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CN-121975339-A - Bio-based epoxy resin modified asphalt and preparation method thereof

CN121975339ACN 121975339 ACN121975339 ACN 121975339ACN-121975339-A

Abstract

The invention discloses bio-based epoxy resin modified asphalt which comprises a first component and a second component, wherein the first component comprises epoxy resin, matrix asphalt, a diluent, a plasticizer, a toughening agent and a defoaming agent, and the second component comprises a modified amine curing agent and a polyether amine curing agent. Wherein the modified amine curing agent comprises bis (cyanoethyl) pentanediamine with the mass ratio of 80 (5-15): 3-6, bisphenol A diglycidyl ether, solvent B and catalyst B. The invention prepares the bio-based 1, 5-pentanediamine into the bis (cyanoethyl) pentanediamine by cyanoethylation, and then forms an amine-phenol grafting structure by dehydration condensation or nucleophilic substitution reaction under catalysis of primary amino of the bis (cyanoethyl) pentanediamine and phenolic hydroxyl of bisphenol A, so that the cured epoxy asphalt has higher toughness, and the compatibility and the reactivity of a curing agent and an asphalt-epoxy system can be improved.

Inventors

  • LI KAI
  • XU JIANHUI
  • WANG LINGYU
  • HAO ZENGHENG
  • HUANG HAO
  • WANG JIE
  • LIU PAN
  • PENG CHONG
  • CHEN SHIQI

Assignees

  • 招商智翔道路科技(重庆)有限公司
  • 招商局重庆交通科研设计院有限公司

Dates

Publication Date
20260505
Application Date
20260127

Claims (10)

  1. 1. The bio-based epoxy resin modified asphalt is characterized by comprising a first component and a second component, wherein the first component comprises epoxy resin, matrix asphalt, a diluent, a plasticizer, a toughening agent and a defoaming agent, and the second component comprises a modified amine curing agent and a polyether amine curing agent.
  2. 2. The bio-based epoxy resin modified asphalt according to claim 1, wherein the first component comprises, by mass, 40-60 parts of epoxy resin, 40-60 parts of matrix asphalt, 5-10 parts of diluent, 2-5 parts of plasticizer, 10-20 parts of toughening agent and 0.1-0.5 part of defoamer.
  3. 3. The bio-based epoxy resin modified asphalt according to claim 2, wherein the epoxy resin in the first component is one or more of E-44, E-51 and E-827, the diluent is at least one of allyl glycidyl ether and C12-14 fatty glycidyl ether, the plasticizer is at least one of dioctyl phthalate and triethyl phosphate, the toughening agent is at least one of LCS-220 liquid carboxyl terminated nitrile rubber and polymethyl methacrylate, and the defoamer is at least one of 1, 2-propanediol and tributyl phosphate.
  4. 4. The bio-based epoxy resin modified asphalt according to claim 3, wherein the first component is obtained by heating the formulated amount of the matrix asphalt to 100-120 ℃, adding the epoxy resin, the diluent, the plasticizer and the toughening agent, stirring for 30-60min to uniformly disperse, cooling to 60 ℃ or below, adding the antifoaming agent, and stirring for 15-45min to obtain the first component.
  5. 5. The bio-based epoxy resin modified asphalt according to claim 1, wherein the bis (cyanoethyl) pentanediamine is prepared by the following method: 1) Uniformly mixing bio-based 1, 5-pentanediamine and a solvent A according to the formula requirement, and cooling to 0-5 ℃ in an ice bath; 2) Slowly dropwise adding acrylonitrile under stirring, controlling the temperature to be less than or equal to 10 ℃ in the dropwise adding process, heating to 25-40 ℃ after the dropwise adding is finished, adding a catalyst A, and reacting for 2-4 hours; 3) Solvent A and excess acrylonitrile were distilled off under reduced pressure to give bis (cyanoethyl) pentyenediamine as a pale yellow viscous liquid.
  6. 6. The biobased epoxy resin modified asphalt of claim 5, wherein said asphalt is The mass ratio of the bio-based 1, 5-pentanediamine, the acrylonitrile, the solvent A and the catalyst A is 100:50-150:200-400:1.5-4.
  7. 7. The bio-based epoxy resin modified asphalt according to claim 6, wherein the bio-based 1, 5-pentanediamine is lysine in renewable resources and is produced by microbial dehydroxylation, the solvent a is one or more of methanol, ethanol or isopropanol, and the catalyst a is one or more of sodium hydroxide aqueous solution, potassium hydroxide aqueous solution, triethylamine, DBU, TEBA.
  8. 8. The bio-based epoxy resin modified asphalt of claim 6, wherein the modified amine curing agent comprises bis (cyanoethyl) pentanediamine, bisphenol a diglycidyl ether, solvent B, and catalyst B in a mass ratio of 80 (5-15): (3-6): (3-6); Wherein the solvent B is one or more of anhydrous DMF, anhydrous DMSO and THF; The catalyst B is at least one of 4-Dimethylaminopyridine (DMAP) and Triethylamine (TEA).
  9. 9. The bio-based epoxy resin modified asphalt of claim 8, wherein the second component is prepared by: according to the formula requirement, under the protection of nitrogen, bis (cyanoethyl) pentanediamine and bisphenol A diglycidyl ether are uniformly mixed, a solvent B is added, the mixture is uniformly stirred and mixed, a catalyst B is added, the mixture is stirred and reacted for 2-3 hours at 60-80 ℃ to obtain a modified amine curing agent, after the modified amine curing agent is cooled to room temperature, a polyether amine curing agent is added, the mass ratio of the modified amine curing agent to the polyether amine curing agent is (2-4): 1, and the mixture is uniformly stirred and mixed to obtain a second component.
  10. 10. A method for preparing the bio-based epoxy resin modified asphalt according to any one of claims 1 to 9, comprising the steps of: mixing the first component and the second component according to the mass ratio of (4-6): 1, and fully stirring and uniformly mixing at normal temperature to obtain the bio-based epoxy asphalt.

Description

Bio-based epoxy resin modified asphalt and preparation method thereof Technical Field The invention belongs to the technical field of steel bridge deck pavement materials, and particularly relates to bio-based epoxy resin modified asphalt and a preparation method thereof. Background Traffic is a basic, lead, strategic industry. However, in the face of traffic construction under different environments, many pain and difficulty are needed to be solved, for example, the problems that the high-low temperature performance of materials cannot be considered in paving a steel bridge deck, the elastic modulus difference between the materials and the steel bridge deck is overlarge and the like exist. The airport runway pavement has the special problems that the airplane take-off and landing impact load acts repeatedly, and hydrocarbon solvents in the aviation oil dissolve asphaltene to corrode the pavement and the like. In heavy-duty areas such as ports and mining areas, traditional asphalt is prone to structural rutting. In the high-cold or high-temperature area, the problems of insufficient high-low temperature performance and the like of the traditional material exist. In face of these pain difficulties, epoxy asphalt provides a new solution. The epoxy resin and the curing agent are subjected to ring-opening polymerization to form a compact cross-linking network, the bond energy of the covalent bond network is far greater than Van der Waals force among asphalt molecules, the epoxy resin provides a rigid framework, the asphalt filled network blank endows toughness, the cross-linking network maintains elastic modulus at high temperature, resists plastic deformation, the asphalt phase delays embrittlement at low temperature, and meanwhile, the compact cross-linking network blocks liquid permeation to enable the asphalt phase to have chemical corrosion resistance. Therefore, the epoxy asphalt has the remarkable advantages of high strength, good durability, excellent high-low temperature performance, strong fatigue resistance and the like. The country proposes the "2030 carbon arrival peak, 2060 carbon neutralization" goal in 2020, and incorporates the national strategy. The transportation industry is an important field of emission reduction as a high-energy-consumption industry. Under the background of a 'double carbon' target, the country has pushed a series of low-carbon green environmental protection policies and technical requirements in the road pavement field, and covers the aspects of material innovation, construction process, solid waste utilization, full life cycle management and the like. The carbon emission of the epoxy asphalt mainly comes from raw material production, construction process and full life cycle maintenance. The synthesis of epoxy resin depends on petrochemical industry, a large amount of carbon dioxide is discharged from raw material exploitation to process synthesis, high temperature is required in asphalt modification and construction stages, and energy consumption is increased. Although the characteristics of epoxy asphalt long-life surfaces can offset part of the image to the environment, the carbon emission intensity is 1.5-2 times higher than that of common asphalt due to the high performance requirement. It is therefore necessary to reduce the carbon emissions of epoxy asphalt. The raw materials of the biological base material are corn, sugarcane, cellulose and the like, and the biological base material has the advantages of complex carbon footprint, short growth period, low production energy consumption, degradability and the like, and is a core path for realizing the 'double carbon' target. Pentanediamine is an aliphatic diamine, which can undergo a crosslinking reaction with an epoxy group when used as an epoxy resin curing agent to form a three-dimensional network structure with excellent mechanical properties and chemical resistance. The method has the advantages that the method can be used for extracting the pentamethylene diamine through petroleum base, and biological materials such as corn, sugarcane, straw, rice husk and the like can be used for extracting the pentamethylene diamine, the bio-base extracted pentamethylene diamine is a green chemical produced through biological fermentation or enzyme catalysis, the structure of the bio-base pentamethylene diamine is completely consistent with that of the petroleum base pentamethylene diamine, the bio-base pentamethylene diamine has the characteristics of degradability, raw material sustainability, low production energy consumption and the like, and carbon emission in the whole life cycle is reduced by 50% -60% compared with that in a petroleum-based process, so that the bio-base pentamethylene diamine is a key substitute for carbon neutralization in petrochemical industry, and plays an important role in a double-carbon target and a global sustainable development agenda. In terms of process, cold mix bio-based epoxy asphalt is g