CN110540685A - semi-hot-melt racing tire tread rubber and application thereof - Google Patents
semi-hot-melt racing tire tread rubber and application thereof Download PDFInfo
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- 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
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- 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
- C08L9/06—Copolymers with styrene
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
the invention relates to semi-hot-melt racing car tire tread rubber and application thereof, and belongs to the technical field of tire manufacturing. The tread rubber is prepared from the following raw materials in parts by weight: 10-50 parts of hot melt adhesive, 10-50 parts of natural rubber, 30-80 parts of solution polymerized styrene-butadiene rubber, 2-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-8 parts of polyethylene glycol, 1-5 parts of an anti-aging agent, 1-3 parts of protective wax, 1-10 parts of tackifying resin, 35-85 parts of carbon black, 1-6 parts of a silane coupling agent, 2-8 parts of sulfur and 3-15 parts of an accelerator; the hot melt adhesive is ethylene and copolymer hot melt adhesive thereof. The racing car tire prepared from the semi-hot-melt tread rubber can increase the surface heating speed of the tire tread faster, and a racing car can easily and quickly obtain higher grip on a track, so that the control performance of the racing car can be remarkably improved, and the semi-hot-melt tread rubber is suitable for preparing the racing car tire.
Description
Technical Field
The invention relates to the technical field of tire manufacturing, in particular to semi-hot-melt racing tire tread rubber and application thereof.
background
with the rapid development of national economy and automobile industry, China has become the first automobile consumer country in the world beyond the United states, and the successive entry of foreign automobile majors and the rise of national automobile industry in recent years provide a strong material foundation and technical support for the future development of automobile sports in China. Meanwhile, the entry of foreign top-level automobile race brands and the vigorous development of domestic automobile sports cultivate a large number of enthusiasts of automobile sports, and provide a solid mass foundation for the Chinese automobile sports.
In recent years, a great number of games such as rallies, short-track games, cross-country games and carting games in the Chinese automobile sports are developed, which bring people a sense of achievement with a challenge limit. The wonderful combination of the engine, the stark hoarseness, the accurate control of the walking on the out-of-control edge, the extremely controlled time and the combination of the man and the vehicle can make the man-made enthusiasm challenging, which is also the charm of the automobile movement. Compared with the foreign countries, the automobile motion in China is still in the primary stage, and the automobile motion is used as a high-end sports event, so that the automobile motion has a great propulsion effect on the development of the automobile industry in China and the overall development of the sports industry.
The importance of tire quality is self evident for racing. At present, manufacturers and clubs have increasingly demanded racing tires, and the grip performance and the yield resistance of the existing racing tires can hardly meet the requirements. Therefore, it is necessary to develop a tread rubber for racing tires having better grip performance, etc. to prepare a racing tire satisfying the requirements of manufacturers and clubs, etc.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a semi-hot-melt racing tire tread rubber, and the tire prepared by adopting the semi-hot-melt racing tire tread rubber can be quickly softened and become sticky, namely be heated and melted, only when the temperature of the tire tread reaches 70-80 ℃, so that the contact area between the tire tread and the ground is increased, the grip performance of the tire can be obviously improved, the control performance of racing vehicles is enhanced, and the semi-hot-melt racing tire tread rubber is suitable for preparing racing vehicle tires.
The invention relates to semi-hot-melt racing car tire tread rubber which is prepared from the following raw materials in parts by weight:
10-50 parts of hot melt adhesive, 10-50 parts of natural rubber, 30-80 parts of solution polymerized styrene-butadiene rubber, 2-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-8 parts of polyethylene glycol, 1-5 parts of an anti-aging agent, 1-3 parts of protective wax, 1-10 parts of tackifying resin, 35-85 parts of carbon black, 1-6 parts of a silane coupling agent, 2-8 parts of sulfur and 3-15 parts of an accelerator;
the hot melt adhesive is ethylene and copolymer hot melt adhesive thereof.
Compared with the prior art, the formula is obtained by adjusting the formula, innovatively adding the hot melt adhesive and determining the optimal dosage of the hot melt adhesive and other components after a large number of repeated tests. Through tests, the tread rubber formula of the semi-hot-melt racing tire can obviously improve the grip strength and the yield resistance of the tread rubber, has good plasticity in the rubber processing process, is good in compatibility with rubber, is beneficial to uniform dispersion of resin and filler in rubber, improves the extrusion process condition and the flowability of the rubber, and has smooth and flat extruded surface, good viscosity and difficulty in rubber burning. Therefore, from the perspective of semi-hot-melt racing tires, the tread rubber is the preferred rubber material for semi-hot-melt racing tires, and is beneficial to greatly improving the performance of the semi-hot-melt racing tires.
preferably, the raw materials comprise the following components in parts by weight: 20-40 parts of hot melt adhesive, 20-40 parts of natural rubber, 50-70 parts of solution-polymerized styrene-butadiene rubber, 4-8 parts of zinc oxide, 2-4 parts of stearic acid, 2-6 parts of polyethylene glycol-40002, 2-4 parts of anti-aging agent, 1-2 parts of protective wax, 2-8 parts of tackifying resin, 65-85 parts of carbon black, 2-5 parts of silane coupling agent, 3-7 parts of sulfur and 3-14 parts of accelerator. The test result of the mixture ratio is better, and the grip and the flexing resistance of the tread rubber are better and outstanding.
In the invention, preferably, the hot melt adhesive is a high styrene hot melt adhesive; in other embodiments, other types of ethylene and its copolymer hot melt adhesives (EVA, EEA, EAA, EVAL) can be used to achieve the same effect.
preferably, the carbon black consists of three carbon blacks in the following weight ratios:
15-35 parts of N339 carbon black, 10-35 parts of N220 carbon black and 10-50 parts of white carbon black.
The three carbon blacks are adopted, and the optimal dosage finally determined by repeated tests of the inventor is matched, so that the tread rubber has good comprehensive physical properties, the tearing property and the gripping property are improved, and the hardness, the tearing resistance, the tensile strength and the stress at definite elongation of the rubber are improved.
In the present invention, preferably, the carbon black consists of three carbon blacks in the following weight ratio:
20-30 parts of N339 carbon black, 15-30 parts of N220 carbon black and 20-40 parts of white carbon black.
by further optimizing the amount of carbon black, the overall physical properties of the tread rubber can be further improved.
Preferably, the accelerator consists of three accelerators in the following weight parts: 1-3 parts of accelerator CBS, 0.5-1.5 parts of accelerator DBG and 0.5-1.2 parts of accelerator MBTS.
in the present invention, it is further preferred that the accelerator consists of three accelerators in the following weight parts: the accelerator CBS2-3 parts, the accelerator DBG 1-1.5 parts and the accelerator MBTS0.5-1 part.
preferably, the anti-aging agent is at least one selected from N-phenyl-alpha-aniline, N-phenyl-N '-isopropyl-p-phenylenediamine, N-N' -diphenyl-p-phenylenediamine and anti-aging agent 4020.
the density of the semi-hot melt race tire tread rubber compound is about 1.217kg/dm 3.
the reagents and starting materials used in the present invention are commercially available. Wherein the solution polymerized styrene-butadiene rubber is selected from the solution polymerized styrene-butadiene rubber with the model number of SBR1739 of Shenhua chemical industry Limited company; the carbon black is selected from carbon black with the model numbers of N339 and N220 of Shanxi Yongdong chemical industry Co Ltd; the silane coupling agent is selected from HP-669 coupling agent of Jingdezhen Hongbai chemical science and technology limited; the sulfur is selected from granule sulfur with sulfur content of 95% or more, preferably high-dispersion insoluble sulfur. The hot melt adhesive is selected from SSBR4430 hot melt adhesives from TABLEWAKENK (south China) Inc.
The invention also discloses application of the semi-hot-melt racing tire tread rubber in preparing a racing tire. The racing tire prepared from the tread rubber has excellent gripping performance and yield resistance, and can meet the requirements of manufacturers, clubs and the like on high-level racing tire performance.
Detailed Description
the invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods in the following examples, which are not specified under specific conditions, were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
The semi-hot-melt racing tire tread rubber comprises the following components in parts by weight:
10 parts of hot melt adhesive (SSBR 4430 of Taiwan rubber department, Nantong), 15 parts of natural rubber, 80 parts of solution polymerized styrene-butadiene rubber (SBR1739, produced by Shenhua chemical industry Co., Ltd.), 2 parts of zinc oxide, 3 parts of stearic acid, 3 parts of polyethylene glycol-40002 parts, 2 parts of anti-aging agent (4020), 3 parts of protective wax, 3 parts of tackifying resin, 15 parts of N339 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 30 parts of N220 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 30 parts of white carbon black, 3 parts of silane coupling agent, 2.9 parts of high-dispersity insoluble sulfur (the sulfur content is more than or equal to 95%), 1.2 parts of accelerator CBS, 0.9 part of accelerator DBG and 1.2 parts of accelerator MBTS.
The semi-hot-melt racing tire tread rubber can be prepared by the following method:
(1) Mixing:
Firstly, raw materials are transported into a factory for inspection, and are dried and cut according to the requirements or directly fed according to the given formula amount and automatically weighed;
the weighed raw materials were then transferred to an internal mixer and automatically kneaded under a pressure of 35N/cm2, a temperature of 150 ℃ and a rotation speed of 35rmp for 160 seconds, followed by discharge of the rubber.
(2) Extruding and tabletting:
extruding with twin screw, tabletting, passing through isolating liquid (mainly comprising stearic acid soap and pulvis Talci), cooling, and stacking.
example 2
the semi-hot-melt racing tire tread rubber comprises the following components in parts by weight:
15 parts of a hot melt adhesive (SSBR 4430 of Taiwan rubber department, Nantong), 30 parts of natural rubber, 70 parts of solution-polymerized styrene-butadiene rubber (SBR1739, produced by Shenhua chemical industry Co., Ltd.), 3 parts of zinc oxide, 2 parts of stearic acid, 03 parts of polyethylene glycol-40003 parts of an antioxidant (N-phenyl-alpha-aniline), 2 parts of protective wax, 6 parts of tackifying resin, 20 parts of N339 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 10 parts of N220 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 50 parts of white carbon black, 5 parts of a silane coupling agent, 2 parts of high-dispersibility insoluble sulfur (the sulfur content is not less than 95%), 2 parts of a promoter CBS, 0.9 part of a promoter DBG and 1.2 parts of a promoter MBTS.
The semi-hot-melt racing tire tread rubber is prepared by the following method:
Prepared according to the method of example 1.
Example 3
The semi-hot-melt racing tire tread rubber comprises the following components in parts by weight:
20 parts of a hot melt adhesive (SSBR 4430 produced by Taiwan rubber department, Nantong), 35 parts of natural rubber, 65 parts of solution-polymerized styrene-butadiene rubber (SBR1739 produced by Shenhua chemical industry Co., Ltd.), 3.5 parts of zinc oxide, 2.5 parts of stearic acid, 40004.5 parts of polyethylene glycol, 2.5 parts of an anti-aging agent (N-phenyl-N' -isopropyl-p-phenylenediamine), 2 parts of protective wax, 6.5 parts of a tackifying resin, 25 parts of N339 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 25 parts of N220 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 40 parts of white carbon black, 4 parts of a silane coupling agent, 1.9 parts of high-dispersibility insoluble sulfur (the sulfur content is not less than 95%), 2.1 parts of an accelerator CBS, 0.9 parts of an accelerator DBG and 0.5 parts of an accelerator MBTS.
The semi-hot-melt racing tire tread rubber is prepared by the following method:
prepared according to the method of example 1.
Example 4
The semi-hot-melt racing tire tread rubber comprises the following components in parts by weight:
25 parts of hot melt adhesive (SSBR 4430 produced by Taiwan rubber department, Nantong), 35 parts of natural rubber, 60 parts of solution-polymerized styrene-butadiene rubber (SBR1739 produced by Shenhua chemical industry Co., Ltd.), 6 parts of zinc oxide, 3 parts of stearic acid, 40006.5 parts of polyethylene glycol, 3 parts of anti-aging agent (N-N' -diphenyl-p-phenylenediamine), 2 parts of protective wax, 7.5 parts of tackifying resin, 30 parts of N339 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 10 parts of N220 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 35 parts of white carbon black, 3.5 parts of silane coupling agent, 2.5 parts of high-dispersibility sulfur insoluble (the sulfur content is not less than 95%), 2.5 parts of accelerant CBS, 0.5 parts of accelerant DBG and 0.5 parts of accelerant MBTS.
The semi-hot-melt racing tire tread rubber is prepared by the following method:
Prepared according to the method of example 1.
example 5
The semi-hot-melt racing tire tread rubber comprises the following components in parts by weight:
35 parts of hot melt adhesive (SSBR 4430 of Taiwan rubber department, Nantong), 25 parts of natural rubber, 55 parts of solution polymerized styrene-butadiene rubber (SBR1739, produced by Shenhua chemical industry Co., Ltd.), 6.5 parts of zinc oxide, 3.5 parts of stearic acid, 40008 parts of polyethylene glycol, 3.5 parts of anti-aging agent (4020), 2.5 parts of protective wax, 8.5 parts of tackifying resin, 35 parts of N339 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 35 parts of N220 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 10 parts of white carbon black, 1 part of silane coupling agent, 3.5 parts of high-dispersibility sulfur insoluble (the sulfur content is not less than 95%), 1 part of accelerant CBS, 1.2 parts of accelerant DBG and 1 part of accelerant MBTS.
The semi-hot-melt racing tire tread rubber is prepared by the following method:
prepared according to the method of example 1.
Example 6
The semi-hot-melt racing tire tread rubber comprises the following components in parts by weight:
50 parts of a hot melt adhesive (SSBR 4430 produced by Taiwan rubber department, Nantong), 20 parts of natural rubber, 50 parts of solution polymerized styrene-butadiene rubber (SBR1739 produced by Shenhua chemical industry Co., Ltd.), 8 parts of zinc oxide, 4 parts of stearic acid, 4 parts of polyethylene glycol-40005 parts, 4 parts of an anti-aging agent (4020), 2 parts of protective wax, 9.5 parts of tackifying resin, 25 parts of N339 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 20 parts of N220 carbon black (produced by Shanxi Yongdong chemical industry Co., Ltd.), 30 parts of white carbon black, 3 parts of a silane coupling agent, 2 parts of high-dispersibility insoluble sulfur (the sulfur content is more than or equal to 95%), 2.8 parts of an accelerator CBS, 1.5 parts of an accelerator DBG and 1.2 parts of an accelerator MBTS.
The semi-hot-melt racing tire tread rubber is prepared by the following method:
Prepared according to the method of example 1.
Comparative example 1
the tread rubber for the racing car tire comprises the following components in parts by weight:
30 parts of hot melt adhesive, 40 parts of natural rubber, 30 parts of solution-polymerized styrene-butadiene rubber, 2 parts of zinc oxide, 2 parts of stearic acid, 1 parts of a life-prolonging agent, 2 parts of an anti-aging agent, 2 parts of protective wax, 1 part of tackifying resin, 2 parts of hardening resin, 30 parts of N339 carbon black, 45 parts of N220 carbon black, 10 parts of white carbon black, 1 part of a silane coupling agent, 2 parts of high-dispersity insoluble sulfur (the sulfur content is more than or equal to 95%), 1 part of an accelerator CBS, 1.5 parts of an accelerator DBG and 3.2 parts of an accelerator MBTS.
the tread rubber for the racing car tire is prepared by the following method:
prepared according to the method of example 1.
Comparative example 2
The tread rubber for the racing car tire comprises the following components in parts by weight:
45 parts of natural rubber, 35 parts of hot melt adhesive, 30 parts of styrene butadiene rubber, 20 parts of ethylene propylene diene monomer, 8 parts of zinc carbonate, 15 parts of superfine calcium carbonate, 2.5 parts of stearic acid, 10 parts of mica powder, 15 parts of white carbon black, 50 parts of high wear-resistant furnace black, 12 parts of high-grade pottery clay, 4 parts of zinc oxide, 2.5 parts of stearic acid, 2.8 parts of a life-prolonging agent A, 2.5 parts of Dadar oil, 5 parts of an accelerant, 2.5 parts of a paraffin mixture, 3.5 parts of RA white powder, 3 parts of insoluble sulfur, 15 parts of carbon black, 3 parts of aluminum hydroxide, 2 parts of magnesium oxide and 2 parts of a silane coupling agent.
The tread rubber for the racing car tire is prepared by the following method:
Prepared according to the method of example 1.
Comparative example 3
The tread rubber for the racing car tire comprises the following components in parts by weight:
45 parts of natural rubber, 60 parts of butadiene rubber, 30 parts of styrene-butadiene rubber, 25 parts of ethylene propylene diene monomer, 25 parts of polybutadiene rubber, 8 parts of zinc carbonate, 12 parts of superfine calcium carbonate, 3 parts of stearic acid, 5 parts of talcum powder, 35 parts of white carbon black, 50 parts of low-structure high-wear-resistance furnace black, 35 parts of high-grade pottery clay, 8 parts of 6700 resin, 8 parts of zinc oxide, 3 parts of stearic acid, 3 parts of magnesium oxide, 3.5 parts of RE brown crystal, 2 parts of Dada oil, 1 part of accelerator, 3.5 parts of paraffin mixture, 3.5 parts of RA white powder, 5.3 parts of insoluble sulfur, 25 parts of carbon black, 2 parts of aluminum hydroxide, 3.5 parts of alkylphenol disulfide and 3.5 parts of silane coupling agent.
the tread rubber for the racing car tire is prepared by the following method:
Prepared according to the method of example 1.
comparative example 4
The tread rubber for the racing car tire comprises the following components in parts by weight:
40 parts of natural rubber, 40 parts of butadiene rubber, 20 parts of reclaimed rubber, 58 parts of carbon black, 10 parts of high aromatic oil, 4 parts of 203 resin, 2.5 parts of stearic acid, 3.5 parts of zinc oxide, 40203.5 parts of anti-aging agent, 1.5 parts of anti-aging agent RD, 22412 parts of antioxidant, 21221.5 parts of microcrystalline wax, 1 part of special sulfur, 0.4 part of accelerator DPG, 0.3 part of accelerator NS and 0.15 part of accelerator CBS.
the tread rubber for the racing car tire is prepared by the following method:
Prepared according to the method of example 1.
comparative example 5
the tread rubber for the racing car tire comprises the following components in parts by weight:
40 parts of TS20 natural rubber; 60.0 parts of BR9000 butadiene rubber, 5 parts of ultrafine particle rubber powder, 45 parts of N330 carbon black, 3.5 parts of zinc oxide, 4 parts of an anti-aging agent, 4 parts of aromatic oil, 2 parts of a dispersant B, 3 parts of cashew nut oil modified phenolic resin, 4.5 parts of common sulfur, 3.5 parts of an accelerator and 3.2 parts of a life-prolonging agent A.
The tread rubber for the racing car tire is prepared by the following method:
Prepared according to the method of example 1.
Test results
The tread rubber prepared in the above examples and comparative examples was subjected to a performance test.
The test requirements are as follows: high speed experiments were performed on the finished tires: the tire tread temperature, temperature rise index, grip and tire appearance at the end of the test were measured and the results are shown in the following table:
TABLE 1 indoor high-speed performance test results of finished tires prepared from tread rubber of the examples
TABLE 2 indoor high-speed performance test results of finished tire prepared from tread rubber of comparative example
From the test results in the above table, it can be seen that under the same conditions of the maximum travel speed (250km/h), travel time (143min) and mileage (1823 km):
When the total parts (both 80 parts) of the carbon black used in the examples 2 and 3 are the same, the temperature rise index (respectively 13.4 and 14.3) and the grip strength (respectively 0.493 and 0.512) of the semi-hot-melt tread rubber obtained from the semi-hot-melt tread rubber are better, but the change is small, which indicates that when the carbon black is used in the same amount, the comprehensive physical property and the grip strength property of the obtained semi-hot-melt tread rubber are better, but the change of the property is smaller;
When the total parts of the carbon black used in examples 5 and 6 (respectively 80 parts and 70 parts) are different, the temperature rise index (19.8) and the grip strength (0.678) of the finished wheel prepared from the semi-hot-melt tread rubber obtained in example 6 are obviously better than the temperature rise index (17.1) and the grip strength (0.586) of the finished wheel prepared from the semi-hot-melt tread rubber obtained in example 5, which indicates that when the amount of the carbon black is reduced, the comprehensive physical properties of the finished wheel prepared from the semi-hot-melt tread rubber are better, and the grip strength performance is obviously improved.
The temperature rise indexes of finished wheels prepared by the semi-hot-melt tread rubber obtained in the embodiments 1, 2, 3, 4, 5 and 6, particularly the temperature rise indexes of finished wheels prepared by the semi-hot-melt tread rubber obtained in the embodiments 4, 5 and 6 are respectively 11.8, 13.4, 14.3, 15.1, 17.1 and 19.8 which are obviously higher than those of finished wheels prepared by the tread rubber obtained in a comparative example, and the tread temperature can reach 70-80 ℃, so that the finished wheels can be rapidly softened and become sticky, and the contact area between the tread and the ground is increased, thereby improving the grip; meanwhile, the grip strength is greatly higher than that of a finished wheel prepared by the tread rubber obtained by the comparative example, and is respectively 0.470, 0.493, 0.512, 0.546, 0.586 and 0.678. Therefore, the racing car tire prepared by using the semi-hot-melt tread rubber has higher temperature rise index, so that the surface temperature rise speed of the tire tread is higher, the racing car can easily and quickly obtain higher grip on a track, and the control performance of the racing car can be obviously improved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The semi-hot-melt racing tire tread rubber is characterized by comprising the following raw materials in parts by weight:
10-50 parts of hot melt adhesive, 10-50 parts of natural rubber, 30-80 parts of solution polymerized styrene-butadiene rubber, 2-10 parts of zinc oxide, 1-5 parts of stearic acid, 1-8 parts of polyethylene glycol, 1-5 parts of an anti-aging agent, 1-3 parts of protective wax, 1-10 parts of tackifying resin, 35-85 parts of carbon black, 1-6 parts of a silane coupling agent, 2-8 parts of sulfur and 3-15 parts of an accelerator;
The hot melt adhesive is ethylene and copolymer hot melt adhesive thereof.
2. the semi-hot-melt racing tire tread rubber as claimed in claim 1, wherein the raw materials comprise the following components in parts by weight:
20-40 parts of hot melt adhesive, 20-40 parts of natural rubber, 50-70 parts of solution-polymerized styrene-butadiene rubber, 4-8 parts of zinc oxide, 2-4 parts of stearic acid, 2-6 parts of polyethylene glycol-40002, 2-4 parts of anti-aging agent, 1-2 parts of protective wax, 2-8 parts of tackifying resin, 65-85 parts of carbon black, 2-5 parts of silane coupling agent, 3-7 parts of sulfur and 3-14 parts of accelerator.
3. The semi-hot melt racing tire tread rubber of claim 1 or 2, wherein the carbon black consists of three carbon blacks in the following weight ratio:
15-35 parts of N339 carbon black, 10-35 parts of N220 carbon black and 10-50 parts of white carbon black.
4. The semi-hot melt racing tire tread rubber of claim 1 or 2, wherein the carbon black consists of three carbon blacks in the following weight ratio:
20-30 parts of N339 carbon black, 15-30 parts of N220 carbon black and 20-40 parts of white carbon black.
5. The semi-hot melt racing tire tread rubber as claimed in claim 1 or 2, wherein the accelerator comprises three accelerators in the following weight ratio: 1-3 parts of accelerator CBS, 0.5-1.5 parts of accelerator DBG and 0.5-1.2 parts of accelerator MBTS.
6. The semi-hot melt racing tire tread rubber as claimed in claim 1 or 2, wherein the accelerator comprises three accelerators in the following weight ratio: 2-3 parts of accelerator CBS, 1-1.5 parts of accelerator DBG and 0.5-1 part of accelerator MBTS.
7. The semi-hot melt racing tire tread rubber of claim 1 or 2, wherein the anti-aging agent is at least one selected from the group consisting of N-phenyl- α -aniline, N-phenyl-N '-isopropyl-p-phenylenediamine, N-N' -diphenyl-p-phenylenediamine and anti-aging agent 4020.
8. Use of a semi-hot melt racing tire tread compound of any one of claims 1 to 7 in the preparation of a racing tire.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112592519A (en) * | 2020-12-15 | 2021-04-02 | 中国化工集团曙光橡胶工业研究设计院有限公司 | Aviation radial tire tread rubber and preparation method thereof |
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| CN112778593A (en) * | 2021-01-06 | 2021-05-11 | 正新橡胶（中国）有限公司 | Semi-hot-melt tread rubber composition and asphalt Racing tire |
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|---|---|
| CN110540685B (en) | 2022-01-21 |
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