Brightly colored paint for stone and metal tiles and its application

Abstract

The present invention relates to the technical field of colored stone metal tiles, and specifically to a coating for brightly colored stone metal tiles and its application. The mass percentage content of the coating raw material components is 10%-50% of organosilicon-modified acrylic acid, 5%-30% of potassium silicate, 5%-15% of sodium silicate, 1%-5% of titanium dioxide, 1%-5% of glass powder, 0.5%-1.5% of zinc oxide, 0.02%-0.10% of leveling agent, 0.02%-0.10% of mildew inhibitor, 0.02%-0.15% of dispersant, 0.02%-0.15% of ammonia neutralizer, 0.02%-0.10% of defoaming agent, 5%-30% of organic color paste, and the balance is water. The present invention adds organic color paste to the coating and colors natural white quartz sand during the production process of the colored stone metal tiles. The obtained colored stone metal tiles have a variety of colors and bright and vivid colors; there is no need to prepare colored sand by high-temperature calcination, which simplifies the production process and reduces energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of colored stone metal tiles, in particular to a coating for brightly colored stone metal tiles and application thereof. Background Art

[0002] Colored stone metal tiles are roofing decoration materials made of aluminum-zinc-coated steel sheets with excellent anti-corrosion properties as the base, covered with adhesive, colored sand layer, and spray protective layer. Because of its beautiful, light, durable and environmentally friendly appearance, it has been widely used in modern construction and has become the mainstream product of roofing decoration materials.

[0003] In the current production process, the color of colored stone metal tiles is completely determined by colored sand. Therefore, the production of colored stone metal tiles first requires the preparation of colored sand of the desired color. The production process of colored sand is as follows: (1) After drying and crushing the basalt, it is screened to produce the required particle size; (2) Color paste is prepared according to the formula; (3) The prepared color paste and particles are fully mixed in a certain proportion and then continuously calcined and kept warm at 600-900℃ in a rotary kiln; (4) Cooling, inspection and packaging.

[0004] However, the production of colored sand requires a high-temperature calcination step. Brightly colored organic color pastes are not heat-resistant and tend to fade or even evaporate when heated above 200°C. Therefore, existing methods for producing colored sand can only use relatively monotonous inorganic color pastes for calcination and coloring. As a result, the color of colored stone metal tiles produced using colored sand is limited and relatively dull, making it difficult to meet the demand for vibrant colors in modern architecture. Furthermore, the high-temperature calcination of colored sand consumes a large amount of energy, resulting in high production costs. Summary of the Invention

[0005] Aiming at the technical problems that in the traditional production process of colored stone metal tiles, the color depends on colored sand, and the colored sand production can only be colored with inorganic color paste, resulting in a small number of color varieties, dull colors and high production costs, the present invention provides a paint for brightly colored stone metal tiles and its application. Organic color paste is added to the paint, and natural white quartz sand is colored during the production process of the colored stone metal tiles. The resulting colored stone metal tiles have a wide variety of colors and bright and vivid colors; no high-temperature calcination is required to prepare the colored sand, which simplifies the production process and reduces energy consumption.

[0006] In a first aspect, the present invention provides a brightly colored paint for stone and metal tiles, the raw material components of which are as follows: 10%-50% silicone-modified acrylic acid, 5%-30% potassium silicate, 5%-15% sodium silicate, 1%-5% titanium dioxide, 1%-5% glass powder, 0.5%-1.5% zinc oxide, 0.02%-0.10% leveling agent, 0.02%-0.10% mildewproofing agent, 0.02%-0.15% dispersant, 0.02%-0.10% ammonia neutralizer, 0.02%-0.10% defoaming agent, 5%-30% organic color paste, and the balance is water.

[0007] Furthermore, the mass ratio of sodium silicate to potassium silicate in the raw materials is 2:1-7. The coating produced using this ratio is durable in storage, does not agglomerate during storage, dries quickly after spraying, and has strong scrub resistance after drying. A low potassium silicate ratio will result in insufficient hydrolysis of the coating; a high potassium silicate ratio will cause the coating to easily demulsify, agglomerate, and precipitate silicates.

[0008] Preferably, the mass ratio of sodium silicate to potassium silicate in the raw materials is 2:5.

[0009] Furthermore, the preparation method of the brightly colored stone metal tile coating is as follows: potassium silicate and sodium silicate are mixed and stirred and dispersed with water, titanium dioxide, glass powder, zinc oxide are added, and then a leveling agent, a mildew inhibitor, an ammonia neutralizer, a dispersant and a defoaming agent are added, and finally an organic color paste and silicone-modified acrylic acid are added to mix to obtain the brightly colored stone metal tile coating; stirring is continued during the addition and mixing process of the raw materials.

[0010] Further, potassium silicate and sodium silicate are mixed and water is added, followed by stirring at a speed of 300-1200 r / min for 0.5-4 hours; a leveling agent, a mildew inhibitor, an ammonia neutralizer, a dispersant and a defoaming agent are added, followed by stirring at a speed of 300-1200 r / min for 0.5-2 hours; and an organic color paste and silicone-modified acrylic acid are added, followed by stirring at a speed of 300-1200 r / min for 0.5-4 hours.

[0011] In a second aspect, the present invention provides a use of the above-mentioned brightly colored stone metal tile coating in the preparation of colored stone metal tiles. The preparation of the colored stone metal tiles comprises the following steps:

[0012] (1) Preparation of base tiles: Process the aluminum-zinc coated steel sheet into the required specifications to make base tiles, wipe them with anhydrous ethanol, and let them air dry for later use;

[0013] (2) Spraying adhesive: spray the colored stone metal tile adhesive evenly on the surface of the base tile to form a base glue layer with uniform thickness;

[0014] (3) Sanding: Spread quartz sand evenly on the surface of the base adhesive layer to form a sand layer;

[0015] (4) Spraying paint: spray brightly colored stone and metal tile paint on the surface of the sand layer to form a coating film on the surface of the sand layer;

[0016] (5) Baking: heating and baking the base tile covered with the primer layer, sand layer and coating film at a temperature of 160-180°C for a time of ≥20 minutes to obtain the colored stone metal tile.

[0017] Furthermore, the thickness of the aluminum-zinc-coated steel sheet in step (1) is 0.2-0.5 mm; the thickness of the base adhesive layer in step (2) is 0.13-0.14 mm; and the thickness of the coating film in step (4) is 20-30 μm. A base adhesive layer thickness of 0.13-0.14 mm can achieve a good sand-adhesive effect. If the thickness is too low, sand will easily fall off, while if the thickness is too high, cracking and bottom exposure will easily occur during the bending process. A coating film thickness of 20-30 μm has good glossiness and transparency and can effectively cover the sand layer. If the thickness is too high, the transparency is poor and it is easy to turn white after being soaked in water, affecting the color performance of the colored stone metal tile. If the thickness is too low, sand particles in the sand layer will easily fall off.

[0018] Furthermore, the quartz sand in step (3) has a particle size of 20-40 mesh.

[0019] The mechanism of the present invention is:

[0020] The sodium silicate and potassium silicate in the brightly colored stone metal tile coating mix to form a sodium-potassium mixture, which hydrolyzes with a modified silicone-acrylic emulsion rich in polyalkoxysilanes, further reacting with the SiO2 in the glass frit to form a stable sol system. During the baking process after spraying the brightly colored stone metal tile coating on the sand layer, the sol system undergoes high-temperature drying and aging to form a three-dimensional network structure, coating the organic color paste on the sand layer and giving the stone metal tile a vibrant color. Simultaneously, the zinc oxide in the brightly colored stone metal tile coating reacts with the alkali metal silicate to form an insoluble silicate, which in turn forms a dense protective film on the stone metal tile surface, reducing water permeability and improving the weather resistance of the stone metal tile.

[0021] The beneficial effects of the present invention are:

[0022] The paint for brightly colored stone metal tiles provided by the present invention is prepared by adding organic color paste to the raw materials and coloring natural white quartz sand during the production process of the colored stone metal tiles. The colored stone metal tiles can be prepared using the organic color paste with bright colors and high brightness. The prepared colored stone metal tiles have a variety of colors and bright colors, meeting the demand for bright colors in architectural decoration.

[0023] The brightly colored stone metal tile coating of the present invention is used to produce colored stone metal tiles. The sand layer uses natural white quartz sand, which is colored by spraying the coating and then baking. There is no need to use high-temperature calcination to prepare colored sand, which simplifies the production process of the colored stone metal tiles and reduces energy consumption during the production process of the colored stone metal tiles.

[0024] 3. The colored stone metal tiles produced by the present invention have strong weather resistance and are not prone to powdering, sand loss, or discoloration. The colored stone metal tiles have a long service life and can maintain bright colors for a long time. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0026] Example 1

[0027] A brightly colored paint for stone and metal tiles, the added mass of the raw materials and the corresponding mass percentage content are shown in Table 1:

[0028] Table 1 Raw material addition mass and content of Example 1

[0029] Raw material name Added mass / (g) Content / (wt%) Silicone modified acrylic 130 41.41% Potassium silicate 50 15.93% Sodium silicate 20 6.37% Titanium dioxide 4.9 1.56% glass powder 15 4.78% Leveling agent 0.24 0.08% mildew inhibitors 0.2 0.06% dispersants 0.34 0.11% Ammonia neutralizer 0.24 0.08% defoaming agent 0.24 0.08% zinc oxide 3 0.96% 2540 red paste 19.8 6.31% Deionized water 70 22.30%

[0030] The preparation method of bright color stone metal tile coating is as follows:

[0031] (1) Mix potassium silicate and sodium silicate, add deionized water, and stir at room temperature at a speed of 600 r / min for 2 h;

[0032] (2) Add titanium dioxide, glass powder and zinc oxide and stir evenly;

[0033] (3) Add leveling agent, mildew inhibitor, ammonia neutralizer, dispersant and defoamer, and stir at room temperature at a speed of 600 r / min for 0.5 h;

[0034] (4) Add 2540 red paste and silicone-modified acrylic acid, stir at 800 r / min at room temperature for 1 hour to prepare brightly colored stone metal tile coating.

[0035] The preparation method of organosilicon-modified acrylic acid is as follows:

[0036] In parts by weight, 70 parts of butyl acrylate, 30 parts of methyl methacrylate and 100 parts of deionized water were added to a reaction bottle, and the mixture was heated to 50-60° C. and preheated for 1 hour; 4 parts of a composite emulsifier and 0.5 parts of a KH550 silane coupling agent were added, the temperature was raised to 75° C., and the mixture was stirred at 600 r / min for 1 hour. During the stirring process, 2 parts of methyltrioxymethylsiloxane and 15 parts of phenyltrioxymethylsiloxane were dropwise added; 0.5 parts of ammonium persulfate dissolved in 50 parts of deionized water were added, the temperature was maintained at about 75° C. for 10 hours, and the pH value of the solution was adjusted to 7 with ammonia water. The mixture was stirred at 900 r / min for 1 hour. After the reaction was completed, the solution was cooled to 40° C. to prepare silicone-modified acrylic acid.

[0037] Example 2

[0038] A brightly colored paint for stone metal tiles, the added mass of the raw materials and the corresponding mass percentage content are shown in Table 2:

[0039] Table 2 Raw material addition mass and content of Example 2

[0040] Raw material name Added mass / (g) Content / (wt%) Silicone modified acrylic 130 43.59% Potassium silicate 50 16.76% Sodium silicate 20 6.71% Titanium dioxide 4.7 1.58% glass powder 15 5.03% Leveling agent 0.24 0.08% mildew inhibitors 0.2 0.07% dispersants 0.34 0.11% Ammonia neutralizer 0.24 0.08% defoaming agent 0.24 0.08% zinc oxide 3 1.01% Pink122 red paste 4.3 1.45% Deionized water 70 23.47%

[0041] In Example 2, pink122 red paste was used instead of 2540 red paste. The rest of the preparation method and the silicone-modified acrylic acid used were the same as those in Example 1.

[0042] Comparative Example 1

[0043] A colored stone metal tile coating, the added mass of the raw materials and the corresponding mass percentage content are shown in Table 3:

[0044] Table 3 Raw material addition mass and content of Comparative Example 1

[0045] Raw material name Added mass / (g) Content / (wt%) Silicone modified acrylic 100 41.66% Potassium silicate 30 12.50% Sodium silicate 10 4.17% Titanium dioxide 3.8 1.58% glass powder 5 2.08% Leveling agent 0.24 0.10% mildew inhibitors 0.2 0.08% dispersants 0.34 0.14% Ammonia neutralizer 0.24 0.10% defoaming agent 0.24 0.10% 2540 red paste 15.2 6.33% Deionized water 70 29.16%

[0046] The raw materials of Comparative Example 1 do not contain zinc oxide, and the rest of the preparation method and the silicone-modified acrylic acid used are the same as those in Example 1.

[0047] Comparative Example 2

[0048] A colored stone metal tile coating, the added mass of the raw materials and the corresponding mass percentage content are shown in Table 4:

[0049] Table 4 Raw material addition mass and content of Comparative Example 2

[0050] Raw material name Added mass / (g) Content / (wt%) Silicone modified acrylic 130 41.11% Potassium silicate 50 15.81% Sodium silicate 20 6.32% Titanium dioxide 5 1.58% glass powder 20 6.32% Leveling agent 0.24 0.08% mildew inhibitors 0.2 0.06% dispersants 0.34 0.11% Ammonia neutralizer 0.24 0.08% defoaming agent 0.24 0.08% zinc oxide 0 0 2540 red paste 20 6.32% Deionized water 70 22.13%

[0051] The raw materials of Comparative Example 2 do not contain zinc oxide, and the rest of the preparation method and the silicone-modified acrylic acid used are the same as those in Example 1.

[0052] Comparative Example 3

[0053] A colored stone metal tile coating, the added mass of the raw materials and the corresponding mass percentage content are shown in Table 5:

[0054] Table 5 Raw material addition mass and content of Comparative Example 3

[0055] Raw material name Added mass / (g) Content / (wt%) epoxy resin 130 41.41% Potassium silicate 50 15.93% Sodium silicate 20 6.37% Titanium dioxide 4.9 1.56% glass powder 15 4.78% Leveling agent 0.24 0.08% mildew inhibitors 0.2 0.06% dispersants 0.34 0.11% Ammonia neutralizer 0.24 0.08% defoaming agent 0.24 0.08% zinc oxide 3 0.96% 2540 red paste 19.8 6.31% Deionized water 70 22.30%

[0056] Comparative Example 3 uses epoxy resin instead of silicone-modified acrylic acid, and the rest of the preparation method is the same as that of Example 1.

[0057] The coatings prepared in Examples 1-2 and Comparative Examples 1-3 are used to prepare colored stone metal tiles, comprising the following steps:

[0058] (1) Preparation of base tiles: Process the aluminum-zinc coated steel sheet into the required specifications to make base tiles, wipe them with anhydrous ethanol, and let them air dry for later use;

[0059] (2) Spraying adhesive: spray the colored stone metal tile adhesive evenly on the surface of the base tile to form a base adhesive layer with a thickness of 0.13-0.14mm;

[0060] (3) Sanding: Spread quartz sand evenly on the surface of the base adhesive layer. The quartz sand particle size is 20-40 mesh to form a sand layer;

[0061] (4) Spraying paint: spray brightly colored stone metal tile paint on the surface of the sand layer to form a coating film on the surface of the sand layer with a coating film thickness of 20-30 μm;

[0062] (5) Baking: heating and baking the base tile covered with the primer layer, sand layer and coating film at a temperature of 160-180°C for a time of ≥20 minutes to obtain the colored stone metal tile.

[0063] The weather resistance test was conducted on the colored stone metal tiles prepared using the coatings of Examples 1-2 and Comparative Examples 1-3. The test results are shown in Table 6.

[0064] Table 6 Weathering resistance test results of colored stone metal tiles

[0065]

[0066] In Examples 1 and 2, organic color pastes of different colors were used as one of the raw materials to produce brightly colored stone metal tile coatings. The weather resistance of the colored stone metal tiles prepared using the coatings of Examples 1 and 2 met the index requirements.

[0067] In Comparative Example 1, the amount of sodium silicate added was low, and no zinc oxide was added. The alkali resistance, water resistance and construction performance of the prepared colored stone metal tile were slightly poor.

[0068] In Comparative Example 2, a larger amount of glass powder was added, and no zinc oxide was added. The water resistance of the obtained colored stone metal tile was slightly poor, and it slightly agglomerated during hot storage and precipitated crystals during low-temperature storage.

[0069] Comparative Example 3 uses epoxy resin instead of silicone-modified acrylic acid, and the obtained colored stone metal tile has low hardness and slightly poor scrub resistance.

[0070] It can be seen that the colored stone metal tiles prepared using the coating of the present invention have strong weather resistance and are not prone to powdering, sand loss, and discoloration.

[0071] Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and substance of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any changes or substitutions that can be readily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall be within the scope of protection of the present invention.

Claims

1. Application of a brightly colored stone metal tile coating in the preparation of colored stone metal tiles, characterized in that: The preparation of colored stone metal tiles includes the following steps: (1) Preparation of base tiles: Process the aluminum-zinc coated steel sheet into the required specifications to make base tiles, wipe them with anhydrous ethanol, and let them air dry for later use; (2) Spraying adhesive: spray the colored stone metal tile adhesive evenly on the surface of the base tile to form a base glue layer with uniform thickness; (3) Sanding: Spread quartz sand evenly on the surface of the base adhesive layer to form a sand layer; (4) Spraying paint: spray brightly colored stone and metal tile paint on the surface of the sand layer to form a coating film on the surface of the sand layer; (5) Baking: heating and baking the base tile covered with the primer layer, sand layer and coating film at a temperature of 160-180°C for a time of ≥20 min to obtain the colored stone metal tile; The raw material components of the brightly colored stone metal tile coating are as follows: Silicone-modified acrylic acid 10%-50%, potassium silicate 5%-30%, sodium silicate 5%-15%, titanium dioxide 1%-5%, glass powder 1%-5%, zinc oxide 0.5%-1.5%, leveling agent 0.02%-0.10%, mildew inhibitor 0.02%-0.10%, dispersant 0.02%-0.15%, ammonia neutralizer 0.02%-0.10%, defoaming agent 0.02%-0.10%, organic color paste 5%-30%, the balance is water; The preparation method of the brightly colored coating for stone metal tiles comprises the following steps: mixing potassium silicate and sodium silicate, adding water, stirring and dispersing the mixture, adding titanium dioxide, glass powder, zinc oxide, a leveling agent, a mildew preventer, an ammonia neutralizer, a dispersant, and a defoaming agent, and finally adding an organic color paste and silicone-modified acrylic acid to prepare the brightly colored coating for stone metal tiles; stirring is continued during the addition and mixing of the raw materials.

2. The use according to claim 1, characterized in that The mass ratio of sodium silicate to potassium silicate in the raw materials is 2:1-7.

3. The use according to claim 1, characterized in that The mass ratio of sodium silicate to potassium silicate in the raw materials is 2:

5.

4. The use according to claim 1, wherein Mix potassium silicate and sodium silicate, add water, and stir at a speed of 300-1200 r / min for 0.5-4 hours; add leveling agent, mildew inhibitor, ammonia neutralizer, dispersant and defoamer, and stir at a speed of 300-1200 r / min for 0.5-2 hours; add organic color paste and silicone modified acrylic acid, and stir at a speed of 300-1200 r / min for 0.5-4 hours.

5. The use according to claim 1, characterized in that The thickness of the aluminum-zinc-coated steel sheet in step (1) is 0.2-0.5 mm; the thickness of the base adhesive layer in step (2) is 0.13-0.14 mm; and the thickness of the coating film in step (4) is 20-30 μm.

6. The use according to claim 1, wherein The quartz sand in step (3) has a particle size of 20-40 mesh.

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