A low-temperature resistant and gas-permeable rubber material and its preparation method and application

Abstract

The present invention belongs to the field of rubber technology, and specifically relates to a low-temperature resistant and gas-proof rubber material, and a preparation method and application thereof. In the anti-permeation rubber material formula provided by the present invention, chlorinated butyl rubber with good air tightness and butadiene rubber with excellent low-temperature resistance are selected as the main rubber species, a certain amount of carbon black is added to improve the air tightness of the rubber material, and a low-temperature plasticizer is added to improve the low-temperature resistance of the rubber material. In this way, not only can the prepared anti-permeation rubber material have good air tightness, but also the rubber material has excellent low-temperature resistance, so that the liquid carbon dioxide delivery hose has better safety performance.

Description

Technical Field

[0001] The invention belongs to the technical field of rubber, and in particular relates to a low-temperature resistant and gas-permeable rubber material and a preparation method and application thereof. Background Art

[0002] Liquid carbon dioxide is a refrigerant that can be used to preserve food and to make artificial rain. It is also an industrial raw material that can be used to make soda ash, urea and soda. Liquid carbon dioxide is also used in welding, foundry industry, refreshing drinks, fire extinguishing agents, pesticides, antioxidants, plant growth promoters, sugar industry, etc. It has a wide range of uses.

[0003] Carbon dioxide has a low molecular weight and can easily penetrate the pipe wall into the environment, especially under high temperature and high pressure, which will accelerate the penetration rate. Therefore, minimizing the penetration of liquid carbon dioxide during transportation can reduce environmental pollution. Currently, the liquid carbon dioxide delivery pipelines mostly used are stainless steel pipes. This delivery method has spatial location restrictions and is inconvenient to move; the delivery hoses used have poor air tightness, and carbon dioxide can easily penetrate into the environment, causing environmental pollution. Summary of the invention

[0004] The purpose of the present invention is to provide a low-temperature resistant and gas-permeation-proof rubber material and its preparation method and application, so as to overcome the shortcomings of the prior art. The rubber material has excellent low-temperature resistance and excellent air tightness, and at the same time has excellent bonding performance with anti-permeation resin, which can ensure the integrity of the pipe body and prevent the anti-permeation resin and rubber layer from delaminating when the pipe body is compressed and deformed, thereby extending the service life of the liquid carbon dioxide delivery hose; the combination of the anti-permeation rubber material and the anti-permeation resin reduces the probability of carbon dioxide penetrating into the environment to a minimum.

[0005] In order to achieve the above object, the technical solution of the present invention is:

[0006] In a first aspect, the present invention provides a low-temperature resistant and gas-permeable rubber material, which is composed of the following raw materials, by weight: 50 to 80 parts of chlorinated butyl rubber, 20 to 50 parts of butadiene rubber, 1 to 2 parts of stearic acid, 4 to 7 parts of activator, 5 to 10 parts of reinforcing resin, 2 to 4 parts of antioxidant, 3 to 5 parts of adhesive, 60 to 90 parts of carbon black, 10 to 15 parts of low-temperature plasticizer, 2 to 4 parts of stabilizer, 2 to 4 parts of main vulcanizer, 0.5 to 1.5 parts of co-vulcanizer and 0.5 to 1.5 parts of accelerator.

[0007] The inventive concept adopted by the present invention is: using chlorinated butyl rubber with good air tightness and butadiene rubber with excellent low-temperature resistance as the main rubber species, adding carbon black to improve the air tightness of the rubber, and adding a low-temperature plasticizer to improve the low-temperature resistance of the rubber. In this way, not only can the prepared anti-permeation rubber have good air tightness, but also the rubber has excellent low-temperature resistance, so that the liquid carbon dioxide delivery hose has better safety performance.

[0008] Among them, reinforcing resin can significantly improve the tensile strength, elongation, and tear resistance of the rubber, and can also improve the aging resistance of the rubber; activator can increase the activity of organic accelerator, reduce the amount of accelerator or shorten the vulcanization time, and can also improve the vulcanization degree of vulcanized rubber, and improve the physical and mechanical properties and aging resistance of rubber products; stabilizer can improve the thermal stability of rubber products, prevent thermal aging, and enable rubber products to remain stable at high temperatures. It can be combined with antioxidants and activators to improve the physical and mechanical properties and aging resistance of rubber products.

[0009] Carbon black has good reinforcing properties for rubber and can give the rubber particles higher tensile strength, tear strength, abrasion resistance and elasticity. Semi-reinforcing carbon black with large particle size and low structure can be filled in large quantities. Increasing the filling amount can improve the air tightness of the rubber, thereby improving the anti-permeation performance of the rubber.

[0010] The inventors found in the research process that if any raw material component is reduced or the raw material components of the present invention are replaced on the basis of the above rubber material composition, the overall effect of the rubber material on low temperature resistance and gas permeation resistance is significantly reduced; if other raw material components are added on the basis of the rubber material composition of the present application, the overall effect of the rubber material is not significantly improved, and there is even a situation where the overall effect of the rubber material is reduced. Therefore, the raw material components in the rubber material composition of the present application play a good role in low temperature resistance as a whole, and can allow the hose to maintain rubber elasticity in a low temperature environment, prevent leakage from the joints, and thus achieve the function of transporting liquid carbon dioxide.

[0011] In some embodiments, the composition is composed of the following raw materials, by weight: 50-70 parts of chlorinated butyl rubber, 30-50 parts of butadiene rubber, 1-1.5 parts of stearic acid, 4-6 parts of activator, 8-10 parts of reinforcing resin, 3-4 parts of antioxidant, 3-4 parts of adhesive, 80-90 parts of carbon black, 10-12 parts of low-temperature plasticizer, 3-4 parts of stabilizer, 2-3 parts of main vulcanizing agent, 0.5-1.0 part of co-vulcanizing agent and 0.5-1.0 part of accelerator.

[0012] In some embodiments, the molecular weight of the butadiene rubber is 250,000 to 400,000;

[0013] Or, the low-temperature plasticizer is at least one of dioctyl sebacate and dioctyl adipate;

[0014] Or, the active agent is one of nano zinc oxide and active zinc oxide, and the particle size of the active agent is 10-100 nm;

[0015] Or, the reinforcing resin is at least one of C5 petroleum resin and PN110;

[0016] Or, the antioxidant is at least one of antioxidant RD and antioxidant 4010NA;

[0017] Or, the adhesive is at least one of adhesive AS-88 and adhesive RC;

[0018] Or, the carbon black is at least one of carbon black N990 and carbon black N774, and the particle size of the carbon black is 200-400 nm; or, the stabilizer is at least one of stabilizer SH286 and stabilizer FH-1;

[0019] Or, the main vulcanizing agent is insoluble sulfur;

[0020] Or, the vulcanizing agent is at least one of DTDM and DCP;

[0021] Alternatively, the accelerator is at least one of accelerator CZ and accelerator TMTD.

[0022] In some embodiments, the carbon black includes 40 parts of carbon black N990 and 50 parts of carbon black N774 by weight;

[0023] Or, the accelerator includes 0.6 parts of accelerator TMTD and 0.4 parts of accelerator CZ;

[0024] Or, the antioxidant includes 1.5 parts of antioxidant RD and 2 parts of antioxidant 4010NA.

[0025] In a second aspect, the present invention provides a method for preparing the low-temperature resistant and gas permeation resistant rubber material according to the first aspect, comprising the following steps:

[0026] (1) mixing chlorinated butyl rubber and butadiene rubber under pressure to obtain a first mixed material;

[0027] (2) adding stearic acid, an active agent, a reinforcing resin, an antioxidant and a binder to the first mixed material, and then mixing under pressure to obtain a second mixed material;

[0028] (3) dividing the carbon black into a plurality of portions, taking a portion of the carbon black and adding it to the second mixed material and mixing under pressure to obtain a third mixed material;

[0029] (4) adding the low-temperature plasticizer and the remaining carbon black to the third mixed material and mixing them under pressure to obtain a mixed material;

[0030] (5) After the mixed material is debonded, filtering is performed to obtain a first rubber material;

[0031] (6) pouring the first rubber compound and mixing it under pressure to obtain a second rubber compound;

[0032] (7) Add the main vulcanizing agent, auxiliary vulcanizing agent and accelerator to the second rubber material and mix under pressure.

[0033] After the glue is poured, the rubber material which is resistant to low temperature and gas penetration is obtained.

[0034] In some embodiments, the temperature of the pressurized mixing is 120-150° C. and the pressure is 0.6-0.8 MPa.

[0035] In some embodiments, in step (1), the time of pressurized mixing is 2-5 minutes;

[0036] Or, the time of pressurized mixing in step (2), step (3) and step (4) is 2-3 minutes;

[0037] Alternatively, in step (6) and step (7), the time of pressurized mixing is 1-1.5 minutes, and the number of times of pouring the glue is 3-5 times.

[0038] In a third aspect, the present invention provides use of the low-temperature resistant and gas-permeability-resistant rubber material described in the first aspect in the preparation of a liquid carbon dioxide rubber hose.

[0039] In the fourth third aspect, the present invention provides a liquid carbon dioxide rubber hose, comprising an inner rubber layer, an anti-permeation layer, a reinforcing layer and an outer rubber layer arranged in sequence, the inner rubber layer and the outer rubber layer are made of the low-temperature resistant and gas-permeation-proof rubber material described in the first aspect; the anti-permeation layer is arranged between the inner rubber layer and the reinforcing layer.

[0040] In some embodiments, the anti-permeation layer is a UHMWPE anti-permeation layer with a thickness of 1.5 to 3 mm.

[0041] Beneficial effects of the present invention:

[0042] (1) The present invention adopts chlorinated butyl rubber and cis-1,4-butadiene rubber as the main rubber. The gas permeability of chlorinated butyl rubber is extremely low, which is only 1 / 9 of that of styrene-butadiene rubber. Therefore, using chlorinated butyl rubber as the main material of the inner rubber layer can effectively prevent carbon dioxide from penetrating out. Cis-1,4-butadiene rubber has an extremely low glass transition temperature of -110°C and has good elasticity even at low temperatures. The use of chlorinated butyl rubber and cis-1,4-butadiene rubber can ensure the low gas permeability of the rubber and allow the rubber to have excellent low-temperature resistance. Therefore, when transporting liquid carbon dioxide, carbon dioxide can be prevented from penetrating out and excessive pressure drop can be prevented during the transportation process. The good low-temperature resistance can also allow the hose to maintain rubber elasticity in a low-temperature environment and prevent leakage from the joints.

[0043] (2) The present invention selects chlorinated butyl rubber with good air tightness and butadiene rubber with excellent low-temperature resistance as the main rubber species, adds a certain amount of carbon black to improve the air tightness of the rubber, and adds a low-temperature plasticizer to improve the low-temperature resistance of the rubber. In this way, not only can the prepared anti-permeation rubber have good air tightness, but also the rubber has excellent low-temperature resistance, thereby allowing the liquid carbon dioxide delivery hose to have better safety performance.

[0044] (3) In the preparation method of the low-temperature resistant and gas-permeable rubber material of the present invention, the rubber filtering process can filter out impurities in the master mix and refine the mix again to improve the quality of the rubber material; repeated pouring of the rubber can help to better disperse the vulcanizer in the rubber material, making the performance of the rubber material more stable.

[0045] (4) The low-temperature resistant and gas-permeable rubber material of the present invention has good permeability and low-temperature resistance properties. The rubber formula has a strong bonding force with the skeleton material to ensure a stable bonding effect. A 1.5-3 mm thick UHMWPE permeability-proof layer is added between the inner rubber layer and the reinforcement layer. The inner rubber and plastic permeability-proof layers provide double protection, which can minimize carbon dioxide permeation and pressure drop, thereby protecting the environment and saving costs. DETAILED DESCRIPTION

[0046] In order to more clearly and in detail introduce the low temperature resistant and anti-permeation rubber material provided by the embodiment of the present invention, the following will be described in conjunction with specific embodiments. Unless otherwise specified, all raw materials used in the embodiments of the present invention are commercially available products. The temperature of the pressurized mixing in all embodiments is 130°C and the pressure is 0.7Mpa.

[0047] Example 1

[0048] 80 parts by weight of chlorinated butyl rubber and 20 parts by weight of blocky butadiene rubber (molecular weight 300,000) were put into an internal mixer and mixed under pressure for 2-3 minutes; then 1.2 parts by weight of stearic acid, 5.0 parts by weight of nano zinc oxide, 8 parts by weight of C5 petroleum resin, 1.8 parts by weight of antioxidant RD, 2.0 parts by weight of antioxidant 4010NA, 3.0 parts by weight of adhesive AS-88, and 3.0 parts by weight of stabilizer FH-1 were added to the internal mixer and mixed under pressure for 1-1.5 minutes; then half of the amount of carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774), and pressurized mixing for 2-3 minutes; then, 10 parts by weight of DOS and the other half of the carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774) were added to the internal mixer, and pressurized mixing was performed for 2-3 minutes; after the mixing was completed, the rubber was discharged, the mixed rubber material was filtered through a rubber filter and added to an open mixer, the roller of the open mixer was adjusted to 3.0-3.5 mm, the rubber was poured 3-4 times on the rubber roll and the sheet was parked for 24 hours, and then the sheet was put into the internal mixer and pressurized mixing was performed for 1 minute, and then 2.2 parts of insoluble sulfur, 0.8 parts of vulcanizing agent DTDM, 0.6 parts of accelerator TMTD, and 0.4 parts of accelerator CZ were added, and the rubber was discharged after pressurized mixing for 1 minute, and the rubber was poured 4 times on the open mixer to obtain a cold-resistant and anti-penetration rubber material 1.

[0049] Example 2

[0050] 70 parts by weight of chlorinated butyl rubber and 30 parts by weight of blocky butadiene rubber (molecular weight 300,000) were put into an internal mixer and mixed under pressure for 2-3 minutes; then 1.2 parts by weight of stearic acid, 5.0 parts by weight of nano zinc oxide, 8 parts by weight of C5 petroleum resin, 1.8 parts by weight of antioxidant RD, 2.0 parts by weight of antioxidant 4010NA, 3.0 parts by weight of adhesive AS-88, and 3.0 parts by weight of stabilizer FH-1 were added to the internal mixer and mixed under pressure for 1-1.5 minutes; then half of the amount of carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774), and pressurized mixing for 2-3 minutes; then, 10 parts by weight of DOS and the other half of the carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774) were added to the internal mixer, and pressurized mixing was performed for 2-3 minutes; after the mixing was completed, the rubber was discharged, and the mixed rubber material was filtered through a rubber filter and added to an open mixer, the roller of the open mixer was adjusted to 3.0-3.5 mm, and the rubber roller was turned over 3-4 times to dissipate the rubber and parked for 24 hours, and then put into the internal mixer and pressurized mixing for 1 minute, and then 2.2 parts of insoluble sulfur, 0.8 parts of vulcanizing agent DTDM, 0.6 parts of accelerator TMTD, and 0.4 parts of accelerator CZ were added, and the rubber was discharged after pressurized mixing for 1 minute, and the rubber was turned over 4 times on the open mixer to obtain a cold-resistant and anti-penetration rubber material 2.

[0051] Example 3

[0052] 60 parts by weight of chlorinated butyl rubber and 40 parts by weight of blocky butadiene rubber (molecular weight 300,000) were put into an internal mixer and mixed under pressure for 2-3 minutes; then 1.2 parts by weight of stearic acid, 5.0 parts by weight of nano zinc oxide, 8 parts by weight of C5 petroleum resin, 1.8 parts by weight of antioxidant RD, 2.0 parts by weight of antioxidant 4010NA, 3.0 parts by weight of adhesive AS-88, and 3.0 parts by weight of stabilizer FH-1 were added to the internal mixer and mixed under pressure for 1-1.5 minutes; then half of the amount of carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774), and pressurized mixing for 2-3 minutes; then, 10 parts by weight of DOS and the other half of the carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774) were added to the internal mixer, and pressurized mixing was performed for 2-3 minutes; after the mixing was completed, the rubber was discharged, and the mixed rubber material was filtered through a rubber filter and added to an open mixer, the roller of the open mixer was adjusted to 3.0-3.5 mm, and the rubber was poured 3-4 times with the rubber roll and the sheet was parked for 24 hours, and then put into the internal mixer and pressurized mixing for 1 minute, and then 2.2 parts of insoluble sulfur, 0.8 parts of vulcanizing agent DTDM, 0.6 parts of accelerator TMTD, and 0.4 parts of accelerator CZ were added, and the rubber was discharged after pressurized mixing for 1 minute, and the rubber was poured 4 times on the open mixer to obtain a cold-resistant and anti-penetration rubber material 3.

[0053] Example 4

[0054] 50 parts by weight of chlorinated butyl rubber and 50 parts by weight of blocky butadiene rubber (molecular weight 300,000) were put into an internal mixer and mixed under pressure for 2-3 minutes; then 1.2 parts by weight of stearic acid, 5.0 parts by weight of nano zinc oxide, 8 parts by weight of C5 petroleum resin, 1.8 parts by weight of antioxidant RD, 2.0 parts by weight of antioxidant 4010NA, 3.0 parts by weight of adhesive AS-88, and 3.0 parts by weight of stabilizer FH-1 were added to the internal mixer and mixed under pressure for 1-1.5 minutes; then half of the amount of carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774), and pressurized mixing for 2-3 minutes; then, 10 parts by weight of DOS and the other half of the carbon black (20 parts by weight of carbon black N990 and 25 parts by weight of carbon black N774) were added to the internal mixer, and pressurized mixing was performed for 2-3 minutes; after the mixing was completed, the rubber was discharged, and the mixed rubber material was filtered through a rubber filter and added to an open mixer, the roller of the open mixer was adjusted to 3.0-3.5 mm, and the rubber roller was turned over 3-4 times and the sheet was parked for 24 hours, and then put into the internal mixer and pressurized mixing for 1 minute, and then 2.2 parts of insoluble sulfur, 0.8 parts of vulcanizing agent DTDM, 0.6 parts of accelerator TMTD, and 0.4 parts of accelerator CZ were added, and the rubber was discharged after pressurized mixing for 1 minute, and the rubber was turned over 4 times on the open mixer to obtain cold-resistant and anti-penetration rubber material 4.

[0055] Comparative Example 1

[0056] The difference from Example 3 is that natural rubber is used to replace chlorinated butyl rubber, and the other preparation processes are exactly the same as those of Example 3.

[0057] Comparative Example 2

[0058] The difference from Example 3 is that the proportion of chlorinated butyl rubber is adjusted to 50 parts, 10 parts of natural rubber are added and mixed with 40 parts by weight of block-shaped butadiene rubber. The other preparation processes are exactly the same as those in Example 3.

[0059] Comparative Example 3

[0060] The difference from Example 3 is that no chlorinated butyl rubber is added, and 100 parts of butadiene rubber are directly added and pressurized and mixed. The other preparation processes are exactly the same as those of Example 3.

[0061] Comparative Example 4

[0062] The difference from Example 3 is that no butadiene rubber is added, and 100 parts of chlorobutyl rubber are directly added and pressurized and mixed. The other preparation processes are exactly the same as those of Example 3.

[0063] Comparative Example 5

[0064] The difference from Example 3 is that the low-temperature plasticizer DOS is not added, and the other preparation processes are exactly the same as those of Example 3.

[0065] Comparative Example 6

[0066] The difference from Example 3 is that the carbon black is directly added into the mixing at one time, and the other preparation processes are exactly the same as those in Example 3.

[0067] Performance Testing

[0068] The properties of the materials in the embodiments and comparative examples are shown in Table 1. Specific test methods:

[0069] The gas permeability test method adopts GB / T7755-2003, and the test is performed using a professional gas permeability test instrument. The test result unit is m 2 / Pa.s.

[0070] The low temperature performance test method adopts GB / T1682-2014, and is tested using a low temperature brittleness testing machine. The test result unit is ℃.

[0071] The wear resistance test method adopts GB / T12721-2007, using an outer cover wear resistance testing machine for testing, applying a force of (50±5)N, 2000 cycles, the standard is loss of mass ≤1g, and the test result unit is g.

[0072] Table 1 Material properties

[0073] serial number <![CDATA[Air permeability (m 2 / Pa.s)]]> Low temperature performance(℃) Wear resistance(g) Example 1 0.42 -66 0.27 Example 2 0.79 -72 0.22 Example 3 1.15 -78 0.19 Example 4 1.79 -82 0.15 Comparative Example 1 2.42 -75 0.13 Comparative Example 2 1.37 -78 0.20 Comparative Example 3 2.59 -95 0.07 Comparative Example 4 0.27 -60 0.35 Comparative Example 5 1.15 -70 0.18 Comparative Example 6 1.29 -75 0.21

[0074] Since carbon dioxide will remain in a liquid state at a temperature between -56.4°C and -78°C. From the test results in Table 1, it can be seen that the low-temperature resistant and anti-permeation rubber materials in Examples 3 and 4 can meet the low-temperature performance requirements for transporting liquid carbon dioxide while minimizing the air permeability of the rubber materials, allowing the liquid carbon dioxide rubber hose to be safely transported at low temperatures, thereby increasing the service life of the rubber hose, and also reducing the penetration of carbon dioxide into the environment, thereby reducing environmental pollution. Although the air permeability of Examples 1 and 2 is lower than that of Examples 3 and 4, the low-temperature performance is slightly worse, and they will crack prematurely during the transportation of liquid carbon dioxide, resulting in a reduced service life of the hose.

[0075] It can be seen from Comparative Examples 1-6 that chlorinated butyl rubber has good gas permeability resistance and low gas permeability. As the proportion of chlorinated butyl rubber increases, the permeability of the rubber decreases, but the low temperature and wear resistance deteriorate; cis-1,4-butadiene rubber has good low temperature resistance and wear resistance, but high gas permeability. As the proportion of cis-1,4-butadiene rubber increases, the low temperature performance and wear resistance of the rubber improve, but the gas permeability increases. Therefore, the use of Example 3 or 4 can ensure that the gas permeability of the rubber is within a smaller range and the low temperature performance and wear resistance of the rubber are guaranteed.

[0076] Therefore, the present invention provides a low-temperature anti-permeation rubber material. Compared with the prior art, the anti-permeation rubber material provided by the present invention uses chlorinated butyl rubber with good air tightness and butadiene rubber with excellent low-temperature resistance as the main rubber species, adds a certain amount of carbon black to improve the air tightness of the rubber material, and adds a low-temperature plasticizer to improve the low-temperature resistance of the rubber material. In this way, not only can the prepared anti-permeation rubber material have good air tightness, but also the rubber material has excellent low-temperature resistance, thereby allowing the liquid carbon dioxide delivery hose to have better safety performance.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low temperature resistant and gas permeation resistant rubber material, characterized in that: The composition is composed of the following raw materials by weight: 50-80 parts of chlorinated butyl rubber, 20-50 parts of butadiene rubber, 1-2 parts of stearic acid, 4-7 parts of activator, 5-10 parts of reinforcing resin, 2-4 parts of antioxidant, 3-5 parts of adhesive, 60-90 parts of carbon black, 10-15 parts of low-temperature plasticizer, 2-4 parts of stabilizer, 2-4 parts of main vulcanizing agent, 0.5-1.5 parts of co-vulcanizing agent and 0.5-1.5 parts of accelerator.

2. The low temperature resistant and gas permeation resistant rubber material according to claim 1, characterized in that: The composition is composed of the following raw materials by weight: 50-70 parts of chlorinated butyl rubber, 30-50 parts of butadiene rubber, 1-1.5 parts of stearic acid, 4-6 parts of activator, 8-10 parts of reinforcing resin, 3-4 parts of antioxidant, 3-4 parts of adhesive, 80-90 parts of carbon black, 10-12 parts of low-temperature plasticizer, 3-4 parts of stabilizer, 2-3 parts of main vulcanizing agent, 0.5-1.0 part of co-vulcanizing agent and 0.5-1.0 part of accelerator.

3. The low temperature resistant and gas permeation resistant rubber material according to claim 1, characterized in that: The molecular weight of the butadiene rubber is 250,000 to 400,000; Or, the low-temperature plasticizer is at least one of dioctyl sebacate and dioctyl adipate; Or, the active agent is one of nano zinc oxide and nano magnesium oxide, and the particle size of the active agent is 10-100 nm; Or, the reinforcing resin is at least one of C5 petroleum resin and PN110; Or, the antioxidant is at least one of antioxidant RD and antioxidant 4010NA; Or, the adhesive is at least one of adhesive AS-88 and adhesive RC; Or, the carbon black is at least one of carbon black N990 and carbon black N774, and the particle size of the carbon black is 200 to 400 nm; Or, the stabilizer is at least one of stabilizer SH286 and stabilizer FH-1; Or, the main vulcanizing agent is insoluble sulfur; Or, the vulcanizing agent is at least one of DTDM and DCP; Alternatively, the accelerator is at least one of accelerator CZ and accelerator TMTD.

4. The low temperature resistant and gas permeation resistant rubber material according to claim 3, characterized in that: In parts by weight, the carbon black includes 40 parts of carbon black N990 and 50 parts of carbon black N774; Or, the accelerator includes 0.6 parts of accelerator TMTD and 0.4 parts of accelerator CZ; Or, the antioxidant includes 1.5 parts of antioxidant RD and 2 parts of antioxidant 4010NA.

5. A method for preparing the low-temperature resistant and gas-permeable rubber material according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) mixing chlorinated butyl rubber and butadiene rubber under pressure to obtain a first mixed material; (2) adding stearic acid, an active agent, a reinforcing resin, an antioxidant and a binder to the first mixed material, and then mixing under pressure to obtain a second mixed material; (3) dividing the carbon black into a plurality of portions, taking a portion of the carbon black and adding it to the second mixed material and mixing under pressure to obtain a third mixed material; (4) adding the low-temperature plasticizer and the remaining carbon black to the third mixed material and mixing them under pressure to obtain a mixed material; (5) After the mixed material is debonded, filtering is performed to obtain a first rubber material; (6) pouring the first rubber compound and mixing it under pressure to obtain a second rubber compound; (7) The main vulcanizing agent, the auxiliary vulcanizing agent and the accelerator are added to the second rubber material and mixed under pressure. After the rubber is discharged and poured, the low-temperature resistant and gas-permeable rubber material is obtained.

6. The method for preparing the low-temperature resistant and gas-impermeable rubber material according to claim 5, characterized in that: The temperature of the pressurized mixing is 120-150°C and the pressure is 0.6-0.8Mpa.

7. The method for preparing the low-temperature resistant and gas-permeable rubber material according to claim 5, characterized in that: In step (1), the time of pressurized mixing is 2-5 minutes; Or, the time of pressurized mixing in step (2), step (3) and step (4) is 2-3 minutes; Alternatively, in step (6) and step (7), the time of pressurized mixing is 1-1.5 minutes, and the number of times of pouring the glue is 3-5 times.

8. Use of the low-temperature resistant and gas-permeation-proof rubber material according to any one of claims 1 to 4 in the preparation of a liquid carbon dioxide rubber hose.

9. A liquid carbon dioxide rubber hose, characterized in that: It comprises an inner rubber layer, an anti-permeation layer, a reinforcing layer and an outer rubber layer arranged in sequence, wherein the inner rubber layer, the reinforcing layer and the outer rubber layer are made of the low-temperature resistant and gas-permeable rubber material according to any one of claims 1 to 4; the anti-permeation layer is arranged between the inner rubber layer and the reinforcing layer.

10. The liquid carbon dioxide rubber hose according to claim 9, characterized in that: The anti-permeation layer is a UHMWPE anti-permeation layer with a thickness of 1.5 to 3 mm.