CN113667404B - High-viscosity water-based asphalt waterproof coating and preparation method thereof - Google Patents
High-viscosity water-based asphalt waterproof coating and preparation method thereof Download PDFInfo
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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
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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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/43—Thickening agents
- C09D7/44—Combinations of two or more thickening agents
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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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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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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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K2003/2241—Titanium dioxide
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Abstract
The invention relates to a high-viscosity water-based asphalt waterproof coating and a preparation method thereof, wherein the high-viscosity water-based asphalt waterproof coating is prepared from the following raw materials in parts by weight: 50-70 parts of anionic emulsified asphalt, 10-30 parts of acrylic emulsion, 5-25 parts of neoprene latex, 1-2 parts of defoaming agent, 1-3 parts of thickening agent, 0.5-1 part of bactericide, 3-5 parts of wetting agent, 1-3 parts of dispersing agent, 10-30 parts of filler, 1-2 parts of cosolvent and 5-15 parts of water; the thickening agent is prepared from water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide according to a mass ratio of 1: (0.45-0.68): (0.6-0.9). The coating has high bonding strength, high tensile strength, high elongation and excellent low-temperature flexibility, and solves the problem of construction foaming.
Description
Technical Field
The invention belongs to the technical field of waterproof coatings, and particularly relates to a high-viscosity water-based asphalt waterproof coating and a preparation method thereof.
Background
With the development of roads, bridges and construction engineering, asphalt is widely used in road and bridge engineering and waterproof engineering due to its excellent waterproof property and cohesiveness. The water-based asphalt waterproof coating is an oil-in-water emulsion formed by melting asphalt and dispersing the asphalt in water under the action of an emulsifier and the like and a high-shear mechanical force. The emulsified asphalt obtained by only emulsifying the asphalt cannot be used as a waterproof material alone due to the defects of poor mechanical property, high temperature sensitivity and the like, and can only be used as a general base layer treating agent.
In recent years, the performance of the water-based asphalt coating is improved by adding rubber materials such as SBS and the like into the hot-melt asphalt for modification, and the high-low temperature performance and the fracture elongation of the material are obviously improved. However, the rubber modified water-based asphalt coating still has an unsatisfactory effect in construction application, and mainly has the problems of poor adhesion between a coating film and a base surface, foot adhesion, low seepage pressure resistance, easiness in foaming due to direct solar radiation and the like. There are also some cases where the addition of the polymer is not limited by the amount of the polymer added by cold-splicing the emulsified asphalt with an acrylic emulsion, SBR or neoprene emulsion. However, the research result shows that the acrylic emulsion has obvious improvement on the bonding strength and the anti-foaming capability of the water-based asphalt coating, but has poor compatibility with asphalt, and has undesirable effects on the improvement of the tensile strength, the elongation at break and the low-temperature flexibility of the water-based asphalt coating. Therefore, how to develop a water-based asphalt waterproof coating material with high bonding strength, high tensile strength, elongation at break and low-temperature flexibility is a problem to be solved at present.
Disclosure of Invention
The invention aims to provide a high-viscosity water-based asphalt waterproof coating and a preparation method thereof.
The invention is realized by the following technical scheme:
the high-viscosity water-based asphalt waterproof coating is prepared from the following raw materials in parts by weight: 50-70 parts of anionic emulsified asphalt, 10-30 parts of acrylic emulsion, 5-25 parts of neoprene latex, 1-2 parts of defoaming agent, 1-3 parts of thickening agent, 0.5-1 part of bactericide, 3-5 parts of wetting agent, 1-3 parts of dispersing agent, 10-30 parts of filler, 1-2 parts of cosolvent and 5-15 parts of water;
the thickening agent is prepared from water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide according to a mass ratio of 1: (0.45-0.68): (0.6-0.9).
Further, the thickening agent is prepared by the following method: mixing the water-based associative polyurethane and the silicone gel uniformly, then adding polyhydroxy polyacrylamide at 40-50 ℃, and stirring for 30-60min to obtain the water-based associative polyurethane gel.
Further, the preparation method of the polyhydroxy polyacrylamide comprises the following steps: preparing polyacrylamide into 4-6% polyacrylamide aqueous solution, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine until the pH value is 10-11, stirring at 50-60 ℃ for reaction for 4-6h, extracting a product by acetone, and drying in vacuum at 50 ℃ to constant weight to obtain polyhydroxy polyacrylamide; the mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1: (0.5-1): (0.01-0.02).
Further, the defoaming agent is a modified organic silicon acrylate defoaming agent, and the modified organic silicon acrylate defoaming agent is prepared by the following method: adding polyether polyol and organic silicon acrylate into a reaction kettle, uniformly mixing, then adding tetraethyl titanate and a polymerization inhibitor, and reacting for 5-8h at 50-80 ℃ to obtain the modified organic silicon acrylate defoaming agent; the mass ratio of the polyether polyol, the tetraethyl titanate, the polymerization inhibitor to the organic silicon acrylate is (0.3-0.5): 0.01-0.02): (0.005-0.008):1.
Further, the filler is one or a mixture of more than two of heavy calcium carbonate, talcum powder, kaolin, barium sulfate or carbon black mixed in any proportion.
Furthermore, the cosolvent is one or a mixture of more than two of dipropylene glycol dimethyl ether, diethylene glycol monobutyl ether or tween mixed in any proportion.
Further, the wetting agent is one or two of alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether or polyoxyethylene polyoxypropylene ether block copolymer.
Further, the dispersing agent is a mixture formed by mixing one or more than two of ethylene-acrylic acid copolymer, oxidized polyethylene wax, fatty alcohol-polyoxyethylene ether or ethylene-vinyl acetate copolymer in any proportion.
A preparation method of a high-viscosity water-based asphalt waterproof coating specifically comprises the following steps:
adding water and acrylic emulsion into a container, then adding a defoaming agent, a wetting agent and a dispersing agent, and mixing at the speed of 500-700rpm until the mixture is uniform;
then adding a filler, increasing the stirring speed to 1000-1200rpm, and stirring for 20-30min;
reducing the stirring speed to 650-800rpm, then adding the anionic emulsified asphalt and the neoprene latex, and stirring for 5-10min;
and finally, adding a thickening agent, a bactericide and a cosolvent, and continuously stirring for 5-10min to obtain the high-viscosity water-based asphalt waterproof coating.
The invention achieves the following beneficial effects:
the coating has high bonding strength, high tensile strength, high elongation and excellent low-temperature flexibility, and solves the problem of construction foaming.
1. The thickening agent is prepared by compounding water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide, the compound can form a stable and uniform spatial network structure, and can effectively prevent components such as a filler and the like from precipitating for a long time.
2. By adding the cosolvent, the compatibility among the components such as the acrylic emulsion, the neoprene latex, the anionic emulsified asphalt and the like is improved, and further, the tensile strength, the elongation at break and the low-temperature flexibility of the water-based asphalt waterproof coating are improved.
3. The defoaming agent is a polyether modified organic silicon acrylate defoaming agent, the organic silicon acrylate has excellent defoaming performance, and when the defoaming agent is added into a coating, the smoothness, scratch resistance and leveling property of the surface of the coating can be improved. According to the invention, the organic silicon acrylate is modified by polyether, so that the organic silicon acrylate and the polyether react under the action of a catalyst and a polymerization inhibitor, and the polyether is grafted on the organic silicon acrylate structure, so that the defoaming agent disclosed by the invention combines the comprehensive defoaming capabilities of the polyether defoaming agent and the organic silicon acrylate defoaming agent, namely, the defoaming agent has excellent foam inhibition performance and defoaming performance, the anti-foaming capability of the invention is greatly improved, and the problem of easiness in foaming during construction is solved; the defoamer also improves the smoothness, scratch resistance and leveling of the coating.
4. According to the invention, by adding the dispersing agents such as the ethylene-acrylic acid copolymer, the oxidized polyethylene wax, the fatty alcohol-polyoxyethylene ether and the like, the surface tension of water can be instantly reduced, the coating is formed on the surface of the solid filler, and the hydrophobic end of the dispersing agent forms stable steric hindrance due to longer carbon chain molecules, so that the dispersing effect is improved, and all the components are uniformly dispersed and are not easy to agglomerate. The wetting agent can reduce the dynamic surface tension, and the wetting agent and the dispersant have synergistic effect, so that the components have higher interface binding force under the condition of uniformly dispersing the components, thereby improving the bonding strength between the coating and a substrate after the coating is formed into a film and also increasing the mechanical strength of the coating formed into the film.
5. According to the invention, a proper amount of acrylic emulsion and neoprene latex are added to modify anionic emulsified asphalt at normal temperature, and a thickening agent, a bactericide, a defoaming agent, a filler and a cosolvent are added, so that the components interact with each other, and the water-based asphalt waterproof coating has excellent bonding strength, good bonding property when used for a base layer, excellent stripping resistance, slip resistance and good sagging resistance.
6. The water-based asphalt waterproof coating has the advantages of easily obtained raw materials, simple preparation method, no need of heating and special equipment, lower production cost and suitability for construction sites.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The waterborne association type polyurethane is model DH-7216S produced by Suzhou Qingtian new material Co.
The organic silicon acrylate is prepared by adopting the embodiment 1 in the Chinese patent CN 201310062317.3.
The highly viscous and water-repellent asphalt coating material of the present invention will be described with reference to specific examples.
Example 1
The preparation method of the high-viscosity water-based asphalt waterproof coating comprises the following steps: adding 5 parts of water and 10 parts of acrylic emulsion into a container, uniformly stirring, then adding 1 part of defoaming agent, 5 parts of wetting agent and 1 part of dispersing agent, uniformly mixing at the speed of 500rpm, then adding 10 parts of filler, and stirring for 20min at the speed of 1000 rpm; at the speed of 700rpm, 50 parts of anionic emulsified asphalt and 5 parts of neoprene latex are sequentially added, stirred for 10min, then added with 1 part of thickening agent, 0.5 part of bactericide and 1 part of cosolvent, and stirred for 5min continuously. The thickening agent is prepared by compounding water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide.
The thickening agent is prepared by uniformly mixing the water-based associated polyurethane and the silicone gel, then adding the polyhydroxy polyacrylamide at 40 ℃, and stirring for 60 min. The mass ratio of the waterborne association type polyurethane to the silicone gel to the polyhydroxy polyacrylamide is 1:0.45:0.6.
the preparation method of the polyhydroxy polyacrylamide comprises the following steps: preparing 4% aqueous solution of polyacrylamide, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine to adjust the p H value to 10-11, stirring and reacting at 50 ℃ for 6h, extracting the product with acetone, and drying in vacuum at 50 ℃ to constant weight to obtain the polyacrylamide gel. The mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1:0.5:0.01.
the defoaming agent is a modified organic silicon acrylate defoaming agent, and the preparation method comprises the following steps: adding 30g of polyether polyol and 100g of organic silicon acrylate into a reaction kettle, uniformly mixing, then adding 1g of tetraethyl titanate and 0.5g of p-hydroxyanisole, and reacting at 60 ℃ for 7 hours to obtain the modified organic silicon acrylate defoaming agent.
The bactericide is produced by Zhongwan New materials Co., ltd, and has the model number WS-0002.
The filler is coarse whiting and calcium hydrogen, and the mass ratio is 2:1.
The cosolvent is dipropylene glycol dimethyl ether.
The wetting agent is alkylphenol polyoxyethylene.
The dispersant is an ethylene-acrylic acid copolymer.
Example 2
The preparation method of the high-viscosity water-based asphalt waterproof coating comprises the following steps: adding 15 parts of water and 30 parts of acrylic emulsion into a container, uniformly stirring, then adding 2 parts of defoaming agent, 3 parts of wetting agent and 3 parts of dispersing agent, uniformly mixing at the speed of 700rpm, then adding 30 parts of filler, and stirring for 30min at the speed of 1100 rpm; and sequentially adding 70 parts of anionic emulsified asphalt and 25 parts of neoprene latex at the speed of 650rpm, stirring for 5min, adding 3 parts of thickening agent, 1 part of bactericide and 2 parts of cosolvent, and continuously stirring for 10 min. The thickening agent is prepared by compounding water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide.
The thickening agent is prepared by uniformly mixing the water-based associated polyurethane and the silicone gel, then adding the polyhydroxy polyacrylamide at 50 ℃, and stirring for 30 min. The mass ratio of the waterborne association type polyurethane to the silicone gel to the polyhydroxy polyacrylamide is 1:0.68:0.9.
the preparation method of the polyhydroxy polyacrylamide comprises the following steps: preparing 6% aqueous solution of polyacrylamide, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine to adjust the p H value to 10-11, stirring and reacting at 60 ℃ for 4h, extracting the product with acetone, and drying in vacuum at 50 ℃ to constant weight to obtain the polyacrylamide gel. The mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1:1:0.02.
the defoaming agent is a modified organic silicon acrylate defoaming agent, and the preparation method comprises the following steps: adding 50g of polyether polyol and 100g of organic silicon acrylate into a reaction kettle, uniformly mixing, then adding 2g of tetraethyl titanate and 0.8g of 2, 6-dinitro-p-cresol, and reacting for 8 hours at 50 ℃ to obtain the modified organic silicon acrylate defoaming agent.
The bactericide is model WS-0002 produced by Zhongwan New materials Co.
The filler is barium sulfate and carbon black, and the mass ratio of the barium sulfate to the carbon black is 1:1.
The cosolvent is diethylene glycol monobutyl ether.
The wetting agent is fatty alcohol polyoxyethylene ether.
The dispersant is oxidized polyethylene wax.
Example 3
The preparation method of the high-viscosity water-based asphalt waterproof coating comprises the following steps: adding 10 parts of water and 15 parts of acrylic emulsion into a container, uniformly stirring, then adding 2 parts of defoaming agent, 4 parts of wetting agent and 2 parts of dispersing agent, uniformly mixing at the speed of 600rpm, then adding 20 parts of filler, and stirring for 40min at the speed of 1200 rpm; at the speed of 800rpm, 60 parts of anionic emulsified asphalt and 20 parts of neoprene latex are sequentially added, stirred for 10min, then added with 2 parts of thickening agent, 1 part of bactericide and 2 parts of cosolvent, and stirred for 5min continuously. The thickening agent is prepared by compounding water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide.
The thickening agent is prepared by uniformly mixing the water-based associated polyurethane and the silicone gel, then adding the polyhydroxy polyacrylamide at 50 ℃, and stirring for 45 min. The mass ratio of the water-based associated polyurethane to the silicone gel to the polyhydroxy polyacrylamide is 1:0.5:0.8.
the preparation method of the polyhydroxy polyacrylamide comprises the following steps: preparing 5% aqueous solution of polyacrylamide, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine to adjust the p H value to 10-11, stirring at 50 ℃ for reaction for 5h, extracting the product with acetone, and drying in vacuum at 50 ℃ until the weight is constant. The mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1:0.8:0.02.
the defoaming agent is a modified organic silicon acrylate defoaming agent, and the preparation method comprises the following steps: adding 40g of polyether polyol and 100g of organic silicon acrylate into a reaction kettle, uniformly mixing, then adding 1.5g of tetraethyl titanate and 0.6g of p-tert-butyl catechol, and reacting for 5 hours at 80 ℃ to obtain the modified organic silicon acrylate defoaming agent.
The bactericide is produced by Zhongwan New materials Co., ltd, and has the model number WS-0002.
The filler is heavy calcium, calcium hydrogen and titanium dioxide, and the mass ratio is 2.
The cosolvent is tween.
The wetting agent is polyoxyethylene polyoxypropylene ether block copolymer.
The dispersant is fatty alcohol-polyoxyethylene ether.
Example 4
The preparation method of the high-viscosity water-based asphalt waterproof coating comprises the following steps: adding 15 parts of water and 20 parts of acrylic emulsion into a container, uniformly stirring, then adding 1.5 parts of defoaming agent, 4 parts of wetting agent and 3 parts of dispersing agent, uniformly mixing at the speed of 600rpm, then adding 25 parts of filler, and stirring for 30min at the speed of 1100 rpm; and sequentially adding 55 parts of anionic emulsified asphalt and 18 parts of neoprene latex at the speed of 700rpm, stirring for 5min, adding 3 parts of thickening agent, 1 part of bactericide and 2 parts of cosolvent, and continuously stirring for 10 min. The thickening agent is prepared by compounding water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide.
The thickening agent is prepared by uniformly mixing the water-based associated polyurethane and the silicone gel, then adding the polyhydroxy polyacrylamide at 50 ℃, and stirring for 30 min. The mass ratio of the water-based associated polyurethane to the silicone gel to the polyhydroxy polyacrylamide is 1:0.62:0.75.
the preparation method of the polyhydroxy polyacrylamide comprises the following steps: preparing 4% aqueous solution of polyacrylamide, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine to adjust the p H value to 10-11, stirring and reacting at 50 ℃ for 5 hours, extracting the product with acetone, and drying in vacuum at 50 ℃ to constant weight to obtain the polyacrylamide gel. The mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1:1:0.02.
the defoaming agent is a modified organic silicon acrylate defoaming agent, and the preparation method comprises the following steps: 42g of polyether polyol and 100g of organic silicon acrylate are added into a reaction kettle and uniformly mixed, then 1g of tetraethyl titanate and 0.7g of p-tert-butyl catechol are added, and the reaction is carried out for 6 hours at 70 ℃ to prepare the modified organic silicon acrylate defoaming agent.
The bactericide is produced by Zhongwan New materials Co., ltd, and has the model number WS-0002.
The filler is heavy calcium, calcium hydrogen and carbon black, and the mass ratio is 1.
The cosolvent is tween and diethylene glycol monobutyl ether, and the mass ratio is 2:1.
The wetting agent is fatty alcohol polyoxyethylene ether.
The dispersant is ethylene-vinyl acetate copolymer.
Comparative example 1
The preparation method of the water-based asphalt waterproof coating comprises the following steps: adding 5 parts of water and 10 parts of acrylic emulsion into a container, uniformly stirring, then adding 1 part of defoaming agent, 5 parts of wetting agent and 1 part of dispersing agent, uniformly mixing at the speed of 500rpm, then adding 10 parts of filler, and stirring for 20min at the speed of 1000 rpm; at the speed of 700rpm, 50 parts of anionic emulsified asphalt and 5 parts of neoprene latex are sequentially added, stirred for 10min, added with 1 part of thickening agent, 0.5 part of bactericide and 1 part of cosolvent, and stirred for 5min continuously.
The thickening agent is polyacrylic acid saline alkali swelling, dow chemical, and the type is ASE 60.
The defoaming agent is a modified organic silicon acrylate defoaming agent, and the preparation method comprises the following steps: adding 30g of polyether polyol and 100g of organic silicon acrylate into a reaction kettle, uniformly mixing, then adding 1g of tetraethyl titanate and 0.5g of p-hydroxyanisole, and reacting at 60 ℃ for 7 hours to obtain the modified organic silicon acrylate defoaming agent.
The bactericide is model WS-0002 produced by Zhongwan New materials Co.
The filler is heavy calcium carbonate and calcium hydrogen carbonate, and the mass ratio of the heavy calcium carbonate to the calcium hydrogen carbonate is 2:1.
The cosolvent is dipropylene glycol dimethyl ether.
The wetting agent is alkylphenol polyoxyethylene.
The dispersant is an ethylene-acrylic acid copolymer.
Comparative example 2
The preparation method of the water-based asphalt waterproof coating comprises the following steps: adding 5 parts of water and 10 parts of acrylic emulsion into a container, uniformly stirring, then adding 1 part of defoaming agent, 5 parts of wetting agent and 1 part of dispersing agent, uniformly mixing at the speed of 500rpm, then adding 10 parts of filler, and stirring for 20min at the speed of 1000 rpm; at the speed of 700rpm, 50 parts of anionic emulsified asphalt and 5 parts of neoprene latex are sequentially added, stirred for 10min, then added with 1 part of thickening agent, 0.5 part of bactericide and 1 part of cosolvent, and stirred for 5min continuously. The thickening agent is prepared by compounding water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide.
The thickening agent is prepared by uniformly mixing the water-based associated polyurethane and the silicone gel, then adding the polyhydroxy polyacrylamide at 40 ℃, and stirring for 60 min. The mass ratio of the waterborne association type polyurethane to the silicone gel to the polyhydroxy polyacrylamide is 1:0.45:0.6.
the preparation method of the polyhydroxy polyacrylamide comprises the following steps: preparing 4% aqueous solution of polyacrylamide, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine to adjust the p H value to 10-11, stirring and reacting at 50 ℃ for 6h, extracting the product with acetone, and drying in vacuum at 50 ℃ to constant weight to obtain the polyacrylamide gel. The mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1:0.5:0.01.
the defoaming agent is a model K4000 produced by the Jinan Bai evolutionary engineering and technology Limited company.
The bactericide is model WS-0002 produced by Zhongwan New materials Co.
The filler is heavy calcium carbonate and calcium hydrogen carbonate, and the mass ratio of the heavy calcium carbonate to the calcium hydrogen carbonate is 2:1.
The cosolvent is dipropylene glycol dimethyl ether.
The wetting agent is alkylphenol polyoxyethylene.
The dispersant is an ethylene-acrylic acid copolymer.
After the coating materials of examples 1 to 4 and comparative examples 1 to 2 were hermetically left for 24 hours, the coating materials were applied to a mold to form a coating film having a thickness of about 1.5mm, and after curing under standard test conditions of 7, the tensile strength, elongation at break, tear strength, heat resistance and weather resistance of the coating film were measured, and the results are shown in the following table.
The physical and mechanical properties of the test method refer to JC/T408-2005 water emulsion type asphalt waterproof coating; wherein the tensile strength test method is carried out according to JG/T172-2014 elastic building coating; peel Strength test method the test was performed with reference to GB/T328.20-2007, and the test data are shown in Table 1 below.
TABLE 1 test data of physical and mechanical properties of water-based asphalt waterproofing paint
As can be seen from the test results of the above table, the present invention has excellent tensile strength, elongation at break and adhesive strength, and also has excellent low temperature flexibility. The use of commercially available defoamers and thickeners all reduce the cohesive strength, elongation at break, and tensile strength, thereby reducing the overall performance.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. A high-viscosity asphalt waterproof coating is characterized in that: the composite material consists of the following raw materials in parts by mass: 50-70 parts of anionic emulsified asphalt, 10-30 parts of acrylic emulsion, 5-25 parts of neoprene latex, 1-2 parts of defoaming agent, 1-3 parts of thickening agent, 0.5-1 part of bactericide, 3-5 parts of wetting agent, 1-3 parts of dispersing agent, 10-30 parts of filler, 1-2 parts of cosolvent and 5-15 parts of water;
the thickening agent is prepared from water-based associated polyurethane, silicone gel and polyhydroxy polyacrylamide according to a mass ratio of 1: (0.45-0.68): (0.6-0.9);
the thickening agent is prepared by the following method: uniformly mixing the waterborne association type polyurethane and the silicon gel, then adding polyhydroxy polyacrylamide at 40-50 ℃, and stirring for 30-60min to obtain the polyurethane-silicone gel;
the polyhydroxy polyacrylamide is prepared by the following method: preparing polyacrylamide into 4-6% polyacrylamide aqueous solution, adding formaldehyde and copper hydroxyphosphate, stirring uniformly, adding diethanolamine until the pH value is 10-11, stirring and reacting at 50-60 ℃ for 4-6h, extracting with acetone, and drying in vacuum to constant weight to obtain polyhydroxy polyacrylamide; the mass ratio of the polyacrylamide to the formaldehyde to the copper hydroxyphosphate is 1: (0.5-1): (0.01-0.02);
the defoaming agent is a modified organic silicon acrylate defoaming agent, and the modified organic silicon acrylate defoaming agent is prepared by the following method: adding polyether polyol and organic silicon acrylate into a reaction kettle, uniformly mixing, then adding tetraethyl titanate and a polymerization inhibitor, and reacting at 50-80 ℃ for 5-8h to obtain the modified organic silicon acrylate defoaming agent; the mass ratio of the polyether polyol, the tetraethyl titanate, the polymerization inhibitor and the organic silicon acrylate is (0.3-0.5): (0.01-0.02): (0.005-0.008):1.
2. The high-viscosity asphalt waterproof coating material as claimed in claim 1, wherein: the filler is one or a mixture of more than two of coarse whiting, talcum powder, kaolin, barium sulfate and carbon black which are mixed in any proportion.
3. The high-viscosity asphalt waterproof coating material as claimed in claim 1, wherein: the cosolvent is one or a mixture of more than two of dipropylene glycol dimethyl ether, diethylene glycol monobutyl ether and tween which are mixed in any proportion.
4. The high-viscosity asphalt waterproof coating material as claimed in claim 1, wherein: the wetting agent is a mixture formed by mixing one or more than two of alkylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether and polyoxyethylene polyoxypropylene ether block copolymer in any proportion.
5. The high viscosity asphalt waterproof paint according to claim 1, characterized in that: the dispersing agent is a mixture formed by mixing one or more than two of ethylene-acrylic acid copolymer, oxidized polyethylene wax, fatty alcohol-polyoxyethylene ether and ethylene-vinyl acetate copolymer in any proportion.
6. A preparation method for preparing the high-viscosity water-based asphalt waterproofing paint according to any one of claims 1 to 5, comprising the following steps:
adding water and acrylic emulsion into a container, then adding a defoaming agent, a wetting agent and a dispersing agent, and mixing at the speed of 500-700rpm until the mixture is uniform;
then adding a filler, increasing the stirring speed to 1000-1200rpm, and stirring for 20-30min;
reducing the stirring speed to 650-800rpm, then adding the anionic emulsified asphalt and the neoprene latex, and stirring for 5-10min;
and finally, adding a thickening agent, a bactericide and a cosolvent, and continuously stirring for 5-10min to obtain the high-viscosity water-based asphalt waterproof coating.
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| CN114539790A (en) * | 2021-12-31 | 2022-05-27 | 苏州市月星建筑防水材料有限公司 | Manufacturing process of high-viscosity anti-slip water-based rubber asphalt waterproof material |
| CN114196325B (en) * | 2022-02-15 | 2022-04-22 | 科顺防水科技股份有限公司 | Vertical-face anti-skid waterproof coating composition and application thereof, coating and preparation method and application thereof |
| CN114773867A (en) * | 2022-03-05 | 2022-07-22 | 苏州市月星建筑防水材料有限公司 | Manufacturing process and construction process of self-adhesive polymer modified asphalt waterproof coiled material |
| CN115305007A (en) * | 2022-08-06 | 2022-11-08 | 河北昊泽化工有限公司 | Acid-alkali-resistant high-tensile-strength asphalt waterproof coating and preparation method thereof |
| CN115286999A (en) * | 2022-08-23 | 2022-11-04 | 世纪洪雨（德州）科技有限公司 | GPG (general purpose glass cement) plaster rubber asphalt sealing waterproof coating and production process thereof |
| CN116589925A (en) * | 2022-11-10 | 2023-08-15 | 贵州梵亚高新科技有限公司 | High-sealing waterproof coating and preparation method thereof |
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