Liquefied reaction type petroleum pitch having long-term room temperature storage stability

Abstract

The application discloses the technical field of petroleum pitch and relates to a liquefied reaction type petroleum pitch with long-term normal-temperature storage stability. The application prepares a triblock copolymer as a dispersant of SBS modified petroleum pitch through ATRP polymerization reaction, the triblock copolymer has low and controllable molecular weight and uniform molecular weight distribution, intermolecular entanglement is not easy to occur, the sulfonic acid group can endow SBS with electric property, reduce the electrostatic attraction between SBS, and perform electric neutralization with sodium, potassium and other cations to reduce the aggregation and deposition of SBS; the thiophene group has good compatibility with the PS segment in SBS and the aromatic compounds and heterocyclic compounds in the pitch, is helpful to the dispersion of SBS, and plays an antioxidation role; the terpene hydrocarbon group is helpful to the shearing of SBS into smaller particle sizes, the swelling degree of SBS is more thorough, and the formed crosslinked network structure is more dense and uniform. The modified petroleum pitch has good compatibility of components, good anti-rutting capacity, strong bonding capacity, excellent high and low temperature performance, and can be stored for a long time at normal temperature.

Description

Technical Field

[0001] This invention belongs to the field of petroleum asphalt technology, and particularly relates to a liquefied reactive petroleum asphalt with long-term room temperature storage stability. Background Technology

[0002] With the continuous development of the transportation industry, the problems of vehicle size and overloading are becoming increasingly serious. At the same time, extreme weather events pose challenges to traditional road paving materials like base asphalt. Due to its high temperature sensitivity and poor high-temperature stability, base asphalt suffers from poor pavement performance, resulting in rutting, cracking, potholes, and other defects that severely affect driving comfort and safety. To improve the road performance of asphalt, polymer modifiers are often used to modify petroleum asphalt. Modified asphalt is prepared by uniformly dispersing the polymer modifier into the base asphalt in a molten state through methods such as mechanical shearing, mother liquor dispersion, or colloidal grinding. This method can improve the asphalt's high-temperature rutting resistance, low-temperature cracking resistance, fatigue resistance, and aging resistance, thereby increasing the service life and performance of the pavement.

[0003] Among polymer modifiers for road petroleum asphalt, thermoplastic elastomer styrene-butadiene-styrene block copolymer (SBS) is the most widely used. SBS is a thermoplastic elastomer that possesses both the physical and mechanical properties of plastics and rubber. It has good compatibility with asphalt, and the addition of SBS can significantly improve the temperature stability and durability of petroleum asphalt, enabling it to meet corresponding high and low temperature performance requirements. However, during long-term storage or transportation, SBS is easily segregated from the asphalt due to external factors such as oxygen, light, and temperature, undergoing oxidation and aging reactions, leading to a decrease in the stability of the modified asphalt. Therefore, long-term room temperature storage stability is crucial for SBS-modified petroleum asphalt. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing SBS-modified petroleum asphalt where SBS easily segregates from the asphalt during long-term storage or transportation, leading to oxidation and aging reactions and a decrease in the stability of the modified asphalt, this invention prepares a triblock copolymer via ATRP polymerization as a dispersant for SBS-modified petroleum asphalt, thereby enabling the petroleum asphalt to have long-term stability during room temperature storage.

[0005] To achieve the above objectives, the following technical solution is adopted: This invention provides a liquefied reactive petroleum asphalt with long-term room temperature storage stability, wherein the petroleum asphalt comprises the following components in parts by weight: 100-120 parts of base asphalt, 10-15 parts of SBS, 8-12 parts of dispersant, 0.5-1.5 parts of stabilizer, and 4-8 parts of antioxidant.

[0006] Furthermore, the preparation of the dispersant includes the following steps:

[0007] (1) After the reaction apparatus is purged with nitrogen, 30-40 parts of sulfonate monomer, 50-80 parts of water, 0.05-0.2 parts of surfactant, 0.1-0.5 parts of ligand, and 0.05-0.1 parts of catalyst are added under a nitrogen flow. The mixture is stirred and heated to 50-70°C. Then, 0.01-0.05 parts of initiator are added dropwise to initiate the reaction. After the addition is complete, the reaction continues for 2-4 hours to obtain reaction solution A.

[0008] (2) Add 10-20 parts of thiophene monomer to 40-50 parts of anhydrous ethanol, add 2% sodium hydroxide solution dropwise to pH=9-11, add water twice the volume of ethanol for dilution to obtain thiophene solution, add the thiophene solution dropwise to reaction solution A under nitrogen gas flow, heat to 80-90℃, react for 2-3h to obtain reaction solution B;

[0009] (3) Dissolve 10-15 parts of terpene monomer in 40-50 parts of ethanol, add the resulting solution dropwise to the reaction solution B under a nitrogen gas flow, react at 80-90℃ for 2-3 hours, then cool naturally to room temperature, concentrate the solution to one-quarter volume and filter to obtain the dispersant.

[0010] Further, the sulfonate monomer comprises the following components in parts by weight: 50-60 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 30-45 parts of sodium 2-methacrylic acid-2-ethanesulfonate, and 25-40 parts of sodium 2-acrylamido-2-methylpropanesulfonate.

[0011] Further, the thiophene monomer comprises the following components in parts by weight: 40-50 parts of 2-allylthiophene, 40-50 parts of 2-vinylthiophene, and 30-40 parts of 2-methyl-5-vinylthiophene.

[0012] Further, the terpene monomer comprises the following components in parts by weight: 40-50 parts of β-pinene and 20-30 parts of 1-methyl-4-(1-methylvinyl)cyclohexanol.

[0013] Furthermore, the surfactant is one of guar hydroxypropyltrimethylammonium chloride, trimethyloctadecylammonium chloride, and cocamidopropyl PG-dimethylammonium chloride.

[0014] Further, the ligand is one of N'-[2-(dimethylamino)ethyl]-N,N-dimethylethylenediamine, N,N-dimethyl-N'-ethylethylenediamine, N-ethyl-N,N'-dimethyl-1,2-ethylenediamine, and N,N,N',N'-tetramethylethylenediamine.

[0015] Furthermore, the catalyst is one of cupric chloride, cuprous chloride, ferric chloride, zinc chloride, cuprous bromide, cupric bromide, ferric bromide, and zinc bromide.

[0016] Furthermore, the initiator is one of propargyl bromoisobutyrate and ethyl 2-bromoisobutyrate.

[0017] Furthermore, the base asphalt is one of No. 70, No. 90, or No. 110 petroleum asphalt.

[0018] Furthermore, the SBS is either a linear or a star-shaped SBS.

[0019] Furthermore, the stabilizer is one of di-sec-butyl disulfide, diphenyl disulfide, and diallyl disulfide.

[0020] Furthermore, the antioxidant is one of 4,4-stilbene diphenylamine, N,N-di(2-naphthyl)-p-phenylenediamine, and N,N-diphenyl-p-phenylenediamine.

[0021] Furthermore, the petroleum asphalt is prepared through the following steps:

[0022] (1) Heat the base asphalt to 165°C, add SBS, mix and stir for 15-30 min, then add the dispersant, and heat to 180-185°C at a heating rate of 2°C / min to obtain mixture one;

[0023] (2) The mixture one is placed in a shear homogenizing emulsifier for shearing. At this time, the stabilizer and antioxidant are added. The shearing time is 40-50 min, the shearing temperature is 170-190℃, and the shearing rate is 5000-8000 r / min to obtain the mixture two.

[0024] (3) Place the mixture into an oven at 150-160℃ for 40-60 minutes to obtain liquefied reactive petroleum asphalt.

[0025] The beneficial effects of this invention are as follows:

[0026] (1) This invention addresses the problem of segregation, agglomeration, deposition, and accelerated aging of SBS-modified petroleum asphalt during long-term storage. A triblock copolymer is prepared as a dispersant for SBS in petroleum asphalt. The sulfonic acid group imparts charge to the SBS particles, reducing electrostatic attraction between them and minimizing agglomeration. The sulfonate anion neutralizes the sodium and potassium cations in the petroleum asphalt at the molecular level, further reducing agglomeration and deposition of SBS particles and maintaining their dispersed state. The thiophene group in the thiophene monomer is an aromatic heterocyclic compound that reacts with the PS segments in SBS and the petroleum asphalt. The aromatic and heterocyclic compounds in the SBS have good compatibility, which helps the SBS particles disperse in petroleum asphalt. The thiophene group is a reducing group and also plays a role in preventing oxidation and aging of petroleum asphalt. The terpene group helps the SBS particles to be sheared into smaller particle sizes during the shearing process. The smaller SBS particles swell more thoroughly during the adsorption process with the light components of petroleum asphalt, so the cross-linked network structure formed is more dense and uniform. The terpene group increases the compatibility, adhesion and dispersion stability between SBS particles and petroleum asphalt, and improves the ductility, room temperature storage stability and anti-aging properties of SBS modified petroleum asphalt.

[0027] (2) When the molecular weight of the dispersant is high, it is easy to reduce the viscosity, fluidity, stability and anti-aging properties of SBS modified asphalt, making it easy for SBS to separate and precipitate during storage and use. However, the dispersant prepared by the present invention through ATRP polymerization reaction has a low and controllable molecular weight and uniform molecular weight distribution. The dispersant, SBS and petroleum asphalt linear segments are not easy to entangle, reducing the aggregation and deposition of SBS, enhancing the storage stability of asphalt and extending the service life of asphalt.

[0028] (3) The modified petroleum asphalt prepared by this invention has good compatibility among its components, good rutting resistance, strong adhesion, excellent high and low temperature performance, and long-term room temperature storage stability. Attached Figure Description

[0029] Figure 1 The images show the softening point detection results of various embodiments and comparative examples of the present invention.

[0030] Figure 2 The diagram shows the ductility test results of various embodiments and comparative examples of the present invention;

[0031] Figure 3 The figures show the detection results of the changes in needle penetration before and after aging in various embodiments and comparative examples of the present invention.

[0032] Figure 4 The graph shows the results of the number-average molecular weight changes before and after aging in various embodiments and comparative examples of the present invention.

[0033] Figure 5 The graph shows the results of the weight-average molecular weight change before and after aging in various embodiments and comparative examples of the present invention.

[0034] Figure 6 The graph shows the detection results of changes in molecular weight distribution coefficient before and after aging in various embodiments and comparative examples of the present invention;

[0035] Figure 7 The figures show the results of crystallinity changes before and after aging in various embodiments and comparative examples of the present invention.

[0036] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be applied to this invention. The preferred embodiments and materials described herein are for illustrative purposes only and do not limit the scope of this application.

[0039] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the experimental materials used in the following examples are all purchased from commercial channels.

[0040] Example 1

[0041] A liquefied reactive petroleum asphalt with long-term room temperature storage stability

[0042] The petroleum asphalt comprises the following components in parts by weight: 100 parts base asphalt, 10 parts SBS, 8 parts dispersant, 0.5 parts stabilizer, and 4 parts antioxidant.

[0043] The preparation of the dispersant includes the following steps:

[0044] (1) After the reaction apparatus is purged with nitrogen, 30 parts of sulfonate monomer, 50 parts of water, 0.05 parts of surfactant, 0.1 parts of ligand and 0.05 parts of catalyst are added under nitrogen flow. The mixture is stirred and heated to 50°C. Then, 0.01 parts of initiator are added dropwise to initiate the reaction. After the addition is complete, the reaction continues for 2 hours to obtain reaction solution A.

[0045] (2) Add 10 parts of thiophene monomer to 40 parts of anhydrous ethanol, add 2% sodium hydroxide solution dropwise until pH=9, add water twice the volume of ethanol for dilution to obtain thiophene solution, add the thiophene solution dropwise to reaction solution A under nitrogen gas flow, heat to 80℃, react for 2h to obtain reaction solution B;

[0046] (3) Dissolve 10 parts of terpene monomer in 40 parts of ethanol, add the resulting solution dropwise to the reaction solution B under a nitrogen gas flow, react at 80°C for 2 hours, then cool naturally to room temperature, concentrate the solution to one-quarter volume and filter to obtain the dispersant.

[0047] The sulfonate monomer comprises the following components in parts by weight: 50 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 30 parts of sodium 2-methacrylic acid-2-ethanesulfonate, and 25 parts of sodium 2-acrylamido-2-methylpropanesulfonate; the thiophene monomer comprises the following components in parts by weight: 40 parts of 2-allylthiophene, 40 parts of 2-vinylthiophene, and 30 parts of 2-methyl-5-vinylthiophene; the terpene monomer comprises the following components in parts by weight: 40 parts of β-pinene and 20 parts of 1-methyl-4-(1-methylvinyl)cyclohexanol.

[0048] The surfactant is guar hydroxypropyltrimethylammonium chloride; the ligand is N'-[2-(dimethylamino)ethyl]-N,N-dimethylethylenediamine; the catalyst is copper chloride; the initiator is propargyl bromide isobutyrate; the matrix bitumen is No. 70 petroleum bitumen; the SBS is linear SBS; the stabilizer is di-sec-butyl disulfide; and the antioxidant is 4,4-stilbene diphenylamine.

[0049] The petroleum asphalt is prepared through the following steps:

[0050] (1) Heat the base asphalt to 165°C, add SBS, mix and stir for 15 min, then add the dispersant, and heat to 180°C at a heating rate of 2°C / min to obtain mixture one;

[0051] (2) The mixture one is placed in a shear homogenizing emulsifier for shearing. At this time, the stabilizer and antioxidant are added. The shearing time is 40 min, the shearing temperature is 170℃, and the shearing rate is 5000 r / min to obtain mixture two.

[0052] (3) The mixture is placed in an oven at 150°C for 40 minutes to obtain liquefied reactive petroleum asphalt.

[0053] Example 2

[0054] A liquefied reactive petroleum asphalt with long-term room temperature storage stability

[0055] The petroleum asphalt comprises the following components in parts by weight: 120 parts base asphalt, 15 parts SBS, 12 parts dispersant, 1.5 parts stabilizer, and 8 parts antioxidant.

[0056] The preparation of the dispersant includes the following steps:

[0057] (1) After the reaction apparatus is purged with nitrogen, 40 parts of sulfonate monomer, 80 parts of water, 0.2 parts of surfactant, 0.5 parts of ligand and 0.1 parts of catalyst are added under nitrogen flow. The mixture is stirred and heated to 70°C. Then, 0.05 parts of initiator are added dropwise to initiate the reaction. After the addition is complete, the reaction continues for 4 hours to obtain reaction solution A.

[0058] (2) Add 20 parts of thiophene monomer to 50 parts of anhydrous ethanol, add 2% sodium hydroxide solution dropwise until pH=11, add water twice the volume of ethanol for dilution to obtain thiophene solution, add the thiophene solution dropwise to reaction solution A under nitrogen gas flow, heat to 90℃, react for 3h to obtain reaction solution B;

[0059] (3) Dissolve 15 parts of terpene monomer in 50 parts of ethanol, add the resulting solution dropwise to the reaction solution B under a nitrogen gas flow, react at 90°C for 3 hours, then cool naturally to room temperature, concentrate the solution to one-quarter volume and filter to obtain the dispersant.

[0060] The sulfonate monomer comprises the following components in parts by weight: 60 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 45 parts of sodium 2-methacrylic acid-2-ethanesulfonate, and 40 parts of sodium 2-acrylamido-2-methylpropanesulfonate; the thiophene monomer comprises the following components in parts by weight: 50 parts of 2-allylthiophene, 50 parts of 2-vinylthiophene, and 40 parts of 2-methyl-5-vinylthiophene; the terpene monomer comprises the following components in parts by weight: 50 parts of β-pinene and 30 parts of 1-methyl-4-(1-methylvinyl)cyclohexanol.

[0061] The surfactant is trimethyloctadecylammonium chloride; the ligand is N,N-dimethyl-N'-ethylethylenediamine; the catalyst is cuprous chloride; the initiator is propargyl bromide isobutyrate; the matrix asphalt is No. 90 petroleum asphalt; the SBS is star-shaped SBS; the stabilizer is diphenyl disulfide; and the antioxidant is N,N-di(2-naphthyl)-p-phenylenediamine.

[0062] The petroleum asphalt is prepared through the following steps:

[0063] (1) Heat the base asphalt to 165°C, add SBS, mix and stir for 30 min, add dispersant, and heat to 185°C at a heating rate of 2°C / min to obtain mixture one;

[0064] (2) The mixture one is placed in a shear homogenizing emulsifier for shearing. At this time, stabilizers and antioxidants are added. The shearing time is 50 min, the shearing temperature is 190℃, and the shearing rate is 8000 r / min to obtain mixture two.

[0065] (3) The mixture is placed in an oven at 160°C for 60 minutes to obtain liquefied reactive petroleum asphalt.

[0066] Example 3

[0067] A liquefied reactive petroleum asphalt with long-term room temperature storage stability

[0068] The petroleum asphalt comprises the following components in parts by weight: 110 parts base asphalt, 12 parts SBS, 10 parts dispersant, 1 part stabilizer, and 6 parts antioxidant.

[0069] The preparation of the dispersant includes the following steps:

[0070] (1) After the reaction apparatus is purged with nitrogen, 35 parts of sulfonate monomer, 60 parts of water, 0.1 parts of surfactant, 0.25 parts of ligand and 0.08 parts of catalyst are added under nitrogen flow. The mixture is stirred and heated to 60°C. Then, 0.04 parts of initiator are added dropwise to initiate the reaction. After the addition is complete, the reaction continues for 3 hours to obtain reaction solution A.

[0071] (2) Add 15 parts of thiophene monomer to 45 parts of anhydrous ethanol, add 2% sodium hydroxide solution dropwise until pH=10, add water twice the volume of ethanol for dilution, and obtain thiophene solution. Add the thiophene solution dropwise to reaction solution A under nitrogen gas flow, heat to 85℃, react for 2.5h, and obtain reaction solution B.

[0072] (3) Dissolve 12 parts of terpene monomer in 45 parts of ethanol, add the resulting solution dropwise to the reaction solution B under a nitrogen gas flow, react at 85°C for 2.5 h, then cool naturally to room temperature, concentrate the solution to one-quarter volume and filter to obtain the dispersant.

[0073] The sulfonate monomer comprises the following components in parts by weight: 55 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 40 parts of sodium 2-methacrylic acid-2-ethanesulfonate, and 35 parts of sodium 2-acrylamido-2-methylpropanesulfonate; the thiophene monomer comprises the following components in parts by weight: 45 parts of 2-allylthiophene, 45 parts of 2-vinylthiophene, and 35 parts of 2-methyl-5-vinylthiophene; the terpene monomer comprises the following components in parts by weight: 45 parts of β-pinene and 25 parts of 1-methyl-4-(1-methylvinyl)cyclohexanol.

[0074] The surfactant is cocamidopropyl PG-dimethylammonium chloride; the ligand is N-ethyl-N,N'-dimethyl-1,2-ethylenediamine; the catalyst is cuprous bromide; the initiator is ethyl 2-bromoisobutyrate; the matrix asphalt is No. 110 petroleum asphalt; the SBS is linear SBS; the stabilizer is diallyl disulfide; and the antioxidant is N,N-diphenyl-p-phenylenediamine.

[0075] The petroleum asphalt is prepared through the following steps:

[0076] (1) Heat the base asphalt to 165℃, add SBS, mix and stir for 25 min, then add the dispersant, and heat to 182℃ at a heating rate of 2℃ / min to obtain mixture one;

[0077] (2) The mixture one is placed in a shear homogenizing emulsifier for shearing. At this time, stabilizers and antioxidants are added. The shearing time is 45 min, the shearing temperature is 180℃, and the shearing rate is 6000 r / min to obtain mixture two.

[0078] (3) The mixture is placed in an oven at 155°C for 50 minutes to obtain liquefied reactive petroleum asphalt.

[0079] Example 4

[0080] A liquefied reactive petroleum asphalt with long-term room temperature storage stability

[0081] The petroleum asphalt comprises the following components in parts by weight: 100 parts base asphalt, 11 parts SBS, 10 parts dispersant, 1.2 parts stabilizer, and 6 parts antioxidant.

[0082] The preparation of the dispersant includes the following steps:

[0083] (1) After the reaction apparatus is purged with nitrogen, 32 parts of sulfonate monomer, 70 parts of water, 0.05 parts of surfactant, 0.25 parts of ligand and 0.1 parts of catalyst are added under nitrogen flow. The mixture is stirred and heated to 60°C. Then, 0.03 parts of initiator are added dropwise to initiate the reaction. After the addition is complete, the reaction continues for 2 hours to obtain reaction solution A.

[0084] (2) Add 48 phen monomer to 48 anhydrous ethanol, add 2% sodium hydroxide solution dropwise until pH=9, add water twice the volume of ethanol for dilution, and obtain thiophene solution. Add the thiophene solution dropwise to reaction solution A under nitrogen gas flow, heat to 80°C and react for 2.5 minutes to reaction solution B.

[0085] (3) Dissolve 12 terpenoid monomers in 45% ethanol, add the resulting solution dropwise to the reaction solution B under a nitrogen gas flow, react at 80°C for 2 hours, then cool naturally to room temperature, concentrate the solution to one-quarter volume and filter to obtain the dispersant.

[0086] The sulfonate monomer comprises the following components in parts by weight: 50 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 40 parts of sodium 2-methacrylic acid-2-ethanesulfonate, and 35 parts of sodium 2-acrylamido-2-methylpropanesulfonate; the thiophene monomer comprises the following components in parts by weight: 40 parts of 2-allylthiophene, 50 parts of 2-vinylthiophene, and 35 parts of 2-methyl-5-vinylthiophene; the terpene monomer comprises the following components in parts by weight: 46 parts of β-pinene and 28 parts of 1-methyl-4-(1-methylvinyl)cyclohexanol.

[0087] The surfactant is trimethyloctadecylammonium chloride; the ligand is N,N,N',N'-tetramethylethylenediamine; the catalyst is copper bromide; the initiator is ethyl 2-bromoisobutyrate; the matrix asphalt is No. 70 petroleum asphalt; the SBS is star-shaped SBS; the stabilizer is di-sec-butyl disulfide; and the antioxidant is N,N-di(2-naphthyl)-p-phenylenediamine.

[0088] The petroleum asphalt is prepared through the following steps:

[0089] (1) Heat the base asphalt to 165℃, add SBS, mix and stir for 25 min, then add the dispersant, and heat to 180℃ at a heating rate of 2℃ / min to obtain mixture one;

[0090] (2) The mixture one is placed in a shear homogenizing emulsifier for shearing. At this time, stabilizers and antioxidants are added. The shearing time is 44 min, the shearing temperature is 180℃, and the shearing rate is 5500 r / min to obtain mixture two.

[0091] (3) The mixture is placed in an oven at 155°C for 55 minutes to obtain liquefied reactive petroleum asphalt.

[0092] Comparative Example 1

[0093] A liquefied reactive petroleum asphalt with long-term room temperature storage stability

[0094] The difference between this comparative example and Example 1 is that the petroleum asphalt does not contain a dispersant, but is replaced by an equal amount of base asphalt. The remaining components, component contents, and preparation process steps are the same as in Example 1.

[0095] Results Analysis

[0096] The samples prepared according to the "Test Methods for Concrete and Asphalt Mixtures in Highway Engineering" (T0661-2011) were used to test the softening point, ductility, and changes in penetration, molecular weight, and crystallinity of petroleum asphalt before and after aging.

[0097] The softening point test was conducted according to T0606-2011, using a SYD-2806C asphalt softening point tester. The softening point test results are shown below. Figure 1 .

[0098] The ductility test was conducted according to T0605-2011, using the SY intelligent low-temperature asphalt ductility tester. The test temperature was 10℃, and the tensile rate was 5cm / min. The ductility test results are shown below. Figure 2 .

[0099] The penetration test was conducted according to T0604-2011 using an SZR5 asphalt penetration tester. The results of the penetration change before and after aging are shown in [reference needed]. Figure 3 .

[0100] Molecular weight changes were determined using a GPC109 rubber molecular weight distribution gel electrophoresis instrument, including number-average molecular weight, weight-average molecular weight, and molecular weight distribution coefficient. The results of number-average molecular weight, weight-average molecular weight, and molecular weight distribution coefficient before and after aging are shown in the figures below. Figure 4 , Figure 5 , Figure 6 .

[0101] The crystallinity change was measured using X-ray diffraction (XRD) under the following conditions: CuKα (λ = 0.154 nm), tube current 30 mA, tube voltage 30 kV. The results of the crystallinity change before and after aging are shown in [reference needed]. Figure 7 .

[0102] The aging tests above were divided into short-term aging and long-term aging. The short-term aging conditions were a temperature of 135℃ in a hot air oven for 8 hours, while the long-term aging conditions were a temperature of 45℃ in a hot air oven for 10 days.

[0103] pass Figure 1-3 It can be seen that the softening point is increased. The petroleum asphalt prepared in Examples 1-4 has a high softening point, high ductility, and a small decrease in asphalt penetration after aging. This indicates that the dispersant prepared in this invention effectively improves the heat resistance, wear resistance, crack resistance, and adhesion of petroleum asphalt, enhances the plasticity of petroleum asphalt, enabling it to withstand large deformations without damage, and at the same time enhances its resistance to rutting, fatigue, and aging.

[0104] pass Figure 4-7It can be seen that the average molecular weight and molecular weight distribution coefficient of the petroleum asphalt prepared in Examples 1-4 did not change significantly, while the average molecular weight of the petroleum asphalt without dispersant changed greatly after aging, the molecular weight distribution became wider and the molecular weight distribution became uneven. At the same time, the change in crystallinity of the petroleum asphalt prepared in Examples 1-4 after aging was less than that of the comparative example, indicating that the addition of dispersant enabled the petroleum asphalt to obtain excellent thermal stability.

[0105] In summary, the triblock copolymer dispersant prepared in this invention is applied to petroleum asphalt, which improves the petroleum asphalt's resistance to rutting, adhesion, high and low temperature performance, and exhibits excellent stability during long-term storage at room temperature.

[0106] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0107] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention. The actual application is not limited to this. In conclusion, if those skilled in the art are inspired by this description and design similar methods and embodiments without departing from the spirit of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A liquefied reactive petroleum asphalt with long-term room temperature storage stability, characterized in that: The petroleum asphalt comprises the following components in parts by weight: 100-120 parts base asphalt, 10-15 parts SBS, 8-12 parts dispersant, 0.5-1.5 parts stabilizer, and 4-8 parts antioxidant. The preparation of the dispersant includes the following steps: (1) After replacing the reaction apparatus with nitrogen, add 30-40 parts of sulfonate monomer, 50-80 parts of water, 0.05-0.2 parts of surfactant, 0.1-0.5 parts of ligand, and 0.05-0.1 parts of catalyst under a nitrogen flow. Stir and heat to 50-70℃, then add 0.01-0.05 parts of initiator dropwise to initiate the reaction. After the dropwise addition is complete, continue the reaction for 2-4 hours to obtain reaction solution A. (2) Add 10-20 parts of thiophene monomer to 40-50 parts of anhydrous ethanol, add 2% sodium hydroxide solution dropwise to pH=9-11, add water twice the volume of ethanol for dilution to obtain thiophene solution, add the thiophene solution dropwise to the reaction solution A under nitrogen gas flow, heat to 80-90℃, react for 2-3h to obtain reaction solution B; (3) Dissolve 10-15 parts of terpene monomer in 40-50 parts of ethanol, add the resulting solution dropwise to the reaction solution B under a nitrogen gas flow, react at 80-90℃ for 2-3 hours, then cool naturally to room temperature, concentrate the solution to one-quarter volume and filter to obtain the dispersant; The sulfonate monomer comprises the following components in parts by weight: 50-60 parts of sodium 2-acrylamido-2-methylpropanesulfonate, 30-45 parts of sodium 2-methacrylic acid-2-ethanesulfonate, and 25-40 parts of sodium 2-acrylamido-2-methylpropanesulfonate; the thiophene monomer comprises the following components in parts by weight: 40-50 parts of 2-allylthiophene, 40-50 parts of 2-vinylthiophene, and 30-40 parts of 2-methyl-5-vinylthiophene; the terpene monomer comprises the following components in parts by weight: 40-50 parts of β-pinene and 20-30 parts of 1-methyl-4-(1-methylvinyl)cyclohexanol.

2. The liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 1, characterized in that: The surfactant is one of guar hydroxypropyltrimethylammonium chloride, trimethyloctadecylammonium chloride, and cocamidopropyl PG-dimethylammonium chloride.

3. The liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 2, characterized in that: The ligand is one of N'-[2-(dimethylamino)ethyl]-N,N-dimethylethylenediamine, N,N-dimethyl-N'-ethylethylenediamine, N-ethyl-N,N'-dimethyl-1,2-ethylenediamine, and N,N,N',N'-tetramethylethylenediamine.

4. The liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 3, characterized in that: The catalyst is one of copper chloride, cuprous chloride, ferric chloride, zinc chloride, cuprous bromide, copper bromide, ferric bromide, and zinc bromide; the initiator is one of propargyl bromoisobutyrate and ethyl 2-bromoisobutyrate.

5. A liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 4, characterized in that: The base asphalt is one of No. 70, No. 90, or No. 110 petroleum asphalt.

6. A liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 5, characterized in that: The SBS is either a linear or a star SBS.

7. A liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 6, characterized in that: The stabilizer is one of di-sec-butyl disulfide, diphenyl disulfide, and diallyl disulfide.

8. A liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 7, characterized in that: The antioxidant is one of 4,4-stilbene diphenylamine, N,N-di(2-naphthyl)-p-phenylenediamine, and N,N-diphenyl-p-phenylenediamine.

9. A liquefied reactive petroleum asphalt with long-term room temperature storage stability according to claim 8, characterized in that: The petroleum asphalt is prepared through the following steps: (1) Heat the base asphalt to 165°C, add SBS, mix and stir for 15-30 min, then add the dispersant, and heat to 180-185°C at a heating rate of 2°C / min to obtain mixture one; (2) The mixture one is placed in a shear homogenizing emulsifier for shearing. At this time, the stabilizer and antioxidant are added. The shearing time is 40-50 min, the shearing temperature is 170-190℃, and the shearing rate is 5000-8000 r / min to obtain the mixture two. (3) Place the mixture into an oven at 150-160℃ for 40-60 minutes to obtain liquefied reactive petroleum asphalt.

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