Classifications

• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M169/06—Mixtures of thickeners and additives
• • C—CHEMISTRY; METALLURGY
  • 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
  • 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
  • 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
  • C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
  • C10M119/24—Lubricating compositions characterised by the thickener being a macromolecular compound containing nitrogen
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M135/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing sulfur, selenium or tellurium
  • C10M135/12—Thio-acids; Thiocyanates; Derivatives thereof
  • C10M135/14—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond
  • C10M135/18—Thio-acids; Thiocyanates; Derivatives thereof having a carbon-to-sulfur double bond thiocarbamic type, e.g. containing the groups
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M137/00—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus
  • C10M137/02—Lubricating compositions characterised by the additive being an organic non-macromolecular compound containing phosphorus having no phosphorus-to-carbon bond
  • C10M137/04—Phosphate esters
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/006—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
  • C10M2215/026—Amines, e.g. polyalkylene polyamines; Quaternary amines used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/08—Amides
  • C10M2215/0813—Amides used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/10—Amides of carbonic or haloformic acids
  • C10M2215/1013—Amides of carbonic or haloformic acids used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/10—Amides of carbonic or haloformic acids
  • C10M2215/102—Ureas; Semicarbazides; Allophanates
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/10—Amides of carbonic or haloformic acids
  • C10M2215/102—Ureas; Semicarbazides; Allophanates
  • C10M2215/1026—Ureas; Semicarbazides; Allophanates used as thickening material
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/12—Partial amides of polycarboxylic acids
  • C10M2215/121—Partial amides of polycarboxylic acids used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/22—Heterocyclic nitrogen compounds
  • C10M2215/2206—Heterocyclic nitrogen compounds used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2215/22—Heterocyclic nitrogen compounds
  • C10M2215/225—Heterocyclic nitrogen compounds the rings containing both nitrogen and oxygen
  • C10M2215/227—Phthalocyanines
  • C10M2215/2275—Phthalocyanines used as thickening agents
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2217/044—Polyamides
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
  • C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • C10M2217/045—Polyureas; Polyurethanes
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
  • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
  • C10M2219/066—Thiocarbamic type compounds
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
  • C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
  • C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
  • C10M2219/066—Thiocarbamic type compounds
  • C10M2219/068—Thiocarbamate metal salts
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
• • C—CHEMISTRY; METALLURGY
  • 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
  • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
  • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
  • C10M2223/04—Phosphate esters
  • C10M2223/041—Triaryl phosphates
• • 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
  • C10N2010/12—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
  • C10N2040/00—Specified use or application for which the lubricating composition is intended
  • C10N2040/06—Instruments or other precision apparatus, e.g. damping fluids

Definitions

• the present invention relates to urea grease compositions and to gears containing such compositions.
• Petroleum cost has increased sharply since so-called Oil Shock, and resourcing saving and energy saving ideas have been constantly intended in every industrial field, reflecting its influence.
• CVJ constant velocity joints
• CVJ which is also called constant velocity universal joint
• the lubricating agents used for the CVJ are exposed to severer condition as a motor vehicle achieves higher power and higher speed and CVJ itself becomes compact, and therefore, a grease is demanded which reduces friction and wear on sliding portions.
• a seal boot member is required to be mounted on CVJ to prevent leaking of a grease and to prevent invasion of foreign materials and water from outside.
• chloroprene rubber is generally used and polyester resins are also commonly used.
• a grease which is excellent in low friction and wear resistance suppresses vibration and noise of a vehicle body at a time of starting and accelerating and during driving. Moreover, due to its temperature suppressing effect, durability of a seal boot member can be improved. However, excessive increase of temperature promotes ageing of the seal boot member and degradation of a lubricating agent and extremely shortens the life of CVJ.
• lithium-based greases have been conveniently used using sulfur-based compounds such as sulfurized fat and oil, sulfurized olefin and the like, lead naphthenate, metal dithiophosphate, metal dithiocarbamate-based additive and the like. Recently, a lithium complex grease and a urea grease which are superior in heat resistance to lithium-based greases have been increasingly used.
• U.S. Patent No. 4,514,312 discloses a grease using aromatic amine phosphate as an organic additive containing no sulfur in a urea grease.
• U.S. Patent No. 4,840,740 discloses a grease comprising a urea gresae, an organic molybdenum compound, and zinc dithiophosphate.
• JP-B Japanese Patent Publication
• JP-B No. 04-34590(1992 ) discloses a urea grease comprising as an essential component a sulfur-phosphorus-based extreme pressure additive comprising
• JP-A Japanese Patent Application Laid-Open
• JP-A No. 08-157859 (1996 ) discloses the use of as additives a molybdenum dialkyldithiocarbamate sulfide and triphenylphosphorothionate
• the present invention relates to a urea grease which is excellent in frictional properties and wear resistance and also has good fitting property to sealants such as chloroprene rubber and polyester resin. More particularly, the present invention relates to a urea grease composition suitable for application to such parts to be grease-lubricated as constant velocity joints, ball joints, and ball bearings in motor vehicles and bearings and gears of various industrial equipments such as the steel and industrial machines and machine tools.
• the present invention relates to a urea grease composition
• a urea grease composition comprising a urea grease and as additives
• B a triphenyl phosphate represented by the formula:
• the compounds corresponding to the above-mentioned component (A) have a high melting point.
• examples of those compounds include diethyl sulfide-molybdenum dithiocarbamate, dibutyl-molybdenum dithiocarbamate, diisobutyl sulfide-molybdenum dithiocarbamate, di (2-ethylhexyl) sulfide-molybdenum dithiocarbamate, diamyl sulfide-molybdenum dithiocarbamate, diisoamyl sulfide-molybdenum dithiocarbamate, dilauryl sulfide-molybdenum dithiocarbamate, distearyl sulfide-molybdenum dithiocarbamate.
• the amount added is from 0.5 to 10% by weight, preferably from 0.5 to 5% by weight based on the total weight.
• the amount added is less than 0.5% by weight, effect of improvement in friction resistance and wear resistance is generally insufficient, and when over 10% by weight, no further improvement will generally occur.
• triphenyl phosphate has a melting point of 50°C and is solid at ambient temperature, it is preferred that the powder is blended with the base grease at a temperature of not less than 50°C.
• the amount of component (B) preferably is from 0.1 to 10% by weight, more preferably from 0.1 to 5% by weight based on the total weight. When the amount used is less than 0.1% by weight, improvement in friction resistance and wear resistance properties generally cannot be achieved, and when over 10% by weight, further lubricating ability generally cannot be obtained.
• urea compound any of known thickening agents of urea type can be used.
• diurea, triurea and tetraurea may be used.
• a mineral oil and/or a synthetic oil can be used as the base oil. If the urea compound is used as a thickening agent it is preferably applied in an amount from 2 to 35% by weight based on the total weight of the base oil and the urea compound.
• additives such as an antioxidant, anticorrosion agent, extreme pressure agent, polymer and the like can further be added to the composition of the present invention.
• the urea grease composition according to the invention are especially suitable for use in gears, more specifically constant velocity joints. Therefore, the present invention further relates to gears, more specifically constant velocity joints, containing such grease.
• the formulations of the base greases are as described below.
• As the base oil a purified mineral oil having a viscosity of 15 mm 2 /sec at 100°C was used.
• Hydrogenated caster oil fatty acid was dissolved in the base oil, to which was added an aqueous lithium hydroxide solution for neutralization, and the mixture was dehydrated during the reaction. After completion of the dehydration, azelaic acid was added. The reaction was carried out with the help of an aqueous lithium hydroxide solution in the amount necessary for neutralization.
• the lithium azelate and lithium 12-hydroxystearate soap were mixed and dispersed uniformly to obtain a grease.
• the amount of lithium 12-hydroxystearate as a thickening agent was 7.5% by weight and the amount of lithiumazelate was 2.5% by weight, respectively, based on the total weight of the base oil and the thickening agent.
• Friction coefficient after 15 minutes was measured under the following conditions using a Falex testing machine (according to IP/241/69). Rotation speed : 290 rpm Load : 890N (200 lb) Temperature : room temperature Time : 15 minutes Amount of grease : about 1 g of grease was applied on a test piece
• Sealants which were chloroprene rubber of a polyester resin were immersed in respective grease compositions and tested under the following conditions according to the vulcanized rubber physical test of JIS K6301. The tensile strength and elongation before and after the test were measured and change (%) was obtained.
• A-2 is a molybdenum dialkyldithiocarbamate sulfide, SAKURALUBE 600, available from Asahi Denka Kogyo K.K.. *3* : B is a triphenyl phosphate.
• Example 5 6 7 Formulation (% by weight) Base grease Diurea grease 93.0 Tetraurea grease 95.0 96.0 Additive A-1 *1 2.0 2.0 A-2 *2 3.0 1.0 3.0 B *3 2.0 1.0 2.0 Total 100.00 100.00 100.00 Test result Friction coefficient ( ⁇ ) 0.083 0.088 0.082 Wear resistance (mm) 0.41 0.42 0.38 Chloroprene rubber Change in Tensile strength (%) -6.3 -8.1 -3.9 Change in Elongation (%) +5.6 +5.2 +4.1 Polyester resin Change in Tensile strength (%) -14.6 -16.5 -4.8 Change in Elongation (%) -1.9 -10.6 -5.9 *1 : A-1 is a molybdenum dialkyldithiocarbamate sulfide, MOLYVANA A, available from Vanderbilt Co..
• A-2 is a molybdenum dialkyldithiocarbamate sulfide, SAKURALUBE 600, available from Asahi Denka Kogyo K.K.. *3 : B is a triphenyl phosphate.
• A-2 is a molybdenum dialkyldithiocarbamate sulfide, SAKURALUBE 600, available from Asahi Denka Kogyo K.K..
• *3 B is a triphenyl phosphate.
• Vanlube 592 is a trade name of R.T. Vanderbilt Co. Inc., and a viscous liquid (190 SUS/100°C) comprising an aromaticaminephosphate.
• *5 Lubrizol 1360 is a zinc dialkyldithiophosphate.
• Lubrizol 5006 is a sulfurized fat and oil.
• *7 Lubrizol 5340L is a sulfurized olefin.
• Dailube L-30 is a lead naphthenate of Dainippon Ink and Chemicals, Inc.
• A-1 is a molybdenum dialkyldithiocarbamate sulfide, MOLYVAN A, available from Vanderbilt Co.
• A-2 is a molybdenum dialkyldithiocarbamate sulfide, SAKURALUBE 600, available from Asahi Denka Kogyo K.K..
• B is a triphenyl phosphate.
• Vanlube 592 is a trade name of R.T. Vanderbilt Co. Inc., and a viscous liquid (190 SUS/100°C) comprising an aromaticaminephosphate.
• *5 Lubrizol 1360 is a zinc dialkyldithiophosphate.
• Lubrizol 5006 is a sulfurized fat and oil.
• *7 Lubrizol 5340L is a sulfurized olefin.
• Dailube L-30 is a lead naphthenate of Dainippon Ink and Chemicals, Inc.
• Table 5 Comparative Example 1 2 3 4 5 Test result Friction coefficient ( ⁇ ) 0.144 0.126 0.116 0.120 0.103 Wear resistance (mm) 0.56 0.58 0.44 0.51 0.41 Chloroprene rubber Change in Tensile Strength (%) -5.3 -12.1 -18.4 -9.4 -16.9 Change in Elongation (%) -0.4 -4.1 -2.2 +29.5 +34.1 Polyester resin Change in Tensile strength (%) -1.9 -14.2 -4.9 -36.0 +2.7 Change in Elongation (%) -3.2 +8.8 -0.5 -38.6 +34.3 Table 6 Comparative Example 6 7 8 9 10 Test result Friction coefficient ( ⁇ ) 0.123 0.119 0.123 0.119 0.117 Wear resistance (mm) 0.41 0.42 0.44 0.40 0.41 Chloroprene rubber Change in Tensile Strength (%) -53.0 -74.8 -13.2 -10.0 -16.6 Change
• Comparative Examples 1 to 7 are all smaller as compared with those of Comparative Examples 1 to 10.
• Comparative Examples 5, 6, 7, 9 and 10 provide the same degree of good results as the examples according to the invention.
• these Comparative Examples are inferior in compatability to chloroprene rubber and/or polyester resin.
• Comparative Example 5 gives a large change in elongation of chloroprene rubber and polyester resin.
• Comparative Example 6 gives a large change in tensile strength and elongation of chloroprene rubber and polyester resin.
• Comparative Examples 9 and 10 give relatively large change in elongation of a polyester resin.
• Examples 1 to 7 give an excellent friction coefficient and wear resistance and also an excellent fitting property to sealants of chloroprene rubber and polyester resins.
• the grease of the present invention has a low friction coefficient and is excellent in wear resistance. As a result, vibration and noise of CVJ of motor vehicles are suppressed. Further, the grease of the present invention reduces friction in ball joints and wheel bearings of motor vehicles and other various industry machine apparatuses, and can lengthen the life of machine parts.
• the grease of the present invention is excellent in the fitting property to chloroprene rubber and polyester resin, and delays the degradation of the sealant of a sealed apparatus even at high temperature.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Organic Chemistry (AREA)
• Lubricants (AREA)
• Fats And Perfumes (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Applications (1)

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• 1996
  • 1996-10-18 JP JP29727896A patent/JP3833756B2/ja not_active Expired - Lifetime
• 1997
  • 1997-10-16 AR ARP970104775A patent/AR009120A1/es active IP Right Grant
  • 1997-10-16 ZA ZA9709263A patent/ZA979263B/xx unknown
  • 1997-10-16 MY MYPI97004860A patent/MY115558A/en unknown
  • 1997-10-16 CO CO97060780A patent/CO4890881A1/es unknown
  • 1997-10-17 KR KR10-1999-7003290A patent/KR100503107B1/ko not_active IP Right Cessation
  • 1997-10-17 CA CA002268286A patent/CA2268286C/en not_active Expired - Fee Related
  • 1997-10-17 BR BR9711936-9A patent/BR9711936A/pt not_active Application Discontinuation
  • 1997-10-17 SK SK480-99A patent/SK286548B6/sk not_active IP Right Cessation
  • 1997-10-17 AU AU51211/98A patent/AU722529B2/en not_active Ceased
  • 1997-10-17 DE DE69740119T patent/DE69740119D1/de not_active Expired - Lifetime
  • 1997-10-17 CN CN97199344A patent/CN1079822C/zh not_active Expired - Lifetime
  • 1997-10-17 TR TR1999/00840T patent/TR199900840T2/xx unknown
  • 1997-10-17 WO PCT/EP1997/005914 patent/WO1998017748A1/en active IP Right Grant
  • 1997-10-17 HU HU0000452A patent/HUP0000452A3/hu unknown
  • 1997-10-17 EP EP97945872A patent/EP0960180B1/en not_active Expired - Lifetime

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