CN107868692A

CN107868692A - Lubricating oil for non-stage transmission composition

Info

Publication number: CN107868692A
Application number: CN201710728115.6A
Authority: CN
Inventors: 小松原仁; 松木伸悟; 中村俊贵; 知念启之; 松井雄治
Original assignee: Jxtg Energy Corp
Current assignee: Jxtg Energy Corp; Eneos Corp
Priority date: 2016-09-27
Filing date: 2017-08-23
Publication date: 2018-04-03
Also published as: JP2018053017A; JP6718349B2; US20180087002A1

Abstract

Present invention offer is a kind of to be met buncher oil required sintering resistance, wear resistance and fatigue life and improves the lubricating oil for non-stage transmission composition of coefficient of friction between section combustion property and metal.The lubricating oil for non-stage transmission composition contains：(A) lube base oil；(B) using lubricant oil composite total amount as benchmark, the boric acid ester compound more than 25 mass ppm below 500 mass ppm is calculated as with boron amount；(C) using lubricant oil composite total amount as benchmark, the phosphoric acid more than 100 mass ppm below 750 mass ppm is calculated as with phosphorus amount；Poly- (methyl) acrylate of (D) weight average molecular weight 100, less than 000, kinematic viscosity of the lubricant oil composite at 40 DEG C are 25mm²/ below s.

Description

Lubricating oil for non-stage transmission composition

Technical field

The present invention relates to lubricating oil for non-stage transmission composition, more specifically, is related to the metal for being suitable for automobile using The lubricant oil composite of variable v-belt drive.

Background technology

In recent years, the various mechanical requirements energy-savings such as automobile, building machinery, agricultural machinery, i.e. demand section burning, engine Energy-saving is need facilitate with devices such as speed changers.

As one of energy-saving means in speed changer, the lowering viscousity of lubricating oil can be enumerated.It is considered that by making Lubricating oil lowering viscousity, resistance and drag torque are stirred caused by the viscous drag of lubricating oil to be reduced, the transmission efficiency of power Improve, as a result can realize the raising of section combustion property.

As another energy-saving means in speed changer, the small, light of speed changer can be enumerated.Pass through speed changer Small, light, being equipped with the specific fuel consumption of the vehicle of speed changer is improved.Especially for buncher (such as Metal band type stepless speed variator etc.) for, if it is possible to improve coefficient of friction between metal, it becomes possible to realize the small-sized of speed changer Change, therefore, it is intended that lubricating oil used in buncher has the characteristic that coefficient of friction between metal is maintained to higher level.

Prior art literature

Patent document

Patent document 1：Japanese Unexamined Patent Publication 2014-196396 publications

Patent document 2：No. 4663843 publications of Japanese Patent No.

The content of the invention

Invent problem to be solved

When making lubricating oil lowering viscousity, oil film thickness reduces on lubrication face.From the viewpoint of coefficient of friction between raising metal From the point of view of, it is believed that the reduction of oil film thickness is favourable in mixed lubrication region.But once oil film thickness subtracts on lubrication face It is small, there will be sintering resistance and wear resistance declines and the tendency of fatigue life shortening.

The problem of the present invention is that providing one kind disclosure satisfy that the required sintering resistance of buncher oil, wear resistance And fatigue life and the lubricating oil for non-stage transmission composition for improving coefficient of friction between section combustion property and metal.

For solving the method for problem

An embodiment of the invention is a kind of lubricating oil for non-stage transmission composition, and it contains (A) lubrication oil base Plinth oil；(B) using lubricant oil composite total amount as benchmark, more than 25 mass ppm 500 matter are calculated as with boron amount (boron atom conversion amount) Measure below ppm boric acid ester compound；(C) using lubricant oil composite total amount as benchmark, in terms of phosphorus amount (phosphorus atoms conversion amount) For the phosphoric acid below the mass ppm of more than 100 mass ppm 750；Poly- (methyl) propylene of (D) weight average molecular weight below 100,000 Acid esters, kinematic viscosity of the lubricant oil composite at 40 DEG C are 25mm²/ below s.

In this manual, " (methyl) acrylate " refers to " acrylate and/or methacrylate ".

It is preferred that above-mentioned lubricating oil for non-stage transmission composition also contains (E) using lubricant oil composite total amount as benchmark, More than 180 mass the ppm thiadiazole compound below 900 mass ppm, lubricating oil compositions are calculated as with sulfur content (sulphur atom conversion amount) Boron contents B (the units of above-mentioned (B) composition are come from thing：Quality ppm) with lubricant oil composite in phosphorus content P (units：Quality Ppm) sum is relative to the sulfur content S (units that above-mentioned (E) composition is come from lubricant oil composite：Quality ppm) ratio (B+ P)/S is less than more than 13.

In above-mentioned lubricating oil for non-stage transmission composition, preferably above-mentioned (A) lube base oil contains (A) lubricating oil Base oil contains base oil (A1), and with or without base oil (A2), motion when above-mentioned base oil (A1) is 100 DEG C is glued Spend for 2.8mm²/ below s, viscosity index (VI) are more than 110, %C_PFor more than 90 base oil, using lube base oil total amount as Benchmark, the content of above-mentioned base oil (A1) is below the mass % of more than 30 mass % 100, when above-mentioned base oil (A2) is 100 DEG C Kinematic viscosity be 3mm²/ more than s 10mm²/ below s, API Group III base oils, IV classes base oil or their mixed base Oil, when containing base oil (A2), using lube base oil total amount as benchmark, the content of above-mentioned base oil (A2) is 70 matter Below % is measured, using lube base oil total amount as benchmark, the content of the base oil in addition to base oil (A1) and (A2) is 0~ 4 mass %, kinematic viscosity of above-mentioned (A) lube base oil at 100 DEG C are 3.4mm²/ below s.

In above-mentioned lubricating oil for non-stage transmission composition, preferably above-mentioned (B) composition is 1 shown in following formulas (1) The boric acid ester compound of the kind above.

(in formula (1), R¹For the alkyl of carbon number 1~30, R²And R³It is separately hydrogen atom or carbon number 1 ~30 alkyl.)

The effect of invention

Meet buncher oil required sintering resistance, wear resistance and tired longevity in accordance with the invention it is possible to provide Order and the lubricating oil for non-stage transmission composition of coefficient of friction between section combustion property and metal can be improved.

Embodiment

Hereinafter, the present invention is described in detail.Wherein, unless otherwise specified, for numerical value A and B " A~B " Statement refer to " more than A below B ".In the case that only numerical value B carries unit in the statement, the unit is also applied for numerical value A.Separately The term of outer "or" and "or" refers to logic or (Logical disjunction) in case of no particular description.

＜ (A) lube base oils ＞

Lubricating oil for non-stage transmission composition (hereinafter sometimes referred to " buncher oil " or " lubricating oil of the present invention Composition ") in, as lube base oil, without limitation using selected from mineral oil system base oil and synthesis system basis More than a kind of base oil in oil.

As mineral oil system base oil, specifically, can illustrate：As to normal pressure obtained from by crude oil atmospheric distillation Residual oil is evaporated under reduced pressure to obtain lube cut, and desolventizing, solvent extraction, hydrogenolysis, hydrogen isomerization, solvent are carried out to the cut Alkane (paraffin) system or the cycloalkanes hydrocarbon systems obtained from more than a kind of refinement treatment such as dewaxing, contact dewaxing, hydrofining Base oil and paraffin isomerization mineral oil, by by base oil etc. made from the gimmick of GTL WAX (gas-liquid wax) isomerization.

As mineral oil system base oil, using hydrogenolysis mineral oil system's base oil, and/or petroleum wax preferably can will be contained Or paraffin isomerization isoparaffin system obtained from more than the mass % of GTL waxes (such as Fischer-Tropsch synthesis oil etc.) 50 starting isomeric Base oil.

It is base oil as synthesis, for example, poly-alpha-olefin (such as ethylene-propylene copolymer, poly- fourth can be illustrated Alkene, 1- octene oligomers, 1- decylene oligomers etc.) or its hydride；Monoesters (such as butyl stearate, octyl laurate Deng)；Diester (such as glutaric acid-two-tridecane base ester, -2- the ethylhexyls of adipic acid-two, diisodecyl adipate (DIDA), oneself Diacid-two-tridecane the base ester, -2- ethylhexyls of decanedioic acid-two etc.)；Polyester (such as trimellitate etc.)；Polyalcohol Ester (such as trimethylolpropane caprylate, trimethylolpropane pelargonate, pentaerythrite -2 ethyl hexanoic acid ester, pentaerythrite Pelargonate etc.)；Fragrant family artificial oil (such as alkylbenzene, alkylnaphthalene, aromatic ester etc.)；And their mixture etc..

The %C of mineral oil system base oil_PPreferably more than 70, more than 80 are more preferably, and usually less than 99, preferably For less than 95.By the %C for making mineral oil system base oil_PMore than above-mentioned lower limit, viscosity-temperature profile, heat can be made Oxidation stability and frictional behavior improve.Also, by the %C for making lube base oil_pBelow above-mentioned higher limit, Neng Gouti The dissolubility of high additive.

The %C of mineral oil system base oil_APreferably less than 2, it is more preferably less than 1, is more preferably less than 0.8, special You Xuanwei less than 0.5.By the %C for making mineral oil system base oil_ABelow above-mentioned higher limit, it is possible to increase viscosity versus temperature Characteristic, thermo oxidative stability and section combustion property.

The %C of mineral oil system base oil_NPreferably less than 30, be more preferably less than 25, and preferably more than 1, it is more excellent Elect more than 4 as.By the %C for making mineral oil system base oil_NBelow above-mentioned higher limit, it is possible to increase viscosity-temperature profile, Thermo oxidative stability and frictional behavior.Also, by making %C_NMore than above-mentioned lower limit, it is possible to increase the dissolving of additive Property.

In this manual, %C_P, %C_NAnd %C_ARepresent respectively according to method (n- as defined in ASTM D 3238-85 D-M ring analyses) try to achieve, paraffinic carbon atomicity it is relative relative to the percentage of whole carbon numbers, naphthenic carbon atomicity In whole carbon numbers percentage and aromatic carbon atoms number relative to whole carbon numbers percentage.That is, above-mentioned % C_P, %C_NAnd %C_APreferable scope based on the value tried to achieve by the above method, such as even be free of cycloalkane composition mineral Oil system base oil, asked to obtain %C by the above method_N0 value may also be showed more than.

Kinematic viscosity of the lube base oil at 100 DEG C is preferably 6.0mm²/ below s, more preferably 4.5mm²/ s with Under, particularly preferably 3.4mm²/ below s, and preferably 2.0mm²/ more than s, more preferably 2.5mm²/ more than s, particularly preferably For 2.6mm²/ more than s.By making kinematic viscosity of the base oil at 100 DEG C for below above-mentioned higher limit, lubricant oil composite Low-temperature viscosity profiles become good, and can improve section combustion property.By making kinematic viscosity of the base oil at 100 DEG C be above-mentioned More than lower limit, oil film can be adequately formed in lubricant housings, improve lubricity.Wherein, in this manual, " at 100 DEG C Kinematic viscosity " kinematic viscosity when referring to 100 DEG C of ASTM D-445 defineds.

Kinematic viscosity of the lube base oil at 40 DEG C is preferably 40mm²/ below s, more preferably 30mm²/ below s, enter One step is preferably 25mm²/ below s, particularly preferably 20mm²/ below s, and preferably 8.0mm²/ more than s, it is more preferably 8.5mm²/ more than s, particularly preferably 9.0mm²/ more than s.It is above-mentioned by kinematic viscosity at make lube base oil 40 DEG C Below higher limit, the low-temperature viscosity profiles of lubricant oil composite can be made become good, and improve section combustion property.Also, pass through Make kinematic viscosity during 40 DEG C of base oil for oil film more than above-mentioned lower limit, can be adequately formed in lubricant housings, improved Lubricity.Wherein in this manual, motion when " kinematic viscosity at 40 DEG C " refers to 40 DEG C of ASTM D-445 defineds Viscosity.

The viscosity index (VI) of lube base oil is preferably more than 100.More preferably more than 110, be more preferably 115 with On.By making the viscosity index (VI) of base oil be that more than above-mentioned lower limit can not only make the viscosity versus temperature of lubricant oil composite Characteristic and thermo oxidative stability improve, additionally it is possible to improve wear resistance.Wherein, in this manual, viscosity index (VI) refers to The viscosity index (VI) measured according to JIS K2283-1993.

The pour point of lube base oil be preferably less than -10 DEG C, more preferably less than -12.5 DEG C, be more preferably - Less than 15 DEG C, particularly preferably less than -17.5 DEG C, most preferably less than -20.0 DEG C.When pour point exceedes above-mentioned higher limit, deposit In the tendency that the overall low temperature flow of lubricant oil composite declines.Wherein, in this manual, pour point refers to according to JIS The pour point that K 2269-1987 are measured.

From the viewpoint of oxidation stability, the content of the sulphur composition in lube base oil be preferably 1.5 mass % with Under, more preferably below 1.0 mass %.

As the lube base oil in the lubricant oil composite of the present invention, preferably (had below using following base oil When be referred to as " lube base oil of present embodiment ")：

Using lube base oil total amount as benchmark, during 100 DEG C of (A1) containing below the mass % of more than 30 mass % 100 Kinematic viscosity be 2.8mm²/ below s, viscosity index (VI) are more than 110, %C_PFor more than 90 base oil, also,

Using lube base oil total amount as benchmark, kinematic viscosity during 100 DEG C of (A2) containing below 70 mass % is 3mm²/ more than s 10mm²/ below s, API Group III base oils or IV classes base oil either their mixed base oil or not Containing (A2) composition,

Using lube base oil total amount as benchmark, the content of the base oil in addition to base oil (A1) and (A2) is 0~4 Quality %, kinematic viscosity at 100 DEG C is 3.4mm²/ below s.

By using the lube base oil of present embodiment as lube base oil, can reduce from fluid lubrication area Oil film thickness of the domain into the moving area (mixed lubrication region) in boundary lubrication region, and improve coefficient of friction between metal.

Kinematic viscosity of the base oil (A1) at 100 DEG C is 2.8mm²/ below s, it is preferably 2.7mm²/ below s.It is and excellent Elect 1.5mm as²/ more than s, more preferably 2.0mm²/ more than s.By making kinematic viscosity of the base oil (A1) at 100 DEG C be upper State below higher limit, it is possible to increase coefficient of friction between metal.Also, by making kinematic viscosity of the base oil (A1) at 100 DEG C More than above-mentioned lower limit, oil film can be adequately formed in lubricant housings, improves lubricity.

Kinematic viscosity of the base oil (A1) at 40 DEG C is preferably 15mm²/ below s, more preferably 10mm²/ below s, and Preferably 2.0mm²/ more than s, more preferably 5.0mm²/ more than s.By making kinematic viscosity of the base oil (A1) at 40 DEG C be upper State below higher limit, easily improve coefficient of friction between metal.Also, by making kinematic viscosity of the base oil (A1) at 40 DEG C be More than above-mentioned lower limit, oil film can be adequately formed in lubricant housings, improve lubricity.

The viscosity index (VI) of base oil (A1) is more than 110.By making the viscosity index (VI) of base oil (A1) be more than 110, hold Easily coefficient of friction between raising metal.The upper limit is not particularly limited, usually less than 150, be preferably less than 135.

The %C of base oil (A1)_PFor more than 90.By the %C for making base oil (A1)_PFor more than 90, thermo oxidative stability Become good.The upper limit is not particularly limited, usually less than 99, from the viewpoint of the dissolubility of additive, preferably 95 with Under.

The %C of base oil (A1)_APreferably less than 1, less than 0.8, particularly preferably less than 0.5 is more preferably, can also For 0.By the %C for making base oil (A1)_ABelow above-mentioned higher limit, it is possible to increase viscosity-temperature profile, thermal oxide are steady Qualitative and section combustion property.

Based on oily (A1), without limitation using the mineral oil system base oil with above-mentioned character.

Kinematic viscosity of the base oil (A2) at 100 DEG C is 3~10mm²/ s, it is preferably 8.0mm²/ below s, it is more preferably 6.0mm²/ below s, more preferably 4.5mm²/ below s.By making kinematic viscosity of the base oil (A2) at 100 DEG C be upper State below higher limit, it is possible to increase coefficient of friction between metal.Also, by making kinematic viscosity of the base oil (A2) at 100 DEG C More than above-mentioned lower limit, oil film can be adequately formed in lubricant housings, improves lubricity.

Base oil (A2) is the Group III base oil or class IV base oils or their mixed base oil of API classification, preferably For Group III base oil.Group III base oil is below the mass % of sulphur composition 0.03, more than the mass % of saturated component 90 and viscosity The mineral oil system base oil of index more than 120.IV class base oils are poly alpha olefins.

Using lube base oil total amount as benchmark, base oil (A1's) in the lube base oil of present embodiment contains Measure as more than 30 mass %, be preferably more than 35 mass %, or 100 mass %.In this manual, base oil (A1) Content refer to that lube base oil is made up of base oil (A1) as 100 mass % using lube base oil total amount as benchmark.

Using lube base oil total amount as benchmark, base oil (A2's) in the lube base oil of present embodiment contains Measure as below 70 mass %, be preferably below 65 mass %, or 0 mass %.In this manual, base oil (A2) Content is that 0 mass % refers to that lube base oil is free of base oil (A2).

Using lube base oil total amount as benchmark, in the lube base oil of present embodiment except base oil (A1) and (A2) content of the base oil beyond is below 4 mass %, preferably below 1 mass %, or 0 mass %.In this theory In bright book, the content of the base oil in addition to base oil (A1) and (A2) refers to lube base oil by base oil for 0 mass % (A1) formed with (optionally) base oil (A2).

＜ (B) boric acid ester compounds ＞

The lubricant oil composite of the present invention contains boric acid ester compound (hereinafter sometimes referred to " (B) composition ".

As (B) composition, more than a kind of boric acid ester compound shown in following formulas (1) can be used.

As alkyl, can Exemplary alkyl radicals (can have ring structure), (position of double bond is any, can have ring for alkenyl Structure), aryl, alkylaryl, alkenyl aryl, aryl alkyl, aryl alkenyl etc..

As alkyl, the various alkyl of straight or branched can be enumerated.As the alkyl with ring structure, such as can arrange Lift alkyl-cycloalkyl or cycloalkyl-alkyl etc..As cycloalkyl, such as the carbon such as cyclopenta, cyclohexyl, suberyl original can be enumerated Cycloalkyl of the subnumber below more than 57.And the position of substitution on cycloalkyl ring is arbitrary.

As alkenyl, the various alkenyls of straight or branched can be enumerated.As the alkenyl with ring structure, such as can arrange Lift alkylcycloalkenyl, alkenyl cycloalkyl, cycloalkenyl alkyl, cycloalkenylalkenyl etc..Cycloalkyl is also same as above.As cycloalkenyl group, such as Cycloalkenyl group of the carbon numbers such as cyclopentenyl, cyclohexenyl group, cycloheptenyl below more than 57 can be enumerated.And cyclenes basic ring and The position of substitution on cycloalkyl ring is arbitrary.

As aryl, such as phenyl, naphthyl etc. can be enumerated.Aryl can have hydrocarbyl substituent.Also, in above-mentioned alkane In base aryl, alkenyl aryl, aryl alkyl and aryl alkenyl, the position of substitution on aryl is arbitrary.

Alkyl of the carbon number below more than 1 30 in above-mentioned formula (1) is preferably alkyl or alkenyl, more preferably alkane Base.Above-mentioned carbon number is preferably more than 3, more preferably more than 5.And preferably less than 24, it is more preferably less than 12.Pass through Make the carbon number of alkyl to be more than above-mentioned lower limit, it is possible to increase dissolubility, improve coefficient of friction between metal.And alkyl When carbon number exceedes above-mentioned higher limit, the trend of frictional decrease between metal be present.

In above-mentioned formula (1), preferably R²And R³It is at least one be hydrogen atom, more preferably R²And R³Both are hydrogen atom.It is logical Cross (B) composition using this form, it is possible to increase film strength is lubricated in boundary lubrication region, improves sintering resistance and wear-resisting Damage property.

As preferable one of (B) composition, R in above-mentioned formula (1) can be enumerated¹For the alkyl of carbon number 3~12 Or alkenyl, R²And R³For the boric acid ester compound of hydrogen atom.

Using lubricant oil composite total amount as benchmark, the content of (B) composition in lubricant oil composite is with boron amount (boron atom Conversion amount) it is calculated as 25~500 mass ppm, is preferably below 400 mass ppm, more preferably below 300 mass ppm.By making (B) content of composition is more than above-mentioned lower limit, it is possible to increase the lubrication film strength in boundary lubrication region, improves resistance to sintering Property and wear resistance.Also, by making the content of (B) composition be below above-mentioned higher limit, it is possible to increase in boundary lubrication region Lubrication film strength, improve sintering resistance and fatigue life.

＜ (C) phosphoric acid ＞

The lubricant oil composite of the present invention contains phosphoric acid (hereinafter sometimes referred to " (C) composition ").

As (C) composition, more than a kind of the phosphorus in orthophosphoric acid, pyrophosphoric acid, condensed phosphoric acid and metaphosphoric acid can be used Acid.As (C) composition, preferably orthophosphoric acid and/or metaphosphoric acid, particularly preferred orthophosphoric acid.

Using lubricant oil composite total amount as benchmark, the content of (C) composition in lubricant oil composite is with phosphorus amount (phosphorus atoms Conversion amount) it is calculated as 100~750 mass ppm, is preferably more than 120 mass ppm, particularly preferably more than 140 mass ppm.Pass through Make the content of (C) composition to be more than above-mentioned lower limit, it is possible to increase the lubrication film strength in boundary lubrication region, improve resistance to burning Knot property and wear resistance.Also, by making the content of (C) composition be below above-mentioned higher limit, it is possible to increase boundary lubrication region In lubrication film strength, improve sintering resistance and fatigue life.

Poly- (methyl) the acrylate ＞ of ＜ (D)

It is (following that the lubricant oil composite of the present invention contains poly- (methyl) acrylate of the weight average molecular weight below 100,000 Sometimes referred to as " (D) composition ").Wherein, in this manual, " (methyl) acrylate " refers to " acrylate and/or methyl-prop Olefin(e) acid ester ".

(D) composition can be poly- (methyl) acrylate of decentralized, or poly- (methyl) propylene of non-dispersive type Acid esters.(D) weight average molecular weight of composition is 100, less than 000, is preferably 80, less than 000, is more preferably 60, less than 000, and And preferably more than 10,000, more preferably more than 15,000.By make the weight average molecular weight of (D) composition for above-mentioned higher limit with Under, it is possible to increase the shear stability of lubricant oil composite.Also, by making the weight average molecular weight of (D) composition be above-mentioned lower limit More than value, it is possible to increase the viscosity index (VI) of lubricant oil composite.

(D) composition plays a part of as viscosity index improving agent.The content of (D) composition in lubricant oil composite can be with To make the amount that kinematic viscosity of the lubricant oil composite at 40 DEG C is in aftermentioned scope.Specific content is according to (D) composition Weight average molecular weight and it is different, such as can be 5~20 matter using lubricant oil composite total amount as benchmark (100 mass %) Measure %.

＜ (E) thiadiazole compounds ＞

It is preferred that the present invention lubricant oil composite contain more than a kind thiadiazole compound (hereinafter sometimes referred to " and (E) into Point ").

As the example of (E) composition, 1,3,4- thiadiazole compounds, the Xia Shutong shown in following formulas (2) can be enumerated The 1,4,5- thiadiazole compounds shown in 1,2,4- thiadiazole compounds and following formulas (4) shown in formula (3).

(in formula (2)~(4), R⁴And R⁵Hydrogen or carbon number 1~20 can be separately represented with identical or different Alkyl；A and b with identical or different, can separately represent 0~8 integer.)

In above-mentioned thiadiazole compound, particularly preferably using it is shown in any formula of above-mentioned formula (2)~(4), have The thiadiazole compound of alkyl disulfide group.

Using lubricant oil composite total amount as benchmark, the content of (E) composition in lubricant oil composite is with sulfur content (sulphur atom Conversion amount) it is calculated as 180~900 mass ppm, is preferably 300~900 mass ppm.By making the content of (E) composition under above-mentioned More than limit value, easily improve coefficient of friction between sintering resistance, wear resistance, fatigue life and metal.Also, by make (E) into The content divided is below above-mentioned higher limit, easily improves sintering resistance and fatigue life.

In the case of containing (E) composition in lubricant oil composite, the Boron contents of (B) composition are come from lubricant oil composite B (units：Quality ppm) with lubricant oil composite in whole phosphorus content P (units：Quality ppm) sum is relative to lubricating oil composition Sulfur content S (the units of (E) composition are come from thing：Quality ppm) ratio (B+P)/S, preferably 1~3, more preferably 1.2 with Above, it is more preferably more than 1.4, and more preferably less than 2.7, be more preferably less than 2.4, is still more preferably Less than 2.2, less than 2.0 are particularly preferably, is most preferably less than 1.8.By making ratio (B+P)/S to be more than above-mentioned lower limit, Easily improve sintering resistance and fatigue life.Also, by making ratio (B+P)/S be below above-mentioned higher limit, easily improve resistance to Coefficient of friction between agglutinating property, wear resistance, fatigue life and metal.

＜ (F) metal system cleaning agents ＞

In one preferred embodiment, lubricant oil composite further (can have below containing metal system cleaning agent When be referred to as " (F) composition ").

As (F) composition, the public affairs such as sulfonate system cleaning agent, phenates system cleaning agent, salicylate system cleaning agent can be used The metal system cleaning agent known, it can preferably use sulfonate and/or salicylate system cleaning agent.

As the preference of sulfonate system cleaning agent, can enumerate as obtained from by alkyl aromatic compound sulfonation The alkali salt of alkyl aryl sulfonate, its basic salt or super alkali formula (ultrabasic) salt.Alkyl aromatic compound Weight average molecular weight is preferably 400~1500, more preferably 700~1300.

As alkaline-earth metal, such as magnesium, barium, calcium, preferably magnesium or calcium can be enumerated.As alkyl aryl sulfonate, such as So-called mahogany acid or synthesis sulfonic acid can be enumerated.As mahogany acid mentioned here, can enumerate：By the profit of mineral oil The material that the alkyl aromatic compound sulfonation of lubricant oil fraction obtains, the so-called mahogany acid that by-product generates when manufacturing white oil etc.. In addition, one as synthesis sulfonic acid, it can enumerate：By reclaiming the pair in the Production from Alkyl Benzene manufacturing apparatus as the raw material of lotion Product or by the alkylbenzene sulfonation of alkyl that obtained benzene alkylation using polyolefin, that there is straight-chain or branched and Obtained material.As other one of synthesis sulfonic acid, can enumerate thing obtained from the alkylnaphthalene sulfonation of dinonyl naphthalene etc. Matter.In addition, as by sulfonating agent during these alkyl aromatic compound sulfonation, it is not particularly limited, such as hair can be used Cigarette sulfuric acid or anhydrous slufuric acid.

As the preference of phenates system cleaning agent, the alkali with the compound of structure shown in following formulas (5) can be enumerated The super basic salt of earth metal salt.

In formula (5), R⁶Represent that the straight or branched of carbon number 6~21, saturation or undersaturated alkyl or alkenyl, c are The degree of polymerization, 1~10 integer is represented, A is thioether (- S-) base or methylene (- CH₂-) base, the integer of d expressions 1~3.Its In, R⁶It can be not isoplastic combination of more than two kinds.

R in formula (5)⁶Carbon number be preferably 9~18, more preferably 9~15.R⁶Carbon number be less than 6 when, can The dissolubility to base oil can be caused poor, and in R⁶Carbon number more than 21 when, manufacture may be caused difficult, and heat resistance Difference.

Degree of polymerization c in formula (5) is preferably 1~3.By making degree of polymerization c within the range, it is possible to increase heat resistance.

As the preference of salicylate detergents, alkaline earth metal salicylate, its basic salt or super alkali formula can be enumerated Salt.As the preference of alkaline earth metal salicylate, the compound shown in following formulas (6) can be enumerated.

In formula (6), R⁷Separately represent the alkyl or alkenyl of carbon number 14~30.E represents 1 or 2, is preferably 1. Wherein, in e=2, R⁷It can be the combination of different groups.M represents alkaline-earth metal, preferably calcium or magnesium.

The manufacture method of alkaline earth metal salicylate is not particularly limited, and can use known monoalkyl salicylate Manufacture method etc..For example, using phenol as initiation material, it is alkylated using alkene, is carried out followed by carbon dioxide etc. Carboxylation obtains monoalkyl salicylic acid；Or using salicylic acid as initiation material, it is alkylated using the above-mentioned alkene of equivalent To monoalkyl salicylic acid etc., make the metal base of oxide or the hydroxide of alkaline-earth metal etc. and monoalkyl bigcatkin willow obtained above Acid etc. reacts；Or after first the alkali metal salt of sodium salt or sylvite etc. is temporarily made in monoalkyl salicylic acid by these etc., with Metal exchange etc. occurs for alkali salt, thus, it is possible to obtain alkaline earth metal salicylate.

(F) composition can be by super alkali formula.Obtain the side by the calcium sulfonate of super alkali formula, phenates or salicylate Method is not particularly limited, such as can be by the presence of carbon dioxide, making alkaline earth metal sulfonate, phenates or salicylic acid The alkali such as salt and calcium hydroxide, magnesium hydroxide reacts and obtained.

In the case where lubricant oil composite contains (F) composition, using lubricant oil composite total amount as benchmark, its content with Amount of metal (metallic element conversion amount) meter is preferably 100~1200 mass ppm, more preferably more than 200 mass ppm and more Preferably below 1000 mass ppm.Content by making (F) composition can make the friction of wet clutch within the above range Characteristic further improves.

＜ (G) ashless dispersants ＞

In one preferred embodiment, lubricant oil composite further can contain ashless dispersant (below sometimes Referred to as " (G) composition ").

As (G) composition, such as more than a kind of compound being selected from following (G-1)~(G-3) can be used.

(G-1) at least have succinimide of 1 alkyl or alkenyl or derivatives thereof (following to be sometimes referred to as in the molecule For " (G-1) composition "),

(G-2) at least there is the benzylamine of 1 alkyl or alkenyl or derivatives thereof (hereinafter sometimes referred to " (G- in the molecule 2) composition "),

(G-3) at least there is the polyamines of 1 alkyl or alkenyl or derivatives thereof (hereinafter sometimes referred to " (G- in the molecule 3) composition ").

As (G) composition, (G-1) composition is particularly preferably used.

As the succinimide at least in the molecule in (G-1) composition with 1 alkyl or alkenyl, can illustrate down State formula (7) or the compound shown in (8).

In formula (7), R⁸The alkyl or alkenyl of carbon number 40~400 is represented, f represents 1~5, preferably 2~4 integer.R⁸ Carbon number be preferably more than 60, and preferably less than 350.

In formula (8), R⁹And R¹⁰The alkyl or alkenyl of carbon number 40~400 is separately represented, can be different bases The combination of group.R⁹And R¹⁰It is particularly preferably polybutylene-based.Also, g represents 0~4, preferably 1~3 integer.R⁹And R¹⁰Carbon it is former Subnumber is preferably more than 60, and preferably less than 350.

By making the R in formula (7) and formula (8)⁸~R¹⁰Carbon number more than above-mentioned lower limit, can to obtain for profit The good dissolubility of lubricant base oil.On the other hand, by making R⁸~R¹⁰Carbon number for below above-mentioned higher limit, can Improve the low temperature flow of lubricant oil composite.

Alkyl or alkenyl (R in formula (7) and formula (8)⁸~R¹⁰) it is straight-chain or branched, it can preferably enumerate example Such as it is derived from the branched-chain alkyl or branch of propylene, 1- butylene, the oligomer of isobutene alkene or the co-oligomer of ethene and propylene Chain alkenyl.Wherein, most preferably be derived from traditionally be referred to as polyisobutene isobutene oligomer branched-chain alkyl or alkenyl, It is or polybutylene-based.

Alkyl or alkenyl (R in formula (7) and formula (8)⁸~R¹⁰) preferable number-average molecular weight be 800~3500.

At least the succinimide with 1 alkyl or alkenyl includes in the molecule：Only add in an end of polyamines chain Into the succinimide of monotype shown in the formula (7) for having succinic anhydride, so-called；There is amber with two terminal additions in polyamines chain The succinimide of dimorphism shown in the formula (8) of acid anhydrides, so-called.Can the succinyl containing monotype in lubricant oil composite The succinimide of imines and dimorphism it is any, both can also be contained in the form of mixture.

The manufacture method at least in the molecule with the succinimide of 1 alkyl or alkenyl is not particularly limited, such as Can by make to have carbon number 40~400 alkyl or alkenyl compound and maleic anhydride 100~200 DEG C of reactions and Alkyl succinic acid or alkenyl succinic acid are obtained, the alkyl succinic acid or alkenyl succinic acid is reacted and is obtained with polyamines.Here, make For polyamines, Diethylenetriamine, three second tetramines, tetren and five second hexamines can be illustrated.

As the benzylamine at least in the molecule in (G-2) composition with 1 alkyl or alkenyl, following formulas can be illustrated (9) compound shown in.

In formula (9), R¹¹The alkyl or alkenyl of carbon number 40~400 is represented, h represents 1~5, preferably 2~4 integer. R¹¹Carbon number be preferably more than 60, and preferably less than 350.

(G-2) preparation method of composition is not particularly limited.Such as method can be listed below：Make propylene oligomer, poly- fourth The polyolefin such as alkene or ethene-alpha-olefin copolymer and phenol reactant, alkylphenol is made, makes itself and formaldehyde and diethyl afterwards Mannich reaction occurs for the polyamines such as triamine, three second tetramines, tetren, five second hexamines.

As the polyamines at least in the molecule in (G-3) composition with 1 alkyl or alkenyl, following formula can be illustrated (10) compound shown in.

R¹²-NH-(CH₂CH₂NH)_i-H (10)

In formula (10), R¹²The alkyl or alkenyl of carbon number 40~400 is represented, i represents 1~5, preferably 2~4 integer. R¹²Carbon number be preferably more than 60, and preferably less than 350.

(G-3) preparation method of composition is not particularly limited.Such as method can be listed below：By propylene oligomer, polybutene Or after the polyolefin chlorination such as ethene-alpha-olefin copolymer, make itself and ammonia or ethylenediamine, Diethylenetriamine, three second tetramines, tetrem five The polyamines such as amine, five second hexamines react.

As the derivative in (G-1) composition~(G-3) composition, such as can enumerate：(i) by making above-mentioned dividing At least there is succinimide, benzylamine or the polyamines (hereinafter referred to as " above-mentioned nitrogen-containing compound ") of 1 alkyl or alkenyl in son Monocarboxylic acid, carbon number 2~30 with the carbon number 1~30 such as aliphatic acid polybasic carboxylic acid (such as oxalic acid, phthalic acid, Trimellitic acid, pyromellitic acid etc.), their acid anhydrides or ester compounds, the alkylidene oxide of carbon number 2~6 or hydroxyl (poly-) Part or all of the effect of oxyalkylene carbonic ester, remaining amino and/or imino group are neutralized or amidated utilize contains The modified compound that oxygen organic compound obtains；(ii) by making above-mentioned nitrogen-containing compound be acted on boric acid, remaining amino And/or part or all of imino group is neutralized or amidated boron modification compound；(iii) by making above-mentioned nitrogen Part or all of compound and phosphatizing, remaining amino and/or imino group are neutralized or amidated phosphoric acid modification Compound；(iv) sulphur modified compound as obtained from making above-mentioned nitrogen-containing compound be acted on sulphur compound；By right (v) Above-mentioned nitrogen-containing compound combination is implemented in using the modification of oxygen-containing organic compound, boron modification, phosphoric acid modification, sulphur modification Modification of more than two kinds obtained from modified compound.Among these (i)~(v) derivative, from can further improve profit From the aspect of the heat resistance of sliding oil composition, the boron modification compound of (G-1) composition is preferably used.

(G) molecular weight of composition is not particularly limited, and suitable weight average molecular weight is 1000~20000.

In the case where lubricant oil composite contains (G) composition, using lubricant oil composite total amount as benchmark, its content with Nitrogen component meter is preferably 100~2000 mass ppm, more preferably more than 500 mass ppm, and more preferably 1000 mass ppm Below.By making the content of (G) composition be more than above-mentioned lower limit, it is possible to increase the anti-coking properties of lubricant oil composite are (heat-resisting Property).Also, by making the content of (G) composition be below above-mentioned higher limit, it can further improve section combustion property.

In the case where using boron modification compound as (G) composition, using lubricant oil composite total amount as benchmark, lubrication The boron amount from (G) composition is preferably 50~500 mass ppm, more preferably more than 100 mass ppm, and more in fluid composition Preferably below 300 mass ppm.By making the Boron contents from (G) composition be below above-mentioned higher limit, can further improve Section combustion property.

＜ (H) phosphorus system extreme pressure compound ＞

In one preferred embodiment, lubricant oil composite further (can have below containing phosphorus system extreme pressure compound When be referred to as " (H) composition ").(H) composition can be used alone, and two or more can also be applied in combination.

As the example of (H) composition, zinc dialkyl dithiophosphate, phosphate monoester, di-phosphate ester, tricresyl phosphate can be enumerated The salt of the incomplete ester of salt, phosphorous acid of the incomplete ester of ester, monophosphite, diphosphite, tris phosphite, phosphoric acid and Their mixture.

Compound beyond above-mentioned example phosphorous acid is that generally have carbon number 2~30, preferably 3~20 alkyl Compound.As the alkyl of the carbon number 2~30, specifically, such as alkyl, cycloalkyl, alkyl substitution ring can be enumerated Alkyl, alkenyl, aryl, alkyl substituting aromatic base and aryl substituted alkyl.These alkyl are straight-chain or branched.

In addition, as the above-mentioned incomplete ester of phosphoric acid salt and the incomplete ester of phosphorous acid salt example, can enumerate：Make Nitrogen-containing compound and the phosphoric acid such as the amines of alkyl of alkyl or hydroxyl in ammonia or molecule only containing carbon number 1~8 Monoesters, di-phosphate ester, monophosphite or diphosphite, their mixture effect, thus by the one of the acidic hydrogen of remaining Salt obtained from partly or entirely neutralizing.

As (H) composition, phosphorous acid esters or its salt, the more preferably incomplete ester of phosphorous acid or its salt can be preferably used, Particularly preferably there is the incomplete ester of phosphorous acid or its salt of alkyl of the carbon number below 8.

In the case where lubricant oil composite contains (H) composition, using lubricant oil composite total amount as benchmark, its content with Phosphorus gauge be preferably 100~2000 mass ppm, more preferably more than 200 mass ppm, and more preferably 1000 mass ppm with Under.By making the content of (H) composition be more than above-mentioned lower limit, the system that rubbed between wear resistance and metal can be further improved Number.Also, by making the content of (H) composition be below above-mentioned higher limit, it is possible to increase oxidation stability and seal compatibility.

＜ (I) friction regulators ＞

In one preferred embodiment, lubricant oil composite further can contain friction regulator (below sometimes Referred to as " (I) composition ").(I) composition can be used alone, and two or more can also be applied in combination.

As (I) composition, the change used in lubricating oil field as friction regulator is used without special limitation Compound.As friction regulator, such as can enumerate in molecule containing more than a kind in oxygen atom, nitrogen-atoms, sulphur atom Miscellaneous element, carbon number 6~50 compound.More specifically, preferably using aliphatic amine compound, aliphatic The aliphatic acid of imide compound, the straight or branched alkyl at least in the molecule with 1 carbon number 6~30 or alkenyl The ashless of ester, fatty acid amide, fatty acyl hydrazide, fatty acid metal salts, aliphatic alcohol, fatty ether, aliphatic carbamide compound etc. rubs Wipe regulator.

As aliphatic amine compound, straight or branched, the aliphatic of preferred straight chain of carbon number 6~30 can be illustrated Monoamine；The aliphatic polyamine of the straight or branched of carbon number 6~30, preferably straight chain；And the oxidation of these aliphatic amines is sub- Alkyl addition product etc..

As aliphatic imide compound, can enumerate the straight or branched with carbon number 6~30 alkyl or The succinimide of alkenyl；And it utilizes modifier of carboxylic acid, boric acid, phosphoric acid or sulfuric acid etc. etc..

As fatty acid ester, the straight-chain or branched, the aliphatic acid of preferred straight-chain of carbon number 6~30 can be illustrated With the ester of aliphatic monobasic alcohol or aliphatic polyol etc..

As fatty acid amide, straight or branched, the preferably aliphatic acid of straight chain and the fat of carbon number 6~30 can be illustrated Acid amides of race's monoamine, aliphatic polyamine or ammonia etc..

As fatty acyl hydrazide, the straight-chain or branched, the aliphatic acid of preferred straight-chain of carbon number 6~30 can be illustrated With unsubstituted or substitution aliphatic hydrazides condensation product etc..

As fatty acid metal salts, straight or branched, the aliphatic acid of preferred straight chain of carbon number 6~30 can be illustrated , alkali salt (magnesium salts, calcium salt etc.) or zinc salt etc..

In the case where lubricant oil composite contains (I) composition, using lubricant oil composite total amount as benchmark, its content is excellent Elect 0.01~2 mass %, more preferably more than 0.1 mass %, more preferably more than 0.3 mass %, and more preferably as For below 1.0 mass %, more preferably below 0.8 mass %.By make the content of (I) composition for above-mentioned lower limit with On, it is possible to increase vibration-resistant.Also, by making the content of (I) composition be below above-mentioned higher limit, it can further improve gold Coefficient of friction between category.

＜ others additives ＞

In one embodiment, lubricant oil composite can further contain the extreme pressure compound being selected from beyond (H) composition Or the pour point depressant beyond EP agent, antioxidant, (D) composition, the preservative beyond (E) composition, antirust agent, (E) more than a kind in the matal deactivator beyond composition, defoamer, anti emulsifier and colouring agent.

As the extreme pressure compound or EP agent beyond (H) composition, can enumerate disulfides, thio olefines, Chalcogenide compound of thio grease type etc. etc..Contain extreme pressure compound or the extreme pressure addition beyond (H) composition in lubricant oil composite In the case of agent, using lubricant oil composite total amount as benchmark, its content is usually 0.01~5 mass %.

As antioxidant, the metal system that can enumerate the ashless antioxidant of phenol system, amine system etc., copper system, molybdenum system etc. resists Oxidant.Specifically, for example, as phenol system ashless antioxidant, 4 can be enumerated, 4 '-di-2-ethylhexylphosphine oxide (2,6- bis- tertiary fourths Base phenol), 4,4 '-bis- (2,6- DI-tert-butylphenol compounds) etc., as amine system ashless antioxidant, can enumerate phenyl-α- Naphthylamines, alkyl phenyl-alpha-naphthylamine, dialkyl group diphenylamine etc..In the case where lubricant oil composite contains antioxidant, with For lubricant oil composite total amount as benchmark, its content is usually 0.01~5 mass %.

, can be with the character of used lube base oil correspondingly as the pour point depressant beyond (D) composition Use the pour point depressant such as known to polymethacrylates system polymer.Contain pour point drop in lubricant oil composite In the case of low dose, using lubricant oil composite total amount as benchmark, its content is usually 0.05~1 mass %.

As the preservative beyond (E) composition, for example, enumerate BTA system, azimido-toluene system and imidazoles system can be used Preservative known to compound etc..In the case of the preservative that lubricant oil composite contains beyond (E) composition, with lubricating oil group For compound total amount as benchmark, its content is usually 0.005~5 mass %.

As antirust agent, for example, petroleum sulfonate, alkylbenzenesulfonate, dinonylnaphthalene sulfonic acid salt, alkenyl amber can be used Antirust agent known to amber acid esters and polyol ester etc..In the case where lubricant oil composite contains antirust agent, with lubricating oil composition For thing total amount as benchmark, its content is usually 0.005~5 mass %.

As the matal deactivator beyond (E) composition, for example, imidazoline, pyrimidine derivatives, sulfydryl benzo thiophene can be used Known in azoles, BTA and its derivative, 2- (alkyl two is thio) benzimidazoles and β-(adjacent carboxybenzyl is thio) propionitrile etc. Matal deactivator.In the case of the matal deactivator that lubricant oil composite contains beyond (E) composition, with lubricant oil composite For total amount as benchmark, its content is usually 0.005~5 mass %.

As defoamer, for example, defoamer known to organosilicon, fluoro organosilicon and fluoroalkyl ether etc. can be used. In the case that lubricant oil composite contains defoamer, using lubricant oil composite total amount as benchmark, its content is usually 0.0005 ~0.01 mass %.

As anti emulsifier, resist for example, can use known to PAG system nonionic surfactants etc. Emulsifying agent.In the case where lubricant oil composite contains anti emulsifier, using lubricant oil composite total amount as benchmark, its content is led to Often it is 0.005~5 mass %.

As colouring agent, for example, colouring agent known to azo-compound etc. can be used.

＜ lubricant oil composites ＞

Kinematic viscosity of the lubricant oil composite at 40 DEG C is 25mm²/ below s.And preferably 10mm²It is/more than s, more excellent Elect 12mm as²/ more than s, more preferably 15mm²/ more than s.By making kinematic viscosity of the lubricant oil composite at 40 DEG C be 25mm²/ below s, it is possible to increase section combustion property.Also, by making kinematic viscosity of the lubricant oil composite at 40 DEG C under above-mentioned More than limit value, the oil film of lubricant housings can be adequately formed, easily improves wear resistance.

Kinematic viscosity of the lubricant oil composite at 100 DEG C is preferably 5.0mm²/ more than s.And preferably 9.0mm²/ s with Under, more preferably 8.0mm²/ below s, more preferably 7.0mm²/ below s.By making lubricant oil composite at 100 DEG C Kinematic viscosity is more than above-mentioned lower limit, can be adequately formed the oil film of lubricant housings, easily improve wear resistance.In addition, By making lubricant oil composite kinematic viscosity at 100 DEG C be below above-mentioned higher limit, section combustion property is easily improved.

The viscosity index (VI) of lubricant oil composite is preferably more than 170.The upper limit of the viscosity index (VI) of lubricant oil composite does not have Especially limitation, usually less than 300.By making the viscosity index (VI) of lubricant oil composite be more than 170, section combustion property is easily improved.

(hereinafter sometimes referred to " BF glues Brooker Fil moral (Brookfield) viscosity of lubricant oil composite at -40 DEG C Degree ") it is preferably below 8,000mPas, more preferably below 7,000mPas.By making lubricant oil composite at -40 DEG C BF viscosity be 8, below 000mPas, it is possible to increase low-temperature startup.

(purposes)

The lubricant oil composite of the present invention can be preferably used as the buncher oil of automobile using etc., particularly preferred for warp The lubrication of the metal band type stepless speed variator of torque is transmitted by metal tape.

Embodiment

More specific description is carried out to the present invention below based on embodiment and comparative example.But the present invention is not limited to these realities Apply example.

＜ embodiments 1~19 and the ＞ of comparative example 1~7

As shown in table 1~3, the lubricant oil composite (embodiment 1~19) of the present invention and the lubrication compared are prepared respectively Fluid composition (comparative example 1~7).In table, the content of base oil is using base oil total amount as benchmark, and the content of each additive is with group Compound total amount is as benchmark.The details of composition is as described below.

((A) lube base oil)

A1-1：Paraffin isomerization base oil (kinematic viscosity (40 DEG C)：9.072mm²/ s, kinematic viscosity (100 DEG C)： 2.621mm²/ s, viscosity index (VI)：127th, sulphur composition：Less than 10 mass ppm, %C_P：91.8, %C_N：8.2nd, %C_A：0)

A1-2：Paraffin isomerization base oil (kinematic viscosity (40 DEG C)：9.617mm²/ s, kinematic viscosity (100 DEG C)： 2.653mm²/ s, viscosity index (VI)：112nd, sulphur composition：Less than 10 mass ppm, %C_P：92.5, %C_N：7.3rd, %C_A：0.1)

A2-1：Paraffin isomerization base oil (kinematic viscosity (40 DEG C)：15.65mm²/ s, kinematic viscosity (100 DEG C)： 3.883mm²/ s, viscosity index (VI)：142nd, sulphur composition：Less than 10 mass ppm, %C_P：92.5, %C_N：7.5th, %C_A：0)

A2-2：Paraffin isomerization base oil (kinematic viscosity (40 DEG C)：18.24mm²/ s, kinematic viscosity (100 DEG C)： 4.119mm²/ s, viscosity index (VI)：130th, sulphur composition：Less than 10 mass ppm, %C_P：89.1, %C_N：10.9, %C_A：0)

((B) boric acid ester compound)

B-1：Boric acid list (C_6-8Alkyl) ester, B：2.83 quality %

((C) phosphoric acid)

C-1：Phosphoric acid, P：36 mass %

((D) poly- (methyl) acrylate)

D-1：Non-dispersive type polymethacrylates, weight average molecular weight：20,000

D-2：Non-dispersive type polymethacrylates, weight average molecular weight：50,000

D-3：Decentralized polymethacrylates, weight average molecular weight：40,000

D-4：Decentralized polymethacrylates, weight average molecular weight：150,000

((E) thiadiazole compound)

E-1：Thiadiazole compound, S shown in formula (2)~(4), that there is alkyl disulfide group：36 mass %

((F) metal system cleaning agent)

F-1：Ca sulfonate, Ca：18.4 quality %

F-2：Ca salicylates, Ca：8.1 mass %

((G) ashless dispersant)

G-1：Succinimide, N：2.1 mass %

G-2：Boracic succinimide, N：2.3 mass %, B：2.0 mass %

((H) phosphorus system extreme pressure compound)

H-1：Two (normal-butyl) phosphite esters, P：15.5 quality %

H-2：Hydrogen phosphite diphenyl ester (diphenyl hydrogen phosphite), P：13.2 quality %

((I) friction regulator)

I-1：Oleyl amine

I-2：Oleamide

I-3：Aliphatic acid and the condensation product of aliphatic monoamine, carbon number 67~86

((J) other additives)

J-1：Swell rubber agent

J-2：Amine system antioxidant

J-3：Dimethyl silscone defoamer, kinematic viscosity (25 DEG C)：60,000mm²/s

【Table 1】

【Table 2】

【Table 3】

(low-temperature viscosity profiles)

For each lubricant oil composite, viscosity (BF during -40 DEG C of oil temperature is determined using Brookfield Viscometer respectively Viscosity).Show the result in table 1~3.If BF viscosity at -40 DEG C in 8, below 000mPas, then can interpolate that and be glued for low temperature It is good to spend characteristic.

(shear stability test)

For each lubricant oil composite, tested by the shear stable degree based on JPI-5S-29-88, evaluate lubricating oil The shear stability of composition.It is small from vibrator to sample oil irradiation frequency 10kHz, 28 μm of the amplitude of vibrator ultrasonic wave 1 When, calculate irradiation ultrasonic wave after kinematic viscosity of the sample oil at 100 DEG C relative to irradiation ultrasonic wave before sample oil at 100 DEG C When kinematic viscosity reduced rate (%).Show the result in table 1~3.If the kinematic viscosity reduced rate of this experiment below 2.5, Then can interpolate that for shear stability it is good.

(EHL experiments)

For each lubricant oil composite, using EHL testing machines (PCS company system EHD2 oil film thicknesses meter), pass through light Oil film thickness under interferometric method measure elastohydrodynamic behaviour state.Condition determination is as follows.

Steel ball：PCS Standard Ball (materials：SUJ-2), diameter 19.05mm

Disk (disk)：The layers of chrome on the surface with glass substrate, coated on glass substrate and two coated on layers of chrome surface The glass plate of silicon oxide layer

Oil temperature：80℃

Loading：20N

Mean Hertz stress：0.5GPa

Circumferential speed：1m/s

Sliding ratio：10%

Show the result in table 1~3.If the oil film thickness measured in this experiment in below 55nm, can interpolate that as oil film Thickness is sufficiently thin.

(high speed four-ball test)

For each lubricant oil composite, by the high speed four-ball test based on JPI-5S-40-93, lubricating oil group is evaluated The resistance to loading performance of compound.

(1) final non-sintered loading (LNSL) is determined with rotating speed 1800rpm.

(2) determine with the friction marks diameter after rotating speed 1200rpm, loading 392N, the operating 30 minutes of 80 DEG C of oil temperature.

Show the result in table 1~3.If LNSL is in more than 618N in this experiment, can interpolate that as resistance to loading performance (resistance to burning Knot property) it is good.In addition, if friction marks footpath in below 0.70mm, can interpolate that as excelling in abrasion resistance.

(FALEX sintering tests)

For each lubricant oil composite, resistance to loading performance is evaluated by the FALEX sintering tests based on ASTM D3233. Under conditions of 110 DEG C of oil temperature, the pin for the steel for making to be clamped by the V blocks of 2 static steels is rotated with 290rpm, and measure occurs The loading of sintering.Show the result in table 1~3.If the loading sintered in this experiment in more than 3900N, can be sentenced Break as resistance to loading performance (sintering resistance) well.

(Unisteel experiments)

For each lubricant oil composite, using Unisteel rolling fatigue testings machine, (3 connect formula high temperature rolling fatigue testing machine (TRF-1000/3-01H), Co., Ltd.'s motivation test system), (institute of petroleum in britain's method is tested by Unisteel： IP305/79 the rolling fatigue life of thrust bearing) is determined.For with flat test film (material：SUJ2 needle roller thrust) is changed Test bearing obtained from the rail wheel of the side of bearing (NSK FNTA-2542C), in loading 7000N, face pressure 2GPa, turn Under conditions of fast 1450rpm, 120 DEG C of oil temperature, determine until the time of fatigue damage occurs for any one of roller bearing or test film.Its In, the vibration acceleration in the experiment portion measured by Unisteel rolling fatigue testing machine possessed vibration accelerations reaches 1.5m/s²When, judge that there occurs fatigue damage.Until the time of generation fatigue damage in being tested according to 10 repetitions, according to prestige Boolean Graphs are as 50% life-span (L50：Accumulated probability reaches for 50% time) calculate fatigue life.Show the result in table 1~3. If 50% life-span measured in this experiment more than 1200 minutes, can interpolate that for fatigue life it is good.

(LFW-1 experiments)

For each lubricant oil composite, according to JASO M358-2005 (coefficient of friction characteristics between the metal of belt CVT oil Experiment, high loading method), coefficient of friction is (dynamic to rub between determining metal using Block on Ring friction wear testing machines (LFW-1) Wipe coefficient).Experimental condition is block (Block)：H60, ring (Ring)：S10, loading 1112N, sliding speed 0.5m/s, oil temperature 90 ℃.Show the result in table 1~3.If coefficient of friction is more than 0.90 between the metal measured in this experiment, can interpolate that as metal Between coefficient of friction it is sufficiently high.

(evaluation result)

The lubricant oil composite of embodiment 1~19 is in low-temperature viscosity profiles, shear stability, oil film thickness, resistance to loading Good result is shown between energy (sintering resistance), wear resistance, fatigue life and metal in terms of coefficient of friction.

(B) lubricant oil composite of the very few comparative example 1 of the content of composition, wear resistance and sintering resistance are poor.

(B) lubricant oil composite of the excessive comparative example 2 of the content of composition, sintering resistance and fatigue life are poor.

(C) lubricant oil composite of the very few comparative example 3 of the content of composition, wear resistance and sintering resistance are poor.

(C) lubricant oil composite of the excessive comparative example 4 of the content of composition, sintering resistance and fatigue life are poor.

Lubricant oil composite without (B) composition He the comparative example 5 of (C) composition, sintering resistance, wear resistance, tired longevity Coefficient of friction is poor between life and metal.

(B) lubricant oil composite of the excessive comparative example 6 of the content of composition and (C) composition, fatigue life are poor.

The polymethacrylates outside (D) composition range is coordinated to replace the lubricating oil composition of the comparative example 7 of (D) composition Thing, shear stability are poor.

Claims

1. a kind of lubricating oil for non-stage transmission composition, it is characterised in that contain：

(A) lube base oil,

(B) using lubricant oil composite total amount as benchmark, the boric acid more than 25 mass ppm below 500 mass ppm is calculated as with boron amount Ester compounds,

(C) using lubricant oil composite total amount as benchmark, the phosphorus more than 100 mass ppm below 750 mass ppm is calculated as with phosphorus amount Acid, and

(D) weight average molecular weight 100, less than 000 poly- (methyl) acrylate,

Kinematic viscosity of the lubricant oil composite at 40 DEG C is 25mm²/ below s.

2. lubricating oil for non-stage transmission composition as claimed in claim 1, it is characterised in that：

Also contain (E) using lubricant oil composite total amount as benchmark, with sulfur content be calculated as more than 180 mass ppm 900 mass ppm with Under thiadiazole compound,

Boron contents B from described (B) composition in lubricant oil composite and the phosphorus content P sums in lubricant oil composite relative to Ratio (B+P)/S of sulfur content S from described (E) composition in lubricant oil composite is less than more than 13, wherein, the boron contains The unit for measuring B, phosphorus content P and sulfur content S is quality ppm.

3. lubricating oil for non-stage transmission composition as claimed in claim 1 or 2, it is characterised in that：

(A) lube base oil contains base oil (A1), and with or without base oil (A2),

The kinematic viscosity when base oil (A1) is 100 DEG C is 2.8mm²/ below s, viscosity index (VI) are more than 110, %C_PFor 90 Base oil above, using lube base oil total amount as benchmark, the content of the base oil (A1) is more than 30 mass % 100 Below quality %；

The kinematic viscosity when base oil (A2) is 100 DEG C is 3mm²/ more than s 10mm²/ below s, API Group IIIs basis Oil, IV classes base oil or their mixed base oil, when containing base oil (A2), base is used as using lube base oil total amount Standard, the content of the base oil (A2) is below 70 mass %,

Using lube base oil total amount as benchmark, the content of the base oil in addition to the base oil (A1) and (A2) is 0 matter The mass % of more than % 4 are measured,

Kinematic viscosity of (A) lube base oil at 100 DEG C is 3.4mm²/ below s.

4. such as lubricating oil for non-stage transmission composition according to any one of claims 1 to 3, it is characterised in that：

(B) composition is more than a kind of boric acid ester compound shown in following formulas (1),

In formula (1), R¹For the alkyl of carbon number 1~30, R²And R³It is separately hydrogen atom or carbon number 1~30 Alkyl.