CN109135460B - High-strength high-water-resistance polymer emulsion building waterproof coating and preparation method thereof - Google Patents
High-strength high-water-resistance polymer emulsion building waterproof coating and preparation method thereof Download PDFInfo
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- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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Abstract
The invention discloses a high-strength high-water-resistance polymer emulsion building waterproof coating and a preparation method thereof. Comprises the following components: 400 parts of first pure acrylic emulsion 300-. According to the invention, two pure acrylic emulsions with different performances are compounded, and the waterproof coating is prepared under the condition that no plasticizer, film forming additive, alcohol anti-freezing agent and other volatile additives are added, so that the waterproof coating meets the 300% elongation at break and-20 ℃ low-temperature flexibility indexes, and has the advantages of low VOC, low ammonia content, excellent environmental protection performance, strong thermal stability and difficult aging.
Description
Technical Field
The invention belongs to the field of waterproof materials, and particularly relates to a high-strength high-water-resistance polymer emulsion building waterproof coating and a preparation method thereof.
Background
The polymer emulsion building waterproof coating is a single-component water emulsion type waterproof coating prepared by taking polymer emulsion as a main raw material and adding other additives, has better base layer cracking resistance due to higher elongation of a coating film, is used after being opened, is convenient and fast to construct, is generally used in building waterproof engineering in a non-long-term water immersion environment, and is generally called as an acrylic waterproof coating in the market. Chinese patent application CN201610012228.1 discloses that the waterproof coating prepared from acrylic emulsion and barium sulfate as main raw materials has good acid and alkali resistance, and organic bentonite is added to prevent the delamination problem. The Chinese patent application CN201410459351.9 discloses that acrylic acid, EVA emulsion and mixed filler are used as main raw materials to prepare waterproof paint, and photocatalyst and diatomite are added to adsorb and degrade harmful volatile substances, so as to achieve the purpose of improving environmental protection.
At present, the polymer emulsion building waterproof coating executes JC/T864-2008 polymer emulsion building waterproof coating standard, while the prior art generally executes I-type index, and mainly has the following problems:
1. low untreated tensile strength and poor adhesion of the base layer
The polymer emulsion building waterproof coating is a single component, requires the elongation at break to reach more than 300 percent, belongs to a water-based coating with extremely high flexibility, does not contain cement and other cementing materials in the filling except the emulsion in the composition, and mainly combines the emulsion and the inorganic filling to provide mechanical strength. The relatively loose combination causes that the untreated tensile strength and the bonding force with the base layer are low, and JC/T864-2008 'Polymer emulsion waterproof building coating' does not stipulate the bonding strength, but in the actual construction and application process, the base surface is often not firm and flat enough and easy to fall ash due to maintenance, so that the traditional polymer emulsion waterproof building coating has great limitation.
2. The coating film has high water absorption and poor water resistance
The traditional polymer emulsion has a certain water absorption rate, the water absorption performance of the emulsion is changed due to the addition of the filler, a large amount of emulsifier and the like are used in the preparation process of the high-molecular emulsion forming the coating, some substances can be dissolved in water, so that the phenomenon of 'secondary emulsification' of the cured coating occurs, the waterproof material absorbs water after soaking, the distance between molecules is large, the combination of the emulsion and the filler is further damaged, the retention rate of the tensile strength after soaking is reduced and is generally lower than 60%, and the service life is more limited due to the fact that the tensile strength of the polymer emulsion waterproof coating is lower.
3. High VOC and ammonia content and weak anti-aging capability
Because the polymer emulsion building waterproof coating requires lower low-temperature flexibility and 300% elongation at break, the VOC is higher due to the fact that the general formula contains the plasticizer, the film forming additive, the alcohol antifreezing agent and other volatile substances, and meanwhile, the substances are unstable when heated, so that the material is easy to age, and the elasticity of a coating film is reduced. In addition, the acrylic emulsion contains amide groups (N-hydroxymethyl acrylamide), and ammonia water is adopted as a pH regulator, so that the ammonia content of the polymer emulsion building waterproof coating is generally higher than 500mg/kg, and the environmental protection property is poor.
4. Easy bleeding after long-term standing and easy blanking during roller coating construction
The polymer emulsion building waterproof coating is a single component and can be used after being opened, because the polymer emulsion, water and inorganic filler are mixed and then stand for a long time, the viscosity is unstable under the condition of low shearing force, particularly when the coarse and fine grading of the filler is not matched and the dispersibility is poor, the solid generates gradient change on a vertical plane, a lower layer generates a hard object, an upper layer generates liquid, and bleeding layering occurs. The traditional polymer emulsion building waterproof coating is added with organic bentonite as an anti-settling agent, needs to be pre-dispersed in water in the production process, has a complex process, and has the defects of difficult dispersion and easy deterioration of the bentonite.
The waterproof coating prepared from most of the existing acrylic emulsion has good thixotropy, low viscosity under high shear force and excessive smoothness in roller coating construction, the coating is not easy to stick on a base surface and a waterproof layer surface in the vertical surface roller coating process, the coating falls off under the action of gravity, the thickness of the coating cannot reach 1.2-1.5 mm after 2-3 times of construction, and the coating needs 3-4 times of construction roller coating, thereby wasting time and energy. In addition, the traditional polymer emulsion building waterproof coating has the ultimate low-temperature flexibility of-10 to-15 ℃, and cannot meet the cracking resistance requirement under the severe cold condition in winter in the north.
Along with the social and economic development, the requirements on the performance of building materials are higher and higher, the national standard administration committee issues GB/T35609 + 2017 New Standard of Green product evaluation waterproof and sealing Material at 2017, 12 and 08, and the new standard is formally implemented at 2018, 7 and 1, wherein the environmental protection index and the water resistance index of the polymer emulsion building waterproof coating are greatly improved, the waterproof material is not dried after being soaked for 7 days, and is maintained for 24 hours under the standard maintenance condition of 23 ℃ for testing, and the tensile strength retention rate is required to be more than 80 percent; the ammonia content is lower than 500 mg/kg; VOC is less than 10g/L and the like. Most of the polymer building waterproof coatings on the market do not meet the requirements.
Meanwhile, the polymer emulsion building waterproof coating is generally prepared into a single-component coating by taking acrylate emulsion as a base material, talcum powder, barium sulfate, quartz powder and the like as fillers and various auxiliary agents as auxiliary materials. The constructed wet film gradually volatilizes along with the moisture, the polymer particles in a dispersion state gradually approach to the particles of the filler until the adsorption layers on the surfaces of the particles are damaged to become irreversible mutual contact, a tight packing state is achieved, the polymer particles deform and mutually coalesce to form a continuous paint film under the action of capillary force in the later period, and meanwhile, the interfacial molecular chains mutually diffuse, permeate and wind to further improve the strength of the paint film. The paint film does not contain any polymerization reaction and cement hydration, and is formed by winding and combining the polymer emulsion and the filler, and although the paint film has higher ductility, the mechanical strength and the water resistance are poor. The contradictory properties of tensile strength and elongation at break are not compatible with each other by a single polymer emulsion. Meanwhile, the harmful substances of the waterproof coating mainly come from the polymer emulsion and the volatile auxiliary agent, so that the polymer emulsion is selected as a key point.
Disclosure of Invention
The invention aims to solve the problems of low tensile strength, poor adhesion with a base layer, poor water resistance and environmental protection, easy blanking in construction roller coating and the like in the prior art, and provides a polymer emulsion building waterproof coating which has high tensile strength, excellent environmental protection performance, good water resistance, no blanking in construction and good mechanical detection performance, and meets the II type standard in JC/T864-2008.
In order to achieve the above object, a first aspect of the present invention provides a high-strength high-water-resistance polymer emulsion building waterproof coating, which comprises the following components:
400 parts by weight of first pure acrylic emulsion 300-; the glass transition temperature of the first pure acrylic emulsion is-25 to-30 ℃, and the glass transition temperature of the second pure acrylic emulsion is-35 to-40 ℃.
In the present invention, the first pure acrylic emulsion and the second pure acrylic emulsion may be pure acrylic emulsions that satisfy the above conditions and are conventionally used by those skilled in the art.
In a preferred embodiment of the present invention, the particle size of the first pure acrylic emulsion is 50 to 80 nm; the particle size of the second pure acrylic emulsion is 50-80 nm; the first pure acrylic emulsion and the second pure acrylic emulsion adopt alcohols which are difficult to volatilize as pH regulators to reduce the ammonia content in the preparation process
The pure acrylic emulsion selected by the invention can be obtained commercially, and as a preferred embodiment of the invention, the pure acrylic emulsion can be prepared by the following requirements:
a. the preparation process does not contain amide groups (N-hydroxymethyl acrylamide);
b. the particle size of the pure acrylic emulsion is controlled to be 50-80 nm, the dosage of the non-ionic emulsifier is controlled to be 3-4% during preparation, and the prepared emulsion meets the condition that the water absorption rate is less than or equal to 3% according to JC/T1017-one 2006 Polymer emulsion for building waterproof paint;
c. the ammonia content is further reduced by adopting a non-volatile alcohol substance (such as 2-amino-2-methyl-1-propanol) to replace the traditional ammonia water as a regulator to regulate the pH value.
As a more preferable embodiment of the invention, the first pure acrylic emulsion is preferably Dow 8556 emulsion, the glass transition temperature of the emulsion is-28 ℃, the water absorption rate of the emulsion is lower than 3%, and nonvolatile alcohol is selected as a pH regulator in the preparation process; the second pure acrylic emulsion is preferably Dow 1791 emulsion, the glass transition temperature of the second pure acrylic emulsion is-40 ℃, the water absorption of the second pure acrylic emulsion is lower than 3%, and nonvolatile alcohol is selected as a PH regulator in the preparation process.
As a preferred embodiment of the present invention, the dispersant includes 2 to 4 parts by weight of a powder dispersant and 3 to 6 parts by weight of a liquid dispersant.
In a preferred embodiment of the present invention, the powder dispersant is an inorganic phosphate-based dispersant, and the liquid dispersant is a sodium polyacrylate dispersant.
As a more preferred embodiment of the present invention, the powder dispersant is potassium tripolyphosphate KTPP (technical grade) dispersant, and the liquid dispersant is romart 731A dispersant.
The potassium tripolyphosphate is used as a powder dispersant for dispersing kaolin, so that the kaolin can be compatible with the precipitated barium sulfate and fully suspended in the polymer emulsion in the stirring and mixing process, and the sodium polyacrylate dispersant can improve the dispersibility of the whole coating.
As a preferred embodiment of the present invention, the thickener is a complex thickener, the complex thickener includes a thickener for increasing the viscosity under high shear force of the paint and a thickener for increasing the viscosity under low shear force of the paint, and both the thickener for increasing the viscosity under high shear force of the paint and the thickener for increasing the viscosity under low shear force are associative polyurethane type thickeners.
An associative polyurethane thickener is selected as a thickener for improving the viscosity of the coating under low shear force, micelles are formed in a water system through lipophilic groups in molecular chains to improve the viscosity of the system, the viscosity of the polymer emulsion building waterproof coating under low shear force is improved, bentonite is replaced, the viscosity of the coating is higher when the coating is kept stand, and powder settlement and liquid precipitation are prevented. Meanwhile, another associative polyurethane thickener is used as a high-shear thickener, and lipophilic groups in molecular chains are associated with high-molecular emulsion particles to form a net structure to establish high-shear viscosity, so that the high-shear viscosity can be adhered to a base surface or a waterproof layer in the construction roller coating process.
Particularly preferably, the thickener for improving the viscosity of the coating under low shear force is Rohm-8W thickener, and the thickener for improving the viscosity of the coating under high shear force is Rohm-2020 thickener.
The compatibility of the inorganic filler and the polymer emulsion is poor, heat is generated in the process of direct mixing and stirring, and the cooling shrinkage rate of the organic resin is much larger than that of the inorganic filler, so that the interface is separated to form fine pinholes, the bonding capacity of the resin and the inorganic filler is reduced, and the strength is reduced due to micropores formed in the material. The coupling agent is adopted, so that the combination of the polymer emulsion and the inorganic filler can be promoted, and the strength and the water resistance of the waterproof material are improved.
In a preferred embodiment of the present invention, the coupling agent is a silane coupling agent. The silane coupling agent is preferably 3- (2, 3-epoxypropoxy) propyl trimethoxy silane with the structural formula
The silane coupling agent contains two groups with different chemical properties in the molecule, one is an inorganophilic group Si (OCH)3)3Easily hydrolyzed and connected with the substances in the inorganic filler in a chemical bond formTaken together, the other being an organophilic group
It is non-hydrolyzable and capable of forming hydrogen bonds with synthetic resins to be dissolved therein. The bonding force of the inorganic filler and polymer emulsion molecules is strengthened by adding the silane coupling agent, and the inorganic filler is basically stable after the bonding is saturated. The coating can form a compact and continuous coating after being dried, has higher strength and water resistance, has small surface tension and can be better adsorbed on the surface of a base layer. Particularly preferably, the silane coupling agent is Dow Corning Z6040 coupling agent.
In a preferred embodiment of the present invention, the defoaming agent is a polyether type defoaming agent, and is particularly preferably a basf 2706 defoaming agent.
In the present invention, the preservative may be selected from preservatives conventionally used by those skilled in the art, and more preferably, the preservative is a Solms preservative which has the advantage of being free of bronopol, formaldehyde and formaldehyde donor.
As a preferred embodiment of the invention, the inorganic filler comprises 200 parts by weight of 100-200 parts by weight of kaolin and 350 parts by weight of precipitated barium sulfate, more preferably, the particle size of the kaolin is 800-1200 meshes, and the particle size of the precipitated barium sulfate is 400-800 meshes.
The precipitated barium sulfate is used as a main filler, so that the waterproof material has good flexibility, and in order to avoid the oil absorption value of the precipitated barium sulfate and the over-low viscosity of a coating system, kaolin with a high oil absorption value is used for compounding, so that the viscosity of the coating is increased, the thickening is easy, and a stable state is achieved.
The second aspect of the present invention provides a preparation method of the high-strength high-water-resistance polymer emulsion building waterproof coating, which comprises:
(1) sequentially adding water, a dispersing agent and a defoaming agent into a reaction kettle, and mixing and stirring;
(2) adding the pure acrylic emulsion and the coupling agent, and mixing and stirring;
(3) adding kaolin, precipitated barium sulfate and a dispersant, mixing and stirring;
(4) adding a thickening agent and a preservative, mixing and stirring;
(5) and mechanically defoaming to obtain the high-strength high-water-resistance polymer emulsion building waterproof coating.
As a preferred embodiment of the present invention,
in the step (1), the stirring speed is 200-;
in the step (2), the stirring speed is 300-500r/min, and the stirring time is 4-8 min;
in the step (3), the stirring speed is 500-800r/min, and the stirring time is 10-12 min;
in the step (4), the stirring speed is 500-;
in the step (5), the stirring speed is 200-300r/min, and the stirring time is 2-4 min.
The invention has the beneficial effects that:
1. according to the invention, two pure acrylic emulsions with different performances are compounded, and the waterproof coating is prepared under the condition that no plasticizer, film-forming additive, alcohol anti-freezing agent and other volatile additives are added, so that the waterproof coating meets the 300% elongation at break and-20 ℃ low-temperature flexibility indexes, has low VOC and ammonia content, excellent environmental protection performance, strong thermal stability and difficult aging, and solves the problems of acrylic emulsion VOC and high ammonia content in the polymer emulsion building waterproof coating;
2. according to the invention, by controlling the particle size and the using amount of the emulsifier, the water absorption of the polymer emulsion is reduced, the condition of 'secondary emulsification' of the emulsion and the filler is relieved, the loss of strength after soaking is small, the water resistance is higher, and the problem that the polymer emulsion building waterproof coating has no strength after soaking is solved;
3. the specific coupling agent is added to promote the combination of the polymer emulsion and the inorganic filler, a compact paint film is formed in the construction, the paint has higher strength and base bonding performance, and the problems that the polymer emulsion building waterproof paint only has flexibility and too low strength are solved;
4. two inert fillers with different oil absorption values are compounded, and a powder dispersing agent and a liquid dispersing agent are simultaneously used as auxiliary materials, so that the inorganic filler is fully dispersed in a coating system to achieve a stable compatible state, is easy to thicken, ensures no layering during standing, does not fall during roller coating, and solves the problems of poor storage property and no construction thickness of the polymer emulsion building waterproof coating.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 shows a simplified flow diagram of a production process according to an embodiment of the invention.
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.
Example (A)
Examples 1-7 the ingredients of the water-repellent coating are shown in the following table:
table 1 examples 1-7 water resistant coating compositions
The implementation method comprises the following steps:
metering deionized water, Rohm and Haas 731A dispersant and Pasteur 2706 antifoaming agent, adding into a liquid material stirring cylinder, starting a dispersing machine of the stirring cylinder, adjusting the rotating speed to 300r/min, and stirring for 2 minutes, as shown in FIG. 1.
② adding the Dow 8556 emulsion, the Dow 1791 emulsion and the Dow Corning Z6040 coupling agent into a liquid material stirring cylinder after metering, adjusting the rotating speed to 500r/min and stirring for 5 minutes.
Metering kaolin, precipitated barium sulfate and industrial potassium tripolyphosphate KTPP, slowly adding into a stirring cylinder, adjusting the rotating speed to 800r/min, and stirring for 10 minutes.
Metering Rohm-8W thickener, Rohm-2020 thickener and Soler MBS preservative, adding into a liquid material stirring cylinder, maintaining the rotation speed of 800r/min, and stirring for 5 minutes.
And fifthly, reducing the rotating speed to 300r/min, stirring for 3 minutes, mechanically defoaming to obtain the single-component waterproof coating, and filling a finished product.
(II) test example
The main performance test results corresponding to the above examples:
(1) mechanical properties
The performance of the polymer emulsion waterproof coating for buildings is tested according to JC/T864-2008-
TABLE 2 mechanical Properties
The above embodiments all conform to type II standards, wherein the strength can reach 2.5MPa, and far exceeds the standards, the tensile strength retention rate of artificial weathering treatment is higher than 90%, and the mechanical properties are excellent.
(2) Low temperature flexibility
The extreme low temperature of each example was tested according to the Medium-Low temperature flexibility test method in JC/T864-2008 "Polymer emulsion building Water-resistant coatings" 5.4.4.
TABLE 3 Low temperature flexibility test
The low-temperature flexibility of the embodiments is lower than-20 ℃, and the low-temperature anti-cracking performance is excellent.
(3) Water resistance
Water absorption:
the water absorption of each example was tested as in JG/T375 and 2012 "Metal roofing acrylic high resilience Water-proofing coating" at 6.64.
Table 4 water absorption test
The water absorption of the paint film of the embodiment is within 10 percent, and the performance attenuation of the waterproof layer caused by water absorption of the paint film can be effectively relieved.
Water resistance:
the water immersion performance of each example is tested according to B.12.2.1 in GB/T35609-2017 'Green product evaluation waterproof and sealing material'.
TABLE 5 Water resistance test
The tensile strength retention rate of the above examples after soaking in water exceeds 90%, and the water resistance is excellent.
(4) Adhesive property
Tested according to 7.4.3 in GB/T23445-2009 Polymer Cement waterproofing paint.
TABLE 6 bond Strength
The bonding strength of the above embodiments is greater than 0.6MPa, and the above embodiments have good bonding property with the base layer, and can be adapted to base surface construction under different conditions.
(5) Elevation construction thickness
The above examples were roll coated on a facade base layer three times at 12h intervals.
TABLE 7 film formation thickness
The roller coating construction of the embodiment is carried out for three times, the construction hand feeling is smooth, the thickness can reach 1.4mm, and the problems of construction blanking and no thickness are solved.
(6) Storage stability
Each of the above examples was loaded into a 1000ml common plastic bottle, and respectively placed in a standard curing condition at 23 ℃ and an oven at 40 ℃ for three months.
TABLE 8 storage stability
The above examples have good storage stability at normal temperature and high temperature, and no bleeding and delamination occur.
Environmental protection performance
The content of harmful substances was tested according to the 4.3.3 table of GB/T35609-2017 'Green product evaluation waterproof and sealing Material', as shown in Table 9.
TABLE 9 environmental protection Properties
Attached: VOC test is less than 1g/L, and formaldehyde content is less than 5 mg/kg.
In the above examples, no VOC and no formaldehyde were detected, and the ammonia content was less than 130mg/kg, which met the standards and was excellent in environmental protection.
The above embodiments all have good mechanical properties, environmental protection properties, workability and environmental protection properties.
From the examples 1, 2 and 3, it can be seen that the elongation at break and tensile strength of the high-strength and high-water-resistance polymer emulsion building waterproof coating tend to decrease with the increase of the Dow 1791 pure acrylic emulsion component, but the weather resistance, water resistance and extreme low temperature performance are greatly improved.
From examples 2 and 4, it can be seen that the tensile strength of the high-strength and high-water-resistance polymer emulsion building waterproof coating increases with the increase of the water addition amount, but the elongation at break, the water resistance and the low-temperature resistance are reduced.
From examples 4 and 7, it can be seen that as the kaolin content of the filler increases, less RM-8W of thickener is required to increase the viscosity under low shear in the coating, and the water resistance decreases.
From the examples 2, 5 and 6, it can be seen that the elongation at break of the high-strength and high-water-resistance polymer emulsion building waterproof coating is reduced, the tensile strength is increased, and the water resistance, the weather resistance and the bonding performance are all improved along with the increase of the dosage of the coupling agent Z6040.
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 (5)
1. The high-strength high-water-resistance polymer emulsion building waterproof coating is characterized by comprising the following components:
400 parts by weight of first pure acrylic emulsion 300-; the glass transition temperature of the first pure acrylic emulsion is-25 to-30 ℃, and the glass transition temperature of the second pure acrylic emulsion is-35 to-40 ℃;
the particle size of the first pure acrylic emulsion is 50-80 nm; the particle size of the second pure acrylic emulsion is 50-80 nm; in the preparation process of the first pure acrylic emulsion and the second pure acrylic emulsion, alcohols which are difficult to volatilize are used as pH regulators to reduce the ammonia content;
the first pure acrylic emulsion and the second pure acrylic emulsion meet the following requirements: the preparation process does not contain amide groups, and the dosage of the non-ionic emulsifier is controlled to be 3-4% during preparation;
the inorganic filler comprises 200 parts by weight of kaolin 100 and 350 parts by weight of precipitated barium sulfate 250;
the thickening agent is a composite thickening agent, the composite thickening agent comprises a thickening agent for improving the viscosity of the coating under high shear force and a thickening agent for improving the viscosity of the coating under low shear force, and the thickening agent for improving the viscosity of the coating under high shear force and the thickening agent for improving the viscosity of the coating under low shear force are associative polyurethane type thickening agents.
2. The high-strength high-water-resistance polymer emulsion building waterproof coating material as claimed in claim 1, wherein the dispersant comprises 2-4 parts by weight of inorganic phosphate powder dispersant and 3-6 parts by weight of sodium polyacrylate liquid dispersant.
3. The high-strength high-water-resistance polymer emulsion building waterproof coating material as claimed in claim 1, wherein the coupling agent is a silane coupling agent, and the defoaming agent is a polyether defoaming agent.
4. The method for preparing the high-strength high-water-resistance polymer emulsion building waterproof coating material as claimed in any one of claims 1 to 3, which is characterized by comprising the following steps:
(1) sequentially adding water, a dispersing agent and a defoaming agent into a reaction kettle, and mixing and stirring;
(2) adding the pure acrylic emulsion and the coupling agent, and mixing and stirring;
(3) adding kaolin, precipitated barium sulfate and a dispersant, mixing and stirring;
(4) adding a thickening agent and a preservative, mixing and stirring;
(5) and mechanically defoaming to obtain the high-strength high-water-resistance polymer emulsion building waterproof coating.
5. The production method according to claim 4,
in the step (1), the stirring speed is 200-;
in the step (2), the stirring speed is 300-500r/min, and the stirring time is 4-8 min;
in the step (3), the stirring speed is 500-800r/min, and the stirring time is 10-12 min;
in the step (4), the stirring speed is 500-;
in the step (5), the stirring speed is 200-300r/min, and the stirring time is 2-4 min.
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| CN112852239A (en) * | 2020-12-29 | 2021-05-28 | 重庆中防德邦防水技术有限公司 | Organic/inorganic composite coating capable of independently forming gradient distribution layer |
| CN113174171A (en) * | 2021-04-19 | 2021-07-27 | 广东能辉新材料科技有限公司 | Anti-sticking composite waterproof coiled material, anti-sticking coating and preparation method thereof |
| CN113637376B (en) * | 2021-09-14 | 2022-11-29 | 海南红杉科创实业有限公司 | Building waterproof coating and preparation method thereof |
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| CN104845479A (en) * | 2015-05-30 | 2015-08-19 | 安徽美琳建筑材料有限公司 | External wall elastic topcoat |
| CN105400309A (en) * | 2015-12-21 | 2016-03-16 | 潍坊市宏源防水材料有限公司 | Fumed silica modified acrylate waterproof paint, and preparation method thereof |
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| CN103819990A (en) * | 2014-02-28 | 2014-05-28 | 北京东方雨虹防水技术股份有限公司 | Highly-elastic waterproof coating used for metal roof and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104845479A (en) * | 2015-05-30 | 2015-08-19 | 安徽美琳建筑材料有限公司 | External wall elastic topcoat |
| CN105400309A (en) * | 2015-12-21 | 2016-03-16 | 潍坊市宏源防水材料有限公司 | Fumed silica modified acrylate waterproof paint, and preparation method thereof |
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