CN116063857A - Polymer mother liquor and preparation method thereof, and No. 50A grade asphalt and preparation method thereof - Google Patents
Polymer mother liquor and preparation method thereof, and No. 50A grade asphalt and preparation method thereof Download PDFInfo
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- CN116063857A CN116063857A CN202111272453.6A CN202111272453A CN116063857A CN 116063857 A CN116063857 A CN 116063857A CN 202111272453 A CN202111272453 A CN 202111272453A CN 116063857 A CN116063857 A CN 116063857A
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- 239000010426 asphalt Substances 0.000 title claims abstract description 137
- 229920000642 polymer Polymers 0.000 title claims abstract description 72
- 239000012452 mother liquor Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000011159 matrix material Substances 0.000 claims abstract description 57
- 230000035515 penetration Effects 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 238000010008 shearing Methods 0.000 claims description 7
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 2
- 239000005060 rubber Substances 0.000 claims description 2
- 239000010779 crude oil Substances 0.000 abstract description 12
- 239000010413 mother solution Substances 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000032683 aging Effects 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 13
- 238000010438 heat treatment Methods 0.000 description 11
- 238000011835 investigation Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007616 round robin method Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
- C08L53/02—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 of vinyl-aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the field of petroleum asphalt, in particular to polymer mother liquor and a preparation method thereof, and No. 50A grade asphalt and a preparation method thereof. The method comprises the steps of mixing raw materials comprising a polymer, a compatilizer and first matrix asphalt to obtain a polymer mother solution; the penetration of the first matrix asphalt at 25 ℃ is 45-55 10 ‑1 mm, softening point not less than 49.5deg.C, and 10 deg.C ductility not more than 10cm. The invention adopts the matrix asphalt with the characteristics to prepare the polymer mother liquor, can improve the compatibility of the polymer mother liquor and the matrix asphalt, and prepares No. 50A grade asphalt by taking the polymer mother liquor (soft component) and the matrix asphalt (hard component) as raw materials through an asphalt blending technology, thereby not only being capable of extractingThe asphalt has high softening point, reduces penetration of asphalt, improves asphalt ductility and ageing resistance, improves asphalt stability, and can greatly reduce dependence on crude oil in the asphalt preparation process.
Description
Technical Field
The invention relates to the field of petroleum asphalt, in particular to polymer mother liquor and a preparation method thereof, and No. 50A grade asphalt and a preparation method thereof.
Background
The low-grade hard road asphalt produced by reduced pressure distillation and deep drawing cannot completely meet the technical requirements for class A asphalt in the technical Specification for construction of Highway asphalt pavement (JTG F40-2004) issued by the Ministry of transportation 2004, which is mainly limited by the nature of crude oil. The crude oil in China mostly belongs to low-sulfur paraffin base, and in general, the crude oil is difficult to produce high-quality A-grade road asphalt, so that the quality and quantity of the road asphalt in China cannot meet the market demand for a long time, and along with the import of a large quantity of crude oil, particularly middle east crude oil (suitable for serving as asphalt raw materials), the proportion of high-quality asphalt with high penetration is obviously improved (such as No. 90A-grade asphalt, no. 70A-grade asphalt and the like).
At present, the road surface of China is faced with the problems of heavy load, overload, more vehicles, high speed, large traffic flow and the like, the road surface is easy to generate ruts, running safety is seriously threatened, and the 50A-grade road asphalt can effectively solve the rutting problem of the asphalt road surface. However, oil refining enterprises process middle east imported crude oil by using an atmospheric and vacuum distillation technology, and direct production of No. 50A grade road asphalt has the problems of few types of crude oil selection, great difficulty in production operation control, product quality blocking (especially 10 ℃ ductility index) phenomenon and the like, so that market supply of No. 50A grade asphalt is limited, and the contradiction between the demand and supply of No. 50A grade road asphalt is increasingly outstanding.
Disclosure of Invention
The invention aims to overcome the defects of high penetration, low softening point, 10 ℃ ductility card edge and complex preparation of No. 50 asphalt in the prior art, and provides polymer mother liquor and a preparation method thereof, and No. 50A asphalt and a preparation method thereof. The method has low crude oil dependence, and the prepared grade-50A asphalt has low penetration, high softening point and good ductility.
In order to achieve the above object, the first aspect of the present invention provides a method for preparing a polymer mother liquor, the method comprising mixing raw materials including a polymer, a compatibilizer, and a first matrix asphalt to obtain the polymer mother liquor;
the penetration of the first matrix asphalt at 25 ℃ is 45-55 10 -1 mm, softening point not less than 49.5deg.C, and 10 deg.C ductility not more than 10cm.
The second aspect of the invention provides a polymer mother solution prepared by the preparation method.
The third aspect of the invention provides a method for preparing No. 50A grade asphalt, which comprises the following steps:
preparing a polymer mother liquor according to the method;
blending the polymer mother liquor with second matrix asphalt to obtain No. 50 grade A asphalt;
wherein the penetration of the second matrix asphalt at 25 ℃ is 45-55 10 -1 mm, softening point not less than 49.5deg.C, and 10 deg.C ductility not more than 10cm; preferably, the method comprises the steps of,
the second matrix asphalt is the same as the first matrix asphalt.
The fourth aspect of the invention provides the No. 50A grade asphalt prepared by the method, wherein the polymer content in the No. 50A grade asphalt is less than or equal to 1%.
Through the technical scheme, the invention has the following advantages:
the invention adopts the matrix asphalt with the characteristics to prepare the polymer mother liquor, can improve the compatibility of the polymer mother liquor and the matrix asphalt, and prepares the grade-50A asphalt by taking the polymer mother liquor (soft component) and the matrix asphalt (hard component) as raw materials through an asphalt blending technology, thereby not only improving the softening point of the asphalt, reducing the penetration of the asphalt, improving the ductility and ageing resistance of the asphalt, improving the stability of the asphalt, but also greatly reducing the dependence on crude oil in the asphalt preparation process.
Detailed Description
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The invention provides a preparation method of polymer mother liquor, which comprises the steps of mixing raw materials comprising polymer, compatilizer and first matrix asphalt to obtain the polymer mother liquor;
the penetration of the first matrix asphalt at 25 ℃ is 45-55 10 -1 mm, softening point not less than 49.5deg.C, and 10 deg.C ductility not more than 10cm.
The invention adopts the matrix asphalt with the characteristics to prepare the polymer mother solution, can improve the compatibility of the polymer mother solution and the matrix asphalt, and ensures that the polymer mother solution is more suitable for preparing the blended asphalt.
In the present invention, the polymer may be a conventional choice in the art as long as the object of the present invention can be achieved, and according to a preferred embodiment of the present invention, the polymer is selected from at least one of thermoplastic elastomer and styrene-butadiene rubber, preferably styrene-butadiene rubber. By adopting the preferable scheme, the compatibility of the polymer mother solution and the matrix asphalt can be further improved.
In the present invention, the compatibilizing agent may be a conventional choice in the art, and according to a preferred embodiment of the present invention, the compatibilizing agent is selected from at least one of a pump-out oil, a catalytic slurry oil, and an aromatic rubber oil, preferably a pump-out oil. By adopting the preferable scheme, the polymer can be better dissolved, and the compatibility of the polymer mother solution and the matrix asphalt is further improved.
In the present invention, the contents of the polymer, the compatibilizer and the matrix asphalt are not particularly required as long as the object of the present invention can be achieved.
According to a preferred embodiment of the invention, the polymer content is 4 to 8% by weight, based on the total amount of the polymer mother liquor. The content of the compatilizer is 8-12 wt% and the content of the matrix asphalt is 80-88 wt%.
According to a preferred embodiment of the invention, the compatibilizer content is 8 to 12 weight percent based on the total amount of the polymer mother liquor.
According to a preferred embodiment of the invention, the matrix bitumen content is 80 to 88% by weight, based on the total amount of the polymer mother liquor.
By adopting the preferable scheme, the compatibility of the polymer mother solution and the matrix asphalt can be further improved.
According to a preferred embodiment of the present invention, the matrix asphalt comprises 11.6 to 12.2 wt% of saturated fraction, 47.8 to 49.2 wt% of aromatic fraction, 21.6 to 23.8 wt% of colloid and 10.4 to 11.44 wt% of asphaltene, based on the total weight of the polymer mother liquor.
In the present invention, the manner of mixing may be a conventional choice in the art as long as the object of the present invention can be achieved, and according to a preferred embodiment of the present invention, the mixing includes swelling and shearing the raw materials including the polymer, the compatibilizer and the matrix asphalt.
According to a preferred embodiment of the present invention, the swelling conditions include: the temperature is 145-150 ℃ and the time is 30-40 min.
According to a preferred embodiment of the present invention, the shearing conditions include: the temperature is 155-165 ℃, the rotating speed is 4000-8000r/min, and the time is 30-40 min.
The invention provides a polymer mother solution prepared by the method.
The polymer mother solution has good compatibility with matrix asphalt, and is in a viscous state at normal temperature.
The invention provides a preparation method for preparing No. 50A grade asphalt, which comprises the following steps:
preparing a polymer mother liquor according to the method;
blending the polymer mother liquor with second matrix asphalt to obtain No. 50 grade A asphalt;
wherein the penetration of the second matrix asphalt at 25 ℃ is 45-55 10 -1 mm, softening point not less than 49.5deg.C, and 10 deg.C ductility not more than 10cm; preferably, the method comprises the steps of,
the second matrix asphalt is the same as the first matrix asphalt.
The polymer mother liquor and the matrix asphalt with the characteristics are blended to prepare the grade-50A asphalt, so that the softening point of the asphalt can be improved, the penetration of the asphalt can be reduced, the asphalt ductility can be improved, the asphalt stability can be improved, and the dependence on crude oil in the asphalt preparation process can be greatly reduced.
In the present invention, the conditions of the blending may be conventional choices in the art as long as the object of the present invention can be achieved, and according to a preferred embodiment of the present invention, the conditions of the blending include:
the polymer mother liquor is used in an amount of 16 to 25% by weight, preferably 20 to 25% by weight. By adopting the optimization, the asphalt blending efficiency can be obviously improved, and the comprehensive performance of asphalt is further improved on the basis of meeting the quality requirement of No. 50A grade.
According to a preferred embodiment of the invention, the blending temperature is 145℃to 150℃and the blending time is 40 to 50 minutes.
In the present invention, the blending means may be a conventional choice in the art as long as the object of the present invention can be achieved, and according to a preferred embodiment of the present invention, the blending means is a stirring blending, preferably the stirring speed is 300 to 400r/min.
By adopting the optimization, the asphalt blending efficiency can be obviously improved, and the comprehensive performance of asphalt is further improved on the basis of meeting the quality requirement of grade 50A.
The invention provides No. 50A grade asphalt prepared by the preparation method, wherein the content of polymer in the No. 50A grade asphalt is less than or equal to 1%.
The penetration degree of the grade-50A asphalt at 25 ℃ is 40-6010 -1 The softening point is not less than 49 ℃, the ductility at 10 ℃ is not less than 20cm, and the asphalt is in line with the technical rule for highway asphalt pavement constructionIn the range (JTG F40-2004), the requirements for class 50A road asphalt are all met, and the main index richness is large.
The present invention will be described with reference to specific examples, but the scope of the present invention is not limited to the examples.
The related parameter testing method comprises the following steps:
the penetration and penetration index PI were measured according to traffic segment standard T0604, the softening point (round-robin method) was measured according to traffic segment standard T0606, the flash point (COC) was measured according to traffic segment standard T0611, the ductility was measured according to traffic segment standard T0605, the kinetic viscosity at 60 ℃ was measured according to traffic segment standard T0620, the wax content (distillation method) was measured according to traffic segment standard T0615, the density was measured according to traffic segment standard T0603, the solubility was measured according to traffic segment standard T0607, and the film heating test was performed according to traffic segment standard T0609.
Example 1
The first matrix asphalt is the same as the second matrix asphalt, in this embodiment the matrix asphalt has a penetration of 4910 at 25 DEG C -1 mm, softening point of 51.4 ℃, and ductility of 10cm at 10 ℃;
preparation of polymer mother liquor: swelling 32g of polymer Styrene Butadiene Rubber (SBR), 80g of compatilizer extract oil and 688g of matrix asphalt raw material for 35min at 147 ℃; then shearing at high speed at 160 ℃ and 6000r/min for 35min to prepare stable mother liquor. The penetration of the mother liquor at 25 ℃ is 25010 -1 mm。
Preparation of No. 50A asphalt: 300g of the prepared polymer mother liquor and 900g of matrix asphalt are put into a stirrer and stirred for 50min at 145 ℃ and 350r/min to be uniformly mixed, so that No. 50 grade A asphalt is prepared, and after 72 hours of thermal investigation in an oven at 135 ℃, a film oven heating test is carried out, and the result is shown in Table 1.
Example 2
In this embodiment, the second matrix asphalt has a penetration of 5410 at 25℃ -1 mm, softening point 50.6deg.C, 10 ℃ ductility 10cm.
300g of the polymer mother liquor prepared in example 1 and 1200g of the second matrix asphalt of example 2 are placed into a stirrer and stirred for 50min at 145 ℃ and 350r/min to be uniformly mixed, so that No. 50 grade A asphalt is prepared, and after 72 hours of thermal investigation in an oven at 135 ℃, a film oven heating test is carried out, and the results are shown in Table 1.
Example 3
In this embodiment, the second matrix asphalt has a penetration of 5510 at 25℃ -1 mm, softening point of 51.2 ℃, and ductility of 10cm at 10 ℃.
300g of the polymer mother liquor prepared in example 1 and 900g of the second matrix asphalt of example 3 were put into a stirrer and stirred at 145 ℃ and 350r/min for 50min to be uniformly mixed, thus obtaining No. 50 grade A asphalt, and the result is shown in Table 1 after 72 hours of heat investigation in an oven at 135 ℃ and then film oven heating test.
Example 4
The second matrix asphalt has a penetration of 4710 at 25deg.C -1 In the mm range, the softening point is 50.4 ℃, and the ductility at 10 ℃ is 9cm.
300g of the polymer mother liquor prepared in example 1 and 900g of the second matrix asphalt of the example were put into a stirrer and stirred at 145 ℃ and 350r/min for 50min to be uniformly mixed, thus obtaining No. 50 grade A asphalt, and the result is shown in Table 1 after 72 hours of heat investigation in an oven at 135 ℃ and then film oven heating test.
Example 5
Preparation of polymer mother liquor: swelling 32g of a polymeric thermoplastic rubber SBS, 80g of a compatibilizer catalytic slurry and 688g of the first matrix asphalt feedstock of example 1 at 147℃for 35 minutes; then shearing at high speed at 160 ℃ and 6000r/min for 35min to prepare stable mother liquor. The penetration of the mother solution at 25 ℃ is 26510 -1 mm。
300g of the prepared polymer mother liquor and 900g of the second matrix asphalt of example 1 are put into a stirrer and stirred for 40min at 150 ℃ and 350r/min to be uniformly mixed, so that No. 50 grade A asphalt is prepared, and after 72 hours of thermal investigation in an oven at 135 ℃, a film oven heating test is carried out, and the results are shown in Table 1.
Example 6
Preparation of polymer mother liquor: 64g of polymer Styrene Butadiene Rubber (SBR), 96g of compatibilizer oil and 640g of example 1 were pumped outSwelling the first matrix asphalt raw material at 147 ℃ for 35min; then shearing at high speed at 160 ℃ and 6000r/min for 35min to prepare stable mother liquor. The penetration of the mother liquor at 25 ℃ is 25010 -1 mm。
300g of the prepared polymer mother liquor and 2100g of the second matrix asphalt of example 1 are put into a stirrer and stirred for 50min at 145 ℃ and 350n/min to be uniformly mixed, so that No. 50 grade A asphalt is prepared, and after 72 hours of thermal investigation in an oven at 135 ℃, a film oven heating test is carried out, and the result is shown in Table 1.
Example 7
The difference from example 1 is that the polymer used was SBS to give a grade 50A bitumen, which was then subjected to a film oven heating test in an oven at 135℃for 72 hours and the results are shown in Table 1.
Comparative example 1
As in example 1, except that in the preparation of the polymer mother liquor, a pitch of 42.10 penetration at 25℃was used, i.e., the first base pitch -1 mm, softening point 49.0deg.C, 10 deg.C ductility 9cm; the asphalt grade 50A is prepared, and after 72 hours of heat investigation in an oven at 135 ℃, a film oven heating test is carried out, and the results are shown in Table 1.
Comparative example 2
The same as in example 1, except that the first matrix asphalt and the second matrix asphalt were used and the penetration at 25℃was 42 10 -1 mm, softening point 49.0deg.C, 10 deg.C ductility 9cm; the asphalt grade 50A was obtained, and after 72 hours of heat investigation in an oven at 135℃the film oven heating test was performed, the results are shown in Table 1.
Table 1 example test results after thermal storage of samples
As can be seen from the data in Table 1, when examples 1 to 7 are compared with comparative examples 1 to 2, the performance parameters of the No. 50A asphalt of examples 1 to 7 meet the requirements of the Highway asphalt pavement construction technical Specification (JTG F40-2004) on the No. 50A road asphalt, and in particular, the 10 ℃ ductility before and after the heat inspection of the blended No. 50A asphalt of examples 1 to 4 and example 6 is significantly higher than that of examples 5 and example 7 and higher than that of comparative examples 1 to 2; the penetration, ductility at 10c, softening point, etc. of the blended grade 50 grade a asphalt of examples 1-4 and example 6 were significantly higher than the standard, with a margin. The data of examples 1-7 are all data after thermal inspection after baking oven, and further verify that the quality of the prepared samples is stable and acceptable, while the penetration ratio and the 10 ℃ ductility are low and do not meet the requirements after the sample film prepared in comparative examples 1-2 is subjected to a heating test, and the quality stability is poor. Thus, the dependence of the No. 50A asphalt sample prepared by the method on crude oil is greatly reduced.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (10)
1. A preparation method of polymer mother liquor is characterized in that the method comprises the steps of mixing raw materials comprising polymer, compatilizer and first matrix asphalt to obtain the polymer mother liquor;
the penetration of the first matrix asphalt at 25 ℃ is 45-55 10 -1 mm, softening point is not less than49.5 ℃ and the ductility at 10 ℃ is not more than 10cm.
2. The method according to claim 1, wherein the polymer is selected from at least one of thermoplastic rubber and styrene-butadiene rubber, preferably styrene-butadiene rubber.
3. The method according to claim 1 or 2, wherein the compatibilizer is selected from at least one of a pump-out oil, a catalytic slurry oil and an aromatic rubber oil, preferably a pump-out oil.
4. A process according to claim 1 to 3, wherein the polymer mother liquor is present in an amount based on the total amount of the polymer mother liquor,
the content of the polymer is 4-8 wt%; and/or
The content of the compatilizer is 8-12 wt%; and/or
The first matrix asphalt content is 80-88 wt%.
5. The method of any of claims 1-4, wherein the mixing comprises:
swelling and shearing a raw material comprising the polymer, the compatilizer and the first matrix asphalt.
6. The method of claim 5, wherein,
the swelling conditions include: the temperature is 145-150 ℃ and the time is 30-40 min; and/or
The conditions of the shearing include: the temperature is 155-165 ℃, the rotating speed is 4000-8000r/min, and the time is 30-40 min.
7. A polymer mother liquor produced by the method of any one of claims 1-6.
8. A preparation method of No. 50A grade asphalt is characterized by comprising the following steps:
preparing a polymer mother liquor according to the method of any one of claims 1-6;
blending the polymer mother liquor with second matrix asphalt to obtain No. 50 grade A asphalt;
wherein the penetration of the second matrix asphalt at 25 ℃ is 45-55 10 -1 mm, softening point not less than 49.5deg.C, and 10 deg.C ductility not more than 10cm; preferably, the method comprises the steps of,
the second matrix asphalt is the same as the first matrix asphalt.
9. The method of claim 8, wherein the blending conditions comprise:
the polymer mother liquor is used in an amount of 16 to 25% by weight, preferably 20 to 25% by weight; and/or
The blending temperature is 145-150 ℃ and the blending time is 40-50 min; and/or
The blending mode is stirring blending, and the stirring rotating speed is preferably 300-400r/min.
10. The grade 50 a asphalt prepared by the preparation method of any one of claims 8 or 9, wherein the polymer content in the grade 50 a asphalt is 1% or less.
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| CN103589176A (en) * | 2013-11-25 | 2014-02-19 | 中海沥青（泰州）有限责任公司 | High-storage stability rubber powder modified asphalt and preparation method thereof |
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