CN113087977A - Tread rubber composition with high wear resistance and preparation method thereof - Google Patents
Tread rubber composition with high wear resistance and preparation method thereof Download PDFInfo
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- CN113087977A CN113087977A CN202110465611.3A CN202110465611A CN113087977A CN 113087977 A CN113087977 A CN 113087977A CN 202110465611 A CN202110465611 A CN 202110465611A CN 113087977 A CN113087977 A CN 113087977A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 117
- 239000005060 rubber Substances 0.000 title claims abstract description 117
- 239000000203 mixture Substances 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 59
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 56
- 239000006229 carbon black Substances 0.000 claims abstract description 34
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000011347 resin Substances 0.000 claims abstract description 21
- 229920005989 resin Polymers 0.000 claims abstract description 21
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 19
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 239000013543 active substance Substances 0.000 claims abstract description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 18
- 238000007599 discharging Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 16
- 238000010074 rubber mixing Methods 0.000 claims description 16
- 238000005299 abrasion Methods 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 11
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims description 10
- 239000005062 Polybutadiene Substances 0.000 claims description 9
- 239000003963 antioxidant agent Substances 0.000 claims description 9
- 229920002857 polybutadiene Polymers 0.000 claims description 9
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 9
- 150000002910 rare earth metals Chemical class 0.000 claims description 9
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 claims description 8
- 235000021355 Stearic acid Nutrition 0.000 claims description 8
- IUJLOAKJZQBENM-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)-2-methylpropan-2-amine Chemical compound C1=CC=C2SC(SNC(C)(C)C)=NC2=C1 IUJLOAKJZQBENM-UHFFFAOYSA-N 0.000 claims description 8
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 8
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000008117 stearic acid Substances 0.000 claims description 8
- 239000011787 zinc oxide Substances 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- QAZLUNIWYYOJPC-UHFFFAOYSA-M sulfenamide Chemical group [Cl-].COC1=C(C)C=[N+]2C3=NC4=CC=C(OC)C=C4N3SCC2=C1C QAZLUNIWYYOJPC-UHFFFAOYSA-M 0.000 claims description 6
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 5
- 239000012190 activator Substances 0.000 claims description 5
- WITDFSFZHZYQHB-UHFFFAOYSA-N dibenzylcarbamothioylsulfanyl n,n-dibenzylcarbamodithioate Chemical compound C=1C=CC=CC=1CN(CC=1C=CC=CC=1)C(=S)SSC(=S)N(CC=1C=CC=CC=1)CC1=CC=CC=C1 WITDFSFZHZYQHB-UHFFFAOYSA-N 0.000 claims description 5
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000004971 Cross linker Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 13
- 239000004636 vulcanized rubber Substances 0.000 description 7
- 238000009472 formulation Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000032683 aging Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920002725 thermoplastic elastomer Polymers 0.000 description 5
- 238000004132 cross linking Methods 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- 238000004073 vulcanization Methods 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229940124530 sulfonamide Drugs 0.000 description 2
- 150000003456 sulfonamides Chemical class 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- -1 N, N-dibenzyl thiocarbamoyl disulfide Chemical compound 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 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
- B60C1/0016—Compositions of the tread
-
- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a tread rubber composition with high wear resistance and a preparation method thereof, belongs to the technical field of rubber compositions, and can solve the technical problems of short service life, unsatisfactory wear resistance and the like of the conventional tire. The tread rubber composition comprises the following components in parts by weight: 100 parts of matrix rubber, 45-60 parts of carbon black, 2-3 parts of functional resin, 3-5 parts of anti-aging agent, 4-7 parts of active agent, 1-3 parts of vulcanizing agent and 1-2 parts of accelerator. The preparation method of the tread rubber composition comprises the following steps: the preparation method comprises the steps of preparing a first-stage master batch, preparing a second-stage master batch, preparing a third-stage master batch and preparing the tread rubber composition with high wear resistance. The tread prepared by the tread rubber composition and the preparation method thereof provided by the invention has the characteristics of long service life, high wear resistance and the like.
Description
Technical Field
The invention belongs to the technical field of rubber compositions, and particularly relates to a tread rubber composition with high wear resistance and a preparation method thereof.
Background
With the rapid construction of the highway, the logistics industry is rapidly developed, and long-distance transportation is more and more concentrated, which undoubtedly puts forward a new requirement on the performance of the tire, and requires that the tire has an ultra-long driving mileage on a highway surface, so that the high-speed long-distance tire with longer service life and high wear resistance is more and more favored by people, but the service life of the tire used by the logistics transportation vehicle is found to be poor when statistics is carried out on the service life of the tire.
However, the performances of the tire, such as durability, wear resistance, etc., are closely related to the tread rubber composition, and the durability and wear resistance are also the main performances of the tire, and how to optimize the formula of the rubber composition to prepare a tire with long service life and high wear resistance is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a tread rubber composition with long service life and high wear resistance and a preparation method thereof, aiming at the technical problems of short service life, unsatisfactory wear resistance and the like of a tire in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a tread rubber composition with high wear resistance comprises the following components in parts by weight: 100 parts of matrix rubber, 45-60 parts of carbon black, 2-3 parts of functional resin, 3-5 parts of anti-aging agent, 4-7 parts of active agent, 1-3 parts of vulcanizing agent and 1-2 parts of accelerator.
Preferably, the method comprises the following steps: 100 parts of matrix rubber, 52 parts of carbon black, 3 parts of functional resin, 4 parts of anti-aging agent, 5 parts of activating agent, 1.7 parts of vulcanizing agent and 1 part of accelerator.
Preferably, the matrix rubber comprises 70-80 parts of smoked sheet rubber, and the balance of rare earth butadiene rubber. .
Preferably, the carbon black is N134 carbon black, the functional resin is dicyclopentadiene, and the ring and ball softening point of the dicyclopentadiene is 95-115 ℃.
Preferably, the anti-aging agent is a mixture of p-phenylenediamine antiozonants, quinoline anti-aging agents and monomodal microcrystalline protective wax.
Preferably, the active agent comprises 2-4 parts of indirect zinc oxide, and the balance is stearic acid.
Preferably, the accelerator is sulfenamide accelerator TBBS, and the sulfur is a mixture of common sulfur and a multifunctional crosslinking agent.
Preferably, the multifunctional crosslinker is 1,6 bis (N, N-dibenzylthiocarbamoyldisulfide) hexane.
The invention also provides a preparation method of the tread rubber composition with high wear resistance, which comprises the following steps:
preparation of a first-stage master batch: adding all the matrix rubber, the functional resin, the activator, the accelerator and a certain weight part of carbon black into a closed rubber mixing mill according to the weight part ratio, mixing for 4-10min at the temperature of 155-165 ℃, discharging rubber to obtain a section of master batch, and standing for 8-10 h;
preparation of a second-stage master batch: adding the parked primary master batch, an anti-aging agent and a certain weight part of carbon black into a closed rubber mixing mill, mixing for 3-4min at 145-155 ℃, discharging rubber to obtain a secondary master batch, and parking for 8-10 h;
three-stage masterbatch preparation: adding the parked second-stage master batch into a closed rubber mixing mill, mixing for 3-4min at the temperature of 140-150 ℃, discharging rubber to obtain a third-stage master batch, and parking for 8-10 h;
preparation of a tread rubber composition having high abrasion resistance: and adding the parked three-section master batch and a vulcanizing agent into a closed rubber mixing mill, mixing for 2-3min at the temperature of 100-105 ℃, and discharging rubber to obtain the tread rubber composition with high wear resistance.
Preferably, the rubber discharging temperature in the steps of preparing the first-stage master batch, preparing the second-stage master batch, preparing the third-stage master batch and preparing the tread rubber composition with high wear resistance is 160-170 ℃, 140-150 ℃, 145-150 ℃ and 100-110 ℃ respectively;
the carbon black is added in the first-stage masterbatch preparation step by 35-40 parts by weight, and the carbon black is added in the second-stage masterbatch preparation step by 10-20 parts by weight.
Compared with the prior art, the invention has the advantages and positive effects that:
1. the invention provides a tread rubber composition with high wear resistance, which is prepared by adjusting the types and the proportions of the added components in the formula of the rubber composition, and has long service life and ideal wear resistance;
2. the invention provides a tread rubber composition with high wear resistance and a preparation method thereof, the tread wear performance prepared by the process and the preparation method is greatly improved, the DIN wear index is more than 180, the service life of a tire is prolonged, and the withdrawal rate is reduced;
3. the invention provides a preparation method of a tread rubber composition with high wear resistance, and the process method is simple and convenient to operate and is beneficial to industrial production.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the 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.
The embodiment of the invention provides a tread rubber composition with high wear resistance, which comprises the following components in parts by weight: 100 parts of matrix rubber, 45-60 parts of carbon black, 2-3 parts of functional resin, 3-5 parts of anti-aging agent, 4-7 parts of active agent, 1-3 parts of vulcanizing agent and 1-2 parts of accelerator.
In the embodiments, the invention provides a tread rubber composition with high wear resistance, and the tread rubber composition with long service life and ideal wear resistance is prepared by adjusting the types and the proportions of the added components in the rubber composition formula.
In a preferred embodiment, the composition comprises the following components in parts by weight: 100 parts of matrix rubber, 52 parts of carbon black, 3 parts of functional resin, 4 parts of anti-aging agent, 5 parts of activating agent, 1.7 parts of vulcanizing agent and 1 part of accelerator.
In a preferred embodiment, the matrix rubber comprises 70-80 parts by weight of smoked sheet rubber, and the balance of rare earth butadiene rubber.
In the above preferred embodiment, the reason why the above two rubbers are selected as the base rubber is that: the smoked sheet adhesive has the characteristics of good reinforcing property and the like, and can provide higher strength; the rare earth butadiene rubber has the characteristics of high strength, flex resistance, low heat generation, wet skid resistance, low rolling resistance and the like.
In a preferred embodiment, the carbon black is N134 carbon black, the functional resin is dicyclopentadiene, and the ring and ball softening point is 95-115 ℃.
In the above preferred embodiment, dicyclopentadiene having a ring and ball softening point of 95 ℃ to 115 ℃ is selected as the functional resin for the reason that: the functional resin has certain reinforcing effect, and can improve the reversion resistance, hot air aging resistance and abrasion resistance index of vulcanized rubber.
In a preferred embodiment, the antioxidant is a mixture of p-phenylenediamine antiozonants, quinoline antioxidants and monomodal microcrystalline protective wax, and specifically, in parts by weight, the amounts of the above three antioxidants can be selected in the actual preparation process: 2 parts of p-phenylenediamine antiozonants, 1 part of quinoline antioxidants and 1 part of monomodal microcrystalline protective wax or properly adjusting the dosage according to actual needs are within the protection scope of the invention.
In the preferred embodiment, the three antioxidants are selected for the reasons: the p-phenylenediamine antiozonant has excellent protection effect on ozone and flex fatigue aging, the quinoline antioxidant has good protection effect on thermal oxidation aging, the single-peak microcrystalline wax belongs to a physical antioxidant, and can be sprayed out of the surface of a product after being added into rubber, so that ozone aging can be effectively prevented.
In a preferred embodiment, the active agent comprises 2-4 parts of indirect zinc oxide, and the balance is stearic acid.
In a preferred embodiment, the accelerator is a sulfenamide accelerator TBBS, and the sulfur is a mixture of ordinary sulfur and a multifunctional crosslinking agent.
In a preferred embodiment, the multifunctional crosslinker is 1,6 bis (N, N-dibenzylthiocarbamoyldisulfide) hexane.
In the preferred embodiment described above, the reason for selecting the above-mentioned crosslinking agent is that: the cross-linking agent can improve the reversion resistance, physical property, dynamic mechanical property, wear resistance and other properties of the rubber material.
The invention also provides a preparation method of the tread rubber composition with high wear resistance, which comprises the following steps:
s1, preparing a primary master batch: adding all the matrix rubber, the functional resin, the activator, the accelerator and a certain weight part of carbon black into a closed rubber mixing mill according to the weight part ratio, mixing for 4-10min at the temperature of 155-165 ℃, discharging rubber to obtain a section of master batch, and standing for 8-10 h;
s2, preparing a secondary master batch: adding the parked primary master batch, an anti-aging agent and a certain weight part of carbon black into a closed rubber mixing mill, mixing for 3-4min at 145-155 ℃, discharging rubber to obtain a secondary master batch, and parking for 8-10 h;
s3, three-stage master batch preparation: adding the parked second-stage master batch into a closed rubber mixing mill, mixing for 3-4min at the temperature of 140-150 ℃, discharging rubber to obtain a third-stage master batch, and parking for 8-10 h;
s4 preparation of a tread rubber composition with high wear resistance: and adding the parked three-section master batch and a vulcanizing agent into a closed rubber mixing mill, mixing for 2-3min at the temperature of 100-105 ℃, and discharging rubber to obtain the tread rubber composition with high wear resistance.
In the above method for producing a tread rubber composition, the reason why the manner of adding carbon black is divided is that: the dispersion of the carbon black in the rubber material is facilitated, so that various physical properties of the rubber material are more stable;
the reason for adding the anti-aging agent to the secondary masterbatch is that: the method can prevent the poor dispersity of the rubber material and further influence on the performance of the rubber material due to uneven mixing caused by excessive compounding ingredients in the preparation of a section of master batch.
In a preferred embodiment, the rubber discharge temperature in the steps of the first-stage masterbatch preparation, the second-stage masterbatch preparation, the third-stage masterbatch preparation and the tread rubber composition preparation with high wear resistance is 160-170 ℃, 140-150 ℃, 145-150 ℃ and 100-110 ℃ respectively;
the carbon black is added in the first-stage masterbatch preparation step by 35-40 parts by weight, and the carbon black is added in the second-stage masterbatch preparation step by 10-20 parts by weight.
In order to more clearly and specifically describe a tread rubber composition having high wear resistance and a method for preparing the same according to embodiments of the present invention, the following description will be given with reference to specific examples.
Example 1
The embodiment provides a tread rubber composition with high wear resistance and a preparation method thereof, and the preparation method specifically comprises the following steps:
the rubber composition formula comprises:
the composition comprises the following components in parts by weight: 70 parts of smoked sheet rubber, 30 parts of rare earth butadiene rubber, 52 parts of N134 carbon black, 4 parts of indirect-process zinc oxide, 1 part of stearic acid, 4 parts of an anti-aging agent, 3 parts of functional resin dicyclopentadiene, 1 part of common sulfur, 0.7 part of multifunctional crosslinking agent-1, 6 bis (N, N-dibenzylthiocarbamoyl disulfide) hexane and 1 part of sulfenamide accelerator TBBS.
The preparation method comprises the following steps:
(1) preparation of a first-stage master batch: adding all the matrix rubber, the functional resin, the activator, the accelerator and 40 parts by weight of carbon black into a closed rubber mixing mill according to the weight parts, mixing for 4min at 155 ℃, discharging rubber at 155 ℃, obtaining a section of master batch, and standing for 8 h;
(2) preparation of a second-stage master batch: adding the parked primary master batch, the anti-aging agent and 12 parts by weight of carbon black into a closed rubber mixing mill, mixing for 4min at 145 ℃, discharging rubber to obtain secondary master batch, and parking for 8 h;
(3) three-stage masterbatch preparation: adding the parked second-stage master batch into a closed rubber mixing mill, mixing for 4min at 140 ℃, discharging rubber to obtain a third-stage master batch, and parking for 8 h;
(4) preparation of a tread rubber composition having high abrasion resistance: adding the parked three-section master batch and a vulcanizing agent into a closed rubber mixing mill, mixing for 2min at 100 ℃, and discharging rubber to prepare the tread rubber composition with high wear resistance, namely final rubber;
(5) and (3) pressing the final rubber prepared in the step (4) into a rubber sheet with the thickness of 2.0mm by using a small open mill, standing for 6 hours to obtain a test sample, and vulcanizing for 30min at 151 ℃ by using a steam flat vulcanizing agent for later use.
Example 2
The rubber composition formula comprises:
the composition comprises the following components in parts by weight: 80 parts of smoked sheet rubber, 20 parts of rare earth butadiene rubber, 52 parts of N134 carbon black, 4 parts of indirect-process zinc oxide, 1 part of stearic acid, 4 parts of an anti-aging agent, 3 parts of functional resin dicyclopentadiene, 1 part of common sulfur, 0.7 part of multifunctional crosslinking agent-1, 6 bis (N, N-dibenzylthiocarbamoyl disulfide) hexane and 1 part of sulfenamide accelerator TBBS.
The preparation method comprises the following steps: the preparation method is the same as that of example 1.
Comparative example 1
The comparative example provides a tread rubber composition and a preparation method thereof, and specifically comprises the following steps:
the rubber composition formula comprises:
the composition comprises the following components in parts by weight: 70 parts of smoked sheet rubber, 30 parts of rare earth butadiene rubber, 52 parts of N134 carbon black, 4 parts of indirect zinc oxide, 1 part of stearic acid, 4 parts of anti-aging agent, 1.1 parts of common sulfur and 1.6 parts of sulfenamide accelerator TBBS.
The preparation method comprises the following steps: the preparation method is the same as that of example 1.
Comparative example 2
The comparative example provides a tread rubber composition and a preparation method thereof, and specifically comprises the following steps:
the rubber composition formula comprises:
the composition comprises the following components in parts by weight: 70 parts of smoked sheet rubber, 30 parts of rare earth butadiene rubber, 52 parts of N134 carbon black, 4 parts of indirect-process zinc oxide, 1 part of stearic acid, 4 parts of anti-aging agent, 3 parts of functional resin dicyclopentadiene, 1.1 parts of common sulfur and 1.6 parts of sulfonamide accelerator TBBS.
The preparation method comprises the following steps: the preparation method is the same as that of example 1.
Comparative example 3
The comparative example provides a tread rubber composition and a preparation method thereof, and specifically comprises the following steps:
the rubber composition formula comprises:
the composition comprises the following components in parts by weight: 70 parts of smoked sheet rubber, 30 parts of rare earth butadiene rubber, 52 parts of N134 carbon black, 4 parts of indirect-process zinc oxide, 1 part of stearic acid, 4 parts of an anti-aging agent, 1 part of common sulfur, 0.7 part of multifunctional cross-linking agent-1, 6 bis (N, N-dibenzyl thiocarbamoyl disulfide) hexane and 1 part of sulfonamide accelerator TBBS.
The preparation method comprises the following steps: the preparation method is the same as that of example 1.
The rubber compositions of the above examples and comparative examples are formulated as shown in the following table:
TABLE 1 rubber composition formulations shown in examples 1 to 2 and comparative examples 1 to 3
Performance testing
The rubber sheets prepared in the above examples and comparative examples were also tested for vulcanization characteristics, hardness, tear strength, tensile stress strain, abrasion resistance, etc., and the test methods and test results are as follows:
the test method comprises the following steps:
measuring the vulcanization characteristic of the film according to the national standard GB/T16584-1996 'vulcanization characteristic measurement for rubber by rotor-free vulcanizer'; according to the national standard GB/T531.1-2008 "method for testing press-in hardness of vulcanized rubber or thermoplastic rubber part 1: measuring the hardness of the rubber sheet by a Shore durometer method (Shore hardness); the density of the film is measured according to the national standard GB/T533-2008 'determination of the density of vulcanized rubber or thermoplastic rubber'; determining the tensile stress strain performance of the film according to the national standard GB/T528-2009 determination of the tensile stress strain performance of vulcanized rubber or thermoplastic rubber; the tearing strength of the film is measured according to the national standard GB/T529-2008 'determination of tearing strength of vulcanized rubber and thermoplastic rubber'; the rebound performance of the rubber sheet is measured according to the national standard GB/T1681-2009 determination of rebound resilience of vulcanized rubber; the abrasion resistance of the rubber sheet is measured according to national standard GB/T9867-2008 "measurement of abrasion resistance of vulcanized rubber or thermoplastic rubber (rotating drum type abrasion machine method)", and the test results are shown in the following table:
TABLE 2 film property test results obtained in examples and comparative examples
From the data in the above table, it can be seen that the film formulation of comparative example 1 is not added with functional resin and multifunctional cross-linking agent, the film formulation of comparative example 2 is not added with multifunctional cross-linking agent, the film formulation of comparative example 3 is not added with functional resin, the film formulations and the preparation methods provided by comparative examples 1-3 are used to prepare films that have less than ideal hardness and wear resistance, while the film formulations and the preparation methods provided by examples 1-2 of the present invention are used to prepare films that have significantly improved hardness and DIN abrasion index, and the abrasion resistance of example 1 is optimal, and the abrasion resistance after aging treatment can still be kept optimal. Therefore, the rubber composition with a reasonable formula is obtained by adjusting the types and the proportions of the added components in the formula of the rubber composition, the wear performance of the tread prepared by the formula and the preparation method is greatly improved, the DIN wear index is more than 180, the service life of the tire is prolonged, and the withdrawal rate is reduced.
Claims (10)
1. A tread rubber composition with high wear resistance is characterized by comprising the following components in parts by weight: 100 parts of matrix rubber, 45-60 parts of carbon black, 2-3 parts of functional resin, 3-5 parts of anti-aging agent, 4-7 parts of active agent, 1-3 parts of vulcanizing agent and 1-2 parts of accelerator.
2. The tread rubber composition with high wear resistance according to claim 1, characterized by comprising, in parts by weight: 100 parts of matrix rubber, 52 parts of carbon black, 3 parts of functional resin, 4 parts of anti-aging agent, 5 parts of activating agent, 1.7 parts of vulcanizing agent and 1 part of accelerator.
3. The tread rubber composition with high wear resistance according to claim 1, wherein the base rubber comprises 70 to 80 parts by weight of smoked sheet rubber and the balance rare earth butadiene rubber.
4. The tread rubber composition with high wear resistance as claimed in claim 1, wherein the carbon black is N134 carbon black and the functional resin is dicyclopentadiene with a ring and ball softening point of 95 ℃ to 115 ℃.
5. The tread rubber composition having high abrasion resistance according to claim 1, wherein the antioxidant is a mixture of p-phenylenediamine antiozonants, quinoline antioxidants and monomodal microcrystalline protective wax.
6. The tread rubber composition with high wear resistance of claim 1, wherein the activator comprises 2-4 parts of indirect zinc oxide, the balance being stearic acid.
7. The tread rubber composition with high wear resistance according to claim 1, wherein the accelerator is a sulfenamide accelerator TBBS and the sulfur is a mixture of ordinary sulfur and a multifunctional crosslinking agent.
8. The tread rubber composition with high wear resistance of claim 7, wherein the multifunctional crosslinker is 1,6 bis (N, N-dibenzylthiocarbamoyldisulfide) hexane.
9. A method for producing a tread rubber composition having high wear resistance as recited in any one of claims 1 to 8, comprising the steps of:
preparation of a first-stage master batch: adding all the matrix rubber, the functional resin, the activator, the accelerator and a certain weight part of carbon black into a closed rubber mixing mill according to the weight part ratio, mixing for 4-10min at the temperature of 155-165 ℃, discharging rubber to obtain a section of master batch, and standing for 8-10 h;
preparation of a second-stage master batch: adding the parked primary master batch, an anti-aging agent and a certain weight part of carbon black into a closed rubber mixing mill, mixing for 3-4min at 145-155 ℃, discharging rubber to obtain a secondary master batch, and parking for 8-10 h;
three-stage masterbatch preparation: adding the parked second-stage master batch into a closed rubber mixing mill, mixing for 3-4min at the temperature of 140-150 ℃, discharging rubber to obtain a third-stage master batch, and parking for 8-10 h;
preparation of a tread rubber composition having high abrasion resistance: and adding the parked three-section master batch and a vulcanizing agent into a closed rubber mixing mill, mixing for 2-3min at the temperature of 100-105 ℃, and discharging rubber to obtain the tread rubber composition with high wear resistance.
10. The method for producing a tread rubber composition having high abrasion resistance according to claim 9, wherein the rubber discharge temperatures in the steps of the first-stage masterbatch preparation, the second-stage masterbatch preparation, the third-stage masterbatch preparation and the tread rubber composition having high abrasion resistance are 160 ℃ to 170 ℃, 140 ℃ to 150 ℃, 145 ℃ to 150 ℃ and 100 ℃ to 110 ℃, respectively;
the carbon black is added in the first-stage masterbatch preparation step by 35-40 parts by weight, and the carbon black is added in the second-stage masterbatch preparation step by 10-20 parts by weight.
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