A high-performance colored special rubber compound, its preparation method and application

Abstract

The present invention discloses a high-performance colored special rubber compound and its preparation method and application, belonging to the technical fields of colored rubber compounds and rubber crawler tracks. The formula raw materials of the high-performance colored special rubber compound of the present invention include: 100 parts of natural rubber, 50-75 parts of white carbon black, 0.05-1.0 part of carbon black, 2-6 parts of antioxidant composition, 1-3.5 parts of insoluble sulfur, 1-4 parts of accelerator, and 3-8 parts of coupling agent; wherein, the antioxidant composition is composed of antioxidant 2246, antioxidant MB, and antioxidant SP-C, and the mass ratio of the three is (1.5-2.5):(0.8-1.2):(0.7-1.1). The present invention optimizes and improves the formula of the colored rubber compound, cancels the use of styrene-butadiene rubber while increasing the dosage of natural rubber, constructs a hetero-synergistic protection system with better protection performance by using antioxidant 2246, antioxidant MB, and antioxidant SP-C, and appropriately adjusts the reinforcing system and vulcanization system. The colored rubber compound prepared by the present invention has greatly improved physical and mechanical properties, hot air aging properties, weather aging properties, and fatigue resistance, and can well meet the use requirements of colored construction machinery rubber crawler tracks.

Description

Technical Field

[0001] The present invention belongs to the technical field of colored rubber compounds and rubber crawlers, and particularly relates to a high-performance colored special rubber compound, a preparation method thereof and an application thereof. Background Art

[0002] A rubber crawler is a new type of chassis walking part used on machinery such as agriculture, construction, and engineering. It has a skeleton material embedded in the rubber and has the characteristics of low noise, small vibration, large traction force, no damage to the road surface, and small ground contact pressure compared with a steel crawler.

[0003] Different from ordinary construction machinery rubber crawlers with harsh operating environments, colored construction machinery rubber crawlers have advantages such as good passability in wet fields and no walking traces, and are more suitable for working environments with high environmental protection requirements such as the food industry, offshore oilfield operations, and indoor operations. The raw material of ordinary construction machinery rubber crawlers is black rubber compound, while colored construction machinery rubber crawlers use colored rubber compound as the raw material. Different from black rubber compound, colored rubber compound is gray or white itself, and the required color can be changed by adding color paste; based on the special working environment of colored construction machinery rubber crawlers, although the requirements for wear resistance and cut resistance of the raw material colored rubber compound are not so high, on the other hand, the colored rubber compound formula features the use of silica filling supplemented with a small amount of carbon black N330 as a colorant, and the reinforcement effect is not as good as that of ordinary carbon black. At the same time, in order to prevent pollution, conventional high-efficiency anti-aging agents such as RD and 4020 with relatively large pollution cannot be used, and only non-polluting anti-aging agents with poor protection effects can be used. Therefore, higher formula design requirements are put forward for the physical and mechanical properties, aging resistance and fatigue resistance of colored rubber compounds. Summary of the Invention

[0004] Under the foregoing background art, the purpose of the present invention is to provide a high-performance colored special rubber compound, a preparation method thereof and an application thereof. The present invention optimizes the rubber compound system by canceling the use of styrene-butadiene rubber and increasing the amount of natural rubber. In view of the performance defects of natural rubber and the formula specificity of colored rubber compounds, a hybrid synergistic effect protection system with better protection performance is adopted, and the reinforcement system and vulcanization system are appropriately adjusted; the colored rubber compound of the present invention can greatly improve the physical and mechanical properties, aging resistance and fatigue resistance of the prepared colored construction machinery rubber crawlers.

[0005] To solve the above technical problems, the present invention is specifically realized through the following technical solutions:

[0006] One of the purposes of the present invention is to provide a high-performance colored special rubber compound, which comprises the following formula raw materials in parts by weight:

[0007] 100 parts of natural rubber,

[0008] 50 - 75 parts of silica,

[0009] Carbon black 0.05-1.0 parts,

[0010] 2-6 parts of antioxidant composition,

[0011] Insoluble sulfur 1-3.5 parts,

[0012] 1-4 parts of accelerator,

[0013] 3-8 parts of coupling agent;

[0014] The antioxidant composition is composed of antioxidant 2246 (2,2'-methylenebis(4-methyl-6-tert-butylphenol)), antioxidant MB (2-mercaptobenzimidazole), and antioxidant SP-C (a mixture of styrenated phenol and calcium carbonate), and the mass ratio of the three is (1.5-2.5):(0.8-1.2):(0.7-1.1).

[0015] The present invention optimizes the formula design, eliminates the use of styrene-butadiene rubber and increases the amount of natural rubber in the original natural rubber-styrene-butadiene rubber system, thereby improving the physical and mechanical properties and flex crack resistance of the rubber; and increases the polysulfide bonds by appropriately increasing the amount of insoluble sulfur and accelerators, thereby improving the anti-fatigue performance of the rubber.

[0016] On the one hand, due to the different characteristics of each antioxidant and the different aging properties of different rubber formulations, the most effective antioxidant for a certain rubber may be ineffective or even harmful to another rubber; therefore, it is necessary to comprehensively consider the aging properties of different rubbers, anti-aging requirements and the characteristics of various antioxidants to make a reasonable selection. On the other hand, amine antioxidants with high protective effects have greater pollution, while phenolic antioxidants with no pollution or little pollution have poor protective effects. These contradictions need to be considered for the color rubber of the present invention.

[0017] Based on the characteristics of the color compound formula of the present invention, which cancels styrene-butadiene rubber and increases natural rubber, uses high-content silica filling, and can only use pollution-free anti-aging agents, the present invention constructs a hetero-synergistic effect system with better protective performance using anti-aging agent 2246, anti-aging agent MB, and anti-aging agent SP-C. At the same time, the mass ratio of anti-aging agent 2246, anti-aging agent MB, and anti-aging agent SP-C is optimized to be (1.5 - 2.5):(0.8 - 1.2):(0.7 - 1.1). In most cases, the combination of the same type of anti-aging agents can only produce an additive effect. However, the inventors found that when using chain-breaking hindered bisphenol anti-aging agent 2246 as the main component and supplemented with anti-aging agent SP-C, the combination of the two not only has an additive effect but also can avoid the oxidation of polymers caused by the phenoxy group of anti-aging agent 2246, thus generating a preliminary synergistic effect. On this basis, the present invention also selects a hydroperoxide-destroying anti-aging agent - anti-aging agent MB, which can further produce a hetero-synergistic effect with anti-aging agent 2246 and anti-aging agent SP-C: when anti-aging agent MB decomposes oxidatively, it generates hydroperoxides and further becomes non-free radicals. On the one hand, anti-aging agent MB significantly reduces the consumption rate of anti-aging agent 2246 and anti-aging agent SP-C, greatly extending their effective inhibition periods. On the other hand, anti-aging agent 2246 and anti-aging agent SP-C can also effectively shorten the oxidation kinetic chain length, terminate the generation of chain-propagating free radicals and only generate a small amount of hydroperoxides, thus being able to reduce the consumption rate of anti-aging agent MB in turn. The three interact with each other to establish a hetero-synergistic effect system with better protective performance and no pollution.

[0018] Preferably, the mass ratio of anti-aging agent 2246, anti-aging agent MB, and anti-aging agent SP-C is 2:1:1.

[0019] Preferably, the natural rubber is a crystalline rubber mainly composed of cis-1,4-polyisoprene. Natural rubber has a large self-reinforcing property and has very good mechanical strength and flex resistance. Because of the unsaturated double bonds, natural rubber is a substance with relatively strong chemical reaction ability, and its fatal weakness is its poor aging resistance. Therefore, through formula optimization, the present invention focuses on studying the hetero-synergistic effect protection system to endow natural rubber with excellent aging resistance. By combining chain-breaking hindered bisphenol anti-aging agent 2246, hydroperoxide-destroying anti-aging agent MB, and chain-breaking hindered phenol anti-aging agent SP-C, a hetero-synergistic effect system with better protective performance is constructed, significantly improving the protective efficiency of natural rubber.

[0020] Preferably, the high-performance color special compound includes the following formula raw materials by weight: 100 parts of natural rubber, 56 parts of silica, 0.2 parts of carbon black, 2 parts of anti-aging agent 2246, 1 part of anti-aging agent MB, 1 part of anti-aging agent SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of accelerator, and 6 parts of coupling agent.

[0021] Preferably, the coupling agent is SI-50GE.

[0022] The second object of the present invention is to provide a method for preparing the above-mentioned high-performance colored special rubber compound, and the steps are as follows:

[0023] Step 1: Take natural rubber and carbon black for raw rubber plasticization.

[0024] Step 2: Conduct the first-stage mixing of the plasticized triangular package obtained from the raw rubber plasticization with part of the silica and the antioxidant composition.

[0025] Step 3: Conduct the second-stage mixing of the first-stage mixed rubber obtained in Step 2 with the remaining silica and the coupling agent.

[0026] Step 4: Conduct the final re-mixing of the second-stage mixed rubber obtained in Step 3 with insoluble sulfur and accelerators to obtain a high-performance colored special rubber compound.

[0027] Preferably, the addition ratio of silica during the first-stage mixing in Step 2 is 60%-80%.

[0028] The colored rubber compound of the present invention is prepared by multi-stage rubber mixing. Only part of the silica is added during the first-stage mixing, the rubber mixing time is prolonged, and the rubber mixing discharge temperature is appropriately increased, which is beneficial to the dispersion of silica in the rubber compound; the remaining silica and the coupling agent are added during the second-stage mixing to avoid the early vulcanization reaction of silica and the coupling agent at too high a temperature during the first-stage mixing, effectively prolonging the scorch time of the rubber compound.

[0029] The third object of the present invention is to provide the application of the above-mentioned high-performance colored special rubber compound in the preparation of colored construction machinery rubber tracks.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The present invention optimizes and improves the formula of the colored rubber compound, cancels the use of styrene-butadiene rubber while increasing the amount of natural rubber, constructs a hetero-synergistic protection system with better protection performance by using antioxidant 2246, antioxidant MB, and antioxidant SP-C, and appropriately adjusts the reinforcing system and the vulcanization system. The physical and mechanical properties, hot air aging properties, weather aging properties, and fatigue resistance of the colored rubber compound prepared by the present invention are greatly improved, and it can well meet the use requirements of colored construction machinery rubber tracks. Detailed Embodiments

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Those not specified in the embodiments are carried out according to the conventional conditions or the conditions recommended by the manufacturer. Those reagents or instruments not specified by the manufacturer are all conventional products that can be obtained through commercial purchase.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the present invention. The terms used in the description of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] Raw materials used in the experiment: Natural rubber was purchased from Thailand; styrene-butadiene rubber (SBR 1502) was purchased from Sinopec; cis-1,4-polybutadiene rubber (BR9000) was purchased from Sinopec Sichuan; silica was purchased from Zhuzhou Xinglong; carbon black (carbon black N330) was purchased from Shanxi Sanqiang; antioxidant 2246 was purchased from Huangyan, Zhejiang; antioxidant MB was purchased from Huangyan, Zhejiang; antioxidant SP-C was purchased from Shanghai; antioxidant 264 was purchased from Changzhou Xince; antioxidant 2246-S was purchased from Changzhou Xince; zinc salt MBZ was purchased from Wuhan; insoluble sulfur was purchased from Shandong Yanggu Huatai; accelerator (NS) was purchased from Shandong Shangshun; coupling agent (SI-50GE) was purchased from Jiangsu Ruiba.

[0035] Instruments and equipment used in the experiment: X(S)N-110 / 30 type internal mixer, X(S)K-550 type open mill, 401A heat aging test box, M200E rubber Mooney viscometer, AI-7000S&TCS-2000 tensile testing machine, GT-7012-Q1 rubber dynamic cut resistance testing machine, GT-7011-DG flex fatigue testing machine, GT-7011-R type ROSS flexing testing machine, GT-7012-DDIN abrasion testing machine, AKRON abrasion testing machine, GT-7042-RDA digital elasticity testing machine.

[0036] Example 1

[0037] The formulation dosage of the colored special rubber compound in this example is as follows:

[0038] Weigh 100 parts of natural rubber, 56 parts of silica, 0.2 part of carbon black N330, 2 parts of antioxidant 2246, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0039] Example 2

[0040] The formulation dosage of the colored special rubber compound in this example is as follows:

[0041] Weigh 100 parts of natural rubber, 50 parts of silica, 0.2 part of carbon black N330, 1.5 parts of antioxidant 2246, 0.8 part of antioxidant MB, 1.1 part of antioxidant SP-C, 3.5 parts of insoluble sulfur, 4 parts of NS, and 3 parts of SI-50GE by weight.

[0042] Example 3

[0043] The dosage of the color special rubber compound in this embodiment is as follows:

[0044] Weigh 100 parts of natural rubber, 70 parts of silica, 0.2 part of carbon black N330, 2 parts of antioxidant 2246, 1.2 parts of antioxidant MB, 0.7 part of antioxidant SP-C, 2 parts of insoluble sulfur, 2 parts of NS, and 8 parts of SI-50GE by weight.

[0045] The abrasion resistance, heat resistance, aging resistance, and vulcanization speed of styrene-butadiene rubber are better than those of natural rubber, but its physical and mechanical properties, processing properties, and service performance of products are inferior to natural rubber. Styrene-butadiene rubber can be used in combination with natural rubber and various synthetic rubbers; the cold resistance, abrasion resistance, and elasticity of cis-butadiene rubber are particularly excellent after vulcanization, with less heat generation under dynamic load and good aging resistance, and it can also be used in combination with natural rubber and various synthetic rubbers. In the experiment of the present invention, by further adjusting the rubber compound system and the composition ratio of the pollution-free antioxidant composition, etc., a more in-depth study and comparison were carried out on the hetero-synergistic effect system constructed by antioxidant 2246, antioxidant MB, and antioxidant SP-C.

[0046] Comparative Example 1

[0047] The dosage of the color rubber compound in this comparative example is as follows:

[0048] Weigh 70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 56 parts of silica, 0.2 part of carbon black N330, 2 parts of antioxidant 2246, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0049] Comparative Example 2

[0050] The dosage of the color rubber compound in this comparative example is as follows:

[0051] Weigh 60 parts of natural rubber, 25 parts of styrene-butadiene rubber, 15 parts of cis-butadiene rubber, 56 parts of silica, 0.2 part of carbon black N330, 2 parts of antioxidant 2246, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0052] Comparative Example 3

[0053] The dosage of the color rubber compound in this comparative example is as follows:

[0054] Weigh 70 parts of natural rubber, 30 parts of styrene-butadiene rubber, 56 parts of silica, 0.2 part of carbon black N330, 2 parts of antioxidant 2246, 2 parts of antioxidant SP-C, 2 parts of insoluble sulfur, 2 parts of NS, and 6 parts of SI-50GE by weight.

[0055] Comparative Example 4

[0056] The dosage of the color compounding recipe in this comparative example is as follows:

[0057] Weigh 100 parts of natural rubber, 56 parts of silica, 0.2 parts of carbon black N330, 2 parts of antioxidant 2246, 1 part of antioxidant MB, 1 part of antioxidant 264, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0058] Comparative Example 5

[0059] The dosage of the color compounding recipe in this comparative example is as follows:

[0060] Weigh 100 parts of natural rubber, 56 parts of silica, 0.2 parts of carbon black N330, 2 parts of antioxidant 2246-S, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0061] Comparative Example 6

[0062] The dosage of the color compounding recipe in this comparative example is as follows:

[0063] Weigh 100 parts of natural rubber, 56 parts of silica, 0.2 parts of carbon black N330, 2 parts of antioxidant 2246, 1 part of zinc salt MBZ, 1 part of antioxidant SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0064] Comparative Example 7

[0065] The dosage of the color compounding recipe in this comparative example is as follows:

[0066] Weigh 100 parts of natural rubber, 56 parts of silica, 0.2 parts of carbon black N330, 2 parts of antioxidant 2246, 2 parts of antioxidant MB, 2 parts of antioxidant SP-C, 2.2 parts of insoluble sulfur, 2.3 parts of NS, and 6 parts of SI-50GE by weight.

[0067] Test Example

[0068] The raw materials of the recipes in the above Examples 1-3 and Comparative Examples 1-7 were made into compounds according to the following technological steps:

[0069] The compound preparation was carried out on an X(S)N-110 / 30 type internal mixer and an X(S)K-550 type open mill, and the rubber mixing was carried out in four stages:

[0070] The feeding order was: raw rubber plasticization (natural rubber + carbon black N330); first-stage mixing (plasticized triangular package + 70% of the silica + antioxidant); second-stage mixing (first-stage mixed rubber + the remaining 30% of the silica + coupling agent); re-mixing (second-stage mixed rubber + insoluble sulfur + accelerator).

[0071] The specific rubber mixing process is as follows:

[0072] The rotor speed of the X(S)N-110 / 30 internal mixer is 30 rpm, the pressure is 7 MPa, and the initial temperature of the mixing chamber is 60 °C; the speed ratio of the front and rear rollers of the X(S)K-550 open mill is 1:1.19, the linear speed of the front roller is 28.55 m / min, the temperature of the front roller is 60 °C, and the temperature of the rear roller is 55 °C.

[0073] 1. Raw rubber plasticization: Keep the feeding pressure weight for 190 s → Lift the pressure weight → Keep the pressure weight for 240 s → Discharge the rubber → Transfer to the open mill through the elevator for appropriate supplementary plasticization, adjust the roller gap to 8 mm, roll it evenly through wrapping the roller, cut with the left and right cutters, cut off, and knead 5 times, then roll it into a coil, and weigh it according to the batching standard. Adjust the roller gap to within 1 mm, thin pass and make a triangular package, and store it for 24 h.

[0074] 2. First-stage mixing: Keep the feeding pressure weight for 200 s → Lift the pressure weight and clean → Keep the pressure weight for 120 s → Lift the pressure weight → Keep the pressure weight for 120 s → Discharge the rubber and transfer to the open mill through the elevator, adjust the roller gap to 9 mm, roll it evenly through wrapping the roller, cut with the left and right cutters, cut off, and knead 2 times, then take out the sheet and store it for 24 h.

[0075] 3. Second-stage mixing: Keep the feeding pressure weight for 180 s → Lift the pressure weight and clean → Keep the pressure weight for 50 s → Lift the pressure weight → Discharge the rubber and transfer to the open mill through the elevator, adjust the roller gap to 9 mm, roll it evenly through wrapping the roller, cut with the left and right cutters, cut off, and knead 2 times, then take out the sheet and store it for 24 h.

[0076] 4. Remixing: Keep the feeding pressure weight for 90 s → Lift the pressure weight and keep it for 5 s → Keep the pressure weight for 60 s → Lift the pressure weight → Discharge the rubber and transfer to the open mill through the elevator, adjust the roller gap to 6 mm, roll it evenly through wrapping the roller, cut with the left and right cutters, cut off, and knead 2 times, then take out the sheet and store it for 24 h.

[0077] Test the relevant physical properties of the prepared rubber compound samples according to the following national standards respectively.

[0078] Tensile strength (Type I specimen) GB / T 528-2009

[0079] Tear strength (right-angle specimen) GB / T 529-2008

[0080] Akron abrasion GB / T 1689-2014

[0081] DIN abrasion GB / T 4696

[0082] Impact resilience GB / T 1681-2009

[0083] Flexing ASTM D 1052-09

[0084] Flexure Cracking Test GB / T 13934-2006

[0085] Hardness (Shore A) GB / T 531.1-2008

[0086] Hot Air Aging (100℃ * 72h) GB / T 3512-2014

[0087] Weather Aging (Static Tensile 20% * 6 months) GB / T 3511-2001

[0088] The test results of the small compounding test (vulcanization time 150℃ / min) are shown in Table 1 as follows.

[0089] Table 1

[0090]

[0091] Comparing the test result data in Table 1, it can be seen that the hybrid synergistic effect system constructed based on the antioxidant combination of the present invention significantly improves the physical and mechanical properties such as tensile strength and tear strength of the prepared rubber compound and its flexure cracking resistance.

[0092] The test results of the hot air aging test are shown in Table 2 as follows.

[0093] Table 2

[0094]

[0095] Comparing the test result data in Table 2, it can be seen that the hybrid synergistic effect system constructed based on the antioxidant combination of the present invention significantly optimizes the protection effect of the prepared rubber compound and greatly improves its hot air aging performance.

[0096] The protection effect of the protection system is not only related to the types and ratios of antioxidants used, but also inseparable from the protection efficiency and durability of the antioxidants themselves (volatilization, migration, rainwater extraction, etc.). Therefore, it is crucial to investigate the effect of the protection system on weather aging. On the basis of studying the thermal oxygen aging of rubber by the hybrid synergistic effect protection system, the present invention also focuses on investigating the protection performance of this protection system against weather aging under the condition of static tensile 20%. The test results of the static tensile 20% weather aging test are shown in Table 3 as follows.

[0097] Table 3

[0098]

[0099] Comparing the test result data in Table 3, it can be seen that the hybrid synergistic effect system constructed based on the antioxidant combination of the present invention also greatly improves the weather aging performance of the prepared rubber compound, which is consistent with the trend of hot air aging performance.

[0100] In summary, the present invention uses natural rubber to greatly improve the mechanical strength and flex resistance of the rubber compound. At the same time, an antioxidant 2246, antioxidant MB, and antioxidant SP-C are used to construct a hetero-synergistic effect system with better protective performance, effectively overcoming the fatal weakness of natural rubber's poor aging resistance. Finally, the physical and mechanical properties, hot air aging properties, weather aging properties, and fatigue resistance of the prepared rubber compound are greatly improved, meeting the usage requirements of colored construction machinery rubber tracks and having good market competitiveness.

[0101] The embodiments described above only represent several preferred embodiments of the present invention. The description is relatively specific and detailed, but it does not limit the present invention. It should be noted that for those skilled in the art, the present invention can also have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the concept and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-performance colored special rubber compound, characterized in that, The raw material consists of the following components by weight parts: 100 parts of natural rubber, 50 - 75 parts of silica, 0.05 - 1.0 part of carbon black, 2 - 6 parts of antioxidant composition, 1 - 3.5 parts of insoluble sulfur, 1 - 4 parts of accelerator, 3 - 8 parts of coupling agent; Among them, the antioxidant composition consists of antioxidant 2246, antioxidant MB, and antioxidant SP - C, and the mass ratio of the three is (1.5 - 2.5):(0.8 - 1.2):(0.7 - 1.1).

2. The high-performance colored special rubber compound according to claim 1, characterized in that, The mass ratio of antioxidant 2246, antioxidant MB, and antioxidant SP - C is 2:1:

1.

3. The high-performance colored special rubber compound according to claim 1, characterized in that, The raw material consists of the following components by weight parts: 100 parts of natural rubber, 56 parts of silica, 0.2 part of carbon black, 2 parts of antioxidant 2246, 1 part of antioxidant MB, 1 part of antioxidant SP - C, 2.2 parts of insoluble sulfur, 2.3 parts of accelerator, and 6 parts of coupling agent.

4. The high-performance colored special rubber compound according to claim 1, characterized in that, The coupling agent is SI - 50GE.

5. A method for preparing the high-performance colored special rubber compound according to any one of claims 1-4, characterized in that, The steps are as follows: Step 1: Take natural rubber and carbon black for raw rubber plasticization. Step 2: Conduct the first - stage mixing of the plasticized triangular package obtained from raw rubber plasticization with part of the silica and the antioxidant composition. Step 3: Conduct the second - stage mixing of the first - stage mixed rubber obtained in Step 2 with the remaining silica and the coupling agent. Step 4: Conduct the final re - mixing of the second - stage mixed rubber obtained in Step 3 with insoluble sulfur and accelerator to obtain a high - performance colored special rubber compound.

6. The method for preparing the high-performance colored special rubber compound according to claim 5, characterized in that, During the first - stage mixing in Step 2, the addition proportion of silica is 60% - 80%.

7. Application of the high-performance colored special rubber compound prepared by the high-performance colored special rubber compound according to claim 1 or the preparation method according to claim 5 in preparing a colored construction machinery rubber track.

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