CN111995822B - Road base surface waterproof layer expansion joint sealing material for railway ballastless track and preparation method thereof - Google Patents
Road base surface waterproof layer expansion joint sealing material for railway ballastless track and preparation method thereof Download PDFInfo
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- CN111995822B CN111995822B CN202010882568.6A CN202010882568A CN111995822B CN 111995822 B CN111995822 B CN 111995822B CN 202010882568 A CN202010882568 A CN 202010882568A CN 111995822 B CN111995822 B CN 111995822B
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
- C08L23/22—Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/09—Ballastless systems
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Civil Engineering (AREA)
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Abstract
The invention discloses a sealing material for an expansion joint of a waterproof layer of a roadbed surface of a railway ballastless track, which comprises the following raw materials in parts by weight: 360 parts of polyisobutylene 330, 70-90 parts of polyether ester, 40-50 parts of polysulfide modified epoxy resin, 20-25 parts of nano carbon black, 5-10 parts of hydroxypropyl methyl cellulose, 1-5 parts of ethylhexyl methoxycinnamate, 5-10 parts of a curing agent, 10-20 parts of a plasticizer, 5-8 parts of a cross-linking agent, 5-10 parts of a water removing agent and 200 parts of a filler 150; the polyisobutylene is a mixture of polyisobutylene with the molecular weight of 800 and polyisobutylene with the molecular weight of 2000, and the mass ratio of the polyisobutylene to the polyisobutylene is 2: 1. The sealing material is added with polyisobutylene, polyether ester and polysulfide modified epoxy resin, wherein the polyisobutylene adopts polyisobutylene with two different molecular weights, and the polysulfide modified epoxy resin and the polyether ester are combined, so that the sealing material has excellent strength and cohesiveness and better elasticity, can bear the tension and compression of an expansion joint caused by expansion and contraction of a base material due to heat, and is suitable for being used in areas with large temperature difference.
Description
Technical Field
The invention relates to a sealing material, in particular to a sealing material for an expansion joint of a waterproof layer of a roadbed surface of a railway ballastless track and a preparation method thereof.
Background
The rails of the high-speed railway can be divided into ballasted rails and ballastless rails according to different structural forms. With the increase of the railway operation speed, the problems of critical speed, stability on the bridge, railway ballast splashing and the like of the ballast track are difficult to solve. Compared with the traditional ballast track, the ballastless track has the advantages of less maintenance workload, good track stability and durability and high smoothness, so that the ballastless track is the main structural form of the high-speed railway in many countries in the world.
The Ballastless track (Ballastless track) is a track structure which adopts integral foundations such as concrete, asphalt mixture and the like to replace a loose gravel road bed, is also called a Ballastless track, and is an advanced track technology in the world today. Compared with a ballast track, the ballastless track avoids the splashing of the ballast, has good smoothness, good stability, long service life, good durability, less maintenance work and high train running speed of more than 350 kilometers. At present, the ballastless track laying mileage in China exceeds 2 thousands of kilometers.
The subgrade is the foundation of the ballastless track, and the smoothness of the ballastless track is seriously affected by the frost heaving problem of the subgrade of the high-speed railway. Therefore, the prevention of frost heaving of the roadbed is a key problem in the construction, operation and maintenance of the high-speed railway. Factors that affect frost heaving of the subgrade include temperature, moisture, and lithology. The roadbed waterproof and drainage measures have problems to cause subsurface infiltration, and are one of important reasons for roadbed frost heaving, and are represented by various structural seams of a roadbed surface, such as caulking materials such as asphalt paste or polyurethane adopted by expansion joints between waterproof layers, and the like, which can be compressed and cracked under the action of thermal expansion and cold contraction of concrete, so that the joint sealing and waterproof failure is caused, the subsurface infiltration is caused, and the occurrence of roadbed frost heaving is accelerated.
The sealing treatment of the expansion joint is an important structural component of the comprehensive waterproof system of the ballastless track of the high-speed railway, and the sealing material of the expansion joint is an important control link for playing a role of a sealing layer. And the high-speed railway is extremely sensitive to the deformation of the ballastless track, particularly the frost heaving deformation of the roadbed, so that a new sealing material suitable for the area with large temperature difference needs to be researched.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the sealing material for the expansion joint of the waterproof layer of the railway ballastless track subgrade surface, which can keep the integrity and the sealing property for a long time and is suitable for being used in areas with large temperature difference.
The invention also aims to provide a preparation method of the expansion joint sealing material for the waterproof layer of the roadbed surface of the railway ballastless track.
One of the purposes of the invention is realized by adopting the following technical scheme:
the sealing material for the expansion joint of the waterproof layer of the roadbed surface of the railway ballastless track comprises the following raw materials in parts by weight: 360 parts of polyisobutylene 330, 70-90 parts of polyether ester, 40-50 parts of polysulfide modified epoxy resin, 20-25 parts of nano carbon black, 5-10 parts of hydroxypropyl methyl cellulose, 1-5 parts of ethylhexyl methoxycinnamate, 5-10 parts of a curing agent, 10-20 parts of a plasticizer, 5-8 parts of a cross-linking agent, 5-10 parts of a water removing agent and 200 parts of a filler 150;
the polyisobutylene is a mixture of polyisobutylene with the molecular weight of 800 and polyisobutylene with the molecular weight of 2000, and the mass ratio of the polyisobutylene to the polyisobutylene is 2: 1.
Further, the polyether ester is a block copolymer consisting of p-hydroxybenzoic acid copolyester serving as a hard segment and polypropylene glycol serving as a soft segment, wherein the mass percentage of the p-hydroxybenzoic acid copolyester is 10-15%.
Further, the curing agent is one of diethylenetriamine, ethylenediamine and diethylaminopropylamine.
Further, the plasticizer is one of dioctyl oxalate, diisodecyl phthalate and tributyl citrate.
Further, the cross-linking agent is one of diallyl phthalate and dipropylene glycol dimethacrylate.
Further, the water removal agent is one of anhydrous calcium chloride and calcium oxide.
Further, the filler is at least one of nano calcium carbonate, nano silicon dioxide and talcum powder.
The second purpose of the invention is realized by adopting the following technical scheme:
the preparation method of the expansion joint sealing material for the waterproof layer of the railway ballastless track subgrade surface comprises the following steps:
(1) stirring and mixing polyisobutylene, polyether ester and polysulfide modified epoxy resin under vacuum, heating to 140-150 ℃, and continuously stirring for 20-30min to obtain a mixed material A;
(2) adding a plasticizer, a cross-linking agent and a curing agent into the mixed material A, cooling to 100-120 ℃ under vacuum, and continuously stirring for 1-2h to obtain a mixed material B;
(3) cooling the mixed material B to 70-80 ℃, adding nano carbon black, hydroxypropyl methyl cellulose, ethylhexyl methoxycinnamate, a water removing agent and a filler, stirring for 30-60min under vacuum, and discharging to obtain the product.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a waterproof layer expansion joint sealing material for a railway ballastless track subgrade surface, which is added with polyisobutylene, polyether ester and polysulfide modified epoxy resin, the three components have synergistic effect to improve the cohesiveness, tensile strength, elongation at break, elastic recovery rate and the like of the sealing material, wherein the polyisobutylene adopts polyisobutylene with two different molecular weights, compared with the polyisobutylene with a single molecular weight, the polyisobutylene has better effect on improving the performance of the sealing material after the polyisobutylene with two different molecular weights, the polysulfide modified epoxy resin and the polyether ester are compounded, not only the sealing material has excellent strength, cohesiveness and better elasticity, can bear the stretching and compression caused by the expansion and contraction of a base material and the vibration caused by the running of a vehicle, and can keep the integrity and the sealing property of the sealing material for a long time, can be used in areas with large temperature difference.
2. The nano carbon black, the hydroxypropyl methyl cellulose and the ethylhexyl methoxycinnamate are added into the waterproof layer expansion joint sealing material for the railway ballastless track subgrade surface to cooperatively play a role in improving the strength and the weather aging resistance of the sealing material, so that the sealing material has durability and weather resistance, is suitable for large temperature difference change, and can play a long-term effective sealing and waterproof effect.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
Example 1
The sealing material for the expansion joint of the waterproof layer of the roadbed surface of the railway ballastless track is prepared from the following raw materials in parts by weight: 220 parts of polyisobutylene with the molecular weight of 800; 110 parts of polyisobutylene with the molecular weight of 2000, 80 parts of polyether ester, 45 parts of polysulfide modified epoxy resin, 22 parts of nano carbon black, 8 parts of hydroxypropyl methyl cellulose, 2 parts of ethylhexyl methoxycinnamate, 8 parts of diethylenetriamine, 15 parts of dioctyl oxalate, 7 parts of diallyl phthalate, 8 parts of anhydrous calcium chloride and 180 parts of nano calcium carbonate;
the polyether ester is a block copolymer consisting of p-hydroxybenzoic acid copolyester serving as a hard segment and polypropylene glycol serving as a soft segment, wherein the mass percentage of the p-hydroxybenzoic acid copolyester is 12%.
The preparation method of the expansion joint sealing material for the waterproof layer of the railway ballastless track subgrade surface comprises the following steps:
(1) stirring and mixing polyisobutylene, polyether ester and polysulfide modified epoxy resin under vacuum, heating to 150 ℃, and continuously stirring for 20min to obtain a mixed material A;
(2) adding dioctyl oxalate, diallyl phthalate and diethylenetriamine into the mixed material A, cooling to 110 ℃ under vacuum, and continuously stirring for 1.5h to obtain a mixed material B;
(3) and (3) cooling the mixed material B to 75 ℃, adding the nano carbon black, hydroxypropyl methyl cellulose, ethylhexyl methoxycinnamate, anhydrous calcium chloride and nano calcium carbonate, stirring for 40min under vacuum, and discharging to obtain the product.
Example 2
The sealing material for the expansion joint of the waterproof layer of the roadbed surface of the railway ballastless track is prepared from the following raw materials in parts by weight: 230 parts of polyisobutylene with the molecular weight of 800; 115 parts of polyisobutylene with the molecular weight of 2000, 70 parts of polyether ester, 40 parts of polysulfide modified epoxy resin, 20 parts of nano carbon black, 5 parts of hydroxypropyl methyl cellulose, 1 part of ethylhexyl methoxycinnamate, 5 parts of ethylenediamine, 10 parts of diisodecyl phthalate, 5 parts of dipropylene glycol dimethacrylate, 5 parts of calcium oxide, 100 parts of nano calcium carbonate and 50 parts of nano silicon dioxide;
the polyether ester is a block copolymer consisting of p-hydroxybenzoic acid copolyester serving as a hard segment and polypropylene glycol serving as a soft segment, wherein the mass percentage of the p-hydroxybenzoic acid copolyester is 10%.
The preparation method of the expansion joint sealing material for the waterproof layer of the railway ballastless track subgrade surface comprises the following steps:
(1) stirring and mixing polyisobutylene, polyether ester and polysulfide modified epoxy resin under vacuum, heating to 140 ℃, and continuously stirring for 30min to obtain a mixed material A;
(2) adding diisodecyl phthalate, dipropylene glycol dimethacrylate and ethylenediamine into the mixed material A, cooling to 100 ℃ under vacuum, and continuously stirring for 2 hours to obtain a mixed material B;
(3) and (3) cooling the mixed material B to 70 ℃, adding the nano carbon black, hydroxypropyl methyl cellulose, ethylhexyl methoxycinnamate, calcium oxide, nano calcium carbonate and nano silicon dioxide, stirring for 60min under vacuum, and discharging to obtain the product.
Example 3
The sealing material for the expansion joint of the waterproof layer of the roadbed surface of the railway ballastless track is prepared from the following raw materials in parts by weight: 240 parts of polyisobutylene with the molecular weight of 800; 120 parts of polyisobutylene with the molecular weight of 2000, 90 parts of polyether ester, 50 parts of polysulfide modified epoxy resin, 25 parts of nano carbon black, 10 parts of hydroxypropyl methyl cellulose, 5 parts of ethylhexyl methoxycinnamate, 10 parts of diethylaminopropylamine, 20 parts of tributyl citrate, 8 parts of diallyl phthalate, 10 parts of anhydrous calcium chloride and 200 parts of talcum powder;
the polyether ester is a block copolymer consisting of p-hydroxybenzoic acid copolyester serving as a hard segment and polypropylene glycol serving as a soft segment, wherein the mass percentage of the p-hydroxybenzoic acid copolyester is 15%.
The preparation method of the expansion joint sealing material for the waterproof layer of the railway ballastless track subgrade surface comprises the following steps:
(1) stirring and mixing polyisobutylene, polyether ester and polysulfide modified epoxy resin under vacuum, heating to 145 ℃, and continuously stirring for 25min to obtain a mixed material A;
(2) adding tributyl citrate, diallyl phthalate and diethylaminopropylamine into the mixed material A, cooling to 120 ℃ under vacuum, and continuously stirring for 1h to obtain a mixed material B;
(3) and (3) cooling the mixed material B to 80 ℃, adding the nano carbon black, hydroxypropyl methyl cellulose, ethylhexyl methoxycinnamate, anhydrous calcium chloride and talcum powder, stirring for 30min under vacuum, and discharging to obtain the product.
Comparative example 1
Comparative example 1 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, and the difference with embodiment 1 is: the same procedure as in example 1 was repeated except that the polyisobutylene having a molecular weight of 800 was omitted and the amount of the polyisobutylene having a molecular weight of 2000 was adjusted to 330 parts.
Comparative example 2
The comparative example 2 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, and the difference from the example 1 is as follows: the same procedure as in example 1 was repeated except that the polyisobutylene having a molecular weight of 2000 was omitted and the amount of the polyisobutylene having a molecular weight of 800 was adjusted to 330 parts.
Comparative example 3
The comparative example 3 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, and the difference from the example 1 is as follows: the procedure of example 1 was repeated except that the molecular weight of the polyisobutylene having a molecular weight of 2000 was adjusted to that of the polyisobutylene having a molecular weight of 2400.
Comparative example 4
The comparative example 4 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, and the difference from the example 1 is as follows: the polyisobutene was omitted and the same as in example 1 was repeated.
Comparative example 5
The comparative example 5 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, and the difference from the example 1 is as follows: the polyether ester was omitted and the procedure was as in example 1.
Comparative example 6
The comparative example 6 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, which is different from that in the embodiment 1 in that: the procedure of example 1 was repeated except that the polysulfide-modified epoxy resin was omitted.
Comparative example 7
The comparative example 7 provides a sealing material for the expansion joint of the waterproof layer of the roadbed of the railway ballastless track, which is different from that of the example 1 in that: the polyisobutene and the polyether ester were omitted and the procedure was as in example 1.
Comparative example 8
The comparative example 8 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, and the difference from the example 1 is as follows: the polysulfide-modified epoxy resin and polyether ester were omitted, and the procedure was as in example 1.
Comparative example 9
The comparative example 9 provides a sealing material for the expansion joint of the waterproof layer of the roadbed of the railway ballastless track, which is different from the sealing material in the embodiment 1 in that: the procedure of example 1 was repeated except that the polysulfide-modified epoxy resin and the polyisobutylene were omitted.
Comparative example 10
The comparative example 10 provides a railway ballastless track subgrade waterproof layer expansion joint sealing material, which is different from that in the example 1 in that: hydroxypropyl methylcellulose and ethylhexyl methoxycinnamate were omitted and the procedure was as in example 1.
Comparative example 11
The comparative example 11 provides a sealing material for the expansion joint of the waterproof layer of the roadbed of the railway ballastless track, which is different from the sealing material in the embodiment 1 in that: the nano carbon black was omitted and the rest was the same as in example 1.
The sealing materials of example 1 and comparative examples 1 to 9 were subjected to performance tests in which tensile strength and elongation at break were measured in accordance with the GB/T528-2009 method and properties such as elastic recovery, elastic modulus, and tack-free adhesion were measured in accordance with the GB/T13477 series of standards, and the results are shown in Table 1.
TABLE 1
The sealing materials of example 1, comparative example 10 and comparative example 11 were irradiated with ultraviolet rays at 340nm for 50 days (24 hours per day), and the change in the tensile strength of the sealing material and the aging of the material before the start of irradiation and after 50 days of irradiation were recorded, and the results are shown in Table 2.
TABLE 2
As can be seen from Table 1, the sealing materials of example 1 are superior in each property to those of comparative examples 1 to 9, and the sealing materials of example 1 are still low in elastic modulus at-40 ℃, good in low-temperature toughness and free of surface cracks. In comparative examples 1 to 3, the molecular weight of the added polyisobutylene was adjusted, and the properties of the sealing material obtained after the adjustment, such as tensile strength, elongation at break, elastic recovery rate and the like, were all inferior to those of example 1. The sealing material obtained by omitting one or more of polysulfide modified epoxy resin, polyisobutylene and polyether ester in comparative examples 4 to 9 is also inferior to that of example 1, so that the polyisobutylene with molecular weight of 800, the polyisobutylene with molecular weight of 2000, the polysulfide modified epoxy resin and the polyether ester are selected for compounding use, and the synergistic effect among the components not only enables the sealing material to have excellent tensile strength and cohesiveness, but also has better elasticity, can bear the stretching and compression of an expansion joint caused by thermal expansion and cold contraction of a base material and the vibration caused by vehicle operation, and is beneficial to the sealing material to keep the integrity and the sealing property and prolong the service life.
As is clear from Table 2, the sealing material of example 1 showed less decrease in tensile strength after the irradiation of ultraviolet rays for a long period of time, and the surface of the material was free from aging and had good sealing properties. In comparative example 10 and comparative example 11, hydroxypropyl methylcellulose, ethylhexyl methoxycinnamate, and nano carbon black were omitted, respectively, and the tensile strength of the sealing material was deteriorated after irradiation with ultraviolet light for 50 days, and the surface aging was severe, cracks occurred, the sealing property was lowered, and the weather resistance was deteriorated. The invention obviously improves the weather resistance and the ageing resistance of the material by adding the hydroxypropyl methyl cellulose, the ethylhexyl methoxycinnamate and the nano carbon black into the sealing material, adapts to larger temperature difference change and can play a long-term effective sealing and waterproof effect.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (8)
1. The sealing material for the expansion joint of the waterproof layer of the roadbed surface of the railway ballastless track is characterized by comprising the following raw materials in parts by weight: 360 parts of polyisobutylene 330, 70-90 parts of polyether ester, 40-50 parts of polysulfide modified epoxy resin, 20-25 parts of nano carbon black, 5-10 parts of hydroxypropyl methyl cellulose, 1-5 parts of ethylhexyl methoxycinnamate, 5-10 parts of a curing agent, 10-20 parts of a plasticizer, 5-8 parts of a cross-linking agent, 5-10 parts of a water removing agent and 200 parts of a filler 150;
the polyisobutylene is a mixture of polyisobutylene with the molecular weight of 800 and polyisobutylene with the molecular weight of 2000, and the mass ratio of the polyisobutylene to the polyisobutylene is 2: 1.
2. The material for sealing the expansion joint of the waterproof layer on the railway ballastless track road base surface according to claim 1, wherein the polyether ester is a block copolymer consisting of copolyester p-hydroxybenzoate as a hard segment and polypropylene glycol as a soft segment, and the mass percentage of the copolyester p-hydroxybenzoate is 10-15%.
3. The material for sealing an expansion joint of a waterproof layer of a railway ballastless track subgrade surface according to claim 1, wherein the curing agent is one of diethylenetriamine, ethylenediamine and diethylaminopropylamine.
4. The material for sealing an expansion joint of a waterproof layer of a railway ballastless track subgrade surface according to claim 1, wherein the plasticizer is one of dioctyl oxalate, diisodecyl phthalate and tributyl citrate.
5. The material for sealing an expansion joint of a waterproof layer of a railway ballastless track base surface according to claim 1, wherein the cross-linking agent is one of diallyl phthalate and dipropylene glycol dimethacrylate.
6. The material for sealing an expansion joint of a waterproof layer of a railway ballastless track subgrade surface according to claim 1, wherein the water removing agent is one of anhydrous calcium chloride and calcium oxide.
7. The material for sealing an expansion joint of a waterproof layer of a railway ballastless track subgrade surface according to claim 1, wherein the filler is at least one of nano calcium carbonate, nano silica and talcum powder.
8. The preparation method of the waterproof layer expansion joint sealing material for the roadbed surfaces of the railway ballastless tracks as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
(1) stirring and mixing polyisobutylene, polyether ester and polysulfide modified epoxy resin under vacuum, heating to 140-150 ℃, and continuously stirring for 20-30min to obtain a mixed material A;
(2) adding a plasticizer, a cross-linking agent and a curing agent into the mixed material A, cooling to 100-120 ℃ under vacuum, and continuously stirring for 1-2h to obtain a mixed material B;
(3) cooling the mixed material B to 70-80 ℃, adding nano carbon black, hydroxypropyl methyl cellulose, ethylhexyl methoxycinnamate, a water removing agent and a filler, stirring for 30-60min under vacuum, and discharging to obtain the product.
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| CN202010882568.6A CN111995822B (en) | 2020-08-28 | 2020-08-28 | Road base surface waterproof layer expansion joint sealing material for railway ballastless track and preparation method thereof |
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| CN202010882568.6A CN111995822B (en) | 2020-08-28 | 2020-08-28 | Road base surface waterproof layer expansion joint sealing material for railway ballastless track and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992633A (en) * | 2014-05-08 | 2014-08-20 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane caulking material for expansion joints of ballastless track of high speed railway |
| CN108611041A (en) * | 2018-05-29 | 2018-10-02 | 河北金坤工程材料有限公司 | A kind of polyurethane caulking glue and preparation method thereof applied to high speed railway fragments-free railway |
| CN109401638A (en) * | 2018-08-31 | 2019-03-01 | 重庆交通大学 | Railway ballastless track road bed waterproof layer expansion joint sealing material |
| KR101961622B1 (en) * | 2018-10-05 | 2019-03-26 | (주)대한하이텍건설 | An Adhesive Composition for Elastic Sealing Material and Construction Methods Using Thereof |
-
2020
- 2020-08-28 CN CN202010882568.6A patent/CN111995822B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103992633A (en) * | 2014-05-08 | 2014-08-20 | 中国铁道科学研究院铁道建筑研究所 | Polyurethane caulking material for expansion joints of ballastless track of high speed railway |
| CN108611041A (en) * | 2018-05-29 | 2018-10-02 | 河北金坤工程材料有限公司 | A kind of polyurethane caulking glue and preparation method thereof applied to high speed railway fragments-free railway |
| CN109401638A (en) * | 2018-08-31 | 2019-03-01 | 重庆交通大学 | Railway ballastless track road bed waterproof layer expansion joint sealing material |
| KR101961622B1 (en) * | 2018-10-05 | 2019-03-26 | (주)대한하이텍건설 | An Adhesive Composition for Elastic Sealing Material and Construction Methods Using Thereof |
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