Ultrahigh-toughness resin elastomer as well as preparation method and application thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to an ultrahigh-toughness resin elastomer as well as a preparation method and application thereof. The ultrahigh-toughness resin elastomer is prepared from a polyether polyurethane prepolymer, a plasticizer, an organic silicon defoaming agent, a silane coupling agent, an ultraviolet light absorber, a diamine curing agent, a thixotropic agent, an antioxidant, organic pigment and elastic particles, the elastic particles can increase the surface structure depth of the ultra-high-toughness resin elastomer, the anti-skid performance of the seamless expansion joint is improved, vehicle skid is effectively avoided, meanwhile, the polyether type polyurethane prepolymer can react with functional groups such as amino on the surfaces of the elastic particles to generate ureido bridge bonds, a cross-linked network is formed, and the anti-skid performance of the seamless expansion joint is improved. Compared with the prior art, the compatibility of the elastic particles and polyurethane is remarkably improved, the formation of a uniform stable system is more facilitated, the overall performance of the ultrahigh-toughness resin elastomer is improved, meanwhile, the ultraviolet light absorber and the antioxidant can improve the aging resistance of the ultrahigh-toughness resin elastomer from the outside, and the durability of the material is improved through the internal and external synergistic effect.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and particularly relates to an ultra-high toughness resin elastomer and its preparation method and application. Background Art

[0002] As a crucial structural component in bridge engineering, seamless expansion joints play a key role in ensuring the normal service performance of bridges and driving safety. Its basic principle is to fill the gap of the bridge with a highly elastic expansion material, through which the bridge deck pavement at the expansion joint is tightly connected to other parts as a whole. This design can effectively eliminate the vehicle jumping phenomenon caused by the expansion joint during vehicle driving, and significantly reduce the driving noise. Therefore, it is widely used in the expansion devices of small and medium displacement bridges.

[0003] Currently, the highly elastic expansion materials used for seamless expansion joints can be mainly divided into two categories: asphalt elastomers and resin elastomers. Although asphalt elastomers can meet the basic requirements of expansion joints to a certain extent, they have obvious defects. During actual use, the service life of asphalt elastomers is relatively low. Especially in high-temperature environments, asphalt is prone to softening, resulting in rutting at the expansion joint, affecting the flatness of the bridge and driving comfort; while in low-temperature environments, asphalt becomes brittle and hard, prone to cracking, peeling and other diseases, which not only shortens the service life of the expansion joint, but also increases the maintenance cost and safety risk of the bridge. In contrast, resin elastomers have the characteristics of high tensile strength, strong deformation ability, good toughness, and excellent high and low temperature performance.

[0004] However, the existing resin elastomers have poor anti-slip performance, which is prone to cause vehicle skidding at bridge expansion joints, especially at longitudinal joints, posing a safety hazard; at the same time, the resin elastomers have poor aging resistance, and the deformation fatigue performance is difficult to meet the road use requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide an ultra-high toughness resin elastomer and its preparation method and application, to solve the problems that the existing resin elastomers have poor anti-slip performance, are prone to cause vehicle skidding at bridge expansion joints, especially at longitudinal joints, posing a safety hazard; at the same time, the resin elastomers have poor aging resistance, and the deformation fatigue performance is difficult to meet the road use requirements.

[0006] To achieve the above purpose, the present invention provides an ultra-high toughness resin elastomer, which is composed of component A, component B and component C, and the weight ratio of component A, component B and component C is 100:5 - 15:10 - 25;

[0007] The A component includes the following by weight: 100 parts of polyether-type polyurethane prepolymer, 5 - 10 parts of plasticizer, 0.1 - 0.2 parts of silicone defoamer, 0.5 - 2 parts of silane coupling agent, and 0.5 - 1 part of ultraviolet absorber;

[0008] The B component includes the following by weight: 100 parts of diamine curing agent, 5 - 15 parts of thixotropic agent, 1 - 3 parts of antioxidant, and 0.1 - 0.5 parts of organic pigment;

[0009] The C component is elastic particles, and the elastic particles are activated ethylene propylene diene monomer (EPDM) rubber particles.

[0010] Among them, the size of the activated EPDM rubber particles is 5 - 10 mesh, and the specific activation method of the EPDM rubber particles is as follows:

[0011] Place the EPDM rubber particles successively in a sodium hydroxide solution with a concentration of 5%, a hydrochloric acid solution with a concentration of 5%, and acetone, wash for 30 - 60 minutes respectively, and then wash with distilled water and dry to remove additives and impurities on the surface of the EPDM rubber particles;

[0012] Under the conditions of 50 - 60 °C and a pH value of 3 - 5, completely oxidize the EPDM rubber particles, wash with distilled water and dry;

[0013] Add the oxidized EPDM rubber particles to an ammoniating agent, carry out an ammoniation reaction at 80 - 90 °C and a pH value of 8 - 9 for 2 - 4 hours, wash with distilled water and dry to obtain the activated EPDM rubber particles.

[0014] Among them, the polyether-type polyurethane prepolymer is prepolymerized from diisocyanate, hyperbranched polyol, and polyether polyol / carbon nanomaterials under the action of an organotin catalyst. The specific preparation method of the polyether-type polyurethane prepolymer is as follows:

[0015] Place the polyether polyol in a disperser, heat to 80 °C, then slowly add carbon nanomaterials, and disperse evenly by high-speed shearing to obtain polyether polyol / carbon nanomaterials;

[0016] Weigh 10 - 20 parts of hyperbranched polyether polyol and 50 - 90 parts of polyether polyol / carbon nanomaterials, carry out high-temperature water removal for 2 - 3 hours at a temperature of 110 - 120 °C, add 20 - 50 parts of polyisocyanate under nitrogen protection, and carry out a catalytic reaction at a temperature of 70 - 90 °C for 1 - 2 hours to obtain the polyether-type polyurethane prepolymer.

[0017] Among them, the diisocyanate is at least one of methylcyclohexyl diisocyanate (HTDI), trimethylhexamethylene diisocyanate (TMDI), isophorone diisocyanate (IPDI), and 4,4'-dicyclohexylmethane diisocyanate (HMDI);

[0018] The hyperbranched polyol is a hydroxyl-terminated hyperbranched polyether polyol with a branching degree ≥ 0.7;

[0019] The polyether polyol is at least one of polypropylene glycol, polytetrahydrofuran glycol, polytetramethylene ether glycol, and tetrahydrofuran-propylene oxide copolymer glycol, and the carbon nanomaterial is hydroxylated carbon nanotubes;

[0020] The organotin catalyst is at least one of dibutyltin dilaurate, bis(dodecylthio)dibutyltin, dioctyltin in place of dibutyltin, and dialkyltin dimaleate.

[0021] Among them, the plasticizer is at least one of phthalate esters, aliphatic dibasic acid esters, benzene polycarboxylate esters, and benzoate esters;

[0022] The organosilicon defoamer is at least one of BYK-065, BYK-018, BYK-088, and BYK-066N;

[0023] The silane coupling agent is at least one of KH-560, KH-570, KH-590, and KH-791;

[0024] The ultraviolet absorber is at least one of UV-531, UV-329, UV-234, and UV-326.

[0025] Among them, the diamine curing agent is at least one of butanediamine, diethyltoluenediamine, dimethylthiotoluenediamine, and bis(sec-butylamino)diphenylmethane;

[0026] The thixotropic agent is at least one of fumed silica, precipitated silica, organic bentonite, and attapulgite;

[0027] The antioxidant is a blend of a hindered phenol antioxidant and a co-antioxidant, where the hindered phenol antioxidant is 2,6-tert-butyl-4-methylphenol, and the co-antioxidant is at least one of ditetradecyl alcohol esters, distearyl alcohol esters, tris(dodecyl alcohol) esters, and tris(hexadecyl alcohol) esters;

[0028] The organic pigment is at least one of aniline black, phthalocyanine blue, phthalocyanine green, and permanent yellow.

[0029] The present invention also provides a method for preparing an ultra-high toughness resin elastomer for preparing the ultra-high toughness resin elastomer as described above, including the following steps:

[0030] Stir the polyether-type polyurethane prepolymer, the plasticizer, the organosilicon defoamer, the silane coupling agent, and the ultraviolet absorber at room temperature for 30 - 60 min according to a preset weight portion to obtain the component A;

[0031] Mix the diamine curing agent, the thixotropic agent, the antioxidant and the organic pigment at room temperature according to the preset weight parts and stir for 10 - 30 min to obtain the B component;

[0032] Mix the A component and the B component according to a weight ratio of 100:5 - 15 and stir at room temperature for 2 - 5 min to obtain the polyurethane binder;

[0033] Add 15 - 25 parts of the C component to the polyurethane binder and stir at room temperature for 1 - 3 min to obtain the ultra - high toughness resin elastomer.

[0034] The present invention also provides an application of the ultra - high toughness resin elastomer, and the ultra - high toughness resin elastomer is applied to the expansion joints of small and medium - displacement concrete bridges, the longitudinal splicing expansion joints of bridges and other road deformation joints.

[0035] An ultra - high toughness resin elastomer, its preparation method and application of the present invention include a polyether - type polyurethane prepolymer, a plasticizer, an organosilicon defoamer, a silane coupling agent, an ultraviolet absorber, a diamine curing agent, a thixotropic agent, an antioxidant, an organic pigment and activated ethylene - propylene - diene monomer (EPDM) rubber particles. The EPDM rubber particles can increase the surface texture depth of the ultra - high toughness resin elastomer, improve the anti - skid performance of the seamless expansion joint, and effectively avoid vehicle skidding. At the same time, the polyether - type polyurethane prepolymer can react with functional groups such as amino groups on the surface of the activated EPDM rubber particles to form urea - based bridge bonds, forming a cross - linked network, significantly improving the compatibility between the EPDM rubber particles and polyurethane, being more conducive to forming a uniform and stable system, and improving the overall performance of the ultra - high toughness resin elastomer. At the same time, the ultraviolet absorber and the antioxidant can externally improve the aging resistance of the ultra - high toughness resin elastomer, and the internal and external synergistic effects improve the durability of the material. In addition, the ultra - high toughness resin elastomer provided by this technical solution has excellent use performance, bonding performance and deformation fatigue performance. Brief Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0037] Figure 1 is the flow chart of the steps of the preparation method of the ultra - high toughness resin elastomer provided by the present invention.

[0038] Figure 2 is the flow chart of the steps of the preparation method of the ultra - high toughness resin elastomer in Embodiment 1 of the present invention.

[0039] Figure 3 It is a flowchart of the steps of the preparation method of the ultra-high toughness resin elastomer in Embodiment 2 of the present invention.

[0040] Figure 4 It is a flowchart of the steps of the preparation method of the ultra-high toughness resin elastomer in Embodiment 3 of the present invention. Detailed implementation manners

[0041] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0042] The present invention provides an ultra-high toughness resin elastomer, which is composed of component A, component B and component C. The weight ratio of component A, component B and component C is 100:5-15:10-25;

[0043] Component A includes the following by weight: 100 parts of polyether-type polyurethane prepolymer, 5-10 parts of plasticizer, 0.1-0.2 parts of silicone defoamer, 0.5-2 parts of silane coupling agent and 0.5-1 part of ultraviolet absorber;

[0044] Component B includes the following by weight: 100 parts of diamine curing agent, 5-15 parts of thixotropic agent, 1-3 parts of antioxidant and 0.1-0.5 parts of organic pigment;

[0045] Component C is elastic particles, and the elastic particles are activated ethylene propylene diene monomer (EPDM) rubber particles.

[0046] In this embodiment, the EPDM rubber particles can increase the surface texture depth of the ultra-high toughness resin elastomer, improve the anti-slip performance of the seamless expansion joint, and effectively avoid vehicle skidding. At the same time, the polyether-type polyurethane prepolymer can react with functional groups such as amino groups on the surface of the activated EPDM rubber particles to generate ureido bridge bonds, forming a crosslinked network, significantly improving the compatibility between the EPDM rubber particles and polyurethane, and being more conducive to forming a uniform and stable system, improving the overall performance of the ultra-high toughness resin elastomer. At the same time, the ultraviolet absorber and the antioxidant can externally improve the aging resistance of the ultra-high toughness resin elastomer, and the internal and external synergistic effects improve the durability of the material. In addition, the ultra-high toughness resin elastomer provided by this technical solution has excellent use performance, bonding performance and deformation fatigue performance.

[0047] Further, the size of the activated EPDM rubber particles is 5-10 mesh, and the specific activation method of the EPDM rubber particles is:

[0048] The ethylene-propylene-diene monomer (EPDM) rubber particles are successively placed in a sodium hydroxide solution with a concentration of 5%, a hydrochloric acid solution with a concentration of 5%, and acetone, and washed for 30 - 60 minutes respectively. Then, they are washed clean with distilled water and dried to remove the additives and impurities on the surface of the EPDM rubber particles;

[0049] Under the conditions of 50 - 60 °C and a pH value of 3 - 5, the EPDM rubber particles are completely oxidized, washed clean with distilled water, and dried;

[0050] The oxidized EPDM rubber particles are added to an ammoniating agent, and under the conditions of 80 - 90 °C and a pH value of 8 - 9, an ammoniation reaction is carried out for 2 - 4 hours. Then, they are washed clean with distilled water and dried to obtain the activated EPDM rubber particles.

[0051] Furthermore, the polyether-type polyurethane prepolymer is prepolymerized from diisocyanate, hyperbranched polyol, and polyether polyol / carbon nanomaterials under the action of an organotin catalyst. The specific preparation method of the polyether-type polyurethane prepolymer is as follows:

[0052] The polyether polyol is placed in a disperser and heated to 80 °C. Then, the carbon nanomaterials are slowly added and dispersed evenly by high-speed shearing to obtain polyether polyol / carbon nanomaterials;

[0053] Weigh 10 - 20 parts of hyperbranched polyether polyol and 50 - 90 parts of polyether polyol / carbon nanomaterials. At a temperature of 110 - 120 °C, water is removed at high temperature for 2 - 3 hours. Under nitrogen protection, 20 - 50 parts of polyisocyanate are added, and a catalytic reaction is carried out at a temperature of 70 - 90 °C for 1 - 2 hours to obtain the polyether-type polyurethane prepolymer.

[0054] In this embodiment, the use of non-aromatic diisocyanate, hyperbranched polyol, and polyether polyol modified with carbon nanomaterials can inherently improve the yellowing resistance of the ultra-high toughness resin elastomer.

[0055] Furthermore, the diisocyanate is at least one of methylcyclohexyl diisocyanate (HTDI), trimethylhexamethylene diisocyanate (TMDI), isophorone diisocyanate (IPDI), and 4,4'-dicyclohexylmethane diisocyanate (HMDI);

[0056] The hyperbranched polyol is a hydroxyl-terminated hyperbranched polyether polyol with a branching degree ≥ 0.7;

[0057] The polyether polyol is at least one of polypropylene glycol, polytetrahydrofuran glycol, polytetramethylene ether glycol, and tetrahydrofuran-oxypropylene copolymer glycol, and the carbon nanomaterial is hydroxylated carbon nanotubes;

[0058] The organotin catalyst is at least one of dibutyltin dilaurate, bis(dodecylthio)dibutyltin, dioctyltin in place of dibutyltin, and dialkyltin dimaleate.

[0059] Furthermore, the plasticizer is at least one of phthalate esters, aliphatic dibasic acid esters, benzene polycarboxylic acid esters, and benzoate esters;

[0060] The silicone defoamer is at least one of BYK-065, BYK-018, BYK-088, and BYK-066N;

[0061] The silane coupling agent is at least one of KH-560, KH-570, KH-590, and KH-791;

[0062] The ultraviolet absorber is at least one of UV-531, UV-329, UV-234, and UV-326.

[0063] Furthermore, the diamine curing agent is at least one of butanediamine, diethyltoluenediamine, dimethylthiotoluenediamine, and bis(sec-butylamino)diphenylmethane;

[0064] The thixotropic agent is at least one of fumed silica, precipitated silica, organic bentonite, and attapulgite;

[0065] The antioxidant is a blend of a hindered phenol antioxidant and a co-antioxidant, where the hindered phenol antioxidant is 2,6-tri-tert-butyl-4-methylphenol, and the co-antioxidant is at least one of distearyl esters, dilauryl esters, tridodecyl esters, and tricetyl esters;

[0066] The organic pigment is at least one of aniline black, phthalocyanine blue, phthalocyanine green, and permanent yellow.

[0067] Please refer to Figure 1 , the present invention also provides a method for preparing an ultra-high toughness resin elastomer for preparing the ultra-high toughness resin elastomer as described above, including the following steps:

[0068] S1: Stir the polyether-type polyurethane prepolymer, the plasticizer, the silicone defoamer, the silane coupling agent, and the ultraviolet absorber at room temperature for 30-60 min according to a preset weight ratio to obtain the component A;

[0069] S2: Mix and stir the diamine curing agent, the thixotropic agent, the antioxidant, and the organic pigment at room temperature for 10-30 min according to a preset weight ratio to obtain the component B;

[0070] S3: Mix the component A and the component B at a weight ratio of 100:5 - 15, and stir at room temperature for 2 - 5 min to obtain the polyurethane binder;

[0071] S4: Add 15 - 25 parts of the component C to the polyurethane binder, and stir at room temperature for 1 - 3 min to obtain the ultra-high toughness resin elastomer.

[0072] In this embodiment, first, stir the polyether-type polyurethane prepolymer, the plasticizer, the organosilicon defoamer, the silane coupling agent, and the ultraviolet absorber at room temperature for 30 - 60 min according to the preset weight parts to obtain the component A, and stir the diamine curing agent, the thixotropic agent, the antioxidant, and the organic pigment at room temperature for 10 - 30 min according to the preset weight parts to obtain the component B. Then, mix the component A and the component B at a weight ratio of 100:5 - 15, and stir at room temperature for 2 - 5 min to obtain the polyurethane binder. Finally, add 15 - 25 parts of the component C to the polyurethane binder, and stir at room temperature for 1 - 3 min to obtain the ultra-high toughness resin elastomer.

[0073] Example 1;

[0074] Please refer to Figure 2 , the present invention also provides a method for preparing an ultra-high toughness resin elastomer for preparing the ultra-high toughness resin elastomer as described above, including the following steps:

[0075] S101: Stir 100 parts of the polyether-type polyurethane prepolymer, 5 parts of the plasticizer, 0.1 part of the organosilicon defoamer, 0.5 part of the silane coupling agent, and 0.5 part of the ultraviolet absorber at room temperature for 30 min to obtain the component A;

[0076] S102: Stir 100 parts of the diamine curing agent, 5 parts of the thixotropic agent, 1 part of the antioxidant, and 0.1 part of the organic pigment at room temperature for 10 min to obtain the component B;

[0077] S103: Mix the component A and the component B at a weight ratio of 100:5, and stir at room temperature for 2 min to obtain the polyurethane binder;

[0078] S104: Add 15 parts of the component C to the polyurethane binder, and stir at room temperature for 1 min to obtain the ultra-high toughness resin elastomer.

[0079] Example 2;

[0080] Please refer to Figure 3 , the present invention also provides a method for preparing an ultra-high toughness resin elastomer for preparing the ultra-high toughness resin elastomer as described above, including the following steps:

[0081] S201: Stir 100 parts of the polyether - type polyurethane prepolymer, 7.5 parts of the plasticizer, 0.15 part of the silicone defoamer, 1.25 parts of the silane coupling agent, and 0.75 part of the ultraviolet absorber at room temperature for 45 min to obtain the Component A;

[0082] S202: Mix and stir 100 parts of the diamine curing agent, 10 parts of the thixotropic agent, 2 parts of the antioxidant, and 0.3 part of the organic pigment at room temperature for 20 min to obtain the Component B;

[0083] S203: Mix the Component A and the Component B in a weight ratio of 100:10 and stir at room temperature for 3.5 min to obtain the polyurethane binder;

[0084] S204: Add 20 parts of the Component C to the polyurethane binder and stir at room temperature for 2 min to obtain the ultra - high toughness resin elastomer.

[0085] Example 3;

[0086] Please refer to Figure 4 , the present invention also provides a method for preparing an ultra - high toughness resin elastomer for preparing the ultra - high toughness resin elastomer as described above, including the following steps:

[0087] S301: Stir 100 parts of the polyether - type polyurethane prepolymer, 10 parts of the plasticizer, 0.2 part of the silicone defoamer, 2 parts of the silane coupling agent, and 1 part of the ultraviolet absorber at room temperature for 60 min to obtain the Component A;

[0088] S302: Mix and stir 100 parts of the diamine curing agent, 15 parts of the thixotropic agent, 3 parts of the antioxidant, and 0.5 part of the organic pigment at room temperature for 30 min to obtain the Component B;

[0089] S303: Mix the Component A and the Component B in a weight ratio of 100:15 and stir at room temperature for 5 min to obtain the polyurethane binder;

[0090] S304: Add 25 parts of the Component C to the polyurethane binder and stir at room temperature for 3 min to obtain the ultra - high toughness resin elastomer.

[0091] Comparative Example 1;

[0092] Same as Example 3, the difference is that the Component C is unactivated ethylene - propylene - diene monomer (EPDM) rubber particles.

[0093] The present invention also includes the test results of the performance indicators of the ultra - high toughness resin elastomer (Example 3 and Comparative Example 1), and the results are shown in Table 1:

[0094] Table 1 Performance Indexes of Ultra-High Toughness Resin Elastomer

[0095] Test item Example 3 Comparative example 1 Conventional technology Elongation loss rate after aging (%) 9.3 12.7 20.6 OT total fracture energy (J) 168.5 133.0 111.2 Bump value (BPN) 67 60 49

[0096] Other performance indexes: hardness 65 - 70 IRHD, dynamic stability at 60°C > 20000 times / mm, flexural tensile strain at -10°C > 40000 με. The loss rate of elongation after aging can reflect the anti-aging performance, the total fracture energy of OT can reflect the deformation fatigue performance, and the pendulum value can reflect the anti-skid performance.

[0097] The ultra-high toughness resin elastomer provided by the present invention is applied to expansion joints of small and medium-displacement concrete bridges, longitudinal splicing expansion joints of bridges and other road deformation joints.

[0098] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the invention.

Claims

1. A super-high toughness resin elastomer, characterized in that, the super-high toughness resin elastomer is composed of component A, component B and component C, and the weight ratio of component A, component B and component C is 100:5 - 15:10 - 25; Component A includes the following by weight: 100 parts of polyether-type polyurethane prepolymer, 5 - 10 parts of plasticizer, 0.1 - 0.2 parts of organosilicon defoamer, 0.5 - 2 parts of silane coupling agent and 0.5 - 1 part of ultraviolet absorber; Component B includes the following by weight: 100 parts of diamine curing agent, 5 - 15 parts of thixotropic agent, 1 - 3 parts of antioxidant and 0.1 - 0.5 parts of organic pigment; Component C is elastic particles, and the elastic particles are activated ethylene propylene diene monomer (EPDM) particles.

2. The super-high toughness resin elastomer according to claim 1, characterized in that, the activated EPDM particles have a size of 5 - 10 mesh, and the specific activation method of the EPDM particles is: The EPDM particles are successively placed in a sodium hydroxide solution with a concentration of 5%, a hydrochloric acid solution with a concentration of 5% and acetone, and washed for 30 - 60 min respectively, and then washed clean with distilled water and dried to remove the additives and impurities on the surface of the EPDM particles; Under the conditions of 50 - 60 °C and a pH value of 3 - 5, the EPDM particles are completely oxidized, washed clean with distilled water and dried; The oxidized EPDM particles are added to an ammoniating agent, and ammoniation reaction is carried out for 2 - 4 h under the conditions of 80 - 90 °C and a pH value of 8 - 9, washed clean with distilled water and dried to obtain the activated EPDM particles.

3. The super-high toughness resin elastomer according to claim 1, characterized in that, the polyether-type polyurethane prepolymer is prepolymerized from diisocyanate, hyperbranched polyol and polyether polyol / carbon nanomaterials under the action of an organotin catalyst, and the specific preparation method of the polyether-type polyurethane prepolymer is: The polyether polyol is placed in a disperser, heated to 80 °C, and then the carbon nanomaterials are slowly added and dispersed evenly by high-speed shearing to obtain polyether polyol / carbon nanomaterials; Weigh 10 - 20 parts of hyperbranched polyether polyol and 50 - 90 parts of polyether polyol / carbon nanomaterials, carry out high-temperature water removal for 2 - 3 h at a temperature of 110 - 120 °C, add 20 - 50 parts of polyisocyanate under nitrogen protection, and carry out catalytic reaction for 1 - 2 h at a temperature of 70 - 90 °C to obtain the polyether-type polyurethane prepolymer.

4. The super-high toughness resin elastomer according to claim 3, characterized in that, the diisocyanate is at least one of methylcyclohexyl diisocyanate (HTDI), trimethylhexamethylene diisocyanate (TMDI), isophorone diisocyanate (IPDI), 4,4'-dicyclohexylmethane diisocyanate (HMDI); the hyperbranched polyol is a hydroxyl-terminated hyperbranched polyether polyol with a branching degree ≥ 0.7; the polyether polyol is at least one of polypropylene glycol, polytetrahydrofuran glycol, polytetramethylene ether glycol, tetrahydrofuran-oxide propylene copolymer glycol, and the carbon nanomaterial is hydroxylated carbon nanotubes; The organotin catalyst is at least one of dibutyltin dilaurate, bis(dodecylthio)dibutyltin, dioctyltin in place of dibutyltin, and dialkyltin dimaleate.

5. The ultra-high toughness resin elastomer according to claim 1, characterized in that the plasticizer is at least one of phthalate esters, aliphatic dibasic acid esters, benzene polycarboxylic acid esters, and benzoic acid esters; the silicone defoamer is at least one of BYK-065, BYK-018, BYK-088, and BYK-066N; the silane coupling agent is at least one of KH-560, KH-570, KH-590, and KH-791; the ultraviolet absorber is at least one of UV-531, UV-329, UV-234, and UV-326.

6. The ultra-high toughness resin elastomer according to claim 1, characterized in that the diamine curing agent is at least one of butanediamine, diethyltoluenediamine, dimethylthiotoluenediamine, and bis(sec-butylamino)diphenylmethane; the thixotropic agent is at least one of fumed silica, precipitated silica, organobentonite, and attapulgite; the antioxidant is a blend of a hindered phenol antioxidant and a co-antioxidant, wherein the hindered phenol antioxidant is 2,6-tert-butyl-4-methylphenol, and the co-antioxidant is at least one of ditetradecyl alcohol esters, distearyl alcohol esters, tris(dodecyl alcohol) esters, and tris(hexadecyl alcohol) esters; the organic pigment is at least one of aniline black, phthalocyanine blue, phthalocyanine green, and permanent yellow.

7. A method for preparing an ultra-high toughness resin elastomer, which is used to prepare the ultra-high toughness resin elastomer as described in claim 1, characterized in that, It includes the following steps: Stir the polyether-type polyurethane prepolymer, the plasticizer, the silicone defoamer, the silane coupling agent, and the ultraviolet absorber at room temperature for 30 - 60 min according to preset weight parts to obtain the A component; Mix and stir the diamine curing agent, the thixotropic agent, the antioxidant, and the organic pigment at room temperature for 10 - 30 min according to preset weight parts to obtain the B component; Mix the A component and the B component in a weight ratio of 100:5 - 15 and stir at room temperature for 2 - 5 min to obtain the polyurethane binder; Add 15 - 25 parts of the C component to the polyurethane binder and stir at room temperature for 1 - 3 min to obtain the ultra-high toughness resin elastomer.

8. An ultra-high toughness resin elastomer as described in claim 1, characterized in that, It is applied to the expansion joints of medium and small displacement concrete bridges, the longitudinal splicing expansion joints of bridges, and other road deformation joints.

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