CN106947122A - A kind of preparation method of rubber composition - Google Patents

Abstract

The invention relates to a method for preparing a rubber composition, which is characterized in that: natural rubber and carbon black are mixed to form carbon black masterbatch, solution-synthesized polyisoprene rubber is mixed with white carbon black to form white carbon black masterbatch , and then mix the two masterbatches with other rubber additives. The rubber composition prepared by the method of the invention has the advantages of good wear resistance, high elasticity and low heat generation, and can be used in tire formula and other rubber products.

Description

A kind of preparation method of rubber composition

This application is titled "a rubber composition with natural rubber/carbon black and synthetic polyisoprene rubber/silica as the masterbatch and its processing technology", the application number is "201410031929.0", and the application date is " Divisional application of the Chinese patent application dated January 23, 2014.

technical field

The invention relates to the field of rubber, in particular to the fields of rubber products and rubber processing.

Background technique

The energy loss of rubber during dynamic use is one of its basic characteristics, which is caused by the hysteresis loss of the rubber compound. When the hysteresis loss increases, the energy consumption and heat generation of the rubber compound increase during the dynamic deformation process, which causes the temperature of the rubber compound to rise, which in turn reduces the strength and wear resistance of the compound rubber, causing early damage to tires and other products; more importantly, Increase the rolling resistance of tires, increase fuel consumption (fuel consumption), and increase carbon dioxide emissions.

Numerous studies have shown that the use of reinforcing precipitated silica fillers in formulations can reduce the rolling resistance of tires. Patent CN1539872A proposes a rubber formula with balanced wet skid resistance and tire rolling resistance. The composition is composed of polyolefin, carbon black, white carbon black, and organosilane. Patent CN1141311A and patent CN1141313A disclose the tread formula of diene rubber adding silica and carbon black. The process is a traditional mixing process, adding fillers and additives to diene polymer for mixing. Patent CN1134434A discloses elastomer, silica, and carbon black compound. The patent limits the amount of carbon black to less than 30 parts by mass, and the combined ratio of silica and carbon black is in the range of 3/1---30/1 . Patent CN1140129A stipulates that the ratio of white carbon black/carbon black is at least 10:1, and the amount of carbon black is small, which is not conducive to wear resistance. These patents all adopt the traditional mixing process. Carbon black/silica and additives are added to the rubber together. Carbon black/silica must inevitably absorb non-rubber components such as additives, which reduces the combination of fillers and rubber. It also reduces wear resistance.

The present invention intends to design a rubber composition through a new mixing process, so that carbon black/silica is first combined with rubber and then mixed with other rubber additives, which can reduce the heat generation performance of the rubber under the premise of maintaining wear resistance. Improve the elasticity of rubber.

Contents of the invention

For prior art problems, the purpose of the present invention is to provide a kind of rubber composition and its processing technology that take natural rubber/carbon black, synthetic polyisoprene rubber/silica as masterbatch, and the innovation of this technology invention lies in Utilizing the advantages of solution-synthesized polyisoprene polymer with single component and less non-rubber components, when preparing synthetic polyisoprene silica masterbatch, the surface of silica will not adsorb non-rubber components, and then pass The role of the coupling agent enables the silica to be better combined with the rubber to achieve the purpose of improving wear resistance and reducing heat generation. The rubber composition prepared according to the technology of the invention can be used in tire treads to reduce tire heat generation and tire rolling resistance under the premise of maintaining wear resistance.

The present invention further relates to the following embodiments:

A kind of rubber composition containing natural rubber/carbon black and synthetic polyisoprene rubber/white carbon black masterbatch and preparation process, it is characterized in that:

Master batch process:

Carbon black masterbatch process: natural rubber and carbon black are mixed in an internal mixer to produce carbon black masterbatch;

White carbon black masterbatch process: Synthetic polyisoprene rubber, white carbon black, and coupling agent are mixed in an internal mixer to produce white carbon black masterbatch;

Final mixing process:

The carbon black masterbatch, white carbon black masterbatch, anti-aging agent, active agent, accelerator and vulcanizing agent are mixed according to the composition ratio to prepare a rubber composition.

According to the above-mentioned preparation method, based on 100 parts by mass of the total amount of rubber, the ratio of natural rubber to synthetic polyisoprene rubber is 1:3-5:1; the ratio of carbon black/white carbon black to natural rubber/synthetic The amount ratio of polyisoprene rubber is maintained at a certain ratio, and generally the ratio of the two fillers is kept consistent with the ratio of the two rubbers; the total amount of carbon black and silica is 5-120 parts by mass, preferably 10-100 parts by mass ;

According to the above preparation method, the carbon black masterbatch is based on 100 parts by mass of natural rubber, and the amount of carbon black is 5-100 parts, preferably 20-80 parts; the white carbon black masterbatch is based on 100 parts by mass of synthetic polyisoprene rubber , the amount of white carbon black is 5-100 parts, preferably 20-80 parts, and the amount of coupling agent is 0.5wt%-20wt% of white carbon black, preferably 1wt%-15wt%;

According to the above-mentioned preparation method, natural rubber includes standard rubber, Eucommia gum, smoked sheet rubber, guayule gum; wherein the synthetic polyisoprene rubber is cis-polyisoprene rubber, trans-polyisoprene rubber or their mixture.

According to the above-mentioned preparation method, wherein the carbon black is any carbon black, preferably the carbon black whose STSA specific surface area is 70-180m ² /g, and the compressed DBP absorption value is 60-150 (10 ⁻⁵ m ³ /kg); The above-mentioned white carbon black is any white carbon black, preferably precipitated white carbon black, with a specific surface area of 50-200m ² /g.

According to the above preparation method, wherein the coupling agent includes the most commonly used bis(triethoxypropylsilane) tetrasulfide and disulfide, 3-thiocyanatopropyl-triethoxysilane, γ- Mercapto-trimethoxysilane, zirconate coupling agent, phthalate coupling agent, nitro coupling agent, alcohol compounds, which include but not limited to propanol, butanol, ethylene glycol, Polyethylene glycol and its derivatives.

According to the above, wherein the activator is one or more of metal oxide and fatty acid combination and fatty acid metal soap salt, the metal oxide is one or more of zinc oxide, magnesium oxide, etc., and the fatty acid metal soap salt is hard One or more of zinc fatty acid, zinc borate, etc.

According to the above preparation method, the anti-aging agent includes one or more of amine anti-aging agent, quinoline anti-aging agent, benzimidazole anti-aging agent and protective wax.

According to the above rubber composition, wherein the accelerator includes but not limited to sulfenamide accelerator, thiazole accelerator, thiuram accelerator, guanidine accelerator or a combination thereof, the vulcanizing agent includes but not limited to sulfur, Insoluble sulfur, oil-extended sulfur, sulfur donors, or combinations thereof.

The present invention also relates to a rubber compound or vulcanizate prepared according to the above-mentioned preparation method.

The mixing process that the present invention further relates to comprises following three processing steps:

Process step one:

Carbon black masterbatch: natural rubber and carbon black are mixed in any internal mixer, the speed is 20-90rpm, the mixing time is 1-10min, and the debinding temperature is less than 165°C;

White carbon black masterbatch: Synthetic polyisoprene rubber, white carbon black and a certain amount of organic coupling agent are mixed in any internal mixer, the speed is 20-90rpm, the mixing time is 1-10min, and the rubber is discharged The temperature is controlled below 170°C, and the mixing temperature is kept at 130-165°C for 0.5-4min;

Process step two:

Mix carbon black masterbatch and white carbon black masterbatch in an internal mixer according to the composition ratio for 0.5min-3min, then add activator, anti-aging agent, etc., the mixing speed is 20-90rpm, and the mixing time is 1-10min ;

Process step three:

The masterbatch produced in step 2 is mixed with vulcanizing agent and accelerator in any internal mixer, the speed is 10-40rpm, and the mixing time is 1-8min.

The rubber composition in the present invention is based on 100 parts by mass of the total amount of rubber used, and the total amount of carbon black and silica is 5-120 parts by mass, preferably 10-100 parts by mass, wherein the carbon black is any carbon black, Carbon black with a STSA specific surface area of 70-180 m ² /g is preferred, and white carbon black with a specific surface area of 50-200 m ² /g precipitated white carbon black. The ratio of natural rubber to synthetic polyisoprene rubber is 1:3-5:1. The amount ratio of carbon black/silica is generally consistent with that of natural rubber/synthetic polyisoprene rubber, or it can be different.

The activator can be selected from zinc oxide, stearic acid, zinc stearate, magnesium oxide, zinc borate, etc., and the consumption is generally 1-10 parts by mass, preferably 2-5 parts by mass; the anti-aging agent is p-phenylenediamine Anti-aging agent, quinoline anti-aging agent, benzimidazole anti-aging agent or its composition, the total amount is no more than 8 parts by mass, preferably 1-6 parts by mass; the vulcanizing agent can be selected from ordinary sulfur powder, oil-extended sulfur, Insoluble sulfur, oil-extended insoluble sulfur, etc., the amount used is based on the effective content, the general amount is 0.2-10 parts by mass, and the preferred amount is 0.5-5 parts by mass; the accelerator is a thiuram accelerator, a sulfenamide accelerator Agents, zinc carbamate accelerators, guanidine accelerators or combinations thereof, generally in an amount of 0.2-8 parts by mass, preferably 0.2-5 parts by mass.

detailed description

The present invention is further described below with examples, but the scope of the present invention is not limited by these examples.

Table 1 Instruments and equipment for rubber sample preparation

serial number device name Specifications Manufacturer 1 Internal mixer XSM-1/10-120 Shanghai Kechuang Rubber & Plastic Machinery Equipment Co., Ltd. 2 Open mill 152.5*320 Guangdong Zhanjiang Machinery Factory 3 Flat vulcanizing machine XLB-D600*600 Zhejiang Huzhou Dongfang Machinery Co., Ltd.

Table 2 Test methods and instruments for physical properties of vulcanized rubber

The following chemicals were used in the examples and comparative examples:

20# standard rubber: Malaysia Changfa Rubber Factory;

Synthesis of cis-polyisoprene IR: Qingdao Yikesi New Material Co., Ltd.;

Synthesis of trans-polyisoprene TPI: Qingdao Dipai New Material Co., Ltd.;

Organosilane coupling agent X50S: containing 50% bis(3-ethoxypropylsilane) tetrasulfide, containing 50% N330 carbon black, Evonik Lanxing (Rizhao) Chemical Industry Co., Ltd.;

N115, N234: Cabot (China) Co., Ltd.;

Silica 833MP: Wuxi Hengcheng Silicon Industry Co., Ltd.;

Zinc Oxide: Dalian Zinc Oxide Factory;

Stearic acid: PF1808, Malaysia Licheng Co., Ltd.;

Antiaging agent 4020: N-(1.3-dimethylbutyl)-N’-phenyl-p-phenylenediamine, Jiangsu Sennics Chemical Technology Co., Ltd.;

Antiaging agent RD: 2,2,4-trimethyl-1,2-dihydroquinoline polymer, Tianjin Kemai Auxiliary Co., Ltd.;

Protective wax: Bemery Special Chemicals (Suzhou) Co., Ltd.;

Accelerator CZ: N-cyclohexyl-2-benzothiazole sulfenamide, Shandong Shangshun Chemical Co., Ltd.;

Sulfur: Qingdao Jinyuling Industrial Co., Ltd.;

The amounts of components in the following examples and comparative examples are parts by mass.

Comparative example 1

Formula: SMR20 50; synthetic polyisoprene rubber IR 50; N234 carbon black 25; white carbon black 833MP 25; silane coupling agent X50S 6; antioxidant RD 1.5; antioxidant 4020 2; zinc oxide 3; stearic acid 2; protective wax 1; sulfur 1; accelerator CZ1.5.

One-stage mixing process: Add 50 parts by mass of SMR20 and 50 parts by mass of IR to an internal mixer with a rotating speed of 90 rpm, mix for 60 seconds, lift the top bolt and add 25 parts by mass of carbon black N234, 25 parts by mass of white carbon black 833MP, 6 parts by mass of silane coupling agent X50S, 1.5 parts by mass of anti-aging agent RD, 3 parts by mass of zinc oxide, 2 parts by mass of stearic acid, parts by mass of anti-aging agent 4020, and protective wax 1. After mixing for 60 seconds, lift the top bolt and clean , and then knead for 90 seconds to remove the glue, pressurize the mixing time for 210 seconds, and the glue removal temperature is 158°C;

Final rubber mixing process: Add 165.5 parts by mass of masterbatch in the internal mixer with a rotation speed of 60rpm, lift the top bolt after plasticizing for 30 seconds, add 1 part by mass of sulfur and 1.5 parts by mass of accelerator CZ; Clean up after 60 seconds; remove glue after 30 seconds of mixing, pressurize and mix for 120 seconds, and remove glue at 103°C;

Example 1

Formula: SMR20 50; synthetic polyisoprene rubber IR 50; N234 carbon black 25; silica 25; silane coupling agent X50S 6; antioxidant RD 1.5; antioxidant 4020 2; protective wax 1; zinc oxide 3; Stearic acid 2; Sulfur 1; Accelerator CZ 1.5.

One stage mixing process:

Carbon black masterbatch process: add 50 parts by mass of SMR20 to the internal mixer with a rotating speed of 90rpm for 50 seconds, lift up the top bolt, add 17 parts by mass of carbon black N234, lift up the top bolt for cleaning after mixing for 90 seconds, add The remaining 8 parts by mass of carbon black N234 were mixed for 30 seconds, lifted to the top bolt for cleaning, and mixed for 30 seconds to remove the glue; the pressurized mixing time was 200 seconds, and the glue removal temperature was 157°C.

White carbon black masterbatch process: Add 50 parts by mass of synthetic isoprene IR to an internal mixer with a rotating speed of 90 rpm, lift the top bolt after mixing for 50 seconds, add 17 parts by mass of white carbon black and 4 parts by mass of silane coupling After mixing for 60 seconds, lift the top bolt and add the remaining 8 parts by mass of white carbon black and 2 parts by mass of silane coupling agent X50S; after mixing for 30 seconds, lift the top bolt to clean, and mix for 60 seconds to remove glue; The refining time is 200 seconds, and the debinding temperature is 154°C;

Two-stage mixing process:

Add 75 parts by mass of carbon black masterbatch and 81 parts by mass of white carbon black masterbatch into the internal mixer with a rotating speed of 90rpm, mix for 80 seconds and lift the top bolt, add 1.5 parts by mass of antioxidant RD, 2 parts by mass of antioxidant 4020 , 1 part by mass of protective wax, 3 parts by mass of zinc oxide, 2 parts by mass of stearic acid; kneading for 70 seconds for cleaning; kneading for 30 seconds for debinding; pressurized mixing time for 180 seconds, debinding temperature 153°C;

Final rubber mixing process:

Add 165.5 parts by mass of two-stage mixing masterbatch to the internal mixer with a rotating speed of 60 rpm, mix for 30 seconds and lift the top bolt to add 1 part by mass of sulfur and 1.5 parts by mass of accelerator CZ; mix for 60 seconds to clean; mix again 30 seconds debinding, pressurized kneading time 120 seconds, debinding temperature 105°C.

Table 3: Performance comparison of Example 1 and Comparative Example 1

Compared with Comparative Example 1, Example 1 has improved elasticity, reduced compression heat generation, and improved wear resistance, indicating that when the mixing process of the present invention is adopted, heat generation is reduced, elasticity is improved, and wear resistance is improved.

Comparative example 2

Formula: SMR20 100; N115 carbon black 20; silica 30; silane coupling agent X50S 7.2; antioxidant RD 1.5; antioxidant 4020 2; protective wax 1; zinc oxide 3; stearic acid 2; sulfur 1; accelerator CZ 1.5.

One stage mixing process:

Add 100 mass parts of 20# standard glue in the internal mixer whose rotating speed is 90rpm, add 20 mass parts of carbon black N115, 30 mass parts of white carbon black, 7.2 mass parts of X50S, 3 mass parts of zinc oxide, 2 mass parts after plasticizing for 60 seconds Parts by mass of stearic acid, 1.5 parts by mass of anti-aging agent RD, 2 parts by mass of anti-aging agent 4020, 1 part by mass of protective wax, kneading for 60 seconds to lift the top bolt to clean, kneading for 90 seconds to remove glue, and the pressurized kneading time is 210 seconds, the debinding temperature is 163°C.

Final rubber mixing process:

Add 166.7 parts by mass of masterbatch to the internal mixer with a rotating speed of 60rpm, lift the top bolt after mixing for 30 seconds, add 1 part by mass of sulfur and 1.5 parts by mass of accelerator CZ, mix for 60 seconds to clean, and then mix for 30 seconds Second debinding, pressurized kneading time is 120 seconds, debinding temperature is 98°C.

Example 2

Formula: 20# standard rubber 40; trans polyisoprene TPI 20; cis polyisoprene IR 40; N115 carbon black 20; white carbon black 30; silane coupling agent 7.2; anti-aging agent RD 1.5; anti-aging Agent 4020 2; protective wax 1; zinc oxide 3; stearic acid 2; sulfur 1; accelerator CZ 1.5.

One stage mixing process:

Carbon black masterbatch process: Add 40 parts by mass of 20# standard rubber to an internal mixer with a rotating speed of 90 rpm, add 13 parts by mass of carbon black N115 after masticating for 50 seconds, lift the top bolt to clean for 80 seconds, add 7 mass parts Part of carbon black N115, kneading for 30 seconds, lifting the top plug to clean, kneading for 40 seconds to remove glue, pressurized mixing time is 200 seconds, and the temperature of glue removal is 165°C.

White carbon black masterbatch process: Add 20 parts by mass of trans-polyisoprene and 40 parts by mass of cis-polyisoprene into an internal mixer with a rotating speed of 90 rpm. After mixing for 50 seconds, lift up the top bolt and add 20 parts by mass of white carbon black and 4.8 parts by mass of silane coupling agent X50S. After mixing for 80 seconds, lift up the top bolt for cleaning, and add 10 parts by mass of white carbon black and 2.4 parts by mass of silane X50S , kneading for 40 seconds, lifting the top bolt to clean, kneading for 40 seconds to remove glue; pressurized mixing time is 210 seconds, and the temperature of glue removal is 158°C.

Two-stage mixing process:

Add 60 parts by mass of carbon black masterbatch and 97.2 parts by mass of white carbon black masterbatch in the internal mixer with a rotating speed of 90rpm, lift the top bolt for 60 seconds and add 3 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.5 parts by mass of anti-aging agent RD, 2 parts by mass of anti-aging agent 4020, and 1 part by mass of protective wax, mixed for 80 seconds to clean, and discharged the second-stage masterbatch after mixing for 30 seconds. 154°C.

Final rubber mixing process:

Add 166.7 parts by mass of the second-stage masterbatch to the internal mixer with a rotating speed of 60r/min, lift the top bolt after mixing for 30 seconds, add 1 part by mass of sulfur, 1.5 parts by mass of accelerator CZ, and mix for 60 seconds to clean, and then Knead for 30 seconds to remove glue, pressurize and mix for 120 seconds, and remove glue at 98°C.

Table 4: Performance comparison of embodiment 2 and comparative example 2

Trans-isoprene TPI Mooney viscosity is high, difficult to process, use lower Mooney cis-isoprene IR and TPI and use in the embodiment 2, both have identical structural unit, compatibility is good, simultaneously Solved the shortcoming of TPI processing difficulty. The tensile strength and tear strength of Example 2 are higher than that of Comparative Example 2, the temperature rise of the bottom of Example 2 is lower than that of Comparative Example 2, and the wear performance is improved.

Comparative example 3

Formula: SMR20 100; N234 carbon black 30; silica 20; silane coupling agent X50S 5; antioxidant RD 1.5; antioxidant 4020 2; zinc oxide 3; stearic acid 2; sulfur 1; accelerator CZ 1.5.

One-stage mixing process: Add 100 parts by mass of SMR20 to an internal mixer with a rotating speed of 90 rpm, mix for 60 seconds, lift the top bolt and add 30 parts by mass of carbon black N234, 20 parts by mass of white carbon black, and 5 parts by mass of silane coupling Agent X50S, 1.5 parts by mass of anti-aging agent RD, 3 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 2 parts by mass of anti-aging agent 4020, 1 part by mass of protective wax, after mixing for 60 seconds, lift the top bolt, clean, and mix Refining for 90 seconds to remove the glue, the total mixing time is 210 seconds, and the glue removal temperature is 162°C;

Two-stage process: Add 164.5 parts by mass of the first-stage mixing masterbatch to the internal mixer with a rotating speed of 60 rpm, lift the top bolt after plasticizing for 30 seconds, and add 1 part by mass of sulfur and 1.5 parts by mass of accelerator CZ; after mixing for 60 seconds Cleaning; glue removal after 30 seconds of mixing, pressurized mixing time of 120 seconds, and glue removal temperature of 104°C;

Example 3

Formula: SMR20 60; synthetic polyisoprene rubber IR 40; N234 carbon black 30; silica 20; silane coupling agent X50S 5; antioxidant RD 1.5; antioxidant 4020 2; protective wax 1; zinc oxide 3; Stearic acid 2; Sulfur 1; Accelerator CZ 1.5.

One stage mixing process:

Carbon black masterbatch process: Add 60 parts by mass of 20# standard rubber to the internal mixer with a rotating speed of 90 rpm, add 20 parts by mass of carbon black N234 after masticating for 50 seconds, lift the top bolt to clean for 80 seconds, add 10 mass parts 1 part of carbon black N234, mixed for 30 seconds, lifted the top plug to clean, mixed for 40 seconds to remove glue, pressurized mixing time was 200 seconds, and the temperature of glue removal was 157°C.

White carbon black masterbatch process: Add 40 parts by mass of synthetic trans polyisoprene to the internal mixer with a rotating speed of 90rpm, lift the top bolt after mixing for 50 seconds, add 13 parts by mass of white carbon black 833MP and 3.5 parts by mass For the mixture of silane coupling agent X50S, after mixing for 80 seconds, lift up the top bolt for cleaning, add a mixture of 7 parts by mass of white carbon black 833MP and 1.5 parts by mass of silane X50S, mix for 40 seconds, lift up the top bolt for cleaning, and mix for 40 seconds Debinding: pressurized kneading time is 210 seconds, debinding temperature is 153°C.

Two-stage mixing process:

Add 90 parts by mass of carbon black masterbatch and 65 parts by mass of white carbon black masterbatch into an internal mixer with a rotating speed of 90r/min, mix for 60 seconds and lift the top bolt to add 3 parts by mass of zinc oxide and 2 parts by mass of stearin Acid, 1.5 parts by mass of anti-aging agent RD, 2 parts by mass of anti-aging agent 4020, 1 part by mass of protective wax, mixing for 80 seconds to clean up, discharging the second-stage masterbatch after mixing for 30 seconds, pressurized mixing for 170 seconds, and glue removal The temperature was 154°C.

Final rubber mixing process:

Add 164.5 parts by mass of the second-stage masterbatch to the internal mixer with a rotating speed of 50r/min, lift the top bolt after mixing for 30 seconds, add 1 part by mass of sulfur, 1.5 parts by mass of accelerator CZ, and mix for 60 seconds to clean. Mixing for 30 seconds to remove the final rubber mixing, pressurized mixing time is 120 seconds, and the glue removal temperature is 102°C.

Table 5: Performance comparison of embodiment 3 and comparative example 3

Compared with Comparative Example 3, Example 3 has improved elasticity, reduced compression heat generation, and improved wear resistance, indicating that when the mixing process of the present invention is adopted, heat generation is reduced, elasticity is improved, and wear resistance is improved.

Claims (10)

1. a preparation method of rubber composition, is characterized in that: natural rubber and carbon black mixing generate carbon black masterbatch, the polyisoprene rubber of solution synthesis and white carbon black mixing generate white carbon black masterbatch, Then the two kinds of masterbatches are mixed with other rubber additives. 2. preparation method according to claim 1 is characterized in that: described mixing process comprises the steps: 1) Masterbatch: natural rubber and carbon black are mixed in an internal mixer, the speed is 20-90rpm, the mixing time is 1-10min, and the discharge temperature is less than 165°C; synthetic polyisoprene rubber and white carbon black And a certain amount of organic coupling agent is mixed in the internal mixer, the speed is 20-90rpm, the mixing time is 1-10min, the debinding temperature is controlled below 170°C, and the mixing temperature is kept at 130-165°C at 0.5 -4min; 2) Mixing: Mix carbon black masterbatch and white carbon black masterbatch in an internal mixer according to the composition ratio for 0.5min-3min, then add additives other than vulcanizing agent and accelerator, and the mixing speed is 20-90rpm , the mixing time is 1-10min; 3) Final mixing: mixing the masterbatch produced in step 2) with vulcanizing agent and accelerator in an internal mixer at a speed of 10-40rpm and mixing time of 1-8min. 3. preparation method according to claim 1 is characterized in that: in 100 mass parts of rubber total consumption, the consumption ratio of natural rubber and synthetic polyisoprene rubber is 1:3-5:1; Carbon black/ The dosage ratio of silica is consistent with that of natural rubber/synthetic polyisoprene rubber; the total dosage of carbon black and silica is 5-120 parts by mass, preferably 10-100 parts by mass. 4. preparation method according to claim 1 is characterized in that: carbon black masterbatch is in 100 mass parts of natural rubbers, and carbon black consumption is 5-100 parts, preferably 20-80 parts; White carbon black masterbatch is with synthetic Based on 100 parts by mass of polyisoprene rubber, the dosage of white carbon black is 5-100 parts, preferably 20-80 parts, and the dosage of coupling agent is 0.5wt%-20wt% of the white carbon black, preferably 1wt%-15wt%. 5. preparation method according to claim 1 is characterized in that: natural rubber comprises standard glue, Eucommia gum, smoked sheet glue, guayule glue; Wherein synthetic polyisoprene rubber is cis polyisoprene rubber , trans polyisoprene rubber or their mixtures. 6. The preparation method according to claim 1, characterized in that: wherein the carbon black is any carbon black, preferably the STSA specific surface area is 70-180m ² /g, and the compressed DBP absorption value is 60-150 (10 ^-5 m ³ /kg) of carbon black; the white carbon black is any white carbon black, preferably precipitated white carbon black, with a specific surface area of 50-200m ² /g. 7. The preparation method according to claim 1, characterized in that: wherein said coupling agent comprises the most commonly used bis(triethoxypropylsilane) tetrasulfide and disulfide, 3-thiocyanatopropyl Base-triethoxysilane, γ-mercapto-trimethoxysilane, zirconate coupling agent, phthalate coupling agent, nitro coupling agent, alcohol compounds, the alcohol compounds include but not limited to Propanol, Butanol, Ethylene Glycol, Polyethylene Glycol and their derivatives. 8. according to claim 1, it is characterized in that: wherein activator is metal oxide and fatty acid combination and fatty acid metal soap salt one or more, and described metal oxide is zinc oxide, magnesium oxide etc. one or more The fatty acid metal soap salt is one or more of zinc stearate, zinc borate, etc.; the anti-aging agent includes one or more of amine anti-aging agent, quinoline anti-aging agent, benzimidazole anti-aging agent, and protective wax kind. 9. The preparation method according to claim 1, wherein the accelerator includes but is not limited to a sulfenamide accelerator, a thiazole accelerator, a thiuram accelerator, a guanidine accelerator or a combination thereof , vulcanizing agents include, but are not limited to, sulfur, insoluble sulfur, oil-extended sulfur, sulfur donors, or combinations thereof. 10. A mixed rubber or vulcanized rubber prepared by the preparation method according to claims 1-9.