Alkali-resistant real stone paint and preparation method thereof

Abstract

The invention relates to alkali-resistant real stone paint and a preparation method thereof, and belongs to the technical field of paint. The alkali-resistant real stone paint is prepared from the following raw materials in parts by weight: 90 to 100 parts of water, 1 to 2 parts of hydroxyethyl cellulose, 2 to 3 parts of preservative, 100 to 120 parts of silicone acrylic emulsion, 8 to 9 parts of film-forming agent, 0.1 to 0.2 part of defoaming agent, 1 to 1.2 parts of thickening agent, 8 to 9 parts of tetramethyl orthosilicate, 7 to 10 parts of cyclosiloxane, 30 to 60 parts of nano silica sol and 40 to 70 parts of acrylic emulsion. The nano silica sol and the acrylic emulsion permeate a substrate, react with internal groups and neutralize with alkaline substances, meanwhile, the adhesive force of a coating film and the substrate is increased, mortar capillary pores are blocked, then precipitation of alkali and salt is prevented, cyclosiloxane is hydrolyzed in an acid environment and reacts with tetramethyl orthosilicate, and the coating film is formed. The adhesive force of a coating film is further improved, so that the alkali-resistant sealing capability is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coatings, and in particular to an alkali-resistant real stone paint and a preparation method thereof. Background Art

[0002] In my country, paints such as mud, whitewash and wall paint have been used to decorate buildings for a long time. In the 1950s, people used lime slurry, cosai silver and other materials to decorate the interior and exterior walls of buildings. In the 1970s, 106 interior wall paint with polyvinyl alcohol and water glass as the main raw materials was successfully developed in Shanghai, creating a precedent for the application of polymer synthetic resin architectural paints. Since then, 106 glue and 107 glue have been used in the decoration of interior and exterior walls and floors of buildings for more than 20 years. After that, synthetic resin water-based emulsions represented by acrylic acid series were successfully developed in my country, and architectural paints prepared with this emulsion were widely used in the decoration of interior and exterior walls of buildings in the 1980s and 1990s.

[0003] Real stone paint is a kind of paint with decorative effect similar to marble and granite. It is mainly made of natural stone powder of various colors, including natural colored sand, emulsion and additives. Natural real stone paint is made of natural granite, crushed stone and stone powder of different particle sizes as the main materials, synthetic resin or synthetic resin emulsion as the main binder, and supplemented with a variety of additives. It has the advantages of high simulation, fireproof, waterproof and weather-resistant. It not only has the decorative effect of natural stone, but also has the characteristics of no color penetration, uniform color and strong three-dimensional sense. Natural real stone paint is environmentally friendly, non-toxic, has good stain resistance, long service life, and can effectively prevent the damage of buildings by the harsh external environment. Many high-end residences, courtyards and even high-rise buildings have proposed to apply real stone paint that is very similar to the appearance of natural stones such as natural granite and marble, and the performance requirements are strong adhesion and alkali resistance.

[0004] The film-forming mechanism of real stone paint is the same as that of ordinary latex paint. It needs to go through a process in which dispersed pigment particles and polymer particles combine with each other to form a whole. The latex particles remain dispersed in the latex paint due to the double electric layer and shielding stabilization. During the paint construction process, they are close to each other due to the volatilization of water and reach a dense filling state. When approaching a certain degree, the protective layer adsorbed on the surface of the high polymer particles is destroyed, and the exposed particles are tightly squeezed together until they reach the general size of the capillary diameter. The dispersion and stability repulsion of the polymer particles cannot withstand the capillary pressure, the particles are deformed, and the molecular chains of the polymer interface diffuse, penetrate and entangle with each other, so that the coating performance is further improved, forming a continuous film with certain performance. In addition to the slow volatilization of water at this stage, there is also the volatilization of film-forming aids. The film-forming aid is volatilization-controlled at the beginning of this stage, followed by diffusion control. When the ambient environment and the base temperature begin to be higher than the minimum film-forming temperature of the latex paint, the water in the latex system evaporates and dries to form a film. The coating film is composed of solid polymers, pigments and fillers, some residual special additives and gases to form a multiphase system.

[0005] At present, Chinese patent CN 110724456 B discloses a high-strength, alkali-resistant, same-color primer real stone paint and its preparation method. The invention includes the following raw materials in parts by weight: 180 parts of water; 0.5-3 parts of hydroxyethyl cellulose; 18-35 parts of HYM-21 rubber powder; 4-16 parts of propylene glycol; 0.5-3.6 parts of wetting agent; 3.6-8.4 parts of dispersant; 1-3 parts of defoaming agent; 1-3 parts of multifunctional additives; 40-150 parts of titanium dioxide; 60-180 parts of other fillers; 60-240 parts of 120-mesh quartz sand; 10-30 parts of film-forming additives; 1-3 parts of kason preservatives; 300-520 parts of emulsion; 0.2-3.8 parts of penetrant; 0.4-4 parts of alkali swelling thickener, by using 1,3-divinyl-1,1,3 ,3-Tetramethyldisiloxane hydrolyzes in an acidic environment and reacts with methyl orthosilicate, which can improve the adhesion of the primer and the strength of the paint film to achieve alkali-resistant sealing ability. However, the chain structure of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane is not very stable, which also affects the adhesion. Summary of the invention

[0006] To this end, the present invention provides an alkali-resistant real stone paint and a preparation method thereof to solve the above-mentioned problems in the prior art.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: According to a first aspect of the present invention, an alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, a preservative, a silicone-acrylic emulsion, a film-forming agent, a defoaming agent, a thickener, methyl orthosilicate, cyclosiloxane, nano-silica sol, and acrylic emulsion.

[0008] Furthermore, the weight proportions of the cyclosiloxane, nano-silica sol and acrylic emulsion are 7-10 parts, 30-60 parts and 40-70 parts respectively.

[0009] Furthermore, the cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:1.

[0010] Furthermore, the alkali-resistant real stone paint includes the following raw materials in parts by weight: 90-100 parts of water, 1-2 parts of hydroxyethyl cellulose, 2-3 parts of preservatives, 100-120 parts of silicone-acrylic emulsion, 8-9 parts of film-forming agent, 0.1-0.2 parts of defoaming agent, 1-1.2 parts of thickener, and 8-9 parts of methyl orthosilicate.

[0011] Furthermore, the preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0012] Furthermore, the stirring speed and time in step (1) are 300-500 r / min and 30-40 min respectively.

[0013] Furthermore, in step (2), increasing the speed refers to increasing it to 800-1200 r / min, and the time for increasing the speed is 10-15 min, and reducing the speed refers to reducing it to 200-300 r / min, and the time for reducing the speed is 20-30 min.

[0014] Furthermore, the thickener is composed of bentonite and attapulgite in a mass ratio of 1:1.

[0015] Compared with the existing technology, this solution has the following advantages: Nano-silica sol and acrylic emulsion penetrate the substrate and react with the internal groups, neutralize with alkaline substances, and increase the adhesion of the coating to the substrate, while blocking the pores of the mortar, thereby preventing the precipitation of alkali and salt. The cyclosiloxane is hydrolyzed in an acidic environment and reacts with methyl orthosilicate to further improve the adhesion of the coating to achieve anti-alkali sealing ability. When the coating has good adhesion to the substrate, a dense coating is formed on the surface of the mortar to prevent the migration of alkali and salt, and hinder the contact between alkali and air. Therefore, the cyclosiloxane, nano-silica sol and acrylic emulsion work together to enhance the anti-alkali effect; in addition, the cyclosiloxane composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane forms a stable ring structure with methyl orthosilicate, thereby improving the anti-alkali performance. DETAILED DESCRIPTION

[0016] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Embodiment 1 The invention discloses an alkali-resistant real stone paint, which comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoamer, thickener, methyl orthosilicate, cyclosiloxane, nano silica sol and acrylic emulsion.

[0018] The weight parts of the cyclosiloxane, nano silica sol and acrylic emulsion are 7 parts, 30 parts and 40 parts respectively.

[0019] The cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:1.

[0020] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 90 parts of water, 1 part of hydroxyethyl cellulose, 2 parts of preservatives, 100 parts of silicone-acrylic emulsion, 8 parts of film-forming agent, 0.1 part of defoaming agent, 1 part of thickener, and 8 parts of methyl orthosilicate.

[0021] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0022] The stirring speed and time in step (1) are 300 r / min and 30 min respectively.

[0023] In the step (2), increasing the speed refers to increasing it to 800 r / min, and the time for increasing the speed is 10 minutes. Decreasing the speed refers to decreasing it to 200 r / min, and the time for decreasing the speed is 20 minutes.

[0024] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0025] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0026] Embodiment 2 The invention discloses an alkali-resistant real stone paint, which comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoamer, thickener, methyl orthosilicate, cyclosiloxane, nano silica sol and acrylic emulsion.

[0027] The weight parts of the cyclosiloxane, nano silica sol and acrylic emulsion are 8.5 parts, 45 parts and 55 parts respectively.

[0028] The cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:1.

[0029] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 95 parts of water, 1.5 parts of hydroxyethyl cellulose, 2.5 parts of preservatives, 110 parts of silicone-acrylic emulsion, 8.5 parts of film-forming agent, 0.1 part of defoaming agent, 1.1 parts of thickener, and 8.5 parts of methyl orthosilicate.

[0030] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0031] The stirring speed and time in step (1) are 400 r / min and 35 min respectively.

[0032] In the step (2), increasing the speed refers to increasing it to 1000 r / min, and the time for increasing the speed is 12 minutes. Decreasing the speed refers to decreasing it to 250 r / min, and the time for decreasing the speed is 25 minutes.

[0033] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0034] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0035] Embodiment 3 The invention discloses an alkali-resistant real stone paint, which comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoamer, thickener, methyl orthosilicate, cyclosiloxane, nano silica sol and acrylic emulsion.

[0036] The weight parts of the cyclosiloxane, nano silica sol and acrylic emulsion are 10 parts, 60 parts and 70 parts respectively.

[0037] The cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:1.

[0038] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 100 parts of water, 2 parts of hydroxyethyl cellulose, 3 parts of preservatives, 120 parts of silicone-acrylic emulsion, 9 parts of film-forming agent, 0.2 parts of defoaming agent, 1.2 parts of thickener, and 9 parts of methyl orthosilicate.

[0039] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0040] The stirring speed and time in step (1) are 500 r / min and 40 min respectively.

[0041] In the step (2), increasing the speed refers to increasing it to 1200 r / min, and the time for increasing the speed is 15 minutes. Reducing the speed refers to reducing it to 300 r / min, and the time for reducing the speed is 30 minutes.

[0042] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0043] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0044] Comparative Example 1 On the basis of the second embodiment, an alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoaming agent, thickener, methyl orthosilicate, nano-silica sol, and acrylic emulsion.

[0045] The weight portions of the nano-silica sol and acrylic emulsion are 53.5 parts and 55 parts respectively.

[0046] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 95 parts of water, 1.5 parts of hydroxyethyl cellulose, 2.5 parts of preservatives, 110 parts of silicone-acrylic emulsion, 8.5 parts of film-forming agent, 0.1 part of defoaming agent, 1.1 parts of thickener, and 8.5 parts of methyl orthosilicate.

[0047] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0048] The stirring speed and time in step (1) are 400 r / min and 35 min respectively.

[0049] In the step (2), increasing the speed refers to increasing it to 1000 r / min, and the time for increasing the speed is 12 minutes. Decreasing the speed refers to decreasing it to 250 r / min, and the time for decreasing the speed is 25 minutes.

[0050] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0051] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0052] Comparative Example 2 On the basis of the second embodiment, an alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoaming agent, thickener, methyl orthosilicate, cyclosiloxane, and acrylic emulsion.

[0053] The weight parts of the cyclosiloxane and the acrylic emulsion are 53.5 parts and 55 parts respectively.

[0054] The cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:1.

[0055] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 95 parts of water, 1.5 parts of hydroxyethyl cellulose, 2.5 parts of preservatives, 110 parts of silicone-acrylic emulsion, 8.5 parts of film-forming agent, 0.1 part of defoaming agent, 1.1 parts of thickener, and 8.5 parts of methyl orthosilicate.

[0056] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0057] The stirring speed and time in step (1) are 400 r / min and 35 min respectively.

[0058] In the step (2), increasing the speed refers to increasing it to 1000 r / min, and the time for increasing the speed is 12 minutes. Decreasing the speed refers to decreasing it to 250 r / min, and the time for decreasing the speed is 25 minutes.

[0059] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0060] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0061] Comparative Example 3 On the basis of the second embodiment, an alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoaming agent, thickener, methyl orthosilicate, cyclosiloxane, and nano-silica sol.

[0062] The weight portions of the cyclosiloxane and the nano-silica sol are 8.5 parts and 100 parts respectively.

[0063] The cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:1.

[0064] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 95 parts of water, 1.5 parts of hydroxyethyl cellulose, 2.5 parts of preservatives, 110 parts of silicone-acrylic emulsion, 8.5 parts of film-forming agent, 0.1 part of defoaming agent, 1.1 parts of thickener, and 8.5 parts of methyl orthosilicate.

[0065] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0066] The stirring speed and time in step (1) are 400 r / min and 35 min respectively.

[0067] In the step (2), increasing the speed refers to increasing it to 1000 r / min, and the time for increasing the speed is 12 minutes. Decreasing the speed refers to decreasing it to 250 r / min, and the time for decreasing the speed is 25 minutes.

[0068] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0069] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0070] Comparative Example 4 On the basis of Example 2, an alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoaming agent, thickener, methyl orthosilicate, cyclosiloxane, nano-silica sol, and acrylic emulsion.

[0071] The weight parts of the cyclosiloxane, nano silica sol and acrylic emulsion are 8.5 parts, 45 parts and 55 parts respectively.

[0072] The cyclosiloxane is hexamethylcyclotrisiloxane.

[0073] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 95 parts of water, 1.5 parts of hydroxyethyl cellulose, 2.5 parts of preservatives, 110 parts of silicone-acrylic emulsion, 8.5 parts of film-forming agent, 0.1 part of defoaming agent, 1.1 parts of thickener, and 8.5 parts of methyl orthosilicate.

[0074] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0075] The stirring speed and time in step (1) are 400 r / min and 35 min respectively.

[0076] In the step (2), increasing the speed refers to increasing it to 1000 r / min, and the time for increasing the speed is 12 minutes. Decreasing the speed refers to decreasing it to 250 r / min, and the time for decreasing the speed is 25 minutes.

[0077] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0078] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0079] Comparative Example 5 On the basis of Example 2, an alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoaming agent, thickener, methyl orthosilicate, cyclosiloxane, nano-silica sol, and acrylic emulsion.

[0080] The weight parts of the cyclosiloxane, nano silica sol and acrylic emulsion are 8.5 parts, 45 parts and 55 parts respectively.

[0081] The cyclosiloxane is octamethylcyclotetrasiloxane.

[0082] The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 95 parts of water, 1.5 parts of hydroxyethyl cellulose, 2.5 parts of preservatives, 110 parts of silicone-acrylic emulsion, 8.5 parts of film-forming agent, 0.1 part of defoaming agent, 1.1 parts of thickener, and 8.5 parts of methyl orthosilicate.

[0083] The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

[0084] The stirring speed and time in step (1) are 400 r / min and 35 min respectively.

[0085] In the step (2), increasing the speed refers to increasing it to 1000 r / min, and the time for increasing the speed is 12 minutes. Decreasing the speed refers to decreasing it to 250 r / min, and the time for decreasing the speed is 25 minutes.

[0086] The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

[0087] The preservative was purchased from Qifei, the silicone-acrylic emulsion was purchased from Xinleina, the film-forming agent was purchased from Eastman / 25265-77-4, the defoaming agent was purchased from Hengxin, the thickener was purchased from Qifei, the bentonite was purchased from Yuexin, and the attapulgite was purchased from Baiyi.

[0088] 1. Performance Testing The alkali-resistant real stone paints prepared in Examples 1 to 3 and Comparative Examples 1 to 5 were used as samples, and the alkali resistance and adhesion were tested respectively according to (JG / T210-2018). The test results are shown in Table 1.

[0089] Table 1 From the data in Table 1, it is found that the alkali resistance of the embodiment is normal and has no color change for more than 200h, while the alkali resistance time of the comparative example is less than that of the embodiment and has more than color change. The peel strength of the embodiment is greater than that of the comparative example, and the peel strength of the comparative example 1 is the smallest. In comparative examples 1 to 3, one of the cyclosiloxane, nano-silica sol, and acrylic emulsion is removed, and its alkali resistance and peel strength are both deteriorated. The alkali resistance and peel strength of the single cyclosiloxane in comparative examples 4 to 5 are also worse than those of the embodiment. Nano-silica sol and acrylic emulsion penetrate the substrate and react with the internal groups, neutralize with alkaline substances, and increase the adhesion of the coating to the substrate, while blocking the mortar pores, thereby preventing the precipitation of alkali and salt. The cyclosiloxane is hydrolyzed in an acidic environment and reacts with methyl orthosilicate to further improve the adhesion of the coating to achieve anti-alkali sealing ability. The coating has good adhesion to the substrate, and a dense coating is formed on the mortar surface to prevent the migration of alkali and salt, and hinder the contact between alkali and air. Therefore, the cyclosiloxane, nano-silica sol and acrylic emulsion work together to enhance the alkali resistance; in addition, the cyclosiloxane composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane forms a stable ring structure with methyl orthosilicate, thereby improving the alkali resistance.

[0090] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the disclosure disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure.

Claims

1. An alkali-resistant real stone paint, characterized in that: The alkali-resistant real stone paint comprises the following raw materials: water, hydroxyethyl cellulose, preservative, silicone-acrylic emulsion, film-forming agent, defoaming agent, thickener, methyl orthosilicate, cyclosiloxane, nano-silica sol, and acrylic emulsion; the weight proportions of the cyclosiloxane, nano-silica sol, and acrylic emulsion are 7-10 parts, 30-60 parts, and 40-70 parts, respectively.

2. The alkali-resistant real stone paint according to claim 1, characterized in that: The cyclosiloxane is composed of hexamethylcyclotrisiloxane and octamethylcyclotetrasiloxane in a mass ratio of 1:

1.

3. The alkali-resistant real stone paint according to claim 1, characterized in that: The alkali-resistant real stone paint comprises the following raw materials in parts by weight: 90-100 parts of water, 1-2 parts of hydroxyethyl cellulose, 2-3 parts of preservatives, 100-120 parts of silicone-acrylic emulsion, 8-9 parts of film-forming agent, 0.1-0.2 parts of defoaming agent, 1-1.2 parts of thickener, and 8-9 parts of methyl orthosilicate.

4. The alkali-resistant real stone paint according to claim 1, characterized in that: The preparation method of the alkali-resistant real stone paint comprises the following steps: (1) Put water, hydroxyethyl cellulose, defoaming agent and silicone-acrylic emulsion into a stirring container and stir; (2) Then increase the speed and continue stirring, then reduce the speed and add the remaining other raw material components, and then obtain the alkali-resistant real stone paint after stirring.

5. The alkali-resistant real stone paint according to claim 4, characterized in that: The stirring speed and time in step (1) are 300-500 r / min and 30-40 min respectively.

6. The alkali-resistant real stone paint according to claim 4, characterized in that: In the step (2), increasing the speed refers to increasing it to 800-1200 r / min, and the time for increasing the speed is 10-15 min. Reducing the speed refers to reducing it to 200-300 r / min, and the time for reducing the speed is 20-30 min.

7. The alkali-resistant real stone paint according to claim 1, characterized in that: The thickener consists of bentonite and attapulgite in a mass ratio of 1:1.

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