CN113862061A - Lubricating grease composition, lubricating grease, and preparation method and application thereof - Google Patents

Lubricating grease composition, lubricating grease, and preparation method and application thereof Download PDF

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Publication number
CN113862061A
CN113862061A CN202111178000.7A CN202111178000A CN113862061A CN 113862061 A CN113862061 A CN 113862061A CN 202111178000 A CN202111178000 A CN 202111178000A CN 113862061 A CN113862061 A CN 113862061A
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China
Prior art keywords
base oil
weight
pao
parts
grease composition
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CN113862061B (en
Inventor
曹玉发
王帅彪
赵海鹏
水琳
雷凌
张凯蛟
周少鹏
赵磊
许峥
冯会良
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China Petroleum and Chemical Corp
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China Petroleum and Chemical Corp
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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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/30—Driving arrangements 
    • 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
    • C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/125—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids
    • C10M2207/128—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of eight up to twenty-nine carbon atoms, i.e. fatty acids containing hydroxy groups; Ethers thereof
    • 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
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/02—Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06—Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
    • C10M2215/064—Di- and triaryl amines
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
    • C10M2215/22—Heterocyclic nitrogen compounds
    • C10M2215/223—Five-membered rings containing nitrogen and carbon only
    • 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
    • C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
    • C10N2030/64—Environmental friendly compositions
    • 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
    • C10N2050/00—Form in which the lubricant is applied to the material being lubricated
    • C10N2050/10—Semi-solids; greasy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Lubricants (AREA)

Abstract

The present disclosure relates to grease compositions comprising 12-hydroxystearic acid, LiOH H, grease, methods of making the same, and uses thereof2O, polymethyl acrylate, III-type base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of the 12-hydroxystearic acid is 175-500 parts by weight and the LiOH & H & lt/EN & gt is 1 part by weight of the benzotriazole225-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of group III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyldiphenylaminePreparing; wherein the weight ratio of the PAO base oil to the group III base oil is (0.75-1.5): 1. the prepared lubricating grease has the advantages of light color, good adhesion, long service life and the like, and is suitable for being used as lubricating grease for the reducer of the washing machine.

Description

Lubricating grease composition, lubricating grease, and preparation method and application thereof
Technical Field
The disclosure relates to the technical field of lubricating grease, and in particular relates to a lubricating grease composition, lubricating grease, and a preparation method and application thereof.
Background
Along with the improvement of the living standard of people, the performance requirements on household appliances are higher and higher, and the washing machine is one of the appliances which are highly concerned by people. Therefore, the grease is required to have the characteristics of long service life, low noise, environmental friendliness and the like.
The reducer of the washing machine is a planetary gear reducer which is made of carbon steel and polyformaldehyde, a steel-polyformaldehyde plastic friction pair has special requirements on a lubricant, and an extreme pressure additive does not act on plastics, so that the friction reduction of the friction pair mainly depends on increasing the thickness of an oil film, and the adhesion performance of lubricating grease is also enhanced because the lubricating grease has low adsorbability on the surface of the plastics.
Some current washing machines use a general-purpose lithium-based grease or an extreme pressure lithium-based grease as a grease for lubricating a decelerator, and these greases have the following disadvantages for the decelerator: the viscosity of the base oil is low, and the vibration of the gear is not easy to be reduced so as to achieve the purpose of reducing the motion noise; the extreme pressure lithium grease has certain smell and can affect narrow environment, and the extreme pressure lithium grease is a steel-plastic friction pair, so the extreme pressure lithium grease has very small antifriction effect on the friction pair. And the base oil used in the two lubricating grease products is common mineral oil, has dark color, is easy to pollute clothes after leakage, and cannot ensure no harm to human bodies.
Disclosure of Invention
The purpose of the present disclosure is to provide a grease composition, a grease, a preparation method and applications thereof, wherein the grease has the advantages of light color, good adhesion, long service life and the like, and is suitable for being used as a grease for a reducer of a washing machine.
To achieve the above object, the present disclosure provides, in a first aspect, a grease composition comprising 12-hydroxystearic acid, LiOH2O, polymethyl acrylate, III-type base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of the 12-hydroxystearic acid is 175-500 parts by weight and the LiOH & H & lt/EN & gt is 1 part by weight of the benzotriazole225-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of group III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyldiphenylamine;
wherein the weight ratio of the group III base oil to the PAO base oil is (0.75-1.5): 1.
optionally, the grease composition comprises 12-hydroxystearic acid, LiOH H2O, polymethyl acrylate, III-type base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of the 12-hydroxystearic acid is 250-475 parts by weight and the LiOH & H & lt/EN & gt is equivalent to 1 part by weight of the benzotriazole2The content of O is 36 to 70 weight portions, the content of polymethyl acrylate is 12 to 60 weight portions, the content of the III-type base oil is 1400-2450 weight portions, the content of the PAO base oil is 1200-2150 weight portions, and the content of the p, p' -diisooctyldiphenylamine is 8 to 23 weight portions;
optionally, the polymethyl acrylate has a molecular weight of 40000-60000; the viscosity index of the PAO base oil is more than 150;
optionally, the grease composition comprises 8-11 wt.% 12-hydroxystearic acid, based on the total weight of the grease composition;
optionally, the grease composition comprises, in weight percent, based on the total weight of the grease composition, 35 to 45 wt% of a PAO base oil;
optionally, the grease composition contains 40-50 wt.% of a group III base oil, based on the total weight of the grease composition, in terms of weight percent.
Optionally, the group III base oil is a group III 10 base oil and the PAO base oil is a PAO30 base oil; the group III 10 base oil, the PAO30 base oil, the LiOH H2The weight ratio of O to the 12-hydroxystearic acid is 1: (0.75-1.5): (0.01-0.1): (0.1-0.2);
alternatively, the 12-hydroxystearic acid is reacted with the LiOH H2The weight ratio of O is 1: (0.1-0.2).
A second aspect of the present disclosure provides a method of preparing a grease using the grease composition of the first aspect of the present disclosure.
Optionally, the method comprises the steps of:
s1, mixing 12-hydroxystearic acid and the first part of III base oil, heating to 70-90 ℃, and adding LiOH & H2O, then reacting for 2.5-3h at the temperature of 100-;
s2, heating the obtained material to 160-175 ℃, and adding p, p' -diisooctyldiphenylamine, a second part of III-type base oil and a first part of PAO base oil;
s3, when the temperature of the obtained material is raised to 215-220 ℃, adding a second part of PAO base oil;
s4, cooling to 120-140 ℃, and filtering;
s5, continuously cooling to 100-110 ℃, adding benzotriazole, polymethyl acrylate and a third part of PAO base oil, filtering and carrying out post-treatment.
Optionally, the weight ratio of the group III base oil of the first portion to the group III base oil of the second portion is (4-9): 1;
the weight ratio of the first portion of the PAO base oil, the second portion of the PAO base oil, and the third portion of the PAO base oil is (1.5-2.5): (1.5-3): 1.
optionally, in step S4, the filtering includes: filtering by using a filter screen of 80 meshes to 200 meshes in sequence;
in step S5, the filtering includes: filtering by using a filter screen of 80 meshes to 200 meshes in sequence; the post-processing comprises: mixing, homogenizing and degassing.
Optionally, step S1 further includes: water is added into the system to control the temperature within the range of 100 ℃ to 115 ℃.
A third aspect of the present disclosure provides a grease prepared using the method of the second aspect of the present disclosure.
A fourth aspect of the present disclosure provides use of the grease according to the third aspect of the present disclosure in a decelerator of a washing machine.
Through the technical scheme, the III-type base oil and the PAO base oil are matched for use, and the proportion of the III-type base oil and the PAO base oil is controlled, so that the prepared lubricating grease has the advantages of good oxidation stability, long service life, light color, thick oil film, environmental friendliness and the like, and the adhesion of the lubricating grease can be effectively improved by adding the polymethyl acrylate, and the lubricating grease is suitable for being used as the lubricating grease for the reducer of the washing machine.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present disclosure. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In a first aspect of the present disclosure, there is provided a grease composition comprising 12-hydroxystearic acid, LiOH2O, polymethyl acrylate, III-type base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of the 12-hydroxystearic acid is 175-500 parts by weight and the LiOH & H & lt/EN & gt is 1 part by weight of the benzotriazole2The content of O is 25-75 parts by weight, the content of polymethyl acrylate is 12-60 parts by weight, and the content of III base oil is 1000-25 parts by weight00 parts by weight, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyldiphenylamine;
wherein the weight ratio of the group III base oil to the PAO base oil is (0.75-1.5): 1.
in one embodiment of the present disclosure, the grease composition comprises 12-hydroxystearic acid, LiOH2O, polymethyl acrylate, III base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of 12-hydroxystearic acid is 250-475 parts by weight and LiOH & H & C, based on 1 part by weight of benzotriazole236-70 parts of O, 12-60 parts of polymethyl acrylate, 1400-2450 parts of III base oil, 1200-2150 parts of PAO base oil and 8-23 parts of p, p' -diisooctyldiphenylamine.
In one embodiment of the present disclosure, the weight average molecular weight of the polymethyl acrylate is 40000-60000; the viscosity index of the PAO base oil is more than 150. The PAO base oil with higher viscosity index is used, so that the prepared lubricating grease has higher adhesiveness and thicker oil film, the gear is prevented from being thrown and taken off during high-speed operation, and the effects of shock absorption and friction reduction can be achieved. And the polymethyl acrylate meeting the molecular weight range of the application can ensure that the adsorption capacity is not rapidly reduced due to shearing when the reducer of the washing machine runs at a high rotating speed.
In one embodiment of the present disclosure, the grease composition contains 8-11 wt.% 12-hydroxystearic acid, based on the total weight of the grease composition, in terms of weight percent.
In one embodiment of the present disclosure, the total content of PAO base oil and group III base oil in the grease composition is 80 to 90 wt.%, based on the total weight of the grease composition, in weight percent.
In one embodiment of the present disclosure, the grease composition contains, in weight percent, 35 to 45 weight percent, based on the total weight of the grease composition, of a PAO base oil; preferably 36 to 43% by weight.
In one embodiment of the present disclosure, the grease composition contains 40 to 50 weight percent, based on the total weight of the grease composition, of a group III base oil; preferably 42-49 wt%.
In one embodiment of the present disclosure, the group III base oil is a group III 10 base oil, and the PAO base oil is a PAO30 base oil; group III 10 base oil, PAO30 base oil, LiOH. H2The weight ratio of O to 12-hydroxystearic acid is 1: (0.75-1.5): (0.01-0.1): (0.1-0.2); preferably, 12-hydroxystearic acid is reacted with LiOH H2The weight ratio of O is 1: (0.1-0.2). The III-type 10 base oil and the PAO30 base oil can meet food-grade requirements, are non-toxic and harmless, are light in color, and can avoid polluting clothes after leakage. The proportion is matched for use, so that the prepared lubricating grease has good oxidation stability and longer service life.
A second aspect of the present disclosure provides a method of preparing a grease using the grease composition of the first aspect of the present disclosure.
In one embodiment of the present disclosure, the method comprises the steps of:
s1, mixing 12-hydroxystearic acid and the first part of III base oil, heating to 70-90 ℃, and adding LiOH & H2O, then reacting for 2.5-3h at the temperature of 100-;
s2, heating the obtained material to 160-175 ℃, and adding p, p' -diisooctyldiphenylamine, a second part of III-type base oil and a first part of PAO base oil;
s3, when the temperature of the obtained material is raised to 215-220 ℃, adding a second part of PAO base oil;
s4, cooling to 120-140 ℃, and filtering;
s5, continuously cooling to 100-110 ℃, adding benzotriazole, polymethyl acrylate and a third part of PAO base oil, filtering and carrying out post-treatment. The time of steps S2, S3 and S5 is not particularly required, and the mixture can be stirred uniformly. In another embodiment of the present disclosure, the first portion of the PAO base oil is added simultaneously with the second portion of the PAO base oil in step S2, i.e., no PAO base oil is added in step S3.
In one embodiment of the disclosure, the weight ratio of the group III base oil of the first portion to the group III base oil of the second portion is (4-9): 1, preferably (6-9): 1; the weight ratio of the first portion of the PAO base oil, the second portion of the PAO base oil, and the third portion of the PAO base oil is (1.5-2.5): (1.5-3): 1, preferably (1.5-2): (2-3): 1. the base oil is added in batches, and the proportion of each addition is controlled, so that energy can be saved, the base oil oxidation is reduced, and a specific soap fiber structure is formed.
In one embodiment of the present disclosure, in step S4, the filtering includes: filtering by using a filter screen of 80 meshes to 200 meshes in sequence; in step S5, the filtering includes: filtering by using a filter screen with 80 meshes to 200 meshes in sequence. The operation can effectively control the content of impurities in the lubricating grease, and avoid noise and abrasion caused by the impurities.
In one embodiment of the present disclosure, in step S5, the post-processing includes: mixing, homogenizing and degassing. This is conventional in the art and will not be described further herein.
In one embodiment of the present disclosure, step S1 further includes: water is added into the system to control the temperature within the range of 100 ℃ to 115 ℃. The added water can be evaporated in the subsequent preparation steps and can not remain in the lubricating grease, so that the performance of the product can not be influenced.
A third aspect of the present disclosure provides a grease prepared using the method of the second aspect of the present disclosure.
A fourth aspect of the present disclosure provides use of the grease according to the third aspect of the present disclosure in a decelerator of a washing machine.
The starting materials used in examples 1 to 7 and comparative examples 1 to 3 of the present application are commercially available.
Examples 1-7 illustrate greases and methods of making the same according to the present application
Example 1
Preparing grease according to the contents of table 1 and by the following steps:
s1, mixing 12-hydroxystearic acid and the first part of the III 10 base oil, and heating to the temperatureAdding LiOH & H at 78 deg.C2O, and then reacting for 3h at the temperature of 100-110 ℃;
s2, heating the obtained material to 163 ℃, adding p, p' -diisooctyldiphenylamine, the second part of III-type 10 base oil and the first part of PAO30 base oil, and uniformly stirring;
s3, when the temperature of the obtained material is raised to 217 ℃, adding a second part of PAO30 base oil, and uniformly stirring;
s4, cooling to 128 ℃, and filtering by using a filter screen of 80 meshes to 200 meshes in sequence;
s5, continuously cooling to 109 ℃, adding benzotriazole, polymethyl acrylate and PAO30 base oil of the third part, uniformly stirring, and sequentially filtering by using a filter screen of 80 meshes to 200 meshes;
s6, mixing, homogenizing and degassing to obtain the lubricating grease.
Wherein, the viscosity index of the PAO30 base oil is 151, and the weight-average molecular weight of the polymethyl acrylate is 50000;
group III 10 base oil, PAO30 base oil, LiOH. H2The weight ratio of O to 12-hydroxystearic acid is 1: 0.79: 0.027: 0.1875;
the weight ratio of the first portion of group III 10 base oil to the second portion of group III 10 base oil is 5: 1;
the weight ratio of the first portion of PAO30 base oil, the second portion of PAO30 base oil, and the third portion of PAO30 base oil was 1.875: 1.875: 1.
example 2
Greases were prepared according to the contents of table 1 and using the method of example 1, except that the weight ratio of the first part of group III 10 base oil to the second part of group III 10 base oil was 4.56: 1; the weight ratio of the first portion of PAO30 base oil, the second portion of PAO30 base oil, and the third portion of PAO30 base oil was 1.67: 1.67: 1.
example 3
Greases were prepared according to the contents of table 1 and using the method of example 1, except that the weight ratio of the first part of group III 10 base oil to the second part of group III 10 base oil was 9: 1; the weight ratio of the first portion of PAO30 base oil, the second portion of PAO30 base oil, and the third portion of PAO30 base oil was 1.875: 2.125: 1.
example 4
Greases were prepared according to the contents of table 1 and using the method of example 1, except that the weight ratio of the first part of group III 10 base oil to the second part of group III 10 base oil was 5: 1; the weight ratio of the first portion of PAO30 base oil, the second portion of PAO30 base oil, and the third portion of PAO30 base oil is 1: 2: 1.
example 5
Greases were prepared in the amounts indicated in Table 1 and using the method of example 1, except that the PAO base oil was a PAO20 base oil with a viscosity index of 145, in parts by weight.
Example 6
A grease was prepared in accordance with the contents of Table 1 in parts by weight and by the method of example 1, except that the weight average molecular weight of the polymethyl acrylate was 70000.
Example 7
Greases were prepared in the amounts indicated in Table 1 and by the method of example 1, except that the group III 10 base oil, the PAO30 base oil, and the LiOH H were used in parts by weight2The weight ratio of O to 12-hydroxystearic acid is 1: 0.79: 0.03: 0.22.
comparative example 1
Greases were prepared according to the contents of table 1 and using the method of example 1, except that the weight ratio of group III 10 base oil to PAO30 base oil was 0.69: 1.
comparative example 2
Universal lithium grease meeting international requirements is adopted (base oil is lithium soap thickened I base oil, and polymethyl acrylate is not added).
Comparative example 3
Greases were prepared in the amounts shown in Table 1 and using the method of example 1, except that polymethyl acrylate was not included, in parts by weight.
The above examples 1 to 7 and comparative examples 1 to 3 were subjected to the performance test, and the results are shown in Table 2.
TABLE 1
Figure BDA0003296262370000091
TABLE 2
Figure BDA0003296262370000092
Figure BDA0003296262370000101
According to the data in table 2, the lubricating grease disclosed by the invention overcomes the defects of deep color, thin oil film, insufficient adhesion, high impurity content and the like of the general lithium-based lubricating grease, and is suitable for serving as the lubricating grease for the reducer of the washing machine; meanwhile, compared with the general lithium-based lubricating grease, the service life of the reducer of the washing machine can be prolonged to a greater extent.
The preferred embodiments of the present disclosure have been described in detail above, however, the present disclosure 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 disclosure within the technical idea of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A grease composition characterized by comprising 12-hydroxystearic acid,LiOH·H2O, polymethyl acrylate, III-type base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of the 12-hydroxystearic acid is 175-500 parts by weight and the LiOH & H & lt/EN & gt is 1 part by weight of the benzotriazole225-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of group III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyldiphenylamine;
wherein the weight ratio of the PAO base oil to the group III base oil is (0.75-1.5): 1.
2. grease composition according to claim 1, wherein the grease composition comprises 12-hydroxystearic acid, LiOH H2O, polymethyl acrylate, III-type base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, wherein the content of the 12-hydroxystearic acid is 250-475 parts by weight and the LiOH & H & lt/EN & gt is equivalent to 1 part by weight of the benzotriazole2The content of O is 36 to 70 weight portions, the content of polymethyl acrylate is 12 to 60 weight portions, the content of the III-type base oil is 1400-2450 weight portions, the content of the PAO base oil is 1200-2150 weight portions, and the content of the p, p' -diisooctyldiphenylamine is 8 to 23 weight portions;
optionally, the weight average molecular weight of the polymethyl acrylate is 40000-60000; the viscosity index of the PAO base oil is more than 150;
optionally, the grease composition comprises 8-11 wt.% 12-hydroxystearic acid, based on the total weight of the grease composition;
optionally, the grease composition comprises, in weight percent, based on the total weight of the grease composition, 35 to 45 wt% of a PAO base oil;
optionally, the grease composition contains 40-50 wt.% of a group III base oil, based on the total weight of the grease composition, in terms of weight percent.
3. Grease composition according to claim 1 or 2, wherein the group III base oil is a group III 10 base oil and the PAO base oil is a PAO30 base oil;
alternatively, the group III 10 base oil, the PAO30 base oil, the LiOH H2The weight ratio of O to the 12-hydroxystearic acid is 1: (0.75-1.5): (0.01-0.1): (0.1-0.2);
alternatively, the 12-hydroxystearic acid is reacted with the LiOH H2The weight ratio of O is 1: (0.1-0.2).
4. A method of preparing a grease using the grease composition of any one of claims 1-3.
5. The method according to claim 4, wherein the method comprises the steps of:
s1, mixing 12-hydroxystearic acid and the first part of III base oil, heating to 70-90 ℃, and adding LiOH & H2O, then reacting for 2.5-3h at the temperature of 100-;
s2, heating the obtained material to 160-175 ℃, and adding p, p' -diisooctyldiphenylamine, a second part of III-type base oil and a first part of PAO base oil;
s3, when the temperature of the obtained material is raised to 215-220 ℃, adding a second part of PAO base oil;
s4, cooling to 120-140 ℃, and filtering;
s5, continuously cooling to 100-110 ℃, adding benzotriazole, polymethyl acrylate and a third part of PAO base oil, filtering and carrying out post-treatment.
6. The process of claim 5, wherein the weight ratio of the first portion of group III basestock to the second portion of group III basestock is (4-9): 1;
the weight ratio of the first portion of the PAO base oil, the second portion of the PAO base oil, and the third portion of the PAO base oil is (1.5-2.5): (1.5-3): 1.
7. the method of claim 5, wherein in step S4, the filtering comprises: filtering by using a filter screen of 80 meshes to 200 meshes in sequence;
in step S5, the filtering includes: filtering by using a filter screen of 80 meshes to 200 meshes in sequence; the post-processing comprises: mixing, homogenizing and degassing.
8. The method of claim 5, wherein step S1 further comprises: water is added into the system to control the temperature within the range of 100 ℃ to 115 ℃.
9. A grease prepared by the method of any one of claims 5 to 8.
10. Use of the grease according to claim 9 in a retarder for a washing machine.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102618368A (en) * 2012-02-21 2012-08-01 杭州得润宝油脂有限公司 Lubricating grease for hubs of heavy trucks and preparation method for lubricating grease
CN102959064A (en) * 2010-06-30 2013-03-06 雪佛龙美国公司 Lithium complex grease with improved thickener yield
CN112779073A (en) * 2021-01-05 2021-05-11 中国科学院兰州化学物理研究所 Prefabricated thickening agent containing nano zinc oxide and lubricating grease composition obtained by prefabricated thickening agent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102959064A (en) * 2010-06-30 2013-03-06 雪佛龙美国公司 Lithium complex grease with improved thickener yield
CN102618368A (en) * 2012-02-21 2012-08-01 杭州得润宝油脂有限公司 Lubricating grease for hubs of heavy trucks and preparation method for lubricating grease
CN112779073A (en) * 2021-01-05 2021-05-11 中国科学院兰州化学物理研究所 Prefabricated thickening agent containing nano zinc oxide and lubricating grease composition obtained by prefabricated thickening agent

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