CN112521998A - Low-noise polyurea lubricating grease composition and preparation method thereof - Google Patents
Low-noise polyurea lubricating grease composition and preparation method thereof Download PDFInfo
- Publication number
- CN112521998A CN112521998A CN201910876073.XA CN201910876073A CN112521998A CN 112521998 A CN112521998 A CN 112521998A CN 201910876073 A CN201910876073 A CN 201910876073A CN 112521998 A CN112521998 A CN 112521998A
- Authority
- CN
- China
- Prior art keywords
- butyl
- grease composition
- hydroxyphenyl
- tert
- formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- C10M119/00—Lubricating compositions characterised by the thickener being a macromolecular compound
- C10M119/24—Lubricating compositions characterised by the thickener being a macromolecular compound containing nitrogen
-
- 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
- C10M169/06—Mixtures of thickeners and additives
-
- 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
- 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
- C10M2215/065—Phenyl-Naphthyl 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
- C10M2217/00—Organic macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2217/04—Macromolecular compounds from nitrogen-containing monomers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2217/045—Polyureas; Polyurethanes
- C10M2217/0456—Polyureas; Polyurethanes used as thickening agents
-
- 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
- C10M2219/06—Thio-acids; Thiocyanates; Derivatives thereof
- C10M2219/062—Thio-acids; Thiocyanates; Derivatives thereof having carbon-to-sulfur double bonds
- C10M2219/066—Thiocarbamic type 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
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/084—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
Abstract
The invention provides a low-noise polyurea lubricating grease composition and a preparation method thereof, wherein the composition comprises the following components in parts by weight: 5-25 parts of a diurea thickener; 75-95 parts of base oil; 0.5-6 parts of a phenol derivative; 0.5-6 parts of octyl-N-phenyl-alpha-naphthylamine; 0.5-5 parts of methylene bis (n-butyl) dithiocarbamate. Compared with the prior lubricating grease, the lubricating grease composition obtained by the invention can obviously prolong the noise service life of a bearing under the high-temperature condition, and is particularly suitable for the lubricating grease with harsh low-noise requirements.
Description
Technical Field
The invention relates to the technical field of lubricating grease, and particularly relates to a low-noise polyurea lubricating grease composition and a preparation method thereof.
Background
The low-noise bearing is widely applied to automobile electrical appliances, household electrical appliances, industrial motors, electronic equipment, office equipment, precision instruments and the like, and the equipment has higher requirements on the generated noise, the service life and the service life under the low-noise state along with continuous innovation and application of the technology. The low noise performance of the grease is a factor that is far from negligible for the bearings, and the use of low noise grease enables a significant reduction in the noise emitted by the rolling bearing during operation, compared to the usual grease. For equipment, noise reduction means that a quieter environment can be created, and quiet use feeling and pleasant application experience can be brought to users, such as indoor or outdoor motors of air conditioners, refrigeration compressor motors of refrigerators, fan motors of smoke exhaust ventilators, bearings of cooling fans, ventilation fans of automobiles and motors of industrial equipment. The initial noise of the grease is a noise level at an early stage of operation and use in the rolling bearing into which the grease is injected. The noise life of the lubricating grease refers to the service life which is called as the noise life when the lubricating grease is injected into a rolling bearing to start running and use, the performance of the lubricating grease changes along with the prolonging of the service life and the noise begins to increase along with the change of the performance of the lubricating grease, and the noise increases to the extent that the requirements of human physiology and environment cannot be met in the use process of the lubricating grease. The initial noise of the grease is inherently important and the noise lifetime of the grease is by no means negligible for long term use and experience by the user. For some household appliances and industrial motors, the bearing with longer service noise life better meets the requirements of people on environment and health. The noise level of the bearing without long noise life exceeds the environmental limit before the bearing life is reached, and the auditory perception of people is influenced. Under the background of consumption upgrading and green environmental protection requirement great development, the trend of improving the lasting comfort level and durability of the applications of automobile electrical appliances, household electrical appliances, industrial motors, office equipment and the like is great.
Grease is the fifth major component of rolling bearings and is an intermediate medium separating the rolling elements and the channels. The normal operation of a rolling bearing and its reliance on a thin grease film formed within the bearing by grease, the properties of this grease film largely determine the initial noise of the rolling bearing and its noise life. The uniformity of the grease film formed by the grease determines the initial noise of the bearing, and the durability of this uniformity against aging changes during use determines the noise life of the bearing.
In the prior art, the problem of the noise service life of the bearing at a lower temperature section is relieved to a certain extent by optimizing the lithium-based grease. Patent document CN107148464A discloses a polyurea grease composition, which employs a polyurea thickened mineral oil and/or a synthetic hydrocarbon oil and is added with a metal deactivator, and the solution extends the bearing noise life to some extent compared with lithium-based grease. However, with the development of technology, the size reduction, weight reduction, and comfort of the device become mainstream, and the power-to-volume ratio is gradually increasing. This is accompanied by a continuous increase in the rotational speed of the bearings, which necessitates the bearings to operate at higher temperatures. The relationship between the service life of the grease and the working temperature conforms to the arrhenius equation, namely the service life of the grease is halved when the temperature rises by 15 ℃ in the range of the applicable temperature of the grease. The bearing has a longer requirement for noise life when operating at higher temperatures. Improvements and enhancements to the prior art are therefore necessary to meet the actual industry needs described above.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a low-noise polyurea lubricating grease composition and a preparation method thereof.
The invention aims to provide a low-noise polyurea lubricating grease composition which comprises the following components in parts by weight:
the lubricating grease composition further improves the noise life of the lubricating grease in a rolling bearing under high temperature conditions through the optimization of the specific structure of the thickening agent and the optimization of the base oil and the corresponding additives. The low-noise polyurea lubricating grease composition provided by the invention is particularly suitable for rolling bearings with strict low-noise requirements, and can remarkably prolong the service life in a low-noise state. Compared with the prior lubricating grease, the bearing noise service life can be obviously prolonged under the high-temperature condition.
According to some preferred embodiments of the present invention, the diurea thickener consists of compounds represented by formula (A) and formula (B),
wherein R is1、R2、R3And R4The groups are the same or different and are respectively and independently selected from an aromatic group with 6-7 carbon atoms and a straight chain or branched chain alkyl group with 8-18 carbon atoms.
According to some preferred embodiments of the present invention, the diurea thickener is a mixture composed of compounds represented by formula (a) and formula (B), and the molar ratio of the compound represented by formula (a) to the compound represented by formula (B) in the mixture is 1:3 to 7: 3.
According to some preferred embodiments of the present invention, the molar ratio of the aromatic group to the alkyl group in the diurea thickener is 1:9 to 1: 1. According to the invention, the diurea thickening agent can be prepared by reacting 4,4' -diphenylmethane diisocyanate and 2,4' -diphenylmethane diisocyanate together with an amine compound as a raw material, wherein the 2,4' -diphenylmethane diisocyanate accounts for 30-75% of the total isocyanate mole number. Preferably, the amine compound is aromatic amine and aliphatic amine, and the diurea thickener can be prepared by reacting aromatic amine and aliphatic amine with the isocyanate as raw materials, wherein the aromatic amine can be aniline, p-toluidine, N-xylidine and the like, and is preferably aniline or p-toluidine; the aliphatic amine can be selected from octylamine, decylamine, undecylamine, dodecylamine, tetradecylamine, pentadecylamine, hexadecylamine, octadecylamine and the like, and is preferably selected from one or more of octylamine, decylamine, dodecylamine, tetradecylamine, hexadecylamine and octadecylamine.
According to some preferred embodiments of the present invention, the base oil is selected from at least one of group II hydrogenated oil, group III hydrogenated oil, GTL oil, synthetic hydrocarbon, alkyl diphenyl ether oil, and ester oil.
According to some preferred embodiments of the present invention, the base oil is selected from at least two of group II hydrogenated oils, group III hydrogenated oils, GTL oils, synthetic hydrocarbon oils, alkyldiphenyl ether oils, and ester oils.
According to some preferred embodiments of the present invention, the base oil comprises at least 40 to 100 wt% ester oil. The group II hydrogenated oil, the group III hydrogenated oil, and the synthetic hydrocarbon oil meet API classification standards.
According to some preferred embodiments of the present invention, the phenolic derivative is pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ethyl ester sulfide; preferably, the phenol derivative is composed of pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether in a weight ratio of 1:2 to 5: 1.
According to the present invention, the phenol derivative in the low noise polyurea grease composition is pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] (represented by formula (C), hereinafter referred to as "compound C"), and bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate sulfide (represented by formula (D), hereinafter referred to as "compound D").
According to some preferred embodiments of the present invention, the polyurea grease composition has a formulation of:
the diurea thickening agent is a mixture composed of compounds shown in a formula (A) and a formula (B), and the weight ratio is 77-91 parts; the base oil comprises ester oil with the mass content of not less than 40 percent of the total base oil; the phenol derivative comprises 0.5-4 parts by weight of pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, 0.5-4 parts by weight of octyl-N-phenyl-alpha-naphthylamine and 0.5-4 parts by weight of methylene bis (di-N-butyl) dithiocarbamate.
The invention also aims to provide a preparation method of the polyurea lubricating grease composition, which comprises the following steps: respectively dissolving isocyanate and an amine compound by using a certain amount of base oil, wherein the dissolving temperature is 65-75 ℃, fully dissolving, then mixing and reacting the amine solution and the isocyanate solution, heating the materials to 80-100 ℃ for reaction, keeping the temperature for 20-40 minutes, then heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, stirring, cooling to 80-90 ℃, then adding methylene bis (di-N-butyl dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine, stirring and grinding.
The invention has the beneficial effects that: the low noise polyurea grease composition of the present invention significantly improves the noise life of the bearing at higher temperatures, for example, the time to maintain a low noise state at 150 ℃ exceeds 2000 hours. Since the life of the grease conforms to the description of the arrhenius equation, the life is halved for every 15 ℃. A better noise life expectancy can be obtained at lower temperatures. The low-noise polyurea lubricating grease composition is suitable for automobile electrical appliances, household electrical appliances, industrial motors, office equipment and the like, and can improve the lasting comfort level and the durability.
Detailed Description
The present invention is further illustrated by the following examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials added in the examples are commercially conventional raw materials unless otherwise specified.
Example 1
Grease sample of this example
Example 1 was prepared according to the formulation listed in table 1, with the amounts of the components being in parts by mass.
Preparation method of lithium grease of this example
Dissolving isocyanate and amine respectively by using equivalent base oil, wherein the dissolving temperature is 65-75 ℃, mixing and reacting the amine solution and the isocyanate solution after fully dissolving, heating the materials to 80-100 ℃, reacting for 30 minutes, continuously heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], uniformly stirring, cooling by switching, and adding methylene bis (N-butyl) dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine after cooling to 80-90 ℃. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Example 2
Grease sample of this example
Example 2 was prepared according to the formulation listed in table 1, with the amounts of the components being in parts by mass.
Preparation method of lithium grease of this example
Dissolving isocyanate and amine respectively by using equivalent base oil, wherein the dissolving temperature is 65-75 ℃, mixing and reacting the amine solution and the isocyanate solution after fully dissolving, heating the materials to 80-100 ℃, reacting for 30 minutes, continuously heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], uniformly stirring, cooling by switching, and adding methylene bis (N-butyl) dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine after cooling to 80-90 ℃. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Example 3
Grease sample of this example
Example 3 was prepared according to the formulation listed in table 1, wherein the amounts of the components are parts by mass.
Preparation method of lithium grease of this example
Respectively dissolving isocyanate and amine by using equivalent base oil, wherein the dissolving temperature is 65-75 ℃, fully dissolving, then mixing and reacting the amine solution and the isocyanate solution, heating the materials to 80-100 ℃, reacting for 30 minutes, then continuing heating, heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, uniformly stirring, then switching to cool, cooling to 80-90 ℃, and adding methylene bis (N-butyl dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Example 4
Grease sample of this example
Example 4 was prepared according to the formulation listed in table 1, wherein the amounts of the components are parts by mass.
Preparation method of lithium grease of this example
Respectively dissolving isocyanate and amine by using equivalent base oil, wherein the dissolving temperature is 65-75 ℃, fully dissolving, then carrying out mixed reaction on the amine solution and the isocyanate solution, heating the materials to 80-100 ℃, reacting for 30 minutes, then continuing heating, heating to 120-140 ℃, adding bis (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, uniformly stirring, then switching to cooling, cooling to 80-90 ℃, and adding methylene bis (N-butyl) dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Example 5
Grease sample of this example
Example 5 was prepared according to the formulation listed in table 1, with the amounts of the components being in parts by mass.
Preparation method of lithium grease of this example
Respectively dissolving isocyanate and amine by using equivalent base oil, wherein the dissolving temperature is 65-75 ℃, fully dissolving, then mixing and reacting the amine solution and the isocyanate solution, heating the materials to 80-100 ℃, reacting for 30 minutes, then continuing heating, heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, uniformly stirring, then switching to cool, cooling to 80-90 ℃, and adding methylene bis (N-butyl dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Example 6
Grease sample of this example
Example 6 was prepared according to the formulation listed in table 1, wherein the amounts of the components are parts by mass.
Preparation method of lithium grease of this example
Dissolving isocyanate and amine respectively by using equivalent base oil, wherein the dissolving temperature is 65-75 ℃, mixing and reacting the amine solution and the isocyanate solution after fully dissolving, heating the materials to 80-100 ℃, reacting for 30 minutes, continuously heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], uniformly stirring, then switching to cooling, cooling to 80-90 ℃, and adding methylene bis (N-butyl) dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Example 7
Grease sample of this example
The examples were prepared according to the formulations listed in table 1, wherein the amounts of the components are in parts by mass.
Preparation method of lithium grease of this example
Respectively dissolving isocyanate and amine by using equivalent base oil, mixing at the dissolving temperature of 65-75 ℃, carrying out mixed reaction on an amine solution and an isocyanate solution, heating the materials to 80-100 ℃, reacting for 30 minutes, continuing heating to 120-140 ℃, adding bis (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, uniformly stirring, switching to cool, cooling to 80-90 ℃, and adding methylene bis (di-N-butyl) dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine. Stirring evenly, and grinding for three times by a three-roller machine to obtain a finished product.
Comparative example 1
Grease sample of this comparative example
Comparative examples were prepared according to the formulations listed in table 1, with the amounts of the components being in parts by mass.
Preparation method of lithium grease of this example
Respectively dissolving isocyanate and amine by using equivalent base oil, mixing at the dissolving temperature of 65-75 ℃, carrying out mixed reaction on an amine solution and an isocyanate solution, heating the materials to 80-100 ℃, reacting for 30 minutes, continuing heating to 120-140 ℃, adding 2, 5-bis (alkyl dithio) -1,3, 4-thiadiazole and diphenylamine, uniformly stirring, and grinding for three times by using a three-roll machine to obtain a finished product.
Test examples
Evaluation tests were conducted for examples 1 to 7 and comparative examples (test results are shown in Table 1).
(1) Noise life test
The test conditions and evaluation criteria of this test example are as follows: a608-2 RZ bearing was used, and a noise life test was conducted on a test machine with a grease injection amount of 0.16 g. The test conditions were: the temperature of the outer ring of the bearing is 150 ℃, the speed of the bearing is 5600 r/min, the axial load is 19.6N, and the test time is 2000 hours. Stopping the test after 2000 hours, taking down the test bearing, measuring the vibration value of the test bearing by using an S0910 bearing vibration measuring instrument, wherein the judgment standard of the noise life of the lubricating grease is as follows: the bearing vibration value is qualified when being less than or equal to 30dB and is represented by the square root; the bearing vibration value greater than 30dB is rejected as "X".
(2) Bearing initial vibration value test
The initial vibration value of the bearing is measured by a bearing vibration measuring instrument S0910, a 608-2RZ bearing is adopted, and the grease injection amount is 0.16 g.
(3) Oxidative induction phase test
The oxidation induction period (OIT) of the lubricating grease is tested by an SH/T0790 lubricating grease oxidation induction period measuring method (differential scanning calorimetry). The test is carried out by heating a thin layer of grease sample in an aluminum sample cell under a protective atmosphere, introducing high-pressure oxygen at a constant temperature to oxidize the grease sample, measuring the heat release of the grease due to the oxidation reaction by a differential thermal scanning method, and recording the time of the grease sample undergoing rapid oxidation heat release, wherein the time is the oxidation induction period (OIT) which is an index for measuring the oxidation stability of the grease. The test conditions were as follows, test temperature: at 210 ℃; oxygen pressure: 3.5MPa, oxygen flow: 100 mL/min.
(4) Drop point test for greases
The invention adopts a GB/T3498 wide temperature range dropping point measuring method to measure the dropping point of the lubricating grease.
Table 1 grease formulations and evaluation test results
In Table 1, pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], as shown in formula (C), is hereinafter referred to as "Compound C". Bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ethyl ester thioether is shown as a formula (D), and is hereinafter referred to as a compound D. Methylenebis (di-n-butyl) dithiocarbamate, hereinafter referred to as "compound E".
As can be seen from a comparison of the examples and comparative examples, the low noise polyurea grease composition of the present invention can significantly improve the noise life of the bearing and achieve lower initial bearing vibration noise. The evaluation results of the low noise polyurea lubricating grease composition examples of the invention in the noise life test under high temperature conditions were all passed. The low-noise polyurea lubricating grease composition has excellent oxidation resistance and dropping point.
The examples are intended to illustrate the invention in more detail, but the invention is not limited to the examples described above.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A low-noise polyurea lubricating grease composition comprises base oil and is characterized by comprising the following components in parts by weight:
2. the polyurea grease composition of claim 1 wherein the diurea thickener is comprised of compounds represented by formula (A) and formula (B),
wherein R is1、R2、R3And R4The groups are the same or different and are respectively and independently selected from an aromatic group with 6-7 carbon atoms and a straight chain or branched chain alkyl group with 8-18 carbon atoms.
3. The polyurea grease composition according to claim 2, wherein the diurea thickener is a mixture of compounds represented by formula (A) and formula (B), and the molar ratio of the compound represented by formula (A) to the compound represented by formula (B) in the mixture is 1:3 to 7: 3.
4. The polyurea grease composition according to claim 2 or 3, wherein the molar ratio of the aromatic group to the alkyl group in the diurea thickener is 1:9 to 1: 1.
5. The polyurea grease composition of claim 1 wherein the base oil is selected from at least one of group II hydrogenated oil, group III hydrogenated oil, GTL oil, synthetic hydrocarbon, alkyldiphenyl ether oil, and ester oil.
6. The polyurea grease composition of claim 5 wherein the base oil is selected from at least two of the group consisting of group II hydrogenated oils, group III hydrogenated oils, GTL oils, synthetic hydrocarbon oils, alkyldiphenyl ether oils, and ester oils.
7. The polyurea grease composition of claim 5 or 6, wherein the base oil comprises at least 40 to 100 wt% ester oil.
8. The polyurea grease composition according to claim 1, wherein the phenolic derivative is pentaerythritol tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ethyl ester sulfide; preferably, the phenol derivative is composed of pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether in a weight ratio of 1:2 to 5: 1.
9. The polyurea grease composition according to any one of claims 1 to 8, characterized in that,
the formula of the polyurea lubricating grease composition is as follows:
the diurea thickening agent is a mixture composed of compounds shown in a formula (A) and a formula (B), and the weight ratio is 77-91 parts; the base oil comprises ester oil with the mass content of not less than 40 percent of the total base oil; the phenol derivative comprises 0.5-4 parts by weight of pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, 0.5-4 parts by weight of octyl-N-phenyl-alpha-naphthylamine and 0.5-4 parts by weight of methylene bis (di-N-butyl) dithiocarbamate.
10. A method of preparing a polyurea lubricating grease composition according to any one of claims 1-9, comprising the steps of: respectively dissolving isocyanate and an amine compound by using a certain amount of base oil, wherein the dissolving temperature is 65-75 ℃, fully dissolving, then mixing and reacting the amine solution and the isocyanate solution, heating the materials to 80-100 ℃ for reaction, keeping the temperature for 20-40 minutes, then heating to 120-140 ℃, adding pentaerythritol-tetrakis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or bis 3- (3, 5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate thioether, stirring, cooling to 80-90 ℃, then adding methylene bis (di-N-butyl dithiocarbamate and octyl-N-phenyl-alpha-naphthylamine, stirring and grinding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876073.XA CN112521998B (en) | 2019-09-17 | 2019-09-17 | Low-noise polyurea lubricating grease composition and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910876073.XA CN112521998B (en) | 2019-09-17 | 2019-09-17 | Low-noise polyurea lubricating grease composition and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112521998A true CN112521998A (en) | 2021-03-19 |
| CN112521998B CN112521998B (en) | 2022-08-16 |
Family
ID=74974740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910876073.XA Active CN112521998B (en) | 2019-09-17 | 2019-09-17 | Low-noise polyurea lubricating grease composition and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112521998B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0277494A (en) * | 1988-09-14 | 1990-03-16 | Showa Shell Sekiyu Kk | Urea grease composition improved in acoustic performance |
| JP2000248290A (en) * | 1999-03-03 | 2000-09-12 | Kyodo Yushi Co Ltd | Preparation of urea grease excellently low in noise |
| US20040167045A1 (en) * | 2003-02-20 | 2004-08-26 | Ward Carl E. | Low noise grease gelling agents |
| CN101189321A (en) * | 2005-04-28 | 2008-05-28 | 国际壳牌研究有限公司 | Lubricating grease composition |
| US20100105586A1 (en) * | 2007-06-20 | 2010-04-29 | Bodesheim Guenther | Lubricating grease composition |
| CN102002414A (en) * | 2010-10-13 | 2011-04-06 | 中国石油化工股份有限公司 | Polyurea lubricating grease composition |
| CN102300970A (en) * | 2008-12-17 | 2011-12-28 | 雪佛龙奥伦耐有限责任公司 | Lubricating Oil Compositions |
| JP2013060551A (en) * | 2011-09-14 | 2013-04-04 | Klueber Lubrication Muenchen Kg | Lubricating grease composition |
| CN105419919A (en) * | 2015-11-30 | 2016-03-23 | 中山大学惠州研究院 | Low-noise polyurea lubricating grease and preparation method thereof |
| JP2016141803A (en) * | 2015-02-05 | 2016-08-08 | 出光興産株式会社 | Urea grease |
| CN107406791A (en) * | 2014-12-17 | 2017-11-28 | 慕尼黑克吕伯尔润滑器股份两合公司 | High-temperature lubricant |
-
2019
- 2019-09-17 CN CN201910876073.XA patent/CN112521998B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0277494A (en) * | 1988-09-14 | 1990-03-16 | Showa Shell Sekiyu Kk | Urea grease composition improved in acoustic performance |
| JP2000248290A (en) * | 1999-03-03 | 2000-09-12 | Kyodo Yushi Co Ltd | Preparation of urea grease excellently low in noise |
| US20040167045A1 (en) * | 2003-02-20 | 2004-08-26 | Ward Carl E. | Low noise grease gelling agents |
| CN101189321A (en) * | 2005-04-28 | 2008-05-28 | 国际壳牌研究有限公司 | Lubricating grease composition |
| US20100105586A1 (en) * | 2007-06-20 | 2010-04-29 | Bodesheim Guenther | Lubricating grease composition |
| CN102300970A (en) * | 2008-12-17 | 2011-12-28 | 雪佛龙奥伦耐有限责任公司 | Lubricating Oil Compositions |
| CN102002414A (en) * | 2010-10-13 | 2011-04-06 | 中国石油化工股份有限公司 | Polyurea lubricating grease composition |
| JP2013060551A (en) * | 2011-09-14 | 2013-04-04 | Klueber Lubrication Muenchen Kg | Lubricating grease composition |
| CN107406791A (en) * | 2014-12-17 | 2017-11-28 | 慕尼黑克吕伯尔润滑器股份两合公司 | High-temperature lubricant |
| JP2016141803A (en) * | 2015-02-05 | 2016-08-08 | 出光興産株式会社 | Urea grease |
| CN105419919A (en) * | 2015-11-30 | 2016-03-23 | 中山大学惠州研究院 | Low-noise polyurea lubricating grease and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| MATSUBARA,K: "Low noise greases for bearings", 《NLGI SPOKESMAN》 * |
| 冯强等: "氧化劣化对锂基润滑脂噪声寿命的影响", 《轴承》 * |
| 刘磊等: "聚脲润滑脂的研究进展", 《化工进展》 * |
| 李小红: "低噪音聚脲润滑脂的研制及摩擦学性能研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技I辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112521998B (en) | 2022-08-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2135927A1 (en) | Grease composition and bearing | |
| JP4968825B2 (en) | Grease composition for pivot assembly bearings and pivot assembly bearings containing the grease composition | |
| KR101245687B1 (en) | Grease Composition and Bearings | |
| US20080305973A1 (en) | Lithium Grease Composition Sealed in a Small Motor Bearing to Reduce Noise | |
| CN102504921A (en) | Polyurea-based grease additive composition | |
| JP7434953B2 (en) | Grease compositions and rolling bearings | |
| CN111575093A (en) | Aluminum plate strip cold rolling oil, preparation method and application | |
| US20090029881A1 (en) | Heat resistant lithium grease composition and a small motor reduced noise bearing | |
| WO2013125510A1 (en) | Grease and method for softening grease | |
| CN112521998B (en) | Low-noise polyurea lubricating grease composition and preparation method thereof | |
| CN111876218B (en) | Conductive bearing lubricating grease composition and preparation method thereof | |
| CN111073744B (en) | Electric vehicle leakage-resistant and heat-dissipation high-temperature transmission gear oil and preparation method thereof | |
| JP4162326B2 (en) | Lubricant composition and rolling bearing using the same | |
| CN115772437A (en) | High-low temperature universal optical instrument oil | |
| JP2007186578A (en) | Grease composition and roll bearing | |
| CN103275799A (en) | Stokehole roller way lubricating grease and preparation method thereof | |
| CN113637515A (en) | Low-noise composite calcium sulfonate-based lubricating grease composition and preparation method thereof | |
| KR101813238B1 (en) | Grease Composition For Constant Velocity Joints and Preparing Method thereof | |
| EP4047075A1 (en) | Grease composition for speed reducer part of on-vehicle electric component | |
| EP2554639A1 (en) | Lubricating oil composition | |
| US8722598B2 (en) | Grease composition for bearings with improved heat-resistant acoustic life | |
| JP6905921B2 (en) | Grease composition | |
| CN112522005A (en) | Lubricating grease composition for electric automobile driving motor and preparation method thereof | |
| CN115305136B (en) | High-temperature chain oil with excellent adhesive property and preparation method thereof | |
| CN107828486B (en) | Lubricating oil and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |