CN111423921B - Lubricating grease for automobile safety airbag and preparation method thereof - Google Patents

Lubricating grease for automobile safety airbag and preparation method thereof Download PDF

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Publication number
CN111423921B
CN111423921B CN202010386224.6A CN202010386224A CN111423921B CN 111423921 B CN111423921 B CN 111423921B CN 202010386224 A CN202010386224 A CN 202010386224A CN 111423921 B CN111423921 B CN 111423921B
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lubricating grease
grease
mixture
silica gel
lubricant
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CN111423921A (en
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陈帆
蒋和清
黄霞
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Zhongshan Tehaode Lubrication Technology Co ltd
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Zhongshan Tehaode Lubrication Technology Co ltd
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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
    • 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
    • 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
    • C10M2205/026—Butene
    • 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
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/024—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings having at least two phenol groups but no condensed ring
    • 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
    • C10M2207/02—Hydroxy compounds
    • C10M2207/023—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/026—Hydroxy compounds having hydroxy groups bound to carbon atoms of six-membered aromatic rings with tertiary alkyl groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • 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
    • C10M2215/02—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
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents
    • C10M2229/0415—Siloxanes with specific structure containing aliphatic substituents used as base material
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/042—Siloxanes with specific structure containing aromatic substituents
    • C10M2229/0425—Siloxanes with specific structure containing aromatic substituents used as base material

Abstract

The invention provides lubricating grease for an automobile safety airbag, which comprises the following components in percentage by mass: 87-92% of lubricant, 5-10% of thickening agent and 2-4% of additive. The thickening agent is hydrophilic silica gel powder and hydrophobic silica gel powder which are mixed for use, the advantages are made up for the disadvantages, the problems of hardening and surface cracking of the lubricating grease in storage can be solved, and the lubricating grease for the automobile safety airbag with good storage stability, chemical stability and good compatibility with plastics such as nylon and the like is prepared. The results of the examples show that the grease for automobile air bags prepared by the invention has the cone penetration of not less than 278mm after being stored for 6 months, the oxidation stability (100 ℃, 100h, 0.2) and the compatibility with nylon (120 ℃, 72h, 0.5 percent of mass change).

Description

Lubricating grease for automobile safety airbag and preparation method thereof
Technical Field
The invention relates to the technical field of lubricating grease, and particularly relates to lubricating grease for an automobile safety airbag and a preparation method thereof.
Background
The modern automobile safety airbag is made of nylon, a layer of synthetic rubber or silicon rubber is coated on the inner surface of the modern automobile safety airbag to ensure the air tightness of the modern automobile safety airbag, meanwhile, a special belt is fixed on the inner surface of the modern automobile safety airbag, and in order to avoid the problem that the airbag breaks down when being exploded due to the fact that the airbag is formed into a hard block due to long-term overlapping or the belt moves to generate disorder, a layer of lubricating grease which can keep the airbag not to be stuck together in a folded state and in an explosion state needs to be coated inside the airbag.
The lubricating grease mainly comprises three parts of a thickening agent, base oil and an additive, wherein common thickening agents comprise metal soaps such as lithium, sodium, calcium and the like, graphite, carbon black, asbestos, bentonite and the like. Although the prior art also has lubricating grease prepared by taking silicon dioxide as a thickening agent, the lubricating grease has defects in storage stability, is easy to harden in the storage process, and causes inconvenience in the production and use processes. Meanwhile, there are problems of compatibility with the substrate and chemical stability.
Disclosure of Invention
The invention aims to provide lubricating grease for an automobile air bag, which has good storage stability, chemical stability and good compatibility with plastics such as nylon.
The invention provides lubricating grease for an automobile safety air bag, which comprises the following components in percentage by mass: 87-92% of a lubricant, 5-10% of a thickening agent and 2-4% of an additive, wherein the thickening agent is hydrophilic silica gel powder and hydrophobic silica gel powder.
Preferably, the mass ratio of the hydrophilic silica gel powder to the hydrophobic silica gel powder is 1: 0.5-1: 1.
Preferably, the lubricant comprises one or more of methyl silicone oil, ethyl silicone oil and methyl phenyl silicone oil.
Preferably, the additives include an antioxidant additive and a tackifier.
Preferably, the mass content of the antioxidant additive in the grease for the automobile air bag is 0.2-0.5%, and the mass content of the tackifier in the grease for the automobile air bag is 1.5-3.5%.
Preferably, the antioxidant additive comprises one or more of an aromatic amine antioxidant additive and a phenolic antioxidant additive.
Preferably, the aromatic amine antioxidant additive comprises one or more of diphenylamine and phenyl-alpha-naphthylamine.
Preferably, the phenolic antioxidant additive comprises one or more of 2, 6-di-tert-butyl-p-cresol, 4,4 methylenebis (2, 6-di-tert-butylphenol), and hydroquinone.
Preferably, the tackifier comprises one or more of polybutene and polyisobutylene.
The invention also provides a preparation method of the lubricating grease for the automobile safety airbag, which comprises the following steps:
mixing part of the lubricant with a thickening agent at 45-55 ℃ to obtain a mixture A;
mixing the mixture A with the rest of the lubricant at 75-85 ℃ to obtain a mixture B;
and mixing the mixture B with an additive at 60-70 ℃, and grinding to obtain the lubricating grease for the automobile safety airbag.
The invention provides lubricating grease for an automobile safety air bag, which comprises the following components in percentage by mass: 87-92% of a lubricant, 5-10% of a thickening agent and 2-4% of an additive, wherein the thickening agent is hydrophilic silica gel powder and hydrophobic silica gel powder. The lubricating grease for the automobile safety airbag is prepared by using the lubricant as a basic component and using hydrophilic silica powder and hydrophobic silica powder as thickening agents, wherein the hydrophilic silica powder has good fluidity and anti-caking property, can prevent the lubricating grease system from being adhered and hardened, and has strong thickening capability, the hydrophobic silica has good water resistance due to the fact that non-hydrolytic methyl groups are connected to the surface of the hydrophobic silica, the hydrophilic silica powder and the hydrophobic silica are mixed for use, the advantages of the hydrophilic silica powder and the hydrophobic silica are made up, the problems of hardening and surface cracking of the lubricating grease in storage can be solved, and the finally prepared lubricating grease for the automobile safety airbag has good storage stability, chemical stability and good compatibility with plastics such as nylon and the like by combining the use of additives. The results of the examples show that the grease for automobile air bags prepared by the invention has the cone penetration of not less than 278mm after being stored for 6 months, the oxidation stability (100 ℃, 100h, 0.2) and the compatibility with nylon (120 ℃, 72h, 0.5 percent of mass change).
The lubricating grease for the automobile safety air bag provided by the invention is low in cost, and the effective service life of the air bag can reach more than 15 years.
Detailed Description
The invention provides lubricating grease for an automobile safety air bag, which comprises the following components in percentage by mass: 87-92% of a lubricant, 5-10% of a thickening agent and 2-4% of an additive, wherein the thickening agent is hydrophilic silica gel powder and hydrophobic silica gel powder.
The lubricating grease for the automobile air bag comprises 87-92% of a lubricant, preferably 88-91% of the lubricant, and more preferably 88.2-90.2% of the lubricant by mass. The invention controls the content of the lubricant within the range, and is beneficial to obtaining the lubricating grease with good stability. When the amount of the lubricant is too large, the stability of the grease is affected by a large amount of oil separated out from the grease, and the cost is increased by too little lubricant. The source of the lubricant is not particularly limited in the present invention, and a commercially available product known to those skilled in the art may be used.
In the present invention, the lubricant preferably includes one or more of methyl silicone oil, ethyl silicone oil, and methylphenyl silicone oil, and more preferably methyl silicone oil. In the invention, the preferable properties of the methyl silicone oil are 800-1200 Cst at the viscosity of 40 ℃, the pour point is less than-50 ℃, and the flash point is more than 300 ℃. In the invention, the methyl silicone oil is a lubricant, which is beneficial to further improving the chemical stability of the lubricating grease for the automobile safety air bag, the compatibility with plastics such as nylon and the like, high and low temperature, and low cost.
The lubricating grease for the automobile safety air bag comprises 5-10% of a thickening agent, preferably 6-9% of the thickening agent, and more preferably 7.5-8.5% of the thickening agent. The invention controls the content of the thickening agent in the range, is beneficial to obtaining the lubricating grease with proper consistency, and further ensures the storage stability and chemical stability of the lubricating grease. In the invention, the thickening agent is hydrophilic silica gel powder and hydrophobic silica gel powder. In the invention, the particle size of the hydrophilic silica gel powder and the particle size of the hydrophobic silica gel powder are preferably 7-40 nm, more preferably 10-35 nm, and most preferably 20-30 nm.
The sources of the hydrophilic silica gel powder and the hydrophobic silica gel powder are not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used. In the invention, the hydrophilic silica gel powder is preferably one or more of A380, N20, A300 and T40, and the hydrophobic silica gel powder is preferably one or more of R202, R974, H20 and H18. In the invention, the specific surface area of the hydrophilic silica gel powder is preferably 170m2More than g. In the invention, the hydrophilic silica gelThe powder specific surface area within the above range has good fluidity and anti-caking property, can further prevent the grease system from blocking and hardening, and has strong thickening ability. In the invention, the specific surface area of the hydrophobic silica gel powder is preferably 130m2More than g. In the present invention, the hydrophobic silica gel powder has a specific surface area within the above range and has good water resistance, but the grease prepared by using it alone as a thickener is easily hardened and surface-cracked. The invention takes hydrophilic silica gel powder and hydrophobic silica gel powder as thickeners, which make up for each other, avoids the problems of hardening and surface cracking of the lubricating grease in storage, and improves the storage stability and chemical stability of the lubricating grease and the compatibility with plastics such as nylon and the like.
In the invention, the mass ratio of the hydrophilic silica gel powder to the hydrophobic silica gel powder is preferably 1: 0.5-1: 1, and more preferably 1: 0.6-1: 0.7. The invention controls the proportion of the hydrophilic silica gel powder and the hydrophobic silica gel powder in the range, and is beneficial to further improving the storage stability and the chemical stability of the lubricating grease for the automobile safety air bag and the compatibility with plastics such as nylon and the like.
The lubricating grease for the automobile safety air bag comprises 2-4% of additive, preferably 2.3-3.5%, and more preferably 2.3-3.3% by mass. In the present invention, the additives preferably include an antioxidant additive and a tackifier.
In the invention, the mass content of the antioxidant additive in the lubricating grease for the automobile safety air bag is preferably 0.2-0.5%, and more preferably 0.3-0.4%. In the invention, the content of the antioxidant additive is preferably controlled within the range, so that the storage stability of the lubricating grease is not influenced while the oxidation resistance of the lubricating grease is improved. The antioxidant additive of the present invention is not particularly limited in kind, and those known to those skilled in the art can be used. In the present invention, the antioxidant additive preferably includes one or more of aromatic amine antioxidant additives and phenolic antioxidant additives.
In the present invention, the aromatic amine antioxidant additive preferably includes one or more of diphenylamine and phenyl- α -naphthylamine, and more preferably diphenylamine. In the present invention, the diphenylamine is preferably used as liquid diphenylamine, which is easily dispersed.
In the present invention, the phenolic antioxidant additive comprises one or more of 2, 6-di-tert-butyl-p-cresol, 4, 4-methylenebis (2, 6-di-tert-butylphenol) and hydroquinone, more preferably 2, 6-di-tert-butyl-p-cresol.
In the invention, the mass content of the tackifier in the grease for the automobile airbag is preferably 1.5-3.5%, and more preferably 2-3%. In the present invention, the content of the thickener is preferably controlled within the above range, which is advantageous for increasing the adhesiveness of the grease and improving the compatibility of the grease with plastics such as nylon. The type of the tackifier used in the present invention is not particularly limited, and a tackifier known to those skilled in the art may be used. In the present invention, the tackifier preferably comprises one or more of polybutene and polyisobutylene, more preferably polyisobutylene.
The invention also provides a preparation method of the lubricating grease for the automobile safety airbag, which comprises the following steps:
mixing part of the lubricant with a thickening agent at 45-55 ℃ to obtain a mixture A;
mixing the mixture A with the rest part of a lubricating agent at 75-85 ℃ to obtain a mixture B;
and mixing the mixture B with an additive at 60-70 ℃, and grinding to obtain the lubricating grease for the automobile safety airbag.
According to the invention, part of the lubricant is mixed with the thickening agent at 45-55 ℃ to obtain a mixture A. In the invention, the mixing temperature of the lubricant and the thickening agent is more preferably 48-52 ℃, and most preferably 50 ℃. According to the invention, the mixing temperature of the lubricant and the thickening agent is preferably controlled within the range, so that the thickening agent can be uniformly dispersed in the lubricant, and the storage stability of the lubricating grease is further improved.
In the present invention, the mass of the partial lubricant is preferably 40% to 50%, more preferably 50%, of the total mass of the lubricant.
The operation of mixing the lubricant and the thickener is not particularly limited in the present invention, and the technical scheme for preparing the mixed material, which is well known to those skilled in the art, can be adopted. In the present invention, the part of the lubricant mixed with the thickener is preferably: under the condition of stirring, part of the lubricant is used as base oil, hydrophilic silica gel powder is added, and hydrophobic silica gel powder is added. The adding rate of the hydrophilic silica gel powder and the hydrophobic silica gel powder is not specially limited, and the adding can be finished within 1 hour. In the invention, the hydrophilic silica gel powder and the hydrophobic silica gel powder are preferably added in batches. In the present invention, the stirring rate is preferably 20 to 40rpm, more preferably 25 to 35rpm, and most preferably 30 rpm.
After the mixture A is obtained, the mixture A and the rest part of the lubricant are mixed at the temperature of 75-85 ℃ to obtain a mixture B. In the present invention, the temperature of mixing the mixture a with the remaining part of the lubricant is more preferably 78 to 82 ℃, and most preferably 80 ℃. In the present invention, the mixing temperature of the mixture a and the remaining amount of the lubricant is preferably controlled within the above range, which is advantageous for forming the lubricant and the thickener into a stable sol state, thereby obtaining a grease excellent in performance. The operation of mixing the mixture A and the rest of the lubricant is not particularly limited in the invention, and the technical scheme for preparing the mixed material, which is well known to the person skilled in the art, can be adopted. Preferably, after the temperature of the mixture A is raised to 75-85 ℃, the mixture A and the rest part of the lubricant are mixed under the stirring condition; the stirring speed is preferably 50-70 rpm, more preferably 55-65 rpm, and most preferably 60 rpm.
After the mixture B is obtained, the mixture B and the additive are mixed and ground at the temperature of 60-70 ℃ to obtain the lubricating grease for the automobile safety airbag. In the invention, the temperature of mixing the mixture B and the additive is more preferably 65-70 ℃, and most preferably 70 ℃. According to the invention, the mixing temperature of the mixture B and the additive is preferably controlled within the range, so that the additive is favorably and uniformly dispersed in the lubricant, and the storage stability of the lubricating grease is prevented from being influenced by the non-uniform dispersion of the additive. The operation of mixing the mixture B and the additives is not particularly limited in the present invention, and the technical scheme for preparing the mixed material, which is well known to those skilled in the art, can be adopted.
The grinding method is not particularly limited in the present invention, and a grinding method known to those skilled in the art may be used. In the present invention, the grinding is preferably carried out by three-roll grinding.
The preparation method provided by the invention can uniformly disperse all components, plays a role of the lubricating grease under the condition of not influencing the performance of the lubricating grease, and finally prepares the lubricating grease for the automobile safety airbag, which has good storage stability, chemical stability and good compatibility with plastics such as nylon.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Raw materials: hydrophilic silica gel powder A3804.5%, hydrophobic silica gel powder R9743.0% (mass ratio of the two is 1:0.67), methyl silicone oil 90.2%, liquid diphenylamine 0.3%, and polyisobutylene 24002%.
The preparation process comprises the following steps: taking 50% of the total mass of the methyl silicone oil as base oil, heating to 50 ℃, adding hydrophilic silica gel powder A380 in batches within 1h while stirring at a stirring speed of 30rpm, and adding hydrophobic silica gel powder R974 in batches within 1h to obtain a mixture A; heating to 80 ℃, and adding the rest part of the methyl silicone oil while stirring at a stirring speed of 60rpm to obtain a mixture B; and (3) cooling to 70 ℃, adding additive liquid diphenylamine and polyisobutylene 2400, and grinding for 3 times by using a three-roller machine to obtain the lubricating grease for the automobile safety airbag.
Example 2
Raw materials: hydrophilic silica gel powder A3805.0%, hydrophobic silica gel powder R9743.5% (mass ratio of the two is 1:0.7), methyl silicone oil 88.2%, liquid diphenylamine 0.3%, and polyisobutylene 24003%.
The same preparation process as in example 1 was employed.
Example 3
Raw materials: hydrophilic silica gel powder A3805.5%, hydrophobic silica gel powder R9743.5% (mass ratio of the two is 1:0.63), methyl silicone oil 87.7%, liquid diphenylamine 0.3%, and polyisobutylene 24003%.
The same preparation process as in example 1 was employed.
TABLE 1 Properties of greases for automobile airbags prepared in examples 1 to 3
Figure BDA0002483939180000071
From the above examples, it can be seen that the grease for an automobile airbag provided by the present invention has good storage stability, chemical stability and good compatibility with plastics such as nylon.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The lubricating grease for the automobile safety air bag comprises the following components in parts by mass: 87-92% of a lubricant, 5-10% of a thickening agent and 2-4% of an additive, wherein the thickening agent is hydrophilic silica gel powder and hydrophobic silica gel powder; the mass ratio of the hydrophilic silica gel powder to the hydrophobic silica gel powder is 1: 0.5-1: 1; the lubricant comprises one or more of methyl silicone oil, ethyl silicone oil and methyl phenyl silicone oil; the additives comprise an antioxidant additive and a tackifier; the mass content of the antioxidant additive in the lubricating grease for the automobile safety air bag is 0.2-0.5%, and the mass content of the tackifier in the lubricating grease for the automobile safety air bag is 1.5-3.5%;
the preparation method of the lubricating grease for the automobile safety airbag comprises the following steps:
mixing part of the lubricant with a thickening agent at 45-55 ℃ to obtain a mixture A;
mixing the mixture A with the rest part of a lubricating agent at 75-85 ℃ to obtain a mixture B;
and mixing the mixture B with an additive at 60-70 ℃, and grinding to obtain the lubricating grease for the automobile safety airbag.
2. The grease for an automobile airbag according to claim 1, wherein the antioxidant additive comprises one or more of aromatic amine antioxidant additives and phenolic antioxidant additives.
3. The grease for an automobile airbag according to claim 2, wherein the aromatic amine antioxidant additive comprises one or more of diphenylamine and phenyl- α -naphthylamine.
4. The grease of claim 2, wherein the phenolic antioxidant additive comprises one or more of 2, 6-di-tert-butyl-p-cresol, 4,4 methylenebis (2, 6-di-tert-butylphenol), and hydroquinone.
5. The grease for an automobile airbag according to claim 1, wherein the tackifier is polyisobutylene.
6. A method for preparing the grease for the automobile air bag according to any one of claims 1 to 5, comprising the steps of:
mixing part of the lubricant with a thickening agent at 45-55 ℃ to obtain a mixture A;
mixing the mixture A with the rest of the lubricant at 75-85 ℃ to obtain a mixture B;
and mixing the mixture B with an additive at 60-70 ℃, and grinding to obtain the lubricating grease for the automobile safety airbag.
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