Hydrophobic nano silicon-calcium polymerization reinforced inorganic putty coating

Abstract

The invention relates to an inorganic putty coating capable of improving performance by utilizing a nanotechnology and polymerization modification, which is characterized in that a high-strength and low-permeability structural foundation is realized by selecting a basic cementing material, a framework filler and an active enhancing component, and the coating is prepared by mixing in stages, so that the components are uniformly dispersed, and the final strength and binding power are improved; the active reaction components promote the gelling process, a compact gel network is formed, and the risk of migration of alkaline substances is reduced; and meanwhile, the hydrophobic nano material constructs a waterproof layer on the surface and in pores, so that moisture invasion is remarkably reduced, and the stain resistance and durability are improved. The polymer modifier and the rheology modifier ensure flexibility and construction convenience and avoid cracking and sagging phenomena, the functional additive further optimizes bubble control and dispersion efficiency, the overall performance is balanced, and the coating is suitable for indoor and outdoor wall decoration and provides an environment-friendly and high-performance solution.

Description

Technical Field

[0001] This invention relates to the field of architectural coatings technology, specifically to a hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating. Background Technology

[0002] Inorganic putty coatings are widely used in building decoration, but they often suffer from high water absorption and insufficient resistance to efflorescence. These defects stem from the easy migration of free alkaline substances produced during the hydration of cementitious materials, as well as excessive pores in the material structure leading to water penetration. Traditional formulations rely on simple filler and cementitious combinations, which cannot effectively fill microscopic pores, resulting in uneven strength and easy cracking. Weak mildew resistance further limits its use in humid environments, affecting overall durability. While attempts to improve the situation include adding organic additives, these often introduce poor compatibility or environmental hazards, failing to achieve a comprehensive balance of performance.

[0003] To overcome these limitations, it is necessary to integrate nanoscale modification and polymerization enhancement technologies. Through the synergistic effect of active minerals and nanoparticles, a denser gel network is formed, reducing the penetration path. The introduction of hydrophobic components can construct a surface water-repellent layer, reducing water absorption and stain adhesion. Rheological regulation ensures material stability during construction, avoiding incomplete hydration due to insufficient water retention. At the same time, antibacterial components provide long-term protection, expanding the application range. This comprehensive approach aims to achieve highly environmentally friendly and high-performance inorganic putty coatings, adapting to diverse indoor and outdoor decorative needs. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the prior art, the inventors have proposed the present invention.

[0006] Therefore, the purpose of this invention is to overcome the shortcomings of the prior art and provide a hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating, composed of the following components by weight percentage: white cement 20-40%, quartz sand powder 40-60%, composite high-activity kaolin 2-20%, composite nano-calcium 0.1-10%, nano-zinc 0.1-2%, redispersible latex powder 2-10%, hydroxypropyl methylcellulose 0.2-0.6%, thixotropic lubricant 0.001%-0.1%, organosilicon defoamer 0.1%-0.9%, polycarboxylate superplasticizer 0.3%, and hydrophobic nano-silica 1%-3%.

[0008] As a preferred embodiment of the hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating of the present invention, the white cement is PW 42.5 grade white cement, which serves as the main cementing material and provides the basis for final strength and adhesion.

[0009] As a preferred embodiment of the hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating of the present invention, the quartz sand powder has a particle size of 40-70 mesh and 120-325 mesh, which serves as a skeleton filler to provide volume stability, reduce shrinkage, and improve wear resistance.

[0010] As a preferred embodiment of the hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating of the present invention, the composite high-activity kaolin has high pozzolanic activity and reacts with cement hydration products to generate hydrated calcium silicate gel, thereby improving strength, density and reducing permeability.

[0011] As a preferred embodiment of the hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating of the present invention, the composite nano-calcium, as a highly efficient alkali-resistant component, consumes calcium hydroxide, reduces the alkalinity of the liquid phase, fills micropores, and improves density and early strength.

[0012] As a preferred embodiment of the hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating of the present invention, nano-zinc provides broad-spectrum antibacterial and antifungal properties and enhances dispersion through surface effects.

[0013] As a preferred embodiment of the hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating of the present invention, the redispersible latex powder serves as the core organic modifier, improving flexibility and resistance to deformation, and enhancing workability.

[0014] In a preferred embodiment of the hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating of the present invention, hydroxypropyl methylcellulose serves as a water-retaining and thickening agent to prevent excessive moisture loss, ensure cement hydration, and improve strength and adhesion.

[0015] As a preferred embodiment of the hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating of the present invention, wherein: a thixotropic lubricant provides thixotropy, improves anti-sagging properties and reduces extrusion resistance; an organosilicon defoamer eliminates bubbles, improves density and surface smoothness; and a polycarboxylate superplasticizer disperses cement particles, reduces water demand, and improves strength and density.

[0016] As a preferred embodiment of the hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating of the present invention, the hydrophobic nano-silica forms a hydrophobic layer, reduces water absorption, improves water resistance and stain resistance, and fills micropores to enhance strength.

[0017] The beneficial effects of this invention are as follows: This coating, reinforced by nano-silicon-calcium polymerization, significantly reduces water absorption, forming a hydrophobic surface layer that blocks moisture intrusion, enhancing waterproofing and freeze-thaw resistance. The synergistic effect of skeleton filling and active reaction constructs a dense structure, reducing shrinkage and cracking, and improving mechanical strength and durability. Alkali-resistant components rapidly neutralize alkaline substances, providing multi-layer protection against efflorescence and maintaining a beautiful surface. Antibacterial components inhibit mold growth, making it suitable for humid environments and extending service life. The overall inorganic composition reduces harmful volatilization, meeting sustainability requirements. Polymer modification imparts flexibility, adapting to substrate deformation and preventing peeling. Rheology adjustment improves construction, ensuring complete hydration through adequate water retention. Thixotropic properties prevent sagging, facilitating vertical application. Functional additives optimize dispersion and defoaming, improving density and smoothness. Nano-fillers also provide insulation, reducing heat conduction and enhancing energy efficiency. This solution comprehensively improves performance, expands indoor and outdoor applications, and provides a reliable decorative solution. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the examples in the specification.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0021] Example 1

[0022] This embodiment provides a hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating.

[0023] Specifically, the coating comprises the following components by weight percentage: 25% white cement, 50% quartz sand powder, 10% composite high-activity kaolin, 5% composite nano-calcium, 1% nano-zinc, 5% redispersible latex powder, 0.4% hydroxypropyl methylcellulose, 0.05% thixotropic lubricant, 0.5% silicone defoamer, 0.3% polycarboxylate superplasticizer, and 3% hydrophobic nano-silica.

[0024] Furthermore, the preparation process employs staged mixing to promote uniform dispersion.

[0025] First, add 25 kg of white cement and 50 kg of quartz sand powder to the mixing equipment and mix at low speed for about 5 minutes to form a preliminary uniform mixture.

[0026] White cement, as a cementing material, lays the foundation for strength, while quartz sand powder, with its gradation and particle size, provides skeletal support, enhancing volume stability and wear resistance.

[0027] Preferably, 10 kg of composite high-activity kaolin, 5 kg of composite nano-calcium, and 1 kg of nano-zinc are added next, and the mixture is stirred at medium speed for about 10 minutes.

[0028] These active components react with the gel products through high volcanic ash activity to form a gel network, which increases density and reduces the penetration path. The composite nano-calcium further consumes alkaline substances, fills micropores, and promotes early strength development; the nano-zinc is evenly dispersed and provides antibacterial protection.

[0029] As a further step, add 5 kg of redispersible latex powder and continue stirring for about 8 minutes. After the polymer component forms a film, it enhances flexibility, improves resistance to deformation, and provides a lubricating effect, making it easier to carry out construction.

[0030] Specifically, 0.4 kg of hydroxypropyl methylcellulose was then introduced and stirred for about 5 minutes. This component plays a water-retaining role, preventing rapid water loss and ensuring sufficient gelation. At the same time, it thickens the mixture and inhibits sagging.

[0031] Preferably, 0.05 kg of thixotropic lubricant, 0.5 kg of silicone defoamer, and 0.3 kg of polycarboxylate superplasticizer are added, and the mixture is stirred at high speed for about 15 minutes. The thixotropic lubricant imparts the property of thinning during stirring and thickening upon standing, optimizing anti-sagging and extrusion performance; the silicone defoamer removes air bubbles, improving final density and surface quality; and the polycarboxylate superplasticizer disperses particles, reducing water consumption, increasing strength, and reducing shrinkage.

[0032] Finally, add 3 kg of hydrophobic nano-silica and continue stirring for about 10 minutes until completely homogeneous. This nanomaterial forms a hydrophobic layer in the pores, significantly reducing water absorption and enhancing overall strength through filling.

[0033] The entire process is completed at room temperature, with the total mixing time controlled within a reasonable range. The resulting powdered coating is mixed with an appropriate amount of water to form a paste before application to the wall. This method ensures synergistic action of all components, resulting in high-performance characteristics.

[0034] Example 2

[0035] This embodiment provides a hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating.

[0036] Specifically, the coating comprises the following components by weight percentage: 30% white cement, 45% quartz sand powder, 15% composite high-activity kaolin, 3% composite nano-calcium, 0.5% nano-zinc, 4% redispersible latex powder, 0.3% hydroxypropyl methylcellulose, 0.01% thixotropic lubricant, 0.3% silicone defoamer, 0.3% polycarboxylate superplasticizer, and 1.5% hydrophobic nano-silica.

[0037] Furthermore, the preparation process is carried out in stages to optimize dispersion.

[0038] First, place 30 kg of white cement and 45 kg of quartz sand powder into a mixing device and mix at low speed for about 6 minutes to obtain a uniform basic mixture. The white cement provides the cementitious base, while the gradation design of the quartz sand powder ensures the skeleton filling, reduces shrinkage, and improves wear resistance.

[0039] Preferably, 15 kg of composite highly active kaolin, 3 kg of composite nano-calcium, and 0.5 kg of nano-zinc are then added, and the mixture is stirred at medium speed for about 12 minutes. The highly active kaolin promotes gel formation, improves density and impermeability; the composite nano-calcium neutralizes alkalinity and fills pores to enhance early performance; and the nano-zinc achieves antibacterial dispersion through surface effects.

[0040] As a further step, 4 kg of redispersible latex powder was introduced and stirred for approximately 7 minutes. This component modifies the organic phase, improving flexibility and crack resistance, while also enhancing lubricity.

[0041] Specifically, add 0.3 kg of hydroxypropyl methylcellulose and continue stirring for about 4 minutes. This material retains water to ensure complete hydration and thickens to prevent sagging during application.

[0042] Preferably, 0.01 kg of thixotropic lubricant, 0.3 kg of silicone defoamer, and 0.3 kg of polycarboxylate superplasticizer are added, and the mixture is stirred at high speed for about 12 minutes. The thixotropic lubricant optimizes the rheological behavior; the defoamer eliminates pore defects; and the superplasticizer reduces the water-cement ratio and improves the strength.

[0043] Finally, add 1.5 kg of hydrophobic nano-silica and stir for about 8 minutes until homogeneous. This component constructs a hydrophobic network, which is waterproof and stain-resistant, and fills the microstructure.

[0044] The process is carried out at room temperature, with a moderate total time. The powdered product is mixed with water before use and is suitable for high humidity environments.

[0045] Example 3

[0046] This embodiment provides a hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating.

[0047] As another embodiment, a formulation and preparation method for a hydrophobic nano-silica-calcium polymer-reinforced inorganic putty coating are provided. Specifically, the coating comprises the following components by weight percentage: 35% white cement, 40% quartz sand powder, 5% composite high-activity kaolin, 8% composite nano-calcium, 1.5% nano-zinc, 8% redispersible latex powder, 0.5% hydroxypropyl methylcellulose, 0.08% thixotropic lubricant, 0.7% silicone defoamer, 0.3% polycarboxylate superplasticizer, and 2% hydrophobic nano-silica.

[0048] Furthermore, the preparation employs a staged mixing process.

[0049] First, mix 35 kg of white cement and 40 kg of quartz sand powder at low speed for about 7 minutes to form a stable base. The cementitious material works synergistically with the filling skeleton to provide strength support.

[0050] Preferably, 5 kg of composite high-activity kaolin, 8 kg of composite nano-calcium, and 1.5 kg of nano-zinc are added, and the mixture is stirred at medium speed for about 15 minutes. These active ingredients react to form a gel, with the composite nano-calcium providing enhanced alkali resistance and the nano-zinc enhancing antibacterial properties.

[0051] As a further step, add 8 kg of redispersible latex powder and stir for about 10 minutes to polymerize and modify it, thereby improving its flexibility and ease of application.

[0052] Specifically, 0.5 kg of hydroxypropyl methylcellulose is introduced and stirred for about 6 minutes. This process helps retain water and thicken the mixture to ensure uniform hydration.

[0053] Preferably, 0.08 kg of thixotropic lubricant, 0.7 kg of silicone defoamer, and 0.3 kg of polycarboxylate superplasticizer are added, and the mixture is stirred at high speed for about 18 minutes. This optimizes thixotropy, defoaming, and dispersion.

[0054] Finally, add 2 kg of hydrophobic nano-silica and stir for about 12 minutes until homogeneous. This enhances hydrophobicity and strength.

[0055] The room temperature process is controlled reasonably in terms of total time. Suitable for exterior wall decoration.

[0056] In the above embodiments, comprehensive performance optimization is achieved through nano-silicon-calcium polymerization enhancement. The basic cementitious and skeletal components establish structural stability, the reactive components promote the formation of a chemical network, polymerization modification imparts elasticity, rheological adjustment ensures operability, and hydrophobic reinforcement constructs a protective layer. This synergistic mechanism stems from the interaction between components: highly active kaolin reacts with calcium to form a gel, filling pores and reducing permeability; nano-zinc surface activity inhibits microorganisms; and the hydrophobic silica layer repels water and reduces interfacial tension. Staged mixing avoids aggregation, promotes uniform distribution, and improves overall density.

[0057] Further analysis reveals that Example 1 emphasizes a high hydrophobic ratio, making it suitable for scenarios with strong waterproofing requirements. It utilizes nano-silicon filling to enhance insulation and reduce thermal bridging. Example 2 balances the active kaolin, improving the densification process. The principle lies in the fact that volcanic ash activity accelerates hydration and reduces alkali migration. Example 3 adds nano-calcium and polymers to strengthen alkali resistance and flexibility, based on the neutralization mechanism of consuming calcium hydroxide and film elasticity.

[0058] This coating utilizes nanoscale effects to amplify component functions: particles fill microscopic voids, surface modification improves compatibility, and polymerization bridging enhances toughness. Compared to traditional coatings, reduced shrinkage stems from a low water-cement ratio and a dense network; antibacterial properties arise from zinc ion release inhibiting enzyme activity. Environmental friendliness comes from its inorganic dominance, reducing organic volatiles. Convenient application is achieved through thixotropy and water retention, resulting in dynamic equilibrium; it thickens upon standing to prevent sagging, and flows easily upon stirring. Energy efficiency is achieved through nanoscale heat insulation, scattering heat radiation.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating, characterized in that: It is composed of the following components by weight percentage: white cement 20-40%, quartz sand powder 40-60%, composite high-activity kaolin 2-20%, composite nano-calcium 0.1-10%, nano-zinc 0.1-2%, redispersible latex powder 2-10%, hydroxypropyl methylcellulose 0.2-0.6%, thixotropic lubricant 0.001%-0.1%, organosilicon defoamer 0.1%-0.9%, polycarboxylate superplasticizer 0.3%, and hydrophobic nano-silica 1%-3%.

2. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: The white cement is PW 42.5 grade white cement, which serves as the primary cementing material, providing the foundation for final strength and bond strength.

3. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Quartz sand powder with particle sizes of 40-70 mesh and 120-325 mesh is used as a skeleton filler to provide volume stability, reduce shrinkage, and improve wear resistance.

4. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Composite high-activity kaolin has high pozzolanic activity and reacts with cement hydration products to form hydrated calcium silicate gel, which improves strength, density and reduces permeability.

5. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Composite nano-calcium, as a highly efficient alkali-resistant component, consumes calcium hydroxide, reduces the alkalinity of the liquid phase, fills micropores, and improves density and early strength.

6. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Nano zinc provides broad-spectrum antibacterial and antifungal properties, and enhances dispersion through surface effects.

7. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Redispersible latex powder serves as the core organic modifier, enhancing flexibility and resistance to deformation, and improving workability.

8. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Hydroxypropyl methylcellulose acts as a water-retaining and thickening agent, preventing excessive moisture loss, ensuring cement hydration, and improving strength and adhesion.

9. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Thixotropic lubricants provide thixotropy, improving anti-sagging and reducing extrusion resistance; silicone defoamers eliminate bubbles, improving density and surface smoothness; polycarboxylate superplasticizers disperse cement particles, reducing water demand and improving strength and density.

10. The hydrophobic nano-silicon-calcium polymer-reinforced inorganic putty coating as described in claim 1, characterized in that: Hydrophobic nano-silica forms a hydrophobic layer, reducing water absorption, improving water resistance and stain resistance, and filling micropores to enhance strength.