CN112694836A - Waterproof coating for high-speed rail and preparation method thereof - Google Patents
Waterproof coating for high-speed rail and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
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- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention discloses a waterproof coating for a high-speed rail, which is prepared from the following components in parts by weight: 10-15 parts of epoxidized SBS, 35-45 parts of amino-terminated hyperbranched polysiloxane, 3-5 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 1-3 parts of phosphorus pentoxide, 3-5 parts of silicon nitride nanosheet, 1-2 parts of coupling agent, 20-30 parts of inorganic filler, 2-4 parts of defoaming agent and 1-3 parts of flatting agent. The invention also provides a preparation method of the waterproof coating for the high-speed rail. The waterproof coating for the high-speed rail disclosed by the invention has the advantages of obvious waterproof effect, good comprehensive performance, high bonding strength with a base material, good weather resistance, mechanical property and durability, and excellent performance stability and heat resistance.
Description
Technical Field
The invention relates to the technical field of coatings, and particularly relates to a waterproof coating for a high-speed rail and a preparation method thereof.
Background
With the vigorous development of railway construction, especially high-speed rail industry, railway system technology is also continuously developed, wherein one of the most important technologies, namely railway system waterproof technology, is mainly realized by a waterproof coating special for high-speed rails. The waterproof coating for the high-speed rail has the effects of isolating moisture on one hand and enhancing the capacity of resisting external load and deformation on the other hand.
At present, the common high-speed rail waterproof coating has the defects of poor heat resistance, narrow applicable temperature range, poor chemical resistance, certain brittleness, cracking under high impact energy, insufficient surface hardness and easy scratching by hard objects; the solid content is low, the drying time is long, the low-temperature flexibility is poor, and the requirement of the durability quality standard of the bridge structure cannot be met; the toughness and heat resistance are required to be further improved, and the paint is easy to yellow and affects the appearance; high price and high requirement on spraying technology. In addition, the high-speed rail waterproof coating on the market also has the defects of poor weather resistance, insufficient storage and transportation stability and short service life.
The Chinese invention patent with the application number of 201610667275.X discloses a waterproof coating for a high-speed rail and a preparation method thereof, wherein the coating comprises two parts: the component A super-hydrophobic material and the component B coating composition are prepared by covering 2-10 parts of graphene, 15-30 parts of mixed acid solution, 5-12 parts of aminoethoxysilane-toluene mixed solution, 5-12 parts of fluorine-containing acrylate and 20-35 parts of methanol solution on the surface of graphene by a dip-coating method according to the parts by mass; the component B coating composition is prepared from 55-70 parts of methacrylate, 10-25 parts of acrylate, 2-5 parts of functional monomer, 2-10 parts of super-hydrophobic material, 1-5 parts of film-forming auxiliary agent, 1-5 parts of plasticizer, 0.8-1.5 parts of emulsifier, 0.5-1 part of dispersant, 0.5-1 part of preservative, 0.05-1 part of defoamer and 0.05-0.1 part of initiator; the waterproof coating is prepared by mixing the component A super-hydrophobic material and the component B coating composition. According to the invention, the super-hydrophobic material obtained by adding the modified graphene improves the heat resistance, chemical resistance and hardness of the Polymethacrylate (PMMA) while improving the water resistance of the coating. However, the coating has complex components and higher preparation cost, and the environmental protection performance and the comprehensive performance are required to be further improved.
Therefore, the waterproof coating for the high-speed rail, which has the advantages of obvious waterproof effect, good comprehensive performance, high bonding strength with a base material, good weather resistance, mechanical property and durability, excellent performance stability and heat resistance, is developed, meets the market demand, has wide market value and application prospect, and plays a very important role in promoting the development of the high-speed rail industry.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the waterproof coating for the high-speed rail, which has the advantages of obvious waterproof effect, good comprehensive performance, high bonding strength with a base material, good weather resistance, mechanical properties and durability, excellent performance stability and excellent heat resistance. Meanwhile, the invention also provides a preparation method of the waterproof coating for the high-speed rail, and the preparation method is simple, convenient to construct, low in equipment requirement, low in energy consumption, high in preparation efficiency and suitable for continuous large-scale production.
In order to achieve the aim, the invention adopts the technical scheme that the waterproof coating for the high-speed rail is prepared from the following components in parts by weight: 10-15 parts of epoxidized SBS, 35-45 parts of amino-terminated hyperbranched polysiloxane, 3-5 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 1-3 parts of phosphorus pentoxide, 3-5 parts of silicon nitride nanosheet, 1-2 parts of coupling agent, 20-30 parts of inorganic filler, 2-4 parts of defoaming agent and 1-3 parts of flatting agent.
Preferably, the leveling agent is one or more of a polyacrylate leveling agent, a cellulose acetate butyrate leveling agent and a polyvinyl butyral leveling agent.
Preferably, the antifoaming agent is one or more of tributyl phosphate, antifoaming agent dele 3100 and antifoaming agent BYK 088.
Preferably, the inorganic filler is at least one of titanium dioxide, talcum powder, calcium carbonate and attapulgite.
Preferably, the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH 570.
Preferably, the silicon nitride nanosheet is prepared according to the preparation method of the silicon nitride nanosheet in the embodiment 1 of the chinese patent with the application number of 201911091227.0.
Preferably, the preparation method of the hydroxysulfonic acid group co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 5-7 hours at 45-65 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 3-6 times, and then performing rotary evaporation to remove residual diethyl ether to obtain the hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole.
Preferably, the molar ratio of the N, N' -sulfuryl diimidazole to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:2 (10-15).
Preferably, the organic solvent is any one of acetone, diethyl ether and dichloromethane.
Preferably, the amino-terminated hyperbranched polysiloxane is the amino-terminated hyperbranched polysiloxane HPSi-NH related to the Chinese patent application No. 201910338290.3 in example 12The amino-terminated hyperbranched polysiloxane prepared by the preparation method.
Preferably, the epoxidized SBS is epoxidized SBS prepared by the method for preparing epoxidized SBS (eSBS46) according to chinese invention patent example 1, application No. 201810344598.4.
Another object of the present invention is to provide a method for preparing the waterproof coating for high-speed rails, which comprises the following steps: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a sieve with 220 meshes of 180 meshes to obtain the waterproof coating for the high-speed rail.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1) the preparation method of the waterproof coating for the high-speed rail, provided by the invention, is simple, convenient to construct, low in equipment requirement, low in energy consumption, high in preparation efficiency and suitable for continuous large-scale production.
2) The waterproof coating for the high-speed rail provided by the invention overcomes the defects that the existing waterproof coating for the high-speed rail is poor in heat resistance, narrow in applicable temperature range, poor in chemical resistance, certain in brittleness, capable of being broken under high impact energy, insufficient in surface hardness and easy to scratch by hard objects; the solid content is low, the drying time is long, the low-temperature flexibility is poor, and the requirement of the durability quality standard of the bridge structure cannot be met; the toughness and heat resistance are required to be further improved, and the paint is easy to yellow and affects the appearance; high price and high requirement on spraying technology; the defects of poor weather resistance, insufficient storage and transportation stability and short service life of the waterproof coating for the high-speed rail on the market are overcome; through the synergistic effect of the components, the prepared waterproof coating for the high-speed rail has the advantages of obvious waterproof effect, good comprehensive performance, high bonding strength with a base material, good weather resistance, mechanical property and durability, and excellent performance stability and heat resistance.
3) According to the waterproof coating for the high-speed rail, the waterproof performance of SBS, hyperbranched polysiloxane, sulfuryl imidazole and silicon nitride nanosheets is combined with the coating film, so that the waterproof effect of the waterproof coating is remarkable; epoxy groups on epoxy SBS in the paint components are easy to generate epoxy ring-opening reaction with amino groups on amino-terminated hyperbranched polysiloxane in the curing process of the paint, benzene rings on the epoxy SBS are easy to generate crosslinking reaction with sulfonic groups on hydroxyl sulfonic groups co-modified N, N '-sulfuryl diimidazole under the action of phosphorus pentoxide, and meanwhile, hydroxyl groups on the hydroxyl sulfonic groups co-modified N, N' -sulfuryl diimidazole can also generate chemical reaction with epoxy groups on the epoxy SBS, so that the components are connected into a three-dimensional network structure by chemical bonds, the comprehensive performance and the performance stability of the paint film are effectively improved, the service life of the paint film is effectively prolonged, and the waterproofness, the mechanical property and the weatherability of the paint film are remarkably improved.
4) According to the waterproof coating for the high-speed rail, the epoxidized SBS, the amino-terminated hyperbranched polysiloxane and the hydroxy sulfonic group co-modified N, N ' -sulfuryl diimidazole are adopted to act synergistically to form a film forming substance, so that a film simultaneously contains SBS, polysiloxane and sulfuryl diimidazole structures, the toughness of the film is sufficient, the mechanical property and the flame retardance are good, and the SBS, polysiloxane and the modified N, N ' -sulfuryl diimidazole structures can effectively enhance the bonding property of the SBS, polysiloxane and modified N, N ' -sulfuryl diimidazole structures with a base material.
5) The waterproof coating for the high-speed rail, provided by the invention, does not use any organic solvent, has better environmental protection performance, and can improve the mechanical property of a coating film, the wear resistance, the crack resistance and the water resistance of the coating film by adding the silicon nitride nanosheet, so that the comprehensive performance of the material is better. The hydroxyl sulfonic group co-modifies hydrophilic hydroxyl on the N, N' -sulfuryl diimidazole and hydroxyl generated after the reaction of the epoxy group, so that the effects of retaining water and enhancing the bonding strength can be achieved, the drying crack and the falling off of the coating are effectively avoided, the performance stability is improved, and the service life is prolonged.
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
The epoxidized SBS in the following embodiment of the invention is the epoxidized SBS prepared according to the preparation method of the epoxidized SBS (eBSS 46) in the Chinese patent application No. 201810344598.4 in the embodiment 1; the silicon nitride nanosheet is prepared according to a preparation method of the silicon nitride nanosheet in the embodiment 1 of the Chinese patent with the application number of 201911091227.0; the amino-terminated hyperbranched polysiloxane is prepared by the preparation method of the amino-terminated hyperbranched polysiloxane HPSi-NH2 in the patent example 1 of Chinese invention with the application number of 201910338290.3; the other raw materials used were all purchased commercially.
Example 1
The waterproof coating for the high-speed rail is prepared from the following components in parts by weight: 10 parts of epoxidized SBS, 35 parts of amino-terminated hyperbranched polysiloxane, 3 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 1 part of phosphorus pentoxide, 3 parts of silicon nitride nanosheet, 1 part of coupling agent, 20 parts of inorganic filler, 2 parts of defoaming agent and 1 part of flatting agent.
The flatting agent is a polyacrylate flatting agent; the defoaming agent is tributyl phosphate; the inorganic filler is titanium dioxide; the coupling agent is a silane coupling agent KH 550.
The preparation method of the hydroxysulfonic co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 5 hours at 45 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 3 times, and then performing rotary evaporation to remove residual diethyl ether to obtain hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole; the molar ratio of the N, N' -sulfuryl diimidazole to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:2: 10; the organic solvent is acetone.
The preparation method of the waterproof coating for the high-speed rail is characterized by comprising the following steps of: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a 180-mesh sieve to obtain the waterproof coating for the high-speed rail.
Example 2
The waterproof coating for the high-speed rail is prepared from the following components in parts by weight: 12 parts of epoxidized SBS, 37 parts of amino-terminated hyperbranched polysiloxane, 3.5 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 1.5 parts of phosphorus pentoxide, 3.5 parts of silicon nitride nanosheet, 1.2 parts of coupling agent, 23 parts of inorganic filler, 2.5 parts of defoaming agent and 1.5 parts of flatting agent.
The leveling agent is cellulose acetate butyrate leveling agent; the antifoaming agent is antifoaming agent delete 3100; the inorganic filler is talcum powder; the coupling agent is a silane coupling agent KH 560.
The preparation method of the hydroxysulfonic co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 5.5 hours at 50 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 4 times, and then performing rotary evaporation to remove residual diethyl ether to obtain hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole; the molar ratio of the N, N' -sulfuryl diimidazole to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:2: 12; the organic solvent is diethyl ether.
The preparation method of the waterproof coating for the high-speed rail is characterized by comprising the following steps of: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a 190-mesh sieve to obtain the waterproof coating for the high-speed rail.
Example 3
The waterproof coating for the high-speed rail is prepared from the following components in parts by weight: 13 parts of epoxidized SBS, 40 parts of amino-terminated hyperbranched polysiloxane, 4 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 2 parts of phosphorus pentoxide, 4 parts of silicon nitride nanosheet, 1.5 parts of coupling agent, 25 parts of inorganic filler, 3 parts of defoaming agent and 2 parts of flatting agent.
The flatting agent is a polyvinyl butyral flatting agent; the defoaming agent is a defoaming agent BYK 088; the inorganic filler is double flying powder; the coupling agent is a silane coupling agent KH 570.
The preparation method of the hydroxysulfonic co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 6 hours at 55 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 5 times, and then performing rotary evaporation to remove residual diethyl ether to obtain hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole; the molar ratio of the N, N' -sulfuryl diimidazole to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:2: 13; the organic solvent is dichloromethane.
The preparation method of the waterproof coating for the high-speed rail is characterized by comprising the following steps of: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a 200-mesh sieve to obtain the waterproof coating for the high-speed rail.
Example 4
The waterproof coating for the high-speed rail is prepared from the following components in parts by weight: 14 parts of epoxidized SBS, 43 parts of amino-terminated hyperbranched polysiloxane, 4.5 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 2.5 parts of phosphorus pentoxide, 4.5 parts of silicon nitride nanosheet, 1.8 parts of coupling agent, 28 parts of inorganic filler, 3.5 parts of defoaming agent and 2.5 parts of flatting agent.
The flatting agent is formed by mixing a polyacrylate flatting agent, a cellulose acetate butyrate flatting agent and a polyvinyl butyral flatting agent according to the mass ratio of 1:3: 5; the defoaming agent is formed by mixing tributyl phosphate, a defoaming agent Demodex 3100 and a defoaming agent BYK088 according to the mass ratio of 2:1: 3; the inorganic filler is formed by mixing titanium dioxide, talcum powder, double-flying powder and attapulgite according to the mass ratio of 2:3:5: 2; the coupling agent is formed by mixing a silane coupling agent KH550, a silane coupling agent KH560 and a silane coupling agent KH570 according to the mass ratio of 1:2: 3.
The preparation method of the hydroxysulfonic co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 6.5 hours at 63 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 5 times, and then performing rotary evaporation to remove residual diethyl ether to obtain hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole; the molar ratio of the N, N' -sulfuryl diimidazole to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:2: 14; the organic solvent is acetone.
The preparation method of the waterproof coating for the high-speed rail is characterized by comprising the following steps of: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a 210-mesh sieve to obtain the waterproof coating for the high-speed rail.
Example 5
The waterproof coating for the high-speed rail is prepared from the following components in parts by weight: 15 parts of epoxidized SBS, 45 parts of amino-terminated hyperbranched polysiloxane, 5 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 3 parts of phosphorus pentoxide, 5 parts of silicon nitride nanosheet, 2 parts of coupling agent, 30 parts of inorganic filler, 4 parts of defoaming agent and 3 parts of flatting agent.
The flatting agent is a polyacrylate flatting agent; the defoaming agent is a defoaming agent BYK 088; the inorganic filler is double flying powder; the coupling agent is a silane coupling agent KH 570.
The preparation method of the hydroxysulfonic co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 7 hours at 65 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 6 times, and then performing rotary evaporation to remove residual diethyl ether to obtain hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole; the molar ratio of the N, N' -sulfuryl diimidazole to the 3-chloro-2-hydroxypropanesulfonic acid to the organic solvent is 1:2: 15; the organic solvent is diethyl ether.
The preparation method of the waterproof coating for the high-speed rail is characterized by comprising the following steps of: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a 220-mesh sieve to obtain the waterproof coating for the high-speed rail.
Comparative example 1
This example provides a waterproof coating material for high-speed rail, which has the same formulation and preparation method as those of example 1, except that no hydroxysulfonic acid group is added to co-modify N, N' -sulfuryl diimidazole.
Comparative example 2
The present example provides a waterproof coating material for high-speed rail, whose formulation and preparation method are substantially the same as those of example 1, except that no silicon nitride nanosheet is added.
Comparative example 3
This example provides a waterproof coating for high-speed rail, which is formulated and prepared in substantially the same manner as in example 1, except that epoxidized SBS is not added.
Comparative example 4
This example provides a waterproof coating for high-speed rail, which has the same formulation and preparation method as example 1, except that no amino-terminated hyperbranched polysiloxane was added.
Comparative example 5
This example provides a waterproof coating material for high-speed rail, which has substantially the same formulation and preparation method as in example 1, except that N, N '-thiobisimidazole is co-modified with N, N' -thiobisimidazole in place of a hydroxysulfonic acid group.
In order to further illustrate the beneficial technical effects of the waterproof coating for high-speed rails according to the embodiments of the present invention, the performance of the waterproof coating for high-speed rails according to the embodiments 1 to 5 and the comparative examples 1 to 5 of the present invention was tested, and the test methods and test results are shown in table 1; wherein the weather resistance is measured by performing xenon lamp test for 2000hrs according to ISO11341-04 and statistically calculating the gloss retention rate; impact resistance was measured according to ASTM D2794-04, impact force was 2.5Nm, and cracking was observed.
As can be seen from table 1, the waterproof coating for high-speed rail disclosed in the examples of the present invention has more excellent impact resistance and weather resistance, higher adhesion and hot hardness, and more excellent water resistance and water resistance compared to the comparative products; this is a result of the synergistic effect of the components.
TABLE 1
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The waterproof coating for the high-speed rail is characterized by being prepared from the following components in parts by weight: 10-15 parts of epoxidized SBS, 35-45 parts of amino-terminated hyperbranched polysiloxane, 3-5 parts of hydroxyl sulfonic group co-modified N, N' -sulfuryl diimidazole, 1-3 parts of phosphorus pentoxide, 3-5 parts of silicon nitride nanosheet, 1-2 parts of coupling agent, 20-30 parts of inorganic filler, 2-4 parts of defoaming agent and 1-3 parts of flatting agent.
2. The waterproof coating material for high-speed rails as claimed in claim 1, wherein the leveling agent is one or more of a polyacrylate leveling agent, a cellulose acetate butyrate leveling agent and a polyvinyl butyral leveling agent.
3. The waterproof coating material for a high-speed rail according to claim 1, wherein the antifoaming agent is one or more of tributyl phosphate, antifoaming agent D3100, and antifoaming agent BYK 088.
4. The waterproof coating for high-speed rails according to claim 1, wherein the inorganic filler is at least one of titanium dioxide, talc, calcium carbonate, and attapulgite.
5. The waterproof coating material for high-speed rails according to claim 1, wherein the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560, and a silane coupling agent KH 570.
6. The waterproof coating for high-speed rails as claimed in claim 1, wherein the preparation method of the hydroxysulfonic acid group co-modified N, N' -sulfuryl diimidazole comprises the following steps: adding N, N '-sulfuryl diimidazole and 3-chloro-2-hydroxypropanesulfonic acid into an organic solvent, stirring and reacting for 5-7 hours at 45-65 ℃, then performing rotary evaporation to remove the solvent, washing the crude product with diethyl ether for 3-6 times, and then performing rotary evaporation to remove residual diethyl ether to obtain the hydroxysulfonic group co-modified N, N' -sulfuryl diimidazole.
7. The waterproof coating material for high-speed rails according to claim 6, wherein the molar ratio of N, N' -sulfuryl diimidazole, 3-chloro-2-hydroxypropanesulfonic acid, and organic solvent is 1:2 (10-15).
8. The waterproof paint for high-speed rails according to claim 6, wherein the organic solvent is any one of acetone, diethyl ether and dichloromethane.
9. The method for preparing the waterproof coating material for high-speed rail according to any one of claims 1 to 8, comprising the steps of: uniformly mixing the components in parts by weight, adding the mixture into a double-screw extruder for extrusion, crushing the mixture into micro powder by a plastic crusher, and sieving the micro powder by a sieve with 220 meshes of 180 meshes to obtain the waterproof coating for the high-speed rail.
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| CN202011530427.4A CN112694836A (en) | 2020-12-22 | 2020-12-22 | Waterproof coating for high-speed rail and preparation method thereof |
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