Weather-resistant and fire-resistant concrete rubber for sealing structure

Abstract

The invention discloses weather-resistant and fire-resistant coagulation rubber for a sealing structure, and relates to the field of rubber, the weather-resistant and fire-resistant coagulation rubber comprises the following raw materials by weight: 35-40 parts of ethylene propylene diene monomer, 25-30 parts of silicone rubber, 15-20 parts of fluororubber, 3-5 parts of an aerogel thermal insulation material, 1-2 parts of an antioxidant, 1-2 parts of a weather-resistant agent, and 0.8-1 part of a fire-resistant thermal insulation filler. By mixing the ethylene propylene diene monomer, the silicone rubber and the fluororubber and reasonably proportioning the aerogel heat-insulating material, the antioxidant, the weather-resistant agent and the fire-resistant heat-insulating filler, the weather resistance of the coagulated rubber can be improved by 30-50%, the heat resistance can be improved by 30-60%, the service life of a rubber product is prolonged, and the service life of the rubber product is prolonged. Meanwhile, the anti-ultraviolet agent is added in the modification process of the silicone rubber, so that the weather resistance of the rubber can be further improved, and aging caused by oxidation and ultraviolet irradiation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rubber, and is a weather-resistant and fire-resistant concrete rubber used for sealing structures. Background Art

[0002] The sealing structural material used for the high-voltage busbar penetration holes in the power industry is in a compressed state for a long time and in a high temperature and high humidity environment. The weather resistance of the material is poor, the material ages quickly under stress, and the cost of maintenance and replacement after installation is high. Concrete rubber is required to improve the weather resistance, fire resistance and anti-aging properties of the material and extend the service life of the material. To this end, we provide a weather-resistant and fire-resistant concrete rubber for sealing structures to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to make up for the deficiencies of the prior art and to provide a weather-resistant and fire-resistant concrete rubber for a sealing structure, which solves the problems of poor weather resistance and rapid aging of existing rubber materials.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a weather-resistant and fire-resistant concrete rubber for sealing structure, wherein the raw materials thereof include, by weight: 35-40 parts of EPDM rubber, 25-30 parts of silicone rubber, 15-20 parts of fluororubber, 3-5 parts of aerogel insulation material, 1-2 parts of antioxidant, 1-2 parts of weather-resistant agent, and 0.8-1 part of fire-resistant and heat-insulating filler;

[0005] The silicone rubber is modified silicone rubber, and the silicone rubber and a functional polymer are prepared by either a blending method or a crosslinking method to prepare the modified silicone rubber, and the functional polymer is either a polyester or a polyether, and an anti-ultraviolet agent is added during the silicone rubber modification process.

[0006] Furthermore, the EPDM rubber is a modified EPDM rubber, which is prepared by a cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, and the vulcanizing agent is any one of benzoyl peroxide BPO or diisopropylbenzene peroxide DCP, and the cross-linking agent is any one of carbon disulfide, lead trisulfide or salicylaldehyde.

[0007] Furthermore, the aerogel thermal insulation material is any one of aluminum silicate aerogel, carbon aerogel or polyurethane aerogel.

[0008] Furthermore, the antioxidant is any one of triphenyl phosphate, 2,6-di-tert-butyl-4-methylphenol, dibenzoyl peroxide or 1,3-dimethylbutyl.

[0009] Furthermore, the weathering agent is any one of a UV absorber, an amino resin, a melamine-modified synthetic resin or a light stabilizer.

[0010] Furthermore, the refractory heat-insulating filler is any one of expanded graphite, silicon nitride, aluminosilicate minerals, kaolin or ceramic fiber filler.

[0011] Furthermore, the method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0012] Step A: In an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 5 to 10 minutes;

[0013] Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 to 8 minutes;

[0014] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 to 5 minutes;

[0015] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a coagulated rubber.

[0016] Furthermore, the mixing temperature is 160° C. to 180° C., the vulcanization temperature is 150° C. to 190° C., the vulcanization time is 20 to 40 minutes, and the vulcanization pressure is 10 to 20 MPa.

[0017] Furthermore, in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0018] Compared with the prior art, the weather-resistant and fire-resistant concrete rubber used for sealing structure has the following beneficial effects:

[0019] 1. The present invention adopts the mixing of EPDM rubber, modified silicone rubber and fluororubber, and adds a reasonable ratio of aerogel insulation material, antioxidant, weathering agent and fire-resistant insulation filler, so as to improve the weather resistance of the mixed rubber by about 30% to 50%, and the heat resistance by 30% to 60%, thereby extending the service life of the rubber product and improving its performance in various harsh environments. At the same time, the anti-ultraviolet agent added to the silicone rubber during the modification process can further improve the weather resistance of the rubber and reduce the aging caused by oxidation and ultraviolet radiation.

[0020] 2. The present invention adds EPDM rubber, silicone rubber and fluororubber twice in succession during the mixing process. Adding the raw materials in stages can not only better control the viscosity change during mixing and avoid mixing difficulties caused by excessive viscosity, but also enable sufficient interaction between the components and reduce agglomeration between any raw materials, which helps the fillers and additives added later to be better compatible with the substrate, thereby improving the physical properties and chemical stability of the final product.

[0021] 3. The modified silicone rubber of the present invention can not only withstand higher temperatures and maintain a lower thermal expansion rate, but also better resist oxidation, further extending the service life of the material. At the same time, the modified silicone rubber will have better tear strength, wear resistance and flexibility through the modified polymer blend, so that the modified silicone rubber has better fatigue performance.

[0022] Other advantages, objectives and features of the present invention will be set forth in part in the following description and, in part, will be apparent to those skilled in the art based on an examination of the following or may be taught from the practice of the present invention. Implementation

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The invention provides a technical solution: a weather-resistant and fire-resistant concrete rubber for sealing structures, wherein the raw materials thereof include, by weight, 35-40 parts of EPDM rubber, 25-30 parts of silicone rubber, 15-20 parts of fluororubber, 3-5 parts of aerogel thermal insulation materials, 1-2 parts of antioxidants, 1-2 parts of weather-resistant agents, and 0.8-1 parts of fire-resistant and heat-insulating fillers; the invention adopts the mixing of EPDM rubber, silicone rubber, and fluororubber, and adds a reasonable proportion of aerogel thermal insulation materials, antioxidants, weather-resistant agents, and fire-resistant and heat-insulating fillers, so that the weather resistance of the concrete rubber can be improved by about 30% to 50%, and the heat resistance can be improved by 30% to 60%, thereby extending the service life of the rubber product and improving its performance in various harsh environments; at the same time, the anti-ultraviolet agent added to the silicone rubber during the modification process can further improve the weather resistance of the rubber and reduce aging caused by oxidation and ultraviolet radiation.

[0026] The silicone rubber is modified silicone rubber, and the silicone rubber and a functional polymer are prepared by either a blending method or a crosslinking method to prepare the modified silicone rubber, and the functional polymer is either a polyester or a polyether, and an anti-ultraviolet agent is added during the silicone rubber modification process; the modified silicone rubber of the present invention can not only withstand higher temperatures and maintain a lower thermal expansion rate, but also better resist oxidation, further extending the service life of the material, and at the same time, the modified silicone rubber will have better tear strength, wear resistance and flexibility through the modified polymer blend, so that the modified silicone rubber has better fatigue performance.

[0027] The EPDM rubber is a modified EPDM rubber, which is prepared by a cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, and the vulcanizing agent is any one of benzoyl peroxide BPO or dicumyl peroxide DCP, and the cross-linking agent is any one of carbon disulfide, lead trisulfide or salicylaldehyde.

[0028] The aerogel thermal insulation material is any one of aluminum silicate aerogel, carbon aerogel or polyurethane aerogel; the antioxidant is any one of triphenyl phosphate, 2,6-di-tert-butyl-4-methylphenol, dibenzoyl peroxide or 1,3-dimethylbutyl; the weathering agent is any one of UV absorber, amino resin, melamine modified synthetic resin or light stabilizer; the refractory thermal insulation filler is any one of expanded graphite, silicon nitride, aluminum silicate mineral, kaolin or ceramic fiber filler.

[0029] The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0030] Step A, in an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 5 to 10 minutes, the mixing temperature being 160° C. to 180° C.;

[0031] Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 to 8 minutes;

[0032] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 to 5 minutes;

[0033] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a concrete rubber; the vulcanization temperature is 150° C. to 190° C., the vulcanization time is 20 to 40 minutes, and the vulcanization pressure is 10 to 20 MPa; in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0034] The present invention adds EPDM rubber, silicone rubber and fluororubber twice in succession during the mixing process. The raw materials are added in stages, which can not only better control the viscosity change during mixing and avoid mixing difficulties caused by excessively high viscosity, but also enable the components to fully interact with each other and reduce the agglomeration phenomenon between any raw materials, which helps the fillers and additives added later to be better compatible with the substrate, thereby improving the physical properties and chemical stability of the final product.

[0035] Example 1

[0036] A weather-resistant and fire-resistant concrete rubber for sealing structures, whose raw materials include, by weight: 35 parts of EPDM rubber, 25 parts of silicone rubber, 15 parts of fluororubber, 3 parts of aerogel insulation material, 1 part of antioxidant, 1 part of weather-resistant agent, and 0.8 part of fire-resistant and heat-insulating filler.

[0037] The silicone rubber is modified silicone rubber, which is prepared by blending the silicone rubber with a functional polymer, and the functional polymer is polyester. An anti-ultraviolet agent is added during the silicone rubber modification process; the aerogel thermal insulation material is aluminum silicate aerogel; the antioxidant is triphenyl phosphate; the weathering agent is a UV absorber; and the fire-resistant thermal insulation filler is expanded graphite.

[0038] The EPDM rubber is a modified EPDM rubber, which is prepared by cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, and the vulcanizing agent is benzoyl peroxide BPO or, and the cross-linking agent is carbon disulfide.

[0039] The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0040] Step A, in an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 8 minutes, the mixing temperature being 165° C.;

[0041] Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 minutes;

[0042] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 minutes;

[0043] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a concrete rubber; the vulcanization temperature is 150° C., the vulcanization time is 25 min, and the vulcanization pressure is 10 MPa; in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0044] Example 2

[0045] A weather-resistant and fire-resistant concrete rubber for sealing structures, whose raw materials include, by weight: 38 parts of EPDM rubber, 29 parts of silicone rubber, 18 parts of fluororubber, 3 parts of aerogel insulation material, 1 part of antioxidant, 1 part of weather-resistant agent, and 0.8 part of fire-resistant and heat-insulating filler.

[0046] The silicone rubber is modified silicone rubber, which is prepared by blending the silicone rubber with a functional polymer, and the functional polymer is polyester. An anti-ultraviolet agent is added during the silicone rubber modification process; the aerogel thermal insulation material is aluminum silicate aerogel; the antioxidant is triphenyl phosphate; the weathering agent is a UV absorber; and the fire-resistant thermal insulation filler is expanded graphite.

[0047] The EPDM rubber is a modified EPDM rubber, which is prepared by cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, and the vulcanizing agent is benzoyl peroxide BPO or, and the cross-linking agent is carbon disulfide.

[0048] The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0049] Step A, in an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 8 minutes, the mixing temperature being 165° C.;

[0050] Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 minutes;

[0051] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 minutes;

[0052] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a concrete rubber; the vulcanization temperature is 150° C., the vulcanization time is 25 min, and the vulcanization pressure is 10 MPa; in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0053] Example 3

[0054] A weather-resistant and fire-resistant concrete rubber for sealing structures, whose raw materials include, by weight: 40 parts of EPDM rubber, 30 parts of silicone rubber, 20 parts of fluororubber, 5 parts of aerogel insulation material, 2 parts of antioxidant, 2 parts of weather-resistant agent, and 1 part of fire-resistant and heat-insulating filler.

[0055] The silicone rubber is modified silicone rubber, which is prepared by blending the silicone rubber with a functional polymer, and the functional polymer is polyester. An anti-ultraviolet agent is added during the silicone rubber modification process; the aerogel thermal insulation material is aluminum silicate aerogel; the antioxidant is triphenyl phosphate; the weathering agent is a UV absorber; and the fire-resistant thermal insulation filler is expanded graphite.

[0056] The EPDM rubber is a modified EPDM rubber, which is prepared by cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, wherein the vulcanizing agent is benzoyl peroxide BPO, and the cross-linking agent is carbon disulfide.

[0057] The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0058] Step A, in an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 8 minutes, the mixing temperature being 165° C.;

[0059] Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 minutes;

[0060] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 minutes;

[0061] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a concrete rubber; the vulcanization temperature is 150° C., the vulcanization time is 25 min, and the vulcanization pressure is 10 MPa; in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0062] Comparative Example 1

[0063] A weather-resistant and fire-resistant concrete rubber for sealing structures, whose raw materials include, by weight: 40 parts of EPDM rubber, 30 parts of silicone rubber, 20 parts of fluororubber, 5 parts of aerogel insulation material, 2 parts of antioxidant, 2 parts of weather-resistant agent, and 1 part of fire-resistant and heat-insulating filler.

[0064] The silicone rubber is modified silicone rubber, which is prepared by cross-linking the silicone rubber and a functional polymer, and the functional polymer is a polyether. An anti-ultraviolet agent is added during the silicone rubber modification process; the aerogel thermal insulation material is carbon aerogel; the antioxidant is 2,6-di-tert-butyl-4-methylphenol; the weathering agent is an amino resin; and the fire-resistant thermal insulation filler is silicon nitride.

[0065] The EPDM rubber is a modified EPDM rubber, which is prepared by cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, wherein the vulcanizing agent is benzoyl peroxide BPO, and the cross-linking agent is carbon disulfide.

[0066] The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0067] Step A, in an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 8 minutes, the mixing temperature being 165° C.;

[0068] Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 minutes;

[0069] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 minutes;

[0070] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a concrete rubber; the vulcanization temperature is 150° C., the vulcanization time is 25 min, and the vulcanization pressure is 10 MPa; in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0071] Comparative Example 2

[0072] A weather-resistant and fire-resistant concrete rubber for sealing structures, whose raw materials include, by weight: 40 parts of EPDM rubber, 30 parts of silicone rubber, 20 parts of fluororubber, 5 parts of aerogel insulation material, 2 parts of antioxidant, 2 parts of weather-resistant agent, and 1 part of fire-resistant and heat-insulating filler.

[0073] The silicone rubber is modified silicone rubber, which is prepared by cross-linking the silicone rubber and a functional polymer, and the functional polymer is a polyether. An anti-ultraviolet agent is added during the silicone rubber modification process; the aerogel thermal insulation material is carbon aerogel; the antioxidant is 2,6-di-tert-butyl-4-methylphenol; the weathering agent is an amino resin; and the fire-resistant thermal insulation filler is silicon nitride.

[0074] The EPDM rubber is a modified EPDM rubber, which is prepared by a cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, wherein the vulcanizing agent is dicumyl peroxide DCP, and the cross-linking agent is dilead trisulfide.

[0075] The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps:

[0076] Step A, in an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 10 minutes, the mixing temperature being 180° C.;

[0077] Step B, adding the remaining one third of EPDM rubber, silicone rubber and fluororubber and mixing for 8 minutes;

[0078] Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 to 5 minutes;

[0079] Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a concrete rubber; the vulcanization temperature is 190° C., the vulcanization time is 40 min, and the vulcanization pressure is 20 MPa; in step D, a fire-resistant coating is applied on the surface of the concrete rubber.

[0080] The performance of the concrete rubber prepared in the above-mentioned Examples 1 to 3 and Comparative Examples 1 to 2 was tested. The tensile strength and elongation at break were tested according to the standard of GB / T528-2009, the oxygen index test standard was GB / T2406-2009, the weather resistance test standard was GB / T16422.1, and the fire resistance test standard was GB / T2408. The test results are shown in Table 1.

[0081] Table 1: Performance test data table:

[0082]

[0083] From the test results of the above-mentioned embodiments 1 to 3, it can be seen that the concrete rubber prepared by using 40 parts of EPDM rubber, 30 parts of silicone rubber, 20 parts of fluororubber, 5 parts of aerogel insulation material, 2 parts of antioxidant, 2 parts of weathering agent, and 1 part of fire-resistant insulation filler has the best weather resistance and fire resistance, and can achieve an improvement of 30% to 50% in weather resistance of the concrete rubber, and an improvement of 30% to 60% in heat resistance.

[0084] It can be seen from the test results of Example 3 and Comparative Example 1 that when the raw materials are the same in weight, adjusting the composition of the materials leads to a decrease in the overall quality of the prepared concrete rubber.

[0085] It can be seen from the test results of Comparative Examples 1 and 2 above that, when the raw materials are the same in weight and the material composition is the same, the extension of the reaction time will lead to a further decrease in the overall quality of the prepared concrete rubber.

[0086] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A weather-resistant and fire-resistant concrete rubber for sealing structure, characterized in that: The raw materials include, by weight: 35-40 parts of EPDM rubber, 25-30 parts of silicone rubber, 15-20 parts of fluororubber, 3-5 parts of aerogel insulation material, 1-2 parts of antioxidant, 1-2 parts of weathering agent, and 0.8-1 part of fire-resistant insulation filler; The silicone rubber is modified silicone rubber, and the silicone rubber and a functional polymer are prepared by either a blending method or a crosslinking method to prepare the modified silicone rubber, and the functional polymer is either a polyester or a polyether, and an anti-ultraviolet agent is added during the silicone rubber modification process.

2. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 1, characterized in that: The EPDM rubber is a modified EPDM rubber, which is prepared by a cross-linking reaction between the EPDM rubber, a vulcanizing agent and a cross-linking agent, and the vulcanizing agent is any one of benzoyl peroxide BPO or dicumyl peroxide DCP, and the cross-linking agent is any one of carbon disulfide, lead trisulfide or salicylaldehyde.

3. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 1, characterized in that: The aerogel thermal insulation material is any one of aluminum silicate aerogel, carbon aerogel or polyurethane aerogel.

4. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 1, characterized in that: The antioxidant is any one of triphenyl phosphate, 2,6-di-tert-butyl-4-methylphenol, dibenzoyl peroxide or 1,3-dimethylbutyl.

5. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 1, characterized in that: The weathering agent is any one of a UV absorber, an amino resin, a melamine-modified synthetic resin or a light stabilizer.

6. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 1, characterized in that: The refractory heat-insulating filler is any one of expanded graphite, silicon nitride, aluminosilicate minerals, kaolin or ceramic fiber filler.

7. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 1, characterized in that: The method for preparing the weather-resistant and fire-resistant concrete rubber comprises the following steps: Step A: In an internal mixer, preliminarily mix two thirds of the total amount of EPDM rubber, silicone rubber and fluororubber for 5 to 10 minutes; Step B, add the remaining one third of EPDM rubber, silicone rubber and fluororubber and mix for 5 to 8 minutes; Step C, adding aerogel insulation material, refractory insulation filler, antioxidant and weathering agent in sequence, and continuing to mix for 3 to 5 minutes; Step D: After the mixing is completed, molding, vulcanization, cooling, coating and post-treatment are carried out in sequence to obtain a coagulated rubber.

8. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 7, characterized in that: The mixing temperature is 160° C. to 180° C., the vulcanization temperature is 150° C. to 190° C., the vulcanization time is 20 to 40 minutes, and the vulcanization pressure is 10 to 20 MPa.

9. The weather-resistant and fire-resistant concrete rubber for sealing structure according to claim 7, characterized in that: In step D, a fire-resistant coating is applied on the surface of the concrete rubber.

Images