Decorative and waterproof integrated coating for renewing of outer wall and preparation method of decorative and waterproof integrated coating

Abstract

The invention provides a decorative and waterproof integrated coating for renewing an outer wall and a preparation method thereof, the decorative and waterproof integrated coating comprises a liquid material component and a powder material component, and the powder material component comprises a gel material, slag powder, boiler ash, cellulose ether, starch ether, a filler, an anti-efflorescence agent and an aggregate; and the liquid material component comprises a small-particle-size pure acrylic emulsion, butyronitrile latex, halloysite, titanium dioxide, heavy calcium carbonate powder, a dispersing agent, a wetting agent, a defoaming agent, a preservative, inorganic toner, organic color paste and water. The decorative and waterproof integrated coating prepared by the invention has the advantages of good waterproofness, high strength, good bonding force, good crack resistance, good weather resistance and good heat-insulating and flame-retardant effects.

Description

Technical Field

[0001] The present invention relates to the technical field of building waterproofing, and in particular to a decorative waterproof integrated coating for exterior wall renewal and a preparation method thereof. Background Art

[0002] With the acceleration of the modernization of cities in my country, special coatings used in exterior wall renovation are attracting widespread attention due to their irreplaceable advantages. They can be painted or sprayed, are quickly formed, and are low-cost, making them ideal materials for the new generation of building renovation. However, as time goes by and people's housing standards improve, the existing ordinary exterior wall waterproof coatings directly applied to renovation have exposed many problems, such as poor weather resistance, aesthetics, heat insulation, low strength, etc. In addition, hollowing, delamination, and cracking are also difficult to control. Summary of the invention

[0003] The object of the present invention is to provide a decorative waterproof integrated coating for exterior wall renewal and a preparation method thereof, which has the advantages of good waterproofness, high strength, good adhesion, good crack resistance, good weather resistance, and good heat insulation and flame retardant effects.

[0004] To achieve this object, the present invention adopts the following technical solutions: The present invention provides a decorative waterproof integrated coating for exterior wall renewal, wherein the components of the decorative waterproof integrated coating include: a liquid component and a powder component, wherein the weight ratio of the liquid component to the powder component is 1:1; In parts by mass, 1000 parts of the powder component include: 200-300 parts of gel material, 40-60 parts of slag powder, 100-150 parts of boiler ash, 0.5-1 part of cellulose ether, 0.3-0.5 part of starch ether, 200-250 parts of filler, 1-3 parts of anti-efflorescence agent and the balance of aggregate; Calculated by weight, 1000 parts of the liquid component include: 400-450 parts of small-particle pure acrylic emulsion, 150-200 parts of nitrile latex, 50-100 parts of halloysite, 50-100 parts of titanium dioxide, 100-150 parts of heavy calcium powder, 4-6 parts of dispersant, 1-3 parts of wetting agent, 3-5 parts of defoaming agent, 2-4 parts of preservative, 6-8 parts of inorganic color powder, 0.5-1.5 parts of organic color paste and the balance of water.

[0005] As a preferred solution for decorative waterproof integrated coating for exterior wall renewal, the gel material is P.I52.5 cement, the fineness of the slag powder is 1000 mesh, the unburned carbon content of the boiler ash is ≤1%, the viscosity of the cellulose ether is 40000 mPa·s, the filler is 200 mesh quartz powder, and the aggregate is 70-140 mesh quartz sand.

[0006] As a preferred solution for decorative waterproof integrated coating for exterior wall renewal, the particle size of the small-particle pure acrylic emulsion is 50-120 mm, the particle size of the halloysite is 100 nm-300 nm, the fineness of the heavy calcium powder is 800 mesh, the dispersant is dispersant 5040, the wetting agent is wetting agent LCN407, the defoamer is defoamer 6800, and the preservative is Kathon preservative.

[0007] The present invention also provides a method for preparing the decorative waterproof integrated coating for exterior wall renewal as described in any one of the above items, comprising the following steps: Premixing of powder components: using ultrasonic mixing equipment to premix slag powder, filler, boiler ash, starch ether and anti-efflorescence agent for 10 minutes to prepare a powder masterbatch; Preparation of powder component: Add powder masterbatch, gel material, cellulose ether and aggregate into a dry mortar mixer and stir for 5 minutes to prepare powder component; Premixing of liquid components: using ultrasonic mixing equipment to premix halloysite, titanium dioxide, and heavy calcium powder for 10 minutes to prepare a liquid masterbatch; Preparation of liquid component: Add small particle size styrene acrylic emulsion, nitrile latex, wetting agent, defoaming agent and dispersant into a coating disperser and stir for 5 minutes, then add liquid masterbatch, wetting agent, inorganic color powder and organic color paste while stirring, finally add water and preservative, stir thoroughly for 20 minutes to obtain liquid component; Preparation of coating: Take a liquid component and a powder component in a weight ratio of 1:1, first pour the liquid component, then slowly add the powder component, stir for 3-5 minutes, and prepare the coating.

[0008] Beneficial effects of the present invention: (1) The use of ultra-fine halloysite, small-particle pure acrylic emulsion, inorganic color powder and other components, and the use of high-grade silicate cement P.I52.5 and a large amount of gel material effectively reduces the efflorescence of cement and improves the weather resistance and color fixing effect of the material; (2) Adding nitrile latex to the liquid component improves the crack resistance of the material itself, using high-activity circulating fluidized bed boiler ash as auxiliary adhesive in the powder component to reduce the shrinkage rate, and adding ultra-fine slag powder to the powder component to reduce the shrinkage of the adhesive. Therefore, the coating has good anti-cracking properties; (3) The addition of halloysite improves the flame retardancy, solar reflectivity and hemispherical emissivity of the material, and has a certain heat insulation effect, making it particularly suitable for exterior wall renovation and urban renewal; (4) The advantages of the two-component cement-based powder component and the high-strength emulsion liquid component are utilized to improve the bonding strength of the material. Small-particle pure acrylic emulsion and nitrile latex are used to improve the two-way penetration effect, greatly improving the bonding strength. Ultrasonic premixing is used to improve uniformity and the strength of the material. Circulating fluidized bed boiler ash is used as an auxiliary cementitious material in the powder component. Therefore, the coating has good bonding strength. (5) The use of ultrasonic premixing not only improves the uniformity of liquid and powder components, but also reduces the mixing time, reduces production time, and improves production efficiency; In summary, the coating prepared by the present invention has the advantages of good waterproofness, high strength, good adhesion, good crack resistance, good weather resistance, and good heat insulation and flame retardant effects. DETAILED DESCRIPTION

[0009] The embodiments of the present disclosure are described in detail below.

[0010] The following is an explanation of the embodiments of the present disclosure by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, under the premise of non-conflict, the embodiments described below or the technical features can be arbitrarily combined to form a new embodiment. If the specific conditions are not indicated in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. The components used without indicating the manufacturer are all conventional products that can be purchased commercially. The components used in the embodiments can be purchased conventionally from the market unless otherwise specified. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0011] Example 1 Weigh the following components by mass: 1t of powder component, including: Cementitious material (PI 52.5 cement) 250kg Slag powder (fineness 1000 mesh) 50kg Circulating fluidized bed boiler ash (unburned carbon content ≤ 1%) 125kg Cellulose ether (HK40000S viscosity is 40000mPa•s) 0.75kg Starch ether Avibe 301 0.4kg Filler (200 mesh quartz powder) 225kg Anti-panning agent QC1711 2kg Aggregate (70-140 mesh quartz sand) Remainder 1t of liquid component, including: Small particle size pure acrylic emulsion (particle size 50~120nm) 425kg Nitrile latex 175kg Halloysite (particle size 100nm~300nm) 75kg Titanium dioxide TR-996 75kg Heavy calcium powder (800 mesh) 125kg Dispersant 5040 5kg Wetting agent LCN407 2kg Defoamer 6800 4kg Kasong preservative 3kg Inorganic color powder iron oxide yellow 313 7kg Organic color paste lemon yellow paste 8810 1kg Water Remaining The coating was prepared according to the following steps: Premixing of powder components: using ultrasonic mixing equipment to premix slag powder, filler, boiler ash, starch ether and anti-efflorescence agent for 10 minutes to prepare a powder masterbatch; Preparation of powder component: Add powder masterbatch, gel material, cellulose ether and aggregate into a dry mortar mixer and stir for 5 minutes to prepare powder component; Premixing of liquid components: using ultrasonic mixing equipment to premix halloysite, titanium dioxide, and heavy calcium powder for 10 minutes to prepare a liquid masterbatch; Preparation of liquid component: Add small particle size styrene acrylic emulsion, nitrile latex, wetting agent, defoaming agent and dispersant into a coating disperser and stir for 5 minutes, then add liquid masterbatch, wetting agent, inorganic color powder and organic color paste while stirring, finally add water and preservative, stir thoroughly for 20 minutes to obtain liquid component; Preparation of coating: Take a liquid component and a powder component in a weight ratio of 1:1, first pour the liquid component, then slowly add the powder component, stir for 3-5 minutes, and prepare the coating.

[0012] Example 2 Weigh the following components by mass: 1t of powder component, including: Cementitious material (PI 52.5 cement) 200kg Slag powder (fineness 1000 mesh) 40kg Circulating fluidized bed boiler ash (unburned carbon content ≤ 1%) 100kg Cellulose ether (HK40000S viscosity is 40000mPa•s) 0.5kg Starch ether Avibe 301 0.3kg Filler (200 mesh quartz powder) 200kg Anti-panning agent QC1711 1kg Aggregate (70-140 mesh quartz sand) Remainder 1t of liquid component, including: Small particle size pure acrylic emulsion (particle size 50~120nm) 400kg Nitrile latex 150kg Halloysite (particle size 100nm~300nm) 50kg Titanium dioxide TR-996 50kg Heavy calcium powder (800 mesh) 100kg Dispersant 5040 4kg Wetting agent LCN407 1kg Defoamer 6800 3kg Kasong preservative 2kg Inorganic color powder iron oxide yellow 313 6kg Organic color paste lemon yellow paste 8810 0.5kg Water Remaining The coating was prepared according to the following steps: Premixing of powder components: using ultrasonic mixing equipment to premix slag powder, filler, boiler ash, starch ether and anti-efflorescence agent for 10 minutes to prepare a powder masterbatch; Preparation of powder component: Add powder masterbatch, gel material, cellulose ether and aggregate into a dry mortar mixer and stir for 5 minutes to prepare powder component; Premixing of liquid components: using ultrasonic mixing equipment to premix halloysite, titanium dioxide, and heavy calcium powder for 10 minutes to prepare a liquid masterbatch; Preparation of liquid component: Add small particle size styrene acrylic emulsion, nitrile latex, wetting agent, defoaming agent and dispersant into a coating disperser and stir for 5 minutes, then add liquid masterbatch, wetting agent, inorganic color powder and organic color paste while stirring, finally add water and preservative, stir thoroughly for 20 minutes to obtain liquid component; Preparation of coating: Take a liquid component and a powder component in a weight ratio of 1:1, first pour the liquid component, then slowly add the powder component, stir for 3-5 minutes, and prepare the coating.

[0013] Example 3 Weigh the following components by mass: 1t of powder component, including: Cementitious material (PI 52.5 cement) 300kg Slag powder (fineness 1000 mesh) 60kg Circulating fluidized bed boiler ash (unburned carbon content ≤ 1%) 150kg Cellulose ether (HK40000S viscosity is 40000mPa•s) 1kg Starch ether Avibe 301 0.5kg Filler (200 mesh quartz powder) 250kg Anti-panning agent QC1711 3kg Aggregate (70-140 mesh quartz sand) Remainder 1t of liquid component, including: Small particle size pure acrylic emulsion (particle size 50~120nm) 450kg Nitrile latex 200kg Halloysite (particle size 100nm~300nm) 100kg Titanium dioxide TR-996 100kg Heavy calcium powder (800 mesh) 150kg Dispersant 5040 6kg Wetting agent LCN407 3kg Defoamer 6800 5kg Kasong preservative 4kg Inorganic color powder iron oxide yellow 313 8kg Organic color paste lemon yellow paste 8810 1.5kg Water Remaining The coating was prepared according to the following steps: Premixing of powder components: using ultrasonic mixing equipment to premix slag powder, filler, boiler ash, starch ether and anti-efflorescence agent for 10 minutes to prepare a powder masterbatch; Preparation of powder component: Add powder masterbatch, gel material, cellulose ether and aggregate into a dry mortar mixer and stir for 5 minutes to prepare powder component; Premixing of liquid components: using ultrasonic mixing equipment to premix halloysite, titanium dioxide, and heavy calcium powder for 10 minutes to prepare a liquid masterbatch; Preparation of liquid component: Add small particle size styrene acrylic emulsion, nitrile latex, wetting agent, defoaming agent and dispersant into a coating disperser and stir for 5 minutes, then add liquid masterbatch, wetting agent, inorganic color powder and organic color paste while stirring, finally add water and preservative, stir thoroughly for 20 minutes to obtain liquid component; Preparation of coating: Take a liquid component and a powder component in a weight ratio of 1:1, first pour the liquid component, then slowly add the powder component, stir for 3-5 minutes, and prepare the coating.

[0014] Performance Testing Use the Class D Type I method in GB / T 23445-2009 "Polymer Cement Waterproof Coating" to test the tensile strength, elongation at break, bonding strength, impermeability, and impermeability. Use the topcoat method of GB / T 9755-2014 "Synthetic resin emulsion exterior wall coatings" to test indicators such as stain resistance, scrub resistance, alkali resistance, water resistance, and resistance to artificial weathering; Use the method of JG / T 375-2012 "Metal Roof Acrylic High Elastic Waterproof Coating" to test the thermal insulation performance; The flame retardant effect was tested using the method of JC / T 864-2024 "Polymer Emulsion Building Waterproof Coating".

[0015] The test results are shown in Table 1 below. Table 1 Performance indicators and their comparison From the above results, it can be seen that the coating prepared by the present invention has very ideal effects in waterproofing, strength, adhesion, crack resistance, weather resistance, heat insulation and flame retardancy.

[0016] The above is only for explaining the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention without creative work should be included in the protection scope of the present invention.

Claims

1. A decorative waterproof integrated coating for exterior wall renewal, characterized in that: The components of the decorative waterproof integrated coating include: a liquid component and a powder component, and the weight ratio of the liquid component to the powder component is 1:1; In parts by mass, 1000 parts of the powder component include: 200-300 parts of gel material, 40-60 parts of slag powder, 100-150 parts of boiler ash, 0.5-1 part of cellulose ether, 0.3-0.5 part of starch ether, 200-250 parts of filler, 1-3 parts of anti-efflorescence agent and the balance of aggregate; Calculated by weight, 1000 parts of the liquid component include: 400-450 parts of small-particle pure acrylic emulsion, 150-200 parts of nitrile latex, 50-100 parts of halloysite, 50-100 parts of titanium dioxide, 100-150 parts of heavy calcium powder, 4-6 parts of dispersant, 1-3 parts of wetting agent, 3-5 parts of defoaming agent, 2-4 parts of preservative, 6-8 parts of inorganic color powder, 0.5-1.5 parts of organic color paste and the balance of water.

2. The decorative waterproof integrated coating for exterior wall renewal according to claim 1, characterized in that: The gel material is P.I52.5 cement, the fineness of the slag powder is 1000 mesh, the unburned carbon content of the boiler ash is ≤1%, the viscosity of the cellulose ether is 40000 mPa·s, the filler is 200 mesh quartz powder, and the aggregate is 70-140 mesh quartz sand.

3. The decorative waterproof integrated coating for exterior wall renewal according to claim 1, characterized in that: The particle size of the small-particle pure acrylic emulsion is 50-120 mm, the particle size of the halloysite is 100 nm-300 nm, the fineness of the heavy calcium powder is 800 mesh, the dispersant is dispersant 5040, the wetting agent is wetting agent LCN407, the defoamer is defoamer 6800, and the preservative is Kathon preservative.

4. A method for preparing a decorative waterproof integrated coating for exterior wall renewal according to any one of claims 1 to 3, characterized in that: The following steps are involved: Premixing of powder components: using ultrasonic mixing equipment to premix slag powder, filler, boiler ash, starch ether and anti-efflorescence agent for 10 minutes to prepare a powder masterbatch; Preparation of powder component: Add powder masterbatch, gel material, cellulose ether and aggregate into a dry mortar mixer and stir for 5 minutes to prepare powder component; Premixing of liquid components: using ultrasonic mixing equipment to premix halloysite, titanium dioxide, and heavy calcium powder for 10 minutes to prepare a liquid masterbatch; Preparation of liquid component: Add small particle size styrene acrylic emulsion, nitrile latex, wetting agent, defoaming agent and dispersant into a coating disperser and stir for 5 minutes, then add liquid masterbatch, wetting agent, inorganic color powder and organic color paste while stirring, finally add water and preservative, stir thoroughly for 20 minutes to obtain liquid component; Preparation of coating: Take a liquid component and a powder component in a weight ratio of 1:1, first pour the liquid component, then slowly add the powder component, stir for 3-5 minutes, and prepare the coating.

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