Rubber kneading method, rubber kneading device, and rubber

Abstract

The invention discloses a rubber mixing method, a rubber mixing device and rubber. The rubber mixing method comprises the following steps: mixing an organic solvent, a filler and an auxiliary agent to form a premix; conveying the premix and the rubber composition into first internal mixing equipment for internal mixing to form a first mixture; discharging the first mixed substance from the first internal mixing equipment to form a first gaseous organic solvent and first mixed rubber; conveying the first mixed rubber into second internal mixing equipment for internal mixing to form a second gaseous organic solvent and second mixed rubber. The foaming phenomenon of mixed rubber can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of rubber processing, and more specifically, to a rubber mixing method, a rubber mixing device and rubber. Background Art

[0002] In the prior art, rubber mixing involves mixing a rubber composition, fillers, and additives to form a rubber compound. To ensure optimal mixing, fillers and additives are typically dispersed in an organic solvent before being mixed with the rubber composition to form the rubber compound. However, the resulting rubber compound often contains a small amount of residual organic solvent, which can cause foaming.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the Invention

[0004] An object of the present application is to provide a rubber mixing method, a rubber mixing device and a new technical solution for rubber.

[0005] According to a first aspect of the present application, there is provided a rubber mixing method, comprising:

[0006] mixing the organic solvent, filler and additive to form a premix;

[0007] The premix and the rubber composition are conveyed to a first internal mixing device for internal mixing to form a first mixed product;

[0008] Discharging the first mixed product from the first internal mixing device to form a first gaseous organic solvent and a first mixed rubber;

[0009] The first mixed rubber is transported to a second mixing device for mixing to form a second gaseous organic solvent and a second mixed rubber.

[0010] Optionally, the organic solvent includes at least one of cyclohexane, n-hexane, petroleum ether, carbon tetrachloride, ethyl acetate, gasoline and n-heptane;

[0011] The filler comprises at least one of carbon black and white carbon black;

[0012] The mass ratio of the organic solvent to the filler is 1:(0.8-1.5).

[0013] Optionally, the filling coefficient of the material consisting of the premix and the rubber composition in the first internal mixing equipment is 0.5 to 0.8.

[0014] Optionally, the mixing temperature of the first mixing equipment is greater than the boiling point of the organic solvent and less than or equal to 180° C.;

[0015] The mixing time of the first mixing equipment is 1 to 60 minutes.

[0016] Optionally, the banburying temperature of the second banburying device is greater than the boiling point of the organic solvent and is less than or equal to 180° C.; wherein the banburying temperature of the second banburying device is greater than the banburying temperature of the first banburying device;

[0017] The mixing time of the second mixing equipment is 1 to 60 minutes.

[0018] Optionally, discharging the first mixed material from the first internal mixing device to form a first gaseous organic solvent and a first mixed rubber includes:

[0019] The first gaseous organic solvent is transported to a first solvent recovery device to form an organic solvent.

[0020] Optionally, conveying the first gaseous organic solvent to a first solvent recovery device to form an organic solvent includes:

[0021] transporting the first gaseous organic solvent to a cold trap of the first solvent recovery device to form an organic solvent and a first sub-gaseous organic solvent;

[0022] The first sub-gaseous organic solvent is transported to the adsorption component of the first solvent recovery device to form an organic solvent.

[0023] Optionally, the step of conveying the first mixed rubber to a second mixing device for mixing to form a second gaseous organic solvent and a second mixed rubber comprises:

[0024] The second internal mixing equipment is pumped to a negative pressure state using a negative pressure device.

[0025] According to a second aspect of the present invention, a rubber mixing device is provided, wherein the rubber mixing device prepares rubber using the rubber mixing method according to any one of the first aspects.

[0026] According to a third aspect of the present invention, there is provided a rubber, wherein the rubber is prepared by the rubber mixing method according to any one of the first aspects.

[0027] The rubber mixing method of the present application first mixes an organic solvent, a filler and an additive to form a premix to improve the subsequent removal effect of the organic solvent from the mixed rubber; then, a first mixing device is used to mix the premix and the rubber composition to form a first mixed product, so that the first mixed product can remove part of the organic solvent after being discharged from the first mixing device; finally, the first mixed rubber after removing part of the organic solvent is mixed in a second mixing device to form a second mixed rubber, thereby effectively avoiding the foaming of the mixed rubber.

[0028] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0030] Figure 1 1 is a flow chart of a rubber mixing method according to one embodiment of the present invention.

[0031] Figure 2 Schematic diagram of the structure of the secondary aggregate in one embodiment of the present invention.

[0032] Figure 3 Schematic diagram of the secondary structure in one embodiment of the present invention.

[0033] Figure 4 Schematic diagram of a secondary structure containing an organic solvent and a coupling agent in one embodiment of the present invention.

[0034] Figure 5 Schematic diagram of the structure of the secondary structure of the organic solvent stripped by the coupling agent in one embodiment of the present invention.

[0035] Figure 6 Schematic diagram of the structure of rubber in one embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 1. Secondary aggregates;

[0038] 2. Filler;

[0039] 3. Secondary structure;

[0040] 4. Organic solvents;

[0041] 5. Coupling agent;

[0042] 6. The molecular chain of the second mixed rubber. DETAILED DESCRIPTION

[0043] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0044] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0045] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0046] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0047] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0048] In the following description, "connection" includes both a direct connection between the two and an indirect connection between the two via, for example, an adapter board, a middleware, etc.

[0049] In the following description, "organic solvent", "filler", "additive", "premix", "rubber composition", "material", "first mixed material", "first gaseous organic solvent", "first sub-gaseous organic solvent", "first mixed rubber" and "second mixed rubber" are only used to illustrate the working principle of the rubber mixing method and should not be regarded as part of the rubber mixing method.

[0050] like Figure 1 As shown, the rubber mixing method in this application includes the following steps S101 to S104:

[0051] S101, mixing an organic solvent 4, a filler 2, and an additive to form a premix;

[0052] It should be noted that, in order to facilitate the removal of the organic solvent 4 from the mixed rubber (the mixed rubber includes the first mixed rubber and the second mixed rubber prepared subsequently) in the subsequent process, the present application first mixes the organic solvent 4, the filler 2 and the additive to form the premix before using the first internal mixing equipment to prepare the first mixture.

[0053] The premix can be mixed in the first internal mixing device, so that the first internal mixing device can directly mix the premix and the rubber composition, thereby improving the preparation efficiency of the mixed rubber.

[0054] In other embodiments, the premix may not be mixed in the first mixing device. For example, the premix may be mixed using a kneader or a planetary mixer. In this case, the premix formed by mixing using the kneader or the planetary mixer can, on the one hand, further improve the removal effect of the organic solvent 4 from the mixed rubber; on the other hand, the premix can be tested to determine whether the mixing quality of the premix meets the mixing requirements of the first mixing device, thereby further improving the preparation quality of the mixed rubber.

[0055] In addition, the premix can not only improve the removal effect of the organic solvent 4 from the mixed rubber, but also disperse the agglomerated filler 2 so that the filler 2 can be uniformly dispersed in the mixed rubber later.

[0056] For example Figure 2 As shown, since the filler 2 will agglomerate to form multiple secondary aggregates 1 under dry conditions, and too many secondary aggregates 1 will cause the filler 2 to be unable to disperse between the molecular chains of the rubber composition during the mixing process, the present application first mixes the organic solvent 4, the filler 2 and the additive to form the premix before mixing the rubber composition using the first mixing equipment, so as to Figure 3 As shown, by mixing the organic solvent 4 with the filler 2, the organic solvent 4 can disperse the secondary aggregates 1 of the filler 2 into multiple secondary structures 3, and then the premix containing the multiple secondary structures 3 is added to the first mixing equipment and mixed with the rubber composition, which effectively improves the bonding effect between the filler 2 and the molecular chain of the rubber composition, thereby further improving the preparation quality of the mixed rubber.

[0057] Among them, the present application can also disperse the additive by mixing the organic solvent 4, the filler 2 and the additive to form the premix, that is, by mixing the organic solvent 4 with the additive, the additive can be dispersed, thereby making it easier for the additive to be dispersed in the rubber composition, further improving the quality of the mixed rubber prepared by the rubber mixing method described in the present application.

[0058] Furthermore, when the mass ratio of the organic solvent 4 to the filler 2 is less than 1:(0.8~1.5), the premix formed by mixing the organic solvent 4, the filler 2 and the additive cannot effectively disperse the agglomerated filler 2, nor can it effectively reduce the viscosity of the rubber composition during the subsequent mixing process, and also cannot effectively improve the lubrication effect of the first mixing equipment on the material composed of the premix and the rubber composition during the mixing process; and when the mass ratio of the organic solvent 4 to the filler 2 is greater than 1:(0.8~1.5), it will lead to poor removal effect of the subsequent removal of the organic solvent 4 from the mixed rubber.

[0059] Therefore, in order to further improve the performance of the premix, the mass ratio of the organic solvent 4 to the filler 2 is preferably 1:(0.8-1.5).

[0060] In addition, when the boiling point of the organic solvent 4 is less than or equal to 100° C., the removal effect of the organic solvent 4 from the mixed rubber can be improved in the subsequent mixing process.

[0061] To further improve the removal efficiency of the organic solvent 4 from the rubber mix, the boiling point of the organic solvent 4 is preferably less than or equal to 90° C. Of course, to further improve the removal efficiency of the organic solvent 4 from the rubber mix, the boiling point of the organic solvent 4 may also be less than or equal to 75° C.

[0062] In one embodiment, the organic solvent 4 includes at least one of cyclohexane, n-hexane, petroleum ether, carbon tetrachloride, ethyl acetate, gasoline and n-heptane.

[0063] Specifically, since cyclohexane, n-hexane, petroleum ether, carbon tetrachloride, ethyl acetate, gasoline and n-heptane can be mixed with the filler 2 and the additive at room temperature to form the premix, the present application effectively reduces the difficulty and manufacturing cost of preparing the premix and improves the preparation efficiency of the premix by setting the organic solvent 4 to include at least one of cyclohexane, n-hexane, petroleum ether, carbon tetrachloride, ethyl acetate, gasoline and n-heptane.

[0064] In other embodiments, the organic solvent 4 can also be any one of cyclohexane, n-hexane, petroleum ether, carbon tetrachloride, ethyl acetate, gasoline or n-heptane, so as to further improve the recovery effect of the organic solvent 4 by setting the organic solvent 4 of a single material.

[0065] In one embodiment, the filler 2 includes at least one of white carbon black, carbon black, calcium carbonate, diatomaceous earth, aluminum oxide, magnesium oxide, and clay.

[0066] Specifically, the present application effectively improves the preparation quality of the compounded rubber by arranging the filler 2 to include at least one of white carbon black, carbon black, calcium carbonate, diatomaceous earth, aluminum oxide, magnesium oxide and clay.

[0067] Among them, since carbon black or white carbon black can be better dispersed in the premix and better bonded with the molecular chain of the rubber, the present application further improves the production quality of the mixed rubber by setting the filler 2 to include at least one of carbon black and white carbon black.

[0068] In one embodiment, the auxiliary agent contains a certain amount of oil, such as aromatic oil, naphthenic oil or paraffin oil.

[0069] Specifically, the present application can better form a powder block solid premix by mixing the oil-containing additive with the organic solvent 4 and the filler 2, thereby further improving the preparation efficiency of the compounded rubber.

[0070] Of course, in other embodiments, the auxiliary agent may also not contain oil. Those skilled in the art may make a selection based on actual needs, and this application does not impose any specific limitation here.

[0071] In one embodiment, the auxiliary agent includes a coupling agent 5.

[0072] Specifically, since the coupling agent 5 can accelerate the dispersion of the filler 2 and the molecular chain bonding of the filler 2 with the rubber composition, the present application effectively improves the preparation efficiency of the mixed rubber by setting the auxiliary agent to include the coupling agent 5.

[0073] Of course, in other embodiments, the auxiliary agent may also include at least one of zinc oxide, antioxidant 4020, antioxidant RD, stearic acid, aromatic oil, cyclohexane oil, paraffin oil, anti-scorch agent CTP, sulfur, accelerator D and accelerator NS. Those skilled in the art can make a selection according to actual needs, and this application does not make any specific restrictions here.

[0074] In one embodiment, the premix is ​​a powdery solid.

[0075] Specifically, the present application sets the premixture as a powder block solid. On the one hand, it can improve the dispersion effect of the agglomerated filler 2 when preparing the premixture; on the other hand, it can also reduce the viscosity of the rubber composition during the mixing of the first mixing equipment; on the other hand, it can also improve the lubrication effect of the first mixing equipment during the mixing process of the material composed of the premixture and the rubber composition, thereby avoiding the material from adhering to the first mixing equipment and affecting the mixing efficiency of the first mixing equipment.

[0076] Of course, in other embodiments, the premix may also be in the form of bars, blocks or flakes. Those skilled in the art may make the selection according to actual needs, and this application does not impose any specific limitation thereto.

[0077] S102, conveying the premix and the rubber composition to a first internal mixing device for internal mixing to form a first mixture;

[0078] It should be noted that the present application uses the first internal mixing equipment to prepare the first mixed material, which can prepare a mixed rubber with a large filler 2 filling amount at low energy consumption and production efficiency. For example, a first internal mixing equipment with a torque value less than or equal to 200kN·m can be used to process a mixed rubber with a mass ratio of the rubber composition to the filler 2 of 1: (0.6 to 2). In this way, not only the energy consumption of the first internal mixing equipment is reduced, but also the manufacturing cost of the mixed rubber is lower. Of course, the present application can also use the first internal mixing equipment to prepare a mixed rubber with a small filler 2 filling amount, such as a mixed rubber with a mass ratio of the rubber composition to the filler 2 of 1: (0.1 to 0.6).

[0079] Among them, since the mixed rubber with a large filling amount of filler 2, especially the mixed rubber with a high filling amount in which the mass ratio of the rubber composition to the filler 2 is 1: (1~2), cannot be prepared by the dry mixing method in the prior art, therefore, the present application can better adapt to the preparation of mixed rubber with a large filling amount of filler 2 through the first mixing equipment.

[0080] In addition, the present application can reduce the viscosity of the rubber composition during the mixing process by conveying the premix and the rubber composition to the first mixing equipment for mixing, thereby avoiding the phenomenon that the rubber composition with too high viscosity cannot be mixed with the premix, thereby resulting in poor quality of the first mixed product.

[0081] When the mass ratio of the additive to the rubber composition in the premix is ​​less than or equal to 1:0.25, the premix formed by mixing the organic solvent 4, the filler 2, and the additive can effectively reduce the viscosity of the rubber composition. To further reduce the viscosity of the rubber composition, the mass ratio of the additive to the rubber composition can be less than or equal to 1:0.2. Furthermore, to further reduce the viscosity of the rubber composition, the mass ratio of the additive to the rubber composition can be less than or equal to 1:0.16.

[0082] Of course, in other embodiments, in order to reduce the viscosity of the rubber composition, it is preferred that the premix is ​​a powdery solid.

[0083] Furthermore, the present application can improve the lubrication effect of the first mixing equipment and the material composed of the premix and the rubber composition during the mixing process by conveying the premix and the rubber composition to the first mixing equipment for mixing, thereby avoiding the material from adhering to the first mixing equipment and affecting the mixing efficiency of the first mixing equipment.

[0084] Among them, when the mass ratio of the auxiliary agent in the premix to the rubber composition is less than or equal to 1:0.25, the premix formed by mixing the organic solvent 4, the filler 2 and the auxiliary agent can effectively improve the lubrication effect of the first mixing equipment with the material composed of the premix and the rubber composition during the mixing process. In order to further improve the lubrication effect of the first mixing equipment with the material composed of the premix and the rubber composition during the mixing process, the mass ratio of the auxiliary agent to the rubber composition can be less than or equal to 1:0.2. Furthermore, in order to make the lubrication effect of the first mixing equipment with the material composed of the premix and the rubber composition higher during the mixing process, the mass ratio of the auxiliary agent to the rubber composition can be less than or equal to 1:0.16.

[0085] Of course, in other embodiments, in order to improve the lubrication effect of the first mixing equipment on the material composed of the premix and the rubber composition during the mixing process, it is preferred that the premix is ​​a powder block solid.

[0086] In addition, compared with the dry mixing method in the prior art, the present application can reduce the mixing energy consumption of the rubber composition through the premix by conveying the premix and the rubber composition to the first mixing equipment for mixing, and greatly reduces the shear force exerted on the rubber composition by the first mixing equipment, thereby effectively avoiding the chain breakage of the molecular chain of the rubber composition due to excessive shear force, and at the same time avoiding the additional temperature rise caused by excessive shear force, further improving the performance of the first mixing equipment.

[0087] In one embodiment, the filling factor of the material composed of the premix and the rubber composition is 0.5 to 0.8.

[0088] Specifically, since a lower material filling coefficient will affect the mixing efficiency of the first mixing equipment, and a higher material filling coefficient will increase the failure rate of the first mixing equipment, in order to ensure the performance of the first mixing equipment, the filling coefficient of the material composed of the premix and the rubber composition is preferably 0.5 to 0.8.

[0089] It should be noted that the filling coefficient of the material in this application refers to the ratio of the volume of the material to the volume of the first internal mixing equipment.

[0090] In one embodiment, the mixing temperature of the first mixing equipment is greater than the boiling point of the organic solvent 4 and less than or equal to 180°C.

[0091] Specifically, the present application sets the mixing temperature of the first mixing equipment to be greater than the boiling point of the organic solvent 4, so that when the first mixing equipment is used to prepare the first mixture, the removal effect of the organic solvent 4 from the first mixed rubber can be further improved.

[0092] Among them, since the mixing temperature of the first mixing equipment is greater than the boiling point of the organic solvent 4, in order to prevent the organic solvent 4 from evaporating into the external environment and then polluting the external environment, the first mixing equipment is preferably a sealable bucket mixer.

[0093] The bucket mixer can be provided with an upper push bolt and a lower fixed bolt. When the first mixing device is used to prepare the first mixture, the upper push bolt is pressed downward and the lower fixed bolt is pressed upward, so that the first mixing device can prepare the first mixture under closed conditions, thereby effectively preventing the organic solvent 4 from evaporating into the external environment, thereby improving the environmental performance of the rubber mixing method.

[0094] The bucket mixer may also be provided with an elliptical rotor or an intermeshing rotor, so that when the first mixing device is used to prepare the first mixture, the elliptical rotor or the intermeshing rotor can fully knead, compress and shear the premix and the rubber composition, thereby achieving uniform dispersion of the filler 2 and the additive in the rubber composition.

[0095] In other embodiments, to further improve the mixing effect of the bucket mixer, the rotation speed of the elliptical rotor or the meshing rotor is preferably 5 to 200 rpm. Of course, to achieve even better mixing effect of the bucket mixer, the rotation speed of the elliptical rotor or the meshing rotor can also be set to 60 to 100 rpm.

[0096] In other embodiments, in order to improve the sealing effect of the bucket mixer, the rotor shaft of the elliptical rotor or the meshing rotor is preferably a mechanically sealed rotor shaft.

[0097] Furthermore, when the first mixing apparatus is sealed to prepare the first mixture, the organic solvent 4 gradually exerts pressure on the filler 2 and the additive after the temperature rises to the boiling point, thereby effectively promoting the dispersion of the filler 2 and the additive in the rubber composition. However, if the mixing temperature of the first mixing apparatus is too high, the rubber composition may suffer from scorching, vulcanization, and thermal decomposition.

[0098] Therefore, in order to promote the dispersion of the filler 2 and the additive in the rubber composition and prevent the rubber composition from scorching, vulcanization and thermal decomposition, the mixing temperature of the first mixing equipment is preferably less than or equal to 180°C.

[0099] In order to fully promote the dispersion of the filler 2 and the additive in the rubber composition and effectively prevent the rubber composition from scorching, vulcanization and thermal decomposition, the mixing temperature of the first mixing equipment is preferably less than or equal to 160°C.

[0100] Of course, in other embodiments, in order to further promote the dispersion of the filler 2 and the additive in the rubber composition and further prevent the rubber composition from scorching, vulcanization and thermal decomposition, the mixing temperature of the first mixing equipment can also be made less than or equal to 130°C.

[0101] In one embodiment, the mixing time of the first mixing equipment is 1 to 60 minutes.

[0102] Specifically, when the boiling point of the organic solvent 4 in the premix is ​​low and the banburying temperature of the first banburying device is low, the banburying time of the first banburying device can be relatively long. However, an excessively long banburying time cannot significantly improve the dispersion of the filler 2 and the additive in the rubber composition, and an excessively long banburying time can also cause the molecular chains of the rubber composition to break, resulting in poor quality of the subsequently prepared mixed rubber. Therefore, the banburying time of the first banburying device is preferably less than or equal to 60 minutes.

[0103] When the boiling point of the organic solvent 4 in the premix is ​​high and the mixing temperature of the first mixer is high, the mixing time of the first mixer can be relatively short. However, too short a mixing time will result in insufficient mixing of the premix and the rubber composition. Therefore, the mixing time of the first mixer is preferably greater than or equal to 1 minute.

[0104] In addition, during the mixing in the first mixing equipment, the organic solvent 4 in the premix can enhance the swelling effect of the rubber composition, so that the molecular chains of the rubber composition can be accelerated to expand, thereby achieving uniform dispersion of the filler 2 and the additive between the molecular chains of the rubber composition.

[0105] In addition, during the kneading period of the first kneading equipment, the premix and the rubber composition are continuously kneaded at a temperature exceeding the boiling point of the organic solvent 4, which also causes the organic solvent 4 in the premix to produce a pressurization effect, thereby acting on the filler 2 and the additive in the premix, thereby making the filler 2 and the additive more evenly dispersed between the molecular chains of the rubber composition.

[0106] In one embodiment, the rubber composition includes at least one of natural rubber, isoprene rubber, styrene-butadiene rubber (such as solution-polymerized styrene-butadiene rubber or emulsion-polymerized styrene-butadiene rubber), butadiene rubber, nitrile rubber, polyester rubber and bio-based rubber (such as bio-based eucommia rubber, bio-based itaconate rubber, bio-based butadiene rubber or bio-based isoprene rubber).

[0107] Specifically, the present application can select a suitable rubber composition according to the quantity and application of the mixed rubber to be prepared. Those skilled in the art can make the selection according to actual needs, and the present application does not make any specific restrictions here.

[0108] In one embodiment, the rubber composition may be in a shape of at least one of a strip, a block, and a powder.

[0109] Specifically, the present application can further improve the dispersion effect of the filler 2 and the additive between the molecular chains of the rubber composition by setting the shape of the rubber composition to be strips, blocks and powders.

[0110] S103, discharging the first mixed material from the first internal mixing device to form a first gaseous organic solvent and a first mixed rubber;

[0111] It should be noted that, in this step, the present application can separate the organic solvent 4 from the first mixed rubber by evaporating the organic solvent 4 in the first mixed material, that is, remove the organic solvent 4 from the first mixed rubber.

[0112] Specifically, after the first mixture is discharged from the first internal mixing equipment, since the first internal mixing equipment is under relatively high-pressure closed conditions and the external environment is under relatively low-pressure conditions, the organic solvent 4 in the first mixture will evaporate to form the first gaseous organic solvent. Furthermore, after the organic solvent 4 evaporates from the first mixture, the first mixture can be cooled and form the first mixed rubber.

[0113] Therefore, since part of the organic solvent 4 in the first mixed rubber has been removed, the foaming phenomenon of the first mixed rubber can be reduced to a certain extent. Therefore, when the quality requirements for rubber products are not high, the first mixed rubber can be directly used to prepare the required rubber products.

[0114] In one embodiment, discharging the first mixed material from the first internal mixing device to form a first gaseous organic solvent and a first mixed rubber comprises:

[0115] The first gaseous organic solvent is transported to a first solvent recovery device to form an organic solvent 4.

[0116] Specifically, to prevent the first gaseous organic solvent from escaping into the external environment and polluting the external environment, the present application further provides a first solvent recovery device. The first solvent recovery device can collect the evaporated first gaseous organic solvent and convert it into the organic solvent 4, allowing the organic solvent 4 to be recycled. This not only improves the environmental performance of the rubber mixing method, but also further reduces the production cost of the mixed rubber.

[0117] In addition, since the dosage of the first gaseous organic solvent is large and the first gaseous organic solvent has a high temperature, in order to improve the recovery efficiency of the first solvent recovery equipment, the first solvent recovery equipment also includes a cold trap, which can reduce the temperature of the first gaseous organic solvent and cause part of the first gaseous organic solvent to condense to form the organic solvent 4.

[0118] In addition, since the first gaseous organic solvent will produce some first sub-gaseous organic solvents after being cooled by the cold trap, in order to avoid some of the first sub-gaseous organic solvents from escaping into the external environment and polluting the external environment, and in order to enable the first solvent recovery equipment to have a more efficient recovery effect, the first solvent recovery equipment also includes an adsorption component, which can absorb the first sub-gaseous organic solvent and convert it into the organic solvent 4.

[0119] Since the adsorption assembly cannot adsorb the first sub-gaseous organic solvent during desorption, to further improve the adsorption efficiency of the adsorption assembly, the adsorption assembly is provided in at least two groups. Specifically, the adsorption assembly can include a first adsorption assembly and a second adsorption assembly. When the first adsorption assembly is in an adsorption state, the second adsorption assembly is in a desorption state; and when the first adsorption assembly is in a desorption state, the second adsorption assembly is in an adsorption state. This further improves the recovery efficiency of the first solvent recovery device.

[0120] In one embodiment, the adsorption component includes at least one of an adsorbent and a porous adsorption material.

[0121] Specifically, the present application configures the adsorption component as an adsorbent or a porous adsorption material, thereby achieving adsorption of a first sub-gaseous organic solvent with a relatively low concentration, thereby further improving the recovery effect of the first solvent recovery device.

[0122] In addition, by configuring the adsorption component as an adsorbent or a porous adsorption material, the present application can also achieve adsorption of the first sub-gaseous organic solvent at relatively low energy consumption, thereby further reducing the recovery cost of the first solvent recovery equipment.

[0123] In one embodiment, conveying the first gaseous organic solvent to a first solvent recovery device to form an organic solvent 4 comprises:

[0124] transporting the first gaseous organic solvent to a cold trap of the first solvent recovery device to form organic solvent 4 and a first sub-gaseous organic solvent;

[0125] The first sub-gaseous organic solvent is transported to the adsorption component of the first solvent recovery device to form organic solvent 4.

[0126] Specifically, since the adsorption effect of the adsorption component on the gaseous organic solvent 4 is poor, in order to further improve the recovery effect of the first solvent recovery equipment, the present application first cools the first gaseous organic solvent through the cold trap to form a first sub-gaseous organic solvent, and then adsorbs the first sub-gaseous organic solvent through the adsorption component and converts it into the organic solvent 4.

[0127] S104, transporting the first mixed rubber to a second mixing device for mixing to form a second gaseous organic solvent and a second mixed rubber.

[0128] It should be noted that, although the present application can remove part of the organic solvent 4 from the first mixed rubber through steps S102 and S103, foaming still occurs when testing the rubber product prepared using the first mixed rubber.

[0129] Therefore, the present application further mixes the first mixed rubber through the second mixing equipment, so that the organic solvent 4 remaining in the first mixed rubber can be further evaporated to form the second mixed rubber, thereby effectively avoiding the foaming phenomenon of the rubber product prepared from the second mixed rubber.

[0130] Although the second mixed rubber obtained by mixing in the second mixing apparatus still contains a trace amount of the organic solvent 4, this trace amount of organic solvent 4 is no longer sufficient to cause foaming in the rubber product. In other words, the second mixed rubber obtained by mixing in the second mixing apparatus can meet the requirements of rubber products.

[0131] In one embodiment, the banburying temperature of the second banburying device is greater than the boiling point of the organic solvent 4 and less than or equal to 180° C.; wherein the banburying temperature of the second banburying device is greater than the banburying temperature of the first banburying device.

[0132] Specifically, the present application increases the removal effect of the organic solvent 4 from the second mixed rubber by setting the mixing temperature of the second mixing equipment to be greater than the boiling point of the organic solvent 4 , when the second mixed rubber is prepared using the second mixing equipment.

[0133] Among them, since the mixing temperature of the second mixing equipment is greater than the boiling point of the organic solvent 4, in order to prevent the organic solvent 4 from evaporating into the external environment and then polluting the external environment, the second mixing equipment is preferably a sealable bucket mixer.

[0134] In other embodiments, in order to further improve the mixing effect of the second mixing device, the rotation speed of the rotor of the second mixing device is preferably 5 to 200 rpm.

[0135] Among them, since the organic solvent 4 contained in the first mixed rubber being mixed in the second mixing equipment has been significantly reduced, when the first mixed rubber is mixed using the second mixing equipment, the rotational speed of the rotor of the second mixing equipment should not be too high. For example, the rotational speed of the rotor of the second mixing equipment is preferably 5 to 50 rpm. In this way, when the first mixed rubber is mixed in the second mixing equipment, the molecular chains 6 of the first mixed rubber can be prevented from breaking due to strong shear force.

[0136] Furthermore, if the mixing temperature of the second mixing device is too high, oxidation of the first mixed rubber may occur. Therefore, to prevent oxidation of the first mixed rubber, the mixing temperature of the second mixing device is preferably less than or equal to 180°C.

[0137] In addition, in order to further improve the removal effect of the organic solvent 4 from the second mixed rubber, the mixing temperature of the second mixing equipment is preferably higher than the mixing temperature of the first mixing equipment.

[0138] In other embodiments, in order to further reduce the energy consumption of preparing the second mixed rubber, the mixing temperature of the second mixing equipment may be set to be 20 to 50° C. higher than the mixing temperature of the first mixing equipment.

[0139] In one embodiment, the mixing time of the second mixing equipment is 1 to 60 minutes.

[0140] Specifically, when the boiling point of the organic solvent 4 in the first mixed rubber is low and the mixing temperature of the second mixing equipment is low, the mixing time of the first mixing equipment can be relatively long. However, excessively long mixing time can cause breakage of the molecular chains 6 of the first mixed rubber, resulting in poor quality of the subsequently prepared second mixed rubber. Therefore, the mixing time of the first mixing equipment is preferably less than or equal to 60 minutes.

[0141] When the boiling point of the organic solvent 4 in the first mixed rubber is relatively high and the mixing temperature of the second mixing apparatus is relatively high, the mixing time of the second mixing apparatus can be relatively short. However, an excessively short mixing time will result in the organic solvent 4 not being removed from the second mixed rubber. Therefore, the mixing time of the first mixing apparatus is preferably greater than or equal to 1 minute.

[0142] Among them, since the first mixed rubber mixed in the second mixing device has been mixed once, and the second mixing device mixes the first mixed rubber at a higher mixing temperature, the mixing time of the second mixing device is preferably 1 to 3 minutes.

[0143] In one embodiment, the first mixed rubber is transported to a second mixing device for mixing to form a second gaseous organic solvent and a second mixed rubber, comprising:

[0144] The second internal mixing equipment is pumped to a negative pressure state using a negative pressure device.

[0145] Specifically, the present application pumps the second mixing device into a negative pressure state, so that when the first mixed rubber is mixed in the second mixing device, oxidation of the first mixed rubber can be effectively avoided.

[0146] In addition, the present application can make it easier to remove the organic solvent 4 from the second mixed rubber when the first mixed rubber is mixed in the second mixed rubber by pumping the second mixing equipment to a negative pressure state.

[0147] In addition, by providing the negative pressure device, the present application not only pumps the second mixing device to a negative pressure state, but also pumps the second gaseous organic solvent obtained by mixing the first mixed rubber in the second mixing device to a second solvent recovery device. The second solvent recovery device can collect the evaporated second gaseous organic solvent and convert it into the organic solvent 4, allowing the organic solvent 4 to be recycled. This not only improves the environmental performance of the rubber mixing method, but also further reduces the manufacturing cost of the mixed rubber.

[0148] In which, the structure of the second solvent recovery equipment can be the same as that of the first solvent recovery equipment, or different from that of the first solvent recovery equipment. For example, the second solvent recovery equipment can be only provided with the adsorption component. At this time, although the temperature of the second gaseous organic solvent is high, since the dosage of the second gaseous organic solvent produced is small, the present application can still achieve effective adsorption of the second gaseous organic solvent only through the adsorption component.

[0149] In one embodiment, the filler 2 includes white carbon black, and the auxiliary agent includes a coupling agent 5 .

[0150] Specifically, since the organic solvent 4 remaining in the first mixed rubber can achieve a viscosity-reducing effect on the first mixed rubber to a certain extent, and is beneficial to the coupling agent 5 to achieve a grafting reaction between the first mixed rubber and the filler 2, the present application sets the filler 2 to include white carbon black, and sets the auxiliary agent to include a coupling agent 5, so that when the first mixed rubber is mixed in the second mixing equipment, on the one hand, the evaporation efficiency of the second gaseous organic solvent from the first mixed rubber can be improved; on the other hand, the lubrication effect between the first mixed rubber and the second mixing equipment can be enhanced; on the other hand, the in-situ modification and dispersion effect of the filler 2 can be improved, so that the filler 2 can be more evenly dispersed in the molecular chain 6 of the second mixed rubber, thereby realizing the preparation of rubber products with low Payne effect and low heat generation.

[0151] For example Figure 4 、 Figure 5 and Figure 6As shown, the first mixed rubber obtained by mixing through the first mixing equipment will absorb a small amount of organic solvent 4 on its surface before mixing through the second mixing equipment. These organic solvents 4 can reduce the viscosity of the first mixed rubber on the one hand, and make the secondary structure 3 of the filler 2 loose on the other hand, thereby promoting the coupling agent 5 to peel off the secondary structure 3 formed by the agglomeration of the filler 2 during the second mixing process, that is, the aggregated filler 2 is dispersed and grafted by the coupling agent 5, thereby realizing the bridging of the molecular chain 6 of the second mixed rubber and the filler 2.

[0152] Furthermore, since the organic solvent 4 remains in the first mixed rubber, the energy consumed when mixing the first mixed rubber in the second mixing equipment will also decrease due to the decrease in viscosity of the first mixed rubber and the lubricating effect of the organic solvent 4, thereby effectively reducing the energy consumption consumed in preparing the first mixed rubber.

[0153] According to another embodiment of the present application, a rubber mixing device is provided, which prepares rubber using the rubber mixing method described in the embodiment of the present application.

[0154] According to another embodiment of the present application, a rubber is provided, which is prepared by the rubber mixing method described in the embodiment of the present application.

[0155] The present application is further described below with reference to specific embodiments.

[0156] Example 1

[0157] S101, at room temperature, cyclohexane (boiling point approximately 81°C), filler 2 formed by mixing carbon black and silica in a mass ratio of 1:9, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix A. The mass ratio of cyclohexane to silica is 1:1.

[0158] S102, kneading premix A and lump natural rubber in a bucket mixer at 85° C. for 1 minute to form a first mixed product A. The mass ratio of natural rubber to filler 2 is 1:1, the fill factor of the premix A and natural rubber is 0.8, the rotor speed of the bucket mixer is 30 rpm, and the torque of the bucket mixer is 130 kN·m.

[0159] S103, discharging the first mixed material A from the bucket mixer to form a first gaseous organic solvent A and a first mixed rubber A. The first gaseous organic solvent A is transported to a first solvent recovery device.

[0160] S104 , kneading the first mixed rubber A in a second internal mixing device at a temperature of 110° C. for 5 minutes to form a second gaseous organic solvent A and a second mixed rubber A. The rotation speed of the rotor of the second internal mixing device is 20 rpm.

[0161] Example 2

[0162] S201, at room temperature, cyclohexane (boiling point approximately 81°C), filler 2 formed by mixing carbon black and silica in a mass ratio of 2:8, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix B. The mass ratio of cyclohexane to silica is 1:1.

[0163] S202 , in a bucket mixer, knead premix B and isoprene rubber in strip form at 95° C. for 3 minutes to form a first mixed product B. The mass ratio of isoprene rubber to filler 2 is 1:1.5, the fill factor of the premix B and isoprene rubber is 0.5, the rotor speed of the bucket mixer is 50 rpm, and the torque of the bucket mixer is 180 kN·m.

[0164] S203 , discharging the first mixed material B from the bucket mixer to form a first gaseous organic solvent B and a first mixed rubber B. The first gaseous organic solvent B is transported to a first solvent recovery device.

[0165] S204 , in a second internal mixing device, under negative pressure, the first mixed rubber B is internally mixed at 120° C. for 5 minutes to form a second gaseous organic solvent B and a second mixed rubber B. The rotor of the second internal mixing device rotates at 30 rpm.

[0166] Example 3

[0167] S301, at room temperature, n-hexane (boiling point approximately 69°C), filler 2 formed by mixing carbon black and silica in a mass ratio of 1:9, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix C. The mass ratio of n-hexane to silica is 1:1.

[0168] S302 , in a bucket mixer, knead premix C and bulk solution-polymerized styrene-butadiene rubber at 75° C. for 5 minutes to form a first mixture C. The mass ratio of the solution-polymerized styrene-butadiene rubber to filler 2 is 1:1, the fill factor of the premix C and solution-polymerized styrene-butadiene rubber is 0.7, the rotor speed of the bucket mixer is 60 rpm, and the torque of the bucket mixer is 135 kN·m.

[0169] S303 , discharging the first mixed material C from the bucket mixer to form a first gaseous organic solvent C and a first mixed rubber C. The first gaseous organic solvent C is transported to a first solvent recovery device.

[0170] S304 , in a second internal mixing device, the first mixed rubber C is internally mixed at 120° C. for 3 minutes under negative pressure to form a second gaseous organic solvent C and a second mixed rubber C. The rotor of the second internal mixing device rotates at 20 rpm.

[0171] Example 4

[0172] S401, petroleum ether (boiling point about 90° C.), white carbon black, and an oil-containing additive are mixed in a kneader at room temperature to form a powder-like premix D. The mass ratio of petroleum ether to white carbon black is 1:1.5.

[0173] S402 , in a bucket mixer, knead premix D and emulsion-polymerized styrene-butadiene rubber (ESBR) in a block form for 5 minutes at 125° C. to form a first mixture D. The mass ratio of the EBR to silica is 1:0.9, the fill factor of the premix D and the EBR is 0.8, and the rotor speed of the bucket mixer is 70 rpm.

[0174] S403 , discharging the first mixed material D from the bucket mixer to form a first gaseous organic solvent D and a first mixed rubber D. The first gaseous organic solvent D is transported to a first solvent recovery device.

[0175] S404 , in a second internal mixing device, under negative pressure, the first mixed rubber D is internally mixed at 170° C. for 1 minute to form a second gaseous organic solvent D and a second mixed rubber D. The rotor of the second internal mixing device rotates at a speed of 5 rpm.

[0176] Example 5

[0177] S501, at room temperature, carbon tetrachloride (boiling point about 77° C.), white carbon black, and an oil-containing additive are mixed in a kneader to form a powder-like premix E. The mass ratio of carbon tetrachloride to white carbon black is 1.25:1.

[0178] S502 , kneading premix E and rubber E in a bucket mixer at 80° C. for 5 minutes to form a first mixture E. The mass ratio of rubber to silica is 1:1.5, the filling factor of the premix E and rubber is 0.5, the rotor speed of the bucket mixer is 100 rpm, and the rubber is a mixture of natural rubber and butadiene rubber in a mass ratio of 1:1.

[0179] S503 , discharging the first mixed material E from the bucket mixer to form a first gaseous organic solvent E and a first mixed rubber E. The first gaseous organic solvent E is transported to a first solvent recovery device.

[0180] S504 , in a second internal mixing device, internally mixing the first mixed rubber E at a temperature of 100° C. for 10 minutes to form a second gaseous organic solvent E and a second mixed rubber E. The rotation speed of the rotor of the second internal mixing device is 30 rpm.

[0181] Example 6

[0182] S601, at room temperature, ethyl acetate (boiling point of approximately 77° C.), white carbon black, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix F. The mass ratio of ethyl acetate to white carbon black is 1:1.

[0183] S602 , kneading the premix F and polyester rubber in a bucket mixer at 95° C. for 4 minutes to form a first mixture F. The mass ratio of polyester rubber to silica is 1:1.25, the fill factor of the premix F and polyester rubber is 0.7, and the rotor speed of the bucket mixer is 60 rpm.

[0184] S603 , discharging the first mixed material F from the bucket mixer to form a first gaseous organic solvent F and a first mixed rubber F. The first gaseous organic solvent F is transported to a first solvent recovery device.

[0185] S604 , kneading the first mixed rubber F at a temperature of 130° C. for 5 minutes in a second internal mixing device to form a second gaseous organic solvent F and a second mixed rubber F. The rotation speed of the rotor of the second internal mixing device is 10 rpm.

[0186] Example 7

[0187] S701, at room temperature, carbon tetrachloride (boiling point about 77°C), white carbon black, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix G. The mass ratio of carbon tetrachloride to white carbon black is 1.25:1.

[0188] S702, kneading the premix G and rubber in a bucket mixer at 80° C. for 30 minutes to form a first mixture G. The mass ratio of rubber to silica is 1:1.5, the filling factor of the premix G and rubber is 0.5, the rotor speed of the bucket mixer is 70 rpm, and the rubber is a mixture of natural rubber and nitrile rubber in a mass ratio of 4:1.

[0189] S703 , discharging the first mixed material G from the bucket mixer to form a first gaseous organic solvent G and a first mixed rubber G. The first gaseous organic solvent G is transported to a first solvent recovery device.

[0190] S704 , in a second internal mixing device, internally mix the first mixed rubber G at a temperature of 100° C. for 15 minutes to form a second gaseous organic solvent G and a second mixed rubber G. The rotation speed of the rotor of the second internal mixing device is 15 rpm.

[0191] Example 8

[0192] S801, at room temperature, n-hexane (boiling point about 69° C.), white carbon black, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix H. The mass ratio of n-hexane to white carbon black is 1.25:1.

[0193] S802, kneading the premix H and rubber in a bucket mixer at 70° C. for 60 minutes to form a first mixture H. The mass ratio of rubber to silica is 1:1, the fill factor of the premix H and rubber is 0.6, the rotor speed of the bucket mixer is 75 rpm, and the rubber is a mixture of natural rubber and bio-based itaconate rubber in a mass ratio of 4:1.

[0194] S803, discharging the first mixed material H from the bucket mixer to form a first gaseous organic solvent H and a first mixed rubber H. The first gaseous organic solvent H is transported to a first solvent recovery device.

[0195] S804: In a second internal mixing device, the first mixed rubber H is internally mixed at a temperature of 80° C. for 60 minutes to form a second gaseous organic solvent H and a second mixed rubber H. The rotation speed of the rotor of the second internal mixing device is 5 rpm.

[0196] Example 9

[0197] S901, at room temperature, n-heptane (boiling point about 98°C), white carbon black, and an oil-containing additive are mixed in a sealable bucket mixer to form a powder-like premix I. The mass ratio of n-heptane to white carbon black is 1:1.5.

[0198] S902: In a bucket mixer, knead the premix I and rubber at 100° C. for 3 minutes to form a first mixture I. The mass ratio of rubber to silica is 1:1, the fill factor of the premix I and rubber is 0.7, the rotor speed of the bucket mixer is 65 rpm, and the rubber is a mixture of natural rubber and bio-based eucommia rubber in a mass ratio of 4:1.

[0199] S903, the first mixed material I is discharged from the bucket mixer to form a first gaseous organic solvent I and a first mixed rubber I. The first gaseous organic solvent I is transported to a first solvent recovery device.

[0200] S904 , in a second internal mixing device, internally mixing the first mixed rubber I at a temperature of 110° C. for 5 minutes to form a second gaseous organic solvent I and a second mixed rubber I. The rotation speed of the rotor of the second internal mixing device is 20 rpm.

[0201] Example 10

[0202] S1001, cyclohexane (boiling point about 81°C), white carbon black, and an oil-containing additive are mixed in a sealable bucket mixer at room temperature to form a powder-like premix J. The mass ratio of cyclohexane to white carbon black is 1:1.

[0203] S1002, in a bucket mixer, knead the premix J and rubber at 100° C. for 1 minute to form a first mixture J. The mass ratio of rubber to silica is 1:2, the filling factor of the premix J and rubber is 0.5, the rotor speed of the bucket mixer is 60 rpm, and the rubber is a mixture of natural rubber and solution-polymerized styrene-butadiene rubber in a mass ratio of 1:1.

[0204] S1003 , discharging the first mixed material J from the bucket mixer to form a first gaseous organic solvent J and a first mixed rubber J. The first gaseous organic solvent J is transported to a first solvent recovery device.

[0205] S1004 , in a second internal mixing device, internally mixing the first mixed rubber J at a temperature of 130° C. for 1 minute to form a second gaseous organic solvent J and a second mixed rubber J. The rotation speed of the rotor of the second internal mixing device is 30 rpm.

[0206] Comparative Example 1

[0207] D101, uses organic solvent to disperse silica and additives to form silica K and additive K.

[0208] D102, after masticating the natural rubber, transport it to a mixing equipment for mixing. When the mixing temperature of the mixing equipment is 60°C, additive K is added to form a mixture.

[0209] D103, adding silica K into a mixer in three portions to form mixed rubber K. The mixing was stopped when the mixing temperature of the mixer reached 81°C, and the mass ratio of natural rubber to silica was 1:1.

[0210] The mixed rubbers prepared in Examples 1 to 10 and Comparative Example 1 were prepared into rubber products, and the rubber products were tested. The tests showed that the rubber products prepared from the mixed rubbers prepared in Examples 1 to 10 did not exhibit foaming, while the rubber product prepared from the mixed rubber prepared in Comparative Example 1 exhibited severe foaming.

[0211] Therefore, the mixed rubber prepared by the rubber mixing method of the present application can effectively avoid the foaming phenomenon of the mixed rubber and the rubber products prepared from the mixed rubber.

[0212] Furthermore, when using the traditional dry mixing method for preparing rubber, for example, when preparing a rubber compound containing 30 to 50 parts of filler, the torque value of the rubber mixing equipment will reach 360 kN·m or even higher, resulting in excessive energy consumption of the rubber mixing equipment.

[0213] In comparison, the compounded rubber prepared by the rubber mixing method described in this application, as shown in Examples 1 to 3 above, can be prepared by only using a smaller torque value, thereby effectively reducing the energy consumption during compounding of the compounded rubber.

[0214] The above embodiments focus on the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. Considering the simplicity of the text, they will not be repeated here.

[0215] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A rubber mixing method, characterized in that: include: mixing the organic solvent, filler and additive to form a premix; The premix and the rubber composition are conveyed to a first internal mixing device for internal mixing to form a first mixed product; Discharging the first mixed product from the first internal mixing device to form a first gaseous organic solvent and a first mixed rubber; The first mixed rubber is transported to a second mixing device for mixing to form a second gaseous organic solvent and a second mixed rubber.

2. The rubber mixing method according to claim 1, wherein The organic solvent comprises at least one of cyclohexane, n-hexane, petroleum ether, carbon tetrachloride, ethyl acetate, gasoline and n-heptane; The filler comprises at least one of carbon black and white carbon black; The mass ratio of the organic solvent to the filler is 1:(0.8-1.5).

3. The rubber mixing method according to claim 1, wherein The filling coefficient of the material composed of the premix and the rubber composition in the first internal mixing equipment is 0.5 to 0.

8.

4. The rubber mixing method according to claim 1, wherein The mixing temperature of the first mixing equipment is greater than the boiling point of the organic solvent and less than or equal to 180° C. The mixing time of the first mixing equipment is 1 to 60 minutes.

5. The rubber mixing method according to claim 4, wherein The mixing temperature of the second mixing device is greater than the boiling point of the organic solvent and is less than or equal to 180° C.; wherein the mixing temperature of the second mixing device is greater than the mixing temperature of the first mixing device; The mixing time of the second mixing equipment is 1 to 60 minutes.

6. The rubber mixing method according to claim 1, wherein Discharging the first mixed product from the first internal mixing device to form a first gaseous organic solvent and a first mixed rubber includes: The first gaseous organic solvent is transported to a first solvent recovery device to form an organic solvent.

7. The rubber mixing method according to claim 6, characterized in that The first gaseous organic solvent is transported to a first solvent recovery device to form an organic solvent, comprising: transporting the first gaseous organic solvent to a cold trap of the first solvent recovery device to form an organic solvent and a first sub-gaseous organic solvent; The first sub-gaseous organic solvent is transported to the adsorption component of the first solvent recovery device to form an organic solvent.

8. The rubber mixing method according to claim 1, wherein The first mixed rubber is transported to a second mixing device for mixing to form a second gaseous organic solvent and a second mixed rubber, comprising: The second internal mixing equipment is pumped to a negative pressure state using a negative pressure device.

9. A rubber mixing device, characterized in that: The rubber mixing device prepares rubber using the rubber mixing method according to any one of claims 1 to 8.

10. A rubber, characterized in that: The rubber is prepared by the rubber mixing method according to any one of claims 1 to 8.

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