CN101341237A - Traction fluid composition - Google Patents
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- CN101341237A CN101341237A CNA2006800364001A CN200680036400A CN101341237A CN 101341237 A CN101341237 A CN 101341237A CN A2006800364001 A CNA2006800364001 A CN A2006800364001A CN 200680036400 A CN200680036400 A CN 200680036400A CN 101341237 A CN101341237 A CN 101341237A
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Abstract
The present invention utilizes simple dimethylsilicone fluids of the proper viscosity/molecular weight distribution to modify the low temperature properties of cycloaliphatic hydrocarbon fluids. Addition of the dimethylsilicone fluid to cycloaliphatic fluids improves their low temperature performance without degrading the requisite elastohydrodynamic shear strength properties. Low viscosity dimethylsilicone lubricating fluids combined with cycloaliphatic hydrocarbon fluids are suitable for use in infinitely variable transmissions and other traction-drive transmission providing good low temperature flow properties and high elastohydrodynamic shear strength.
Description
The related application cross-searching
The application's case requires the U.S. Provisional Application case 60/705 of application on August 4th, 2005,353, U.S. Provisional Application case 60/709 with application on August 16th, 2005,671, U.S. Provisional Application case 60/791 with application on April 13rd, 2006,852 right of priority, the full content of all three provisional application cases intactly is attached to herein by reference.
Affiliated field
The invention belongs to low viscosity dimethyl silicone oil field, this oil is applicable to buncher oil, and this buncher oil can provide good low-temperature fluidity of equilibrated and high elasticity of fluid power (EHD) shearing resistance.
Background of invention
Buncher (traction drive) oil has similar effect to standard (gear) speed change (being automatic transmission) oil, and it must serve as lubricant, refrigerant, and in some situation as hydraulic efficiency oil.The adjection of traction or buncher (IVT) oil is that moment of torsion is delivered to output equipment from input unit by composite lubricating film, and the point of contact of lubricant film between slick rolling-transmission slip rotary components forms.So this oil require demonstrates high shear strength under the shearing force EHD of the contact area between rolling-slip driven unit condition, and the film that contact area forms by IVT oil separates and is lubricated.This oil act as oil compositions in anti-shearing (shearing resistance) of point of contact torque-transfer capability is provided.
The lubricating oil that is applicable to the buncher that the most of equipment of outdoor application adopt need be reached crucial balance between good low-temperature fluidity and high EHD shearing resistance; Especially the shearing resistance under the combination of high temperature and LCS.Cycloalphatic hydrocarbon generally has preferable shear strength characteristics, but its cold property is very weak compared with the alkyl oil of good lubricant is made in common being used to.Can merge to come in by the oil that other cold propertys are good,, still in general can cause showing of shear strength characteristics to be lost like this to improve the cold property of mixture.Have been found that simple low viscosity dimethyl silicone oil just can make these characteristics reach more satisfactory balance.
A basis of above-mentioned this theory, promptly the cold property with silicone oil raising ring grease oil is not just well known.There have been many report introductions to be used for this purpose, especially for multiple aliphatic series, cyclic aliphatic and the aromatic silicone oil of containing of traction.But, also do not have to find to have to quote the report of simple dimethyl silicone oil as the low temperature modifying agent.The hydrocarbon solvability that reason may be most of dimethyl silicone oils generally a little less than, thereby the restriction that causes it to use.Therefore, the main energy of other inventors concentrates on the silicone oil that contains other functional groups except that methyl, to avoid tangible incompatibility problem as far as possible.Or the recurrence old law, in the traction prescription, add the third component oil, such as aromatic hydrocarbon in the mixture or ester, solve the compatibility issue of dimethyl silicone oil in hydrocarbon ils.
These traction are made up of as base oil in conjunction with dimethyl silicone oil cycloalphatic hydrocarbon substantially, can form the automatic transmission fluid that is used for buncher oil of full formula to wherein adding extra additive.These additives comprise additives such as antioxidant, extreme pressure compound, extreme pressure agent, sanitising agent, dispersion agent, antifoams, rust-preventive agent, friction improver and viscosity modifier.The silicone oil that is used for this purpose of the present invention substantially also can be by other the suitable functional groups, longer chain aliphatic groups, cyclic aliphatic base or the aromatic base that are less than 10% except that methyl, or the constituting of these functional groups except that methyl, with further raising performance and full performance of mixing traction drive or buncher oil.
Prior art
Buncher generally need be reached crucial balance between good low-temperature fluidity and high EHD shearing resistance, especially under the combination condition of high temperature and LCS.Cycloalphatic hydrocarbon generally has preferable shear strength characteristics, but cold property is very weak.Can merge to come in by the oil that other cold propertys are good,, still in general can cause showing of shear strength characteristics to be lost like this to improve the cold property of mixture.
Most of traditional dimethyl silicone oil moietys demonstrate more weak hydrocarbon solubility, thereby cause the restriction used.So, these traditional dimethyl silicone oils will with share except that other functional groups all or the most of methyl, to avoid incompatibility problem.
The mixed aliphatic series, cyclic aliphatic and the aromatic series that contain silicone oil have been used for traction; But before the present invention, simple dimethyl silicone oil also is not used in the application of variator as the low-temperature fluidity modifying agent.In No. 4449415 patents of the U.S. that is published in May, 1984, illustrate that the drag coefficient of common siloxanes is low excessively as Groenhof, can not be used for traction drive equipment, this document is incorporated this paper into the form of reference.In addition the Groenhof document description silicone oil and the cycloalphatic hydrocarbon of 30-70 weight percent or the use of cycloalphatic hydrocarbon mixture of trimethylammonium silica end-blocks of relevant 30-100 weight percent.No. 4577523 patents of the U.S. of the Groenhof that on March 25th, 1986 delivered point out that the polysiloxane traction is applicable under the cold condition, and this document is incorporated this paper into the form of reference.No. 6623399 patents of the U.S. that No. 6602830 patents of the U.S. that people such as Fey deliver in August, 2003 and on September 23rd, 2003 deliver, the use of the mixture of organic oil and silicone composition has been described, the very thickness because organic oil can become under cold condition, these two parts of documents are incorporated this paper into the form of reference.
Following reference has been reported and has been added the third oil, for example contains aromatic hydrocarbon or ester in the mixture, to dissolve the relevant details of the dimethyl silicone oil in the hydrocarbon ils: No. 4190546 patents of the U.S. that people such as Kulik delivered on February 26th, 1980.This third oil has utilized naphthenic hydrocarbon, and (cycloalphatic hydrocarbon) or its mixture add solubility promoter and silicone oil, wherein needs solubility promoter to dissolve each other fully to guarantee silicone oil and naphthenic oil.
Naphthene base crude oil through highly hydrogenated processing has suitable low temperature viscosity and can be said to be higher EHD shear strength characteristics, and cost is relatively low.These features make this class oil become suitable candidate's hydrocarbon ils for traction drive and the use of buncher oil.Though these oil have flowability under utmost point low temperature, they have a shortcoming, promptly its viscosity under low temperature more than common refining from alkyl innage oil and that more aliphatic structure or component molecule are arranged.So the naphthene base crude oil through highly hydrogenated processing preferably carries out the low temperature viscosity improvement, allow viscosity reach a level that is suitable for the traction drive oil of outdoor equipment application.People have carried out many trials, comprise the use of ester, aromatics and silicone resin.Be generally used for the silicone resin relative complex of this purpose, have multiple alkyl and aromatic base functional group and branched structure.
Except that base oil, the allotment of these traction drive oil and common transmission oil are closely similar, all utilize additives such as antioxidant, extreme pressure compound, extreme pressure agent, sanitising agent, dispersion agent, antifoams, rust-preventive agent, friction improver and viscosity modifier.Additive-package is not limited to the additive of these particular types, does not also need to include all above-mentioned additives.The characteristic that also can add a small amount of basic raw material fine setting desired properties feature or oil, but this is not essential.
In addition, the silicone oil that is used for this purpose of the present invention also can contain nearly 10% but do not contain 10% other suitable functional groups, longer chain aliphatic groups, cyclic aliphatic base or aromatic base except that methyl, or these functional groups' combination, with further raising performance and full performance of mixing traction drive or buncher oil.
Summary of the invention
Utilization of the present invention has the simple dimethyl silicone oil of proper viscosity/molecular weight distribution, and it is added to improve the cold property of cycloalphatic hydrocarbon.Add dimethyl silicone oil to cycloalphatic hydrocarbon and improved its cold property, but can not damage essential EHD shear strength characteristics.
Have simple dimethyl silicone oil that suitable viscosity/molecular weight distributes and brought into play well and showing the effect that improves the ring grease hydrocarbon ils cold property that comprises naphthene base crude oil, and can not damage required EHD shearing resistance (traction) characteristic.The preferred viscosity ranges of dimethyl silicone oil in the time of 77 °F greatly about (or at 100 ℃ time greatly between the 2-30 centistoke) between＞5 to＜50 centistokes.Find that more full-bodied dimethyl silicone oil (50 centistokes or higher in the time of 77) is applicable to this series lubricant agent because its (20 ℃ or 0 and following) miscible degree is undesirable at low temperatures.
In addition, the low temperature viscosity amount of product obtains substantial improvement by a spot of low viscosity dimethyl silicone oil, and can not reduce the EHD shearing resistance (drag coefficient) of mixing oil.
Present technique can with originally 100 ℃ the time viscosity be the full formula buncher oil of 3.5-6.0 centistoke when being allocated as-20 ℃ brookfield viscosity be 100 pools or lower.Brookfield viscosity is approximately the buncher oil of 20 pools in the time of-20 ℃, if make according to this blending means, can not damage the EHD shear strength characteristics.
The preferred viscosity ranges of dimethyl silicone oil less than 20 centistokes, is more preferably about 5-15 centistoke in the time of 77 °F, (or 100 ℃ time about 2-20 centistoke).More the dimethyl silicone oil of high viscosity (77 time 20 centistokes or higher) can not be under required-20 ℃ or lower low temperature complete miscibility, and be not suitable for improving the cycloalphatic hydrocarbon that the present invention uses.
Suitably select the viscosity grade/molecular weight distribution of dimethyl silicone oil, obtain a kind of under-30 ℃ and following low temperature stable oil.Advantageously, the low temperature viscosity amount of mix products can obtain substantial improvements by light diformazan base oil co-blended is gone into cyclic hydrocarbon oil, and can not reduce the EHD shearing resistance of mixing oil.
Adopt this prescription can make when the about 3.5 full formula buncher traction to about 6.0 centistokes are caused-30 ℃ when having 100 ℃ by allotment that brookfield viscosity is low and reach 40 pools, and can not damage the EHD shear strength characteristics of oil.The EHD shear strength characteristics that contains 10 weight percents naphthene base crude oil of the dimethyl silicone oil of 10 centistokes in the time of 77 nearly is without any the fact that weakens, illustrate if having the cycloalkyl raw material, even if more the dimethyl silicone oil of volume also can be used for further improving cold property, and do not lose the EHD shearing resistance of products therefrom with oil.
These traction contain cycloalphatic hydrocarbon, and for example naphthene base crude oil in conjunction with dimethyl silicone oil, plays base oil, can form the automatic transmission fluid that is used for buncher oil of allotment fully to wherein adding other additive.These oil comprise that the allotment of base oil and common transmission oil are closely similar, all utilize additives such as antioxidant, extreme pressure compound, extreme pressure agent, sanitising agent, dispersion agent, antifoams, rust-preventive agent, friction improver and viscosity modifier.Additive-package is not limited to the additive of these particular types, does not also need to include all above-mentioned additives.The feature that also can add a small amount of basic raw material fine setting desired properties feature or oil, but this is not essential.
In addition, the silicone oil that is used for this purpose of the present invention can contain except that methyl and be less than 10% other suitable functional groups, longer chain aliphatic groups, cyclic aliphatic base or aromatic base, or these functional groups' combination, with further raising performance and full performance of mixing traction drive or buncher oil.
Other targets of the present invention, feature and advantage are passed through detailed description hereinafter, are aided with the accompanying drawing that shows the preferred embodiment of the present invention, will be conspicuous.
Brief description of drawings
Detailed description with reference to hereinafter is aided with accompanying drawing, and numeral identical among the figure can better be understood the present invention in the identical part of several view middle fingers.
Fig. 1 is a characteristic and performance data table, shows the influence of Simethicone to the cold property of cycloalkyl lubricant formulations.
Embodiment
The invention relates to traction drive oil, oil uses with at least two relatively turnable assemblies, and assembly is each other in the moment of torsion transitive relation, and oil is arranged on the assembly traction surface, and described traction comprises ring grease hydrocarbon ils and dimethyl silicone oil.
The invention provides a kind of traction basic material, raw material has good survey viscosity (low viscosity), is typically dimethyl silicone oil and high EHD shear strength characteristics under the low temperature, is typically cycloalphatic hydrocarbon.Additive provides required characteristic, with allotment traction drive oil or buncher oil, compared with the oil of traditional same media, embodies the thermal conduction capability of high heat conductance and improved.In the present invention, be its viscosity, frictional force and antioxidant characteristics at the target of oily medium, in up-to-date traction drive and buncher, to play a role.
This component of oil base
Utilization of the present invention all demonstrates the ring grease hydrocarbon ils of high EHD shear strength characteristics under many kinds of conditions; But, the non-constant of its cold property.Ring grease oil is used for traction and the buncher oil require improves to a certain extent, or even is showing and improve liquidity, change under its low temperature viscosity to acceptable scope.
Utilization of the present invention has the simple dimethyl silicone oil of proper viscosity/molecular weight distribution, and it is added to improve the cold property of cycloalphatic hydrocarbon.Add dimethyl silicone oil to cycloalphatic hydrocarbon and improve cold property, can not damage essential EHD shear strength characteristics.
When being 77 °F, the preferred viscosity ranges of dimethyl silicone oil, is more preferably about 5-15 centistoke (or 100 ℃ time about 2-10 centistoke) less than 20 centistokes (centistokes).Viscosity higher (77 time 20 centistokes or higher), dimethyl silicone oil can not complete miscibilities under-20 ℃ of regulation and lower low temperature, and are not suitable for and improve the cycloalphatic hydrocarbon that is used for traction of the present invention.The low temperature viscosity of product can be improved basically by the limited blend of low viscosity dimethyl silicone oil is incorporated in the cyclic hydrocarbon oil, can not reduce the EHD shearing resistance of mixing oil simultaneously.
Adopt this prescription can make when having 100 ℃ the buncher traction of the full formula of about 6.0 centistokes of about 3.5-be deployed into that-30 ℃ of brookfield viscosities are low to reach 40 pools, and can not damage the EHD shear strength characteristics of oil.
These traction contain cycloalphatic hydrocarbon in conjunction with dimethyl silicone oil, as base oil, can form the automatic transmission fluid that is used for buncher oil of full formula to wherein adding the additive that replenishes.These additives comprise additives such as antioxidant, extreme pressure compound, extreme pressure agent, sanitising agent, dispersion agent, antifoams, rust-preventive agent, friction improver and viscosity modifier.
Used silicone oil also can contain nearly other functional groups of 10 weight percents except that methyl, with the performance of the complete blended buncher of further raising oil.
Following example is that the prescription of buncher base oil composite provides support.It is SANTOTRAC 50 that traction oil base moiety of the present invention is used for the contrast or the standard of comparison, because of its high shear strength characteristic and in industry with for referencial use with oil.
The dispersion agent that uses in the lubricant industry
Used dispersion agent generally is used for disperseing " the cold drift " that form in gasoline and the diesel engine in the lubricant industry, can be " ashless dispersant ", or contain atoms metal.It can be used for the present invention, is good dispersion agents because it is found that them.Also need dispersion agent to disperse wearing and tearing residue and products of lubricant degradation in the speed-change process.
The ashless dispersant that is generally used for automotive industry contains lipophilic hydrocarbon and polar functional lipophilic group.Polar functional group can be carboxylicesters, ester, amine, imines, hydroxyl, ether, epoxide, phosphorus, ester carboxyl, acid anhydride or nitrile.In the lipophilic functional group can be oligomerization or poly, 70-200 carbon atom arranged usually, with guarantee oil solubility.With different agent treated hydrocarbon polymers, introduce polar group, hydrocarbon polymer comprises that by handling the product that polyolefine prepares for example polyisobutene is at first with maleic anhydride or phosphoric sulfide or phosphorus chloride processing, or, use agent treated such as polyamine, amine, oxyethane then through thermal treatment.
In the middle of these ashless dispersants, what generally be used for petroleum industry comprises N-substituting group polyisobutenyl succinimide, alkyl methacrylate-vinylpyrrolidone copolymer, alkyl methacrylate-methacrylic acid dialkylamine ethyl ester multipolymer, alkyl methacrylate-methacrylic acid glycol ester multipolymer and poly-stearylamide.Should with in most important preferred oil-based dispersants comprise other dispersion agent of chemical grade: alkyl succinimide, succinate, high molecular weight amines, Mannich alkali and phosphoric acid derivatives.Some particular example is polyisobutenyl succinimide-polyethylenepolyamine, poly-isobutenyl succinate, polyisobutene acrinyl-polyethylenepolyamine, two-hydroxypropyl phosphorylation thing.The commercial dispersants that is applicable to transmission oil is, for example, and Lubrizol 890 (ashless PIB succinate), Lubrizol6420 (high molecular PIB succinate), ETHYLHITEC 646 (non-boronation PIB succinate).Dispersion agent can be used for the additive of lubricant industry in conjunction with other, forms the dispersion agent-detergent additive bag for the transmission oil use, LUBRIZOL9677MX for example, and whole dispersion agent-detergent package can be used as dispersion agent.
The other types dispersion agent
Can be used for other dispersion agent of the present invention and can be the to have low HLB value tensio-active agent or the surfactant mixtures of (be generally less than or equal 8), be preferably non-ionic tensio-active agent, or the mixture of nonionogenic tenside and ionic surface active agent.
Selected dispersion agent should be dissolved in or be scattered in the liquid medium.The amount of dispersion agent should be arranged in following scope: 0.01-30%, preferred 0.5-20%, more preferably 1-15%, most preferably 2-13%.
Other compounds
This dispersion agent can also contain one or more a large amount of other compounds, and polymkeric substance preferably is not to be to disperse with helping, but in order to reach thickening or other oily features that needs.Can add these compounds, but reduce the amount of particulate, used particulate can not allow viscosity become excessive.
The viscous modifier that is used for lubricant industry can be used for oily medium of the present invention, and modifying agent comprises olefin copolymer (OCP), polymethacrylate (PMA), hydrogenated styrene diene (STD) and vinylbenzene-polyester (STPE) polymkeric substance.Olefin copolymer is the material of rubber-like, makes by the Ziegler-Natta catalysis method based on vanadium with ethene and propylene mixtures.The vinylbenzene diene polymer is to make by the anionic polymerisation of vinylbenzene and divinyl or isoprene.Polymethacrylate is to make by the Raolical polymerizable of alkyl methacrylate.Vinylbenzene-polyester polymers is by first copolymerization of styrene and maleic anhydride, makes with alcohols mixture esterification intermediate product then
Other compounds that can be used for the present invention's oil medium comprise: acrylate copolymer, for example polyacrylic acid and sodium polyacrylate, the high-molecular weight polymer of oxyethane, the Polyox WSR that produces of Union Carbide for example, cellulosic cpd, carboxymethyl cellulose for example, polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), xanthan gum and guar gum, poly-saccharides, alkanolamide, the amine salt of polymeric amide, the King Industries DISPARLONAQ series of producing for example, hydrophobicity upgrading oxyethane urea alkane (for example ACRYSOL series of Rohmax production), silicon ester and weighting agent are as mica, tripoli, Mierocrystalline cellulose, wood powder, clay (comprising organic clay), and resinous polymer, for example polyvinylbutyral resin, polyureas alkane resin, acrylic resin and Resins, epoxy.
For example the compound of oil sealing swelling agent or softening agent also can be used for the present invention; it can be selected from following thing: phthalic ester; adipic acid ester; sebate; more specifically from following thing, select: nitrilotriacetic base stearin; epoxidised soybean oil; epoxidized linseed; N; the n-butylbenzene sulphonamide; the aliphatic series polyurethane; epoxidized soybean oil; the pentanedioic acid polyester; triethylene glycol caprate/octanoate; long-chain alkane ether; pentanedioic acid dioxane diester; single polymers; polymer and epoxy plasticizer; polyester based on hexanodioic acid; hydrogenated dimer acids; the distillation dimeracid; poly lipid acid trimer; the ethyl ester of hydrolytic collagen matter; Unimac 5680 and sorb oleic acid ester and cocoyl hydrolysis of keratin; the PPG-12/PEG-65 lanolin oil; the hexanodioic acid dialkyl; phosphoric acid alkane aromatic ester; phosphoric acid alkane diaryl; the upgrading tri aromatic ester of phosphic acid; tri aromatic ester of phosphic acid; butyl benzyl phthalate; octyl benzyl phthalate; phthalic acid octane ester; ethoxyethyl group hexanodioic acid two fourth oxygen esters; phosphoric acid 2-second hexyl diphenyl ester; dibutoxy ethoxyethyl group formyloxy; Wickenol 116; Wickenol 117; Isodecyl oleate; two capric acid neo-pentyl glycol esters; two sad neo-pentyl glycol esters; PIVALIC ACID CRUDE (25) dissident's ester; ethoxylation lanolin; the polyoxyethylene cholesterol; propoxylation (2 molecule) Wool wax alcohol; the propoxylation Wool wax alcohol; the ethanoyl propoxy-ethene derivatives of lanolin, and dimethyl polysiloxane.Other softening agent that can replace above-mentioned softening agent and/or use together comprise glycerine, polyoxyethylene glycol, dibutyl phthalate and 2,2,4-trimethylammonium-1, and 3-pentanediol mono isobutyrate, and diisononyl phthalate, all are dissolved in solvent carrier.Also can use for example Lubrizol 730 of other oil sealing swelling agents.
Antioxidant is the important component part of transmission oil.The antioxidant of common species comprises zinc dialkyl dithiophosphate, alkyl and perfume compound phenol, alkyl and perfume compound amine, and olefine sulfide.Commercial examples is CIBAL57 (phenyl amine) and ETHYLHITEC 1656.
Pour point reducer is the low temperature brookfield viscosity that polymethylmethacrylate type or ethylene, propylene olefin copolymer type all can be used for reducing oil.Example comprises ROHMAX 3008, ROHMAX 1-333, LUBRIZOL6662A.
Friction improver is used to control the frictional force and the torque characteristic of oil.Commercial examples comprises LUBRIZOL 8650 and HITEC 3191.
Example
Following case description preferred implementation of the present invention.Other belong to embodiment in claims spirit scope in the field the technician, if considered specification sheets described in perhaps actually operating, will be conspicuous.Description and example all only play example, do not exceed the example hereinafter category and the spirit of claims.Unless all per-cents that relate in the example are pointed out separately, all are meant weight percent.
Basic contrast
Weight percentages of components
Naphthene base crude oil 100SUS 90.80
Dimethyl silicone oil, 10cST@77 °F-----
Performance additive packages 5.00
Viscosity modifier 4.00
Antifoaming additive 0.20
Measuring unit
KV?40C，cST 29.20
KV?100C，cST 5.05
The CCS dynamic viscosity, cP
-20C 2716
-30C 11220
MTM drag coefficient 0.066
(steel sample, 90C, 1.25GPA, 4 meter per seconds, 4% revolutional slip)
Example 1
Weight percentages of components
Naphthene base crude oil 100SUS 88.30
Dimethyl silicone oil, 10cST@77 °F 2.50
Performance additive packages 5.00
Viscosity modifier 4.00
Antifoaming additive 0.20
Measuring unit
KV?40C，cST 28.00
KV?100C，cST 5.01
The CCS dynamic viscosity, cP
-20C 2170
-30C 8242
MTM drag coefficient 0.066
(steel sample, 90C, 1.25GPA, 4 meter per seconds, 4% revolutional slip)
Example 2
Weight percentages of components
Naphthene base crude oil 100SUS 85.80
Dimethyl silicone oil, 10 cST@77 °F 5.00
Performance additive packages 5.00
Viscosity modifier 4.00
Antifoaming additive 0.20
Measuring unit
KV?40C，cST 26.75
KV?100C，cST 4.98
The CCS dynamic viscosity, cP
-20C 1770
-30C 6731
MTM drag coefficient 0.066
(steel sample, 90C, 1.25GPA, 4 meter per seconds, 4% revolutional slip)
Example 3
Weight percentages of components
Naphthene base crude oil 100 SUS 83.30
Dimethyl silicone oil, 10 cST@77 °F 7.50
Performance additive packages 5.00
Viscosity modifier 4.00
Antifoaming additive 0.20
Measuring unit
KV?40C，cST 25.61
KV?100C，cST 4.95
The CCS dynamic viscosity, cP
-20C 2170
-30C 8242
MTM drag coefficient 0.066
(steel sample, 90C, 1.25GPA, 4 meter per seconds, 4% revolutional slip)
Example 4
Weight percentages of components
Naphthene base crude oil 100SUS 80.80
Dimethyl silicone oil, 10cST@77 °F 10.00
Performance additive packages 5.00
Viscosity modifier 4.00
Antifoaming additive 0.20
Measuring unit
KV?40C，cST 24.61
KV?100C，cST 4.92
The CCS dynamic viscosity, cP
-20C 1239
-30C 4295
MTM drag coefficient 0.066
(steel sample, 90C, 1.25GPA, 4 meter per seconds, 4% revolutional slip)
It mainly is in order to be expressly understood the present invention that above-mentioned details is provided, do not really want it is limited in the described scope, after those skilled in the art read disclosure, under the prerequisite that does not deviate from spirit of the present invention and appended claims book, can make conspicuous variation.Therefore can not limit the invention in the specific implementations category that this paper stated.On the contrary, the content that contain is all in the spirit and category of appended claims book.
Claims (8)
1. a traction is used for traction drive system, and this system has at least two relatively turnable assemblies, each other in the moment of torsion transitive relation, and have described traction, be arranged on the traction surface of described assembly, improvement comprises adopts described traction, and this oil comprises substantially:
Cycloalphatic hydrocarbon; With
Viscosity is less than the dimethyl silicone oil of 50 centistokes in the time of 77 °F.
2. a traction drive system is made of at least two relatively turnable assemblies and traction substantially, and inter-module is each other in the moment of torsion transitive relation, and traction is arranged on the traction surface of described assembly, and described traction comprises:
Cycloalphatic hydrocarbon; With
Viscosity is less than the dimethyl silicone oil of 20 centistokes in the time of 77 °F.
3. a traction is used for traction drive system, and this system has at least two relatively turnable assemblies, each other in the moment of torsion transitive relation, and have described traction, be arranged on the traction surface of described assembly, improvement comprises adopts described traction, and this oil comprises substantially:
Cycloalphatic hydrocarbon; With
Viscosity is less than the dimethyl silicone oil of 20 centistokes in the time of 77 °F, when preferred viscosity is 77 °F in the 5-15 centistoke scope, or 100 ℃ the time in the 2-10 centistoke scope.
4. as the traction of traction drive system arbitrary among the claim 1-3, wherein said cycloalphatic hydrocarbon is a naphthene base crude oil.
5. a traction drive system is made of at least two relatively turnable assemblies and traction substantially, and inter-module is each other in the moment of torsion transitive relation, and traction is arranged on the traction surface of described assembly, and described traction comprises:
Cycloalphatic hydrocarbon; With
The dimethyl silicone oil of viscosity 5-15 centistoke in the time of 77.
6. the traction of traction drive system as claimed in claim 5, wherein said cycloalphatic hydrocarbon is a naphthene base crude oil.
7. the traction of traction drive system as claimed in claim 5, wherein said dimethyl silicone oil also can contain nearly 10% other alkyl or residual group except that methyl.
8. as the traction of traction drive system arbitrary among the claim 1-7, wherein said oil comprises dispersion agent.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70535305P | 2005-08-04 | 2005-08-04 | |
| US60/705,353 | 2005-08-04 | ||
| US60/709,671 | 2005-08-22 | ||
| US60/791,852 | 2006-04-13 |
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| CN201410336215.0A Division CN104263454A (en) | 2005-08-04 | 2006-08-04 | Traction fluid composition |
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| CNA2006800364001A Pending CN101341237A (en) | 2005-08-04 | 2006-08-04 | Traction fluid composition |
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| CN111918954A (en) * | 2018-03-06 | 2020-11-10 | 胜牌许可和知识产权有限公司 | Traction fluid composition |
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| US8410032B1 (en) * | 2012-07-09 | 2013-04-02 | Afton Chemical Corporation | Multi-vehicle automatic transmission fluid |
| WO2015053781A1 (en) * | 2013-10-11 | 2015-04-16 | Santolubes Incorporation | High elastohydrodynamic shear strength fluid compositions |
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|---|---|---|---|---|
| CN111918954A (en) * | 2018-03-06 | 2020-11-10 | 胜牌许可和知识产权有限公司 | Traction fluid composition |
| CN111918954B (en) * | 2018-03-06 | 2022-11-04 | 胜牌许可和知识产权有限公司 | Traction fluid composition |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101321842B (en) | 2015-11-25 |
| CN101321842A (en) | 2008-12-10 |
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Application publication date: 20090107 |