CN113862064A - Engine oil composition - Google Patents

Engine oil composition Download PDF

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Publication number
CN113862064A
CN113862064A CN202111194621.4A CN202111194621A CN113862064A CN 113862064 A CN113862064 A CN 113862064A CN 202111194621 A CN202111194621 A CN 202111194621A CN 113862064 A CN113862064 A CN 113862064A
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Prior art keywords
engine oil
fumarate
oil composition
weight
dispersant
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CN202111194621.4A
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Inventor
赵佳洋
赵磊
付丽雪
李程
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China Petroleum and Chemical Corp
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China Petroleum and Chemical Corp
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Priority to CN202111194621.4A priority Critical patent/CN113862064A/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
    • C10M169/04—Mixtures of base-materials and additives
    • C10M169/048—Mixtures of base-materials and additives the additives being a mixture of compounds of unknown or incompletely defined constitution, non-macromolecular and macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/022—Ethene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
    • C10M2205/024—Propene
    • C—CHEMISTRY; METALLURGY
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    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/04—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing aromatic monomers, e.g. styrene
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
    • C10M2205/06—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/144—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings containing hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/283—Esters of polyhydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/28—Esters
    • C10M2207/287—Partial esters
    • C10M2207/289—Partial esters containing free hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/06—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to an acyloxy radical of saturated carboxylic or carbonic acid
    • C10M2209/062—Vinyl esters of saturated carboxylic or carbonic acids, e.g. vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/084—Acrylate; Methacrylate
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
    • C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
    • C10M2209/086—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type polycarboxylic, e.g. maleic acid
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/086—Imides
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
    • C10M2219/04—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions containing sulfur-to-oxygen bonds, i.e. sulfones, sulfoxides
    • C10M2219/044—Sulfonic acids, Derivatives thereof, e.g. neutral salts
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2223/00—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions
    • C10M2223/02—Organic non-macromolecular compounds containing phosphorus as ingredients in lubricant compositions having no phosphorus-to-carbon bonds
    • C10M2223/04—Phosphate esters
    • C10M2223/045—Metal containing thio derivatives
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/02—Pour-point; Viscosity index
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/04—Detergent property or dispersant property
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/08—Resistance to extreme temperature
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/10—Inhibition of oxidation, e.g. anti-oxidants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
    • C10N2040/00—Specified use or application for which the lubricating composition is intended
    • C10N2040/25—Internal-combustion engines

Abstract

The present disclosure relates to an engine oil composition comprising, based on the total weight of the engine oil composition: 0.1-0.4 wt% of pour point depressant, 1.5-8.0 wt% of viscosity index improver, 1.79-3.93 wt% of detergent, 0.64-3.07 wt% of dispersant, 1.04-3.67 wt% of antioxidant, 0.01-5 wt% of friction reducer, 0.3-1.5 wt% of zinc dialkyl dithiophosphate and the balance of neutral base oil; the pour point depressant comprises a vinyl acetate-fumarate pour point depressant; the vinyl acetate-fumaric acid ester pour point depressant comprises the following components: 0.4 to 0.6 weight portion of octal fumarate, 0.8 to 1.2 weight portions of dodecyl fumarate, 0.8 to 1.2 weight portions of tetradecyl fumarate, 0.8 to 1.2 weight portions of hexadecyl fumarate and 0.8 to 1.2 weight portions of octadecyl fumarate. The engine oil composition has good emulsification holding capacity, wear resistance, cleaning and dispersing properties.

Description

Engine oil composition
Technical Field
The invention relates to the technical field of engine oil, in particular to an engine oil composition.
Background
The average working temperature of the engine oil in the running process of the engine is 80-90 ℃, and the maximum working temperature can reach 150 ℃. When the engine stops operating, the working temperature of the engine oil is rapidly reduced, the generation of condensed water and the mixing of the condensed water into the engine are inevitable, and the phenomenon is more common particularly in a severe cold area when the temperature is more rapidly reduced. In addition, alcohol fuel has high volatility and large combustion water amount compared with gasoline and diesel oil, so that ethanol/methanol and water are easily mixed in engine oil, the ethanol/methanol content in general non-water engine equipment or alcohol fuel is less than 15%, the water and alcohol mixed in the engine oil is not more than 10%, and under the condition of the proportion, the water or ethanol/methanol is difficult to be removed by adopting a method of draining water from an oil-water separator or an oil pan. Under the condition of low temperature, the water layer is frozen after the engine oil and the water are separated, on one hand, the abrasion of the engine is increased, and on the other hand, the low-temperature starting performance of the engine is seriously influenced. When the engine oil contains a small amount of water and alcohol and cannot be separated from the engine oil, the emulsion formed by the engine oil and the water/alcohol is a lubrication protection for the engine, so that the engine oil has a certain emulsion retention capability.
It is common in the industry to add a certain amount of emulsifier to improve the emulsion retention of engine oil, and the emulsifier as a surfactant has a competitive relationship with other surface active ingredients in the formulation, such as detergents, dispersants, anti-foaming agents, etc., and influences the performance of the respective active ingredients.
Therefore, it is desirable to provide an engine oil that can avoid the addition of emulsifiers to disrupt the balance of the formulation and has a certain emulsion retention capability.
Disclosure of Invention
An object of the present disclosure is to provide an engine oil composition that can achieve good retention capability while ensuring low-temperature flow properties, thereby satisfying API SN and above-level specification requirements.
In order to achieve the above object, the present disclosure provides an engine oil composition comprising, based on the total weight of the engine oil composition: 0.1-0.4 wt% of pour point depressant, 1.5-8.0 wt% of viscosity index improver, 1.79-3.93 wt% of detergent, 0.64-3.07 wt% of dispersant, 1.04-3.67 wt% of antioxidant, 0.01-5 wt% of friction reducer, 0.3-1.5 wt% of zinc dialkyl dithiophosphate and the balance of neutral base oil; the pour point depressant comprises a vinyl acetate-fumarate pour point depressant which comprises the following components in parts by weight: 0.4 to 0.6 weight portion of octal fumarate, 0.8 to 1.2 weight portions of dodecyl fumarate, 0.8 to 1.2 weight portions of tetradecyl fumarate, 0.8 to 1.2 weight portions of hexadecyl fumarate and 0.8 to 1.2 weight portions of octadecyl fumarate.
Through the technical scheme, the engine oil composition provided by the disclosure can meet the use requirements of engine lubricating oil, and particularly has a good effect on keeping certain emulsification stability and low-temperature performance.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The present disclosure provides an engine oil composition comprising, based on the total weight of the engine oil composition: 0.1-0.4 wt% of pour point depressant, 1.5-8.0 wt% of viscosity index improver, 1.79-3.93 wt% of detergent, 0.64-3.07 wt% of dispersant, 1.04-3.67 wt% of antioxidant, 0.01-5 wt% of friction reducer, 0.3-1.5 wt% of zinc dialkyl dithiophosphate and the balance of neutral base oil; the pour point depressant comprises a vinyl acetate-fumarate pour point depressant which comprises the following components in parts by weight: 0.4 to 0.6 weight portion of octal fumarate, 0.8 to 1.2 weight portions of dodecyl fumarate, 0.8 to 1.2 weight portions of tetradecyl fumarate, 0.8 to 1.2 weight portions of hexadecyl fumarate and 0.8 to 1.2 weight portions of octadecyl fumarate.
According to an embodiment of the present disclosure, the engine oil composition comprises, based on the total weight of the engine oil: 0.2-0.3 wt% of pour point depressant, 1.6-7.5 wt% of viscosity index improver, 2-3.9 wt% of detergent, 1.34-3 wt% of dispersant, 1.06-3.54 wt% of antioxidant, 0.5-1.2 wt% of antifriction agent, 0.4-1.2 wt% of zinc dialkyl dithiophosphate and the balance of neutral base oil.
According to one embodiment of the present disclosure, the neutral base oil is a group II or more neutral base oil having a viscosity index of more than 80, 50N to 500N.
According to an embodiment of the present disclosure, the viscosity index improver includes: at least one of ethylene propylene copolymer, polymethacrylate and hydrogenated styrene-diene copolymer; preferably hydrogenated styrene-diene copolymers;
the ethylene-propylene copolymer has a structure shown in a formula (1) or a formula (2), and the relative molecular weight is 40000-80000;
Figure BDA0003302544340000031
the structural formula of the polymethacrylate is shown as (3), the relative molecular weight is 70000-260000, wherein R is C10～C14The isomeric alkyl groups of (a);
Figure BDA0003302544340000032
according to one embodiment of the present disclosure, wherein the detergent is a salicylate and/or a sulfonate; the detergent is preferably a combination of salicylate and sulfonate, wherein the weight ratio of salicylate to sulfonate is 1: (0.2 to 0.5); more preferably, the detergent is a combination of calcium alkylsalicylate and calcium sulfonate.
According to an embodiment of the present disclosure, wherein the dispersant comprises at least one of a polyisobutylene succinimide ashless dispersant, a borated bis-polyisobutylene succinimide dispersant, and a high molecular weight ashless dispersant; preferably, the dispersant is a combination of at least two of polyisobutylene succinimide ashless dispersant, boronized bis-polyisobutylene succinimide dispersant and high molecular weight ashless dispersant, the dispersant composition including 13.9-23.5 wt% polyisobutylene succinimide ashless dispersant.
According to an embodiment of the present disclosure, wherein the friction reducer comprises molybdenum dialkyldithioformate (MoDTC) and/or molybdenum dialkyldithiophosphate.
According to one embodiment of the present disclosure, wherein the zinc dialkyldithiophosphate is preferably zinc octyldialkyldithiophosphate.
According to an embodiment of the present disclosure, wherein the antioxidant is at least one of a phenolic antioxidant and an amine antioxidant;
preferably, the antioxidant is a combination of a phenolic antioxidant and an amine antioxidant, wherein the weight ratio of the phenolic antioxidant to the amine antioxidant is 1: (0.5-2).
The invention is further illustrated by the following examples, but is not to be construed as being limited thereto.
The starting materials, reagents, instruments and equipment referred to in the examples of the present disclosure may be obtained by purchase, unless otherwise specified.
Raw materials and supplier conditions are shown in the following table:
raw material Suppliers of goods
Complexing agent (dispersant, detergent, antioxidant) Runlin-Union, Inc
Viscosity index improver LUBRIZOL Ltd.
Pour point depressant Runyin-Union, Inc., Yingchun Co., Ltd
Base oil, friction reducing agent, zinc dialkyldithiophosphate China petrochemical company Limited
Example 1
The composition comprises the following components in percentage by weight:
vinyl acetate-fumarate pour point depressant in specific proportion 0.1% by weight
Salicylate/sulfonate complex detergent 2% by weight
Ashless dispersant of polyisobutylene succinimide 1.35% by weight
Compound antioxidant (phenol type: amine type weight ratio ═ 1:1) 1.1% by weight
Viscosity index improver for hydrogenated styrene-diene copolymer 6.6% by weight
Zinc dialkyl dithiophosphate 1.34% by weight
Antifriction agent MoDTC 0.03% by weight
II. III, IV and V type 50N-500N neutral base oil arbitrary composition Balance of
The vinyl acetate-fumarate pour point depressant with the specific proportion comprises the following components: 0.5 part by weight of octal fumarate, 1 part by weight of tridecyl fumarate, 1 part by weight of tetradecyl fumarate, 1 part by weight of hexadecyl fumarate and 1 part by weight of octadecyl fumarate.
The preparation method comprises the following steps: mixing neutral base oil with a detergent, a dispersant, an antioxidant, a viscosity index improver, a pour point depressant and zinc dialkyl dithiophosphate at 50-60 ℃, uniformly stirring, adding an antifriction agent, mixing, and stirring for 2-3 hours to uniformly mix to obtain the engine oil composition.
Example 2
The composition comprises the following components in percentage by weight: the composition comprises the following components in percentage by weight:
Figure BDA0003302544340000051
Figure BDA0003302544340000061
the vinyl acetate-fumarate pour point depressant with the specific proportion comprises the following components: 0.5 part by weight of octal fumarate, 1 part by weight of tridecyl fumarate, 1 part by weight of tetradecyl fumarate, 1 part by weight of hexadecyl fumarate and 1 part by weight of octadecyl fumarate.
The preparation method is the same as that of example 1.
Example 3
The composition comprises the following components in percentage by weight: the composition comprises the following components in percentage by weight:
Figure BDA0003302544340000062
the vinyl acetate-fumarate pour point depressant with the specific proportion comprises the following components: 0.5 part by weight of octal fumarate, 1 part by weight of tridecyl fumarate, 1 part by weight of tetradecyl fumarate, 1 part by weight of hexadecyl fumarate and 1 part by weight of octadecyl fumarate.
The preparation method is the same as that of example 1.
Comparative example 1
This comparative example differs from example 1 only in that: a polymethacrylate pour point depressant is used to replace the vinyl acetate-fumarate pour point depressant in a specific ratio.
Comparative example 2
This comparative example differs from example 1 only in that: using octa-alcohol fumarate: lauryl fumarate: tetradecyl fumarate: cetyl fumarate: stearyl fumarate ═ 2: 1: 1: 2 weight percent of compounded vinyl acetate-fumaric acid ester replaces the polyisobutylene and the polymethacrylate.
Comparative example 3
This comparative example differs from example 1 only in that: 0.1% of emulsifier is added, and the pour point depressant is replaced by the polymethacrylate pour point depressant in the comparative example 1.
Test example
The compositions obtained in the examples and comparative examples were tested for their properties according to standard methods in the art and the results are shown in Table 1.
The detection method of the kinematic viscosity refers to GB/T265; emulsion retention test method ASTM D7563; pour point test method reference GB/T3535; the SRV frictional wear test detection method refers to ASTM D5707; the crankcase simulation test method refers to SH/T0300, and the oil temperature is 100 ℃; the plate temperature is 300 ℃; the test time is 3 h; and (4) intermittent.
Table 1: performance of lubricating oil composition
Figure BDA0003302544340000071
Figure BDA0003302544340000081
As can be seen from table 1, the engine oil composition provided by the present disclosure uses specific proportions of vinyl acetate-fumaric acid esters as pour point depressants, and the emulsion retention capability of the composition is significantly better than that of the engine oil composition using polymethacrylate as pour point depressants and an emulsifier in the prior art without adding an emulsifier, and the components in the engine oil composition provided by the present disclosure act synergistically to achieve good retention capability while ensuring low-temperature fluidity.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (10)

1. An engine oil composition comprising, based on total engine oil composition weight: 0.1-0.4 wt% of pour point depressant, 1.5-8.0 wt% of viscosity index improver, 1.79-3.93 wt% of detergent, 0.64-3.07 wt% of dispersant, 1.04-3.67 wt% of antioxidant, 0.01-5 wt% of friction reducer, 0.3-1.5 wt% of zinc dialkyl dithiophosphate and the balance of neutral base oil;
the pour point depressant comprises a vinyl acetate-fumarate pour point depressant which comprises the following components in parts by weight: 0.4 to 0.6 weight portion of octal fumarate, 0.8 to 1.2 weight portions of dodecyl fumarate, 0.8 to 1.2 weight portions of tetradecyl fumarate, 0.8 to 1.2 weight portions of hexadecyl fumarate and 0.8 to 1.2 weight portions of octadecyl fumarate.
2. The engine oil composition of claim 1, wherein the engine oil composition comprises, based on total engine oil weight: 0.2-0.3 wt% of pour point depressant, 1.6-7.5 wt% of viscosity index improver, 2-3.9 wt% of detergent, 1.34-3 wt% of dispersant, 1.06-3.54 wt% of antioxidant, 0.5-1.2 wt% of antifriction agent, 0.4-1.2 wt% of zinc dialkyl dithiophosphate and the balance of neutral base oil.
3. The engine oil composition of claim 1, wherein the neutral base oil is a group II or above neutral base oil having a viscosity index greater than 80, 50N to 500N.
4. The engine oil composition of claim 1, wherein the viscosity index improver comprises: at least one of ethylene propylene copolymer, polymethacrylate and hydrogenated styrene-diene copolymer; preferably hydrogenated styrene-diene copolymers;
the ethylene-propylene copolymer has a structure shown in a formula (1) or (2), and the relative molecular weight is 40000-80000;
Figure FDA0003302544330000021
the structural formula of the polymethacrylate is shown as (3), the relative molecular weight is 70000-260000, wherein R is C10-C14The isomeric alkyl groups of (a);
Figure FDA0003302544330000022
5. the engine oil composition of claim 1, wherein the detergent is a salicylate and/or sulfonate;
the detergent is preferably a combination of salicylate and sulfonate, wherein the weight ratio of salicylate to sulfonate is 1: (0.2 to 0.5); more preferably, the detergent is a combination of calcium alkylsalicylate and calcium sulfonate.
6. The engine oil composition of claim 1, wherein the dispersant comprises at least one of a polyisobutylene succinimide ashless dispersant, a borated bis-polyisobutylene succinimide dispersant, and a high molecular weight ashless dispersant; preferably, the dispersant is a combination of at least two of polyisobutylene succinimide ashless dispersant, boronized bis-polyisobutylene succinimide dispersant and high molecular weight ashless dispersant, the dispersant composition including 13.9-23.5 wt% polyisobutylene succinimide ashless dispersant.
7. The engine oil composition of claim 1, wherein the friction reducer comprises molybdenum dialkyl dithioates and/or molybdenum dialkyl dithiophosphates.
8. The engine oil composition of claim 1, wherein the zinc dialkyl dithiophosphate is preferably zinc butyl octyl dialkyl dithiophosphate.
9. The engine oil composition of claim 1, wherein the antioxidant is at least one of a phenolic antioxidant and an amine antioxidant.
10. The engine oil composition of claim 9, wherein the antioxidant is a combination of a phenolic antioxidant and an amine antioxidant, wherein the phenolic antioxidant and the amine antioxidant are present in a weight ratio of 1: (0.5-2).
CN202111194621.4A 2021-10-13 2021-10-13 Engine oil composition Pending CN113862064A (en)

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