CN116041804A - Sidewall rubber composition for pneumatic off-road tire and preparation method thereof - Google Patents
Sidewall rubber composition for pneumatic off-road tire and preparation method thereof Download PDFInfo
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 45
- 239000005060 rubber Substances 0.000 title claims abstract description 45
- 239000000203 mixture Substances 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000003063 flame retardant Substances 0.000 claims abstract description 35
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000007822 coupling agent Substances 0.000 claims abstract description 13
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 229920001084 poly(chloroprene) Polymers 0.000 claims abstract description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 6
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 5
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 5
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 5
- 229920001194 natural rubber Polymers 0.000 claims abstract description 5
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 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 abstract description 3
- QUGODTRVZDNSRF-UHFFFAOYSA-N 4-n-(2,3-dimethylphenyl)benzene-1,4-diamine Chemical compound CC1=CC=CC(NC=2C=CC(N)=CC=2)=C1C QUGODTRVZDNSRF-UHFFFAOYSA-N 0.000 claims abstract description 3
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000006229 carbon black Substances 0.000 claims abstract description 3
- 239000004200 microcrystalline wax Substances 0.000 claims abstract description 3
- 235000019808 microcrystalline wax Nutrition 0.000 claims abstract description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000008117 stearic acid Substances 0.000 claims abstract description 3
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 3
- 239000011593 sulfur Substances 0.000 claims abstract description 3
- 239000011787 zinc oxide Substances 0.000 claims abstract description 3
- 239000000945 filler Substances 0.000 claims description 12
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 10
- 239000000347 magnesium hydroxide Substances 0.000 claims description 10
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 10
- 230000003712 anti-aging effect Effects 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 7
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical group [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- -1 polyoxy silane Polymers 0.000 claims description 2
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 2
- UKRDPEFKFJNXQM-UHFFFAOYSA-N vinylsilane Chemical compound [SiH3]C=C UKRDPEFKFJNXQM-UHFFFAOYSA-N 0.000 claims description 2
- 239000001993 wax Substances 0.000 claims description 2
- 239000003963 antioxidant agent Substances 0.000 claims 1
- 230000003078 antioxidant effect Effects 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract description 13
- 238000011049 filling Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229920003051 synthetic elastomer Polymers 0.000 abstract description 2
- 239000005061 synthetic rubber Substances 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000012796 inorganic flame retardant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 1
- ZZMVLMVFYMGSMY-UHFFFAOYSA-N 4-n-(4-methylpentan-2-yl)-1-n-phenylbenzene-1,4-diamine Chemical group C1=CC(NC(C)CC(C)C)=CC=C1NC1=CC=CC=C1 ZZMVLMVFYMGSMY-UHFFFAOYSA-N 0.000 description 1
- OFSKXZRDPWVERQ-UHFFFAOYSA-N [Cl].[Sb] Chemical compound [Cl].[Sb] OFSKXZRDPWVERQ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- IUJLOAKJZQBENM-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-2-methylpropan-2-amine Chemical group C1=CC=C2SC(SNC(C)(C)C)=NC2=C1 IUJLOAKJZQBENM-UHFFFAOYSA-N 0.000 description 1
- ODUCDPQEXGNKDN-UHFFFAOYSA-N nitroxyl Chemical compound O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical compound [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- NFMWFGXCDDYTEG-UHFFFAOYSA-N trimagnesium;diborate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]B([O-])[O-].[O-]B([O-])[O-] NFMWFGXCDDYTEG-UHFFFAOYSA-N 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0025—Compositions of the sidewalls
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a sidewall rubber composition for a pneumatic off-road tire and a preparation method thereof, belonging to the field of tire production. The raw materials comprise the following components in parts by weight: 20-50 parts of natural rubber, 20-50 parts of butadiene rubber, 0-30 parts of ethylene propylene diene monomer, 0-30 parts of chloroprene rubber, 30-50 parts of high wear-resistant carbon black, 0-10 parts of environment-friendly oil, 0-4 parts of coupling agent, 80-180 parts of flame retardant package, 3-6 parts of nano zinc oxide, 0-3,2,2,4 parts of stearic acid, 0-3,2,2,4 parts of N, N' -xylyl p-phenylenediamine, 0-3 parts of trimethyl-1, 2-dihydroquinoline polymer, 1-4 parts of microcrystalline wax, 0.5-2.0 parts of sulfur and 0.5-2.0 parts of accelerator. According to the invention, the flame-retardant package formed by adding different types of flame retardants is used together by using a raw rubber system with a special function, the special functions of different synthetic rubbers are utilized to play roles in ageing resistance and flame retardance of the composition, and meanwhile, the performance requirements on the sidewall composition are met by adjusting a filling system, a raw rubber system and a protection system of the composition.
Description
Technical Field
The invention relates to the field of production of pneumatic off-road tires, in particular to a sidewall rubber composition with multiple protection functions for the pneumatic off-road tires and a preparation method thereof.
Background
It is well known that the sidewalls of a tire are located on the outer surface of the tire and function to protect the carcass armature. The pneumatic off-road tire has a severe service environment, and is subjected to the flame retardant function of special scenes such as fire vehicles in fire scenes and industrial vehicles in coking and other operating environments besides the common heat resistance, oxygen and ozone erosion functions. In the prior art, the aging resistance of the tire is considered only by adding an anti-aging agent.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a rubber composition with a certain flame retardant and aging resistance and multiple protection functions for a pneumatic off-road tire.
The technical scheme adopted for solving the technical problems is as follows: a sidewall rubber composition for pneumatic off-road tires comprises the following raw materials in parts by weight:
the weight ratio of the natural rubber to the butadiene rubber to the ethylene propylene diene monomer to the chloroprene rubber is about 2-4: 2 to 4:0 to 2:0 to 2.
The flame-retardant package is zinc borate, aluminum hydroxide and magnesium hydroxide, and the weight ratio of the flame-retardant package is about 1 to 3:3 to 5:2 to 4.
The flame retardant is modified by a coupling agent, and the specific operation mode is as follows:
(1) Weighing filler and adding the filler into a stirrer;
(2) Weighing a coupling agent, wherein the adding amount is 1% -3% of the using amount of the flame retardant, and adding the coupling agent into a stirrer through a spraying device;
(3) Stirring at high speed for 2-5min;
(4) Taking out the treated filler, adding the filler into a drying box, and drying for 20-30min at 105-120 ℃.
The coupling agent is one of polyoxy silane, vinyl silane and amino silane.
The anti-aging agent is any one of 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N, N' -xylyl p-phenylenediamine and microcrystalline wax, or is formed by combining any two or three of the three.
A method for preparing a final rubber compound using the sidewall rubber composition for pneumatic off-road tires, comprising the steps of:
(1) Plasticating rubber in an internal mixer for 20-50 seconds, wherein the rotating speed of the internal mixer is 30-60 rpm;
(2) Adding carbon black, environment-friendly oil, zinc oxide, stearic acid, a pretreated flame-retardant package, an anti-aging agent and wax for mixing;
(3) Lifting the top bolt when the temperature in the internal mixer reaches 120-125 ℃, and then pressing the top bolt;
(4) When the temperature in the internal mixer reaches 140-160 ℃, rubber discharging is carried out to obtain a section of mixed master batch;
(5) Adding the cooled primary master batch and sulfur/accelerator into an internal mixer;
(6) Lifting the top bolt when the temperature in the internal mixer reaches 70-85 ℃, and then pressing the top bolt;
(7) When the temperature in the internal mixer reaches 100-115 ℃, the final rubber is obtained after rubber discharging.
The invention has the beneficial effects that the flame-retardant package formed by adding different types of flame retardants through the combination of the raw rubber system with special functions plays roles in ageing resistance and flame retardance of the composition by utilizing the special functions of different synthetic rubbers, and simultaneously, the performance requirements on the sidewall composition are met by adjusting the filling system, the raw rubber system and the protection system of the composition.
Detailed Description
The invention is further described below with reference to examples:
the natural rubber is 20# standard rubber, the butadiene rubber adopts BR9000, ethylene propylene diene monomer is 2070, neoprene is NS232, p-phenylenediamine anti-aging agent is N- (1, 3-dimethylbutyl) -N' -phenyl p-phenylenediamine, ketoamine anti-aging agent is 2, 4-trimethyl-dihydroquinoline polymer, sulfenamide accelerator is N-tertiary butyl-2-benzothiazole sulfenamide, and the flame retardant package comprises aluminum hydroxide, magnesium hydroxide and zinc borate.
The technical scheme adopted by the invention for solving the technical problems is as follows: compared with the common tire rubber composition, the rubber composition has the advantages that ethylene propylene diene monomer rubber with high thermal stability and ageing resistance is used in a raw rubber system, the flame-retardant and ageing-resistant chloroprene rubber is used in a flame-retardant bag, environment-friendly aluminum hydroxide, magnesium hydroxide and magnesium borate are adopted in the flame-retardant bag, and the inorganic flame retardant is improved in dispersion in the rubber by adopting a coupling agent to pretreat the flame retardant, so that the physical and mechanical properties of the flame-retardant rubber material are improved, and the performance requirements of the tire are met, and the specific table I is shown.
Table I and examples (the raw materials in the Table I are in parts by weight)
The technical principle of the invention is to fully utilize the performances of different rubber types, and the invention is as follows:
1. the natural rubber has high tensile strength and good viscosity;
2. butadiene rubber has low heat generation and excellent bending resistance;
3. the ethylene propylene diene monomer has good thermal stability, the thermal decomposition temperature is 415 ℃, the saturation is high, the ethylene propylene diene monomer is not easy to be attacked by oxygen and ozone, the aging resistance is excellent, and the use amount of an anti-aging agent can be not added or reduced after part of ethylene propylene diene monomer is added;
4. the neoprene has good flame retardant property, high limiting oxygen index, inactive molecular structure and excellent ageing resistance.
By combining the four rubbers, the functional advantages of the rubber are fully utilized, and the deficiency of the rubber is overcome, so that the performance requirements of the sidewall composition on flame retardance and ageing resistance are met.
The flame retardant comprises three flame retardants of zinc borate, aluminum hydroxide and magnesium hydroxide:
1. the flame retardant mechanism of zinc borate is that the zinc borate is melted and then covered on the surface, so as to play a role in isolating oxygen;
2. aluminum hydroxide (ATH) and Magnesium Hydroxide (MH) belong to common hydroxide flame retardants, are typical inorganic flame retardants, and have the flame retardant action mechanism that the flame retardants decompose and remove bound water after being heated, the evaporation of water can largely absorb heat released in the combustion process, the flame temperature of a polymer is reduced, the further degradation of the polymer can be effectively inhibited, and flammable gas generated by the combustion of the polymer can be cooled and diluted. The ATH has lower thermal decomposition temperature (235-350 ℃) and obvious effect in the starting stage of combustion, while the MH has higher decomposition temperature (340-390 ℃) and has good promotion effect on the char formation of the polymer and the improvement of the oxygen index. The two components are matched for use, so that the mutual supplementing effect can be achieved, and a good flame-retardant effect is achieved;
3. ATH and MH are both inorganic fillers, while the polymeric materials are basically organic polymers, and the compatibility of the two is not very ideal, and when the amount is too large, the mechanical properties of the materials are easily degraded seriously, so that the modification is necessary. The invention adopts a coupling agent for modification, and the specific operation modes are as follows:
(1) Weighing filler and adding the filler into a stirrer;
(2) Weighing the coupling agent, and adding the coupling agent into a stirrer through a spraying device:
(3) Stirring at high speed for 2-5min
(4) Taking out the treated filler, adding the filler into a drying box, and drying for 20-30min at 105-120 ℃.
4. Zinc borate, aluminum hydroxide and magnesium hydroxide belong to inorganic flame retardants, so that smoke and toxic gases produced during polymer combustion can be reduced and inhibited, and secondary disasters can be reduced.
The ethylene propylene diene monomer and the chloroprene rubber have excellent ageing resistance, and can reduce or eliminate the use of an anti-ageing agent, thereby reducing the production cost and reducing the color change pollution caused by the anti-ageing agent.
The performance test data of the embodiment of the invention are shown in a second table.
And (II) table: performance test data
The invention has the advantages that: by adopting different types of rubber for use, the synergistic effect of the respective advantage performance and the flame retardants with different use characteristics is fully utilized, and the raw rubber, the protection system and the filling system are regulated to obtain the ageing-resistant and flame-retardant sidewall rubber composition, and the ageing-resistant performance of the sidewall rubber is superior to that of the common sidewall rubber through a weather ageing test, and the flame-retardant grade reaches FV-0 grade. Meanwhile, due to the use of the inorganic flame retardant, toxic gas and smoke brought by the traditional chlorine-antimony flame retardant system during combustion can be avoided, and the flame retardant rubber composition has the dual functions of flame retardance and smoke suppression, and is an environment-friendly flame retardant rubber composition.
Claims (7)
1. A sidewall rubber composition for a pneumatic off-road tire is characterized by comprising the following raw materials in parts by weight:
2. the sidewall rubber composition for off-road tire according to claim 1, wherein the weight ratio of the natural rubber, butadiene rubber, ethylene propylene diene monomer rubber, neoprene rubber is about 2 to 4:2 to 4:0 to 2:0 to 2.
3. The sidewall rubber composition for off-road tire according to claim 1, wherein the flame retardant package is zinc borate, aluminum hydroxide, magnesium hydroxide, in a weight ratio of about 1 to 3:3 to 5:2 to 4.
4. The sidewall rubber composition for off-road tire according to claim 1, wherein the flame retardant is modified by a coupling agent in the following specific operation modes:
(1) Weighing filler and adding the filler into a stirrer;
(2) Weighing a coupling agent, wherein the adding amount is 1% -3% of the using amount of the flame retardant, and adding the coupling agent into a stirrer through a spraying device;
(3) Stirring at high speed for 2-5min;
(4) Taking out the treated filler, adding the filler into a drying box, and drying for 20-30min at 105-120 ℃.
5. The sidewall rubber composition for off-road tire according to claim 1, wherein the coupling agent is one of polyoxy silane, vinyl silane and amino silane.
6. The sidewall rubber composition for pneumatic off-road tires according to claim 1, wherein the antioxidant is any one of or a combination of any two or three of 2, 4-trimethyl-1, 2-dihydroquinoline polymer, N' -xylyl-p-phenylenediamine and microcrystalline wax.
7. A method of preparing a final rubber compound using the sidewall rubber composition for off-road pneumatic tires of claim 1, comprising the steps of:
a. plasticating rubber in an internal mixer for 20-50 seconds, wherein the rotating speed of the internal mixer is 30-60 rpm;
b. adding carbon black, environment-friendly oil, zinc oxide, stearic acid, a pretreated flame-retardant package, an anti-aging agent and wax for mixing;
c. lifting the top bolt when the temperature in the internal mixer reaches 120-125 ℃, and then pressing the top bolt;
d. when the temperature in the internal mixer reaches 140-160 ℃, rubber discharging is carried out to obtain a section of mixed master batch;
e. adding the cooled primary master batch and sulfur/accelerator into an internal mixer;
f. lifting the top bolt when the temperature in the internal mixer reaches 70-85 ℃, and then pressing the top bolt;
g. when the temperature in the internal mixer reaches 100-115 ℃, the final rubber is obtained after rubber discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211702856.4A CN116041804A (en) | 2022-12-29 | 2022-12-29 | Sidewall rubber composition for pneumatic off-road tire and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211702856.4A CN116041804A (en) | 2022-12-29 | 2022-12-29 | Sidewall rubber composition for pneumatic off-road tire and preparation method thereof |
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| CN116041804A true CN116041804A (en) | 2023-05-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104672509A (en) * | 2013-11-27 | 2015-06-03 | 四川轮胎橡胶（集团）股份有限公司 | Export tyre special-purpose sidewall rubber |
| WO2015109792A1 (en) * | 2014-01-23 | 2015-07-30 | 怡维怡橡胶研究院有限公司 | Method for improving elasticity and heat build-up performance of rubber product |
| CN105061832A (en) * | 2015-08-26 | 2015-11-18 | 青岛双星轮胎工业有限公司 | Rubber composition for sidewall of fire fighting truck |
| CN113637240A (en) * | 2021-08-13 | 2021-11-12 | 怡维怡橡胶研究院有限公司 | Anti-aging and anti-discoloration color tire sidewall rubber and preparation method thereof |
-
2022
- 2022-12-29 CN CN202211702856.4A patent/CN116041804A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104672509A (en) * | 2013-11-27 | 2015-06-03 | 四川轮胎橡胶（集团）股份有限公司 | Export tyre special-purpose sidewall rubber |
| WO2015109792A1 (en) * | 2014-01-23 | 2015-07-30 | 怡维怡橡胶研究院有限公司 | Method for improving elasticity and heat build-up performance of rubber product |
| CN105061832A (en) * | 2015-08-26 | 2015-11-18 | 青岛双星轮胎工业有限公司 | Rubber composition for sidewall of fire fighting truck |
| CN113637240A (en) * | 2021-08-13 | 2021-11-12 | 怡维怡橡胶研究院有限公司 | Anti-aging and anti-discoloration color tire sidewall rubber and preparation method thereof |
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