CN115895307A - Sand-wall-shaped pure-color-texture natural stone coating and preparation method thereof - Google Patents

Abstract

The application discloses a sand-wall-shaped pure-color-texture natural stone coating and a preparation method thereof. The coating comprises the following raw materials in parts by weight: 23-26 parts of silicone-acrylic emulsion, 10-15 parts of inorganic silicone resin, 30-40 parts of water, 1-3 parts of cellulose, 0.2-0.4 part of polyamide wax slurry, 0.1-0.3 part of polyvinyl alcohol, 100-120 parts of inorganic calcined colored sand, 4-5 parts of lithium chloride, 32-36 parts of dimethylacetamide, 0.8-1.5 parts of film-forming assistant, 0.6-0.8 part of bactericide and 0.02-0.05 part of defoaming agent. The sand-wall-shaped pure-color-texture natural stone coating has excellent stability, is formed by one-time spraying, is low in coating weight, good in film distinctness of image, high in permeability, good in freezing and thawing cycle resistance of a coating, excellent in weather resistance, good in stain resistance, good in chemical resistance, free of high and low temperature color difference, free of color difference among batches, free of flowering, stain and rain marks and color difference of a shade surface and a sun surface.

Description

Sand-wall-shaped pure-color-texture natural stone coating and preparation method thereof

Technical Field

The application relates to the technical field of coatings, in particular to a sand-wall-shaped pure-color-texture natural stone coating and a preparation method thereof.

Background

Architectural coatings are classified into homogeneous plane coatings and heterogeneous texture coatings according to the decorative function. Homogeneous flat coatings are coatings whose coating surfaces exhibit a flat and color-uniform decorative effect, i.e. flat coatings, such as emulsion paints, polyurethane coatings, fluorocarbon coatings, etc. The heterogeneous texture coating is a coating with heterogeneous pigment and three-dimensional texture, such as sand wall-shaped, water-based colorful and real stone paint. Among them, homogeneous flat coatings are currently limited in architectural coating applications due to their poor weatherability, stain resistance, and the like.

Among heterogeneous texture coatings, the real stone paint is more and more widely used in exterior wall decoration because the decoration effect of the real stone paint is similar to that of marble and granite. The stone-like paint is prepared by mixing styrene-acrylic emulsion as base material, natural sand and various color pastes, or natural color sand and various filler assistants.

The stone-like paint is also called liquid stone paint, and is a building paint for imitating the effect of external wall stone. The stone-like paint is a single-component paint for building outer walls, which is formed by suspending two or more than two kinds of water-based color particles in a water-based interlayer and generates multiple colors through one-time spraying. The stone-like coating is prepared from emulsion, aggregate and various additives by spraying with a high-pressure spray gun to form a rich stone-like coating. As people advocate returning to truthfulness and returning to nature, the stone-like coating is used for decorating buildings, so that the buildings are more luxurious and more solemn, and are favored by people.

The sand textured coating is an emulsion type coating which takes synthetic resin emulsion as a main binder and contains crushed stone slag such as quartz sand, dolomite, granite, marble and the like or aggregate such as mica powder, perlite, crushed sawdust, elastic rubber particles and the like, and forms a decorative coating with stone texture on the surface of a building. The most outstanding characteristics of the coating are that the coating can generate the brilliant effect of diamond under illumination, enriches the variety of building materials and the design selection of decoration, and simultaneously, the coating has stable physical and chemical properties, is green and environment-friendly and has no pollution. Weather resistance/stain resistance/high and low temperature color difference

However, the existing coating with heterogeneous texture has the defects of poor freezing and thawing cycle resistance, easy cracking, poor weather resistance, easy yellowing, large high and low temperature color difference, easy flowering, poor contamination resistance, easy dirt and scale holding, poor acid rain resistance and easy pulverization and shedding.

Disclosure of Invention

In order to improve the freeze-thaw cycle resistance of the coating with the heterogeneous texture, the application provides the wall-shaped pure-color texture natural stone coating (natural stone) and the preparation method thereof, and the following technical scheme is adopted.

In a first aspect, a sand wall type solid-color texture natural stone coating is provided, which comprises the following raw materials in parts by weight: 23-26 parts of silicone-acrylic emulsion, 10-15 parts of inorganic silicone resin, 30-40 parts of water, 1-3 parts of cellulose, 0.2-0.4 part of polyamide wax slurry, 0.1-0.3 part of polyvinyl alcohol, 100-120 parts of inorganic calcined colored sand, 4-5 parts of lithium chloride, 32-36 parts of dimethylacetamide, 0.8-1.5 parts of film-forming assistant, 0.6-0.8 part of bactericide and 0.02-0.05 part of defoaming agent.

By adopting the technical scheme, the sand-wall-shaped pure-color-texture Tianchengshi stone coating is formed by one-step spraying, the coating weight is 600-800 g/square meter, the self weight is extremely light, the decorative safety is good, the color is pure, the covering power is good, and the coating does not generate flowers. The sand wall-shaped pure-color texture Tianchengshi stone coating has excellent storage stability after being prepared, has no agglomeration and is uniformly dispersed in a container after being stored for 7 days; the water resistance range of the coating after spray forming is 168-300h; the acid resistance range is 168-300h; the alkali resistance range is 168-300h; the artificial climate aging resistance range is 3000-3500h; the freeze-thaw cycle resistance performance is excellent, and the coating is not abnormal after the freeze-thaw cycle experiment; the stain resistance grade is 1 grade (2K solvent-free waterproof stain resistant scratch resistant finish paint of Sichuan coating high molecular material Co., ltd. Has lotus leaf effect, and the stain resistance can reach 0 grade). The sand-wall-shaped pure-color-texture natural stone coating has the advantages that through the mutual synergistic effect of the raw materials, after the coating is formed by spraying once, the coating has excellent freeze-thaw resistance cycle performance, small batch-to-batch color difference, excellent weather resistance, good stain resistance and vivid color, and has a wide application range. The sand-wall-shaped pure-color-texture natural stone paint has no problems of whitening when meeting water, over-softening paint film, sand falling during spraying, hair, large color difference, easy fading, no dirt resistance and the like in the application of the exterior wall paint, is an ideal updating product of exterior wall latex paint, traditional natural stone paint and granite paint, can be applied to the spraying decoration of prefabricated decorative plates such as inorganic integrated plates, metal aluminum veneers, soft porcelain and the like, is also suitable for the exterior wall decoration of high-rise building buildings, hotel houses, villa apartments, public buildings and the like, and meets the market demand.

The sand wall-shaped pure-color texture natural stone paint has the advantages that the emulsion can be formed on the surface of inorganic calcined colored sand uniformly through the mutual synergistic effect among polyamide wax slurry, polyvinyl alcohol, dissolved cellulose, silicone-acrylate emulsion and inorganic silicone resin, and the prepared sand wall-shaped pure-color texture natural stone paint can be stored uniformly and stably and is not prone to coagulation and agglomeration. Meanwhile, the polyamide wax slurry, the polyvinyl alcohol, the dissolved cellulose, the silicone-acrylate emulsion and the inorganic silicone resin are mutually acted, so that the wall-shaped pure-color textured natural stone coating is not easy to crack after being sprayed and formed, and has the characteristics of excellent freeze-thaw resistance cycle performance, good weather resistance, small high-low temperature color difference, excellent stain resistance, good acid rain resistance and the like.

Optionally, the silicone-acrylate emulsion is an inorganic-organic hybrid silicone-acrylate emulsion;

the inorganic-organic hybrid silicone-acrylic emulsion comprises the following raw materials in parts by weight: 160-190 parts of deionized water, 2.5-4 parts of emulsifier, 0.3-0.5 part of buffering agent, 100-110 parts of acrylic monomer, 0.15-0.17 part of 10wt% ammonium persulfate solution, 10-12 parts of gamma-aminopropyl triethoxysilane, and 15-20 parts of 8-10wt% lithium silicate solution.

By adopting the technical scheme, the inorganic calcined color sand with stable color and uniform particle size is completely and uniformly wrapped by the inorganic-organic hybrid silicone-acrylate emulsion and the inorganic silicone resin and effectively forms a film between the inorganic calcined color sand particles, and the inorganic-organic hybrid silicone-acrylate emulsion, the inorganic silicone resin and the calcined color sand are integrally and completely formed into a film, so that the coating has the advantages of excellent freeze-thaw resistance cycle, good cracking resistance, excellent self-cleaning property, good stain resistance, good weather resistance and excellent corrosion resistance.

Optionally, the inorganic-organic hybrid silicone-acrylic emulsion is prepared by the following method:

adding 85-90% of acrylic monomer and 45-50% of emulsifier to 45-50% of water, and stirring to mix well to obtain pre-emulsion;

adding 45-48% of the rest of acrylic monomers, a buffering agent and an emulsifying agent to 45-48% of the total amount of water, stirring until the mixture is uniformly mixed, heating to 55-60 ℃, adding 75-80% of an ammonium persulfate solution, and heating to 65-70 ℃ to obtain a premixed solution;

dropwise adding the pre-emulsion into the pre-mixed solution within 100-120min, reacting for 1-2h under the condition of heat preservation, then adding the rest of ammonium persulfate solution, heating to 75-80 ℃, curing for 2-2.5h, and cooling to 40-45 ℃ to obtain a prepolymer;

adding the rest of emulsifier into the rest of water under the stirring condition, then adding gamma-aminopropyl triethoxysilane and lithium silicate solution, and stirring until the mixture is uniformly mixed to obtain silicon mixed solution;

adding the silicon mixed solution into the prepolymer under the condition of stirring at 40-45 ℃, and stirring until the mixture is uniformly mixed to obtain the inorganic-organic hybrid silicone-acrylic emulsion.

Optionally, the emulsifier is one or two of polyethylene glycol octyl phenyl ether and sodium dodecyl sulfate.

Optionally, the acrylic monomer is one or more of methyl methacrylate, butyl methacrylate, methacrylic acid and acetoacetoxy ethyl methacrylate.

Optionally, the buffer is a 10-15wt% sodium carbonate solution.

Optionally, the cellulose is special cellulose WSG-H300T.

By adopting the technical scheme, the special cellulose has better performances in the aspects of dispersion, emulsification, adsorption, stability, thickening, anti-settling, film forming and the like, and can further improve the freeze-thaw cycle resistance and weather resistance of the prepared sand wall-shaped pure-color texture natural stone coating.

Optionally, the coalescing agent is a dodecanol ester.

In a second aspect, a preparation method of the sand-wall-shaped stone-like coating is provided, which comprises the following steps:

uniformly mixing 1/3 of the total amount of lithium chloride, dimethylacetamide and water to obtain a cellulose dissolving solution;

adding the defoaming agent, the polyamide wax slurry, the polyvinyl alcohol and the cellulose into water, stirring until the mixture is uniformly mixed, then adding the film-forming assistant and the bactericide, stirring until the mixture is uniformly mixed, then adding the silicone-acrylic emulsion and the inorganic silicone resin, and stirring for 20-30min to obtain slurry;

and adding the cellulose dissolving solution into the slurry under the stirring condition, stirring for 15-20min, then adding the inorganic sintered colored sand, and stirring until the inorganic sintered colored sand is uniformly mixed to obtain the wall-shaped natural stone coating with pure color texture.

By adopting the technical scheme, the cellulose dissolving solution is prepared by using lithium chloride, dimethylacetamide and water, and the cellulose dissolving solution and the pulp are uniformly mixed, so that the compatibility between the pulp and the cellulose dissolving solution is better, the mixed pulp and cellulose dissolving solution can be more uniformly formed on the surface of the inorganic sintered colored sand particles, and the stability, weather resistance and freeze-thaw resistance cycle performance of the prepared sand wall-shaped pure-color texture natural stone-forming coating are improved.

In summary, the present application has at least the following beneficial effects:

1. according to the sand wall-shaped pure-color texture natural stone coating, the polyamide wax slurry, the polyvinyl alcohol, the dissolved cellulose, the silicone-acrylic emulsion and the inorganic silicone resin are mutually synergistic, so that the emulsion can be uniformly formed on the surface of the inorganic calcined colored sand, the sand wall-shaped pure-color texture natural stone coating is not easy to crack after being sprayed and formed, and the sand wall-shaped pure-color texture natural stone coating has strong freeze-thaw resistance;

2. according to the sand-wall-shaped pure-color-texture natural stone coating, the inorganic-organic hybrid silicone-acrylate emulsion, the inorganic silicone resin and the special cellulose are added, so that the inorganic calcined colored sand is completely wrapped by the inorganic-organic hybrid silicone-acrylate emulsion and the inorganic silicone resin and effectively forms a film among colored sand particles, the emulsion, the resin and the colored sand are integrated to form a film, and the coating is excellent in freeze-thaw resistance, cracking resistance, staining resistance, weather resistance and corrosion resistance, and is simple and easy to operate in construction.

Detailed Description

The present invention will be described in further detail with reference to examples.

Raw materials

Preparation example I

Preparation example I-1

An inorganic-organic hybrid silicone-acrylic emulsion is prepared by the following method:

adding 90kg of deionized water into a dispersion machine, adding 10kg of methyl methacrylate, 15kg of butyl methacrylate, 30kg of methacrylic acid, 35kg of acetoacetoxy ethyl methacrylate, 1kg of polyethylene glycol octyl phenyl ether and 1kg of sodium dodecyl sulfate at the rotating speed of 500r/min, and stirring for 15min to obtain a pre-emulsion;

adding 10kg of acetoacetoxy ethyl methacrylate, 0.5kg of 15wt% sodium carbonate solution, 1kg of polyethylene glycol octyl phenyl ether and 0.8kg of lauryl sodium sulfate into 81kg of deionized water, stirring until the mixture is uniformly mixed, heating to 60 ℃, adding 0.128kg of 10wt% ammonium persulfate solution, and heating to 70 ℃ to obtain a premixed solution;

dropwise adding the pre-emulsion into the pre-mixed solution within 120min, reacting for 2h under the condition of heat preservation, then adding 0.032kg10wt% ammonium persulfate solution, heating to 80 ℃, curing for 2h, and cooling to 40 ℃ to obtain a prepolymer;

adding 0.2kg of sodium dodecyl sulfate into 9kg of deionized water under the stirring condition, then adding 10kg of gamma-aminopropyltriethoxysilane and 20kg of 8wt% lithium silicate solution, and stirring until the materials are uniformly mixed to obtain a silicon mixed solution;

adding the silicon mixed solution into the prepolymer under the stirring condition at 45 ℃, and stirring until the mixture is uniformly mixed to obtain the inorganic-organic hybrid silicone-acrylic emulsion.

Preparation example II

Preparation example II-1

The inorganic calcined colored sand is prepared by the following method:

uniformly mixing 4kg of inorganic pigment, 9kg of binder and 3kg of wetting dispersant, and grinding to 400 meshes to obtain inorganic color paste; wherein the inorganic pigment is titanium chromium brown; the binder is sodium silicate; the wetting and dispersing agent is sodium polyacrylate which is selected from the chemical industry ltd of Jinying of Jinyin of Ji, china.

Grinding 100kg of quartz sand to 150 meshes;

uniformly mixing the ground quartz sand with inorganic color paste to ensure that the inorganic color paste is uniformly coated on the outer surface of the quartz sand;

uniformly mixing the quartz sand coated with the inorganic color paste and 19kg of the binder, adding the mixture into a rotary kiln, preheating for 15min at the temperature of 150 ℃, and then calcining for 3h at the temperature of 1100 ℃ to obtain the 80-150-mesh inorganic calcined colored sand.

The auxiliary agent is prepared by the following method:

mixing 25kg of aluminum hydroxide, 6kg of anhydrous boric acid, 4kg of lithium oxide and 1.5kg of calcium fluoride, heating to 700 ℃, melting for 3.5 hours, then pouring into water at 2 ℃ for quenching, and grinding to 300 meshes to obtain the auxiliary agent.

Examples

Example 1

A sand wall-shaped pure-color-texture natural stone coating comprises the following raw materials: 23kg of silicone-acrylic emulsion, 10g of inorganic silicone resin, 40kg of water, 2kg of cellulose, 0.2kg of polyamide wax slurry, 0.1kg of polyvinyl alcohol, 100kg of inorganic calcined colored sand, 4kg of lithium chloride, 32kg of dimethylacetamide, 0.8kg of film-forming assistant, 0.6kg of bactericide and 0.02kg of defoaming agent; wherein the silicone-acrylate emulsion has the brand number of DS-996AD, the product number of 54, the viscosity of 1000-4000s and the content of more than or equal to 48 percent; the cellulose is HE10K (hydroxyethyl cellulose); the model of the polyamide wax slurry is hand feeling wax slurry W11; the inorganic calcined colored sand is prepared by the preparation example II-1; the film-forming additive is dodecyl alcohol ester; the defoaming agent is alkynediol; the bactericide is a mixture of chloromethyl and methylisothiazolinone.

A preparation method of a wall-shaped pure-color textured natural stone coating comprises the following steps:

uniformly mixing 1/3 of the total amount of lithium chloride, dimethylacetamide and water to obtain a cellulose dissolving solution;

adding the defoaming agent, the polyamide wax slurry, the polyvinyl alcohol and the cellulose into water, stirring until the mixture is uniformly mixed, then adding the film-forming assistant and the bactericide, stirring until the mixture is uniformly mixed, then adding the silicone-acrylic emulsion and the inorganic silicone resin, and stirring for 30min to obtain slurry;

and adding the cellulose dissolving solution into the slurry under the stirring condition, stirring for 20min, then adding the inorganic calcined colored sand, and stirring until the inorganic calcined colored sand is uniformly mixed to obtain the wall-shaped natural stone coating with pure color texture.

Example 2

A wall-shaped pure-color-texture space stone paint is different from that of the paint in the embodiment 1 in that the cellulose is special cellulose (the model is WSG-H300T) with the same amount, and the rest is the same as that of the paint in the embodiment 1.

Example 3

A wall-like natural stone paint with a solid color texture is different from that of example 2 in that the silicone-acrylic emulsion is the same amount of the inorganic-organic hybrid silicone-acrylic emulsion prepared in preparation example I-1, and the rest is the same as that of example 2.

Example 4

A wall-like natural stone paint with a pure color and a texture is different from that of example 3 in that in the raw material of inorganic-organic hybrid silicone-acrylic emulsion, the same amount of gamma-aminopropyltriethoxysilane is used to replace 8wt% of lithium silicate solution, and the rest is the same as that of example 3.

Example 5

A wall-like natural stone paint with a solid color texture is different from that of example 3 in that in the raw material of inorganic-organic hybrid silicone-acrylic emulsion, 8wt% of lithium silicate solution in equal amount is used to replace gamma-aminopropyltriethoxysilane, and the rest is the same as that of example 3.

Example 6

A wall-shaped pure-color-texture Tianchengshi stone paint is different from the paint in the embodiment 3 in that the sintered colored sand is conventional commercial sintered colored sand, the conventional commercial sintered colored sand is selected from Dechang mineral processing factories in Lingshu county, the product number is 42, and the balance is the same as the embodiment 3.

Comparative example

Comparative example 1

A sand wall-like stone-like paint which is different from that of example 1 in that lithium chloride and dimethylacetamide are not added to the raw materials of the sand wall-like stone-like paint, and the rest is the same as that of example 1.

Comparative example 2

A wall-like stone-like coating material differing from that of example 1 in that no polyamide wax slurry was added to the raw materials of the wall-like stone-like coating material, and the rest was the same as in example 1.

Performance test

The following performance tests were carried out on 8 kinds of sand-wall-like stone-like coatings prepared in examples 1 to 6 and comparative examples 1 to 2, respectively:

storage stability: observing the state of 7d of the 8 sand-wall-shaped stone-like coatings stored in the container;

respectively spraying and molding the 8 sand wall-shaped stone-like coatings at one step, wherein the coating weight is 600-800 g/square meter, and detecting the sprayed sand wall-shaped stone-like coatings.

And (3) detecting water resistance: respectively soaking the 8 sand-wall-shaped stone-like coatings subjected to spray forming in water, and recording the duration of soaking the 8 sand-wall-shaped stone-like coatings in the water and keeping the 8 sand-wall-shaped stone-like coatings free of abnormal phenomena;

and (3) acid resistance detection: respectively soaking the 8 kinds of sand wall-shaped stone-like coatings subjected to spray forming in hydrochloric acid with the pH value of 2, and recording the duration of soaking the 8 kinds of sand wall-shaped stone-like coatings in the hydrochloric acid and keeping the soaking time without abnormal phenomena;

and (3) alkali resistance detection: respectively soaking the 8 kinds of sand wall-shaped stone-like coatings subjected to spray forming in a sodium hydroxide solution with the pH value of 12, and recording the duration of soaking the 8 kinds of sand wall-shaped stone-like coatings in the sodium hydroxide solution and keeping the 8 kinds of sand wall-shaped stone-like coatings free from abnormal phenomena;

detecting the artificial climate aging resistance: observing the duration of the 8 sand-wall-shaped stone-like coatings subjected to spray forming, wherein the coatings are not cracked, bulged, peeled, discolored obviously and faded obviously;

and (3) detecting the freeze-thaw resistance cycle performance: the freeze-thaw cycle resistance of the coatings of the 8 sand-wall stone-like coatings is detected according to JGT 25-1999 'method for measuring freeze-thaw cycle resistance of coatings of architectural coatings';

the 8 kinds of sand-walled stone-like coating materials after spray molding were examined for their stain resistance, and the results are shown in table 1.

TABLE 1 test results

The sand-wall-shaped stone-like coating is uniformly dispersed, and a coating obtained by one-step spray forming has excellent freeze-thaw resistance cycle performance, stability, weather resistance and stain resistance, is better in construction convenience, is formed by one-step spray forming, has a coating weight of 600-800 g/square meter generally, has extremely light self weight, good decoration safety, pure color, good covering power and no flowering (the spray coating is simple, the coating can be fully covered, the gun adjustment is simple, the skill requirement is low, the probability of occurrence of construction problems is low, and the requirement on the flatness of a wall body is low). The sand-wall-shaped stone-like coating has excellent storage stability after being prepared, and does not agglomerate and is uniformly dispersed in a container after being stored for 7 days; the water resistance range of the coating after spray forming is 168-300h; the acid resistance range is 168-300h; the alkali resistance range is 168-300h; the artificial climate aging resistance range is 3000-3500h; the freeze-thaw cycle resistance is excellent, and the coating has no abnormality after the freeze-thaw cycle experiment; the stain resistance grade is 1 grade (2K solvent-free waterproof stain resistant scratch resistant finish paint of Sichuan coating high molecular material Co., ltd. Has lotus leaf effect, and the stain resistance can reach 0 grade). The sand wall-shaped pure-color textured natural stone coating has excellent freeze-thaw resistance cycle performance after being formed by spraying once through the mutual synergistic effect among the raw materials, has small color difference among batches, excellent weather resistance, good stain resistance and vivid color, has wide application range, can be applied to spraying decoration of prefabricated decorative plates such as inorganic integrated plates, metal aluminum veneers, soft porcelain and the like, is also suitable for outer wall decoration of high-rise building buildings, hotel houses, villas, public buildings and the like, and meets the market demand.

Comparing comparative example 1 with example 1, the storage stability of the sand-wall pure-color-texture natural stone coating prepared in example 1 is non-caking and uniform dispersion; the sprayed and formed coating can keep 260 hours in water and does not change color; the sprayed and formed coating can keep 260 hours of no color change in hydrochloric acid; the sprayed and formed coating can keep no color change for 255 hours in a sodium hydroxide solution; the coating after spray forming can keep 3150h without cracking, bulging, peeling, obvious color change and obvious light loss; the coating after spray forming has no abnormal condition after freeze-thaw resistance; the stain resistance rating was 1. The sand wall-shaped stone-like coating prepared in the comparative example 1 has storage stability in a container, namely thickening and uniform dispersion; the sprayed and formed coating can keep 165h in water and does not change color; the sprayed and formed coating can keep 165h in hydrochloric acid and does not change color; the sprayed and formed coating can keep 165h in sodium hydroxide solution without color change; the coating after spray forming can keep 2750h without cracking, bulging, peeling, obvious color change and obvious light loss; the coating after spray forming cracks after a freeze-thaw resistance cycle experiment; the stain resistance rating was 3. Compared with example 1, lithium chloride and dimethylacetamide are not added into the raw materials of the sand-wall-shaped stone-like coating in comparative example 1, so that the freeze-thaw cycle resistance, storage stability, weather resistance and stain resistance of the prepared sand-wall-shaped stone-like coating are all reduced. Therefore, the addition of the cellulose dissolving solution can improve the freeze-thaw cycle resistance, weather resistance, cracking resistance and pollution resistance of the sand-wall stone-like coating, and the construction is simple and easy to operate.

Comparing comparative example 2 with example 1, the storage stability of the sand-walled stone-like paint prepared in example 1 is non-caking and uniform dispersion; the sprayed and formed coating can keep 260 hours in water and does not change color; the sprayed and formed coating can keep 260 hours of no color change in hydrochloric acid; the sprayed and formed coating can keep no color change for 255 hours in a sodium hydroxide solution; the coating after spray forming can keep 3150h without cracking, bulging, peeling, obvious color change and obvious light loss; the coating after spray forming has no abnormal condition after freeze-thaw resistance; the stain resistance rating was 1. The sand-wall-shaped stone-like coating prepared in the comparative example 2 has the advantages of no agglomeration and uniform dispersion in a container; the sprayed and formed coating can keep 195h in water without changing color; the sprayed and formed coating can keep 195 hours in hydrochloric acid without color change; the sprayed and formed coating can keep unchanged color for 190 hours in a sodium hydroxide solution; the coating after spray forming can keep no cracking, no bulging, no peeling, no obvious color change and no obvious light loss after 2850 hours; the powder falling phenomenon of the coating after spray forming is subjected to a freeze-thaw resistance cycle experiment; the stain resistance rating was 2. Compared with example 1, the raw materials of the sand-wall-shaped stone-like coating in the comparative example 2 are not added with polyamide wax slurry, so that the prepared sand-wall-shaped stone-like coating has reduced stability, weather resistance, stain resistance and color uniformity. Therefore, the addition of the polyamide wax slurry can further improve the freeze-thaw cycle resistance and the stability of the sand-wall stone-like coating, so that the coating after spray forming has excellent weather resistance and is not easy to discolor.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (10)

1. A sand wall-shaped solid-color-texture natural stone coating (natural stone) is characterized by comprising the following raw materials in parts by weight: 23-26 parts of silicone-acrylic emulsion, 10-15 parts of inorganic silicone resin, 30-40 parts of water, 1-3 parts of cellulose, 0.2-0.4 part of polyamide wax slurry, 0.1-0.3 part of polyvinyl alcohol, 100-120 parts of inorganic calcined colored sand, 4-5 parts of lithium chloride, 32-36 parts of dimethylacetamide, 0.8-1.5 parts of film-forming assistant, 0.6-0.8 part of bactericide and 0.02-0.05 part of defoaming agent.

2. The paint as claimed in claim 1, wherein the silicone-acrylate emulsion is an inorganic-organic hybrid silicone-acrylate emulsion;

the inorganic-organic hybrid silicone-acrylic emulsion comprises the following raw materials in parts by weight: 160-190 parts of deionized water, 2.5-4 parts of emulsifier, 0.3-0.5 part of buffering agent, 100-110 parts of acrylic monomer, 0.15-0.17 part of 10wt% ammonium persulfate solution, 10-12 parts of gamma-aminopropyl triethoxysilane, and 15-20 parts of 8-10wt% lithium silicate solution.

3. The paint with the sand-wall pure-color texture as claimed in claim 2, wherein the inorganic-organic hybrid silicone-acrylic emulsion is prepared by the following method:

adding 85-90% of acrylic monomer and 45-50% of emulsifier to 45-50% of water, and stirring to mix well to obtain pre-emulsion;

adding 45-48% of the rest of acrylic monomers, a buffering agent and an emulsifying agent to 45-48% of the total amount of water, stirring until the mixture is uniformly mixed, heating to 55-60 ℃, adding 75-80% of an ammonium persulfate solution, and heating to 65-70 ℃ to obtain a premixed solution;

dropwise adding the pre-emulsion into the pre-mixed solution within 100-120min, reacting for 1-2h under the condition of heat preservation, then adding the rest of ammonium persulfate solution, heating to 75-80 ℃, curing for 2-2.5h, and cooling to 40-45 ℃ to obtain a prepolymer;

adding the rest of emulsifier into the rest of water under the stirring condition, then adding gamma-aminopropyl triethoxysilane and lithium silicate solution, and stirring until the mixture is uniformly mixed to obtain silicon mixed solution;

and adding the silicon mixed solution into the prepolymer under the stirring condition at 40-45 ℃, and stirring until the mixture is uniformly mixed to obtain the inorganic organic hybrid silicone-acrylic emulsion.

4. The paint as claimed in claim 3, wherein the emulsifier is one or both of polyethylene glycol octyl phenyl ether and sodium dodecyl sulfate.

5. The paint as claimed in claim 3, wherein the acrylic monomer is one or more of methyl methacrylate, butyl methacrylate, methacrylic acid, and acetoacetoxy ethyl methacrylate.

6. A stone paint with sand-walled solid color texture as claimed in claim 3, wherein the buffering agent is 10-15wt% sodium carbonate solution.

7. The sand-walled solid-colored textured aragonite coating as claimed in any one of claims 1 to 6, wherein the cellulose is special cellulose WSG-H300T.

8. A marl-like paint as claimed in any one of claims 1 to 6, wherein the filming aid is a dodecyl alcohol ester.

9. The paint as claimed in claim 1, wherein the inorganic calcined color sand is 60-300 mesh inorganic pure color calcined color sand having proprietary intellectual property rights.

10. A preparation method of a sand wall-shaped pure-color textured natural stone coating is characterized by comprising the following steps:

uniformly mixing 1/3 of the total amount of lithium chloride, dimethylacetamide and water to obtain a cellulose dissolving solution;

adding the defoaming agent, the polyamide wax slurry, the polyvinyl alcohol and the cellulose into water, stirring until the mixture is uniformly mixed, then adding the film-forming assistant and the bactericide, stirring until the mixture is uniformly mixed, then adding the silicone-acrylic emulsion and the inorganic silicone resin, and stirring for 20-30min to obtain slurry;

and adding the cellulose dissolving solution into the slurry under the stirring condition, stirring for 15-20min, then adding corresponding inorganic calcined colored sand, and stirring until the mixture is uniformly mixed to obtain the wall-shaped pure-color-texture natural stone coating.