CN108395713B - Ultraviolet aging resistant high-viscosity asphalt additive and preparation method thereof - Google Patents
Ultraviolet aging resistant high-viscosity asphalt additive and preparation method thereof Download PDFInfo
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- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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Abstract
The invention discloses an ultraviolet aging resistant high-viscosity asphalt additive and a preparation method thereof. The high-viscosity asphalt additive comprises the following raw material components in parts by weight: 100 parts of SBS, 20-40 parts of petroleum resin, 10-40 parts of aromatic oil and 5-10 parts of organic-inorganic composite material; wherein the organic-inorganic composite material is formed by cohydrolysis and polycondensation reaction of tetraethoxysilane and organic silane containing triazinetrione groups. The high-viscosity asphalt additive of the invention not only can obviously improve the viscosity and the caking property of asphalt, but also has better compatibility with the asphalt, and greatly improves the ultraviolet aging resistance of the asphalt.
Description
Technical Field
The invention relates to a high-viscosity asphalt additive and a preparation method thereof, in particular to a high-viscosity asphalt additive with ultraviolet aging resistance and a preparation method thereof.
Background
The high-viscosity asphalt generally refers to asphalt with dynamic viscosity of more than 20000 Pa.s at 60 ℃, and is suitable for the application of open-graded anti-skid wearing course (OGFC) and other road surfaces. The OGFC road surface has good drainage, noise reduction and skid resistance due to the large void ratio. However, the structural characteristic of large void ratio also leads to the increase of the contact area of the asphalt with air and ultraviolet light, accelerates the aging of the asphalt and shortens the service life of the pavement.
At present, high-viscosity asphalt is mainly prepared by adding a polymer into asphalt, can obviously improve the high-temperature and low-temperature performances of the asphalt and improve the viscosity of the asphalt, but has the problems of uneven dispersion of the polymer, poor compatibility and the like. Meanwhile, the problem of insufficient ageing resistance exists.
CN101457009A discloses a high-viscosity asphalt modifier and a preparation method thereof, wherein the modifier comprises SIS, coumarone resin, oleamide and the like. The modifier has good compatibility with asphalt, and obviously improves the adhesion of the asphalt. However, the anti-aging problem of the high-viscosity asphalt is not considered, the anti-aging performance of the high-viscosity asphalt is insufficient, and the service life of the high-viscosity asphalt is influenced.
CN102838874A discloses an asphalt modifier, modified asphalt and an asphalt mixture. The high-viscosity asphalt modifier comprises waste tire rubber powder, polyethylene waste, a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, terpene resin, solvent oil, alcohol ether carboxylate and the like. The modified asphalt prepared by the modifier has better high and low temperature performances and water stability. But the used waste tire rubber powder still has the problems of poor compatibility with asphalt and insufficient ageing resistance.
In summary, the prior art can improve the viscosity and adhesiveness of asphalt to some extent, but has the problems of poor polymer compatibility and insufficient aging resistance.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an ultraviolet aging resistant high-viscosity asphalt additive and a preparation method thereof. The high-viscosity asphalt additive of the invention not only can obviously improve the viscosity and the caking property of asphalt, but also has better compatibility with the asphalt, and greatly improves the ultraviolet aging resistance of the asphalt.
The invention provides an ultraviolet aging resistant high-viscosity asphalt additive which comprises the following raw material components in parts by weight:
SBS: 100 parts of (A);
petroleum resin: 20-40 parts of a solvent;
aromatic oil: 10-40 parts;
5-10 parts of an organic-inorganic composite material;
wherein the organic-inorganic composite material is formed by cohydrolysis and polycondensation reaction of tetraethoxysilane and organic silane containing triazinetrione groups.
The organic silane containing the triazinetrione group is 1,3, 5-tris [3- (trimethoxysilyl) propyl ] -1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione, and can be represented by the following chemical formula:
formula (I).
The organic-inorganic composite material comprises raw materials of a polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer, hydrochloric acid, ethyl orthosilicate, organic silane containing a triazinetrione group and water, wherein the weight ratio of the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer to the hydrochloric acid to the ethyl orthosilicate to the organic silane containing the triazinetrione group to the water is (25-35): 130-200): 35-55): 30-50): 1000, preferably (28-32): 150-180): 85-X): X1000, wherein X = 30-50, and the concentration of the hydrochloric acid is 8-12 mol/L.
The temperature of the cohydrolysis and polycondensation reaction is 90-120 ℃, preferably 100-110 ℃, and the time is 36-48 h.
The SBS has a linear structure and the molecular weight of the SBS is 5-25 ten thousand.
The petroleum resin is carbon five petroleum resin, and the softening point of the petroleum resin is 90-120 ℃.
In the aromatic oil, the weight content of the aromatic hydrocarbon is 40-80%. The aromatic oil is a component rich in aromatic hydrocarbon, and can be derived from extract oil of lubricating oil base oil in a solvent refining process, such as furfural refined extract oil, phenol refined extract oil and the like.
The invention also provides a preparation method of the ultraviolet aging resistant high-viscosity asphalt additive, which comprises the following steps:
(1) dissolving a polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer and hydrochloric acid in water, continuously stirring until the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer and the hydrochloric acid are completely dissolved, adding tetraethoxysilane and organic silane containing triazinetrione groups, uniformly stirring, carrying out cohydrolysis and polycondensation reaction, filtering, washing and carrying out first drying after the reaction is finished, then adding a mixed solution of ethanol and hydrochloric acid, heating and refluxing, then washing and carrying out second drying to obtain the organic-inorganic composite material;
(2) the SBS, the petroleum resin, the aromatic oil and the organic-inorganic composite material are uniformly mixed, and then are subjected to blending extrusion and granulation by an extruder to obtain the ultraviolet aging resistant high-viscosity asphalt additive.
In the step (1), the weight ratio of the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer, hydrochloric acid, ethyl orthosilicate, organic silane containing triazinetrione groups and water is (25-35): (130-200): (35-55): (30-50): 1000, preferably (28-32): (150-180): (85-X): X:1000, wherein X = 30-50, and the concentration of hydrochloric acid is 8-12 mol/L.
In the step (1), the stirring temperature is 30-50 ℃, and the stirring time is 18-24 hours.
In the step (1), the temperature of the cohydrolysis and polycondensation reaction is 90-120 ℃, preferably 100-110 ℃, and the time is 36-48 h.
In step (1), the filtration, washing and drying can adopt the conventional method. Drying to volatilize the solvent, wherein the first drying temperature can be 80-120 ℃ and the time is 5-12 h. The temperature of the second drying can be 80-120 ℃, and the time is 5-12 h.
In the step (1), the heating reflux temperature is 60-90 ℃, preferably 70-80 ℃, and the time is 6-10 hours.
In the step (2), the extruder can be a conventionally used extruder, preferably a screw extruder, the extrusion temperature is 130-160 ℃, and the screw rotation speed is 30-150 r/min. The twin-screw extruder is further preferred, the two screws are parallel to each other in the barrel, the temperature in the barrel can be controlled in multiple sections, for example, the barrel of the extruder can be divided into eight temperature sections, and the specific operating conditions are as follows: a first section is 130-150 ℃; the second section is 135-155 ℃; three sections are 140-160 ℃; 140-160 ℃ in the fourth section; five sections are 150-160 ℃; six sections are 150-160 ℃; the seven sections are 145-160 ℃; eight sections are 150-160 ℃.
Compared with the prior art, the ultraviolet aging resistant high-viscosity asphalt additive and the preparation method thereof have the following advantages:
(1) the invention introduces organic groups of organic silane into the organic-inorganic composite material through copolycondensation-hydrolysis reaction of tetraethoxysilane and organic silane containing triazinetrione groups, and the organic groups are uniformly distributed in the organic-inorganic composite material, thereby preventing the physical migration or volatilization loss of the organic groups, so that the organic groups have the functions of absorbing ultraviolet rays, capturing free radicals, decomposing hydroperoxide and the like, inorganic components have stronger shielding function on the ultraviolet rays, the two functions are coordinated and mutually influenced, the comprehensive function of the inorganic groups greatly improves the ultraviolet aging resistance, and the viscosity and the caking property of the asphalt are obviously improved.
(2) The organic-inorganic composite material has the characteristics of organic groups and inorganic nano materials, breaks the boundary between organic matters and inorganic matters and ensures that the additive and the asphalt have excellent compatibility.
(3) The ultraviolet aging resistant high-viscosity asphalt additive is granular, is convenient to construct, simple to use and convenient to store and transport.
Detailed Description
The technical features of the present invention will be further described below by way of examples, which are not intended to limit the present invention. In the present invention, wt% is a mass fraction.
The co-hydrolysis and polycondensation are that organic silane and ethyl orthosilicate jointly undergo hydrolysis reaction and polycondensation reaction, so that organic-inorganic composite materials containing different organic groups are synthesized in one step.
Example 1
(1) Dissolving 29.14 parts by weight of polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer (P123) and 168.40 parts by weight of concentrated hydrochloric acid (12 mol/L) in 1000 parts by weight of water, continuously stirring until the mixture is completely dissolved, measuring 35 parts by weight of ethyl orthosilicate and 50 parts by weight of 1,3, 5-tris [3- (trimethoxysilyl) propyl ] -1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione, adding the ethyl orthosilicate and the 1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione into the solution, continuously stirring for 24 hours at 40 ℃, then placing the solution into a reaction kettle, standing for 48 hours at 100 ℃ in an oven to complete the cohydrolysis and polycondensation reactions, filtering and washing with water, drying for 12 hours at 100 ℃, adding the solution into a mixed solution of 600 parts by weight of anhydrous ethanol and 10 parts by weight of concentrated hydrochloric acid (12 mol/L), heating and refluxing for 8 hours at 80 ℃, then washing the mixture to be neutral, washing the mixture by ethanol, and drying the mixture for 8 hours at 100 ℃ to obtain about 37.4 parts by weight of the organic-inorganic composite material.
(2) Uniformly mixing 100 parts by weight of SBS (molecular weight is 10 ten thousand), 40 parts by weight of carbon five petroleum resin (softening point is 95 ℃), 20 parts by weight of aromatic oil (aromatic hydrocarbon content is 40 wt%) and 5 parts by weight of organic-inorganic composite material, blending, extruding and granulating by a double-screw extruder to obtain the ultraviolet aging resistant high-viscosity asphalt additive. The extruder operating conditions were: the first section is 150 ℃; the second section is 155 ℃; the third section is 160 ℃; the fourth section is 160 ℃; the fifth section is 160 ℃; the six sections are 160 ℃; the seven sections are 160 ℃; the eight sections are 160 ℃. The screw speed was 50 r/min.
Example 2
(1) Dissolving 29.14 parts by weight of polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer (P123) and 168.40 parts by weight of concentrated hydrochloric acid (12 mol/L) in 1000 parts by weight of water, continuously stirring until the mixture is completely dissolved, measuring 45 parts by weight of ethyl orthosilicate and 40 parts by weight of 1,3, 5-tris [3- (trimethoxysilyl) propyl ] -1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione, adding the ethyl orthosilicate and the 1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione into the solution, continuously stirring for 20 hours at 40 ℃, then placing the solution into a reaction kettle, standing for 48 hours at 100 ℃ in an oven, cooling, carrying out suction filtration, washing with water, drying for 12 hours at 100 ℃, adding the solution into a mixed solution of 540 parts by weight of anhydrous ethanol and 9 parts by weight of concentrated hydrochloric acid (12 mol/L), heating and refluxing for 8 hours at 80 ℃, then washing, after washing with ethanol, drying at 100 ℃ for 8h to obtain about 34.8 parts by weight of the organic-inorganic composite material.
(2) Uniformly mixing 100 parts by weight of SBS (molecular weight is 15 ten thousand), 30 parts by weight of carbon five petroleum resin (softening point is 100 ℃), 30 parts by weight of aromatic oil (aromatic hydrocarbon content is 60 wt%) and 7 parts by weight of organic-inorganic composite material, blending, extruding and granulating by a double-screw extruder to obtain the ultraviolet aging resistant high-viscosity asphalt additive. The extruder operating conditions were: the first section is 140 ℃; the second section is 145 ℃; the third section is 150 ℃; the fourth section is 150 ℃; the fifth section is 155 ℃; the six sections are 155 ℃; the seven sections are 155 ℃; the eight sections are 155 ℃. The screw speed was 80 r/min.
Example 3
(1) Dissolving 31 parts by weight of polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer (P123) and 160 parts by weight of concentrated hydrochloric acid (12 mol/L) in 1000 parts by weight of water, continuously stirring until the copolymer is completely dissolved, weighing 55 parts by weight of ethyl orthosilicate and 30 parts by weight of 1,3, 5-tris [3- (trimethoxysilyl) propyl ] -1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione, adding the ethyl orthosilicate and the 1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione into the solution, continuously stirring for 18 hours at 40 ℃, then putting the mixture into a reaction kettle, standing the mixture in an oven at 100 ℃ for 36 hours, cooling and carrying out suction filtration, drying the mixture for 12 hours at 100 ℃, adding the dried mixture into a mixed solution of 480 parts by weight of anhydrous ethanol and 8 parts by weight of concentrated hydrochloric acid (12 mol/L), heating and refluxing the mixture for 8 hours at 80, washing with ethanol, and drying at 100 deg.C for 8 hr to obtain the organic-inorganic composite material.
(2) Uniformly mixing 100 parts by weight of SBS (molecular weight is 20 ten thousand), 20 parts by weight of carbon five petroleum resin (softening point is 110 ℃), 40 parts by weight of aromatic oil (aromatic hydrocarbon content is 80 wt%) and 10 parts by weight of organic-inorganic composite material, and then blending, extruding and granulating by a double-screw extruder to obtain the ultraviolet aging resistant high-viscosity asphalt additive. The extruder operating conditions were: the first section is 130 ℃; the second section is 135 ℃; the third section is 140 ℃; the fourth section is 140 ℃; the fifth section is 150 ℃; the six sections are 150 ℃; the seven sections are 145 ℃; the eight sections are 150 ℃. The screw speed was 120 r/min.
Comparative example 1
(1) Dissolving 29.14 parts by weight of polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer (P123) and 168.40 parts by weight of concentrated hydrochloric acid (12 mol/L) in 1000 parts by weight of water, continuously stirring until the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer is completely dissolved, measuring 45 parts by weight of ethyl orthosilicate, adding the ethyl orthosilicate into the solution, continuously stirring for 20 hours at 40 ℃, then placing the solution into a reaction kettle, standing for 48 hours at 100 ℃ in an oven, cooling, carrying out suction filtration, washing with water, drying for 12 hours at 100 ℃, adding the ethyl orthosilicate into a mixed solution of 540 parts by weight of anhydrous ethanol and 9 parts by weight of concentrated hydrochloric acid (12 mol/L), heating and refluxing for 8 hours at 80 ℃, then washing with water until the solution is neutral, and drying for 8 hours at 100 ℃ after washing with ethanol to obtain about 13.0 parts by weight of inorganic material.
(2) Uniformly mixing 100 parts by weight of SBS (molecular weight is 10 ten thousand), 40 parts by weight of carbon five petroleum resin (softening point is 95 ℃), 20 parts by weight of aromatic oil (aromatic hydrocarbon content is 40 wt%), 1.43 parts by weight of inorganic material and 3.57 parts by weight of 1,3, 5-tri [3- (trimethoxysilyl) propyl ] -1,3, 5-triazine-2, 4,6(1H,3H,5H) -trione, and then blending, extruding and granulating by a double screw extruder to obtain the ultraviolet aging resistant high viscosity asphalt additive. The extruder operating conditions were: the first section is 150 ℃; the second section is 155 ℃; the third section is 160 ℃; the fourth section is 160 ℃; the fifth section is 160 ℃; the six sections are 160 ℃; the seven sections are 160 ℃; the eight sections are 160 ℃. The screw speed was 50 r/min.
Comparative example 2
Uniformly mixing 100 parts by weight of SBS (molecular weight is 10 ten thousand), 40 parts by weight of carbon five petroleum resin (softening point is 95 ℃), 20 parts by weight of aromatic oil (aromatic hydrocarbon content is 40 wt%), 1.43 parts by weight of titanium dioxide and 3.57 parts by weight of ultraviolet-resistant absorbent UV-531 (2-hydroxy-4-n-octoxy benzophenone), and then carrying out blending extrusion and granulation by a double-screw extruder to obtain the ultraviolet-aging-resistant high-viscosity asphalt additive. The operating conditions of the extruder were: the first section is 150 ℃; the second section is 155 ℃; the third section is 160 ℃; the fourth section is 160 ℃; the fifth section is 160 ℃; the six sections are 160 ℃; the seven sections are 160 ℃; the eight sections are 160 ℃. The screw speed was 50 r/min.
Test example
The anti-aging high-viscosity modified asphalt additive was added in an amount of 12 parts by weight to 100 parts by weight of molten base asphalt (vacuum residue, 25 ℃ penetration 711/10 mm), and the mixture was uniformly dispersed in the base asphalt by high-speed shearing at 175 ℃ for 1 hour and stirring at the same temperature for 0.5 hour, and the obtained high-viscosity modified asphalt was tested and the results are shown in Table 1. Wherein the ultraviolet aging test is carried out in an ultraviolet aging box, and the ultraviolet intensity is 1200 mu w/cm2The aging temperature is 60 ℃, and the aging time is 6 days.
TABLE 1 Properties of base asphalts and modified asphalts obtained in examples and comparative examples
| Base asphalt | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | |
| Penetration/25 deg.C, 0.1mm | 71 | 60 | 59 | 58 | 60 | 61 |
| 5 ℃ ductility/cm | 11 | 43 | 45 | 46 | 43 | 44 |
| Dynamic viscosity/pas at 60 DEG C | 210 | 105675 | 108543 | 112532 | 103176 | 102717 |
| Softening point/. degree.C | 47.9 | 89.3 | 89.6 | 90.2 | 89.2 | 89.1 |
| After ultraviolet aging test | ||||||
| Penetration ratio/%) | 52 | 63 | 65 | 68 | 59 | 57 |
| Residual ductility ratio/%) | - | 19 | 23 | 24 | 16 | 12 |
As can be seen from Table 1, the anti-ultraviolet aging high-viscosity modified asphalt additive of the invention can obviously improve the viscosity of asphalt. Compared with comparative examples 1-3, the penetration ratio and the residual ductility ratio of the modified asphalt are obviously improved after the ultraviolet aging test by adopting the method of the invention, which shows that the ultraviolet aging resistance of the asphalt can be obviously improved by adopting the organic-inorganic composite material.
As can be seen from comparative examples 1 and 2, the UV aging resistance effect is inferior to that of examples 1 to 3, mainly because comparative examples 1 and 2 are not well compatible with asphalt by simply adding inorganic materials or nano titanium dioxide, and the absorbent UV-531 volatilizes and physically migrates to cause loss. Therefore, the ultraviolet aging resistance effect is not as good as that of the asphalt modified by the additive of the invention.
Claims (17)
1. The ultraviolet aging resistant high-viscosity asphalt additive comprises the following raw material components in parts by weight:
SBS: 100 parts of (A);
petroleum resin: 20-40 parts of a solvent;
aromatic oil: 10-40 parts;
5-10 parts of an organic-inorganic composite material;
the specific preparation method of the organic-inorganic composite material comprises the following steps: dissolving a polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer and hydrochloric acid in water, continuously stirring until the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer and the hydrochloric acid are completely dissolved, adding tetraethoxysilane and organic silane containing triazinetrione groups, uniformly stirring, carrying out cohydrolysis and polycondensation reaction, filtering, washing and carrying out first drying after the reaction is finished, then adding a mixed solution of ethanol and hydrochloric acid, heating and refluxing, then washing and carrying out second drying to obtain the organic-inorganic composite material.
2. The additive of claim 1, wherein the weight ratio of the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer to the hydrochloric acid to the ethyl orthosilicate to the triazinetrione group-containing organosilane to the water is (25-35) to (130-200) to (35-55) to (30-50) to 1000, and the concentration of the hydrochloric acid is 8-12 mol/L.
3. The additive of claim 2, wherein the weight ratio of the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer, hydrochloric acid, ethyl orthosilicate, the triazinetrione group-containing organosilane and water is (28-32): (150-180): (85-X): X:1000, wherein X = 30-50.
4. Additive according to claim 1, wherein the temperature of the cohydrolysis and polycondensation reaction is 90 to 120 ℃ and the time is 36 to 48 hours.
5. Additive according to claim 4, wherein the temperature of the cohydrolysis and polycondensation reaction is between 100 and 110 ℃.
6. The additive according to claim 1, wherein the SBS has a linear structure and a molecular weight of 5 to 25 ten thousand.
7. Additive according to claim 1, wherein the petroleum resin is a carbon penta petroleum resin having a softening point of 90 ℃ to 120 ℃.
8. Additive according to claim 1, wherein the aromatic oil comprises 40% to 80% by weight of aromatic hydrocarbon.
9. A process for the preparation of the additive according to any one of claims 1 to 8, characterized in that it comprises the following steps:
(1) dissolving a polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer and hydrochloric acid in water, continuously stirring until the polyvinyl ether-polypropylene ether-polyvinyl ether triblock copolymer and the hydrochloric acid are completely dissolved, adding tetraethoxysilane and organic silane containing triazinetrione groups, uniformly stirring, carrying out cohydrolysis and polycondensation reaction, filtering, washing and carrying out first drying after the reaction is finished, then adding a mixed solution of ethanol and hydrochloric acid, heating and refluxing, then washing and carrying out second drying to obtain the organic-inorganic composite material;
(2) the SBS, the petroleum resin, the aromatic oil and the organic-inorganic composite material are uniformly mixed, and then are subjected to blending extrusion and granulation by an extruder to obtain the ultraviolet aging resistant high-viscosity asphalt additive.
10. The preparation method according to claim 9, wherein in the step (1), after adding the tetraethoxysilane and the organic silane containing the triazinetrione group, the stirring temperature is 30 ℃ to 50 ℃ and the stirring time is 18 to 24 hours.
11. The method according to claim 9, wherein in the step (1), the temperature of the cohydrolysis and polycondensation reaction is 90 to 120 ℃ and the time is 36 to 48 hours.
12. The method according to claim 11, wherein the temperature of the cohydrolysis and polycondensation reaction in the step (1) is 100 to 110 ℃.
13. The preparation method according to claim 9, wherein in the step (1), the temperature of the first drying is 80-120 ℃ and the time is 5-12 h; the temperature of the second drying is 80-120 ℃, and the time is 5-12 h.
14. The method according to claim 9, wherein in the step (1), the heating reflux temperature is 60 to 90 ℃ and the heating reflux time is 6 to 10 hours.
15. The method according to claim 14, wherein the temperature of the heating reflux in the step (1) is 70 to 80 ℃.
16. The preparation method according to claim 9, wherein in the step (2), the extruder is a screw extruder, the extrusion temperature is 130-160 ℃, and the screw rotation speed is 30-150 r/min; eight temperature stages of operation were employed, with the operating conditions as follows: the temperature of one section is 130-150 ℃; the second section is 135-155 ℃; the three sections are 140-160 ℃; the fourth section is 140-160 ℃; the fifth section is 150-160 ℃; the six sections are 150-160 ℃; the seven sections are 145-160 ℃; the eight sections are 150-160 ℃.
17. The production method according to claim 16, wherein in the step (2), the extruder is a twin-screw extruder.
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| CN201710066705.7A CN108395713B (en) | 2017-02-07 | 2017-02-07 | Ultraviolet aging resistant high-viscosity asphalt additive and preparation method thereof |
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