CN112409831A - Composite cement-based waterproof coating and preparation method thereof - Google Patents
Composite cement-based waterproof coating and preparation method thereof Download PDFInfo
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- CN112409831A CN112409831A CN202011097114.4A CN202011097114A CN112409831A CN 112409831 A CN112409831 A CN 112409831A CN 202011097114 A CN202011097114 A CN 202011097114A CN 112409831 A CN112409831 A CN 112409831A
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/06—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement
- C09D1/08—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances cement with organic additives
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Abstract
The invention provides a composite cement-based waterproof coating which comprises the following components in percentage by mass: 50-56% of compound emulsion, 32-36% of cement, 10-12% of quartz sand, 0.2-1.2% of coupling agent, 0.4-1.2% of defoaming agent, 0.05-0.15% of dispersing agent and 1-4% of film-forming assistant; wherein the compound emulsion is a mixture of organic silicon emulsion and polymer emulsion. In addition, the invention also provides a preparation method of the composite cement-based waterproof coating. According to the invention, the organic silicon emulsion for preparing the permeable coating and the polymer emulsion for preparing the surface film forming coating are compounded, and the coating is prepared by compounding the emulsion, so that the coating is more compact and has better waterproof effect, the corrosion resistance and durability of the waterproof coating can be obviously improved, the comprehensive performance of the coating is obviously improved, and the advantages of the surface permeable coating and the surface film forming coating are realized.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to a composite cement-based waterproof coating and a preparation method thereof.
Background
For a concrete structure in a marine environment, due to the erosion action of chloride ions, microorganisms and the like in seawater, the steel bars of the concrete structure are often corroded, the surface of the concrete cracks, and the structure is damaged too early. If the damaged part of the structure is not treated and repaired in time, the building loses the use function with the time extension, and huge economic loss is caused. Therefore, in order to prolong the service life of the ocean engineering and reduce the economic cost, necessary anticorrosion measures need to be taken for the ocean engineering.
The anticorrosion measures of ocean engineering include improving the self anticorrosion performance of building concrete and painting external waterproof paint, and the waterproof paint can be divided into two categories according to the waterproof mechanism of waterproof paint products, wherein one category is that the penetration of water or the penetration of water molecules is blocked by forming a complete coating film, so that the penetration of corrosive ions such as chloride ions is reduced, for example, the polymer cement waterproof paint takes a polymer as a main frame, and the polymer is coated with unhydrated cement, cement hydration products and other continuous coating films filled with pigments, so that the environmental pollution caused by solvent volatilization of the conventional solvent-based paint is avoided, and the paint is breathable, waterproof, nontoxic, harmless and green and environment-friendly. The other type is that the water penetration and the penetration of corrosive ions are prevented through the hydrophobic effect of the coating, such as a modified organosilicon waterproofing agent, active substances in the coating take water as a carrier, enter the interior of a base material to generate a penetration crystallization reaction, generate crystals insoluble in water, fill the pores of the base material, enable the base material to be compact, simultaneously realize the effective adhesion with the base material, and reduce the permeability of the corrosive ions such as chloride ions.
The two different types of coatings have advantages and disadvantages respectively, and at present, a composite coating combining the advantages of the two different types of coatings does not exist.
Disclosure of Invention
The invention aims to solve the problem of insufficient performance of the existing waterproof coating in the application process, provides a composite cement-based waterproof coating, combines the advantages of two different types of coating and permeable coating, and obtains the waterproof coating with better waterproof effect, durability and comprehensive performance.
In order to achieve the purpose, the invention adopts the following technical scheme: the composite cement-based waterproof coating comprises the following components in percentage by mass: 50-56% of compound emulsion, 32-36% of cement, 10-12% of quartz sand, 0.2-1.2% of coupling agent, 0.4-1.2% of defoaming agent, 0.05-0.15% of dispersing agent and 1-4% of film-forming assistant; wherein the compound emulsion is a mixture of organic silicon emulsion and polymer emulsion.
Furthermore, the mass ratio of the powder component to the liquid component in the components of the composite cement-based waterproof coating is 0.75-0.9, and the aggregate-cement ratio is 0.8: 1-1.1: 1.
Further, the polymer emulsion is any one or a mixture of more of neoprene latex, EVA emulsion, styrene-acrylic emulsion, styrene-butadiene emulsion and epoxy resin emulsion.
Further, the solid content of the polymer emulsion is 45-65%.
Further, the coupling agent is KH-550.
Further, the dispersant is a polycarboxylate dispersant 5040.
Further, the film-forming assistant is propylene glycol butyl ether.
In addition, the invention also provides a preparation method of the composite cement-based waterproof coating, which comprises the following steps:
1) weighing quartz sand and cement, and uniformly stirring to obtain powder for later use;
2) mixing and stirring the organic silicon emulsion and the polymer emulsion uniformly according to a certain proportion to obtain a compound emulsion, adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming auxiliary agent into the compound emulsion, and uniformly mixing the mixture according to a designed proportion to obtain a liquid material;
3) and mixing and stirring the powder and the liquid according to the designed powder-liquid ratio for 3-5 minutes, manually stirring for 1-3 minutes, and standing for 3-5 minutes to obtain the composite cement-based waterproof coating.
Further, in the step 2), the polymer emulsion is neoprene latex, and when the organic silicon emulsion and the neoprene latex are compounded, H with the mass concentration of 5% is adopted3BO3The solution is used as a pH regulator, the pH of the neoprene latex is regulated to 9-10, and then the neoprene latex and the organic silicon emulsion are compounded.
Further, in the step 2), the polymer emulsion is a mixture of neoprene latex and styrene-acrylic emulsion, and when the organic silicon emulsion, the neoprene latex and the styrene-acrylic emulsion are compounded, H with the mass concentration of 5% is adopted3BO3The solution is used as a pH regulator, the pH of the neoprene latex is regulated to 9-10, a stabilizer EmulvinW is dripped into the neoprene latex, then the styrene-acrylic emulsion is added to form a blended polymer emulsion, and the blended polymer emulsion is compounded with the organic silicon emulsion.
Compared with the prior art, the invention has the beneficial effects that:
(1) the composite cement-based waterproof coating provided by the invention is prepared by compounding the organic silicon emulsion used for preparing the permeable coating and the polymer emulsion used for preparing the surface film-forming coating, and the coating is prepared by compounding the emulsion, so that the coating is more compact, the waterproof effect is better, the corrosion resistance and durability of the waterproof coating can be obviously improved, the comprehensive performance of the coating is obviously improved, and the composite cement-based waterproof coating has the advantages of the surface permeable coating and the surface film-forming coating, namely the surface permeable coating can easily perform chemical action with a concrete base layer under the cement alkaline condition to form a net-shaped cross-linked structure to form a protective layer from inside to outside, the anticorrosion performance is excellent, and the surface film-forming coating can form a compact film with good performance on the concrete outer layer to completely cover the surface of a member.
(2) The composite cement-based waterproof coating provided by the invention has the waterproof effects of both permeable waterproof coatings and film-coated waterproof coatings. After the concrete member is in service for a long time, the coating film cracks and swells, water permeates into the concrete, at the moment, active substances in the coating permeate into the concrete along with the water to generate a permeation crystallization reaction to generate new gel and a hydrophobic product to block a capillary pore channel, the coating and a matrix are realized through the crystallization reaction of the active substances, the hydrophobicity of the coating is improved, and the service life of a concrete structure is prolonged.
(3) Compared with the existing polymer cement waterproof coating, the composite cement waterproof coating provided by the invention has the advantages that the organic silicon emulsion for preparing the permeable coating is added, so that the bonding strength between the composite cement waterproof coating and a concrete substrate is higher, and the comprehensive performance of the coating is better.
(4) In the preparation process of the composite cement-based waterproof coating, the stirring speed and the stirring time are strictly controlled, the influence of bubbles generated in the preparation process of the coating on the performance of the coating is eliminated, and the compatibility of each component in the compound emulsion and the stability of the compound emulsion are improved by adjusting the pH of the compound emulsion.
(5) The preparation method of the composite cement-based waterproof coating provided by the invention is simple, has low requirements on construction base materials, can shorten the construction period to a certain extent, and is easy to popularize.
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.
Example 1:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 92g of compound emulsion, 0.6g of coupling agent, 1.2g of defoaming agent, 0.1g of dispersing agent and 1.8g of film-forming assistant. The cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, the compound emulsion is a mixed emulsion of organosilicon emulsion and chloroprene rubber emulsion according to the mass ratio of 1:1, the coupling agent is KH-550 (namely gamma-aminopropyltriethoxysilane), the dispersing agent is polycarboxylate dispersing agent 5040, and the film-forming auxiliary agent is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating comprises the following steps: firstly, weighing quartz sand and cement, and uniformly stirring the quartz sand and the cement to be used as powder for later use; then, mixing and stirring the organic silicon emulsion and the chloroprene rubber emulsion uniformly to obtain a compound emulsion, adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming assistant into the compound emulsion, and mixing uniformly to obtain a liquid material; and finally, mixing and stirring the powder and the liquid for 3-5 minutes, after stirring is finished, manually stirring for 1-3 minutes, standing for 3-5 minutes, and reducing the influence of bubbles on the service performance of the coating to obtain the composite cement-based waterproof coating.
When the organic silicon emulsion and the chloroprene rubber latex are compounded, the pH value of the self-prepared organic silicon emulsion is 8-10, the pH value of the commercially available chloroprene rubber latex is 11-14, the organic silicon emulsion and the chloroprene rubber latex are directly mixed, and when the pH value of the chloroprene rubber latex is reduced to below 9, the chloroprene rubber latex is demulsified and separated out; therefore, in this embodiment, when the silicone emulsion and the neoprene emulsion are compounded, H with a mass concentration of 5% is first used3BO3The solution is used as a pH regulator, the pH of the neoprene latex is regulated to 9-10, and then the neoprene latex and the organic silicon emulsion are compounded to obtain the compounded emulsion with relatively good stability.
The test result shows that the influence of the stirring speed on the performance of the coating is found in the process of mixing the powder and the liquid, the liquid and the powder are mechanically stirred for 5min after being mixed, the sample is prepared under the low-speed stirring at the rotating speed of 300 r/min-500 r/min, the measured tensile strength is 1.48MPa, the fracture elongation is 379%, the sample is prepared under the high-speed stirring at the rotating speed of more than 800r/min, the measured tensile strength is 1.12MPa, and the fracture elongation is 263%.
Example 2:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 111g of compound emulsion, 0.6g of coupling agent, 1.4g of defoaming agent, 0.1g of dispersing agent and 2.2g of film-forming assistant. The cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, the compound emulsion is a mixed emulsion of organosilicon emulsion and chloroprene rubber emulsion according to the mass ratio of 1:1.5, the coupling agent is KH-550 (namely gamma-aminopropyltriethoxysilane), the dispersing agent is polycarboxylate dispersing agent 5040, and the film-forming auxiliary agent is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating of the embodiment is the same as that of the embodiment 1.
Example 3:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 92g of compound emulsion, 0.6g of coupling agent, 1.2g of defoaming agent, 0.1g of dispersing agent and 1.8g of film-forming assistant. The cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, the compound emulsion is a mixed emulsion of organosilicon emulsion and EVA emulsion according to the mass ratio of 1:1, the coupling agent is KH-550 (namely gamma-aminopropyltriethoxysilane), the dispersing agent is polycarboxylate dispersing agent 5040, and the film-forming auxiliary agent is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating comprises the following steps: firstly, weighing quartz sand and cement, and uniformly stirring the quartz sand and the cement to be used as powder for later use; then, mixing and stirring the organic silicon emulsion and the EVA emulsion uniformly to obtain a compound emulsion, adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming assistant into the compound emulsion, and mixing uniformly to obtain a liquid material; and finally, mixing and stirring the powder and the liquid for 3-5 minutes, after stirring is finished, manually stirring for 1-3 minutes, standing for 3-5 minutes, and reducing the influence of bubbles on the service performance of the coating to obtain the composite cement-based waterproof coating.
Example 4:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 111g of compound emulsion, 0.6g of coupling agent, 1.4g of defoaming agent, 0.1g of dispersing agent and 2.2g of film-forming assistant. The cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, the compound emulsion is a mixed emulsion of organosilicon emulsion and EVA emulsion according to the mass ratio of 1:1.5, the coupling agent is KH-550 (namely gamma-aminopropyltriethoxysilane), the dispersing agent is polycarboxylate dispersing agent 5040, and the film-forming auxiliary agent is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating of the embodiment is the same as that of the embodiment 3.
Example 5:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 92g of compound emulsion, 0.6g of coupling agent, 1.2g of defoaming agent, 0.1g of dispersing agent and 1.8g of film-forming assistant. The cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, the compound emulsion is a mixed emulsion of organosilicon emulsion and styrene-acrylic emulsion according to the mass ratio of 1:1, the coupling agent is KH-550 (namely gamma-aminopropyltriethoxysilane), the dispersant is polycarboxylate dispersant 5040, and the film-forming auxiliary agent is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating comprises the following steps: firstly, weighing quartz sand and cement, and uniformly stirring the quartz sand and the cement to be used as powder for later use; then, mixing and stirring the organic silicon emulsion and the styrene-acrylic emulsion uniformly to obtain a compound emulsion, adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming auxiliary agent into the compound emulsion, and mixing uniformly to obtain a liquid material; and finally, mixing and stirring the powder and the liquid for 3-5 minutes, after stirring is finished, manually stirring for 1-3 minutes, standing for 3-5 minutes, and reducing the influence of bubbles on the service performance of the coating to obtain the composite cement-based waterproof coating.
Example 6:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 111g of compound emulsion, 0.6g of coupling agent, 1.4g of defoaming agent, 0.1g of dispersing agent and 2.2g of film-forming assistant. The cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, the compound emulsion is a mixed emulsion of organosilicon emulsion and styrene-acrylic emulsion according to the mass ratio of 1:1.5, the coupling agent is KH-550 (namely gamma-aminopropyltriethoxysilane), the dispersing agent is polycarboxylate dispersing agent 5040, and the film-forming auxiliary agent is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating of the embodiment is the same as that of the embodiment 5.
Example 7:
the embodiment provides a composite cement-based waterproof coating, which comprises the following components: 65g of cement, 21g of quartz sand, 92g of compound emulsion, 0.6g of coupling agent, 1.2g of defoaming agent, 0.1g of dispersing agent and 1.8g of film-forming assistant. Wherein the cement is 42.5 type white cement, the particle size of quartz sand is 80-120 meshes, and the compound emulsion is an organic silicon emulsion, a chloroprene rubber emulsion and a styrene-acrylic emulsion in a mass ratio of 2: 1:1, the coupling agent is KH-550 (namely gamma-aminopropyl triethoxysilane), the dispersant is polycarboxylate dispersant 5040, and the film-forming assistant is propylene glycol butyl ether.
The preparation process of the composite cement-based waterproof coating comprises the following steps: firstly, weighing quartz sand and cement, and uniformly stirring the quartz sand and the cement to be used as powder for later use; then, compounding organosilicon emulsion, chloroprene rubber emulsion and styrene-acrylic emulsion to obtain compound emulsion, adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming auxiliary agent into the compound emulsion, and uniformly mixing to obtain a liquid material; and finally, mixing and stirring the powder and the liquid for 3-5 minutes, after stirring is finished, manually stirring for 1-3 minutes, standing for 3-5 minutes, and reducing the influence of bubbles on the service performance of the coating to obtain the composite cement-based waterproof coating.
In this example, when the silicone emulsion, the neoprene latex and the styrene-acrylic emulsion are compounded, H with the mass concentration of 5% is firstly adopted3BO3The solution is used as a pH regulator, the pH of chloroprene latex is regulated to 9-10, stabilizer EmulvinW (produced by Germany Bayer company) is dripped into chloroprene latex, styrene-acrylic emulsion is added to form blended polymer emulsion, and the blended polymer emulsion is compounded with organic silicon emulsion.
Comparative example:
the comparative example adopts the raw material formula of the composite cement-based waterproof coating in the example 7, and is different in the charging sequence, the composite cement-based waterproof coating of the comparative example is prepared by firstly adding the additive into the powder and then adding the compound emulsion, and the specific process is as follows: the process is as follows: firstly, weighing quartz sand and cement, uniformly stirring the quartz sand and the cement to be used as powder, and adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming auxiliary agent into the powder for later use; then, compounding the organic silicon emulsion, the chloroprene rubber emulsion and the styrene-acrylic emulsion to obtain a compound emulsion; and finally, mixing and stirring the compound emulsion and the mixture of the powder and the additive for 3-5 minutes, after the stirring is finished, manually stirring for 1-3 minutes, and standing for 3-5 minutes to obtain the compound cement-based waterproof coating.
The coatings prepared in the above examples 1-7 and comparative examples were tested by the architectural waterproof coating test method "GBT 16777-.
Table 1:
as can be seen from Table 1, the composite cement-based waterproof coating has high tensile strength and bonding strength with a concrete substrate, and has excellent waterproof performance and corrosion resistance. Comparing the performance results of example 7 and the comparative example, it can be seen that the charging sequence of the composite cement-based waterproof coating in the preparation process has a certain influence on the mechanical properties of the coating, i.e. the composite emulsion and the additive are mixed and then added into the powder for mixing and stirring, and the mechanical properties of the prepared coating are better than those of the coating prepared by adding the additive into the powder and then adding the composite emulsion.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (10)
1. The composite cement-based waterproof coating is characterized by comprising the following components in percentage by mass: 50-56% of compound emulsion, 32-36% of cement, 10-12% of quartz sand, 0.2-1.2% of coupling agent, 0.4-1.2% of defoaming agent, 0.05-0.15% of dispersing agent and 1-4% of film-forming assistant; wherein the compound emulsion is a mixture of organic silicon emulsion and polymer emulsion.
2. The composite cement-based waterproof coating as claimed in claim 1, wherein the mass ratio of the powder component to the liquid component in the components of the composite cement-based waterproof coating is 0.75-0.9, and the aggregate-cement ratio is 0.8: 1-1.1: 1.
3. The composite cement-based waterproof coating as claimed in claim 1, wherein the polymer emulsion is any one or more of neoprene latex, EVA emulsion, styrene-acrylic emulsion, styrene-butadiene emulsion, and epoxy resin emulsion.
4. The composite cement-based waterproof coating material as claimed in claim 3, wherein the solid content of the polymer emulsion is 45-65%.
5. The composite cement-based waterproof coating material as claimed in claim 1, wherein the coupling agent is KH-550.
6. The composite cement-based waterproof coating material as claimed in claim 1, wherein the dispersant is a polycarboxylate dispersant 5040.
7. The composite cement-based waterproof coating material as claimed in claim 1, wherein the film forming aid is propylene glycol butyl ether.
8. The preparation method of the composite cement-based waterproof coating as claimed in any one of claims 1 to 7, characterized by comprising the following steps:
1) weighing quartz sand and cement, and uniformly stirring to obtain powder for later use;
2) mixing and stirring the organic silicon emulsion and the polymer emulsion uniformly according to a certain proportion to obtain a compound emulsion, adding a coupling agent, a defoaming agent, a dispersing agent and a film-forming auxiliary agent into the compound emulsion, and uniformly mixing the mixture according to a designed proportion to obtain a liquid material;
3) and mixing and stirring the powder and the liquid according to the designed powder-liquid ratio for 3-5 minutes, manually stirring for 1-3 minutes, and standing for 3-5 minutes to obtain the composite cement-based waterproof coating.
9. The method for preparing the composite cement-based waterproof coating according to claim 8, wherein in the step 2), the polymer emulsion is neoprene latex, and when the organic silicon emulsion and the neoprene latex are compounded, the polymer emulsion is firstly adoptedWith 5% by mass of H3BO3The solution is used as a pH regulator, the pH of the neoprene latex is regulated to 9-10, and then the neoprene latex and the organic silicon emulsion are compounded.
10. The method for preparing a composite cement-based waterproof coating as claimed in claim 8, wherein in the step 2), the polymer emulsion is a mixture of neoprene latex and styrene-acrylic emulsion, and when the organosilicon emulsion is compounded with the neoprene latex and the styrene-acrylic emulsion, H with a mass concentration of 5% is firstly adopted3BO3The solution is used as a pH regulator, the pH of the neoprene latex is regulated to 9-10, a stabilizer EmulvinW is dripped into the neoprene latex, then the styrene-acrylic emulsion is added to form a blended polymer emulsion, and the blended polymer emulsion is compounded with the organic silicon emulsion.
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| CN113912323A (en) * | 2021-11-09 | 2022-01-11 | 海南鸿飞企业管理有限公司 | Auxiliary agent for cement gypsum product |
| CN114058239A (en) * | 2021-11-25 | 2022-02-18 | 深圳安盾海洋新材料有限公司 | Cement-based anti-permeability anticorrosive multilayer coating and application method thereof |
| CN115926542A (en) * | 2022-11-19 | 2023-04-07 | 北新防水(广东)有限公司 | Composite heat-insulating water-based waterproof coating |
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| CN114058239A (en) * | 2021-11-25 | 2022-02-18 | 深圳安盾海洋新材料有限公司 | Cement-based anti-permeability anticorrosive multilayer coating and application method thereof |
| CN114058239B (en) * | 2021-11-25 | 2023-01-10 | 深圳安盾海洋新材料有限公司 | Cement-based anti-permeability anticorrosive multilayer coating and application method thereof |
| CN115926542A (en) * | 2022-11-19 | 2023-04-07 | 北新防水(广东)有限公司 | Composite heat-insulating water-based waterproof coating |
| CN115926542B (en) * | 2022-11-19 | 2023-09-15 | 北新防水(广东)有限公司 | Composite heat-insulating water-based waterproof coating |
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Application publication date: 20210226 |