CN117247598A - High-performance liquid reclaimed rubber and preparation method thereof - Google Patents
High-performance liquid reclaimed rubber and preparation method thereof Download PDFInfo
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- CN117247598A CN117247598A CN202311335288.3A CN202311335288A CN117247598A CN 117247598 A CN117247598 A CN 117247598A CN 202311335288 A CN202311335288 A CN 202311335288A CN 117247598 A CN117247598 A CN 117247598A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 109
- 239000005060 rubber Substances 0.000 title claims abstract description 109
- 239000007788 liquid Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 61
- 230000023556 desulfurization Effects 0.000 claims abstract description 61
- 239000000843 powder Substances 0.000 claims abstract description 50
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 238000012691 depolymerization reaction Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000011295 pitch Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 4
- 239000010692 aromatic oil Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011297 pine tar Substances 0.000 claims description 3
- 229940068124 pine tar Drugs 0.000 claims description 3
- 239000010920 waste tyre Substances 0.000 claims description 3
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 2
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 239000003784 tall oil Substances 0.000 claims description 2
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 238000010008 shearing Methods 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 4
- 239000012535 impurity Substances 0.000 abstract description 4
- 239000004902 Softening Agent Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010092 rubber production Methods 0.000 abstract 1
- 238000009826 distribution Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000010426 asphalt Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L17/00—Compositions of reclaimed rubber
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2319/00—Characterised by the use of rubbers not provided for in groups C08J2307/00 - C08J2317/00
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention provides a high-performance liquid reclaimed rubber and a preparation method thereof, wherein the method comprises the following steps: putting the waste rubber powder and the softening agent into a stirrer, and stirring under a closed condition to obtain primary desulfurization rubber powder; transferring the primary desulfurization rubber powder into a three-screw extruder for desulfurization and depolymerization reaction; transferring the desulfurization depolymerization product to a single screw extruder, cooling and extruding from the single screw extruder to obtain the liquid regenerated rubber. The invention utilizes the self-friction effect to complete the mixing, preheating and preliminary desulfurization of the waste rubber powder and the softening agent, further damages the cross-linked network in the desulfurization rubber powder under the action of temperature under the action of strong material conveying, shearing and mixing capacity in the three-screw extruder, realizes the desulfurization and depolymerization of the waste rubber, and then obtains the liquid regenerated rubber through cooling of the single-screw extruder. The liquid reclaimed rubber production process is reasonably and optimally configured, so that the high-performance liquid reclaimed rubber with few impurities and good fineness is obtained, and the whole production process is safe and environment-friendly.
Description
Technical Field
The invention relates to the field of chemical materials, in particular to high-performance liquid reclaimed rubber and a preparation method thereof.
Background
Reclaimed rubber has become the third most widely used type of rubber after natural and synthetic rubber. In recent years, as the traditional high-temperature high-pressure dynamic desulfurization tank method is phased out, the normal-pressure continuous desulfurization regeneration method is popularized, the gradual emergence of liquid (paste) reclaimed rubber or low-Mooney viscosity reclaimed rubber gradually goes to the market, and the problems of various technical difficulties are faced, and although the desulfurization degree is deepened, the problem of fineness caused by differentiated utilization scenes is unavoidable.
The fineness is a problem reflecting the desulfurization uniformity of reclaimed rubber, and mainly comprises two aspects: macroscopic uniformity of desulfurization degree of each rubber powder particle, plasticity (Mooney viscosity value) directly influences product smoothness, and viscosity is too large to be easily mixed and extruded; on the other hand, the problem of internal and external desulfurization uniformity of single rubber powder particles is the problem of a 'core-shell' structure. According to Zhang Liqun and the like, in CN102601975B (a method for continuously preparing liquid reclaimed rubber by using a screw extruder), the grain size of rubber powder is 0.1-10 mm, and materials are considered to be extruded from a screw head to obtain the required reclaimed rubber, so that the processes of subsequent refining and the like are not needed, and the energy consumption is greatly reduced; it is not appreciated that there is an inevitable pinch in the desulfurization of the gum powder.
At present, the report of producing the liquid regenerated rubber is not much, most of the report is concentrated in the use of a screw extruder, such as Chen Chengjie and the like, in CN111675828B 'preparation process of the liquid regenerated rubber', in order to enable the liquid rubber to be better used in asphalt, the 22-mesh-100-mesh heavy truck radial tire broken rubber powder is directly extruded through the reaction of five sections of a heat conveying section, a shearing mixing section, a homogenizing desulfurization section, a strengthening desulfurization section and an extrusion conveying section of an extruder screw, the clearance between the screw and a machine barrel is limited to be 0.5-1.5 mm, and the clearance between the screw and the machine barrel is limited to be 0.5-1.5 mm through the concentrated action of dense strong shearing elements, so that the deep desulfurization of the rubber powder is completed through the fixed point 'cleaning' action of mechanical shearing. Finally, the regenerated rubber in a liquid state with uniform quality and stable state is obtained. Although the importance of uniform devulcanization is perceived, the problem of poor heat conduction of the rubber powder is not solved, and as high as 380-420 ℃ set temperature, the rubber hydrocarbon has already undergone degradation reaction, while the preparation of a liquid reclaimed rubber with a finished mooney viscosity of 5-10 [ ml (1+4) 100 ℃ is indicative of a low degree of devulcanization.
In the current stage, for preparing the liquid reclaimed rubber, the scheme design is needed to be carried out on the production of the liquid reclaimed rubber in principle under the new requirement, so that the application range of the liquid reclaimed rubber can be enlarged.
Disclosure of Invention
The present invention provides a method for preparing high performance liquid reclaimed rubber to solve or at least alleviate at least one of the problems of the prior art.
The invention provides a preparation method of high-performance liquid reclaimed rubber, which comprises the following steps:
putting the waste rubber powder and the softener into a stirrer, stirring at 400-1000 rpm under a closed condition for 5-15 min, and heating to 180-220 ℃ to obtain primary desulfurization rubber powder;
transferring the preliminary desulfurization rubber powder into a three-screw extruder for desulfurization and depolymerization reaction to obtain a desulfurization and depolymerization product, wherein the reaction condition of the desulfurization and depolymerization reaction is 200-300 ℃ for 1-3 min;
extruding the desulfurization and depolymerization product from the three-screw extruder, transferring the desulfurization and depolymerization product to a single-screw extruder, and extruding the single-screw extruder after the single-screw extruder is subjected to the temperature of 5-35 ℃ for 1-2 min to obtain the liquid regenerated rubber.
As a preferred embodiment of the invention, the size of the waste rubber powder is 10-40 meshes, and the sources of the waste rubber powder comprise leftover materials and waste tires. The waste rubber powder can be a mixture of leftover materials and waste tires.
As a preferred embodiment of the present invention, the softener includes at least one of pine tar pitch, tall oil pitch, aromatic oil pitch, and rosin.
As a preferred embodiment of the present invention, the mass ratio of the waste rubber powder to the softener is 100 (0-8).
The Mooney viscosity of the primary desulfurization rubber powder is 120-200.
As a preferred embodiment of the present invention, the transferring the preliminary desulfurization rubber powder into a three-screw extruder for desulfurization and depolymerization reaction comprises: and transferring the primary desulfurization rubber powder into a three-screw extruder through a metering feeding device by a continuous airtight heat-preserving conveying device to carry out desulfurization and depolymerization reaction.
As a preferred embodiment of the invention, the metering device comprises a conical twin-screw feeder and a single-screw forced feeder.
As a preferred embodiment of the present invention, extruding and transferring the desulfurization depolymerization product from the three-screw extruder to a single-screw extruder comprises: extruding and butting the desulfurization and depolymerization product from the three-screw extruder into a single-screw extruder.
As a preferable implementation mode of the invention, the central connecting line of three screws of the three-screw extruder is in a straight-line arrangement or inverted-Y-shaped arrangement, the diameter ratio is 28:1-40:1, and the machine barrel is provided with an exhaust port.
As a preferable embodiment of the invention, the length-diameter ratio of the screw of the single screw extruder is 20:1-32:1, the compression ratio is 1.1-1.2, and the machine barrel is provided with a vent.
In a preferred embodiment of the invention, a switch and an exhaust valve are arranged at a feed inlet of the stirrer, and the stirrer is in a closed oxygen-isolation state during stirring.
As a preferred embodiment of the present invention, the single screw extruder is equipped with a molding die and provided with a 20-80 mesh filter device.
The invention provides high-performance liquid reclaimed rubber, which is prepared by the preparation method of the high-performance liquid reclaimed rubber.
The sol content of the high-performance liquid reclaimed rubber prepared by the preparation method of the high-performance liquid reclaimed rubber is more than 70%, the number average molecular weight Mn is 8000-20000, and the molecular weight distribution is 5-10.
Compared with the prior art, the invention has at least the following beneficial effects:
the key points for preparing the liquid reclaimed rubber are defined in technical theory through researching and analyzing the technical principle of preparing the reclaimed rubber by desulfurizing and depolymerizing the traditional waste rubber and the technical equipment selected by the technical principle. Starting from poor thermal conductivity of waste rubber powder, the waste rubber powder is uniformly heated from inside to outside through self-friction heating under a closed condition in a stirrer, a primary desulfurization state is achieved, a three-dimensional cross-linked network structure is changed into a relatively loose structure, the temperature of a screw is reasonably controlled in a three-screw extruder, the material shearing efficiency is effectively improved, the depolymerization temperature is lower, cracking oil gas caused by excessive temperature is greatly reduced, waste gas generated by desulfurization depolymerization is reasonably discharged through a gas outlet after the waste rubber powder enters a single-screw extruder, the odor of rubber materials is reduced, the impurities in the rubber powder and partial uneven rubber materials are further reduced through a machine head filtering device, the quality of regenerated rubber is further improved, the high-performance liquid regenerated rubber with few impurities and good fineness is obtained, and the whole production process is safe and environment-friendly.
The invention is based on the current situation of industry, and simultaneously carries out reasonable connection and series connection on waste rubber powder for uniform heat transfer, desulfurization and depolymerization and cooling, and the invention fully exerts the characteristics of flexible and changeable geometric arrangement mode and multiple shearing engagement areas of the three-screw extruder by adding the primary desulfurization rubber powder obtained by destroying the three-dimensional network structure into the three-screw extruder for desulfurization, so that the material forms multiple changes in flow direction and flow velocity, the rolling area is multiplied, and the efficient extrusion, crushing, kneading, calendaring and stretching effects on the material can be formed. Compared with the prior art, the double-screw extruder has the advantages that the yield is greatly improved on the premise of little increase of energy consumption, and a higher productivity ratio can be obtained with a small length-diameter ratio; based on finite element analysis and calculation, calculation of dynamic friction coefficients of materials and screws, and the like, the preparation method of the high-performance liquid reclaimed rubber provided by the invention not only realizes safety, environmental protection, continuity and energy conservation in the whole process, but also improves the processability and quality stability of the obtained product through reasonable configuration and design of the power, torque, abrasion and the like of the three-screw extruder.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below. The present invention provides exemplary embodiments, however, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Unless specifically stated otherwise, the reagents, methods and apparatus employed in the present invention are those conventional in the art.
Example 1
After 10-mesh waste passenger car full-tire rubber powder is put into a stirrer, the temperature is raised to 220 ℃ for 15min under the airtight condition, the preliminary desulfurization rubber powder with the Mooney viscosity of 120 is obtained, the preliminary desulfurization rubber powder enters a three-screw extruder with the length-diameter ratio of 40:1 through a metering and feeding device by a continuous airtight heat-preserving conveying device to carry out desulfurization and depolymerization reaction, the reaction condition is that the reaction is 300 ℃ for 3min, the reaction is extruded by the three-screw extruder, the reaction is then abutted into a single-screw extruder with the length-diameter ratio of 32:1 and the compression ratio of 1.1, the next single-screw extruder with the length-diameter ratio of 32:1 is filtered and extruded by a 80-mesh screen for 2min at the temperature of 5 ℃ to obtain the liquid reclaimed rubber with the sol content of 72%, the number average molecular weight Mn of 19101 and the molecular weight distribution of 9.5.
Example 2
After the tread rubber powder of the load tire with 20 meshes and the aromatic oil asphalt are put into a stirrer according to the mass ratio of 100:8, the temperature is raised to 200 ℃ for 10min under the closed condition, the preliminary desulfurization rubber powder with the Mooney viscosity of 160 is obtained, the preliminary desulfurization rubber powder enters a three-screw extruder with the length-diameter ratio of 36:1 through a metering and feeding device by a continuous closed heat preservation conveying device for desulfurization and depolymerization reaction, the reaction condition is that the reaction is carried out for 2min at 250 ℃, the reaction is extruded by the three-screw extruder, the reaction is then abutted into a single-screw extruder with the length-diameter ratio of 24:1 and the compression ratio of 1.15, the liquid reclaimed rubber product with the temperature of 52 ℃ is obtained after the filtration and extrusion by a 60-mesh screen at the temperature of 15 ℃ for 1.5min, the sol content of 79%, the number average molecular weight Mn of 13819 and the molecular weight distribution of 7.3.
Example 3
After 30-mesh heavy-duty tire tread rubber powder and pine tar pitch are put into a stirrer according to the mass ratio of 100:4, the temperature is raised to 180 ℃ for 10min under the closed condition, the preliminary desulfurization rubber powder with the Mooney viscosity of 180 is obtained, the preliminary desulfurization rubber powder enters a three-screw extruder with the length-diameter ratio of 32:1 through a metering and feeding device by a continuous closed heat-preserving conveying device for desulfurization and depolymerization reaction, the reaction condition is that the reaction is 230 ℃ for 1.5min, the extruder is extruded, the extruder is abutted into a single-screw extruder with the length-diameter ratio of 28:1 and the compression ratio of 1.18, the single-screw extruder is filtered and extruded by a 40-mesh screen for 1.5min at the temperature of 25 ℃ to obtain a liquid reclaimed rubber product with the temperature of 45 ℃, the sol content of 80%, the number average molecular weight Mn of 10810 and the molecular weight distribution of 6.7.
Example 4
After 40-mesh loading full-tire rubber powder is put into a stirrer, the temperature is raised to 180 ℃ for 5min under the airtight condition, the preliminary desulfurization rubber powder with the Mooney viscosity of 200 is obtained, then the preliminary desulfurization rubber powder enters a three-screw extruder with the length-diameter ratio of 28:1 through a metering and feeding device by a continuous airtight heat-preserving conveying device to carry out desulfurization and depolymerization reaction, the reaction condition is that the reaction is carried out for 1min at 200 ℃, the extruder is extruded, then the obtained product is abutted into a single-screw extruder with the length-diameter ratio of 20:1 and the compression ratio of 1.2, the obtained product is filtered and extruded by a 20-mesh screen at the temperature of 35 ℃ to obtain a liquid reclaimed rubber product with the sol content of 82%, the number average molecular weight Mn of 8710 and the molecular weight distribution of 5.2.
The invention utilizes the self-friction effect to complete the mixing, preheating and preliminary desulfurization of the waste rubber powder and the softening agent, further damages the cross-linked network in the desulfurization rubber powder under the action of temperature under the action of strong material conveying, shearing and mixing capacity in the three-screw extruder, realizes the desulfurization and depolymerization of the waste rubber, and then obtains the liquid regenerated rubber through cooling of the single-screw extruder. The production process of the liquid reclaimed rubber is reasonably optimized and configured, and the high-performance liquid reclaimed rubber with few impurities and good fineness is obtained through the two-stage desulfurization and depolymerization and the adaptive exhaust and filtering device, so that the whole production process is safe and environment-friendly.
It should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the method of the invention should not be interpreted as reflecting the intention: i.e., the claimed invention requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The foregoing is merely illustrative of the embodiments of the present invention and is not intended to be limiting in any way or nature, and it should be noted that modifications and additions to the ordinary skill in the art without departing from the method of the present invention are also contemplated as falling within the scope of the present invention; equivalent embodiments of the present invention will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, and modifications, to which the invention pertains; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present invention still fall within the protection scope of the present invention.
Claims (10)
1. A preparation method of high-performance liquid reclaimed rubber is characterized by comprising the following steps:
putting the waste rubber powder and the softener into a stirrer, stirring at 400-1000 rpm under a closed condition for 5-15 min, and heating to 180-220 ℃ to obtain primary desulfurization rubber powder;
transferring the preliminary desulfurization rubber powder into a three-screw extruder for desulfurization and depolymerization reaction to obtain a desulfurization and depolymerization product, wherein the reaction condition of the desulfurization and depolymerization reaction is 200-300 ℃ for 1-3 min;
extruding the desulfurization and depolymerization product from the three-screw extruder, transferring the desulfurization and depolymerization product to a single-screw extruder, and extruding the single-screw extruder after the single-screw extruder is subjected to the temperature of 5-35 ℃ for 1-2 min to obtain the liquid regenerated rubber.
2. The method for producing a high-performance liquid reclaimed rubber according to claim 1, wherein the mass ratio of the waste rubber powder to the softener is 100 (0 to 8).
3. The method for producing a high-performance liquid reclaimed rubber according to claim 1, wherein the size of the waste rubber powder is 10-40 mesh, and the source of the waste rubber powder comprises scrap scraps and waste tires.
4. The method for producing a high-performance liquid reclaimed rubber of claim 1 wherein the softener comprises at least one of pine tar pitch, tall oil pitch, aromatic oil pitch, and rosin.
5. The method for producing a high-performance liquid reclaimed rubber as claimed in claim 1, wherein said transferring said preliminary devulcanized rubber powder into a three-screw extruder for devulcanization depolymerization reaction comprises: and transferring the primary desulfurization rubber powder into a three-screw extruder through a metering feeding device by a continuous airtight heat-preserving conveying device to carry out desulfurization and depolymerization reaction.
6. The method for producing a high-performance liquid reclaimed rubber as claimed in claim 5, wherein the metering device comprises a conical twin-screw feeder and a single-screw forced feeder.
7. The method for preparing the high-performance liquid reclaimed rubber according to claim 1, wherein the three screw central connecting lines of the three screw extruder are arranged in a straight shape or inverted-Y shape, the diameter ratio is 28:1-40:1, and the machine barrel is provided with an exhaust port.
8. The method for preparing the high-performance liquid reclaimed rubber according to claim 1, wherein the single screw extruder has a screw length-diameter ratio of 20:1-32:1, a compression ratio of 1.1-1.2 and a cylinder provided with an exhaust port;
and/or the number of the groups of groups,
the single screw extruder is provided with a forming machine head and is provided with a 20-80-mesh filtering device.
9. The method for producing a high-performance liquid reclaimed rubber according to any one of claims 1 to 8, wherein the feed inlet of the mixer is provided with a switch and an exhaust valve, and the mixer is in a closed oxygen-isolation state during mixing.
10. The high-performance liquid reclaimed rubber is characterized in that the high-performance liquid reclaimed rubber is prepared by the preparation method of the high-performance liquid reclaimed rubber according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311335288.3A CN117247598A (en) | 2023-10-16 | 2023-10-16 | High-performance liquid reclaimed rubber and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311335288.3A CN117247598A (en) | 2023-10-16 | 2023-10-16 | High-performance liquid reclaimed rubber and preparation method thereof |
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| CN117247598A true CN117247598A (en) | 2023-12-19 |
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| CN202311335288.3A Pending CN117247598A (en) | 2023-10-16 | 2023-10-16 | High-performance liquid reclaimed rubber and preparation method thereof |
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- 2023-10-16 CN CN202311335288.3A patent/CN117247598A/en active Pending
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