CN1197943C - Additive composition for lubricant oil and its application - Google Patents

Abstract

A lubricating oil additive composition, based on the total weight of additives, comprising: (I) 1-30% metal detergent containing sodium; (II) 3-50% metal detergent containing calcium or magnesium; (III) 3-70% ashless dispersant; (VI) 3-50% antioxidant and anti-corrosion agent; (V) 0-20% diluent oil. The lubricating oil additive composition provided by the present invention contains the sodium salt of the specific effect component, which has a stronger neutralizing effect on the acidic substances produced during the combustion of ethanol fuel, and is therefore particularly suitable for use in automobile engines that use a mixture of gasoline and ethanol as fuel. .

Description

Lubricating oil additive composition and its application

technical field

The invention belongs to lubricants, in particular to lubricating oil additive compositions and applications thereof.

technical background

Automobile engines use ethanol-containing fuels, which can reduce exhaust emissions, meet environmental protection requirements, and save oil resources at the same time. Experiments have found that mixing ethanol with gasoline as fuel for cars can cause problems such as increased corrosion, pre-ignition and increased engine deposits. Therefore, ordinary engine oils are not suitable for use in engines with this type of fuel. For example, European Patent EP0411539 is only directed to gasoline engines with spark plug ignition. Chinese patents CN1138622A and CN1138623A are only aimed at the engine lubrication of gasoline as fuel. The lubricating oil composition provided by the invention considers the characteristics of ethanol fuel and proposes a new formula.

Contents of the invention

The object of the present invention is to provide a lubricating oil additive composition, which can be used for spark plug type or electric injection type gasoline-fueled engines, and can be used for ethanol fueled engines.

Another object of the present invention is to provide the use of the above lubricating oil additive composition.

The additive composition provided by the invention is based on the total weight of the additive, comprising:

(1) metal detergent containing sodium, 1-30%, preferably 2-20%, more preferably 3-10%;

(II) Metal detergents containing other metals, 3-50%, preferably 10-40%, more preferably 15-25%;

(III) Ashless dispersant, 3-70%, preferably 10-50%, more preferably 25-40%;

(VI) Antioxidant and anticorrosion agent, 3-50%, preferably 10-35%, more preferably 15-25%;

(V) diluent oil, 0-20%, preferably 3-15%, more preferably 5-10%.

Said metal detergent containing sodium (Na) can be an organic sulfonate or alkyl salicylate with a base value of 100-400, preferably 250-400.

Said calcium- and magnesium-containing metal detergents are calcium (Ca) and magnesium (Mg) sulfurized alkylphenates, organic sulfonates, and alkyl salicylic acids with a base value of 25 to 400, preferably 100 to 400. salt or their mixtures.

The said ashless dispersant can be monopolyisobutenyl or bispolyisobutenyl succinimide with a nitrogen content of 1.0-2.5%.

Said antioxidant anticorrosion agent can be zinc (Zn) or molybdenum (Mo) dialkyl dithiophosphate or dialkyl dithiocarbamate, aromatic amine compound, phenolic compound or their mixture.

Said diluent oil is a lubricating oil with a viscosity of 3-10 mm ² /s, which may be mineral oil, synthetic oil, hydrogenation process base oil and their mixtures.

The additive composition provided by the invention can be used for lubricating gasoline engines when added to base oil, wherein the added amount of the additive composition (based on the weight of the base oil) is 3.5-15%, preferably 5-10%. Other formulation components such as viscosity index improvers and pour point depressants can also be added to the base oil.

The lubricating oil additive composition provided by the present invention contains the sodium salt of the special effect component, which has a stronger neutralizing effect on the acidic substances produced during the combustion of ethanol fuel, and is therefore particularly suitable for use in automobile engines fueled by a mixture of gasoline and ethanol .

Detailed ways

Embodiment 1: Lubricating oil additive composition T-1

In a heat-resistant container, add 8g Maoming 150SN base oil, 2g sodium sulfonate, 10g sulfurized calcium phenate calcium, 12g calcium sulfonate, 16g dialkyl zinc dithiophosphate T202. 10g polyisobutenyl monobutyl Diimide T151A, 15g of polyisobutenyl bis-succinimide T152, heated to 60-70°C while stirring, and kept for about 20 minutes to make the material uniform and obtain a viscous liquid.

Embodiment 2: Lubricating oil additive composition T-2

In a heat-resistant container, add 6g Dalian 150SN base oil, 6g sodium sulfonate, 2g magnesium sulfonate, 8g sulfurized alkylphenate calcium, 5g calcium sulfonate, 16g T202, 25g T151A, and heat to 60 while stirring ~70°C, maintain for about 20 minutes to make the material uniform and obtain a viscous liquid.

Comparative example: Lubricating oil additive composition T-3

In a heat-resistant container, add 10g of Dalian 150SN base oil, 8g of calcium sulfate alkylate, 22g of calcium sulfonate, 16g of T202, 10g of T151A, 15g of T152, and heat to 60-70°C while stirring for about 20 minutes. Homogenize the material to obtain a viscous liquid.

Example 4:

Prepare a lubricating oil composition A-1 of the present invention with a viscosity grade of 15W/40 of a full component, the base oil used is Daqing paraffinic base oil, add additive composition T-1, viscosity index improver, pour point depressant, its The allocation plan is as follows.

Component name Added amount, % Daqing Paraffinic Base Oil 150SN500SN Viscosity Index Improver OCP Pour Point Depressant T803 Additive Composition T-1  41458.00.55.5

Example 5:

Prepare a lubricating oil composition A-2 of the present invention with a viscosity grade of SAE30, the base oil is Daqing paraffin base oil, and additive composition T-1 and pour point depressant are added. The formulation scheme is shown in the following table. component name Amount added, % Daqing paraffin base oil 500SN pour point depressant T803 additive composition T-1 93.30.26.5

Embodiment 6:

Prepare a lubricating oil composition A-3 of the present invention with a full-component 10W/30 viscosity grade, the base oil is Daqing hydrogenated base oil, add additive composition T-1, viscosity index improver, pour point depressant, and its deployment The scheme is shown in the table below. component name Amount added, % Daqing hydrogenated base oil 5#10# viscosity index improver OCP pour point depressant T803 additive composition T-1 44.547.73.00.34.5

The properties of A-1, A-2, A-3 compositions are as follows project A-1 A-2 A-3 Kinematic viscosity at 100°C, mm ² /s Dynamic viscosity at low temperature, mpa·sPDSC, Min into coke plate, stop for 1hr, mg continuous for 6hr, mg 13.52760 (-15°C) 28.53867 11.220158 10.533400 (-10°C) 26.764586

Embodiment 7:

Prepare a lubricating oil composition A-4 of the present invention with 15W/40 viscosity grade of a full component, base oil is Daqing paraffin base oil, add additive composition (T-2) 7.0%, viscosity index improver, pour point depressant , compared with a SF reference oil, the simulation evaluation results are shown in the table below. project A-4 SF reference oil PDSC induction period, scattered spots at 210°C, % sludge formation test, mg into coke plate, stop for 1 hr, mg for 6 hr, mg 30.5862862548 27.08634164129

The above oxidation test PDSC induction period, sludge formation test, scattered spot test, coke plate test of high temperature detergency show that the lubricating oil composition of the present invention is better than SF reference oil, and can be used for the quality level required by gasoline fuel For SF-class engines.

Embodiment 8:

Prepare a full-component lubricating oil composition A-5 of the present invention with a viscosity grade of 15W/40, the base oil is Daqing paraffin base oil, add 5.5% of the additive composition (T-1), a viscosity index improver, and a pour point depressant , compared with a special 15W/40 SF/CC grade oil for Xiali, this oil product has passed the driving test on the Xiali car, the test fuel is ethanol-containing fuel (15% ethanol is added to gasoline), and the engine is spark plug ignition. The simulation evaluation results are shown in the table below. project A-5 15W/40 SF/CC PDSC induction period, 210 ℃ into a coke plate, off 1hr, mg continuous 6hr, mg 28.54075 18.758166

The oxidation test PDSC induction period of the above table and the coke plate test of high temperature detergency show that the performance of the lubricating oil composition of the present invention is better than that of 15W/40 SF/CC special oil, and can be used as a spark plug ignition engine that uses ethanol-containing fuel. Lubrication of the engine of the car.

Embodiment 9:

Prepare a lubricating oil composition A-6 of the present invention with a viscosity grade of 15W/40, the base oil is Daqing paraffin base oil, add additive composition (T-2) 8.0%, viscosity index improver, pour point depressant , compared with Santana car-specific engine oil 15W/40SG, the oil product has passed the driving test, the test fuel is ethanol-containing fuel (15% ethanol is added to gasoline), and the engine is ignited by electronic injection. The simulation evaluation results are shown in the table below. project A-6 15W/40SG PDSC induction period, 210 ℃ into a coke plate, off 1hr, mg continuous 6hr, mg scattered spots, % sludge formation test, mg 32.5205888254 19.07434185896

The oxidation test PDSC induction period of the above table, the coke plate test of high temperature detergency, the sludge formation test, and the scattered spot test show that the performance of the lubricating oil composition of the present invention is better than that of 15W/40SG special oil, and can be used as an ethanol-containing fuel. , Engine lubrication of cars with EFI ignition.

Example 10:

Prepare a full-component lubricating oil composition A-7 of the present invention with a viscosity grade of 15W/40, the base oil is Daqing paraffin base oil, add 6.5% of the additive composition (T-1), a viscosity index improver, and a pour point depressant ; Lubricating oil composition A-8 of the present invention of the 15W/40 of preparation a whole component, base oil is Daqing paraffin base oil, add additive composition (T-3) 6.5%, viscosity index improver, pour point depressant as Comparison; the test results are shown in the following table: project A-7 A-7 ^* A-8 A-8 ^* Base value, mgKOH/g Base value decrease rate, % Acid value, mgKOH/g Acid value increase rate, % 8.91.42 8.54.51.8631 7.81.75 7.71.32.4238.3

Note: A-7 ^* and A-8 ^* are 0.2% weak acid added to A-7 and A-8.

It can be seen from the above table that the increase rate of the acid value of the A-7 oil with sodium salt added to the lubricating oil composition is lower than that of the A-8 oil without sodium salt. It can improve the acid neutralization ability of the oil, which is especially important in engine lubricating oil containing ethanol fuel.

Claims (11)

1. an additive composition for lubricant oil is characterized in that, is benchmark with the additive gross weight, comprising:

(I) 1～30% metal detergent that contains sodium;

(II) metal detergent of 3～50% calcics or magnesium, the metal detergent of said calcic, magnesium are the mixtures of alkyl monosulfide phenates, organic sulfonate, and wherein the mass ratio of alkyl monosulfide phenates and organic sulfonate is 5/6～8/7;

(III) 3～70% ashless dispersants;

(VI) 3～50% oxidation and corrosion inhibitors;

(V) 0～20% thinning oil.

2. according to the described composition of claim 1, it is characterized in that the content that (I) contains the metal detergent of sodium is 2～20%; (II) content of the metal detergent of calcic or magnesium is 10～40%; (III) content of ashless dispersant is 10～50%; (VI) content of oxidation and corrosion inhibitor is 10～35%; (V) content of thinning oil is 3～15%.

3. according to the described composition of claim 1, it is characterized in that the content that (I) contains the metal detergent of sodium is 3～10%; (II) content of the metal detergent of calcic or magnesium is 15～25%; (III) content of ashless dispersant is 25～40%; (VI) content of oxidation and corrosion inhibitor is 15～25%; (V) content of thinning oil is 5～10%.

4. according to the described composition of claim 1, it is characterized in that the said metal detergent that contains sodium is that base number is 100～400 organic sulfonate or alkylsalicylate.

5. according to the described composition of claim 4, it is characterized in that the said base number that contains the metal detergent of sodium is 250～400.

6. according to the described composition of claim 1, it is characterized in that the metal detergent base number of said calcic, magnesium is 25～400.

7 according to the described composition of claim 6, it is characterized in that, the base number of the metal detergent of said calcic, magnesium is 100～400.

8. according to the described composition of claim 1, it is characterized in that said ashless dispersant is that nitrogen content is 1.0～2.5% single polyisobutenyl or butyric two pairs of polyisobutylene imide.

9. according to the described composition of claim 1, it is characterized in that said oxidation and corrosion inhibitor is selected from dialkyl dithiophosphate or dialkyl dithiocarbamate, aromatic amine compounds, phenolic compound or their mixture of zinc or molybdenum.

10. according to the described composition of claim 1, it is characterized in that said thinning oil is that viscosity is 3～10mm ²The lubricating oil of/s,

11. the purposes of the described composition of claim 1～10 is characterized in that, adds described compositions of additives in base oil, add-on is 35～15%, and being used for gasoline and alcohol mixture is motor car engine lubricated of fuel.