A modified epoxy asphalt material, its preparation method and use

Abstract

The application provides a modified epoxy asphalt material and a preparation method and application thereof, and belongs to the technical field of epoxy asphalt. In the application, a compounded acid anhydride and amide curing agent is used as an epoxy resin curing agent, the epoxy resin and a toughening agent are subjected to pre-polycondensation reaction, then under the synergistic action of various additives (compatibility agents, diluents and curing retarders), the curing agent and the epoxy resin are subjected to curing cross-linking reaction to form modified epoxy asphalt with the cured epoxy resin as a continuous phase and asphalt as a dispersed phase, so that the modified epoxy asphalt has excellent mechanical properties and low-temperature resistance, and the defects of the epoxy resin after curing, such as brittleness, poor impact resistance, low-temperature cracking, insufficient durability and the like, are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of epoxy asphalt, in particular to a modified epoxy asphalt material and a preparation method and application thereof. BACKGROUND

[0002] The epoxy asphalt is composed of base asphalt, epoxy resin and curing agent, the epoxy resin is used as a modifier, under the action of the curing agent, the epoxy resin occurs ring-opening reaction to form a spatial network structure during mixing, and the base asphalt is wrapped inside. Based on the characteristics of phase composition, the epoxy asphalt will not deform by melting even in a high temperature environment, has better temperature adaptability than ordinary asphalt, has good interlayer bonding force, high temperature stability, strong fatigue resistance and good corrosion resistance.

[0003] The epoxy asphalt is applied in the fields of aerospace, chemical industry, medicine, civil engineering and the like due to its good adhesion, corrosion resistance, heat resistance and chemical stability. Since the development of the epoxy asphalt, due to its good use performance and broad application prospect, the epoxy asphalt has been generally researched at home and abroad, and a large number of research results have been achieved. Although the epoxy asphalt has been modified and optimized for several generations and widely practiced in engineering, its construction performance and road performance have been greatly improved, but there are still some problems, such as the defects of the epoxy resin used for preparing the epoxy asphalt, such as brittleness, poor impact resistance and insufficient crack resistance after curing, and problems in the use process, such as low-temperature cracking, poor skid resistance and permeability resistance, insufficient durability and the like, and its long-term use performance needs to be improved. SUMMARY

[0004] The present application aims to provide a modified epoxy asphalt material and a preparation method and application thereof, the modified epoxy asphalt material has excellent mechanical properties and low-temperature resistance, and excellent long-term use performance.

[0005] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0006] The present application provides a modified epoxy asphalt material, which comprises the following preparation raw materials in mass fraction:

[0007] 200 parts of asphalt, 50-150 parts of epoxy prepolymer, 5-15 parts of amide curing agent, 2-12 parts of acid anhydride curing agent, 0.5-5 parts of compatibilizer, 2-10 parts of diluent and 0.2-5 parts of curing retarder;

[0008] The preparation raw materials of the epoxy prepolymer include the following in mass fraction based on the mass fraction of the asphalt:

[0009] 50-150 parts of epoxy resin and 0.2-5 parts of toughening agent.

[0010] Preferably, the epoxy resin is a bisphenol A type epoxy resin, a phenol aldehyde type epoxy resin or a bisphenol F type epoxy resin; the toughening agent is a water-based polyurethane, a carboxyl-terminated liquid nitrile rubber or an epoxy-terminated silicone oil.

[0011] Preferably, the preparation method of the epoxy prepolymer comprises: mixing the epoxy resin and the toughening agent, and performing a pre-polycondensation reaction to obtain the epoxy prepolymer; the pre-polycondensation reaction is performed at a temperature of 40-140℃ for 10-60min.

[0012] Preferably, the amide curing agent is low molecular polyamide 651, low molecular polyamide 300 or low molecular polyamide 315; the anhydride curing agent is polysebacic anhydride, tung oil anhydride or methylhexahydrophthalic anhydride.

[0013] Preferably, the compatibilizer is polyether polyol L61, polyether polyol L68, polyether polyol L44 or polyether polyol F68.

[0014] Preferably, the diluent is butyl glycidyl ether, glycidol 12-14 alkyl ether, polypropylene glycol diglycidyl ether or 1,6-hexanediol diglycidyl ether.

[0015] Preferably, the curing retarder is aluminum ethyl hypophosphite, diethyl aluminum hypophosphite or methyl ethyl aluminum hypophosphite.

[0016] The application provides a preparation method of the modified epoxy asphalt material.

[0017] The asphalt, the epoxy prepolymer, the amide curing agent, the anhydride curing agent, the compatibilizer, the diluent and the curing retarder are mixed to perform a curing cross-linking reaction to obtain the modified epoxy asphalt material.

[0018] Preferably, the curing cross-linking reaction is performed at a temperature of 50-150℃ for 10-60min.

[0019] The application provides an application of the modified epoxy asphalt material or the modified epoxy asphalt material prepared by the preparation method in the fields of aerospace, chemical industry and medicine or civil engineering.

[0020] The present application adopts epoxy prepolymer formed by toughening agent and epoxy resin as epoxy resin matrix, adopts anhydride and amide curing agent as compound curing agent, and the compound curing agent and epoxy resin matrix can occur curing crosslinking reaction under the synergistic effect of various additives (compatibility agent, diluent and curing retarder), the asphalt is bound in the three-dimensional crosslinking network formed by epoxy resin, and the modified epoxy asphalt with cured epoxy resin as continuous phase and asphalt as dispersed phase is formed. Since the thermosetting epoxy resin is used as matrix, the thermoplastic characteristics of asphalt can be changed, and the irreversible multiphase thermosetting composite material which does not flow under high temperature condition is formed, so that the asphalt is endowed with superior mechanical properties.

[0021] The epoxy prepolymer used in the present application is formed by pre-polymerization of epoxy resin and toughening agent, the toughening agent in the epoxy prepolymer is bonded with the epoxy resin, which can increase the flexible groups in the molecular structure, improve the rigid structure of the resin, and improve the toughness of the resin, thereby reducing the brittleness at low temperature and improving the low temperature resistance. Then the mixture of the toughened resin, asphalt and curing agent can form a thermosetting material with certain toughness and stability and with the asphalt uniformly dispersed in the crosslinking network of the epoxy resin through curing crosslinking reaction under the synergistic effect of the compatibility agent and the diluent. In addition, the compatibility agent promotes the formation of a uniform system of epoxy resin and asphalt; the diluent is used to reduce the viscosity of the system, facilitating uniform blending of different materials; and the curing retarder reduces the curing reaction rate, facilitating construction operation. The modified epoxy asphalt material provided by the present application has excellent mechanical properties and low temperature resistance, and solves the defects of large brittleness, poor impact resistance, low temperature cracking, insufficient durability and the like after curing of the epoxy resin.

[0022] The modified epoxy asphalt material provided by the present application has a tensile strength of 1.9-6.0 MPa, an elongation at break of 85-240%, an elastic modulus at-25℃ of 1534-2534 MPa, and an elastic modulus at 25℃ of 335-701 MPa. Compared with the existing preparation method of epoxy asphalt, the raw materials used in the present application are all commercially available and inexpensive. DETAILED DESCRIPTION

[0023] The present application provides a modified epoxy asphalt material, which comprises the following preparation raw materials in mass fraction:

[0024] Asphalt 200 parts, epoxy prepolymer 50-150 parts, amide curing agent 5-15 parts, anhydride curing agent 2-12 parts, compatibility agent 0.5-5 parts, diluent 2-10 parts, and curing retarder 0.2-5 parts.

[0025] The preparation raw materials of the epoxy prepolymer include, based on the mass fraction of the asphalt:

[0026] Epoxy resin 50-150 parts and toughening agent 0.2-5 parts.

[0027] In the present application, the raw materials used are all commercially available products well known in the art, unless otherwise specified.

[0028] The raw materials for preparing the modified epoxy asphalt material provided by the present application include 200 parts of asphalt in terms of mass fraction. The present application does not have special limitations on the type of the asphalt, and any corresponding asphalt well known in the art can be used; in the embodiments of the present application, it is specifically 70# road asphalt.

[0029] The raw materials for preparing the modified epoxy asphalt material provided by the present application include 50-150 parts of epoxy prepolymer in terms of mass fraction of the asphalt, preferably 60-130 parts, more preferably 80-120 parts, and further preferably 90-105 parts.

[0030] The raw materials for preparing the epoxy prepolymer include, in terms of mass fraction of the asphalt:

[0031] 50-150 parts of epoxy resin and 0.2-5 parts of toughening agent.

[0032] In the present application, the epoxy resin is preferably 60-130 parts, more preferably 80-120 parts, and further preferably 90-100 parts; the epoxy resin is preferably bisphenol A type epoxy resin, phenolic type epoxy resin or bisphenol F type epoxy resin. The present application does not have special limitations on the type of the epoxy resin, and any corresponding type of epoxy resin well known in the art can be used; in the embodiments of the present application, the bisphenol A type epoxy resin is specifically EP828, EP128 or EP400; the bisphenol F type epoxy resin is specifically EP828, EP128, EP400 or EP828AB.

[0033] In the present application, the toughening agent is preferably 0.5-4 parts, more preferably 1.0-3 parts, and further preferably 1.5-2.5 parts; the toughening agent is preferably waterborne polyurethane, carboxyl-terminated liquid nitrile rubber (CTBN) or epoxy-terminated silicone oil.

[0034] In the present application, the preparation method of the epoxy prepolymer preferably includes: mixing the epoxy resin and the toughening agent, and performing pre-polycondensation reaction to obtain the epoxy prepolymer; the temperature of the pre-polycondensation reaction is preferably 40-140°C, more preferably 75-120°C, and further preferably 80-90°C; the time is preferably 10-60 min, more preferably 20-50 min, and further preferably 35-45 min. During the pre-polycondensation reaction, the toughening agent and the epoxy group of the epoxy resin undergo ring-opening reaction, and then cross-linking reaction with the active groups of the toughening agent.

[0035] The epoxy resin and the toughening agent are preferably mixed after being preheated to a flow state; the flow state is not particularly limited in the present application, and can be determined according to the flow state known in the art; the epoxy prepolymer is preferably prepared under stirring; the stirring speed is preferably 300 r / min.

[0036] The preparation raw material of the modified epoxy asphalt material provided by the present application includes 5-15 parts of an amide curing agent, preferably 6-13 parts, more preferably 7-12 parts, and further preferably 8-10 parts, based on the mass fraction of the asphalt. In the present application, the amide curing agent is preferably low-molecular polyamide 651, low-molecular polyamide 300 or low-molecular polyamide 315.

[0037] The preparation raw material of the modified epoxy asphalt material provided by the present application includes 2-12 parts of an anhydride curing agent, preferably 4-10 parts, more preferably 5-9 parts, and further preferably 6-8 parts, based on the mass fraction of the asphalt. In the present application, the anhydride curing agent is preferably polysebacic anhydride, tung oil anhydride or methylhexahydrophthalic anhydride.

[0038] The preparation raw material of the modified epoxy asphalt material provided by the present application includes 0.5-5 parts of a compatibilizer, preferably 0.6-4 parts, more preferably 1-3 parts, and further preferably 1.5-2.5 parts, based on the mass fraction of the asphalt. In the present application, the compatibilizer is preferably polyether polyol L61, polyether polyol L68, polyether polyol L44 or polyether polyol F68.

[0039] The preparation raw material of the modified epoxy asphalt material provided by the present application includes 2-10 parts of a diluent, preferably 3-9 parts, more preferably 4-8 parts, and further preferably 5-6 parts, based on the mass fraction of the asphalt. In the present application, the diluent is preferably butyl glycidyl ether, glycidol 12-14 alkyl ether, polypropylene glycol diglycidyl ether or 1,6-hexanediol diglycidyl ether.

[0040] The preparation raw material of the modified epoxy asphalt material provided by the present application includes 0.2-5 parts of a curing retarder, preferably 0.5-4 parts, more preferably 0.8-4 parts, and further preferably 1-3 parts, based on the mass fraction of the asphalt. In the present application, the curing retarder is preferably aluminum ethyl hypophosphite, aluminum diethyl hypophosphite or aluminum methyl ethyl hypophosphite.

[0041] In the present application, the mass ratio of the asphalt, the epoxy prepolymer, the amide curing agent, the anhydride curing agent, the compatibilizer, the diluent and the curing retarder is preferably 200:100:10:7:2.5:6:2.5.

[0042] The application provides a preparation method of the modified epoxy asphalt material.

[0043] The asphalt, the epoxy prepolymer, the amide curing agent, the acid anhydride curing agent, the compatilizer, the diluent and the curing retarder are mixed to perform a curing cross-linking reaction, so that the modified epoxy asphalt material is obtained.

[0044] In the application, the mixing is preferably performed under stirring and at a temperature 20℃ lower than the curing cross-linking reaction temperature, the mixing time is preferably 5min, and the stirring speed is preferably 300r / min; the curing cross-linking reaction temperature is preferably 50-150℃, more preferably 70-130℃, further preferably 80-120℃, and most preferably 100℃; the time is preferably 10-60min, more preferably 20-50min, further preferably 30-40min, and most preferably 35min; and the curing cross-linking reaction is preferably performed under stirring, and the stirring speed is preferably 300r / min.

[0045] The application provides an application of the modified epoxy asphalt material or the modified epoxy asphalt material prepared by the preparation method in the fields of aerospace, chemical industry, medicine or civil engineering. The application method is not specially limited in the application, and the application method is well known in the art.

[0046] The technical solutions provided by the application will be described in detail below in combination with examples, but they should not be understood as limitations to the protection scope of the application.

[0047] Example 1

[0048] (1) 100 parts by weight of bisphenol A type epoxy resin EP828 and 1 part by weight of epoxy-terminated silicone oil are mixed after being preheated to a flow state, stirred at a temperature of 60℃ for 20min, and the stirring speed is 300r / min, so that an epoxy prepolymer a1 is obtained.

[0049] (2) 80 parts by weight of the epoxy prepolymer a1, 200 parts by weight of 70# road asphalt, 7 parts by weight of low molecular weight polyamide 300, 5 parts by weight of sebacic anhydride, 1 part by weight of polyether polyol L68, 4 parts by weight of butyl glycidyl ether and 0.8 parts by weight of aluminum ethyl hypophosphite are mixed, stirred at a temperature of 50℃ for 5min, the stirring speed is 300r / min, and constant temperature reaction is performed at a temperature of 70℃ for 20min, so that an epoxy asphalt A1 is obtained.

[0050] Example 2

[0051] (1) 100 parts by weight of bisphenol A type epoxy resin EP128 and 2.5 parts by weight of carboxyl-terminated liquid nitrile rubber were mixed after being preheated to a flowable state, stirred at a temperature of 90°C for 35 min at a stirring speed of 300 r / min, to obtain an epoxy prepolymer a2;

[0052] (2) 100 parts by weight of the epoxy prepolymer a2 was mixed with 200 parts by weight of 70# road asphalt, 10 parts by weight of low molecular weight polyamide 6517, 2.5 parts by weight of polyether polyol F68, 6 parts by weight of glycidol 12-14 alkyl ether and 2.5 parts by weight of aluminum methyl ethyl hypophosphite, stirred at a temperature of 80°C for 5 min at a stirring speed of 300 r / min, and reacted at a temperature of 100°C for 35 min, to obtain an epoxy asphalt A2.

[0053] Example 3

[0054] (1) 100 parts by weight of bisphenol A type epoxy resin EP400 and 5 parts by weight of water-based polyurethane were mixed after being preheated to a flowable state, stirred at a temperature of 120°C for 50 min at a stirring speed of 300 r / min, to obtain an epoxy prepolymer a3;

[0055] (2) 105 parts by weight of the epoxy prepolymer a3 was mixed with 200 parts by weight of 70# road asphalt, 13 parts by weight of low molecular weight polyamide 315, 9 parts by weight of sebacic anhydride, 4 parts by weight of polyether polyol L44, 8 parts by weight of polypropylene glycol diglycidyl ether and 4 parts by weight of aluminum ethyl hypophosphite, stirred at a temperature of 110°C for 5 min at a stirring speed of 300 r / min, and reacted at a temperature of 130°C for 50 min, to obtain an epoxy asphalt A3.

[0056] Example 4

[0057] (1) 100 parts by weight of bisphenol F type epoxy resin EP828 and 3 parts by weight of water-based polyurethane were mixed after being preheated to a flowable state, stirred at a temperature of 95°C for 40 min at a stirring speed of 300 r / min, to obtain an epoxy prepolymer a4;

[0058] (2) 95 parts by weight of the epoxy prepolymer a4 was mixed with 200 parts by weight of 70# road asphalt, 10.5 parts by weight of low molecular weight polyamide 651, 7.5 parts by weight of tung oil anhydride, 1.5 parts by weight of polyether polyol L61, 6 parts by weight of butyl glycidyl ether and 2 parts by weight of diethyl aluminum hypophosphite, stirred at a temperature of 95°C for 5 min at a stirring speed of 300 r / min, and reacted at a temperature of 115°C for 40 min, to obtain an epoxy asphalt A4.

[0059] Example 5

[0060] (1) 100 parts by weight of bisphenol F type epoxy resin EP128 and 2.5 parts by weight of epoxy-terminated silicone oil were mixed after being preheated to a flowable state, stirred at a temperature of 90°C for 30 min, and the stirring speed was 300 r / min, to obtain an epoxy prepolymer a5;

[0061] (2) 95 parts by weight of the epoxy prepolymer a5 was mixed with 200 parts by weight of 70# road asphalt, 11 parts by weight of low molecular weight polyamide 300, 6 parts by weight of methylhexahydrophthalic anhydride, 4 parts by weight of polyether polyol F68, 8 parts by weight of glycidol 12-14 alkyl ether, and 4 parts by weight of aluminum methyl ethyl hypophosphite at a temperature of 80°C for 5 min, the stirring speed was 300 r / min, and constant temperature reaction was carried out at a temperature of 100°C for 35 min, to obtain an epoxy asphalt A5.

[0062] Example 6

[0063] (1) 100 parts by weight of bisphenol F type epoxy resin EP400 and 4 parts by weight of epoxy-terminated silicone oil were mixed after being preheated to a flowable state, stirred at a temperature of 75°C for 30 min, and the stirring speed was 300 r / min, to obtain an epoxy prepolymer a6;

[0064] (2) 90 parts by weight of the epoxy prepolymer a6 was mixed with 200 parts by weight of 70# road asphalt, 10 parts by weight of low molecular weight polyamide 315, 7 parts by weight of tung oil anhydride, 3.5 parts by weight of polyether polyol L61, 5 parts by weight of polypropylene glycol diglycidyl ether, and 1.5 parts by weight of aluminum diethyl hypophosphite at a temperature of 110°C for 5 min, the stirring speed was 300 r / min, and constant temperature reaction was carried out at a temperature of 130°C for 20 min, to obtain an epoxy asphalt A6.

[0065] Example 7

[0066] (1) 100 parts by weight of bisphenol A type epoxy resin EP828 and 2 parts by weight of waterborne polyurethane were mixed after being preheated to a flowable state, stirred at a temperature of 90°C for 20 min, and the stirring speed was 300 r / min, to obtain an epoxy prepolymer a7;

[0067] (2) 80 parts by weight of the epoxy prepolymer a7 was mixed with 200 parts by weight of 70# road asphalt, 9 parts by weight of low molecular weight polyamide 651, 6 parts by weight of sebacic anhydride, 3 parts by weight of polyether polyol L68, 7 parts by weight of butyl glycidyl ether, and 1.5 parts by weight of aluminum ethyl hypophosphite at a temperature of 95°C for 5 min, the stirring speed was 300 r / min, and constant temperature reaction was carried out at a temperature of 115°C for 35 min, to obtain an epoxy asphalt A7.

[0068] Example 8

[0069] (1) 100 parts by weight of bisphenol F type epoxy resin EP128 and 4 parts by weight of carboxyl-terminated butyl nitrile rubber were mixed after being preheated to a flow state, stirred at a temperature of 80°C for 45 min, and the stirring speed was 300 r / min, to obtain an epoxy prepolymer a8;

[0070] (2) 80 parts by weight of the epoxy prepolymer a8 was mixed with 200 parts by weight of 70# road asphalt, 8.5 parts by weight of low molecular weight polyamide 300, 6.5 parts by weight of methyl hexahydrophthalic anhydride, 3 parts by weight of polyether polyol L68, 5 parts by weight of butyl glycidyl ether, and 1.5 parts by weight of aluminum diethyl hypophosphite, stirred at a temperature of 100°C for 5 min, and the stirring speed was 300 r / min, and reacted at a temperature of 120°C for 45 min, to obtain an epoxy asphalt A8.

[0071] Example 9

[0072] (1) 100 parts by weight of bisphenol A type epoxy resin EP128 and 2 parts by weight of carboxyl-terminated butyl nitrile rubber were mixed after being preheated to a flow state, stirred at a temperature of 70°C for 25 min, and the stirring speed was 300 r / min, to obtain an epoxy prepolymer a9;

[0073] (2) 85 parts by weight of the epoxy prepolymer a9 was mixed with 200 parts by weight of 70# road asphalt, 8 parts by weight of sebacic anhydride, 5.5 parts by weight of low molecular weight polyamide 651, 2.5 parts by weight of polyether polyol F68, 6.5 parts by weight of polypropylene glycol diglycidyl ether, and 3.5 parts by weight of methyl ethyl hypophosphite, stirred at a temperature of 70°C for 5 min, and the stirring speed was 300 r / min, and reacted at a temperature of 90°C for 25 min, to obtain an epoxy asphalt A9.

[0074] Example 10

[0075] (1) 100 parts by weight of bisphenol F type epoxy resin EP400 and 3 parts by weight of water-based polyurethane were mixed after being preheated to a flow state, stirred at a temperature of 65°C for 35 min, and the stirring speed was 300 r / min, to obtain an epoxy prepolymer a10;

[0076] (2) 95 parts by weight of the epoxy prepolymer a10 was mixed with 200 parts by weight of 70# road asphalt, 9.5 parts by weight of low molecular weight polyamide 651, 8 parts by weight of tung oil anhydride, 1.5 parts by weight of polyether polyol L61, 5.5 parts by weight of glycidol 12-14 alkyl ether, and 3 parts by weight of ethyl hypophosphite, stirred at a temperature of 60°C for 5 min, and the stirring speed was 300 r / min, and reacted at a temperature of 80°C for 30 min, to obtain an epoxy asphalt A10.

[0077] Example 11

[0078] (1) 100 parts by weight of bisphenol A type epoxy resin EP828 and 2.5 parts by weight of epoxy-terminated silicone oil were mixed after being preheated to a flowable state, stirred at a temperature of 100°C for 30 min at a stirring speed of 300 r / min, to obtain an epoxy prepolymer a11;

[0079] (2) 100 parts by weight of the epoxy prepolymer a11 was mixed with 200 parts by weight of 70# road asphalt, 7.5 parts by weight of low-molecular polyamide 300, 7.5 parts by weight of tung oil anhydride, 3.5 parts by weight of polyether polyol L44, 6 parts by weight of polypropylene glycol diglycidyl ether and 2 parts by weight of diethyl aluminum hypophosphite, stirred at a temperature of 65°C for 5 min at a stirring speed of 300 r / min, and reacted at a temperature of 85°C for 35 min to obtain an epoxy asphalt A11.

[0080] Example 12

[0081] (1) 100 parts by weight of bisphenol F type epoxy resin EP828AB and 2.5 parts by weight of carboxyl-terminated butylnitrile rubber were mixed after being preheated to a flowable state, stirred at a temperature of 95°C for 45 min at a stirring speed of 300 r / min, to obtain an epoxy prepolymer a12;

[0082] (2) 90 parts by weight of the epoxy prepolymer a12 was mixed with 200 parts by weight of 70# road asphalt, 13 parts by weight of low-molecular polyamide 315, 8.5 parts by weight of methylhexahydrophthalic anhydride, 4 parts by weight of polyether polyol L68, 4.5 parts by weight of glycidyl 12-14 alkyl ether and 2.5 parts by weight of methyl ethyl aluminum hypophosphite, stirred at a temperature of 75°C for 5 min at a stirring speed of 300 r / min, and reacted at a temperature of 95°C for 50 min to obtain an epoxy asphalt A12.

[0083] Performance test

[0084] 1) Mechanical property analysis

[0085] The epoxy asphalt prepared in different examples was made into a sample strip with a size of 33 mm in length and 6 mm in width, and the thickness was measured according to the three-point average method and averaged. A universal material testing machine was used to test according to GB / T 528-2009 “Determination of Tensile Stress-Strain Properties of Vulcanized or Thermoplastic Rubber”, and the test conditions were: a tensile rate of 500 mm·min -1 , and a temperature of 25°C. The same sample was measured 5 times, and the average value of the results was taken to obtain the tensile strength and elongation at break of the material.

[0086] 2) Dynamic mechanical analysis (DMA)

[0087] The viscoelastic properties and compatibility of the epoxy asphalt material are tested by DMA dynamic mechanical analysis. The DMA test is performed on a DMA224 produced by Germany Zwick & Co. KG, and the cured sample is cut into a size of 25mmx2.5mmx2mm. The experiment adopts a three-point bending mode, the frequency is 10Hz, the temperature rising rate is 3℃·min -1 , and the temperature interval is-50-70℃.

[0088] The test results are shown in Table 1.

[0089] Table 1: Performance data of the epoxy asphalt material prepared in Examples 1-12

[0090] Case Tensile strength (MPa) Elongation at break (%) Elastic modulus at -25°C (MPa) Elastic modulus at 25°C (MPa) Example 1 1.93 108 1534.5 336.3 Example 2 3.34 229.5 1973.6 455.8 Example 3 5.51 133.5 2465.1 675.2 Example 4 4.22 168 2132.3 616.7 Example 5 3.58 218.5 2003.7 499.1 Example 6 3.01 216 1991.4 477.9 Example 7 2.88 238 1899.2 474 Example 8 3.25 207.5 1978.6 487.3 Example 9 3.11 199 2035.5 464.2 Example 10 3.57 223.5 1988.4 501.1 Example 11 2.35 135.5 1652.3 413.5 Example 12 5.88 85.5 2534.1 701.1

[0091] As shown in Table 1, the modified epoxy asphalt provided by the present application has excellent mechanical properties and low-temperature resistance.

[0092] The above description is only preferred embodiments of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A modified bitumen material, characterized in that, Prepared from the following mass parts of raw materials: Asphalt 200 parts, epoxy prepolymer 50~150 parts, amide curing agent 5~15 parts, acid anhydride curing agent 2~12 parts, compatibilizer 0.5~5 parts, diluent 2~10 parts, curing retarder 0.2~5 parts; The raw materials for preparing the epoxy prepolymer include, based on the mass parts of the asphalt: Epoxy resin 50~150 parts, toughening agent 0.2~5 parts; The epoxy resin is bisphenol A type epoxy resin, phenolic type epoxy resin or bisphenol F type epoxy resin; the toughening agent is carboxyl-terminated liquid nitrile rubber; The preparation method of the epoxy prepolymer includes: mixing epoxy resin and toughening agent, and performing pre-polycondensation reaction to obtain epoxy prepolymer; the pre-polycondensation reaction temperature is 40~140℃, and the time is 10~60min; The compatibilizer is polyether polyol L61, polyether polyol L68, polyether polyol L44 or polyether polyol F68; The diluent is butyl glycidyl ether, glycidol 12-14 alkyl ether, polypropylene glycol diglycidyl ether or 1,6-hexanediol diglycidyl ether; The curing retarder is aluminum ethyl hypophosphite, diethyl aluminum hypophosphite or methyl ethyl aluminum hypophosphite; The amide curing agent is low molecular weight polyamide 651, low molecular weight polyamide 300 or low molecular weight polyamide 315; the acid anhydride curing agent is polysebacic anhydride, tung oil anhydride or methyl hexahydrophthalic anhydride.

2. The method of producing the modified bitumen material of claim 1, characterized in that, The method comprises the following steps: Mixing asphalt, epoxy prepolymer, amide curing agent, acid anhydride curing agent, compatibilizer, diluent and curing retarder, and performing curing crosslinking reaction to obtain modified epoxy asphalt material.

3. The preparation method according to claim 2, characterized in that, The curing crosslinking reaction temperature is 50~150℃, and the time is 10~60min.

4. The application of the modified epoxy asphalt material of claim 1 or the modified epoxy asphalt material prepared by the preparation method of any one of claims 2~3 in the fields of aerospace, chemical industry and medicine or civil engineering.