CN115466571A - Water-based asphalt-based waterproof coating and preparation method thereof - Google Patents
Water-based asphalt-based waterproof coating 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
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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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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Abstract
The invention belongs to the field of waterproof coatings, and discloses a water-based asphalt-based waterproof coating and a preparation method thereof. The waterproof coating comprises the following components: asphalt, anti-rutting master batches, petroleum resin, fischer-Tropsch wax, organic montmorillonite, anionic emulsifier, water, polystyrene butyl acrylate emulsion, silica sol, dispersing agent, pH regulator, silane coupling agent, heavy calcium carbonate, styrene-butadiene latex and other auxiliary agents. The invention improves the heat resistance, high-temperature shear strength and water resistance of the water-based asphalt-based waterproof coating, and when the water-based asphalt-based waterproof coating is used as a waterproof coating for roads and bridges, the bonding strength between the water-based asphalt-based waterproof coating and a cement base layer and the bonding strength between the water-based asphalt-based waterproof coating and an asphalt surface layer are improved by 200 percent, the shear strength at 50 ℃ is improved by 300 percent, and the shear strength at 70 ℃ is improved by 400 percent.
Description
Technical Field
The invention belongs to the field of waterproof coatings, and particularly relates to a water-based asphalt-based waterproof coating and a preparation method thereof.
Background
Waterproof coating for roads and bridges on the market has the problems of low bonding strength with a cement base layer and an asphalt surface layer, insufficient high-temperature shear strength and poor water resistance, and specifically comprises the following components in percentage by weight: the non-asphalt-based rigid waterproof coating has excellent high-temperature performance, but is easy to crack at low temperature and has insufficient bonding strength with an asphalt surface layer; the shear strength of the asphalt-based waterproof coating under the action of high temperature is not enough, so that interlaminar shear failure is easy to occur; the water-based asphalt-based waterproof coating material tends to have poor water resistance, thereby causing a decrease in strength after being soaked in water for a long time.
According to market research, the main failure modes of the road and bridge waterproof coating are bonding failure and shearing transition damage under the action of high-temperature (road surface temperature is over 60 ℃) heavy load, so that a new modified system used as the asphalt-based waterproof coating for the road and bridge is urgently needed to be provided.
Disclosure of Invention
The invention aims to provide a water-based asphalt-based waterproof coating and a preparation method thereof aiming at the defects of the prior art. The invention improves the heat resistance, high-temperature shear strength, high-temperature bonding strength and water resistance of the water-based asphalt-based waterproof coating, and when the water-based asphalt-based waterproof coating is used as a waterproof coating for roads and bridges, the bonding strength between the water-based asphalt-based waterproof coating and a cement base layer and an asphalt surface layer is improved by 200%, the shear strength of a combined structure at 50 ℃ is improved by 300%, and the shear strength at 70 ℃ is improved by 400%.
In order to achieve the above object, a first aspect of the present invention provides an aqueous asphalt-based waterproof coating material, comprising the following components:
asphalt, anti-rutting master batches, petroleum resin, fischer-Tropsch wax, organic montmorillonite, anionic emulsifier, water, polystyrene butyl acrylate emulsion, silica sol, dispersing agent, pH regulator, silane coupling agent, heavy calcium carbonate, styrene-butadiene latex and other auxiliary agents.
According to the present invention, preferably, the waterproof coating material comprises the following components in parts by weight: 20-30 parts of asphalt, 1-8 parts of anti-rutting master batch, 1-5 parts of petroleum resin, 0.5-5 parts of Fischer-Tropsch wax, 5-10 parts of organic montmorillonite, 0.5-2.5 parts of anionic emulsifier, 20-30 parts of water, 3-12 parts of polystyrene butyl acrylate emulsion, 5-12 parts of silica sol, 0.1-0.5 part of dispersant, 0.1-1 part of pH regulator, 0.1-0.5 part of silane coupling agent, 1-5 parts of heavy calcium carbonate, 15-30 parts of styrene-butadiene latex and 0.1-3 parts of other auxiliary agents.
Further preferably, the waterproof coating comprises the following components in parts by weight: 22-30 parts of asphalt, 2-8 parts of anti-rutting master batch, 1-4 parts of petroleum resin, 1-5 parts of Fischer-Tropsch wax, 7-10 parts of organic montmorillonite, 0.5-2.5 parts of anionic emulsifier, 20-30 parts of water, 3-10 parts of polystyrene butyl acrylate emulsion, 5-12 parts of silica sol, 0.1-0.5 part of dispersant, 0.1-1 part of pH regulator, 0.1-0.5 part of silane coupling agent, 1-5 parts of heavy calcium carbonate, 15-30 parts of styrene-butadiene latex and 0.1-3 parts of other auxiliary agents.
According to the invention, preferably, the asphalt is 70# A grade petroleum asphalt, preferably at least one of Jingbo 70# A grade petroleum asphalt, medium petrochemical 70# A grade petroleum asphalt and medium petroleum 70# A grade petroleum asphalt.
In the invention, the anti-rutting master batch can improve the viscosity of the modified asphalt so as to further improve the high-temperature shear resistance of the waterproof coating.
In the present invention, the petroleum resin is a tackifying effect, and can be mixed with other components to improve the high-temperature shear resistance of the waterproof coating material and improve the compatibility of the components, and according to the present invention, preferably, the petroleum resin is at least one of a C9 petroleum resin, a coumarone resin, and a terpene resin.
According to the present invention, preferably, the anionic emulsifier is at least one of sodium dodecyl sulfonate, sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium dodecyl polyoxyethylene ether sulfate.
According to the invention, preferably, the silica sol has a silica content of 20-45%, a silica particle size of 5-10nm, and a pH of 8-11.
According to the present invention, preferably, the silane coupling agent is gamma-glycidoxypropyltrimethoxysilane and/or N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane.
According to the present invention, preferably, the ground calcium carbonate has a particle size of 700 to 900 mesh.
According to the present invention, preferably, the other auxiliary agents comprise the following components in parts by weight: 0.1-0.4 part of film-forming additive, 0.1-0.5 part of defoaming agent and 0.5-2 parts of thickening agent.
According to the present invention, preferably, the coalescing agent is at least one of lauryl alcohol ester, ethylene glycol butyl ether and hexylene glycol butyl ether acetate.
According to the present invention, preferably, the antifoaming agent is at least one of a polydimethylsiloxane antifoaming agent, a polyether modified silicon antifoaming agent, and a mineral oil antifoaming agent.
According to the present invention, preferably, the thickener is at least one of a hydrophobically modified alkali-soluble emulsion-type thickener, hydroxyethyl cellulose, and a polyacrylate thickener.
The second aspect of the present invention provides a preparation method of the water-based asphalt-based waterproof coating, which comprises the following steps:
s1: preparing modified asphalt: heating and melting the asphalt to a flowing state to obtain molten asphalt; mixing and stirring the molten asphalt, the anti-rutting master batch, the petroleum resin, the Fischer-Tropsch wax and the organic montmorillonite soil to obtain the modified asphalt;
s2: preparing a soap solution: mixing and stirring the anionic emulsifier and water to obtain the soap solution;
s3: preparing emulsified asphalt: mixing the modified asphalt with the soap solution, and dispersing and emulsifying to obtain the emulsified asphalt;
s4: preparing a silica sol-polystyrene butyl acrylate blending modified emulsion: mixing and stirring the polystyrene butyl acrylate emulsion, a pH regulator, silica sol, a dispersing agent and a silane coupling agent to obtain the silica sol-polystyrene butyl acrylate blending modified emulsion;
s5: preparation of the water-based asphalt waterproof coating: and mixing and stirring the emulsified asphalt, a dispersing agent, a pH regulator, heavy calcium carbonate, silica sol-polystyrene butyl acrylate blending modified emulsion, styrene-butadiene latex and other auxiliaries to obtain the water-based asphalt-based waterproof coating.
In the invention, the styrene-butadiene latex can improve the low-temperature performance, the elongation at break and the heat resistance of the waterproof coating, and the ground limestone can improve the tensile strength of the waterproof coating and reduce the cost.
According to the invention, preferably, in step S1:
heating and melting the asphalt to a flowing state at 150-170 ℃;
the stirring time is 20-60min, the stirring speed is 400-1200r/min, and the stirring temperature is 160-180 ℃.
In the present invention, as a preferable embodiment, the preparation of the modified asphalt of step S1 comprises: heating and melting the asphalt to a flowing state to obtain molten asphalt; mixing and stirring the molten asphalt, the anti-rutting master batches, the petroleum resin and the Fischer-Tropsch wax for 20-40min at the rotating speed of 400-800r/min to obtain a first mixture; and mixing and stirring the first mixture and the organic montmorillonite, keeping the rotating speed at 600-1200r/min and the temperature at 160-180 ℃ to obtain the modified asphalt.
According to the present invention, preferably, in step S2, the stirring time is 8-12min, and the stirring temperature is 55-65 ℃.
According to the present invention, preferably, in step S3, the temperature of the modified asphalt is 130 to 160 ℃, and the temperature of the soap solution is 55 to 65 ℃.
According to the invention, preferably, in step S4:
adding the pH regulator to regulate the pH of the silica sol-polystyrene butyl acrylate blending modified emulsion to 9-11;
the stirring time is 10-80min, and the stirring speed is 400-800r/min.
In the present invention, as a preferable scheme, the preparation of the silica sol-polystyrene butyl acrylate blending modified emulsion of the step S4 comprises: firstly, mixing and stirring the polystyrene butyl acrylate emulsion and a pH regulator, regulating the pH to 9-11, and stirring at the speed of 400-600r/min to obtain a second mixture; mixing and stirring the second mixture, the silica sol and the dispersing agent for 20-40min at a stirring speed of 600-800r/min to obtain a third mixture; and mixing and stirring the third mixture and a silane coupling agent for 15-30min to obtain the silica sol-polystyrene butyl acrylate blending modified emulsion.
According to the invention, preferably, in step S5:
adding the pH regulator to regulate the pH of the water-based asphalt-based waterproof coating to 9-11;
the stirring time is 10-200min, and the stirring speed is 300-1200r/min;
in the present invention, step S5 preferably includes:
firstly, mixing and stirring the emulsified asphalt and the dispersant for 15-30min at the stirring speed of 300-500r/min to obtain a fourth mixture; stirring the fourth mixture and a pH regulator for 5min, and regulating the pH to 9-11 to obtain a fifth mixture;
mixing and stirring the fifth mixture and the heavy calcium carbonate for 30-40min at a stirring speed of 400-800r/min to obtain a sixth mixture; mixing and stirring the sixth mixture, the silica sol-polystyrene butyl acrylate blending modified emulsion and the styrene-butadiene latex for 15-30min at the stirring speed of 600-800r/min to obtain a seventh mixture;
mixing and stirring the seventh mixture, the film-forming additive and the defoaming agent for 5-10min at a stirring speed of 600-800r/min to obtain an eighth mixture; and mixing and stirring the eighth mixture and the thickening agent for 20-40min at the stirring speed of 700-1100r/min to obtain the water-based asphalt-based waterproof coating.
According to the present invention, it is preferable that the ratio of the amount of the pH adjuster in step S4 to the amount of the pH adjuster in step S5 is 1: (1-1.5).
According to the present invention, it is preferable that the amount ratio of the dispersant in step S4 to the dispersant in step S5 is 1: (1-1.5).
In the present invention, the dispersant can sufficiently wet and uniformly disperse the powder phase in the waterproof coating material by the liquid phase, and minimize the separation, aggregation of the system and the settling rate of the solid particles, so as to maintain the maximum kinetic stability of the waterproof coating material.
The technical scheme of the invention has the following beneficial effects:
(1) The bonding strength of the water-based asphalt-based waterproof coating is improved by 200%, the shear strength at 50 ℃ is improved by 300%, the shear strength at 70 ℃ is improved by 400%, and the bonding strength exceeds 200% of the existing standard requirement, wherein the shear strength at 70 ℃ is more than 0.15MPa, and the material still has no shear transition disease at extremely high temperature of a road surface. Meanwhile, the water resistance of the water-based asphalt waterproof coating is also obviously improved, the increase of the salt treatment quality of the material is close to 0, and the reduction amplitude reaches more than 85%.
(2) The invention adopts a brand new compound mixed emulsion modified system of silica sol-polystyrene butyl acrylate blended modified emulsion to replace the prior neoprene latex system. The silica sol is a colloidal solution of silica colloidal particles dispersed in water, and after water is evaporated, a firm Si-O bond can be formed, and the Si-O bond has large energy, so that the heat resistance, the tensile strength and other properties of the coating can be improved. Meanwhile, the silica sol permeates into the cement base layer and can react with calcium hydroxide in the concrete base layer to generate calcium silicate, so that the bonding strength of the coating can be enhanced. After the silica sol and the polystyrene butyl acrylate emulsion are blended, the film-forming property and the low-temperature toughness of the coating can be further improved. The silane coupling agent is added in the preparation of the silica sol-polystyrene butyl acrylate blending modified emulsion, one end of the silane coupling agent can react with a hydrogen bond in a silica particle to form a chemical bond after being hydrolyzed, and the other section of the silane coupling agent interacts with a long molecular chain in the polystyrene butyl acrylate emulsion, so that inorganic materials such as silica sol are coupled with the polystyrene butyl acrylate emulsion, and the performances of the materials such as bonding strength, water resistance, tensile strength and the like are further improved.
(3) The invention adopts organic montmorillonite as modified filler to replace the existing heavy calcium or talcum powder and other fillers as main fillers. Montmorillonite is a layered hydrous aluminosilicate mineral with the shape of 2: 1, the structural unit of the montmorillonite is formed by 2 layers of Si-O tetrahedra with 1 layer of Al-O octahedra, the thickness of each layer is about 1nm, the length and the width of each layer are about 100nm, the layers are connected by weak van der Waals force or electrostatic action, the lattice arrangement is highly ordered, and the layers are not easy to slip. The polymer (the high polymer particles of the waterproof coating, the silica sol-polystyrene butyl acrylate blending modified emulsion and the high polymer particles therein) can be intercalated, so that the high temperature resistance and the ageing resistance of the waterproof coating are improved. The organic montmorillonite is lipophilic, can increase interlayer distance, makes polymer intercalation easier, and has more remarkable improvement on high temperature resistance and ageing resistance.
(4) The invention further improves the viscosity of the asphalt by adopting the anti-rutting master batch so as to improve the high-temperature shear resistance of the waterproof coating. The main components of the anti-rutting master batch used by the invention are natural asphalt and Low Density Polyethylene (LDPE). The natural asphalt is mixed with mineral substances in a certain proportion due to high asphaltene content, and the softening point of the natural asphalt is far higher than that of petroleum asphalt, so that the natural asphalt can be mixed with asphalt to improve the high temperature resistance of the waterproof coating. And Low Density Polyethylene (LDPE) is uniformly dispersed in the asphalt through the swelling of the light components of the asphalt, and can be used as high molecular long-chain unsaturated olefin to obviously improve the high temperature resistance of the waterproof coating.
(5) The Fischer-Tropsch wax is adopted to further improve the viscosity of the asphalt so as to improve the high-temperature shear resistance of the waterproof coating, the Fischer-Tropsch wax is mainly composed of straight chain and saturated carbon alkane with the relative molecular mass of 500-1000, the Fischer-Tropsch wax has good compatibility with the asphalt, and when the temperature is lower than the melting point, the Fischer-Tropsch wax forms a lattice structure in the asphalt, so that the Fischer-Tropsch wax can improve the high-temperature resistance of the waterproof coating due to the high crystallinity and high linearity of the Fischer-Tropsch wax.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
In the following examples;
the anti-rutting master batch is a medium petrochemical anti-rutting master batch;
the organic montmorillonite is a Fenghong DK2 nano organic montmorillonite;
the defoaming agent is a Dow AFE-1410 polydimethylsiloxane defoaming agent;
the thickening agent is ACRYSOLTMTT-935 hydrophobic modified alkali soluble emulsion type thickening agent;
the pH regulator is a Dow pH regulator AMP-95;
the dispersant is SN5040;
the silica sol is a Shandong Baite new material SS3010 silica sol.
Example 1
The embodiment provides a water-based asphalt-based waterproof coating, which comprises the following components in parts by weight:
25 parts of 70# A grade petroleum asphalt, 6 parts of anti-rutting master batch, 2 parts of C9 petroleum resin, 1 part of Fischer-Tropsch wax, 8 parts of organic montmorillonite, 0.5 part of sodium dodecyl sulfate, 22 parts of deionized water, 8 parts of polystyrene butyl acrylate emulsion, 8 parts of silica sol, 0.2 part of dispersing agent, 0.1 part of pH regulator, 0.2 part of gamma-glycidyl ether oxypropyl trimethoxy silane, 3 parts of 800-mesh heavy calcium carbonate, 15 parts of butadiene styrene latex, 0.2 part of ethylene glycol butyl ether, 0.2 part of defoaming agent and 0.6 part of thickening agent.
The preparation method of the water-based asphalt waterproof coating comprises the following steps:
s1: preparing modified asphalt: heating and melting 70# A grade petroleum asphalt at 160 ℃ to a flowing state to obtain molten asphalt; mixing and stirring the molten asphalt, the anti-rutting master batches, the C9 petroleum resin and the Fischer-Tropsch wax for 25min at a rotating speed of 600r/min to obtain a first mixture; mixing and stirring the first mixture and the organic montmorillonite soil at the rotating speed of 800r/min and the temperature of 170 ℃ to obtain the modified asphalt;
s2: preparing a soap solution: mixing and stirring sodium dodecyl sulfate and water for 10min at the stirring temperature of 60 ℃ to obtain the soap solution;
s3: preparing emulsified asphalt: mixing the modified asphalt (155 ℃) with the soap solution (60 ℃), and dispersing and emulsifying by an emulsifying machine to obtain the emulsified asphalt;
s4: preparation of silica sol-polystyrene butyl acrylate blending modified emulsion: mixing and stirring the polystyrene butyl acrylate emulsion and the pH regulator at normal temperature, regulating the pH to 10, and stirring at the speed of 500r/min to obtain a second mixture; mixing and stirring the second mixture, the silica sol and the dispersing agent for 30min at a stirring speed of 700r/min to obtain a third mixture; mixing and stirring the third mixture and gamma-glycidyl ether oxypropyl trimethoxy silane for 25min to obtain the silica sol-polystyrene butyl acrylate blending modified emulsion;
s5: preparing the water-based asphalt-based waterproof coating:
firstly, mixing and stirring the emulsified asphalt and the dispersing agent for 25min at the stirring speed of 400r/min to obtain a fourth mixture; stirring the fourth mixture and a pH regulator for 5min, and regulating the pH to 10 to obtain a fifth mixture;
mixing and stirring the fifth mixture and 800-mesh heavy calcium carbonate for 35min at the stirring speed of 700r/min to obtain a sixth mixture; mixing and stirring the sixth mixture, the silica sol-polystyrene butyl acrylate blending modified emulsion and the styrene-butadiene latex for 18min at the stirring speed of 700r/min to obtain a seventh mixture;
mixing and stirring the seventh mixture, ethylene glycol monobutyl ether and a defoaming agent for 6min at a stirring speed of 700r/min to obtain an eighth mixture; and mixing and stirring the eighth mixture and the thickening agent for 30min at the stirring speed of 1000r/min to obtain the water-based asphalt-based waterproof coating.
The dosage ratio of the pH regulator in the step S4 to the pH regulator in the step S5 is 1:1;
the dosage ratio of the dispersant in the step S4 to the dispersant in the step S5 is 1:1.
example 2
The embodiment provides a water-based asphalt-based waterproof coating, which comprises the following components in parts by weight:
30 parts of 70# A grade petroleum asphalt, 2 parts of anti-rutting master batch, 4 parts of C9 petroleum resin, 1 part of Fischer-Tropsch wax, 10 parts of organic montmorillonite, 0.5 part of sodium dodecyl sulfate, 17 parts of deionized water, 10 parts of polystyrene butyl acrylate emulsion, 6 parts of silica sol, 0.3 part of dispersing agent, 0.1 part of pH regulator, 0.2 part of gamma-glycidyl ether oxypropyl trimethoxy silane, 3 parts of 800-mesh heavy calcium carbonate, 14 parts of butadiene styrene latex, 0.2 part of dodecyl alcohol ester, 0.2 part of defoaming agent and 1.5 parts of thickening agent.
The preparation method of the water-based asphalt-based waterproof coating material of this example is the same as that of example 1.
Example 3
The embodiment provides a water-based asphalt-based waterproof coating, which comprises the following components in parts by weight:
22 parts of 70# A grade petroleum asphalt, 4 parts of anti-rutting master batch, 3 parts of C9 petroleum resin, 3 parts of Fischer-Tropsch wax, 8 parts of organic montmorillonite, 0.4 part of sodium dodecyl polyoxyethylene ether sulfate, 26 parts of deionized water, 5 parts of polystyrene butyl acrylate emulsion, 9 parts of silica sol, 0.2 part of dispersing agent, 0.1 part of pH regulator, 0.25 part of gamma-glycidyl ether oxypropyl trimethoxy silane, 2 parts of 800-mesh heavy calcium carbonate, 16 parts of styrene-butadiene latex, 0.3 part of dodecyl alcohol ester, 0.2 part of defoaming agent and 0.55 part of thickening agent.
The preparation method of the water-based asphalt-based waterproof coating material of this example is the same as that of example 1.
Comparative example 1
The comparative example provides a water-based asphalt-based waterproof coating, which meets the formula materials and parameter ranges of a market product PB2 road and bridge waterproof coating, and comprises the following components in parts by weight:
30 parts of 70# A grade petroleum asphalt, 0.4 part of sodium dodecyl sulfate, 19 parts of deionized water, 0.3 part of dispersant, 20 parts of 800-mesh heavy calcium carbonate, 0.1 part of pH regulator, 30 parts of neoprene latex and 0.2 part of thickener 250HBR.
Test example
This test example the aqueous asphalt-based waterproof paints of examples 1 to 3 and comparative example 1 were tested according to the method of JC/T975-2005 waterproof paint for roads and bridges, and the results are shown in Table 1.
TABLE 1
| Example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Heat resistance of DEG C | 210℃ | 200℃ | 200℃ | 160℃ |
| Flexibility at low temperature | -25℃ | -30℃ | -30℃ | -25℃ |
| Tensile strength MPa | 3.85 | 3.19 | 3.37 | 1.08 |
| Elongation at break% | 850 | 960 | 883 | 952 |
| Retention of tensile strength by salt treatment% | 97％ | 93％ | 95％ | 79％ |
| Increased quality of salt treatment | 0.3％ | 0.6％ | 0.6％ | 4.5％ |
| The bonding strength of the coating and the cement concrete is MPa | 1.56 | 1.52 | 1.56 | 0.56 |
| Shear strength MPa at 50 DEG C | 0.58 | 0.53 | 0.52 | 0.15 |
| 50 ℃ bond strength MPa | 0.18 | 0.16 | 0.16 | 0.05 |
| Shear strength MPa at 70 DEG C | 0.28 | 0.25 | 0.25 | 0.05 |
| Bonding strength MPa at 70 DEG C | 0.06 | 0.06 | 0.07 | 0.02 |
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The water-based asphalt-based waterproof coating is characterized by comprising the following components:
asphalt, anti-rutting master batches, petroleum resin, fischer-Tropsch wax, organic montmorillonite, anionic emulsifier, water, polystyrene butyl acrylate emulsion, silica sol, dispersing agent, pH regulator, silane coupling agent, heavy calcium carbonate, styrene-butadiene latex and other auxiliary agents.
2. The aqueous asphalt-based waterproof coating material according to claim 1, wherein the waterproof coating material comprises the following components in parts by weight:
20-30 parts of asphalt, 1-8 parts of anti-rutting master batch, 1-5 parts of petroleum resin, 0.5-5 parts of Fischer-Tropsch wax, 5-10 parts of organic montmorillonite, 0.5-2.5 parts of anionic emulsifier, 20-30 parts of water, 3-12 parts of polystyrene butyl acrylate emulsion, 5-12 parts of silica sol, 0.1-0.5 part of dispersant, 0.1-1 part of pH regulator, 0.1-0.5 part of silane coupling agent, 1-5 parts of heavy calcium carbonate, 15-30 parts of styrene-butadiene latex and 0.1-3 parts of other auxiliary agents.
3. The aqueous asphalt-based waterproof coating material according to claim 2, wherein the waterproof coating material comprises the following components in parts by weight:
22-30 parts of asphalt, 2-8 parts of anti-rutting master batch, 1-4 parts of petroleum resin, 1-5 parts of Fischer-Tropsch wax, 7-10 parts of organic montmorillonite, 0.5-2.5 parts of anionic emulsifier, 20-30 parts of water, 3-10 parts of polystyrene butyl acrylate emulsion, 5-12 parts of silica sol, 0.1-0.5 part of dispersant, 0.1-1 part of pH regulator, 0.1-0.5 part of silane coupling agent, 1-5 parts of heavy calcium carbonate, 15-30 parts of styrene-butadiene latex and 0.1-3 parts of other auxiliary agents.
4. The aqueous asphalt-based waterproofing coating according to any one of claims 1 to 3,
the asphalt is 70# A grade petroleum asphalt;
the petroleum resin is at least one of C9 petroleum resin, coumarone resin and terpene resin;
the anionic emulsifier is at least one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate and sodium dodecyl polyoxyethylene ether sulfate;
the content of silicon dioxide in the silica sol is 20-45%, the particle size of the silicon dioxide is 5-10nm, and the pH value of the silica sol is 8-11;
the silane coupling agent is gamma-glycidoxypropyltrimethoxysilane and/or N-beta- (aminoethyl) -gamma-aminopropyltrimethoxysilane;
the particle size of the heavy calcium carbonate is 700-900 meshes;
the other auxiliary agents comprise the following components in parts by weight: 0.1-0.4 part of film-forming additive, 0.1-0.5 part of defoaming agent and 0.5-2 parts of thickening agent.
5. The aqueous asphalt-based waterproofing coating according to claim 4,
the film-forming auxiliary agent is at least one of dodecyl alcohol ester, ethylene glycol butyl ether and hexanediol butyl ether acetate;
the defoaming agent is at least one of polydimethylsiloxane defoaming agent, polyether modified silicon defoaming agent and mineral oil defoaming agent;
the thickening agent is at least one of a hydrophobic modified alkali-soluble emulsion thickening agent, hydroxyethyl cellulose and a polyacrylate thickening agent.
6. The method for preparing the aqueous asphalt-based waterproof coating material according to any one of claims 1 to 5, comprising the steps of:
s1: preparing modified asphalt: heating and melting the asphalt to a flowing state to obtain molten asphalt; mixing and stirring the molten asphalt, the anti-rutting master batches, the petroleum resin, the Fischer-Tropsch wax and the organic montmorillonite soil to obtain the modified asphalt;
s2: preparing a soap solution: mixing and stirring the anionic emulsifier and water to obtain the soap solution;
s3: preparing emulsified asphalt: mixing the modified asphalt with the soap solution, and dispersing and emulsifying to obtain the emulsified asphalt;
s4: preparing a silica sol-polystyrene butyl acrylate blending modified emulsion: mixing and stirring the polystyrene butyl acrylate emulsion, a pH regulator, silica sol, a dispersing agent and a silane coupling agent to obtain the silica sol-polystyrene butyl acrylate blending modified emulsion;
s5: preparing the water-based asphalt-based waterproof coating: and mixing and stirring the emulsified asphalt, a dispersing agent, a pH regulator, heavy calcium carbonate, silica sol-polystyrene butyl acrylate blending modified emulsion, styrene-butadiene latex and other auxiliaries to obtain the water-based asphalt-based waterproof coating.
7. The method for preparing an aqueous asphalt-based waterproofing coating according to claim 6, wherein in step S1:
heating and melting the asphalt to a flowing state at 150-170 ℃;
the stirring time is 20-60min, the stirring speed is 400-1200r/min, and the stirring temperature is 160-180 ℃.
8. The method for preparing an aqueous asphalt-based waterproofing coating according to claim 6, wherein in step S2, the stirring time is 8 to 12min, and the stirring temperature is 55 to 65 ℃.
9. The method for preparing an aqueous asphalt-based waterproof coating material according to claim 6, wherein in step S3, the temperature of the modified asphalt is 130 to 160 ℃ and the temperature of the soap solution is 55 to 65 ℃.
10. The method for preparing an aqueous asphalt-based waterproofing coating according to claim 6,
in step S4:
adding the pH regulator to regulate the pH of the silica sol-polystyrene butyl acrylate blending modified emulsion to 9-11;
the stirring time is 10-80min, and the stirring speed is 400-800r/min;
in step S5:
adding the pH regulator to regulate the pH of the water-based asphalt-based waterproof coating to 9-11;
the stirring time is 10-200min, and the stirring speed is 300-1200r/min;
the dosage ratio of the pH regulator in the step S4 to the pH regulator in the step S5 is 1: (1-1.5);
the dosage ratio of the dispersant in the step S4 to the dispersant in the step S5 is 1: (1-1.5).
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