CN1733832A - Storage type SBS modified asphalt and its production method - Google Patents
Storage type SBS modified asphalt and its production method Download PDFInfo
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- CN1733832A CN1733832A CN 200410053771 CN200410053771A CN1733832A CN 1733832 A CN1733832 A CN 1733832A CN 200410053771 CN200410053771 CN 200410053771 CN 200410053771 A CN200410053771 A CN 200410053771A CN 1733832 A CN1733832 A CN 1733832A
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- Working-Up Tar And Pitch (AREA)
Abstract
The stored SBS modified asphalt comprises at least: 3~8% mether grain of modified asphalt with constituents and mass proportion of 60~90% SBS, 5~30% PE and 5~30% phase solvent, 90~95% basic asphalt, and 0.1~2% chemical stabilizer of polysulfide or peroxide. Wherein, extruding the SBS, PE and phase solvent on twin-screw extruder to granulate; mixing evenly the main constituents in the mixing stearing reaction kettle with speed 120~1440rpm for 20~60min at 150~170Deg to obtain modified asphalt for direct mixing with polymer. This invention needs short time, simple equipment and mild condition, and decreases the cost.
Description
Technical Field
The invention relates to the technical field of modified asphalt products and the technical field of related production methods thereof.
Background
The development of the polymer modified road asphalt is closely related to the development of the road transportation industry, harsh traffic conditions such as heavy load, overload, traffic flow and climate environment certainly cause the diseases of the road surface, and the research on improving the service performance of the asphalt concrete road surface becomes the urgent need of road construction.
The prior polymers commonly used for asphalt modification mainly comprise three types, namely thermoplastic elastomers such as SBS, SIS and the like, rubbers such as SBR, EPR or EPDM and the like, thermoplastic resins such as PE, EVA and the like, wherein in the total amount of the modified asphalt, SBS modification accounts for 40%, EVA modification accounts for 19%, EPDM modification accounts for 12%, and tire powder modification accounts for 9%.
In order to solve the problem of the dispersibility of polymers such as SBS in asphalt and obtain polymer/asphalt materials with uniform and stable performance, the compatibility of a polymer modifier and the asphalt is the key for determining the modification effect and the modified asphalt manufacturing process, so the key points of the polymer modified asphalt at home and abroad are to develop the modified asphalt manufacturing process and research the compatibility of a matrix asphalt/polymer system.
For example, the Chinese patent 'a high polymer solvent and a rubber asphalt modifier and a production method' with patent application number 93120020.2 is a modified asphalt technology, aiming at the problem that rubber solids such as SBR are difficult to be blended with asphalt, SBR is made into high-concentration latex, the latex is directly sprayed into a mixing pot to be mixed evenly in the process of preparing an asphalt mixture, a large amount of water is introduced into the method to influence the quality, water vapor evaporates to cause construction equipment to rust, the latex blocks a pipeline, the metering is inaccurate, the latex is frequently demulsified, and the quality problems of storage and transportation easily occur, the rubber asphalt matrix prepared by a solvent method cuts solid SBR blocks into asphalt matrixes which are sold in a commodity form, the solid content of the finished SBR modified asphalt matrixes is generally 20%, because the solvent in the production process is difficult to be completely recovered, the solvent below 5% generally remains in the matrixes, and the process is more complex when the solvent is used in engineering, the user manually cuts up the parent body in the solid form, puts the parent body into the hot asphalt according to the proportion, stirs or pumps the mixture until the mixture is uniform, generally needs 1 to 2 hours, carries on the second blending, needs the solvent recovery, the flow is long, the cost is high, the price is expensive in the preparation process, has the production safety problem, the light solvent influences the modified asphalt quality, when applying in the project, the parent body is difficult to cut and crush, the equipment investment of the second blending is high. For example, the Chinese patent 'road asphalt modified master batch and production method thereof' with the patent application number of 99122913.4 is a modified asphalt technology, SBS of 45-60%, asphalt of 35-50% and inorganic filler of 4-15% are adopted to prepare the master batch for modifying asphalt, and talcum powder, white carbon black and calcium carbonate inorganic filler are introduced into the modified asphalt to cause the modified asphalt to have smaller penetration degree and harder asphalt, which causes the asphalt construction difficulty and poor low-temperature toughness and extensibility, and simultaneously the modified asphalt is difficult to reach the index of the solubility of more than 99%, so that the practical engineering application is limited. For example, chinese patent No. 02116763, "a method for producing thermoplastic olefin polymer modified asphalt with good stability" is a modified asphalt technology, which aims at the present engineering use of more SBS or unvulcanized SBR rubber polymers as modifiers, and the modified asphalt must be produced by a colloid mill method and a high shear mixer. The modified asphalt is processed by adopting a colloid mill method and a high-speed shearing method, generally three stages of melting and swelling, dispersing and grinding and continuous development of a modifier are required, wherein the temperature of each stage is critical, for SBS and SBR, aromatic oil and light colloid components in the asphalt are absorbed in the melting and swelling stage, the aromatic oil and the light colloid components are dispersed and ground by the colloid mill, and the aromatic oil and the light colloid components enter a storage tank to be continuously stirred and further dissolved with the asphalt.
In addition, in order to make the storage type SBS modified asphalt suitable for factory production and long-term thermal storage, the SBS polymer and the like must be physically dispersed and uniformly mixed with the asphalt, chemically stable, and capable of preventing self-aggregation and phase separation, and the segregation phenomenon cannot occur, so that the canned SBS modified asphalt can be pulled to a construction site for asphalt concrete production and highway construction like heavy rubber asphalt, the construction operation requirements are met, the process step that the construction site needs to melt and mix the modified asphalt or the modifier with the matrix asphalt is avoided, the labor intensity of constructors is reduced, the working environment is improved, and meanwhile, the quality stability of the modified asphalt can be improved and maintained by using factory equipment.
Disclosure of Invention
The invention provides a storage type SBS modified asphalt aiming at the prior background technology, which utilizes a high molecular weight phase solvent to improve the intermiscibility of polymers such as SBS and the like and asphalt, the polymers and the asphalt can be directly mixed by common stirring and shearing, and simultaneously, a chemical stabilizer is added into master batch and matrix asphalt to ensure that heterogeneous chemical crosslinking is generated between the polymers and the asphalt, thereby greatly improving the stability of the modified asphalt and meeting the requirement of long-period thermal state storage.
The invention aims to solve another technical problem and provides a storage type SBS modified asphalt production method on the basis of the previous steps, which realizes the direct mixing of polymer and asphalt and has the advantages of short processing flow, simple equipment, mild process conditions, low investment and operation cost and the like.
The technical scheme adopted by the invention for solving the above-mentioned primary technical problems is as follows: a storage type SBS modified asphalt is characterized in that the storage type SBS modified asphalt is formed by evenly mixing 3-8% of SBS modified asphalt master batch, 90-95% of matrix asphalt and 0.1-2% of chemical stabilizer;
wherein,
the SBS modified asphalt master batch comprises the following components:
SBS 60～90％
PE 5～30％
5-30% of a phase solvent;
the chemical stabilizer is selected from polysulfide or peroxy compounds and compounds thereof;
the above percentages are mass percentages.
Advantageously, the polysulphide compound is dithiodimorpholine DTDM, or tetramethylthiuram disulphide TMTD, tetraethylthiuram disulphide TETD.
Advantageously, the peroxy compound is di-tert-butyl peroxide DTBP, benzoyl peroxide BPO or dicumyl peroxide DCP.
The chemical stabilizer is very beneficial to adding aromatic hydrocarbon ester dibutyl phthalate DBP, dioctyl phthalate DOP or diisooctyl phthalate DIOP into the chemical stabilizer, wherein the adding amount is 0.1-3%, so that the ductility and low-temperature performance of the asphalt are further improved, and the processability is improved.
The base asphalt is one or two or three kinds of straight asphalt or distilled asphalt or oxidized asphalt, which is prepared from middle east crude oil, such as Saite, Iran, Xirui, Aman, and Corett, and one, two or three kinds of asphalt are blended to AH-70 and AH-90 grade asphalt, so that the performance indexes of the modified asphalt can meet the application requirements of high-grade highways.
The macromolecular aromatic-rich component has the aromatic component molecular weight of more than 2000 and the aromatic ester content of 1-10 percent, the boiling point of the macromolecular aromatic-rich component is more than 350 ℃, residual oil or asphalt in an oil refinery can be generally adopted, and a macromolecular aromatic compound is skillfully adopted as a compatilizer according to a similar phase dissolution principle, so that SBS and PE polymers can be well dispersed in the asphalt, the problems of solvent recovery, long process flow and residue caused by a low molecular weight solvent are avoided, and the macromolecular aromatic-rich component can adopt the residual oil or the asphalt in the oil refinery, has wide sources and low cost.
The SBS has a linear structure, wherein the content of styrene is 25-40%, the molecular weight is 10-40 ten thousand, the processability can be obviously improved, and polymer molecules can be prevented from being broken and decomposed in the shearing process.
The PE is low-density polyethylene or low-density linear polyethylene, the melt index is 0.5-10 g/10min, and the modified asphalt is improved in processability, viscoelastic behavior is adjusted, load-resistant stability of the asphalt is improved, and comprehensive performance of the modified asphalt is guaranteed.
The technical scheme adopted by the invention for solving the other technical problem is as follows: a storage type SBS modified asphalt production method is characterized in that: firstly, adding SBS, PE and a phase solvent into a double-screw extruder respectively according to the mass ratio of 60-90%, 5-30% and 5-30% through a material feeder capable of being metered for plastication, extruding and granulating to prepare SBS modified asphalt master batches, wherein the production and processing temperature is 120-180 ℃, the pressure is 1-4 MPa, the rotating speed is 100-400 rpm, and the time is 2-6 minutes; and then uniformly mixing 3-8% of SBS modified asphalt master batch, 90-95% of matrix asphalt and 0.1-2% of chemical stabilizer in a stirring and shearing reaction kettle, wherein the technological conditions are that the temperature is 150-175 ℃, the stirring and shearing speed is 120-1440 rpm, and the time is 20-60 minutes.
Compared with the prior art, the invention has the advantages that:
1) the prepared SBS modified asphalt master batch has the SBS content as high as 60-90%, the melting temperature lower than 140 ℃ and the viscosity as high as 1 multiplied by 105The modification effect of the polymer is ensured by more than posi;
2) the SBS modified asphalt master batch has good intermiscibility with the matrix asphalt, the process conditions for producing the modified asphalt are mild, special equipment such as a high-temperature condition of 180-190 ℃ and a high-shear colloid mill is not needed, and a modified asphalt product is prepared by adopting simple shearing and stirring equipment and dispersing and mixing for 20-60 minutes under the conditions of the processing temperature of 160-175 ℃ and normal pressure;
3) the SBS modified asphalt adopts a macromolecular phase solvent technology, so that the problems of long process flow, recovery, residue and the like caused by a light solvent are avoided, the safety performance is good, the influence of the residual solvent on indexes such as modified asphalt quality loss, softening point, penetration and the like can be avoided, and the comprehensive performance is good;
4) adopts the chemical stabilizer to form heterogeneous chemical crosslinking between the polymer and the asphalt, so that the SBS molecules and the asphalt component molecules are chemically bonded, the cohesion between SBS macromolecules is overcome, the SBS is prevented from being coagulated and separated, the SBS and the asphalt phase form a uniform stable system, under the separation test conditions of 163 ℃ and 48hr, the difference of the upper softening point and the lower softening point is less than 2.5 ℃, can meet the requirement of long-period thermal state storage, the canned SBS modified asphalt can be pulled to a construction site as a finished product to carry out asphalt concrete production and road construction, the requirement of construction operation is met, the process step that the construction site needs to melt the modified asphalt or the modifier and the matrix asphalt to carry out melt mixing is avoided, the labor intensity of constructors is reduced, the working environment is improved, meanwhile, the quality of the modified asphalt can be improved and kept stable by utilizing factory equipment, and the method is suitable for the requirement of large-scale construction progress;
5) the addition proportion of the SBS modified asphalt master batch is only 3-8%, the modification effect on different matrix asphalt is good, and the comprehensive index reaches the requirements of JTJ036-98 technical Specification for highway asphalt pavement construction I-C and I-D; the preparation method of the SBS modified asphalt realizes the direct mixing of the polymer and the asphalt and has the advantages of short processing flow, simple equipment, mild process conditions, quick production, low investment and operation cost and the like.
Drawings
FIG. 1 is a schematic view of the process flow of the storage type SBS master batch method modified asphalt production process
FIG. 2 is a microphase diagram of a comparative modified asphalt without a stabilizer;
FIG. 3 is a microphase diagram of the modified asphalt after addition of the stabilizer.
Detailed Description
The present invention will be described in further detail with reference to the following examples and the accompanying drawings.
Examples 1
1) The SBS modified asphalt master batch is prepared from the following selected components:
SBS 80% adopts linear structure, wherein styrene content is 32%, average molecular weight is 20 ten thousand.
PE 10% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
The 10% of phase solvent adopts residual oil of oil refinery, the aromatic component molecular weight is more than 2000, the aromatic ester accounts for 5%, the boiling point is more than 350 ℃, and the upper limit is to a reasonable range.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-170 ℃, the pressure is 1-2 MPa, the rotating speed is 300rpm, and the time is 3 minutes.
2) Preparing storage type SBS modified asphalt, then mixing 6% of SBS modified asphalt master batch, 93% of base asphalt with the mark of AH-70 and the penetration degree of 72(0.1mm), 0.4% of chemical stabilizer and 0.6% of aromatic hydrocarbon ester uniformly in a stirring and shearing reaction kettle, wherein the chemical stabilizer is dithiodimorpholine DTDM, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 150-. It can be seen that the SBS modified asphalt added with the stabilizer is characterized in that SBS particles are uniformly distributed in an asphalt phase after a thermal state storage test, the SBS particles are surrounded by the asphalt to form a peach-pit structure, heterogeneous chemical bond crosslinking is formed between polymer SBS and the asphalt through the chemical stabilizer, the polymer SBS and the asphalt are dispersed more uniformly and stably, and the SBS particles are not aggregated and separated. In contrast to FIG. 2, the SBS modified asphalt without the stabilizer has the problems that the SBS is not uniformly distributed in the asphalt phase due to the coagulation and segregation after the hot storage test.
The obtained modified asphalt has the main properties:
penetration degree: 49(0.1mm), softening point: ductility at 70 ℃, 5 ℃: 28cm, segregation: 2.0 deg.C
Example 2 of embodiment
1) The preparation method of the SBS modified asphalt master batch comprises the following steps:
SBS 90% adopts linear structure, wherein styrene content is 25%, average molecular weight is 20 ten thousand.
PE 5% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
5% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 5%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-170 ℃, the pressure is 1-2 MPa, the rotating speed is 300rpm, and the time is 2 minutes.
2) The preparation method of the storage type SBS modified asphalt comprises the following steps of uniformly mixing 7% of SBS modified asphalt master batch, 92% of base asphalt with the brand number of AH-90 and the penetration degree of 95(0.1mm), 0.4% of chemical stabilizer and 0.6% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is TETD, the aromatic hydrocarbon ester is DOP, and the mixing process conditions are that the temperature is 160-170 ℃, the stirring and shearing speed is 600rpm, and the time is 40 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bonds are formed between the SBS polymer and the asphalt through the chemical stabilizer, the SBS polymer and the asphalt are more uniformly and stably dispersed, and the SBS polymer and the asphalt are not easy to segregate and self-polymerize.
The obtained modified asphalt has the main properties:
penetration degree: 66(0.1mm), softening point: 80 ℃, 5 ℃ ductility: 47cm, segregation: 1.0 deg.C
EXAMPLE 3
1) The preparation method of the SBS modified asphalt master batch comprises the following steps:
SBS 90% adopts linear structure, wherein styrene content is 25%, average molecular weight is 20 ten thousand.
PE 5% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
5% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 5%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160 ℃, the pressure is 1-2 MPa, the rotating speed is 300rpm, and the time is 6 minutes.
2) The preparation method of the storage type SBS modified asphalt comprises the following steps of uniformly mixing 8% of SBS modified asphalt master batch, 90% of base asphalt with the brand number of AH-90 and the penetration degree of 95(0.1mm), 0.5% of chemical stabilizer and 1.5% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DTDM: TETD (1: 1), the aromatic hydrocarbon ester is DOP, the mixing process conditions are that the temperature is 160-170 ℃, the stirring and shearing speed is 600rpm, and the time is 40 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bond crosslinking is formed between the SBS polymer and the asphalt through the chemical stabilizer, the SBS polymer and the asphalt are dispersed more uniformly and stably and are not easy to segregate and self-polymerize. The obtained modified asphalt has the main properties:
penetration degree: 68(0.1mm), softening point: ductility at 85 ℃, 5 ℃: 49cm, segregation: 0.5 deg.C
EXAMPLE 4
1) The preparation method of the SBS modified asphalt master batch comprises the following steps:
SBS 90% adopts linear structure, wherein styrene content is 25%, average molecular weight is 20 ten thousand.
PE 5% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
5% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 5%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-170 ℃, the pressure is 1-2 MPa, the rotating speed is 300rpm, and the time is 5 minutes.
2) The preparation method of storage type SBS modified asphalt comprises the following steps of uniformly mixing 3% of SBS modified asphalt master batch, 95% of base asphalt with the brand number of AH-90 and the penetration degree of 95(0.1mm), 0.5% of chemical stabilizer and 1.5% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is TMTD, the aromatic hydrocarbon ester is DOP, and the mixing process conditions are that the temperature is 160-165 ℃, the stirring and shearing speed is 600rpm, and the time is 40 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bonds are formed between the SBS polymer and the asphalt through the chemical stabilizer, the SBS polymer and the asphalt are more uniformly and stably dispersed, and the SBS polymer and the asphalt are not easy to segregate and self-polymerize. The obtained modified asphalt has the main properties:
penetration degree: 78(0.1mm), softening point: ductility at 5 ℃ at 55 ℃: 30cm, segregation: 1.5 deg.C
EXAMPLE 5
1) The preparation method of the SBS modified asphalt master batch comprises the following steps:
SBS 90% adopts linear structure, wherein styrene content is 25%, average molecular weight is 20 ten thousand.
PE 5% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
5% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 5%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-170 ℃, the pressure is 1-2 MPa, the rotating speed is 300rpm, and the time is 6 minutes.
2) The preparation method of storage type SBS modified asphalt comprises the following steps of uniformly mixing 4% of SBS modified asphalt master batch, 95% of base asphalt with the mark of AH-90 penetration degree of 95(0.1mm), 0.1% of chemical stabilizer and 0.9% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DTDM, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 160-175 ℃, the stirring and shearing speed is 600rpm, and the time is 40 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bond crosslinking is formed between the polymer SBS and the asphalt through the chemical stabilizer, the polymer SBS and the asphalt are dispersed more uniformly and stably and are not easy to segregate and self-polymerize. The obtained modified asphalt has the main properties:
penetration degree: 74(0.1mm), softening point: ductility at 57 ℃, 5 ℃: 31cm, segregation: 1.0 deg.C
Example 6
1) The preparation method of the SBS modified asphalt master batch comprises the following steps:
SBS 60% adopts linear structure, wherein styrene content is 32%, average molecular weight is 25 ten thousand.
PE 20% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
20% of the phase solvent adopts residual oil of an oil refinery, the aromatic component has a molecular weight of more than 2000, the aromatic ester accounts for 5%, and the boiling point of the aromatic ester is more than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-175 ℃, the pressure is 1-2 MPa, the rotating speed is 300rpm, and the time is 4 minutes.
2) The preparation method of storage type SBS modified asphalt comprises the following steps of uniformly mixing 5% of SBS modified asphalt master batch, 93% of base asphalt with the brand name of AH-90, 1% of chemical stabilizer and 1% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DTDM, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 170 ℃, the stirring and shearing speed is 600rpm, and the time is 20 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the polymer particles, heterogeneous chemical bond crosslinking is formed between the polymer SBS and the asphalt through the chemical stabilizer, the polymer SBS and the asphalt are dispersed more uniformly and stably and are not easy to segregate and self-polymerize.
The obtained modified asphalt has the main properties:
penetration degree: 68(0.1mm), softening point: ductility at 57 ℃, 5 ℃: 32cm, segregation: 1.0 deg.C
EXAMPLE 7
1) The SBS modified asphalt master batch comprises the following selected components:
SBS 70% adopts linear structure, wherein styrene content is 40%, average molecular weight is 30 ten thousand.
PE 20% low density polyethylene or low density linear polyethylene, melt index 10g/10 min.
The 10% of phase solvent adopts residual oil or asphalt of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 10%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 180 ℃, the pressure is 1MPa, the rotating speed is 400rpm, and the time is 5 minutes.
2) The preparation method of storage type SBS modified asphalt comprises the following steps of uniformly mixing 4.9% of SBS modified asphalt master batch, 92% of base asphalt with the brand number of AH-70 and the penetration degree of 72(0.1mm), 0.1% of chemical stabilizer and 3% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DTBP, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 160-170 ℃, the stirring and shearing speed is 600rpm, and the time is 40 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bond crosslinking is formed between the SBS polymer and the asphalt through the chemical stabilizer, the SBS polymer and the asphalt are dispersed more uniformly and stably and are not easy to segregate and self-polymerize.
The obtained modified asphalt has the main properties:
penetration degree: 55(0.1mm), softening point: 58 ℃, 5 ℃ ductility: 33cm, segregation: 2.5 deg.C
EXAMPLE 8
1) The SBS modified asphalt master batch comprises the following selected components:
SBS 70% adopts linear structure, wherein styrene content is 25%, average molecular weight is 10 ten thousand.
PE 20% low density polyethylene or low density linear polyethylene, melt index 2g/10 min.
The 10% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 2%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-170 ℃, the pressure is 1MPa, the rotating speed is 300rpm, and the time is 2 minutes.
2) The preparation method of storage type SBS modified asphalt comprises the following steps of uniformly mixing 6% of SBS modified asphalt master batch, 93% of base asphalt with the brand number of AH-70 and the penetration degree of 72(0.1mm), 0.6% of chemical stabilizer and 0.4% of aromatic hydrocarbon ester in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DTDM: DTBP (1: 1), the aromatic hydrocarbon ester is DIOP, the mixing process conditions are that the temperature is 150-170 ℃, the stirring and shearing speed is 1000rpm, and the time is 60 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bond crosslinking is formed between the SBS polymer and the asphalt through the chemical stabilizer, the SBS polymer and the asphalt are dispersed more uniformly and stably and are not easy to segregate and self-polymerize.
The obtained modified asphalt has the main properties:
penetration degree: 52(0.1mm), softening point: ductility at 62 ℃, 5 ℃: 35cm, segregation: 1.2 deg.C
EXAMPLE 9
1) The SBS modified asphalt master batch comprises the following selected components:
SBS 70% adopts linear structure, wherein styrene content is 25%, average molecular weight is 10 ten thousand.
PE 20% low density polyethylene or low density linear polyethylene, melt index 0.5g/10 min.
The 10% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 1%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160-165 ℃, the pressure is 2MPa, the rotating speed is 300rpm, and the time is 4 minutes.
2) The preparation of storage type SBS modified asphalt, then, 5% of SBS modified asphalt master batch, 93% of base asphalt with the brand name of AH-70 in the above example, 0.6% of chemical stabilizer and 1.4% of aromatic hydrocarbon ester are mixed uniformly in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DTDM, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 150 ℃, the stirring and shearing speed is 1440rpm, and the time is 60 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, and heterogeneous chemical bond crosslinking is formed between polymer SBS and asphalt through the chemical stabilizer, so that the polymer SBS and the asphalt are dispersed more uniformly and stably and are not easy to separate.
The obtained modified asphalt has the main properties:
penetration degree: 55(0.1mm), softening point: 58 ℃, 5 ℃ ductility: 29cm, segregation: 1.5 deg.C
Example 10
1) The SBS modified asphalt master batch comprises the following selected components:
SBS 70% adopts linear structure, wherein styrene content is 25%, average molecular weight is 10 ten thousand.
PE 20% low density polyethylene or low density linear polyethylene, melt index 2g/10 min.
The 10% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 2%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 120 ℃, the pressure is 1MPa, the rotating speed is 300rpm, and the time is 3 minutes.
2) The preparation of storage type SBS modified asphalt, then, 5% of SBS modified asphalt master batch, 93% of base asphalt with the brand number of AH-70, 0.6% of chemical stabilizer and 1.4% of aromatic hydrocarbon ester are mixed uniformly in a stirring and shearing reaction kettle, wherein the chemical stabilizer is BPO, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 170 ℃, the stirring and shearing speed is 120rpm, and the time is 60 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, and heterogeneous chemical bond crosslinking is formed between polymer SBS and asphalt through the chemical stabilizer, so that the polymer SBS and the asphalt are dispersed more uniformly and stably and are not easy to segregate and self-polymerize.
The obtained modified asphalt has the main properties:
penetration degree: 57(0.1mm), softening point: ductility at 60 ℃, 5 ℃: 31cm, segregation: 2.2 deg.C
EXAMPLE 11
1) The SBS modified asphalt master batch comprises the following selected components:
SBS 70% adopts linear structure, wherein styrene content is 25%, average molecular weight is 10 ten thousand.
PE 20% low density polyethylene or low density linear polyethylene, melt index 1g/10 min.
The 10% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 2%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 140-165 ℃, the pressure is 1-2 MPa, the rotating speed is 200-300 rpm, and the time is 3 minutes.
2) The preparation of storage type SBS modified asphalt, then, 5% of SBS modified asphalt master batch, 93% of base asphalt with the brand name of AH-70 in the above example, 0.6% of chemical stabilizer and 1.4% of aromatic hydrocarbon ester are mixed uniformly in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DCP, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 180 ℃, the stirring and shearing speed is 120rpm, and the time is 20 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, and heterogeneous chemical bond crosslinking is formed between polymer SBS and asphalt through the chemical stabilizer, so that the polymer SBS and the asphalt are dispersed more uniformly and stably and are not easy to separate.
The obtained modified asphalt has the main properties:
penetration degree: 54(0.1mm), softening point: ductility at 57 ℃, 5 ℃: 27cm, segregation: 1.8 deg.C
EXAMPLE 12
1) The SBS modified asphalt master batch comprises the following selected components:
SBS 60% adopts linear structure, wherein styrene content is 40%, average molecular weight is 20 ten thousand.
PE 30% low density polyethylene or low density linear polyethylene, melt index 1g/10 min.
The 10% of phase solvent adopts residual oil of oil refinery, the molecular weight of aromatic component is greater than 2000, the aromatic ester accounts for 2%, and the boiling point is greater than 350 ℃.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 170 ℃, the pressure is 4MPa, the rotating speed is 100-200 rpm, and the time is 1 minute.
2) The preparation of storage type SBS modified asphalt, then 4.9% of SBS modified asphalt master batch, 93% of base asphalt with the brand name of AH-70 in the above example, 2% of chemical stabilizer and 0.1% of aromatic hydrocarbon ester are mixed uniformly in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DCP, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 180 ℃, the stirring and shearing speed is 320rpm, and the time is 20 minutes, so that the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the particles of the polymer, heterogeneous chemical bond crosslinking is formed between polymer SBS and asphalt through the chemical stabilizer, and the polymer SBS and the asphalt are dispersed more uniformly and stably and are not easy to separate.
EXAMPLE 13
1) SBS modified asphalt master batch, its selected component is;
SBS 60% adopts linear structure, wherein styrene content is 25%, average molecular weight is 20 ten thousand.
PE 10% low density polyethylene or low density linear polyethylene, melt index 5g/10 min.
The phase solvent is 30% of residual oil from oil refinery, the aromatic component has molecular weight greater than 2000, the aromatic ester accounts for 5%, and the boiling point is greater than 350 deg.C.
The above percentages are mass percentages.
The preparation method of the master batch comprises the steps of extruding and granulating SBS, PE and a phase solvent on a double-screw extruder or mixing and granulating on an open mill and an internal mixer according to the mass ratio, wherein the production and processing temperature is 160 ℃, the pressure is 2MPa, the rotating speed is 300rpm, and the time is 4 minutes.
2) The preparation of storage type SBS modified asphalt, then, 5% of SBS modified asphalt master batch, 93% of base asphalt with the brand name of AH-70 in the above example, 1% of chemical stabilizer and 1% of aromatic hydrocarbon ester are mixed uniformly in a stirring and shearing reaction kettle, wherein the chemical stabilizer is DCP, the aromatic hydrocarbon ester is DBP, the mixing process conditions are that the temperature is 170 ℃, the stirring and shearing speed is 400rpm, and the time is 40 minutes, the modified asphalt suitable for long-period thermal state storage can be obtained, asphalt phases are uniformly distributed around the polymer particles, and the polymer SBS and the asphalt form chemical bond crosslinking through the chemical stabilizer, so that the polymer SBS and the asphalt are dispersed out of phase more uniformly and stably and are not easy to segregate and self-polymerize.
Claims (10)
1. A storage type SBS modified asphalt is characterized in that the storage type SBS modified asphalt is formed by evenly mixing 3-8% of SBS modified asphalt master batch, 90-95% of matrix asphalt and 0.1-2% of chemical stabilizer;
wherein,
the SBS modified asphalt master batch comprises the following components:
SBS 60～90％
PE 5～30％
5-30% of a phase solvent;
the chemical stabilizer is selected from polysulfide or peroxy compounds;
the above percentages are mass percentages.
2. The SBS modified asphalt of claim 1 wherein the polysulfides are dithiodimorpholine DTDM or tetramethylthiuram disulfide TMTD, tetraethylthiuram disulfide TETD.
3. The storage-type SBS modified asphalt of claim 1, wherein the peroxy compound is di-t-butyl peroxide DTBP, benzoyl peroxide BPO, or dicumyl peroxide DCP.
4. The storage-type SBS modified asphalt according to claim 2 or 3, wherein the chemical stabilizer further comprises an aromatic hydrocarbon ester such as dibutyl phthalate DBP, dioctyl phthalate DOP or diisooctyl phthalate DIOP, and the addition amount is 0.1-3% by mass.
5. The SBS modified asphalt as claimed in claim 1, wherein the base asphalt is selected from one or two or three of Saudi, Iran, Tinry, and Aman middle east crude processed asphalt, and may be straight run or distilled asphalt, oxidized asphalt, solvent deasphalted asphalt, and even blended asphalt.
6. The storage type SBS modified asphalt as claimed in claim 1, wherein the phase solvent comprises macromolecular aromatic-rich component with molecular weight greater than 2000 and aromatic esters 1-10%, and its boiling point is greater than 350 ℃, and the phase solvent is oil refinery residual oil or asphalt.
7. The storage type SBS modified asphalt of claim 1, wherein the SBS has a linear structure, wherein the styrene content is 25-40%, and the molecular weight is 5-30 ten thousand.
8. The SBS modified asphalt of claim 1 wherein the PE is low density polyethylene or linear low density polyethylene and the melt index is 0.5 to 10g/10 min.
9. A process for producing the storage-type SBS modified asphalt of claim 1, wherein:
(1) firstly, extruding and granulating SBS, PE and a phase solvent on a double-screw extruder according to the mass ratio of 60-90%, 5-30% and 5-30% to prepare SBS modified asphalt master batch, wherein the production and processing temperature is 120-180 ℃, the pressure is 1-4 MPa, the rotating speed is 100-400 rpm, and the time is 1-6 minutes;
(2) and then, uniformly mixing at least 3-8% of SBS modified asphalt master batch, 90-95% of matrix asphalt and 0.1-2% of chemical stabilizer in a stirring and shearing reaction kettle, wherein the technological conditions are that the temperature is 150-180 ℃, the stirring and shearing speed is 120-1440 rpm, and the time is 20-60 minutes.
10. The method according to claim 9, characterized in that the chemical stabilizer is further added with an aromatic hydrocarbon ester such as dibutyl phthalate DBP, dioctyl phthalate DOP or diisooctyl phthalate DIOP in an amount of 0.1 to 3%.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451057C (en) * | 2006-12-29 | 2009-01-14 | 四川师范大学 | Adjuvant for promoting SBS modified asphalt high low temperature property and its usage method |
| CN101538408B (en) * | 2008-03-19 | 2011-08-31 | 重庆市智翔铺道技术工程有限公司 | High viscosity bitumen and preparation method thereof |
| CN101555355B (en) * | 2008-04-11 | 2012-05-30 | 深圳市海川实业股份有限公司 | Waste rubber modified asphalt |
| CN104910637A (en) * | 2015-06-10 | 2015-09-16 | 四川蜀羊防水材料有限公司 | SBS/PE (styrene-butadiene-styrene/polyethylene) modified asphalt material |
| CN105482469A (en) * | 2015-12-14 | 2016-04-13 | 云南公投建设集团有限公司 | Modified asphalt stabilizer |
| CN106700573A (en) * | 2016-11-22 | 2017-05-24 | 西藏宝利沥青有限公司 | Preparing method of cooling polymer modified asphalt and packing method thereof |
| CN112626963A (en) * | 2020-12-07 | 2021-04-09 | 长安大学 | Process and equipment for preparing asphalt concrete |
| CN113024982A (en) * | 2021-03-15 | 2021-06-25 | 西南交通大学 | Oil-filled SBS (styrene-butadiene-styrene) and preparation method and application thereof |
| CN113025070A (en) * | 2021-03-17 | 2021-06-25 | 山东京博石油化工有限公司 | Preparation method of high-viscosity modified asphalt |
| CN114106572A (en) * | 2021-12-15 | 2022-03-01 | 东南大学 | DOP/SBS biological asphalt modifier and preparation method of modified asphalt |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100451057C (en) * | 2006-12-29 | 2009-01-14 | 四川师范大学 | Adjuvant for promoting SBS modified asphalt high low temperature property and its usage method |
| CN101538408B (en) * | 2008-03-19 | 2011-08-31 | 重庆市智翔铺道技术工程有限公司 | High viscosity bitumen and preparation method thereof |
| CN101555355B (en) * | 2008-04-11 | 2012-05-30 | 深圳市海川实业股份有限公司 | Waste rubber modified asphalt |
| CN104910637A (en) * | 2015-06-10 | 2015-09-16 | 四川蜀羊防水材料有限公司 | SBS/PE (styrene-butadiene-styrene/polyethylene) modified asphalt material |
| CN105482469A (en) * | 2015-12-14 | 2016-04-13 | 云南公投建设集团有限公司 | Modified asphalt stabilizer |
| CN106700573B (en) * | 2016-11-22 | 2019-03-26 | 西藏宝利沥青有限公司 | A kind of preparation method and its packing method of the polymer modified asphalt that cools down |
| CN106700573A (en) * | 2016-11-22 | 2017-05-24 | 西藏宝利沥青有限公司 | Preparing method of cooling polymer modified asphalt and packing method thereof |
| CN112626963A (en) * | 2020-12-07 | 2021-04-09 | 长安大学 | Process and equipment for preparing asphalt concrete |
| CN113024982A (en) * | 2021-03-15 | 2021-06-25 | 西南交通大学 | Oil-filled SBS (styrene-butadiene-styrene) and preparation method and application thereof |
| CN113024982B (en) * | 2021-03-15 | 2022-08-05 | 西南交通大学 | Oil-filled SBS (styrene-butadiene-styrene) and preparation method and application thereof |
| CN113025070A (en) * | 2021-03-17 | 2021-06-25 | 山东京博石油化工有限公司 | Preparation method of high-viscosity modified asphalt |
| CN114106572A (en) * | 2021-12-15 | 2022-03-01 | 东南大学 | DOP/SBS biological asphalt modifier and preparation method of modified asphalt |
| EP4324884A1 (en) * | 2022-08-19 | 2024-02-21 | TotalEnergies OneTech | Bitumen/polymer composition with improved mechanical properties |
| WO2024038177A1 (en) * | 2022-08-19 | 2024-02-22 | Totalenergies Onetech | Bitumen/polymer composition with improved mechanical properties |
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