CN112940360A - Tire tread rubber with tear resistance and all-steel radial tire - Google Patents
Tire tread rubber with tear resistance and all-steel radial tire Download PDFInfo
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- CN112940360A CN112940360A CN202110396185.2A CN202110396185A CN112940360A CN 112940360 A CN112940360 A CN 112940360A CN 202110396185 A CN202110396185 A CN 202110396185A CN 112940360 A CN112940360 A CN 112940360A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 82
- 239000005060 rubber Substances 0.000 title claims abstract description 82
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 15
- 239000010959 steel Substances 0.000 title claims abstract description 15
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000000126 substance Substances 0.000 claims abstract description 23
- 239000004014 plasticizer Substances 0.000 claims abstract description 22
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 21
- 229920001194 natural rubber Polymers 0.000 claims abstract description 21
- 239000003208 petroleum Substances 0.000 claims abstract description 19
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000006229 carbon black Substances 0.000 claims abstract description 14
- 239000013543 active substance Substances 0.000 claims abstract description 11
- 239000006235 reinforcing carbon black Substances 0.000 claims abstract description 11
- 238000004073 vulcanization Methods 0.000 claims abstract description 11
- 230000007123 defense Effects 0.000 claims abstract description 7
- 239000003963 antioxidant agent Substances 0.000 claims description 18
- 230000003712 anti-aging effect Effects 0.000 claims description 16
- 230000003078 antioxidant effect Effects 0.000 claims description 14
- 239000004200 microcrystalline wax Substances 0.000 claims description 7
- 235000019808 microcrystalline wax Nutrition 0.000 claims description 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 4
- ODUCDPQEXGNKDN-UHFFFAOYSA-N nitroxyl Chemical compound O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 claims description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 4
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 239000008117 stearic acid Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 239000011593 sulfur Substances 0.000 claims description 4
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- -1 fatty acid compound Chemical class 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 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 3
- 238000005520 cutting process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 description 15
- 239000000203 mixture Substances 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 11
- 239000003921 oil Substances 0.000 description 7
- 239000012190 activator Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 5
- 238000004898 kneading Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000012763 reinforcing filler Substances 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 3
- 239000010692 aromatic oil Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 229920002857 polybutadiene Polymers 0.000 description 3
- 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 description 2
- 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 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- RLAWWYSOJDYHDC-BZSNNMDCSA-N lisinopril Chemical compound C([C@H](N[C@@H](CCCCN)C(=O)N1[C@@H](CCC1)C(O)=O)C(O)=O)CC1=CC=CC=C1 RLAWWYSOJDYHDC-BZSNNMDCSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 2
- 239000012744 reinforcing agent Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- UEZWYKZHXASYJN-UHFFFAOYSA-N cyclohexylthiophthalimide Chemical compound O=C1C2=CC=CC=C2C(=O)N1SC1CCCCC1 UEZWYKZHXASYJN-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 150000004989 p-phenylenediamines Chemical class 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 239000011787 zinc oxide 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
-
- 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
-
- 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
- C08K2201/006—Additives being defined by their surface area
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 provides a tire tread rubber with tear resistance and an all-steel radial tire, wherein the tire tread rubber is prepared from the following formula materials: 100 parts by mass of natural rubber; 0.2-0.3 parts by mass of a chemical peptizer; 40 to 60 parts by mass of rubber reinforcing carbon black; 5 to 20 parts by mass of white carbon black; 0-20 parts by mass of a petroleum plasticizer; 3-6 parts by mass of an active agent; 1.5-7 parts by mass of a defense component; 0.1-0.2 parts by mass of an anti-scorching agent; 1-2 parts by mass of a vulcanizing agent; 1 to 2 parts by mass of a vulcanization accelerator. The tread rubber formula adopts an all-natural rubber crude rubber system, is mainly matched with and added with a high-content petroleum plasticizer and is designed by combining other materials, so that the elongation of the rubber material and the like can be improved, the effects of cutting resistance and tearing resistance are enhanced, and the service life of the tire on a mixed road surface is prolonged.
Description
Technical Field
The invention relates to the technical field of rubber products, in particular to a tire tread rubber with tear resistance and an all-steel radial tire.
Background
The tyre casing is composed of tread, tyre shoulder, cord fabric and tyre bead. Wherein, the tread is the part of the tire contacting with the road surface, and the tread rubber is the outermost layer of rubber material of the tire. The cord fabric is formed by attaching a plurality of layers of rubberized cord fabrics, and the edges of each layer are wrapped on the tire bead steel wires in a bending mode. Among them, the type of tire in which the carcass cords are arranged in the radial direction (arranged at 90 ° or nearly 90 ° to the crown center line) and the carcass is bound with a belt layer having a cord arrangement nearly close to the circumferential direction is called a radial tire; the tire body is provided with a steel cord belted layer structure and is an all-steel radial tire.
At present, in order to improve the wear resistance of tread compounds, the formula design of all-steel radial tires usually adopts a mixed combination of natural rubber and butadiene rubber. The tread rubber formula adopts the design of matching natural rubber with butadiene rubber, but when the tire runs on a sharp gravel road surface, the condition that the block of the tire tread falls is easily generated, the abrasion resistance of the tire tread is influenced, and the service life of the tire is shortened.
Disclosure of Invention
In view of the above, the present disclosure provides a tire tread rubber with tear resistance and an all-steel radial tire, where the tread rubber provided by the present disclosure has a high elongation, and can improve the tear resistance of the tire and prolong the service life of the tire on a mixed road surface.
The invention provides a tire tread rubber with tear resistance, which is prepared from the following formula materials:
100 parts by mass of natural rubber;
0.2-0.3 parts by mass of a chemical peptizer;
40 to 60 parts by mass of rubber reinforcing carbon black;
5 to 20 parts by mass of white carbon black;
0-20 parts by mass of a petroleum plasticizer;
3-6 parts by mass of an active agent;
1.5-7 parts by mass of a defense component;
0.1-0.2 parts by mass of an anti-scorching agent;
1-2 parts by mass of a vulcanizing agent;
1 to 2 parts by mass of a vulcanization accelerator.
In a preferred embodiment of the invention, the natural rubber is smoked sheet rubber, and the content of the petroleum plasticizer is 4-19 parts.
In a preferred embodiment of the present invention, the content of the petroleum plasticizer is 5 to 15 parts, preferably 7 to 12 parts.
In a preferred embodiment of the present invention, the rubber-reinforcing carbon black has a CTAB adsorption specific surface area of 112m2/g～128m2(ii)/g; the white carbon black has a BET specific surface area of 100m2/g～200m2/g。
In a preferred embodiment of the present invention, the active agent comprises an inorganic metal oxide and an organic fatty acid compound.
In a preferred embodiment of the invention, the active agents include zinc oxide powder and stearic acid.
In a preferred embodiment of the present invention, the antioxidant component comprises 1.1 to 5 parts of a chemical antioxidant and 0.5 to 2 parts of a physical antioxidant.
In a preferred embodiment of the invention, the chemical antioxidant is selected from one or more of p-phenylenediamine antioxidants and ketoamine antioxidants; the physical anti-aging agent is microcrystalline wax.
In a preferred embodiment of the invention, the vulcanizing agent is oil-extended sulfur; the vulcanization accelerator is a sulfenamide accelerator.
The invention provides an all-steel radial tire which comprises the tire tread rubber.
Compared with the prior art, the tread rubber provided by the embodiment of the invention is mainly used on medium and short distance self-discharging vehicle type all-steel radial tires, and comprises the following raw materials in parts by mass: 100 parts of natural rubber; 40-60 parts of reinforcing carbon black; 5-20 parts of white carbon black; 0-20 parts of a petroleum plasticizer; 3-6 parts of an active agent; 1.5-7 parts of a defense component; 0.1-0.2 parts of a scorch retarder; 1-2 parts of a vulcanizing agent; 1-2 parts of a vulcanization accelerator. The tread rubber formula adopts an all-natural rubber crude rubber system, is mainly matched with and added with a high-content petroleum plasticizer and is designed by combining other materials, so that the elongation of the rubber material and the like can be improved, the effects of cutting resistance and tearing resistance are enhanced, and the service life of the tire on a mixed road surface is prolonged.
Detailed Description
The technical solutions in the embodiments of the present invention are 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 invention provides a tear-resistant tire tread rubber which is prepared from the following formula materials:
100 parts by mass of natural rubber;
0.2-0.3 parts by mass of a chemical peptizer;
40 to 60 parts by mass of rubber reinforcing carbon black;
5 to 20 parts by mass of white carbon black;
0-20 parts by mass of a petroleum plasticizer;
3-6 parts by mass of an active agent;
1.5-7 parts by mass of a defense component;
0.1-0.2 parts by mass of an anti-scorching agent;
1-2 parts by mass of a vulcanizing agent;
1 to 2 parts by mass of a vulcanization accelerator.
The tire tread rubber provided by the invention has the effects of higher elongation and the like, and the effects of enhancing the cutting resistance and the tear resistance, and can effectively solve the tear resistance problem of the tire.
As the butadiene rubber has poor performances in shearing resistance, cutting resistance and tearing resistance, the formula of the tire tread rubber provided by the invention mainly adopts a crude rubber system of natural rubber with a high proportion, namely the content of the natural rubber is designed to be 100 parts by mass. Natural rubber (NR, natural rubber for short) is a natural polymer compound containing polyisoprene as a main component, and is a general rubber which is most widely used; the natural rubber is not particularly limited, and the natural rubber can be prepared from common commercial products, and is preferably smoked sheet rubber No. 3. In the invention, the molecular chain of the natural rubber is in an amorphous state at normal temperature, has good molecular chain flexibility, especially has good elasticity, and has excellent performance on cutting resistance and tearing resistance.
In addition, the tread rubber formula provided by the embodiment of the invention adopts a reinforcing filler which comprises 40-60 parts by mass of rubber reinforcing carbon black; 5 to 20 parts by mass of white carbon black. Carbon black, also known as carbon black, is an amorphous carbon, either rubber reinforcing carbon black or furnace black. White carbon black (or white carbon black) mainly refers to precipitated silica, fumed silica and ultrafine silica gel, and is a porous substance. In a specific embodiment of the present invention, the rubber-reinforcing carbon black has a CTAB adsorption specific surface area of 112m2/g～128m2(ii)/g; the white carbon black has a BET specific surface area of 100m2/g～200m2/g。
In the invention, the formula material used for the tire tread rubber comprises 0-20 parts by mass of petroleum plasticizer, preferably 4-19 parts, more preferably 5-15 parts, and further preferably 7-12 parts. The formula materials also comprise: 0.2 to 0.3 parts by mass of a chemical peptizer. A large amount of petroleum plasticizer is added into the formula of the invention, so that the elongation and tear strength of the rubber material are improved, but the use amount of more than 20 parts is easy to influence the characteristics of rubber material hardness and the like. In particular embodiments of the invention, the petroleum-based plasticizer is a complex mixture consisting essentially of paraffins, naphthenes, aromatics and minor amounts of asphaltic materials, nitrogen-containing organic bases, and the like; preferably, the aromatic oil is a heavy oil fraction obtained by petroleum refining, which is extracted and refined with a specific solvent, and the solvent is removed and then the heavy oil fraction is distilled under reduced pressure. The aromatic oil has good compatibility with rubber, is not easy to spray out of the surface of a product, and has better processing performance than alkane oil and naphthenic oil. The petroleum processing oil in the specific embodiment of the invention is VIVATEC 500, which is green and environment-friendly aromatic oil (the source of the manufacturer is not limited), and can meet the dual requirements of high aromatic hydrocarbon and low toxicity.
Illustratively, the embodiment of the invention adopts a chemical peptizer HDBD, which comprises DBD + an active agent + a dispersing agent and is in a blue sheet or granular shape, and the chemical peptizer HDBD is mainly used for catalyzing the breaking of molecular chains in the plastication process and simultaneously preventing the broken molecular chains from being recoupled, thereby shortening the plastication time, reducing the energy consumption and reducing the cost. The chemical peptizer HDBD refers to a class of chemical peptizers which are sold in the market under the tradenames of HDBD, A-86, Leinafine 11 and the like, and the source of the manufacturers is not limited.
In the invention, the tread rubber formula comprises 3-6 parts by weight of an active agent. The activator, also referred to as activator, preferably comprises a first activator inorganic metal oxide and a second activator organic fatty acid based compound, more preferably comprises: 2-3 parts of zinc oxide (ZnO) and 1-3 parts of stearic acid. The components of zinc oxide (zinc oxide powder in the embodiment) and stearic acid can play roles in lubrication, convenient processing, vulcanization promotion and the like.
The rubber material for the tire tread comprises 1.5-7 parts by weight of a defense component, and the defense component preferably comprises 1.1-5 parts of a chemical anti-aging agent and 0.5-2 parts of a physical anti-aging agent. The chemical anti-aging agent is intended to consume ozone invading into the interior and exterior surfaces of the rubber surface and to terminate radicals generated by thermal and mechanical aging by a certain active compound, thereby preventing the aging of the rubber. Specifically, the chemical antioxidant is selected from one or more of p-phenylenediamine (such as antioxidant 6PPD which is N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine) and ketoamine antioxidant; the specific embodiment of the invention is a combination of chemical antioxidant 1 and chemical antioxidant 2.
And the physical anti-aging agent such as microcrystalline wax is added into the rubber composition in a proper amount to form a supersaturated state of the microcrystalline wax, so that the microcrystalline wax is continuously precipitated on the surface of the rubber to form a saturated hydrocarbon saturated film, thereby preventing the entry and oxidation of ozone and achieving the aim of anti-aging. Specifically, the microcrystalline wax is formed by distributing carbon elements between C19 and C59. The change of the usage amount of the anti-aging agent has little influence on the basic performance of the rubber material, and the change of the anti-aging agent is used for comparing the performance change trend of the rubber material after aging.
In the invention, the tread rubber formula material comprises: 1-2 parts of vulcanization accelerator and 1-2 parts of sulfur-adding agent. The sulfur adding agent is also called a vulcanizing agent, and oil-filled sulfur is specifically adopted in the embodiment of the invention. The vulcanization accelerator is abbreviated as accelerator, and is preferably a sulfenamide accelerator, for example, accelerator CBS (N-cyclohexyl-2-benzothiazole sulfenamide) is used. In addition, the embodiment of the invention also comprises 0.1-0.2 parts by mass of an anti-scorching agent material.
The tread rubber with the formula provided by the embodiment of the invention can be prepared according to the following steps:
firstly, raw rubber and reinforcing filler are added in proportion and mixed. In the first step of mixing, the mixture is preferably heated to 140-160 ℃; the kneading is preferably maintained for 1 to 4 minutes, and if the kneading time is less than 1 minute, the bonding property between the reinforcing filler and the raw rubber is poor, resulting in poor dispersion of the reinforcing filler, and if the kneading time is more than 4 minutes, rubber gelation or scorching is likely to occur, resulting in an influence on the rubber quality.
And secondly, adding the anti-aging agent, the activating agent and the like in proportion, and then mixing. In the second step of remixing, the mixture is preferably heated to 140-160 ℃; the kneading is preferably maintained for 1 to 3min, and the filler and the compounding agent may be further mixed and dispersed.
And step three, finally, adding the accelerator and the vulcanizing agent according to the proportion, and finally mixing. In the final mixing of the third step, the mixing temperature of the invention is preferably lower than 110 ℃, more preferably 80-105 ℃, and scorching is easily caused if the temperature is too high; the mixing time is preferably 1min to 3min, if the mixing time is less than 1min, the vulcanizing agent and the accelerator are not uniformly dispersed, and if the mixing time is more than 3min, the heat accumulation of the accelerator is easily caused, and the rubber compound is scorched.
In the examples of the present invention, the above rubber composition is preferably used for the preparation of a tire tread by stepwise kneading. Specifically, the embodiment of the invention provides an all-steel radial tire, which comprises the tire tread rubber. On the medium and short distance self-discharging vehicle type all-steel radial tire, the design of the all-natural rubber crude rubber system and the high-content plasticizer is adopted in the tread rubber formula, so that the tear resistance of the tire is improved, and the running life of the tire on a mixed road surface is prolonged.
For further understanding of the present application, the tire tread rubber with tear resistance and all-steel radial tire provided by the present application are specifically described below with reference to examples. It should be understood, however, that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the following examples.
The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by manufacturers, and are all conventional products available on the market.
Tear resistance: the semi-finished tensile test tear performance was performed.
Example 1
According to the formula shown in the table 1, firstly, raw rubber and reinforcing filler are added in proportion for mixing, and the mixture is heated to 140-160 ℃; mixing and maintaining for 1-4 min;
and in the second step, the anti-aging agent, the plasticizer, the activator and the like are added in proportion and are mixed again. In the second step of re-mixing, the mixture is heated to 140-160 ℃; mixing and maintaining for 1-3 min;
and finally, adding the accelerator and the vulcanizing agent in proportion, and finally mixing. When the third step is finally mixed, the mixing temperature is 80-105 ℃; the mixing time is 1-3 min, and the rubber composition is obtained.
Examples 2 to 6
According to the formulation of Table 1, a compound was prepared according to the procedure of example 1.
Comparative example
A compound was prepared according to the recipe of Table 1, following the procedure of example 1.
TABLE 1 formulation of rubber composition in examples of the present invention (in parts by weight)
Note:
the natural rubber is smoked sheet rubber No. 3;
the chemical peptizer is blue and flaky, and the melting point is 45-60 ℃; the chemical peptizer is named as A-86;
the rubber reinforcing carbon black is CTAB with an adsorption specific surface area of 112-128 m2/g；
The white carbon black has a BET specific surface area of 100 to 200m2/g；
The plasticizer is petroleum processing oil; the petroleum processing oil is VIVATEC 500 (manufacturer: Hansheng);
the chemical anti-aging agent 1 is a p-phenylenediamine derivative; antioxidant 6PPD, molecular formula C18H24N2N- (1, 3-dimethylbutyl) -N' -phenyl-p-phenylenediamine;
the chemical anti-aging agent 2 is of a ketoamine type; antioxidant RD, 1, 2-dihydro-2, 2, 4-trimethylquinoline homopolymer;
the microcrystalline wax is characterized in that carbon elements are distributed between C19-C59;
the anti-scorching agent is light beige crystal, and the initial melting point is between 80 and 100 ℃; antiscorching agent CTP, molecular formula C14H15O2NS, N-cyclohexylthiophthalimide;
the vulcanizing agent is oil-filled sulfur powder;
the accelerators referred to above are of the sulphenamide type.
TABLE 2 Performance Table
1. The hardness was measured manually at 23 ℃ on dumbbell-shaped test pieces made of the rubber compositions of comparative examples and examples using a Bareiss (digitest) JIS type A durometer.
2. Vulcanization conditions of composition test pieces: the test was conducted by heating at 160 ℃ for 20 minutes to cure the composition into various test pieces of different sizes.
3. EB and Tear properties were tested using a tensile tester.
As can be seen from table 2, the tread rubber mixture properties may be: hardness hs (jisa): 59 plus or minus 3; elongation EB (%): 600 plus or minus 50; tear strength (KN/m): 90 +/-10.
In examples 4, 5 and 6, 10 to 15 parts of the soot reinforcing agent added in the amount of the soot reinforcing agent should affect the hardness of the rubber compound, but the hardness of the rubber compound is not significantly changed due to the addition of a large amount of petroleum plasticizer. The change of the usage amount of the anti-aging agent has little influence on the basic performance of the rubber material, and the change of the anti-aging agent is used for comparing the performance change trend of the rubber material after aging. Examples 4, 5 and 6 adjusted the total part of the anti-aging system, which had no significant effect on tear resistance in order to improve the basic properties of the compound after aging.
In table 2, as the plasticizer was increased, the tensile stress (M300) and the breaking force were decreased, and the elongation and the tear strength were significantly increased; the tendency of the tear resistance to change is then slowed down, which indicates that plasticizers are not much more beneficial; when the plasticizer was added to 25 parts, the tear strength did not change significantly and the compound hardness further decreased.
According to the embodiments, the tread rubber formula adopts an all-natural rubber raw rubber system, is mainly matched and added with a high-content petroleum plasticizer, and is designed by combining other materials, so that the elongation of rubber materials and the like can be improved, the effects of cutting resistance and tear resistance are enhanced, and the service life of the tire on a mixed road surface is prolonged.
The above description is only a preferred embodiment of the present invention, and it should be noted that various modifications to these embodiments can be implemented by those skilled in the art without departing from the technical principle of the present invention, and these modifications should be construed as the scope of the present invention.
Claims (10)
1. A tire tread rubber with tear resistance is prepared from the following formula materials:
100 parts by mass of natural rubber;
0.2-0.3 parts by mass of a chemical peptizer;
40 to 60 parts by mass of rubber reinforcing carbon black;
5 to 20 parts by mass of white carbon black;
0-20 parts by mass of a petroleum plasticizer;
3-6 parts by mass of an active agent;
1.5-7 parts by mass of a defense component;
0.1-0.2 parts by mass of an anti-scorching agent;
1-2 parts by mass of a vulcanizing agent;
1 to 2 parts by mass of a vulcanization accelerator.
2. The tire tread rubber according to claim 1, wherein the natural rubber is a smoked sheet rubber, and the petroleum plasticizer is contained in an amount of 4 to 19 parts.
3. The tire tread rubber according to claim 2, wherein the petroleum plasticizer is contained in an amount of 5 to 15 parts, preferably 7 to 12 parts.
4. The tire tread rubber according to claim 1, wherein the rubber reinforcing carbon black has a CTAB adsorption specific surface area of 112m2/g～128m2(ii)/g; the white carbon black has a BET specific surface area of 100m2/g～200m2/g。
5. The tire tread stock of claim 1 wherein the active agent comprises an inorganic metal oxide and an organic fatty acid compound.
6. The tire tread stock of claim 5 wherein the active agents comprise zinc oxide powder and stearic acid.
7. The tire tread rubber of claim 1, wherein the antioxidant component comprises 1.1 to 5 parts of a chemical antioxidant and 0.5 to 2 parts of a physical antioxidant.
8. The tire tread rubber according to claim 7, wherein the chemical antioxidant is selected from one or more of p-phenylenediamine antioxidants and ketoamine antioxidants; the physical anti-aging agent is microcrystalline wax.
9. The tire tread rubber according to any one of claims 1 to 8, wherein the vulcanizing agent is oil-extended sulfur; the vulcanization accelerator is a sulfenamide accelerator.
10. An all-steel radial tire comprising the tire tread rubber of any one of claims 1 to 9.
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| CN202110396185.2A CN112940360A (en) | 2021-04-13 | 2021-04-13 | Tire tread rubber with tear resistance and all-steel radial tire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110396185.2A CN112940360A (en) | 2021-04-13 | 2021-04-13 | Tire tread rubber with tear resistance and all-steel radial tire |
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|---|---|---|---|---|
| CN1850894A (en) * | 2006-05-18 | 2006-10-25 | 刘树炯 | Laminated tread cushion rubber composition |
| CN1876700A (en) * | 2006-05-18 | 2006-12-13 | 刘树炯 | Tyre tread glue formula for whole-steel meridian tyre and its production method |
| CN101531777A (en) * | 2009-03-31 | 2009-09-16 | 浙江巍翔科技有限公司 | Rubber peptizer |
| US20100132867A1 (en) * | 2007-05-16 | 2010-06-03 | Naohiko Kikuchi | Rubber composition, bead apex, and tire |
| JP2010265427A (en) * | 2009-05-18 | 2010-11-25 | Toyo Tire & Rubber Co Ltd | Rubber composition and pneumatic tire |
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2021
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| CN1850894A (en) * | 2006-05-18 | 2006-10-25 | 刘树炯 | Laminated tread cushion rubber composition |
| CN1876700A (en) * | 2006-05-18 | 2006-12-13 | 刘树炯 | Tyre tread glue formula for whole-steel meridian tyre and its production method |
| US20100132867A1 (en) * | 2007-05-16 | 2010-06-03 | Naohiko Kikuchi | Rubber composition, bead apex, and tire |
| CN101531777A (en) * | 2009-03-31 | 2009-09-16 | 浙江巍翔科技有限公司 | Rubber peptizer |
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Application publication date: 20210611 |