 1995-08-09 | 1999-01-12 | Asahi Denka Kogyo K.K | Lubricating composition |
CA2187474C (en) * | 1995-10-12 | 2003-12-02 | Asahi Denka Kogyo Kk | LUBRICATING COMPOSITION |
EP1169421B1 (de) * | 1999-03-15 | 2003-01-08 | Shell Internationale Researchmaatschappij B.V. | Fettzusammensetzung für homokinetische kupplung |
JP2000303087A (ja) * | 1999-04-21 | 2000-10-31 | Showa Shell Sekiyu Kk | 等速ジョイント用グリース組成物 |
JP4405202B2 (ja) * | 2002-12-10 | 2010-01-27 | 昭和シェル石油株式会社 | ウレアグリース組成物 |
JP5379343B2 (ja) * | 2006-05-10 | 2013-12-25 | 昭和シェル石油株式会社 | 等速ジョイント用グリース組成物 |
US20080039348A1 (en) * | 2006-08-09 | 2008-02-14 | Chevron Oronite Company Llc | Low phosphorus lubricating oil composition having lead corrosion control |
WO2010027019A1 (ja) | 2008-09-05 | 2010-03-11 | Ntn株式会社 | グリース組成物、該グリース組成物を封入した転がり軸受および自在継手 |
FR2949786B1 (fr) | 2009-09-10 | 2013-07-05 | Total Raffinage Marketing | Composition de graisse. |
DE102015103440A1 (de) | 2015-03-09 | 2016-09-15 | Fuchs Petrolub Se | Verfahren zur Herstellung von Polyharnstoff-verdickten Schmierfetten auf Basis von Lignin-Derivaten, derartige Schmierfette und deren Verwendung |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6346299A (ja) * | 1986-01-16 | 1988-02-27 | Ntn Toyo Bearing Co Ltd | プランジング型等速ジョイント用グリース |
JPS63227697A (ja) * | 1987-03-17 | 1988-09-21 | Shin Etsu Chem Co Ltd | 粘着性グリ−ス組成物 |
US4764293A (en) * | 1987-08-28 | 1988-08-16 | Witco Corporation | Lubricant compositions |
US4904399A (en) * | 1989-03-31 | 1990-02-27 | Amoco Corporation | Process for preventing grease fires in steel mills and other metal processing mills |
-
1990
- 1990-12-19 DE DE90403671T patent/DE69004550T2/de not_active Expired - Fee Related
- 1990-12-19 EP EP90403671A patent/EP0435745B1/de not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1723268B (zh) * | 2002-12-10 | 2010-11-24 | 国际壳牌研究有限公司 | 脲润滑脂组合物 |
Also Published As
Publication number | Publication date |
---|---|
DE69004550D1 (de) | 1993-12-16 |
EP0435745A1 (de) | 1991-07-03 |
DE69004550T2 (de) | 1994-05-11 |
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