Waterborne organic-inorganic high-performance coating, and preparation method therefor and use thereof

Abstract

A waterborne organic-inorganic high-performance coating, comprising the following raw materials: 50-60 wt% of a polysiloxane acrylic resin emulsion, 8-20 wt% of a coloring pigment, 5-10 wt% of a functional filler, 1-2 wt% of an ultraviolet absorber, 0.5-1 wt% of a light stabilizer, 1-2 wt% of a dispersing agent, 0.3-0.5 wt% of a defoaming agent, 3-5 wt% of a coalescing agent, 0.3-0.5 wt% of a wetting agent, 0.3-0.5 wt% of a thickening agent, 0.1-0.3 wt% of a pH value regulator, 0.1-0.2 wt% of a sterilizing agent, and the balance of water. The coating is used for replacing a traditional fluorine coating, is environmentally friendly, and has a low VOC content and good weather resistance, self-cleaning effect and antimicrobial properties; and when in use, the coating has the double characteristics of long-term action and visual attractiveness, and can retain its color and gloss for a long period of time.

Description

A water-based organic and inorganic high-performance coating and its preparation method and application Technical Field

[0001] The present invention relates to the technical field of water-based functional coatings, and in particular to a water-based organic and inorganic high-performance coating. The present invention also relates to a preparation method and application of the water-based organic and inorganic high-performance coating. Background Art

[0002] Buildings and bridges require not only excellent durability but also excellent resistance to pollution from airborne particulate matter. Numerous long-lasting, weather-resistant coatings are currently available, most of which are oil-based polysiloxanes or water-based fluorocarbon coatings. Traditional high-weather-resistant coatings based on fluororesins are widely used, but they suffer from several drawbacks in specific applications. Firstly, their resistance to pollution cannot meet the application requirements. Secondly, the use of fluorinated compounds poses significant environmental risks, with excessive VOC levels. Furthermore, restrictions on their use are becoming increasingly stringent.

[0003] For example, the highly weather-resistant fluorocarbon coating and preparation method disclosed in patent CN201910797886.X uses solvent-based fluorocarbon coating, which is very harmful to the environment, seriously exceeds the VOC standard, and does not meet current environmental protection requirements; for example, the self-cleaning high-hardness coating and preparation method disclosed in patent document CN202310828545.0 is achieved by modifying polyacrylic resin and compounding raw materials to achieve hydrophobic and stain-resistant effects. Its raw material composition is complex and the cost is relatively high.

[0004] The present invention has developed a water-based organic-inorganic composite antibacterial, self-cleaning, and long-lasting weather-resistant coating. This coating utilizes an organic-inorganic composite resin system to form an organic-inorganic composite coating with the excellent performance of maintaining its aesthetic appearance for a long time without maintenance. This meets the requirements for long-term protection and aesthetic maintenance of coated objects, reduces maintenance costs, and addresses the current solvent usage restrictions of weather-resistant coatings and the requirements of various applications and substrates such as the coating environment. This composite resin system coating forms a nanoscale, uniformly dispersed composite resin film, resulting in significantly superior weather resistance compared to ordinary resin coatings. Due to the hydrophilicity of the coating surface, it has a self-cleaning effect similar to rainwater washing away dirt, which can exert its excellent pollution resistance. Furthermore, because the coating film contains polysiloxane bonds that are not easily decomposed by oxidation or light, it can generate free radicals on the surface, achieving antiviral and antibacterial uses.

[0005] Summary of the Invention

[0006] To address the problems existing in the above-mentioned background technology, the present invention provides a water-based organic and inorganic high-performance coating, which is used to replace traditional fluorine coatings. It is environmentally friendly and low-VOC, and has excellent weather resistance, self-cleaning effects, and antibacterial properties. When used, it has the dual characteristics of long-lasting effectiveness and aesthetics, can maintain color and gloss for a long time, and when used as part of a high-performance weather-resistant coating system, it has a long service life before the first maintenance. In addition, the present invention also provides a method for preparing the above-mentioned water-based organic and inorganic high-performance coating, and its application in market areas where visual effects are important and aesthetic requirements are high, specifically, application in high-performance structures, high-performance equipment, etc., as well as ordinary industrial and commercial steel structures and exterior walls where aesthetics are very critical.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] In a first aspect of the present invention, a water-based organic and inorganic high-performance coating is provided, comprising the following raw materials:

[0009] Polysiloxane acrylic resin emulsion 50-60wt%,

[0010] Coloring pigment 8-20wt%,

[0011] Functional filler 5-10wt%,

[0012] UV absorber 1-2 wt%,

[0013] Light stabilizer 0.5~1wt%,

[0014] Dispersant 1-2 wt%,

[0015] Defoaming agent 0.3~0.5wt%,

[0016] Film-forming aid 3-5wt%,

[0017] Wetting agent 0.3~0.5wt%,

[0018] Thickener 0.3~0.5wt%,

[0019] pH regulator 0.1-0.3 wt%,

[0020] Bactericide 0.1~0.2wt%,

[0021] The balance is water.

[0022] Using the above technical solution:

[0023] The coating product system of the present application adds a polysiloxane acrylic resin emulsion, which is an organic-inorganic composite resin system in which polysiloxane is uniformly dispersed at the nanometer level in acrylic resin. Compared with other common resin systems, its weather resistance is significantly superior. Due to the hydrophilicity of the resin surface, the formed coating film has a self-cleaning effect of rainwater washing away dirt, and can exert its excellent pollution resistance. In addition, since the system contains polysiloxane bonds that are not easily oxidized and decomposed by light, free radicals can be generated on the surface of the coating film, achieving the purpose of antiviral and antibacterial agents.

[0024] This water-based, organic-inorganic, high-performance coating is an environmentally friendly, low-VOC coating product with excellent weather resistance, self-cleaning properties, and antimicrobial properties. It offers both long-lasting and aesthetically pleasing properties, maintaining its color and gloss over time. When used as part of a high-performance weather-resistant coating system, it boasts a long service life before the first repair. The longevity stems from the product's high weather resistance, self-cleaning, and antimicrobial properties, while its aesthetic appeal stems from the high surface performance of the siloxane. This coating product can be used in markets where visual effects and aesthetics are paramount, specifically for coating high-performance structures and equipment, as well as for coating standard industrial and commercial steel structures and exterior walls, where aesthetics are crucial.

[0025] The polysiloxane acrylic resin emulsion is an organic-inorganic hybrid emulsion, specifically, it is compounded by 1 part by weight of polysiloxane resin and 9 parts by weight of acrylic resin.

[0026] Specifically, the polysiloxane resin is prepared by polycondensation of γ-methacryloxypropyltrimethoxysilane under the action of a catalyst.

[0027] The coloring pigment is a mixture of one or more pigments such as titanium dioxide, black iron oxide, carbon black, yellow iron oxide, and phthalocyanine blue.

[0028] Wherein, the functional filler is a mixture of one or more of glass microbeads, ceramic microbeads, and aluminum-silver paste.

[0029] Wherein, the ultraviolet absorber is a mixture of one or more triazines and benzotriazoles.

[0030] Wherein, the light stabilizer is a hindered amine light stabilizer.

[0031] The film-forming aid is a mixture of one or more of alcohol ester-12, dipropylene glycol methyl ether, dipropylene glycol butyl ether, propylene glycol methyl ether, propylene glycol butyl ether, and ethylene glycol butyl ether.

[0032] Wherein, the dispersant is a nonionic maleic anhydride and styrene copolymer dispersant.

[0033] Wherein, the defoaming agent is a silicone defoaming agent.

[0034] Wherein, the wetting agent is one or a mixture of acetylenediol and silicone wetting agents.

[0035] Wherein, the thickener is a polyurethane thickener.

[0036] Wherein, the bactericide is a CMI / MI type bactericide and mildew preventer.

[0037] Wherein, the pH regulator is AMP95.

[0038] The second aspect of the present invention provides a method for preparing the above-mentioned water-based organic and inorganic high-performance coating, comprising the following steps:

[0039] S1. Add water, dispersant, defoamer, and coloring pigment in sequence while stirring at a speed of 700-900 rpm, stir and disperse evenly, and then sand grind to obtain a sand-grinded slurry with a scraper fineness of ≤30 μm;

[0040] S2. Add the polysiloxane acrylic resin emulsion to the container, slowly add the film-forming aid thereto while stirring at a speed of 700-900 rpm, and stir and disperse for more than 10 minutes;

[0041] S3. Slowly add the functional filler into the container while stirring at a speed of 700-900 rpm and continue stirring and dispersing for more than 15 minutes;

[0042] S4, then add the sand grinding slurry obtained in step S1 into the container in sequence, add defoamer, and add wetting agent, ultraviolet absorber, light stabilizer, and fungicide and stir evenly;

[0043] S5, adding a pH adjuster to the container to adjust the pH value to greater than 8.0, and then adding a thickener to adjust to a predetermined viscosity;

[0044] S6. After passing the inspection, the product is filtered and packaged to obtain the finished product.

[0045] The third aspect of the present invention provides an application of the above-mentioned water-based organic and inorganic high-performance coating, which can be used for coating high-performance structures, high-performance equipment, as well as coating ordinary industrial and commercial structures and exterior walls where aesthetics is very critical.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] (1) The coating product system of the present invention includes a polysiloxane acrylic resin emulsion, which is an organic-inorganic composite resin system in which polysiloxane is uniformly dispersed at the nanometer level in acrylic resin. Compared with other common resin systems, its weather resistance is significantly superior. Due to the hydrophilicity of the resin surface, the formed coating film has a self-cleaning effect that allows rainwater to wash away dirt, thereby exerting its excellent pollution resistance. In addition, since the system contains polysiloxane bonds that are not easily oxidized or photodecomposed, free radicals can be generated on the surface of the coating film, achieving the purpose of antiviral and antibacterial agents.

[0048] (2) This water-based organic and inorganic high-performance coating is an environmentally friendly, low-VOC coating product with excellent weather resistance, self-cleaning properties, and antibacterial properties. When used, it has both long-lasting and aesthetically pleasing properties, maintaining color and gloss for a long time. When used as part of a high-performance weather-resistant coating system, it has a long service life before the first repair. The long-lasting property comes from the product's high weather resistance, self-cleaning, and antibacterial properties, while the aesthetics come from the high surface performance of the silicone. This coating product can be used in market areas where visual effects are important and aesthetics are high. Specifically, it can be applied to the coating of high-performance structures, high-performance equipment, etc., as well as the coating of ordinary industrial and commercial steel structures and exterior walls where aesthetics are very critical. DETAILED DESCRIPTION

[0049] In order to facilitate understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0050] Unless otherwise defined, all technical terms used hereinafter have the same meanings as those generally understood by those skilled in the art. The technical terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present invention.

[0051] Unless otherwise specified, all reagents and raw materials used in the present invention are commercially available products or products that can be prepared by known methods.

[0052] Example 1

[0053] Water-based organic and inorganic high-performance coatings are composed of the following raw materials:

[0054] Polysiloxane acrylic resin emulsion: 50wt%,

[0055] Titanium dioxide: 16wt%,

[0056] Glass beads: 8wt%,

[0057] 1130:1wt%,

[0058] 292: 0.5wt%,

[0059] BYK190: 1.5wt%,

[0060] BYK024: 0.3wt%,

[0061] Alcohol-12: 3wt%,

[0062] BYK346: 0.3wt%,

[0063] PUR 64: 0.3wt%,

[0064] Parmetol DF35: 0.1wt%,

[0065] AMP95: 0.2wt%,

[0066] Water: 18.8wt%.

[0067] The preparation process of the water-based organic and inorganic high-performance coating is as follows:

[0068] S1. Add water, BYK190, BYK024, and titanium dioxide in sequence while stirring at a speed of 700 rpm and stir and disperse for 15 minutes.

[0069] S2, sand-grinding the mixture uniformly dispersed in step S1 to obtain a sand-grinded slurry, with a scraper fineness of ≤30 μm;

[0070] S3. Add polysiloxane acrylic resin emulsion into the container, slowly add film-forming aid alcohol ester-12 while stirring at a speed of 700 rpm, and stir and disperse for 10 minutes;

[0071] S4. Slowly add glass beads while stirring at 700 rpm and continue stirring and dispersing for 15 minutes;

[0072] S5, then add the sand grinding slurry obtained in step S2, add BYK024, and add BYK346, 1130, 292, Parmetol DF35 stirred for 15 minutes;

[0073] S6. Add pH adjuster AMP95 to the container to adjust the pH value to greater than 8.0, and then add thickener PUR64 to adjust to a predetermined viscosity;

[0074] S7. After passing the inspection, the product is filtered and packaged to obtain the finished product.

[0075] Example 2

[0076] Water-based organic and inorganic high-performance coatings are composed of the following raw materials:

[0077] Polysiloxane acrylic resin emulsion: 50%,

[0078] Titanium dioxide: 15%,

[0079] Ceramic micro beads: 10%,

[0080] 1130:1%,

[0081] 292: 0.5%,

[0082] BYK190: 1.5%,

[0083] BYK024: 0.3%,

[0084] Alcohol-12:1%,

[0085] Dipropylene glycol butyl ether: 2%,

[0086] BYK346: 0.3%,

[0087] PUR 64: 0.3%,

[0088] Parmetol DF35: 0.1%,

[0089] AMP95: 0.2%,

[0090] Water: 17.8%.

[0091] The preparation process of the water-based organic and inorganic high-performance coating is as follows:

[0092] S1. Add water, BYK190, BYK024, and titanium dioxide in sequence while stirring at 800 rpm and disperse for 15 minutes.

[0093] S2, sand-grinding the mixture uniformly dispersed in step S1 to obtain a sand-grinded slurry, with a scraper fineness of ≤30 μm;

[0094] S3. Add polysiloxane acrylic resin emulsion to the container, slowly add film-forming aids alcohol ester-12 and dipropylene glycol butyl ether while stirring at a speed of 800 rpm, and stir and disperse for 10 minutes;

[0095] S4. Slowly add ceramic microbeads while stirring at 800 rpm and continue stirring and dispersing for 15 minutes.

[0096] S5, then add the sand grinding slurry obtained in step S2, add BYK024, and add BYK346, 1130, 292, Parmetol DF35 stirred for 15 minutes;

[0097] S6. Add pH adjuster AMP95 to the container to adjust the pH value to greater than 8.0, and then add thickener PUR64 to adjust to a predetermined viscosity;

[0098] S7. After passing the inspection, the product is filtered and packaged to obtain the finished product.

[0099] Example 3

[0100] Water-based organic and inorganic high-performance coatings are composed of the following raw materials:

[0101] Polysiloxane acrylic resin emulsion: 60%,

[0102] Phthalocyanine blue: 8%,

[0103] Aluminum silver paste: 8%,

[0104] 1130:1%,

[0105] 292: 0.5%

[0106] BYK190: 2%,

[0107] BYK024: 0.3%,

[0108] Alcohol-12:1%,

[0109] Dipropylene glycol butyl ether: 2%,

[0110] BYK346: 0.3%,

[0111] PUR 64: 0.3%,

[0112] Parmetol DF35: 0.1%,

[0113] AMP95: 0.3%,

[0114] Water: 16.2%.

[0115] The preparation process of the water-based organic and inorganic high-performance coating is as follows:

[0116] S1. Add water, BYK190, BYK024, and Phthalocyanine Blue in sequence while stirring at 900 rpm and disperse for 15 minutes.

[0117] S2, sand-grinding the mixture uniformly dispersed in step S1 to obtain a sand-grinded slurry, with a scraper fineness of ≤30 μm;

[0118] S3. Add polysiloxane acrylic resin emulsion to the container, slowly add film-forming aids alcohol ester-12 and dipropylene glycol butyl ether while stirring at a speed of 900 rpm, and stir and disperse for 10 minutes;

[0119] S4. Slowly add aluminum-silver paste while stirring at 900 rpm and continue stirring and dispersing for 15 minutes;

[0120] S5, then add the sand grinding slurry obtained in step S2, add BYK024, and add BYK346, 1130, 292, Parmetol DF35 stirred for 15 minutes;

[0121] S6. Add pH adjuster AMP95 to the container to adjust the pH value to greater than 8.0, and then add thickener PUR64 to adjust to a predetermined viscosity;

[0122] S7. After passing the inspection, the product is filtered and packaged to obtain the finished product.

[0123] Example 4

[0124] Water-based organic and inorganic high-performance coatings are composed of the following raw materials:

[0125] Polysiloxane acrylic resin emulsion: 50wt%,

[0126] Titanium dioxide: 20wt%,

[0127] Glass beads: 5wt%,

[0128] 1130: 2wt%,

[0129] 292:1wt%,

[0130] BYK190: 1wt%,

[0131] Defoamer BYK024: 0.5wt%,

[0132] Alcohol-12: 2%,

[0133] Dipropylene glycol butyl ether: 3%,

[0134] BYK346: 0.5wt%,

[0135] PUR 64: 0.5wt%,

[0136] Parmetol DF35: 0.2wt%,

[0137] AMP95: 0.1wt%,

[0138] Water: 14.2 wt%.

[0139] The preparation process of the water-based organic and inorganic high-performance coating is as follows:

[0140] S1. Add water, BYK190, BYK024, and titanium dioxide in sequence while stirring at 800 rpm and disperse for 15 minutes.

[0141] S2, sand-grinding the mixture uniformly dispersed in step S1 to obtain a sand-grinded slurry, with a scraper fineness of ≤30 μm;

[0142] S3. Add polysiloxane acrylic resin emulsion to the container, slowly add film-forming aids alcohol ester-12 and dipropylene glycol butyl ether while stirring at a speed of 800 rpm, and stir and disperse for 10 minutes;

[0143] S4. Slowly add glass beads while stirring at 800 rpm and continue stirring and dispersing for 15 minutes;

[0144] S5, then add the sand grinding slurry obtained in step S2, add BYK024, and add BYK346, 1130, 292, Parmetol DF35 stirred for 15 minutes;

[0145] S6. Add pH adjuster AMP95 to the container to adjust the pH value to greater than 8.0, and then add thickener PUR64 to adjust to a predetermined viscosity;

[0146] S7. After passing the inspection, the product is filtered and packaged to obtain the finished product.

[0147] The coating products prepared in Examples 1-4 were subjected to performance testing, and the test results are shown in Table 1.

[0148] Table 1

[0149] As can be seen from the test results in Table 1, the coating product prepared in the present invention has excellent weather resistance, self-cleaning effect and antibacterial properties. When used, it has the dual characteristics of long-term effectiveness and aesthetics, and can maintain color and gloss for a long time. The final aging test performance of Example 4 can reach 3000h, but the market price / performance ratio is slightly low. This coating product can be used in market areas where visual effects are important and aesthetics are high. Specifically, it can be applied to the coating of high-performance structures, high-performance equipment, etc., as well as the coating of ordinary industrial and commercial steel structures and exterior walls where aesthetics are very critical.

Claims

1. A water-based organic and inorganic high-performance coating, characterized in that: It is composed of the following raw materials: Polysiloxane acrylic resin emulsion 50-60wt%, Coloring pigment 8-20wt%, Functional filler 5-10wt%, UV absorber 1-2 wt%, Light stabilizer 0.5~1wt%, Dispersant 1-2 wt%, Defoaming agent 0.3~0.5wt%, Film-forming aid 3-5wt%, Wetting agent 0.3~0.5wt%, Thickener 0.3~0.5wt%, pH regulator 0.1-0.3 wt%, Bactericide 0.1~0.2wt%, The balance is water.

2. The water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The polysiloxane acrylic resin emulsion is compounded by polysiloxane resin and acrylic resin.

3. The water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The coloring pigment is a mixture of one or more pigments such as titanium dioxide, black iron oxide, carbon black, yellow iron oxide, and phthalocyanine blue.

4. The water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The functional filler is a mixture of one or more of glass microbeads, ceramic microbeads, and aluminum-silver paste.

5. The water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The ultraviolet absorber is a mixture of one or more triazines and benzotriazoles.

6. The water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The light stabilizer is a hindered amine light stabilizer.

7. The water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The film-forming aid is a mixture of one or more of alcohol ester-12, dipropylene glycol methyl ether, dipropylene glycol butyl ether, propylene glycol methyl ether, propylene glycol butyl ether, and ethylene glycol butyl ether.

8. A method for preparing a water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The steps include: S1, adding water, dispersant, defoamer, and coloring pigment in sequence, stirring and dispersing them uniformly, and then sand-milling to obtain a sand-milled slurry; S2, add polysiloxane acrylic resin emulsion into the container, and slowly add film-forming aid into it while stirring, Stir and disperse evenly; S3. Slowly add the functional filler into the container and continue stirring and dispersing; S4, then add the sand grinding slurry obtained in step S1 into the container in sequence, add defoamer, and add wetting agent, ultraviolet absorber, light stabilizer, and fungicide and stir evenly; S5, adding a pH adjuster to the container to adjust the pH value to greater than 8.0, and then adding a thickener to adjust to a predetermined viscosity; S6. After passing the inspection, the product is filtered and packaged to obtain the finished product.

9. A use of the water-based organic and inorganic high-performance coating according to claim 1, characterized in that: The coating can be used for coating high-performance structures and high-performance equipment, as well as for coating general industrial and commercial structures and exterior walls where aesthetics are critical.