CN115926343A - Rubber material for oil seal of automobile gearbox and preparation method thereof - Google Patents
Rubber material for oil seal of automobile gearbox and preparation method thereof Download PDFInfo
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- CN115926343A CN115926343A CN202211435759.3A CN202211435759A CN115926343A CN 115926343 A CN115926343 A CN 115926343A CN 202211435759 A CN202211435759 A CN 202211435759A CN 115926343 A CN115926343 A CN 115926343A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Abstract
The invention relates to a rubber material for an oil seal of an automobile gearbox and a preparation method thereof, belonging to the technical field of rubber material preparation and comprising the following raw materials in parts by weight: 100 parts of fluororubber raw rubber, 2-3 parts of glass fiber, 3-5 parts of stearic acid, 0.5-0.8 part of calcium carbonate, 1-2 parts of paraffin, 0.8-1.2 parts of oleic diethanolamine borate, 0.8-1.2 parts of zinc oxide, 8-10 parts of aluminum oxide, 25 parts of carbon black, 5-10 parts of modified hybrid filler and 1-3 parts of sulfur; the modified hybrid filler can form a shielding layer in a rubber matrix, so that the permeation of oil and gas is hindered, the corrosion of the oil is effectively prevented, the corrosion resistance of the matrix is improved, the ageing resistance of the rubber material is improved due to the introduction of cardanol and allyl diphenylamine, and the service life of the oil-sealed rubber material is further prolonged.
Description
Technical Field
The invention belongs to the technical field of rubber material preparation, and particularly relates to a rubber material for an oil seal of an automobile gearbox and a preparation method thereof.
Background
The oil seal is a key part in a mechanical basic part, plays a role in preventing lubricating medium from leaking in a mechanical device, and ensures the normal operation of the mechanical device. The oil seal has wide application field, and the oil seal can not be lacked in places with rotating shafts or gears, and is particularly applied to various industries such as automobiles, ships, aerospace, machine tool equipment and the like.
The main function of the oil seal for the gearbox is to prevent lubricating oil from leaking outwards from a fit clearance between a hole and a shaft, and simultaneously prevent dust and impurities from entering the interior, and the oil seal needs to bear high rotating speed, medium resistance and high and low temperature resistance working conditions.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a rubber material for an oil seal of an automobile gearbox and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a rubber material for an oil seal of an automobile gearbox comprises the following raw materials in parts by weight:
100 parts of fluororubber raw rubber, 2-3 parts of glass fiber, 3-5 parts of stearic acid, 0.5-0.8 part of calcium carbonate, 1-2 parts of paraffin, 0.8-1.2 parts of oleic diethanolamine borate, 0.8-1.2 parts of zinc oxide, 8-10 parts of aluminum oxide, 25 parts of carbon black, 5-10 parts of modified hybrid filler and 1-3 parts of sulfur;
the rubber material for the oil seal of the automobile gearbox is prepared by the following steps:
placing the fluororubber raw rubber on an open mill, rolling for 10-15min, then discharging, wherein the plastication temperature of a front roller of the open mill is 55-60 ℃, the plastication temperature of a rear roller of the open mill is 40-50 ℃, then placing the mixture in an internal mixer, adding the rest raw materials except sulfur, uniformly mixing, then discharging, the mixing temperature is 50-60 ℃, the mixing time is 3-4min, standing for 12-36h, then placing the mixture in the open mill, adding sulfur for vulcanization, vulcanizing at the temperature of 150-180 ℃ for 0.5-1h, then heating to 200-210 ℃, vulcanizing for 12-24h, finally cooling to 60-80 ℃, and then discharging to obtain the rubber material for the oil seal of the automobile gearbox.
Further, the modified hybrid filler is made by the steps of:
s11, placing the hybrid filler into absolute ethyl alcohol and deionized water according to a mass ratio of 3:1, stirring for 10-20min, adjusting the pH value to 4-5 with formic acid, adding 3-mercaptopropyltriethoxysilane, stirring for 10min, heating to 60-70 ℃, stirring for reaction for 5-6h, filtering after the reaction is finished, washing and drying a filter cake to obtain a sulfhydrylation hybrid filler, wherein the mass ratio of the hybrid filler to the ethanol aqueous solution to the 3-mercaptopropyltriethoxysilane is 10:100:0.3-0.4;
s12, dispersing the thiolated hybrid filler in xylene, adding allyl diphenylamine and cardanol, stirring for 5-8min, introducing nitrogen, heating to 40 ℃, adding triethylamine, continuously heating to 130-140 ℃, stirring for reacting for 2-3h, filtering after the reaction is finished, washing and drying a filter cake to obtain the modified hybrid filler, wherein the dosage ratio of the thiolated hybrid filler to the xylene to the allyl diphenylamine to the cardanol to the triethylamine is 10g:100-120mL:0.5-0.7g:0.8-1.2g:1.3-1.5g.
The method comprises the steps of firstly, carrying out surface treatment on a hybrid filler by using 3-mercaptopropyltriethoxysilane to reduce the surface hydrophilicity of the hybrid filler, grafting active groups to lay a foundation for subsequent modification, then, carrying out addition reaction on the mercapto group of the thiolated hybrid filler and the double bonds of allyl diphenylamine and cardanol under the action of triethylamine to obtain the modified hybrid filler, wherein the modified hybrid filler is a composite filler consisting of graphene oxide and magnesium-aluminum hydrotalcite, has a layered composite structure and high barrier property, can block the erosion of an oil agent and the permeation of corrosive gas when being added into a rubber material, and can endow the hybrid filler with good compatibility with a matrix and improve the aging resistance of the rubber material due to surface chemical linkage of the allyl diphenylamine and the cardanol.
Further, the hybrid filler is made by the steps of:
ultrasonically dispersing graphene oxide in deionized water, adding magnesium nitrate and aluminum nitrate, stirring for 0.5-1h, adding a sodium hydroxide solution to adjust the pH value to 10-11, keeping the temperature of a reaction product at 85 ℃ for 24h, performing suction filtration, washing a filter cake with deionized water until a washing liquid is neutral, and performing freeze drying to obtain a hybrid filler, wherein the use amount ratio of the graphene oxide to the deionized water is 1g:1000mL, the ultrasonic power is 800W, the ultrasonic time is 2h, and the mass ratio of graphene oxide to magnesium nitrate is 1:2.5:1.9.
the graphene oxide has high strength, high modulus and gas barrier property, the surface of the magnesium-aluminum hydrotalcite is rich in hydroxyl and is a lamellar material, the magnesium-aluminum hydrotalcite is deposited on the surface of the graphene oxide by an in-situ deposition method, and the high-quality properties of the magnesium-aluminum hydrotalcite and the magnesium-aluminum hydrotalcite are integrated, so that the hybrid filler has the high mechanical strength and the gas barrier property of the graphene oxide, has a hierarchical composite structure (the barrier property is stronger), the problems that the graphene oxide is easily agglomerated and is difficult to disperse when being singly adopted as the filler are solved, the surface of the formed hybrid filler is rich in hydroxyl, and organic modification is easily carried out.
Further, the allyldiphenylamine is prepared by the following steps:
adding 4-aminodiphenylamine into a flask with a magnetic stirrer at room temperature, adding absolute ethanol, stirring for dissolving, dropwise adding dibutyltin dilaurate and allyl isothiocyanate in sequence, heating to 50 ℃ after dropwise adding, stirring for reacting for 4 hours, cooling to room temperature, continuing to react for 48 hours, pouring a reaction product into cyclohexane, stirring, performing suction filtration, washing a filter cake with cyclohexane for 3-5 times, and performing vacuum drying at 40 ℃ to constant weight to obtain allyldiphenylamine;
wherein, 4-aminodiphenylamine, absolute ethyl alcohol and dilauric acid are adoptedThe dosage ratio of the butyl tin to the allyl isothiocyanate is 11.28g:60-80mL:0.062g:6.2 to 7.3g of 4-aminodiphenylamine-NH under the catalysis of dibutyltin dilaurate 2 And allyl isothiocyanate-NCS to form a substance containing allyl, diphenylamine and thiourea structures, namely the allyl diphenylamine.
Further, the raw fluororubber is selected from one or more of fluororubber 26, fluororubber 2602 and fluororubber 2641, and the mixture is composed according to any proportion.
The invention has the beneficial effects that:
the rubber material for the oil seal of the automobile gearbox, which is prepared by the invention, has the characteristics of high sealing performance, corrosion resistance and aging resistance, and is mainly characterized in that the modified hybrid filler is added into the rubber material, and the modified hybrid filler can form a shielding layer in a rubber matrix, so that the permeation of an oil agent and gas is hindered, the corrosion of the oil agent is effectively prevented, the corrosion resistance of the matrix is improved, and the aging resistance of the rubber material is improved, because: firstly, a shielding layer formed by the modified hybrid filler prevents the diffusion of corrosive gases such as oxygen and the like, and improves the aging resistance of a matrix; secondly, the surface grafted allyl diphenylamine structure of the modified hybrid filler can improve the aging resistance of the rubber material, and has the aging resistance of diphenylamine-type anti-aging agents on one hand, and on the other hand, the thiourea structure in a molecular chain can effectively decompose hydroperoxide ROOH, and the sulfur-containing free radicals terminate active oxygen radicals such as R & ROO & and the like, and the sulfur oxides further decompose ROOH to inhibit the rubber aging reaction; thirdly, phenolic hydroxyl in cardanol molecules can capture active free radicals and combine with the active free radicals to generate stable compounds and low-activity free radicals, so that the cardanol molecules have an anti-oxidation effect, and the anti-aging performance of the rubber material is improved; and cardanol is an environment-friendly functional plasticizer, and is easy to generate plasticizing reaction in rubber, so that the processability of the rubber is improved, double bonds on a molecular chain can participate in crosslinking reaction, the modified hybrid filler is firmly fixed in the rubber material through chemical bonds, and the reinforcing effect of the modified hybrid filler is exerted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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
This example provides an allyldiphenylamine prepared by the steps of:
under the condition of room temperature, 11.28g of 4-aminodiphenylamine is added into a flask with a magnetic stirrer, 60mL of absolute ethyl alcohol is added, stirring and dissolving are carried out, 0.062g of dibutyltin dilaurate and 6.2g of allyl isothiocyanate are successively dropwise added, after dropwise addition is finished, the temperature is raised to 50 ℃, stirring and reacting are carried out for 4 hours, then the temperature is reduced to room temperature, reaction is carried out for 48 hours, a reaction product is poured into cyclohexane, stirring and suction filtering are carried out, a filter cake is washed for 3 times by cyclohexane, and vacuum drying is carried out at 40 ℃ until constant weight is achieved, so that the allyldiphenylamine is obtained.
Example 2
This example provides an allyldiphenylamine prepared by the steps of:
under the condition of room temperature, adding 11.28g of 4-aminodiphenylamine into a flask with a magnetic stirrer, adding 80mL of absolute ethanol, stirring for dissolving, dropwise adding 0.062g of dibutyltin dilaurate and 7.3g of allyl isothiocyanate successively, after dropwise adding, heating to 50 ℃, stirring for reacting for 4 hours, then cooling to room temperature, continuing reacting for 48 hours, pouring a reaction product into cyclohexane, stirring, carrying out suction filtration, washing a filter cake for 5 times by using cyclohexane, and carrying out vacuum drying at 40 ℃ to constant weight to obtain the allyldiphenylamine.
Example 3
This example provides a modified hybrid filler made by the following steps:
step S11, placing 10g of hybrid filler in absolute ethyl alcohol and deionized water according to a mass ratio of 3:1, stirring for 10min, adjusting the pH value to 4 with formic acid, adding 0.3g of 3-mercaptopropyltriethoxysilane, stirring for 10min, heating to 60 ℃, stirring for reaction for 5h, filtering after the reaction is finished, washing a filter cake, and drying to obtain a sulfhydrylation hybrid filler;
and S12, dispersing 10g of sulfhydrylation hybrid filler in 100mL of dimethylbenzene, then adding 0.5g of allyl diphenylamine and 0.8g of cardanol in the embodiment 1, stirring for 5min, introducing nitrogen, heating to 40 ℃, adding 1.3g of triethylamine, continuously heating to 130 ℃, stirring for reaction for 2h, filtering after the reaction is finished, washing a filter cake, and drying to obtain the modified hybrid filler.
The hybrid filler is prepared by the following steps:
ultrasonically dispersing 1g of graphene oxide in 1000mL of deionized water, wherein the ultrasonic power is 800W, the ultrasonic time is 2 hours, adding 2.5g of magnesium nitrate and 1.9g of aluminum nitrate, stirring for 0.5 hour, adding a sodium hydroxide solution to adjust the pH value to 10, keeping the temperature of a reaction product at 85 ℃ for 24 hours, carrying out suction filtration, washing a filter cake with deionized water until a washing solution is neutral, and carrying out freeze drying to obtain the hybrid filler.
Example 4
This example provides a modified hybrid filler made by the following steps:
step S11, placing 10g of hybrid filler in absolute ethyl alcohol and deionized water according to a mass ratio of 3:1, stirring for 20min, adjusting the pH value to 5 with formic acid, adding 0.4g 3-mercaptopropyltriethoxysilane, stirring for 10min, heating to 70 ℃, stirring for reaction for 6h, filtering after the reaction is finished, washing a filter cake, and drying to obtain a sulfhydrylation hybrid filler;
and S12, dispersing 10g of sulfhydrylation hybrid filler in 120mL of dimethylbenzene, then adding 0.7g of allyl diphenylamine and 1.2g of cardanol in the embodiment 2, stirring for 8min, introducing nitrogen, heating to 40 ℃, adding 1.5g of triethylamine, continuously heating to 140 ℃, stirring for reaction for 3h, filtering after the reaction is finished, and washing and drying a filter cake to obtain the modified hybrid filler.
The hybrid filler is prepared by the following steps:
ultrasonically dispersing 1g of graphene oxide in 1000mL of deionized water, wherein the ultrasonic power is 800W, the ultrasonic time is 2 hours, adding 2.5g of magnesium nitrate and 1.9g of aluminum nitrate, stirring for 1 hour, adding a sodium hydroxide solution to adjust the pH value to 11, keeping the temperature of a reaction product at 85 ℃ for 24 hours, carrying out suction filtration, washing a filter cake with deionized water until a washing solution is neutral, and carrying out freeze drying to obtain the hybrid filler.
Example 5
A rubber material for an oil seal of an automobile gearbox comprises the following raw materials in parts by weight:
100 parts of fluororubber, 2 parts of glass fiber, 3 parts of stearic acid, 0.5 part of calcium carbonate, 1 part of paraffin, 0.8 part of oleic acid diethanolamine borate, 0.8 part of zinc oxide, 8 parts of aluminum oxide, 25 parts of carbon black, 5 parts of modified hybrid filler in example 3 and 1 part of sulfur;
the rubber material for the oil seal of the automobile gearbox is prepared by the following steps:
placing the fluororubber 26 on an open mill, rolling for 10min, then discharging, wherein the plastication temperature of a front roller of the open mill is 55 ℃, the plastication temperature of a rear roller of the open mill is 40 ℃, then placing the open mill in an internal mixer, adding the rest raw materials after sulfur removal, uniformly mixing, discharging, mixing at 50 ℃, mixing for 3min, standing for 12h, placing the mixture in the open mill, adding sulfur for vulcanization, wherein the vulcanization temperature of the first-stage vulcanization is 150 ℃, the vulcanization time is 1h, then heating to 200 ℃ for vulcanization for 24h, finally cooling to 60 ℃ and then discharging to obtain the rubber material for the oil seal of the automobile gearbox.
Example 6
A rubber material for an oil seal of an automobile gearbox comprises the following raw materials in parts by weight:
100 parts of fluororubber 2602, 3 parts of glass fiber, 4 parts of stearic acid, 0.7 part of calcium carbonate, 1.5 parts of paraffin, 1.0 part of oleic diethanolamine borate, 1.0 part of zinc oxide, 9 parts of aluminum oxide, 25 parts of carbon black, 8 parts of modified hybrid filler of example 4 and 2 parts of sulfur;
the rubber material for the oil seal of the automobile gearbox is prepared by the following steps:
placing the fluororubber 2602 on an open mill, rolling for 13min, then discharging, wherein the plastication temperature of a front roller of the open mill is 58 ℃, the plastication temperature of a rear roller of the open mill is 45 ℃, then placing the mixture in an internal mixer, adding the rest raw materials except sulfur, uniformly mixing, then discharging, mixing at 55 ℃, mixing for 3min, standing for 24h, placing the mixture in the open mill, adding sulfur for vulcanization, wherein the vulcanization temperature of the first-stage vulcanization is 170 ℃, the vulcanization time is 0.8h, then heating to 205 ℃, vulcanizing for 18h, finally cooling to 70 ℃, and then discharging to obtain the rubber material for the oil seal of the automobile gearbox.
Example 7
A rubber material for an oil seal of an automobile gearbox comprises the following raw materials in parts by weight:
2641 parts of fluororubber, 3 parts of glass fiber, 5 parts of stearic acid, 0.8 part of calcium carbonate, 2 parts of paraffin, 1.2 parts of oleic acid diethanolamine borate, 1.2 parts of zinc oxide, 10 parts of aluminum oxide, 25 parts of carbon black, 10 parts of modified hybrid filler of example 4 and 3 parts of sulfur;
the rubber material for the oil seal of the automobile gearbox is prepared by the following steps:
placing fluororubber 2641 on an open mill, rolling for 15min, then discharging, wherein the plastication temperature of a front roller of the open mill is 60 ℃, the plastication temperature of a rear roller of the open mill is 50 ℃, then placing the mixture in an internal mixer, adding the rest raw materials except sulfur, uniformly mixing, then discharging, mixing at 60 ℃ for 4min, standing for 36h, placing the mixture in the open mill, adding sulfur for vulcanization, wherein the vulcanization temperature of the first-stage vulcanization is 180 ℃, the vulcanization time is 1h, then heating to 210 ℃ for vulcanization for 12h, finally cooling to 80 ℃ and then discharging to obtain the rubber material for the oil seal of the automobile gearbox.
Comparative example 1
The modified hybrid filler of example 5 was replaced with the allyldiphenylamine obtained in example 2, and the remaining raw materials and preparation were the same as in example 5.
Comparative example 2
The modified hybrid filler of example 5 was replaced with the thiolated hybrid filler obtained in step S11 of example 3, and the remaining raw materials and preparation process were the same as those of example 5.
The rubber materials for oil seals prepared in examples 5 to 7 and comparative examples 1 to 2 were tested for tensile strength with reference to GB/T528; calculating the tensile strength change rate (%) according to the heat aging resistance (230 ℃ multiplied by 70 h) tested by GB/T3512; referring to the oil resistance of GB/T1690 test (resisting IRM903 standard oil, 150 ℃ multiplied by 70 h), the tensile strength change rate (%) and the volume change rate (%) are calculated; calculating the tensile strength change rate (%) and the volume change rate (%) according to the solvent resistance (methanol resistance, 23 ℃ multiplied by 72 h) of GB/T1690 test; the test results are shown in table 1:
TABLE 1
As can be seen from Table 1, compared with comparative examples 1-2, the rubber materials for the oil seal of the automobile gearbox prepared in examples 5-7 have good mechanical properties and excellent aging resistance, oil resistance and solvent resistance.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (9)
1. The rubber material for the oil seal of the automobile gearbox is characterized by comprising the following raw materials in parts by weight:
100 parts of fluororubber raw rubber, 2-3 parts of glass fiber, 3-5 parts of stearic acid, 0.5-0.8 part of calcium carbonate, 1-2 parts of paraffin, 0.8-1.2 parts of oleic diethanolamine borate, 0.8-1.2 parts of zinc oxide, 8-10 parts of aluminum oxide, 25 parts of carbon black, 5-10 parts of modified hybrid filler and 1-3 parts of sulfur;
wherein the modified hybrid filler is prepared by the following steps:
dispersing the sulfhydrylation hybrid filler in dimethylbenzene, then adding allyl diphenylamine and cardanol, stirring, introducing nitrogen, heating to 40 ℃, adding triethylamine, continuously heating to 130-140 ℃, and stirring for reacting for 2-3 hours to obtain the modified hybrid filler.
2. The rubber material for the oil seal of the automobile gearbox as claimed in claim 1, wherein the using amount ratio of the sulfhydrylation hybrid filler, the dimethylbenzene, the allyl diphenylamine, the cardanol and the triethylamine is 10g:100-120mL:0.5-0.7g:0.8-1.2g:1.3-1.5g.
3. The rubber material for the oil seal of the automobile gearbox as claimed in claim 1, wherein the thiolated hybrid filler is prepared by the following steps:
putting the hybrid filler into an ethanol water solution, stirring, adjusting the pH value to 4-5 by using formic acid, adding 3-mercaptopropyltriethoxysilane, stirring, heating to 60-70 ℃, stirring and reacting for 5-6 hours to obtain the sulfhydrylation hybrid filler.
4. The rubber material for the oil seal of the automobile gearbox as claimed in claim 3, wherein the mass ratio of the hybrid filler to the ethanol aqueous solution to the 3-mercaptopropyltriethoxysilane is 10:100:0.3-0.4.
5. The rubber material for the oil seal of the automobile gearbox as claimed in claim 3, wherein the hybrid filler is prepared by the following steps:
ultrasonically dispersing graphene oxide in deionized water, adding magnesium nitrate and aluminum nitrate, stirring for 0.5-1h, adding a sodium hydroxide solution to adjust the pH value to 10-11, keeping the temperature of a reaction product at 85 ℃ for 24h, performing suction filtration, washing, and freeze-drying to obtain the hybrid filler.
6. The rubber material for the oil seal of the automobile gearbox as claimed in claim 5, wherein the usage ratio of the graphene oxide to the deionized water is 1g:1000mL, the ultrasonic power is 800W, the ultrasonic time is 2h, and the mass ratio of graphene oxide to magnesium nitrate is 1:2.5:1.9.
7. the rubber material for the oil seal of the automobile gearbox as claimed in claim 1, wherein the allyl diphenylamine is prepared by the following steps:
adding 4-aminodiphenylamine and absolute ethyl alcohol into a flask at room temperature, stirring and dissolving, dropwise adding dibutyltin dilaurate and allyl isothiocyanate in sequence, heating to 50 ℃ after dropwise adding, stirring and reacting for 4 hours, cooling to room temperature, and continuing to react for 48 hours to obtain the allyl diphenylamine.
8. The rubber material for the oil seal of the automobile gearbox as recited in claim 7, wherein the using ratio of 4-aminodiphenylamine, absolute ethyl alcohol, dibutyltin dilaurate and allyl isothiocyanate is 11.28g:60-80mL:0.062g:6.2-7.3g.
9. The preparation method of the rubber material for the oil seal of the automobile gearbox according to claim 1, characterized by comprising the following steps of:
placing the fluororubber raw rubber on an open mill, rolling for 10-15min, then discharging, placing in an internal mixer, adding the rest raw materials except sulfur, uniformly mixing, discharging, standing for 12-36h, placing in the open mill, adding sulfur for vulcanization, and obtaining the rubber material for the oil seal of the automobile gearbox.
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| CN202211435759.3A CN115926343A (en) | 2022-11-16 | 2022-11-16 | Rubber material for oil seal of automobile gearbox and preparation method thereof |
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| CN202211435759.3A CN115926343A (en) | 2022-11-16 | 2022-11-16 | Rubber material for oil seal of automobile gearbox and preparation method thereof |
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| CN104497360A (en) * | 2014-12-02 | 2015-04-08 | 华南理工大学 | Nano-silica immobilized hindered phenol antioxidant as well as preparation method and application of antioxidant |
| CN104592701A (en) * | 2015-01-30 | 2015-05-06 | 柳州市颖航汽配有限公司 | Oil seal material for automobile gearbox and preparation method of oil seal material |
| JP2019163414A (en) * | 2018-03-20 | 2019-09-26 | 住友ゴム工業株式会社 | Method for producing rubber/filler complex |
| CN112126061A (en) * | 2020-09-18 | 2020-12-25 | 宁波工程学院 | Preparation method of mercapto-graphene copolymerized mercapto-olefin polymer flame-retardant system |
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