CN112375606A - Low-odor automobile switch lubricating grease composition and preparation method thereof - Google Patents
Low-odor automobile switch lubricating grease composition and preparation method thereof Download PDFInfo
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- CN112375606A CN112375606A CN202011236879.1A CN202011236879A CN112375606A CN 112375606 A CN112375606 A CN 112375606A CN 202011236879 A CN202011236879 A CN 202011236879A CN 112375606 A CN112375606 A CN 112375606A
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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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- 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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
- C10M2201/042—Carbon; Graphite; Carbon black halogenated, i.e. graphite fluoride
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/061—Carbides; Hydrides; Nitrides
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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
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/10—Compounds containing silicon
- C10M2201/105—Silica
- C10M2201/1056—Silica used as thickening agents
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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
- 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
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms 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
- C10M2213/00—Organic macromolecular compounds containing halogen as ingredients in lubricant compositions
- C10M2213/06—Perfluoro polymers
- C10M2213/062—Polytetrafluoroethylene [PTFE]
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention provides a low-odor automobile switch lubricating grease composition which comprises the following components in parts by weight: 62-93 parts of base oil, 5-20 parts of a thickening agent and 2-18 parts of a solid lubricant. The invention also discloses a preparation method of the low-odor automobile switch lubricating grease composition. The low-odor automobile switch lubricating grease composition prepared by thickening the poly-alpha olefin base oil by adopting the fumed silica and adding the solid lubricant has extremely low odor grade. Through VS-01.00-L-06005-A1-2018 & lt in-vehicle nonmetal material odor test specification & gt, the odor grade is 1.0-1.5 grade, and the odor is reduced by 1 grade and above compared with that of the lubricating grease in the prior art. The lubricating grease composition for the automobile switch disclosed by the invention also has good colloidal stability, wear resistance and friction reduction, shear resistance and excellent high and low temperature performance, and is suitable for lubricating and protecting various switches and lubricating various parts of an automobile cab.
Description
Technical Field
The invention relates to the technical field of low-odor lubricating grease, in particular to a low-odor automobile switch lubricating grease composition and a preparation method thereof.
Background
The automobile switch is a device for controlling the power supply of an electric appliance, switching on and off signals and adjusting the magnitude of current signals. The whole vehicle switch is divided into four types of switches according to the position and function requirements on the vehicle, namely a steering column switch assembly, a switch assembly on a door guard plate, a switch assembly on an instrument plate and a contact type switch assembly. There are more than ten categories such as an ignition switch, a cruise switch, a rearview mirror switch, a glass lifting switch, a headlight switch, an air conditioner switch, etc. according to the application.
The automobile switch mainly comprises a cover plate, a sliding block, a spring point, a contact piece, a base and the like, and the working principle is that under the action of specified external force, an ejector rod or the sliding block moves linearly or in a reciprocating mode within a certain range to push the contact to be closed (or opened), and once the external force disappears, the contact is automatically reset by a self counter-force spring to keep the original state.
The lubricating grease is used at the operating parts of a push rod, a slide block, a contact piece and the like of the switch, and has the functions of preventing jamming, improving hand feeling, prolonging the service life of the switch and the like. Meanwhile, according to the GB/T27630-2011 'evaluation guideline for quality of air in a passenger car' and the requirements of various car manufacturers on the smell of non-metallic materials in the car, the following requirements are provided for the performance of the automobile switch lubricating grease:
(1) the excellent lubricity makes the switch smooth and smooth in operation, and the hand feeling is comfortable.
(2) Good low temperature, and can meet the normal use in low cold areas through a low temperature test of a switch at minus 40 ℃.
(3) Excellent mechanical stability and colloid stability, no loss, no diffusion, no solidification and no pollution to the switch panel in the use process.
(4) No toxicity, low smell and smell grade less than or equal to 2.5.
(5) Extremely long service life, and the required switch service life reaches 20 ten thousand times or even more than 50 ten thousand times, even lifetime.
(6) Has better compatibility to plastic and rubber parts. The swelling, cracking and deformation of plastic and rubber parts can not be caused.
According to VS-01.00-L-06005-A1-2018, odor test specification of nonmetallic materials in vehicles, the judgment standard of the odor intensity of the lubricating grease is classified into 1 to 6 grades under the condition of 65 ℃ for 2h, and the odor intensity can be evaluated according to 0.5 unit: grade 1-not easily perceptible; grade 2 — perceptible (mild), but not irritating; grade 3-perceptible (intense), but not pungent; grade 4-sharp nose; grade 5-very pungent; grade 6 — intolerable.
At present, the low-odor lubricating grease used for automobile switches is not reported in related documents, and most manufacturers use some common lubricating grease. In some high-end vehicle types, the matched automobile switches use some imported synthetic base oil lubricating grease such as Germany Kenuber, American Dow Corning and Japanese Xinyue. With respect to the low-odor grease for automobile interior parts, CN109054934A reports a low-odor grease for automobile seat power slide rails. The thickening agent of the composition is lithium dodecahydroxy stearate and polytetrafluoroethylene powder, the base oil is poly alpha-olefin oil, and the odor grade of the composition is 2.5 grade; CN109161430A reports a low-odor rope-wheel type electric glass lifter grease, in which the thickening agents are lithium dodecahydroxystearate and polyethylene, and the base oil is also poly-alpha-olefin oil. The odor grade was also grade 2.5.
The grease currently used in automobile switches mainly has the following problems:
1) the low temperature is poor, and the switch is reset slowly at minus 40 ℃;
2) easy to be stuck and bad in hand feeling;
3) easy diffusion and pollution to the switch panel;
4) and the odor is large and cannot meet the odor requirement of less than or equal to 2.5 grade.
Disclosure of Invention
Aiming at the defects in the prior art, the low-odor automobile switch lubricating grease composition and the preparation method thereof are provided, the low-odor automobile switch lubricating grease prepared by the invention is tested by VS-01.00-L-06005-A1-2018 & lt odor test specification of non-metallic materials in automobiles, the odor grade is evaluated to be 1.0-1.5 grade under the test condition of 65 ℃ for 2h, the requirement that the odor grade of the lubricating grease used in passenger automobiles is less than or equal to 2.5 grade is met, and the lubricating performance, noise reduction and protection performance of more than ten kinds of switches such as automobile steering wheel combination switches, ignition switches, cruise switches, glass lifting switches, lamp system switches and air conditioner switches are completely met.
The first purpose of the invention is realized by the following technical scheme:
a low-odor automobile switch lubricating grease composition is characterized in that besides a normal lubricating function, selected components are evaluated to have an odor grade of less than or equal to 2.5 grade under the condition of a 65-DEG C x 2h test carried out by VS-01.00-L-06005-A1-2018 & lt specification of odor test of nonmetallic materials in automobiles, and the composition comprises the following components in parts by weight:
62-93 parts of base oil
5-20 parts of thickening agent
2-18 parts of a solid additive.
Furthermore, the base oil adopts poly alpha-olefin oil, the poly alpha-olefin oil is polymer of decene oligomerization, and the technical parameters are as follows: kinematic viscosity at 40 ℃ of 29-110mm2The flash point is more than or equal to 220 ℃, the pour point is less than or equal to minus 45 ℃, and the color and the smell are colorless; has excellent high and low temperature performance, and can meet the requirements of low odor and high and low temperature performance of the low odor automobile switch lubricating grease composition.
Further, the thickening agent has a specific surface area of 150-400 m2One or two of hydrophilic or hydrophobic fumed silica are combined, the preferable scheme is the mixture of hydrophilic and hydrophobic fumed silica, and the mass percentage of the hydrophobic fumed silica is 25-75%. The advantage of the preferred scheme is that the advantages of good anti-shearing performance of hydrophobic gas phase method silicon dioxide and excellent stability of hydrophilic gas phase method silicon dioxide colloid are fully utilized, so that the prepared low-odor automobile switch lubricating grease composition has strong high-temperature consistency maintaining capability, good anti-shearing performance and stable colloid structure.
Further, the solid additive is one or a combination of more of polytetrafluoroethylene micro powder, boron nitride or graphite fluoride.
Furthermore, the average grain diameter of the polytetrafluoroethylene micro powder is 5 microns, and the whiteness is not less than 95.
Furthermore, the boron nitride is in a hexagonal crystal form, the purity of the boron nitride is more than or equal to 99%, and the average grain diameter of the boron nitride is 10 microns.
Furthermore, the graphite fluoride is of a lamellar structure, the average grain diameter is 8-10 microns, and the fluorine-carbon ratio is more than or equal to 1.20.
The second purpose of the invention is realized by the following technical scheme:
the preparation method of the low-odor automobile switch lubricating grease composition is characterized by comprising the following steps of: the method comprises the following steps:
1) firstly, the used reaction kettle, the three-roller grinding machine and other preparation tools are cleaned, so that other impurities are prevented from being mixed, and the odor and the performance of the low-odor automobile switch lubricating grease composition are prevented from being influenced
2) Adding the base oil into a reaction kettle, heating and stirring to 80 +/-5 ℃, slowly adding a thickening agent, stirring for 30 +/-5 minutes, then adding a solid additive, stirring at constant temperature, vacuumizing and dispersing for 120 +/-10 minutes, wherein the vacuum degree is less than or equal to-0.06 MPa, and discharging into a barrel.
3) Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition.
The invention has the following beneficial effects:
1. the low-odor automobile switch lubricating grease composition is prepared by thickening poly-alpha olefin base oil by adopting a gas-phase method silicon dioxide and adding a solid lubricant, and has an extremely low odor grade; through VS-01.00-L-06005-A1-2018 'odor test specification of non-metallic materials in vehicles', the odor grade is 1.0-1.5 grade, the odor of the lubricating grease is reduced by 1 grade or more compared with that of the lubricating grease in the prior art, and the lubricating grease belongs to a major breakthrough in the field of low-odor lubricating grease;
2. the low-odor automobile switch lubricating grease composition provided by the invention is suitable for lubricating, reducing noise and protecting more than ten switches such as an automobile steering wheel combined switch, an ignition switch, a cruise switch, a glass lifting switch, a lamp system switch, an air conditioner switch and the like; the temperature range of-40 to +120 ℃ of the automobile switch is met, the colloidal stability is excellent, and the lubricating grease structure is kept complete at high temperature; the high-speed shearing machine has excellent shearing resistance, can keep stable structure during high-speed shearing, and does not run off, diffuse, solidify or pollute a switch panel;
3. the low-odor lubricating grease composition for the automobile switch has good compatibility with plastic and rubber parts, does not cause swelling, cracking, softening and deformation of the plastic and rubber parts in the using process, can meet the lubrication of parts in contact with the plastic and rubber parts, and provides comfortable hand feeling for the automobile switch.
Detailed Description
The technical solution of the present invention will be specifically described below with reference to specific examples, but the scope of the present invention is not limited to the following examples.
Example one
86 portions of the mixture with the kinematic viscosity of 40 degrees being 46mm2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 4.5 parts of the poly-alpha olefin base oil with the specific surface area of 200m2Hydrophobic fumed silica/g and 4.5 parts of silica having a specific surface area of 250m2The hydrophilic gas phase method silicon dioxide of/g is stirred for 30 plus or minus 5 minutes; then adding 2 parts of polytetrafluoroethylene micro powder and 3 parts of boron nitride, stirring at constant temperature, vacuumizing and dispersing for 120 +/-10 minutes at the vacuum degree of less than or equal to-0.06 MPa, and discharging into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition
Example two
83 portions of 40-degree kinematic viscosity of 95mm2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 2.5 parts of the poly-alpha olefin base oil with the specific surface area of 300m2Per g of hydrophobic fumed silica and 7.5 parts of a specific surface area of 220m2The hydrophilic gas phase method silicon dioxide of/g is stirred for 30 plus or minus 5 minutes; then 5 parts of polytetrafluoroethylene micro powder and 2 parts of graphite fluoride are added, and then the mixture is stirred at constant temperature, vacuumized and dispersed for 120 plus or minus 10 minutes, the vacuum degree is less than or equal to minus 0.06Mpa, and the mixture is discharged into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition
EXAMPLE III
74.5 portions of 31mm kinematic viscosity at 40 DEG are added2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 12 parts of the poly-alpha olefin base oil with the specific surface area of 180m2The hydrophilic gas phase method silicon dioxide of/g is stirred for 30 plus or minus 5 minutes; then adding 10 parts of polytetrafluoroethylene micro powder, 2.5 parts of boron nitride and 1 part of graphite fluoride, stirring at constant temperature, vacuumizing and dispersing for 120 +/-10 minutes at the vacuum degree of less than or equal to-0.06 MPa, and discharging into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition
Example four
77 parts of a mixture with a kinematic viscosity of 66mm at 40 DEG2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 6.5 parts of the poly-alpha olefin base oil with the specific surface area of 200m2Stirring the hydrophobic fumed silica and 3 parts of hydrophilic fumed silica with the specific surface area of 380m2/g for 30 +/-5 minutes; then adding 7 parts of polytetrafluoroethylene micro powder, 5 parts of boron nitride and 1.5 parts of graphite fluoride, stirring at constant temperature, vacuumizing and dispersing for 120 +/-10 minutes at the vacuum degree of less than or equal to-0.06 MPa, and discharging into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition
EXAMPLE five
84.5 portions of the mixture with 40-degree kinematic viscosity of 29mm2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 5.5 parts of 250m specific surface area2Hydrophobic fumed silica/g and 4.5 parts of 160m specific surface area2The hydrophilic gas phase method silicon dioxide of/g is stirred for 30 plus or minus 5 minutes; then adding 3 parts of polytetrafluoroethylene micro powder and 2.5 parts of graphite fluoride, stirring at constant temperature, vacuumizing and dispersing for 120 +/-10 minutes at the vacuum degree of less than or equal to-0.06 MPa, and discharging into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition
EXAMPLE six
78 parts of 40-degree kinematic viscosity (105 mm)2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 3.5 parts of the poly-alpha olefin base oil with the specific surface area of 300m2Per g of hydrophobic fumed silica and 4.5 parts of a specific surface area of 220m2The hydrophilic gas phase method silicon dioxide of/g is stirred for 30 plus or minus 5 minutes; then 8 parts of polytetrafluoroethylene micro powder, 5 parts of boron nitride and 1 part of graphite fluoride are added, the mixture is stirred at constant temperature, vacuumized and dispersed for 120 plus or minus 10 minutes, the vacuum degree is less than or equal to minus 0.06MPa, and the mixture is discharged and put into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition
EXAMPLE seven
87.5 parts of a 40-degree kinematic viscosity of 46m ═ m2Adding the poly-alpha olefin base oil/s into a clean reaction kettle, heating and stirring to raise the temperature to 80 +/-5 ℃, and then slowly adding 5.5 parts of the poly-alpha olefin base oil with the specific surface area of 200m2Stirring the hydrophobic fumed silica for 30 +/-5 minutes; then 5 parts of polytetrafluoroethylene micro powder and 2 parts of boron nitride are added, and then the mixture is stirred at constant temperature, vacuumized and dispersed for 120 plus or minus 10 minutes, the vacuum degree is less than or equal to minus 0.06Mpa, and the mixture is discharged into a barrel.
Naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition.
In the embodiment, the average grain diameter of the polytetrafluoroethylene micro powder is 5 microns, and the whiteness is more than or equal to 95; the boron is in a hexagonal crystal form, the purity of the boron is more than or equal to 99%, and the average grain diameter is 10 microns; the graphite fluoride is of a lamellar structure, the average grain diameter is 8-10 microns, and the fluorocarbon ratio is more than or equal to 1.20.
The technical parameters of the low-odor automotive switch grease compositions obtained in examples one to seven are shown in table 1 below:
TABLE 1
As can be seen from the above table, the low-odor automobile switch lubricating grease prepared by the invention is tested by VS-01.00-L-06005-A1-2018, namely odor test specification of non-metallic materials in automobiles, and the odor grade is evaluated to be 1.0-1.5 grade under the test condition of 65 ℃ multiplied by 2h, so that the requirement that the odor grade of the lubricating grease used in passenger automobiles is less than or equal to 2.5 grade is met, and meanwhile, the lubricating grease completely meets the requirements of good lubrication, noise reduction and protection of more than ten kinds of switches such as automobile steering wheel combination switches, ignition switches, cruise switches, glass lifting switches, lamp system switches, air conditioner switches and the like.
The low-odor lubricating grease composition for the automobile switch meets the requirements of high and low temperature performance and lubricating function of the automobile switch, and is mainly used for overcoming the low-odor performance, and the odor is improved and reduced mainly from the following four aspects:
1) the gas-phase method silicon dioxide is selected to replace the traditional soap-based thickening agents such as lithium dodecahydroxy stearate, and the odor grade of the lithium dodecahydroxy stearate is about 2.5 grade, and the odor grade of the gas-phase method silicon dioxide is about 0.5 grade, so that the odor of the lubricating grease can be greatly reduced;
2) the composite solid lubricant of one or more of polytetrafluoroethylene micro powder, boron nitride or graphite fluoride can meet the lubricating requirement of the automobile switch lubricating grease, and meanwhile, the three solid lubricants are white compounds which are nearly odorless, have good high-temperature thermal stability, can not release odor at high temperature, and can avoid selecting liquid organic friction-reducing and wear-resisting compounds containing sulfur, phosphorus, nitrogen, oxygen or hydroxyl, carboxyl and the like and having large odors;
3) the low-odor automobile switch lubricating grease composition is not added with any antioxidant, antirust agent and corrosion inhibitor, because the base oil poly alpha-olefin oil, the thickening agent fumed silica and the solid lubricant selected by the composition are excellent in high-temperature thermal stability, chemical stability and oxidation resistance, and the environment temperature of the low-odor automobile switch lubricating grease applied to an automobile cab is close to room temperature. The requirements of rust prevention, corrosion prevention and service life of the low-odor automobile switch lubricating grease can be met without adding any antioxidant, antirust agent and corrosion inhibitor, and meanwhile, the odor caused by the antioxidant, the antirust agent and the corrosion inhibitor can be avoided;
4) the low-odor automobile switch lubricating grease composition is prepared by adopting clean equipment and appliances, a grease forming process at the temperature of not more than 85 ℃ and a clean production environment, and avoids the mixing of peculiar smell in the preparation process.
The low-odor automobile switch lubricating grease composition prepared by thickening poly-alpha-olefin base oil by adopting gas-phase silicon dioxide and adding a solid lubricant has an extremely low odor grade, and the odor grade is 1.0-1.5 grade through the test of US-01.00-L-06005-A1-2008' odor test specification of non-metallic materials in automobiles, and is reduced by more than 1 grade compared with the odor grade of the lubricating grease in the prior art; meanwhile, the problem that the automobile switch is reset slowly or even not at low temperature is solved, the effects of smooth operation and comfortable hand feeling are achieved, the problems of loss, diffusion and panel pollution of grease on the automobile switch are solved, and the service life requirement of the automobile switch is met.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. A low-odor automobile switch lubricating grease composition is characterized in that: the paint comprises the following components in parts by weight:
62-93 parts of base oil
5-20 parts of thickening agent
2-18 parts of a solid additive.
2. The low odor automotive switch grease composition according to claim 1 wherein: the base oil adopts poly alpha-olefin oil which is polymer of decene oligomerization,the technical parameters are as follows: kinematic viscosity at 40 ℃ of 29-110mm2The flash point is more than or equal to 220 ℃, the pour point is less than or equal to minus 45 ℃, and the color and the smell are colorless.
3. The low odor automotive switch grease composition according to claim 1 wherein: the thickening agent has a specific surface area of 150-400 m2(ii) one or a mixture of both hydrophilic and hydrophobic fumed silicas per gram.
4. The low odor automotive switch grease composition according to claim 1 wherein: the solid additive is one or a combination of several of polytetrafluoroethylene micro powder, boron nitride or graphite fluoride.
5. The low odor automotive switch grease composition according to claim 4 wherein: the average grain diameter of the polytetrafluoroethylene micro powder is 5 microns, and the whiteness is not less than 95.
6. The low odor automotive switch grease composition according to claim 4 wherein: the boron nitride is in a hexagonal crystal form, the purity of the boron nitride is more than or equal to 99%, and the average grain diameter of the boron nitride is 10 microns.
7. The low odor automotive switch grease composition according to claim 4 wherein: the graphite fluoride is of a lamellar structure, the average grain diameter is 8-10 microns, and the fluorine-carbon ratio is more than or equal to 1.20.
8. A method of preparing a low odor automotive switch grease composition according to any one of claims 1 to 7, characterized in that:
1) firstly, cleaning a reaction kettle, a three-roller grinding machine and other preparation tools to avoid mixing other impurities to influence the smell and performance of the low-smell automobile switch lubricating grease composition;
2) adding base oil into a reaction kettle, heating and stirring to 80 +/-5 ℃, slowly adding a thickening agent, stirring for 30 +/-5 minutes, then adding a solid additive, stirring at constant temperature, vacuumizing and dispersing for 120 +/-10 minutes, wherein the vacuum degree is less than or equal to-0.06 MPa, and discharging into a barrel;
3) naturally cooling to room temperature, and grinding for 3 times by a three-roll grinder to obtain the low-odor automobile switch lubricating grease composition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540102A (en) * | 2021-12-02 | 2022-05-27 | 深圳市优宝新材料科技有限公司 | Low-odor lubricating grease composition and preparation method thereof |
| CN115074170A (en) * | 2021-03-16 | 2022-09-20 | 克鲁勃润滑产品（上海）有限公司 | Preparation method of lubricating grease, lubricating grease and automobile |
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| CN114540102A (en) * | 2021-12-02 | 2022-05-27 | 深圳市优宝新材料科技有限公司 | Low-odor lubricating grease composition and preparation method thereof |
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| CN112375606B (en) | 2022-10-28 |
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