A water-based wear-resistant and antibacterial floor decorative coating and preparation method thereof

Abstract

The present invention provides a water-based wear-resistant and antibacterial floor decorative coating, comprising the following raw materials and their percentages by weight: 50%-60% hydroxy acrylic resin, 10%-20% curing agent, 5%-10% color paste, 3%-10% film-forming aid, 2%-7% polyurethane microbeads, 0.2%-0.8% thixotropic agent, 0.1%-0.8% antistatic slurry, 0.5%-2% antibacterial agent, 0.05%-0.4% defoaming agent, 0.05%-0.4% leveling agent, and 3%-20% water. The present invention belongs to the technical field of coatings, and the water-based wear-resistant and antibacterial floor decorative coating provided by the present invention has excellent properties such as wear resistance, antibacterial, antistatic, and weather resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of coatings, and in particular relates to a water-based wear-resistant and antibacterial floor decorative coating and a preparation method thereof. Background Art

[0002] With the development of modern industry and the improvement of people's living standards, floor coatings have become an indispensable material for floor decoration. The resins used in floor coatings mainly include epoxy, polyurethane, and polyurea. Floor coatings prepared from these three resins can be divided into three forms: solvent-free, solvent-based, and water-based to meet different usage and performance requirements. Epoxy resin floor coating is currently the most popular and technologically mature coating system. It has the advantages of high strength, excellent chemical resistance, and beautiful and durable paint film. However, epoxy resin cannot be used in occasions with high weather resistance requirements because the epoxy chain of the resin itself is easily broken under ultraviolet radiation. In contrast, polyurea resin has excellent weather resistance and can meet high-performance weather resistance requirements, but it has the disadvantage of being less strong than epoxy resin and polyurethane resin, which limits its use to occasions where the strength requirements of floor coatings are not high. The polyurethane resin system combines the advantages of epoxy resin and polyurea resin and can meet all aspects of high strength and weather and chemical resistance requirements.

[0003] Traditional polyurethane systems, whether solvent-based or solvent-free, suffer from rapid curing speeds and short pot lifespans, placing stringent requirements on construction environments and significantly limiting their application. Waterborne polyurethane, on the other hand, combines the inherent strength and excellent weather and chemical resistance of polyurethane systems with a longer pot life and less demanding construction environments. Furthermore, waterborne polyurethane floor coatings are virtually zero-VOC, offer a wide range of film thickness options, and can achieve Class A fire ratings, promising broad application prospects. Chinese patent application CN109456690A discloses a waterborne polyurethane super-wear-resistant topcoat, comprising component A and component B in a weight ratio of (4-6):1. Component A comprises the following raw materials, in parts by weight: 50-60 parts of waterborne polyurethane resin AH-1618; 12-18 parts of polyurethane color paste; 0.8-1.2 parts of leveling agent BYK346; 0.3-0.5 parts of waterborne leveling agent BYK333; 0.3-0.6 parts of polyurethane rheological agent SN612NC; 0.3-0.5 parts of defoaming agent BYK024; and degassing agent Tego901W. 0.08-0.1 parts; 0.8-1.5 parts of rutile titanium dioxide; 8-10 parts of wear-resistant ball powder; 0.8-1.5 parts of water-based anti-scratch agent; 1.2-1.6 parts of propylene glycol methyl ether; 12-18 parts of deionized water; the composition of component B includes the following raw materials: 95-100 parts of polyurethane curing agent; the wear-resistant ball powder and the water-based anti-scratch agent are used in combination to enhance the hardness and smooth wear resistance of the water-based polyurethane super wear-resistant topcoat after curing and molding, but the amount of wear-resistant ball powder is large, and the alumina and quartz powder have a fast sinking speed due to their large specific gravity, which makes it easy for them to have problems of stratification and sedimentation, and it is easy for them to have problems of mold and bacteria breeding. Summary of the Invention

[0004] To address the problems existing in the prior art, the inventors conducted extensive experiments to screen and compound raw materials for decorative coatings. They unexpectedly discovered that using a hydroxy acrylate resin and an isocyanate curing agent as the backbone of the decorative coating formula imparts weather resistance and physicochemical properties to the coating. The use of polyurethane microbeads as a wear-resistant powder, with its relatively low dosage and specific gravity, not only provides excellent wear resistance but also allows for significant adjustment in the formulation. Furthermore, the addition of an antimicrobial agent, an antistatic slurry, and a film-forming aid improves the compatibility of the components, resulting in a water-based, wear-resistant, and antimicrobial floor decorative coating that simultaneously possesses excellent properties such as wear resistance, antimicrobial properties, antistatic properties, and weather resistance, while also facilitating application. Based on these findings, the present invention was completed.

[0005] The purpose of the present invention will be further reflected and explained through the following detailed description.

[0006] The present invention provides a water-based wear-resistant and antibacterial floor decorative coating, which comprises the following raw materials and their mass percentages: 50%-60% of hydroxy acrylic resin, 10%-20% of curing agent, 5%-10% of color paste, 3%-10% of film-forming auxiliary agent, 2%-7% of polyurethane microbeads, 0.2%-0.8% of thixotropic auxiliary agent, 0.1%-0.8% of antistatic slurry, 0.5%-2% of antibacterial agent, 0.05%-0.4% of defoaming agent, 0.05%-0.4% of leveling agent, and 3%-20% of water.

[0007] The combination of the above-mentioned raw materials and their mass percentage ranges were determined by the inventors through a large number of experiments. Using the above-mentioned technical solution, the water-based wear-resistant and antibacterial floor decorative coating provided by the present invention uses polyurethane microspheres as wear-resistant powder, which has a soft and comfortable touch and does not have the disadvantage of a large specific gravity of inorganic wear-resistant powder, thereby avoiding the problem of easy stratification and sedimentation and uneven distribution of inorganic powder; in addition, hydroxy acrylate resin and isocyanate curing agent are used as the skeleton of the decorative coating formula, which has good compatibility with the added antibacterial agent, antistatic slurry and film-forming aid, so that the water-based wear-resistant and antibacterial floor decorative coating has excellent properties such as wear resistance, antibacterial, antistatic and weather resistance. When using the water-based wear-resistant and antibacterial floor decorative coating provided by the present invention, the curing agent is added to the color paint made from other raw materials, mixed evenly, and the water-based wear-resistant and antibacterial floor decorative coating is obtained. Usage: Scrape with a flat scraper, then roll evenly with a wool roller, the amount used is 0.08-0.1 kg / m2.

[0008] Preferably, the water-based wear-resistant and antibacterial floor decorative coating includes the following raw materials and their mass percentages: 52%-58% of hydroxy acrylic resin, 12%-18% of curing agent, 6%-8% of color paste, 4%-8% of film-forming aid, 3%-6% of polyurethane microbeads, 0.3%-0.6% of thixotropic agent, 0.2%-0.5% of antistatic slurry, 0.5%-2% of antibacterial agent, 0.05%-0.4% of defoaming agent, 0.05%-0.4% of leveling agent, and 4%-18% of water.

[0009] More preferably, the water-based wear-resistant and antibacterial floor decorative coating includes the following raw materials and their mass percentages: 55% hydroxy acrylic resin, 16% curing agent, 7% color paste, 6.4% film-forming agent, 6% polyurethane microbeads, 0.4% thixotropic agent, 0.2% antistatic slurry, 0.5% antibacterial agent, 0.2% defoaming agent, 0.3% leveling agent, and 8% water.

[0010] More preferably, the water-based wear-resistant and antibacterial floor decorative coating includes the following raw materials and their mass percentages: 52% hydroxy acrylic resin, 15% curing agent, 7% color paste, 4% film-forming agent, 5% polyurethane microbeads, 0.6% thixotropic agent, 0.2% antistatic slurry, 1% antibacterial agent, 0.4% defoaming agent, 0.4% leveling agent, and 14.4% water.

[0011] Preferably, the curing agent is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI). More preferably, the curing agent is a diisocyanate trimer.

[0012] Preferably, the polyurethane microbeads have a particle size range of 5-15 μm. More preferably, the polyurethane microbeads are purchased from Lamberti, Italy, and have a particle size range of 5-8 μm.

[0013] Preferably, the types of hydroxy acrylic resin include SETAQUA-6515, SETAQUA-6826, Bayhydrol XP2542 and Bayhydrol XP2645.

[0014] Preferably, the film-forming aid is selected from one or more of dipropylene glycol methyl ether (DPM), dipropylene glycol butyl ether (DPNB) and propylene glycol methyl ether acetate (PMA); the leveling agent is selected from one or more of AFCONA3580, AFCONA3590, BYK354, BYK349, BYK346, TEGO450 and TEGO4100; the defoaming agent is selected from one or more of TEGO901W, TEGO902W, BYK012, BYK024, AFCONA2590 and AFCONA2507.

[0015] Preferably, the antibacterial agent is nanopowder zinc oxide.

[0016] Preferably, the color paste is a water-based nano-color paste, the antistatic slurry is a single-walled carbon nanotube water-based slurry, and the thixotropic additive is BASF Rheovis PU1291.

[0017] In addition, the present invention also provides a method for preparing the water-based wear-resistant and antibacterial floor decorative coating, comprising the following steps:

[0018] 1) adding a hydroxy acrylic resin into a dispersing mixer, and sequentially adding a film-forming agent, a defoaming agent, a leveling agent, and a thixotropic agent at a stirring speed of 180 to 800 r / min, and mixing them uniformly to obtain a mixed solution;

[0019] 2) adding the color paste, conductive paste, polyurethane microbeads, antibacterial agent and water to the mixed solution respectively, and mixing them uniformly at a stirring speed of 400 to 800 r / min to obtain a colored paint;

[0020] 3) When in use, add the curing agent to the paint and mix evenly to obtain a water-based wear-resistant and antibacterial floor decorative coating.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The water-based wear-resistant and antibacterial floor decorative coating provided by the present invention uses polyurethane microspheres as wear-resistant powder, which has a soft and comfortable touch and does not have the disadvantage of a large specific gravity of inorganic wear-resistant powder, thereby avoiding the problem of easy stratification and sedimentation and uneven distribution of inorganic powder; in addition, hydroxy acrylate resin and isocyanate curing agent are used as the skeleton of the decorative coating formula, which has good compatibility with the added antibacterial agent, antistatic slurry and film-forming auxiliary agent, so that the water-based wear-resistant and antibacterial floor decorative coating has excellent properties such as wear resistance, antibacterial, antistatic and weather resistance, is easy to construct, can meet Class A fire protection requirements, and can also be competent for high-requirement environments such as hospitals and food factories that require sterility, and has a wide range of applications.

[0023] (2) The water-based wear-resistant and antibacterial floor decorative coating provided by the present invention has a moderate viscosity before curing (350-750 mPa.s). The surface of the floor paint film formed by curing has a frosted effect, high surface uniformity, small difference in surface gloss in different areas, and a gloss of about 15 degrees. It is hard and wear-resistant, pressure-resistant and impact-resistant, and has good corrosion resistance. It can play a long-term protective role, has a long service life, and has a low VOC content, which is in line with the concept of environmental protection.

[0024] (3) The preparation method of the water-based wear-resistant and antibacterial floor decorative coating provided by the present invention is simple, and the prepared water-based wear-resistant and antibacterial floor decorative coating has stable quality and excellent performance. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below through specific examples.

[0026] Unless otherwise specified, the test methods used in this invention are all conventional methods in the industry. The raw materials used, unless otherwise specified, can be obtained from commercial sources or conventional methods. For example, polyurethane microbeads were purchased from Lamberti Group under the product number F-AV; diisocyanate trimer was purchased from Covestro under the product number Bayhydur 2655; thixotropic agent was purchased from BASF under the product number BASF Rheovis PU1291; water-based nano-color paste was purchased from Guangzhou Panyu Kedi Color Co., Ltd.; and antibacterial agent was purchased from the Guangdong-Hong Kong-Macao Greater Bay Area National Nanotechnology Innovation Institute under the product number ABM-202.

[0027] Example 1 Water-based wear-resistant and antibacterial floor decorative coating

[0028] This water-based, wear-resistant, and antibacterial floor decorative coating comprises the following raw materials, in percentage by weight: 55% hydroxylated acrylic resin, 16% curing agent, 7% colorant, 6.4% film-forming agent, 6% polyurethane microbeads, 0.4% thixotropic agent, 0.2% antistatic slurry, 0.5% antimicrobial agent, 0.2% defoamer, 0.3% leveling agent, and 8% water. The hydroxylated acrylic resin is Bayhydrol XP2542, the curing agent is a diisocyanate trimer, the thixotropic agent is BASF Rheovis PU1291, the colorant is a water-based nano-colorant, the polyurethane microbeads have a particle size range of 5-8 μm, the antistatic slurry is a water-based slurry of single-walled carbon nanotubes, the antimicrobial agent is nanopowdered zinc oxide, the defoamer is AFCONA2590 from Efcona Chemicals Co., Ltd., and the leveling agent is AFCONA3590 from Efcona Chemicals Co., Ltd.

[0029] The preparation method of the water-based wear-resistant and antibacterial floor decorative coating comprises the following steps:

[0030] 1) adding a hydroxy acrylic resin into a dispersing mixer, and sequentially adding a film-forming agent, a defoaming agent, a leveling agent, and a thixotropic agent at a stirring speed of 200 r / min, and mixing them uniformly to obtain a mixed solution;

[0031] 2) adding the color paste, conductive paste, polyurethane microbeads, antibacterial agent and water to the mixed solution respectively, and mixing them uniformly at a stirring speed of 600 r / min to obtain a colored paint;

[0032] 3) When in use, add the curing agent to the paint and mix evenly to obtain a water-based wear-resistant and antibacterial floor decorative coating.

[0033] Example 2 Water-based wear-resistant and antibacterial floor decorative coating

[0034] This water-based, wear-resistant, and antibacterial floor decorative coating comprises the following raw materials, in percentage by weight: 52% hydroxylated acrylic resin, 15% curing agent, 7% colorant, 4% film-forming agent, 6% polyurethane microbeads, 0.6% thixotropic agent, 0.2% antistatic slurry, 1% antimicrobial agent, 0.4% defoamer, 0.4% leveling agent, and 13.4% water. The hydroxylated acrylic resin is Bayhydrol XP2542, with a 4% hydroxyl content. The curing agent is a diisocyanate trimer, the thixotropic agent is BASFRheovis PU1291, the colorant is a water-based nano-colorant, the polyurethane microbeads have a particle size range of 5-8 μm, the antistatic slurry is a water-based slurry of single-walled carbon nanotubes, the antimicrobial agent is nanopowdered zinc oxide, the defoamer is BYK 024, and the leveling agent is BYK 354.

[0035] The preparation method of the water-based wear-resistant and antibacterial floor decorative coating comprises the following steps:

[0036] 1) adding a hydroxy acrylic resin into a dispersing mixer, and sequentially adding a film-forming agent, a defoaming agent, a leveling agent, and a thixotropic agent at a stirring speed of 250 r / min, and mixing them uniformly to obtain a mixed solution;

[0037] 2) adding the color paste, conductive paste, polyurethane microbeads, antibacterial agent and water to the mixed solution respectively, and mixing them uniformly at a stirring speed of 650 r / min to obtain a colored paint;

[0038] 3) When in use, add the curing agent to the paint and mix evenly to obtain a water-based wear-resistant and antibacterial floor decorative coating.

[0039] Example 3 Water-based wear-resistant and antibacterial floor decorative coating

[0040] This water-based, wear-resistant, and antibacterial floor decorative coating comprises the following raw materials, in percentage by weight: 58% hydroxylated acrylic resin, 18% curing agent, 6% colorant, 8% film-forming agent, 3% polyurethane microbeads, 0.3% thixotropic agent, 0.4% antistatic slurry, 0.5% antimicrobial agent, 0.4% defoamer, 0.4% leveling agent, and 5% water. The hydroxylated acrylic resin is SETAQUA-6515, with a 4% hydroxyl content. The curing agent is a diisocyanate trimer, the thixotropic agent is BASF Rheovis PU1291, the colorant is a water-based nano-colorant, the polyurethane microbeads have a particle size range of 5-8 μm, the antistatic slurry is a water-based slurry of single-walled carbon nanotubes, the antimicrobial agent is nanopowdered zinc oxide, the defoamer is TEGO 902W from Digo, and the leveling agent is TEGO 4100 from Digo.

[0041] The preparation method of the water-based wear-resistant and antibacterial floor decorative coating comprises the following steps:

[0042] 1) adding a hydroxy acrylic resin into a dispersing mixer, and sequentially adding a film-forming agent, a defoaming agent, a leveling agent, and a thixotropic agent at a stirring speed of 250 r / min, and mixing them uniformly to obtain a mixed solution;

[0043] 2) adding the color paste, conductive paste, polyurethane microbeads, antibacterial agent and water to the mixed solution respectively, and mixing them uniformly at a stirring speed of 750 r / min to obtain a colored paint;

[0044] 3) When in use, add the curing agent to the paint and mix evenly to obtain a water-based wear-resistant and antibacterial floor decorative coating.

[0045] Comparative Example 1

[0046] Floor decoration coatings include the following raw materials and their mass percentages:

[0047]

[0048] The difference between Comparative Example 1 and Example 1 is that the polyurethane microspheres are not contained and the wear-resistant powder is quartz powder.

[0049] Comparative Example 2

[0050] Floor decoration coatings include the following raw materials and their mass percentages:

[0051]

[0052] The difference between Comparative Example 2 and Example 1 is that no antibacterial powder is contained and the content of deionized water is increased.

[0053] Performance test case

[0054] The performance of the floor decoration coatings prepared in each embodiment and comparative example was tested according to relevant standards or commonly used testing equipment. The results are shown in Table 1 below.

[0055] Table 1 Test results of floor decoration coatings prepared in different embodiments and comparative examples

[0056]

[0057]

[0058] As shown in Table 1, the water-based wear-resistant and antibacterial floor decorative coatings provided in Examples 1, 2, and 3 of the present invention have excellent wear resistance and antibacterial properties, with Example 1 having the best overall performance. However, Comparative Example 1, which does not contain polyurethane microspheres and uses quartz powder as a wear-resistant powder, results in an uneven paint film appearance and affects the wear resistance of the paint film. Comparative Example 2, which does not contain antibacterial powder, has less than ideal antibacterial properties.

[0059] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A water-based wear-resistant and antibacterial floor decorative coating, characterized by: The invention is composed of the following raw materials and their mass percentages: 52%-58% of hydroxy acrylic resin, 12%-18% of curing agent, 6%-8% of color paste, 4%-8% of film-forming auxiliary agent, 3%-6% of polyurethane microbeads, 0.3%-0.6% of thixotropic auxiliary agent, 0.2%-0.5% of antistatic slurry, 0.5%-2% of antibacterial agent, 0.05%-0.4% of defoaming agent, 0.05%-0.4% of leveling agent, and 4%-18% of water; the curing agent is a hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate.

2. The water-based wear-resistant and antibacterial floor decorative paint according to claim 1, characterized in that: The preparation method is composed of the following raw materials and their mass percentages: 55% of hydroxy acrylic resin, 16% of curing agent, 7% of color paste, 6.4% of film-forming agent, 6% of polyurethane microbeads, 0.4% of thixotropic agent, 0.2% of antistatic slurry, 0.5% of antibacterial agent, 0.2% of defoaming agent, 0.3% of leveling agent and 8% of water.

3. The water-based wear-resistant and antibacterial floor decorative paint according to claim 1, characterized in that: The preparation method is composed of the following raw materials and their mass percentages: 52% of hydroxy acrylic resin, 15% of curing agent, 7% of color paste, 4% of film-forming agent, 5% of polyurethane microbeads, 0.6% of thixotropic agent, 0.2% of antistatic slurry, 1% of antibacterial agent, 0.4% of defoaming agent, 0.4% of leveling agent, and 14.4% of water.

4. The water-based wear-resistant and antibacterial floor decorative paint according to any one of claims 1 to 3, characterized in that: The particle size of the polyurethane microbeads is in the range of 5-15 μm.

5. The water-based wear-resistant and antibacterial floor decorative paint according to any one of claims 1 to 3, characterized in that: The film-forming aid is selected from one or more of alcohol ester dodecahydrate, DPM, DPNB; the leveling agent is selected from one or more of AFCONA3580, AFCONA3590, BYK354, BYK349, BYK346, TEGO450 and TEGO4100; the defoaming agent is selected from one or more of TEGO901W, TEGO902W, BYK012, BYK024, AFCONA2590 and AFCONA2507.

6. The water-based wear-resistant and antibacterial floor decorative paint according to any one of claims 1 to 3, characterized in that: The antibacterial agent is nano powder zinc oxide.

7. The water-based wear-resistant and antibacterial floor decorative paint according to any one of claims 1 to 3, characterized in that: The color paste is a water-based nano-color paste, the antistatic slurry is a single-walled carbon nanotube water-based slurry, and the thixotropic additive is BASFRheovis PU1291.

8. The method for preparing the water-based wear-resistant and antibacterial floor decorative coating according to any one of claims 1 to 7, characterized in that: The steps include: 1) adding a hydroxy acrylic resin into a dispersing mixer, and sequentially adding a film-forming agent, a defoaming agent, a leveling agent, and a thixotropic agent at a stirring speed of 180 to 800 r / min, and mixing them uniformly to obtain a mixed solution; 2) adding the color paste, conductive paste, polyurethane microbeads, antibacterial agent and water to the mixed solution respectively, and mixing them uniformly at a stirring speed of 400 to 800 r / min to obtain a colored paint; 3) When in use, add the curing agent to the paint and mix evenly to obtain a water-based wear-resistant and antibacterial floor decorative coating.

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