Frosted coating for glass and preparation method thereof

Abstract

The invention relates to the technical field of coating preparation, and particularly discloses a frosted coating for glass and a preparation method of the frosted coating. The frosted coating for glass comprises the following components in parts by weight: 50-70 parts of acrylic resin; 20 to 30 parts of frosted filler; 1-5 parts of a curing agent; 40 to 60 parts of water; the frosted filler comprises quartz sand, silica powder and zinc oxide. Researches show that the frosted coating for the glass not only has an antibacterial effect, but also has relatively good adhesive force; the method has an important application prospect. In the actual application process, the frosted coating is directly sprayed or coated on the surface of glass in a rolling manner, has better stain resistance, and also has better water resistance (no whitening or falling phenomenon of a glass plate after being soaked in water for more than 15 days) and a matting effect.

Description

Technical Field

[0001] The present invention relates to the technical field of coating preparation, and in particular to a frosted coating for glass and a preparation method thereof. Background Art

[0002] With the development of the architectural decoration and home design industries, the demand for glass surface treatment is becoming increasingly stringent. Frosted glass is widely used due to its unique visual effects and privacy protection features. Traditional frosted glass manufacturing methods mainly include chemical etching and sandblasting. These methods are not only costly and complex, but also pose numerous environmental issues, such as the potential for environmental pollution caused by the discharge of chemical etching solutions. In addition, these methods are difficult to achieve large-scale and rapid production and require high technical skills from operators. Therefore, the development of a frosted coating that is easy to apply, environmentally friendly, and cost-effective has become an urgent issue in the industry.

[0003] In light of these challenges, the industry has recently begun exploring the use of coatings to achieve frosted glass surfaces. This novel approach involves applying a coating made from a mixture of specific ingredients directly to the glass surface, followed by a curing process to achieve the desired frosted effect. While frosted coatings demonstrate significant potential, practical applications still face several challenges. First, existing frosted coatings lack antimicrobial properties, making them difficult to meet antimicrobial requirements. Furthermore, some existing frosted coatings exhibit poor adhesion and are prone to detachment from the glass surface. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention first provides a frosted coating for glass and a preparation method thereof.

[0005] The technical solutions of the present invention are as follows:

[0006] The present invention first provides a frosted coating for glass, which comprises the following components in parts by weight: 50-70 parts of acrylic resin; 20-30 parts of frosted filler; 1-5 parts of curing agent; and 40-60 parts of water.

[0007] The present invention adds a frosted filler consisting of quartz sand, silicon micropowder and zinc oxide into the frosted paint for glass, which can make the frosted paint for glass have certain antibacterial properties.

[0008] Preferably, the frosted paint for glass comprises the following components in parts by weight: 60-70 parts of acrylic resin; 20-25 parts of frosted filler; 1-3 parts of curing agent; and 50-60 parts of water.

[0009] Most preferably, the frosted paint for glass comprises the following components in parts by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent; and 52 parts of water.

[0010] Preferably, the frosted filler comprises quartz sand, silica powder and zinc oxide.

[0011] Preferably, the weight ratio of quartz sand, silicon powder and zinc oxide is 2-4:2-4:1-3.

[0012] Most preferably, the weight ratio of quartz sand, silica powder and zinc oxide is 3:3:2.

[0013] Preferably, the frosted filler is a modified frosted filler;

[0014] The modified frosted filler is prepared by the following method:

[0015] (1) quartz sand, silicon powder and zinc oxide are mixed, and then added into a silver nitrate solution and stirred to obtain a mixed solution;

[0016] (2) Add ascorbic acid solution to the mixed solution, stir for 1 to 3 hours, filter and separate the solid, and then dry to obtain the modified frosted filler.

[0017] In further research, the inventors found that adding a modified frosted filler obtained by modifying quartz sand, silica micropowder and zinc oxide by the above method to the frosted paint for glass can further improve the antibacterial effect of the frosted paint for glass compared to adding a frosted filler composed of quartz sand, silica micropowder and zinc oxide.

[0018] In addition, the inventors were surprised to find in the research that adding a modified frosted filler obtained by modifying quartz sand, silica micropowder and zinc oxide by the above method to the frosted paint for glass can significantly improve the adhesion of the frosted paint for glass on the glass surface, compared to adding a frosted filler composed of quartz sand, silica micropowder and zinc oxide.

[0019] Preferably, the weight ratio of quartz sand, silicon powder and zinc oxide is 2-4:2-4:1-3.

[0020] Most preferably, the weight ratio of quartz sand, silica powder and zinc oxide is 3:3:2.

[0021] Preferably, the ratio of the total weight of quartz sand, silicon powder and zinc oxide to the amount of silver nitrate solution and ascorbic acid solution is 1 kg: 5-15 L: 0.5-1.5 L.

[0022] Preferably, the total weight ratio of quartz sand, silicon powder and zinc oxide to the silver nitrate solution and ascorbic acid solution is 1 kg:10 L:1 L.

[0023] Preferably, the concentration of the silver nitrate solution is 0.05 to 0.15 mol / L.

[0024] Most preferably, the concentration of the silver nitrate solution is 0.1 mol / L.

[0025] Preferably, the concentration of the ascorbic acid solution is 0.5 to 1.5 mol / L.

[0026] Most preferably, the concentration of the ascorbic acid solution is 1 mol / L.

[0027] Preferably, the preparation method of the modified frosted filler further comprises the following steps:

[0028] The solid separated in step (2) is mixed with the modified liquid and stirred for 3 to 6 hours, and then dried to obtain the modified frosted filler.

[0029] Preferably, the usage ratio of the solid to the modifying liquid is 1 kg:1.5-2.5 L.

[0030] Most preferably, the ratio of the solid to the modifying liquid is 1 kg:2 L.

[0031] Preferably, the modified liquid is prepared by the following method: adding the modifier to water and stirring evenly to obtain the modified liquid; wherein the ratio of the modifier to water is 50-100 g:1 L.

[0032] Most preferably, the ratio of the modifier to water is 75g:1L.

[0033] Preferably, the modifier is selected from potassium perfluorobutanesulfonate or hexadecyltrimethylammonium bromide.

[0034] Preferably, the modifier consists of potassium perfluorobutanesulfonate and cetyltrimethylammonium bromide.

[0035] The inventors also surprisingly found in the study that adding modified frosted fillers further modified by the above-mentioned modifier to the frosted paint for glass can further improve the antibacterial effect of the frosted paint for glass and its adhesion to the glass surface compared to the frosted fillers not modified by the above-mentioned modifier.

[0036] The inventors have also discovered that the modifier of the present invention is crucial; adding a modified frosted filler modified with a modifier consisting of potassium perfluorobutanesulfonate and cetyltrimethylammonium bromide to a frosted coating for glass significantly improves the adhesion of the frosted coating to the glass surface compared to adding a modified frosted filler modified with a modifier consisting of potassium perfluorobutanesulfonate or cetyltrimethylammonium bromide alone. Adding a modified frosted filler modified with a modifier consisting of potassium perfluorobutanesulfonate and cetyltrimethylammonium bromide to a frosted coating for glass can synergistically improve the adhesion of the frosted coating to the glass surface.

[0037] Preferably, the weight ratio of potassium perfluorobutanesulfonate to cetyltrimethylammonium bromide is 1-3:1-3.

[0038] Most preferably, the weight ratio of potassium perfluorobutanesulfonate to cetyltrimethylammonium bromide is 1:1.

[0039] Preferably, the curing agent is selected from isocyanate curing agents.

[0040] Preferably, the curing agent is selected from isophorone diisocyanate.

[0041] The present invention also provides a method for preparing the frosted coating for glass, which comprises the following steps: uniformly mixing acrylic resin, frosted filler, curing agent and water to obtain the frosted coating for glass.

[0042] Beneficial effects: The present invention provides a frosted coating for glass with a new composition; studies have shown that the frosted coating for glass not only has antibacterial effects, but also has good adhesion; and has important application prospects.

[0043] In actual application, the frosted paint is directly sprayed or rolled on the glass surface. It has good stain resistance, good water resistance (the glass plate will not turn white or fall off after being soaked in water for more than 15 days) and matte effect. DETAILED DESCRIPTION

[0044] The present invention is further explained below with reference to specific examples, but the examples do not limit the present invention in any form.

[0045] The acrylic resin used in the following examples is a water-based self-crosslinking acrylic resin with the brand name RESIN HF-05A from Dow Chemical; the remaining raw materials whose sources are not specified are conventional raw materials that can be purchased by those skilled in the art through conventional purchasing channels.

[0046] Example 1 Preparation of frosted coating for glass

[0047] The raw materials are composed by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent (isophorone diisocyanate); and 52 parts of water.

[0048] The frosted filler consists of quartz sand, silicon powder and zinc oxide in a weight ratio of 3:3:2.

[0049] Preparation method: acrylic resin, frosted filler, curing agent and water are uniformly mixed to obtain the frosted paint for glass.

[0050] Example 2 Preparation of frosted coating for glass

[0051] The raw materials are composed by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent (isophorone diisocyanate); and 52 parts of water.

[0052] The frosted filler is a modified frosted filler; the modified frosted filler is prepared by the following method:

[0053] (1) quartz sand, silica powder and zinc oxide are mixed, and the mixture is added to a silver nitrate solution and stirred to obtain a mixed solution; wherein the weight ratio of quartz sand, silica powder and zinc oxide is 3:3:2;

[0054] (2) adding ascorbic acid solution to the mixed solution, stirring for 2 hours, filtering and separating the solid, and drying to obtain the modified frosted filler; wherein the total weight ratio of quartz sand, silicon micropowder and zinc oxide to the silver nitrate solution and ascorbic acid solution is 1kg:10L:1L; the concentration of the silver nitrate solution is 0.1mol / L; and the concentration of the ascorbic acid solution is 1mol / L.

[0055] Example 3 Preparation of frosted coating for glass

[0056] The raw materials are composed by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent (isophorone diisocyanate); and 52 parts of water.

[0057] The frosted filler is a modified frosted filler; the modified frosted filler is prepared by the following method:

[0058] (1) quartz sand, silica powder and zinc oxide are mixed, and the mixture is added to a silver nitrate solution and stirred to obtain a mixed solution; wherein the weight ratio of quartz sand, silica powder and zinc oxide is 3:3:2;

[0059] (2) adding ascorbic acid solution to the mixed solution, stirring for 2 hours, and then filtering to separate the solid; wherein the total weight ratio of quartz sand, silicon powder, and zinc oxide to the silver nitrate solution and ascorbic acid solution is 1 kg:10 L:1 L; the concentration of the silver nitrate solution is 0.1 mol / L; the concentration of the ascorbic acid solution is 1 mol / L;

[0060] (3) mixing the solid separated in step (2) with the modified liquid and stirring for 4 hours, and then drying to obtain the modified frosted filler; wherein the amount ratio of the solid to the modified liquid is 1 kg:2 L;

[0061] The modified liquid is prepared by the following method: adding a modifier to water and stirring evenly to obtain the modified liquid; wherein the ratio of the modifier to water is 75g:1L; and the modifier is potassium perfluorobutanesulfonate.

[0062] Example 4 Preparation of frosted coating for glass

[0063] The raw materials are composed by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent (isophorone diisocyanate); and 52 parts of water.

[0064] The frosted filler is a modified frosted filler; the modified frosted filler is prepared by the following method:

[0065] (1) quartz sand, silica powder and zinc oxide are mixed, and then added to a silver nitrate solution and stirred to obtain a mixed solution; wherein the weight ratio of quartz sand, silica powder and zinc oxide is 3:3:2;

[0066] (2) adding ascorbic acid solution to the mixed solution, stirring for 2 hours, and then filtering to separate the solid; wherein the total weight ratio of quartz sand, silicon powder, and zinc oxide to the silver nitrate solution and ascorbic acid solution is 1 kg:10 L:1 L; the concentration of the silver nitrate solution is 0.1 mol / L; the concentration of the ascorbic acid solution is 1 mol / L;

[0067] (3) mixing the solid separated in step (2) with the modified liquid and stirring for 4 hours, and then drying to obtain the modified frosted filler; wherein the amount ratio of the solid to the modified liquid is 1 kg:2 L;

[0068] The modified liquid is prepared by the following method: adding a modifier to water and stirring evenly to obtain the modified liquid; wherein the ratio of the modifier to water is 75g:1L; and the modifier is hexadecyltrimethylammonium bromide.

[0069] Example 5 Preparation of frosted coating for glass

[0070] The raw materials are composed by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent (isophorone diisocyanate); and 52 parts of water.

[0071] The frosted filler is a modified frosted filler; the modified frosted filler is prepared by the following method:

[0072] (1) quartz sand, silica powder and zinc oxide are mixed, and then added to a silver nitrate solution and stirred to obtain a mixed solution; wherein the weight ratio of quartz sand, silica powder and zinc oxide is 3:3:2;

[0073] (2) adding ascorbic acid solution to the mixed solution, stirring for 2 hours, and then filtering to separate the solid; wherein the total weight ratio of quartz sand, silicon powder, and zinc oxide to the silver nitrate solution and ascorbic acid solution is 1 kg:10 L:1 L; the concentration of the silver nitrate solution is 0.1 mol / L; the concentration of the ascorbic acid solution is 1 mol / L;

[0074] (3) mixing the solid separated in step (2) with the modified liquid and stirring for 4 hours, and then drying to obtain the modified frosted filler; wherein the amount ratio of the solid to the modified liquid is 1 kg:2 L;

[0075] The modified liquid is prepared by the following method: adding a modifier to water and stirring evenly to obtain the modified liquid; wherein the ratio of the modifier to water is 75g:1L; and the modifier is composed of potassium perfluorobutanesulfonate and hexadecyltrimethylammonium bromide in a weight ratio of 1:1.

[0076] The antibacterial rates of the frosted glass coatings prepared in Examples 1 to 5 against Staphylococcus aureus and Escherichia coli were tested with reference to the method in GB / T 21866-2008. The adhesion of the frosted glass coatings prepared in Examples 1 to 5 to the glass surface was tested with reference to the pull-off method in GB / T 5210-2006. The test results are shown in Table 1.

[0077] Table 1. Performance test results of the frosted coating for glass of the present invention

[0078]

[0079]

[0080] It can be seen from the experimental results in Table 1 that the frosted paint for glass prepared in Example 1 has a certain antibacterial rate against Staphylococcus aureus and Escherichia coli. This shows that the present invention can make the frosted paint for glass have certain antibacterial properties by adding a frosted filler composed of quartz sand, silica powder and zinc oxide to the frosted paint for glass.

[0081] It can be seen from the experimental results in Table 1 that the antibacterial rate of the frosted coating for glass prepared in Example 2 against Staphylococcus aureus and Escherichia coli is significantly higher than that in Example 1; this shows that adding the modified frosted filler obtained by modifying quartz sand, silica micropowder and zinc oxide by the method of the present invention to the frosted coating for glass can further significantly improve the antibacterial effect of the frosted coating for glass, compared with adding the frosted filler composed of quartz sand, silica micropowder and zinc oxide.

[0082] It can be seen from the experimental results in Table 1 that the antibacterial rates of the frosted coatings for glass prepared in Examples 3 to 5 against Staphylococcus aureus and Escherichia coli are further higher than that in Example 2; the modified frosted filler further modified by the modifier of the present invention is added to the frosted coating for glass. Compared with the frosted filler not modified by the modifier of the present invention, the antibacterial effect of the frosted coating for glass can be further improved.

[0083] As can be seen from the experimental results in Table 1, the adhesion of the frosted coating for glass prepared in Example 2 to the glass surface is significantly higher than that in Example 1; this indicates that adding the modified frosted filler obtained by modifying quartz sand, silica powder and zinc oxide by the method of the present invention to the frosted coating for glass can significantly improve the adhesion of the frosted coating for glass to the glass surface, compared to adding the frosted filler composed of quartz sand, silica powder and zinc oxide.

[0084] It can be seen from the experimental results in Table 1 that the adhesion of the frosted coatings for glass prepared in Examples 3 and 4 to the glass surface is further higher than that in Example 2; this indicates that the addition of the modified frosted filler further modified by the above-mentioned modifier to the frosted coating for glass can further improve the adhesion of the frosted coating for glass to the glass surface, compared with the frosted filler not modified by the above-mentioned modifier.

[0085] As can be seen from the experimental results in Table 1, the adhesion of the frosted glass coating prepared in Example 5 to the glass surface is significantly higher than that of Example 2, and also significantly higher than that of Examples 3 and 4. This indicates that the modified frosted filler obtained by adding a modifier composed of potassium perfluorobutanesulfonate and cetyltrimethylammonium bromide to the frosted glass coating significantly improves the adhesion of the frosted glass coating to the glass surface compared to the modified frosted filler obtained by adding a modifier composed of potassium perfluorobutanesulfonate or cetyltrimethylammonium bromide alone. Adding a modified frosted filler obtained by adding a modifier composed of potassium perfluorobutanesulfonate and cetyltrimethylammonium bromide to the frosted glass coating can synergistically improve the adhesion of the frosted glass coating to the glass surface.

Claims

1. A frosted coating for glass, characterized in that: The invention comprises the following components in parts by weight: 50 to 70 parts of acrylic resin; 20 to 30 parts of frosted filler; 1 to 5 parts of curing agent; and 40 to 60 parts of water.

2. The frosted coating for glass according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 60-70 parts of acrylic resin; 20-25 parts of frosted filler; 1-3 parts of curing agent; and 50-60 parts of water.

3. The frosted coating for glass according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 65 parts of acrylic resin; 25 parts of frosted filler; 3 parts of curing agent; and 52 parts of water.

4. The frosted paint for glass according to claim 1, characterized in that: The frosted filler comprises quartz sand, silicon powder and zinc oxide.

5. The frosted paint for glass according to claim 4, characterized in that: The frosted filler is a modified frosted filler; The modified frosted filler is prepared by the following method: (1) quartz sand, silicon powder and zinc oxide are mixed, and then added into a silver nitrate solution and stirred to obtain a mixed solution; (2) Add ascorbic acid solution to the mixed solution, stir for 1 to 3 hours, filter and separate the solid, and then dry to obtain the modified frosted filler.

6. The frosted paint for glass according to claim 5, characterized in that: The usage ratio of the total weight of quartz sand, silicon micropowder and zinc oxide to the silver nitrate solution and ascorbic acid solution is 1kg:5-15L:0.5-1.5L.

7. The frosted paint for glass according to claim 5, characterized in that: The concentration of the silver nitrate solution is 0.05-0.15 mol / L.

8. The frosted paint for glass according to claim 5, characterized in that: The concentration of the ascorbic acid solution is 0.5-1.5 mol / L.

9. The frosted coating for glass according to claim 1, characterized in that: The curing agent is selected from isocyanate curing agents.

10. The method for preparing the frosted coating for glass according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: uniformly mixing acrylic resin, frosted filler, curing agent and water to obtain the frosted paint for glass.

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