CN115197481B - Self-lubricating high-durability natural rubber material and preparation method thereof - Google Patents
Self-lubricating high-durability natural rubber material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 48
- 244000043261 Hevea brasiliensis Species 0.000 title claims abstract description 44
- 229920003052 natural elastomer Polymers 0.000 title claims abstract description 44
- 229920001194 natural rubber Polymers 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 229920001971 elastomer Polymers 0.000 claims abstract description 63
- 239000005060 rubber Substances 0.000 claims abstract description 63
- 239000006229 carbon black Substances 0.000 claims abstract description 28
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 17
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000012188 paraffin wax Substances 0.000 claims abstract description 13
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007822 coupling agent Substances 0.000 claims abstract description 12
- 239000000314 lubricant Substances 0.000 claims abstract description 12
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 12
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000008117 stearic acid Substances 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 12
- 239000011593 sulfur Substances 0.000 claims abstract description 12
- 239000011787 zinc oxide Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 11
- UEZWYKZHXASYJN-UHFFFAOYSA-N cyclohexylthiophthalimide Chemical compound O=C1C2=CC=CC=C2C(=O)N1SC1CCCCC1 UEZWYKZHXASYJN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims abstract description 9
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 5
- 239000000194 fatty acid Substances 0.000 claims abstract description 5
- 229930195729 fatty acid Natural products 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 17
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 claims description 12
- ZNRLMGFXSPUZNR-UHFFFAOYSA-N 2,2,4-trimethyl-1h-quinoline Chemical compound C1=CC=C2C(C)=CC(C)(C)NC2=C1 ZNRLMGFXSPUZNR-UHFFFAOYSA-N 0.000 claims description 11
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical compound C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical group C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 claims description 9
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 8
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 8
- UXKQNCDDHDBAPD-UHFFFAOYSA-N 4-n,4-n-diphenylbenzene-1,4-diamine Chemical compound C1=CC(N)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 UXKQNCDDHDBAPD-UHFFFAOYSA-N 0.000 claims description 5
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 3
- 125000005313 fatty acid group Chemical group 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 150000004665 fatty acids Chemical class 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- UTGQNNCQYDRXCH-UHFFFAOYSA-N N,N'-diphenyl-1,4-phenylenediamine Chemical compound C=1C=C(NC=2C=CC=CC=2)C=CC=1NC1=CC=CC=C1 UTGQNNCQYDRXCH-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000004073 vulcanization Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 206010051246 Photodermatosis Diseases 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008845 photoaging Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a self-lubricating high-durability natural rubber material and a preparation method thereof, which belong to the technical field of rubber materials and comprise the following raw materials in parts by weight: 100 parts of natural rubber, 5-10 parts of zinc oxide, 1-3 parts of stearic acid, 3-6 parts of an anti-aging agent, 2-5 parts of composite paraffin, 3-8 parts of a lubricant, 3-5 parts of a coupling agent, 20-40 parts of fumed silica, 20-40 parts of carbon black N550, 1-4 parts of sulfur, 1-4 parts of an accelerator and 0-0.5 part of N-cyclohexyl thiophthalimide; the self-lubricating system is composed of the compound paraffin and the fatty acid amide lubricant in the formula, so that abnormal sound of the product can be effectively eliminated; the formula of the invention selects the white carbon black and the carbon black N550 by the gas phase method for sharing, thereby effectively improving the mechanical property of the natural rubber material; the three components of the anti-aging agents are mutually cooperated and used together, so that the durability of the natural rubber can be effectively improved.
Description
Technical Field
The invention belongs to the technical field of rubber materials, and particularly relates to a self-lubricating high-durability natural rubber material and a preparation method thereof.
Background
Along with the continuous expansion of vehicle groups, the requirements of people on abnormal sound of automobiles are more and more strict, and a plurality of rubber materials such as bushings in suspension systems are used in automobile chassis, but the friction coefficient of the rubber materials is high at present, and especially in wet rainy days, the rubber materials and metal parts relatively move to generate friction abnormal sound, so that the noise of the whole automobile is increased.
The invention patent CN105295120B discloses a rubber with self-lubricating effect for a bushing, which comprises the following components in percentage by weight: 55-59% of natural rubber, 14-7% of butadiene rubber, 0.7-2% of oleamide, 0.7-2% of molybdenum disulfide, 0.7-2% of carbon nano tube, 3.5-4.1% of graphite, 3.5-3.2% of zinc oxide, 1% of stearic acid, 1.7-1% of antioxidant 6PPD, 1% of antioxidant TMQ, 2% of microcrystalline wax, 330.8-13.1% of carbon black N, 1.4-1.3% of sulfur and 1.0-1.3% of accelerator CZ; the invention uses the quadruple lubrication combination of oleamide, molybdenum disulfide, carbon nano tube and graphite to ensure that the rubber preparation raw material has good lubrication effect in each friction stage; however, the mixing of various self-lubricating components can have an effect on the strength and durability of the rubber material, and the difference between the strength and durability of the rubber material of the invention and the conventional rubber material can be seen through data.
Disclosure of Invention
The invention aims to provide a self-lubricating high-durability natural rubber material and a preparation method thereof, which can improve the strength and durability of the rubber material and prolong the service life of the rubber material on the premise of ensuring the self-lubricating property of the rubber material and reducing the friction coefficient.
The aim of the invention can be achieved by the following technical scheme:
The self-lubricating high-durability natural rubber material comprises the following raw materials in parts by weight: 100 parts of natural rubber, 5-10 parts of zinc oxide, 1-3 parts of stearic acid, 3-6 parts of an anti-aging agent, 2-5 parts of composite paraffin, 3-8 parts of a lubricant, 3-5 parts of a coupling agent, 20-40 parts of fumed silica, 20-40 parts of carbon black N550, 1-4 parts of sulfur, 1-4 parts of an accelerator and 0-0.5 part of N-cyclohexyl thiophthalimide; wherein, N-cyclohexyl thiophthalimide is used as a scorch inhibitor, which can avoid the phenomenon of scorching during the high temperature vulcanization process and improve the safety and reliability.
Further, the anti-aging agent is formed by mixing 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N '-diphenyl-p-phenylenediamine and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to a mass ratio of 1-2:1-2:1-2; the anti-aging agent is composed of three components, wherein N-N '-diphenyl-p-phenylenediamine and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine are all universal anti-aging agents, have excellent flex crack resistance and dynamic fatigue resistance, have good effects on ozone and photo-aging, but are easy to separate out from rubber materials to cause frosting when the single dosage is too high, so that the anti-aging agent is used in a small amount; the 2, 4-trimethyl-1, 2-dihydroquinoline polymer has remarkable aging protection effect on heat and oxygen, and can effectively improve the heat aging resistance of natural rubber; the three components are mutually cooperated and used together to achieve more excellent durability.
Further, the lubricant is a fatty acid amide lubricant, specifically one of oleamide and erucamide.
Further, the accelerator is N-cyclohexyl-2-benzothiazole sulfenamide and 2-mercaptobenzothiazole according to the mass ratio of 1-3: 0-1.
A preparation method of a self-lubricating high-durability natural rubber material comprises the following steps:
Step S1, one-stage mixing: adding natural rubber into an internal mixer, mixing for 25-30s, adding zinc oxide, stearic acid, an anti-aging agent, a coupling agent, composite paraffin and a lubricant, mixing to 70-80 ℃, adding fumed silica and carbon black N550, mixing to 140-160 ℃, and discharging rubber to obtain a section of rubber;
Step S2, two-stage mixing: after the first section of rubber is parked for 8-16 hours, sulfur, an accelerator and N-cyclohexyl thiophthalimide are added for mixing to 100-120 ℃ and rubber is discharged, so that final rubber is obtained;
step S3, vulcanization: and (3) after the final rubber mixture is molded, the final rubber mixture is sent into a vulcanizing machine and vulcanized for 12-20min at 150-160 ℃ to obtain a self-lubricating high-durability natural rubber material finished product.
Further, in the step S1, the bolts are lifted once respectively at the temperature of 120 ℃ and 135 ℃ for 15-30 seconds.
The hardness of the rubber material in the formula is about 65, the friction coefficient is less than 0.5, the rubber breaking strength reaches about 23MPa, and the breaking elongation is about 550%.
The invention has the beneficial effects that:
The formula of the self-lubricating system mainly comprises the compound paraffin and the fatty acid amide lubricant, and after the rubber material is vulcanized and molded, the fatty acid amide lubricant gradually migrates to the surface of the rubber material to form a lubricating film, so that the friction coefficient of the rubber is reduced to less than 0.5, and abnormal sound of the product can be effectively eliminated;
According to the formula, the fumed silica and the carbon black N550 are selected to be shared, the fumed silica has a reinforcing effect similar to that of the fine-particle carbon black, but the heat generation is lower than that of the fine-particle carbon black, and the coupling agent in the formula enables the fumed silica to be coupled with the natural rubber, so that the mechanical properties such as strength and elongation of the natural rubber material can be effectively improved; however, when the consumption of the fumed silica is too large, the hardening effect is poor, mainly because of poor dispersion, so that the fumed silica is used together with carbon black N550, the carbon black N550 belongs to medium-particle carbon black, the performance of the fumed silica is easier to disperse in rubber and generates less heat compared with the fine-particle carbon black, the reinforcing effect is better compared with the coarse-particle carbon black, and the fumed silica has excellent mechanical property and processability compared with the fumed silica; meanwhile, considering that the gas-phase white carbon black is weakly acidic, the vulcanization time of the rubber material can be prolonged, so that the vulcanization time is regulated by adding the accelerator, the formula strength and the elongation can be further improved by adding the accelerator, the ultimate breaking strength of the rubber can reach about 23MPa, and the breaking elongation is about 550%.
The anti-aging agent in the formula of the invention selects three components of the 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N-N '-diphenyl-p-phenylenediamine and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, and the three components are mutually cooperated and combined, so that the anti-aging agent has better protection effect on heat, oxygen, ozone and photo-aging, can effectively improve the heat aging resistance of natural rubber, and achieves more excellent durability.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The self-lubricating high-durability natural rubber material comprises the following raw materials in parts by weight:
100 parts of natural rubber, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 1 part of N, N '-diphenyl-p-phenylenediamine, 1 part of N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, 2 parts of composite paraffin, 3 parts of oleamide, 3 parts of coupling agent Si-69, 20 parts of fumed silica, 550 parts of carbon black N, 1 part of sulfur and 1 part of N-cyclohexyl-2-benzothiazole sulfenamide.
The preparation method of the self-lubricating high-durability natural rubber material comprises the following steps:
step S1, adding natural rubber into an internal mixer, mixing for 25 seconds, adding zinc oxide, stearic acid, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N '-diphenyl-p-phenylenediamine, N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, a coupling agent Si-69, composite paraffin and oleamide, mixing to 70 ℃, adding fumed silica and carbon black N550, mixing to 140 ℃, and discharging rubber to obtain a section of rubber; wherein, when the mixture is mixed to 120 ℃ and 135 ℃, the top bolts are lifted once for 15 seconds;
S2, after a section of rubber is parked for 8 hours, adding sulfur and N-cyclohexyl-2-benzothiazole sulfenamide, mixing to 100 ℃, and discharging the rubber to obtain final rubber;
and step S3, molding the final rubber mixture, and then, feeding the molded final rubber mixture into a vulcanizing machine, and vulcanizing the final rubber mixture at 150 ℃ for 20min to obtain a self-lubricating high-durability natural rubber material finished product.
Example 2
The self-lubricating high-durability natural rubber material comprises the following raw materials in parts by weight:
100 parts of natural rubber, 8 parts of zinc oxide, 2 parts of stearic acid, 1.5 parts of 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 1.5 parts of N, N '-diphenyl-p-phenylenediamine, 1.5 parts of N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, 3 parts of compound paraffin wax, 5 parts of oleamide, 694 parts of coupling agent Si-694 parts, 30 parts of gas-phase white carbon black, 550 parts of carbon black N, 3 parts of sulfur, 2 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 0.8 part of 2-mercaptobenzothiazole and 0.3 parts of N-cyclohexyl thiophthalimide.
The preparation method of the self-lubricating high-durability natural rubber material comprises the following steps:
S1, adding natural rubber into an internal mixer, mixing for 28 seconds, adding zinc oxide, stearic acid, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N '-diphenyl-p-phenylenediamine, N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, a coupling agent Si-69, composite paraffin and oleamide, mixing to 75 ℃, adding fumed silica and carbon black N550, mixing to 150 ℃, and discharging rubber to obtain a section of rubber; wherein, when the mixture is mixed to 120 ℃ and 135 ℃, lifting the top bolt for 20s respectively;
s2, after a section of rubber is parked for 12 hours, adding sulfur, N-cyclohexyl-2-benzothiazole sulfenamide, 2-mercaptobenzothiazole and N-cyclohexyl thiophthalimide, mixing to 110 ℃ and discharging rubber to obtain final rubber;
and step S3, molding the final rubber mixture, then sending the molded final rubber mixture into a vulcanizing machine, and vulcanizing the final rubber mixture at 155 ℃ for 16min to obtain a self-lubricating high-durability natural rubber material finished product.
Example 3
The self-lubricating high-durability natural rubber material comprises the following raw materials in parts by weight:
100 parts of natural rubber, 10 parts of zinc oxide, 3 parts of stearic acid, 2 parts of 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 2 parts of N, N '-diphenyl-p-phenylenediamine, 2 parts of N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, 5 parts of compound paraffin, 8 parts of erucic acid amide, 40 parts of coupling agent Si-695 parts of fumed silica, 550 parts of carbon black N, 4 parts of sulfur, 3 parts of N-cyclohexyl-2-benzothiazole sulfenamide, 1 part of 2-mercaptobenzothiazole and 0.5 part of N-cyclohexyl thiophthalimide.
The preparation method of the self-lubricating high-durability natural rubber material comprises the following steps:
Step S1, adding natural rubber into an internal mixer, mixing for 30S, adding zinc oxide, stearic acid, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N '-diphenyl-p-phenylenediamine, N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine, a coupling agent Si-69, composite paraffin and erucamide, mixing to 80 ℃, adding gas phase white carbon black and carbon black N550, mixing to 160 ℃, and discharging rubber to obtain a section of rubber; wherein, when the mixture is mixed to 120 ℃ and 135 ℃, the top bolts are lifted once respectively for 30 seconds;
S2, after a section of rubber is parked for 16 hours, adding sulfur, N-cyclohexyl-2-benzothiazole sulfenamide, 2-mercaptobenzothiazole and N-cyclohexyl thiophthalimide, mixing to 120 ℃, and discharging rubber to obtain final rubber;
and step S3, molding the final rubber mixture, then sending the molded final rubber mixture into a vulcanizing machine, and vulcanizing the final rubber mixture at 160 ℃ for 12min to obtain a self-lubricating high-durability natural rubber material finished product.
Comparative example 1
Compared with the example 2, the comparative example replaces 30 parts of the white carbon black by the gas phase method and 550 parts of the carbon black N by 550 parts of the carbon black N in the raw materials, and the other raw materials and the preparation method are the same to prepare the common natural rubber material, and the description is omitted here.
Comparative example 2
In this comparative example, 1.5 parts of "2, 4-trimethyl-1, 2-dihydroquinoline polymer," 1.5 parts of N, N ' -diphenyl-p-phenylenediamine, and 1.5 parts of N- (1, 3-dimethylbutyl) -N ' -phenyl-p-phenylenediamine "in the raw materials were replaced with" 4.5 parts of N, N ' -diphenyl-p-phenylenediamine "in comparison with example 2, and the other raw materials and the preparation methods were the same, to prepare a general natural rubber material, and the description thereof will not be repeated here.
The natural rubber materials prepared in examples 1 to 3 and comparative examples 1 to 2 were subjected to performance tests of hardness (GB/T531), strength (GB/T528), elongation (GB/T528), friction coefficient (HG/T2729) and durability, wherein the conditions of the durability performance tests were: the radial force is 1.1 + -7.7 kN, the frequency is 1Hz, and the torsion is + -15 DEG, the frequency is 2Hz. The test data are detailed in table 1 below.
TABLE 1
| Group of | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Hardness/Shore (degree) | 63 | 67 | 65 | 62 | 65 |
| Intensity (MPa) | 23.1 | 24.5 | 21.8 | 19.2 | 22.8 |
| Elongation (%) | 535 | 580 | 545 | 490 | 515 |
| Coefficient of friction | 0.48 | 0.42 | 0.45 | 0.46 | 0.43 |
| Durability (ten thousand times) | 12.9 | 14.4 | 13.6 | 12.7 | 9.5 |
As can be seen from the data in Table 1, the self-lubricating high-durability rubber material can ensure a smaller friction coefficient (less than 0.5), and can obviously improve abnormal sound when applied to an automobile chassis structure; meanwhile, the self-lubricating high-durability rubber material prepared by the invention has excellent mechanical properties (hardness, strength and elongation) and durability on the premise of ensuring low friction coefficient, and has wide application range in automobile chassis.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, 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 present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (5)
1. The self-lubricating high-durability natural rubber material is characterized by comprising the following raw materials in parts by weight: 100 parts of natural rubber, 5-10 parts of zinc oxide, 1-3 parts of stearic acid, 3-6 parts of an anti-aging agent, 2-5 parts of composite paraffin, 3-8 parts of a lubricant, 3-5 parts of a coupling agent, 20-40 parts of fumed silica, N55020-40 parts of carbon black, 1-4 parts of sulfur, 1-4 parts of an accelerator and 0-0.5 part of N-cyclohexyl thiophthalimide; the anti-aging agent is prepared by mixing 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N '-diphenyl-p-phenylenediamine and N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine according to a mass ratio of 1-2:1-2:1-2.
2. The self-lubricating high-durability natural rubber material according to claim 1, wherein: the lubricant is a fatty acid amide lubricant, and specifically is one of oleamide or erucamide.
3. The self-lubricating high-durability natural rubber material according to claim 1, wherein: the accelerator is N-cyclohexyl-2-benzothiazole sulfenamide and 2-mercaptobenzothiazole according to the mass ratio of 1-3: 0-1.
4. The method for preparing the self-lubricating high-durability natural rubber material according to claim 1, comprising the following steps:
Step S1, adding natural rubber into an internal mixer, mixing for 25-30S, adding zinc oxide, stearic acid, an anti-aging agent, a coupling agent, composite paraffin and a lubricant, mixing to 70-80 ℃, adding fumed silica and carbon black N550, mixing to 140-160 ℃, and discharging rubber to obtain a section of rubber;
s2, standing the first rubber segment for 8-16 hours, adding sulfur, an accelerator and N-cyclohexyl thiophthalimide, mixing to 100-120 ℃, and discharging rubber to obtain final rubber;
And step S3, molding the final rubber mixture, and then, feeding the molded final rubber mixture into a vulcanizing machine, and vulcanizing the final rubber mixture at 150-160 ℃ for 12-20min to obtain a self-lubricating high-durability natural rubber material finished product.
5. The method for preparing the self-lubricating high-durability natural rubber material according to claim 4, wherein the method comprises the following steps: in the step S1, the bolts are lifted once respectively at the temperature of 120 ℃ and 135 ℃ for 15-30 seconds.
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| CN202210786314.3A CN115197481B (en) | 2022-07-04 | 2022-07-04 | Self-lubricating high-durability natural rubber material and preparation method thereof |
| PCT/CN2023/080655 WO2024007610A1 (en) | 2022-07-04 | 2023-03-10 | Self-lubricating high-durability natural rubber material and preparation method therefor |
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| CN202210786314.3A CN115197481B (en) | 2022-07-04 | 2022-07-04 | Self-lubricating high-durability natural rubber material and preparation method thereof |
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| CN115197481B true CN115197481B (en) | 2024-06-04 |
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| CN115197481B (en) * | 2022-07-04 | 2024-06-04 | 亚新科噪声与振动技术（安徽）有限公司 | Self-lubricating high-durability natural rubber material and preparation method thereof |
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| JP2022068754A (en) * | 2020-10-22 | 2022-05-10 | 株式会社ブリヂストン | Rubber composition and tire |
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| KR100321637B1 (en) * | 1999-02-05 | 2002-04-10 | 이계안 | Stabilizer bar-bush for automobile |
| US20060130948A1 (en) * | 2004-12-21 | 2006-06-22 | Sandstrom Paul H | Tire support ring |
| KR100802811B1 (en) * | 2006-09-28 | 2008-02-12 | 현대자동차주식회사 | Component of rubber for stabilizer bar bush |
| JP2009001603A (en) * | 2007-06-19 | 2009-01-08 | Bridgestone Corp | Rubber sheet for rubber support coating, and coating material for rubber support |
| CN101775164B (en) * | 2010-02-03 | 2012-05-09 | 上海众力汽车部件有限公司 | Rubber compound for self-lubricating stabilizing bar bushing of automobile chassis |
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| KR102033156B1 (en) * | 2018-01-24 | 2019-10-16 | 평화산업주식회사 | Rubber composition of self-lubricating for bush |
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| JP2022068754A (en) * | 2020-10-22 | 2022-05-10 | 株式会社ブリヂストン | Rubber composition and tire |
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| CN115197481A (en) | 2022-10-18 |
| WO2024007610A1 (en) | 2024-01-11 |
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