CN113862061B - Lubricating grease composition, lubricating grease, and preparation method and application of lubricating grease - Google Patents
Lubricating grease composition, lubricating grease, and preparation method and application of lubricating grease Download PDFInfo
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- CN113862061B CN113862061B CN202111178000.7A CN202111178000A CN113862061B CN 113862061 B CN113862061 B CN 113862061B CN 202111178000 A CN202111178000 A CN 202111178000A CN 113862061 B CN113862061 B CN 113862061B
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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
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- 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
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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
- 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
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- 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
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- 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
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- 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)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Lubricants (AREA)
Abstract
The present disclosure relates to grease compositions, grease, methods of making, and uses thereof, the grease compositions comprising 12-hydroxystearic acid, liOH H 2 O, polymethyl acrylate, group III base oil, PAO base oil, p' -diisooctyldiphenylamine and benzotriazole, the content of the 12-hydroxystearic acid is 175 to 500 parts by weight, and the content of the LiOH.H. is relative to 1 part by weight of the benzotriazole 2 25-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyl diphenylamine; 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 adhesiveness, long service life and the like, and is suitable for being used as the lubricating grease of the washing machine speed reducer.
Description
Technical Field
The disclosure relates to the technical field of lubricating grease, and in particular relates to a lubricating grease composition, lubricating grease, a preparation method and application thereof.
Background
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 used is required to have the characteristics of long service life, low noise, environmental friendliness and the like.
The washing machine speed reducer is a planetary gear speed reducer, the material of the washing machine speed reducer is carbon steel and polyoxymethylene, and a steel-polyoxymethylene plastic friction pair has special requirements for a lubricant, and an extreme pressure additive does not act on the plastic, so that the friction pair is mainly used for reducing friction by increasing the thickness of an oil film, and the adhesion performance of grease is also enhanced because the surface adsorptivity of the grease on the plastic is lower.
Currently, some washing machines use general lithium-based grease or extreme pressure lithium-based grease as grease for lubrication of a speed reducer, and the grease for lubrication of the speed reducer has the following disadvantages: the base oil has low viscosity, and is not easy for gear damping so as to achieve the purpose of reducing motion noise; the extreme pressure lithium grease has a certain smell due to the extreme pressure additive, can influence the narrow environment, and has very small antifriction effect on the friction pair due to the steel-plastic friction pair. And the base oil used in the two grease products is common mineral oil, has a deep color, is easy to pollute clothes after leakage, and cannot ensure harmless to human bodies.
Disclosure of Invention
The lubricating grease composition has the advantages of light color, good adhesion, long service life and the like, and is suitable for being used as lubricating grease for a washing machine speed reducer.
To achieve the above object, a first aspect of the present disclosure provides a grease composition comprising 12-hydroxystearic acid, liOH H 2 O, polymethyl acrylate, group III base oil, PAO base oil, p' -diisooctyldiphenylamine and benzotriazole, the content of the 12-hydroxystearic acid is 175 to 500 parts by weight, and the content of the LiOH.H. is relative to 1 part by weight of the benzotriazole 2 25-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyl diphenylamineThe weight portions;
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.h 2 O, polymethyl acrylate, group III base oil, PAO base oil, p' -diisooctyldiphenylamine and benzotriazole, the content of the 12-hydroxystearic acid is 250 to 475 parts by weight, and the content of the LiOH.H. is relative to 1 part by weight of the benzotriazole 2 36-70 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1400-2450 parts by weight of III base oil, 1200-2150 parts by weight of PAO base oil and 8-23 parts by weight of p, p' -diisooctyl diphenylamine;
optionally, the 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 contains 8-11 wt% 12-hydroxystearic acid, based on the total weight of the grease composition, in weight percent;
optionally, the grease composition contains 35 to 45 wt.% PAO base oil, based on the total weight of the grease composition;
optionally, the grease composition contains 40-50 wt.% of a group III base oil, based on the total weight of the grease composition, in 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 H 2 The 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 mixed with the LiOH H 2 The 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 a first part of III-class base oil, heating to 70-90 ℃, and adding LiOH H 2 O, then reacting for 2.5-3h at 100-115 ℃;
s2, heating the obtained material to 160-175 ℃, and adding p, p' -diisooctyl diphenylamine, a second part of III base oil and a first part of PAO base oil;
s3, adding a second part of PAO base oil when the temperature of the obtained material is raised to 215-220 ℃;
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 aftertreatment.
Optionally, the weight ratio of the first portion of group III base oil to the second portion of group III base oil is (4-9): 1, a step of;
the weight ratio of the first portion of the PAO base oil, the second portion of the PAO base oil to 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 sequentially by using a filter screen with 80-200 meshes;
in step S5, the filtering includes: filtering sequentially by using a filter screen with 80-200 meshes; the post-processing includes: mixing, homogenizing and degassing.
Optionally, step S1 further includes: water was added to the system to control the temperature in the range of 100-115 ℃.
A third aspect of the present disclosure provides a grease prepared by the method of the second aspect of the present disclosure.
A fourth aspect of the present disclosure provides the use of a grease according to the third aspect of the present disclosure in a washing machine reducer.
Through the technical scheme, the III base oil and the PAO base oil are matched for use, the proportion of the III base oil and the PAO base oil is controlled, the prepared lubricating grease can be guaranteed to have the advantages of being good in oxidation stability, long in service life, light in color, thicker in oil film, friendly to the environment and the like, and the adhesion of the lubricating grease can be effectively improved by adding the polymethyl acrylate, so that the lubricating grease is suitable for being used as the lubricating grease of a washing machine speed reducer.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Detailed Description
The following describes specific embodiments of the present disclosure in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
The first aspect of the present disclosure provides a grease composition comprising 12-hydroxystearic acid, liOH H 2 O, polymethyl acrylate, group III base oil, PAO base oil, p' -diisooctyldiphenylamine and benzotriazole, the content of the 12-hydroxystearic acid is 175 to 500 parts by weight, and the content of the LiOH.H. is relative to 1 part by weight of the benzotriazole 2 25-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyl diphenylamine;
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, liOH H 2 O, polymethyl acrylate, III base oil, PAO base oil, p' -diisooctyl diphenylamine and benzotriazole, the content of 12-hydroxystearic acid is 250-475 parts by weight, liOH H, relative to 1 part by weight of benzotriazole 2 36-70 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1400-2450 parts by weight of III base oil, 1200-2150 parts by weight of PAO base oil and 8-23 parts by weight of p, p' -diisooctyl diphenylamine.
In one embodiment of the present disclosure, the polymethyl acrylate has a weight average molecular weight of 40000 to 60000; the PAO base oil has a viscosity index of 150 or more. The PAO base oil with higher viscosity index can enable the prepared lubricating grease to have higher adhesiveness and thicker oil film, avoid the gear from throwing off during high-speed operation, and simultaneously can play roles of damping and antifriction. 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 washing machine speed reducer runs at high rotation speed.
In one embodiment of the present disclosure, the grease composition contains 8 to 11 weight percent 12-hydroxystearic acid, based on the total weight of the grease composition, in 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 35 to 45 weight percent of the PAO base oil, based on the total weight of the grease composition; preferably 36-43 wt%.
In one embodiment of the present disclosure, the grease composition contains 40 to 50 weight percent of a group III base oil, based on the total weight of the grease composition, in weight percent; preferably 42 to 49% by weight.
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 oils, PAO30 base oils, liOH H 2 The 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 combined with LiOH H 2 The weight ratio of O is 1: (0.1-0.2). The III-class 10 base oil and the PAO30 base oil can meet the food-grade requirements, are nontoxic and harmless, have light color, and can avoid pollution to clothes after leakage. The proportion can ensure 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 a first part of III-class base oil, heating to 70-90 ℃, and adding LiOH H 2 O, then reacting for 2.5-3h at 100-115 ℃;
s2, heating the obtained material to 160-175 ℃, and adding p, p' -diisooctyl diphenylamine, a second part of III base oil and a first part of PAO base oil;
s3, adding a second part of PAO base oil when the temperature of the obtained material is raised to 215-220 ℃;
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 aftertreatment. The time of steps S2, S3 and S5 is not specifically required, and the stirring can be performed 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 present disclosure, the weight ratio of the first portion of group III base oil to the second portion of group III base oil is (4-9): 1, preferably (6-9): 1, a step of; the weight ratio of the first portion of the PAO base oil, the second portion of the PAO base oil to the third portion of the PAO base oil is (1.5-2.5): (1.5-3): 1, preferably (1.5-2): (2-3): 1. adding the base oil in portions and controlling the ratio of each addition can save energy, reduce oxidation of the base oil, and form a specific soap fiber structure.
In one embodiment of the present disclosure, in step S4, the filtering includes: filtering sequentially by using a filter screen with 80-200 meshes; in step S5, the filtering includes: the filtration was carried out using a 80-200 mesh sieve in sequence. The operation can effectively control the impurity content in the lubricating grease, and noise and abrasion caused by impurities are avoided.
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 in detail herein.
In one embodiment of the present disclosure, step S1 further includes: water was added to the system to control the temperature in the range of 100-115 ℃. The added water can evaporate in the subsequent preparation steps and does not remain in the grease and therefore does not affect the properties of the product.
A third aspect of the present disclosure provides a grease prepared by the method of the second aspect of the present disclosure.
A fourth aspect of the present disclosure provides the use of a grease according to the third aspect of the present disclosure in a washing machine reducer.
The raw materials used in examples 1 to 7 and comparative examples 1 to 3 of the present application were all commercially available.
Examples 1 to 7 illustrate greases of the application and methods of making the same
Example 1
The grease was prepared according to the contents of table 1 in parts by weight and using the following steps:
s1, mixing 12-hydroxystearic acid and a first part of III class 10 base oil, heating to 78 ℃, and adding LiOH H 2 O, then reacting for 3 hours at 100-110 ℃;
s2, heating the obtained material to 163 ℃, adding p, p' -diisooctyl diphenylamine, a second part of III type 10 base oil and a first part of PAO30 base oil, and uniformly stirring;
s3, adding the PAO30 base oil of the second part when the temperature of the obtained material is raised to 217 ℃, and uniformly stirring;
s4, cooling to 128 ℃, and filtering by using a filter screen with 80 meshes to 200 meshes in sequence;
s5, continuously cooling to 109 ℃, adding benzotriazole, polymethyl acrylate and a third part of PAO30 base oil, uniformly stirring, and filtering by a filter screen with 80 meshes to 200 meshes in sequence;
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 oils, PAO30 base oils, liOH H 2 The 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, a step of;
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 1.875:1.875:1.
example 2
Greases were prepared in the amounts 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, a step of; 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 in the amounts 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, a step of; 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 1.875:2.125:1.
example 4
Greases were prepared in the amounts 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, a step of; the weight ratio of the first portion of the PAO30 base oil, the second portion of the PAO30 base oil to the third portion of the PAO30 base oil is 1:2:1.
example 5
Greases were prepared in the amounts of 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
Greases were prepared in parts by weight according to the contents of table 1 and using the method of example 1, except that the weight average molecular weight of polymethyl acrylate was 70000.
Example 7
Greases were prepared in parts by weight according to the contents of table 1 and using the method of example 1, except for the group III 10 base oil, PAO30 base oil, liOH H 2 The 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
And universal lithium-based lubricating grease meeting international requirements is adopted (the base oil is lithium soap thickened I-type base oil, and polymethyl acrylate is not added).
Comparative example 3
Greases were prepared in parts by weight according to the contents of table 1 and using the method of example 1, except that polymethyl acrylate was not contained.
Performance tests were conducted on the above examples 1 to 7 and comparative examples 1 to 3, and the results are shown in Table 2.
TABLE 1
TABLE 2
As can be seen from the data in table 2, the grease disclosed by the present disclosure solves the disadvantages of deep color, thin oil film, insufficient adhesion, high impurity content, etc. of general lithium-based grease, and is suitable for use as a washing machine reducer grease; meanwhile, compared with general lithium-based lubricating grease, the service life of the washing machine speed reducer can be prolonged to a large extent.
The preferred embodiments of the present disclosure have been described in detail above, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (5)
1. A grease for use in a washing machine reducer, characterized in that the grease is prepared from a grease composition comprising 12-hydroxystearic acid, liOH H 2 O, polymethyl acrylate, group III base oil, PAO base oil, p' -diisooctyldiphenylamine and benzotriazole, the content of the 12-hydroxystearic acid is 175 to 500 parts by weight, and the content of the LiOH.H. is relative to 1 part by weight of the benzotriazole 2 25-75 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1000-2500 parts by weight of III base oil, 875-2250 parts by weight of PAO base oil and 5-25 parts by weight of p, p' -diisooctyl diphenylamine; the viscosity index of the PAO base oil is more than 150;
wherein the weight ratio of the PAO base oil to the group III base oil is (0.75-1.5): 1, wherein the III base oil is III 10 base oil, and the PAO base oil is PAO30 base oil; the weight average molecular weight of the polymethyl acrylate is 40000-60000; the group III 10 base oil, the PAO30 base oil, the LiOH H 2 The weight ratio of O to the 12-hydroxystearic acid is 1:(0.75-1.5)：(0.01-0.1)：(0.1-0.2)；
the grease composition comprises, in weight percent, based on the total weight of the grease composition, 8-11 wt.% 12-hydroxystearic acid, 35-45 wt.% PAO base oil and 40-50 wt.% group III base oil;
the method for preparing grease using the grease composition comprises the steps of:
s1, mixing 12-hydroxystearic acid and a first part of III-class base oil, heating to 70-90 ℃, and adding LiOH H 2 O, then reacting for 2.5-3h at 100-115 ℃;
s2, heating the obtained material to 160-175 ℃, and adding p, p' -diisooctyl diphenylamine, a second part of III base oil and a first part of PAO base oil;
s3, adding a second part of PAO base oil when the temperature of the obtained material is raised to 215-220 ℃;
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 aftertreatment;
wherein the weight ratio of the first portion of group III base oil to the second portion of group III base oil is (4-9): 1, a step of;
the weight ratio of the first portion of the PAO base oil, the second portion of the PAO base oil to the third portion of the PAO base oil is (1.5-2.5): (1.5-3): 1.
2. the grease of claim 1, wherein the grease composition comprises 12-hydroxystearic acid, liOH H 2 O, polymethyl acrylate, group III base oil, PAO base oil, p' -diisooctyldiphenylamine and benzotriazole, the content of the 12-hydroxystearic acid is 250 to 475 parts by weight, and the content of the LiOH.H. is relative to 1 part by weight of the benzotriazole 2 36-70 parts by weight of O, 12-60 parts by weight of polymethyl acrylate, 1400-2450 parts by weight of III base oil, 1200-2150 parts by weight of PAO base oil, and the pair of componentsThe content of the p-diisooctyl diphenylamine is 8-23 parts by weight.
3. The grease of claim 1 or 2, wherein the 12-hydroxystearic acid is in combination with the LiOH H 2 The weight ratio of O is 1: (0.1-0.2).
4. The grease of claim 1, wherein in step S4, the filtering comprises: filtering sequentially by using a filter screen with 80-200 meshes;
in step S5, the filtering includes: filtering sequentially by using a filter screen with 80-200 meshes; the post-processing includes: mixing, homogenizing and degassing.
5. The grease of claim 1, wherein step S1 further comprises: water was added to the system to control the temperature in the range of 100-115 ℃.
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Citations (3)
| 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 |
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2021
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Patent Citations (3)
| 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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