A wear-resistant epoxy-modified polyurethane floor coating and a preparation method thereof

Abstract

The present application relates to the technical field of paint, in particular to a wear-resistant epoxy modified polyurethane floor paint and a preparation method thereof.A wear-resistant epoxy modified polyurethane floor paint comprises component A and component B, the component A is prepared by the reaction of polyether polyol and hexamethylene diisocyanate-based polyisocyanate, and the component B comprises epoxy resin, polyaspartic resin, dipolyglyceryl dilinoleate, silane coupling agent, ethylene glycol monobutyl ether acetate, polysiloxane compound, organic polymer modified dimethyl siloxane, triethylene glycol diisooctanoate, pigment, filler, silicon dioxide, ultraviolet absorber and color paste.The application significantly enhances the weather resistance of the polyurethane floor paint by introducing the epoxy resin, using hexamethylene diisocyanate-based polyisocyanate and polyaspartic resin.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a wear-resistant epoxy-modified polyurethane floor coating and its preparation method. Background Technology

[0002] Floor coatings are widely used in industrial and commercial settings, such as factory workshops, warehouses, parking lots, and shopping malls, to provide a wear-resistant, corrosion-resistant, easy-to-clean, and maintain floor surface. However, with the increasing demands for floor performance in modern production and daily life, traditional solvent-based epoxy coatings are gradually failing to meet market needs. In recent years, polyurethane materials have been widely used in the floor coating field due to their excellent physicochemical properties. Polyurethane floor coatings possess good mechanical properties; however, because polyurethane molecular chains contain numerous ester bonds, these bonds are prone to hydrolysis and degradation under the influence of water and ultraviolet light. Therefore, polyurethane floor coatings exhibit relatively poor weather resistance and hydrolysis resistance.

[0003] Therefore, developing an epoxy-modified polyurethane floor coating with stronger weather resistance has become an important research direction in the coating industry. Summary of the Invention

[0004] To develop a more weather-resistant epoxy-modified polyurethane floor coating, this application proposes an epoxy-modified polyurethane floor coating. This application significantly enhances the weather resistance of the polyurethane floor coating by introducing epoxy resin and using hexamethylene diisocyanate-based polyisocyanate and polyaspartic resin.

[0005] In the first aspect, the wear-resistant epoxy-modified polyurethane floor coating provided in this application adopts the following technical solution: A wear-resistant epoxy-modified polyurethane floor coating includes component A and component B, wherein component A is prepared by polyether polyol and hexamethylene diisocyanate-based polyisocyanate in a mass ratio of (18-22):(78-82), and component B includes the following raw materials in parts by mass: 14-16 parts epoxy resin, 22-24 parts polyaspartic resin, 6 ~8 parts diglycerol sesquioctanoate, 0.25~0.32 parts silane coupling agent, 0.03~0.05 parts ethylene glycol monobutyl ether acetate, 0.03~0.05 parts polysiloxane compound, 0.03~0.04 parts organic polymer modified dimethylsiloxane, 0.04~0.05 parts triethylene glycol diisooctanoate, 10~11 parts pigment, 35~41 parts filler, 2~3 parts silica, 0.05~0.1 parts ultraviolet absorber, 3~3.5 parts color paste.

[0006] In the above technical solution, this application optimizes components A and B of the epoxy-modified polyurethane floor coating. A polyurethane prepolymer is generated through the reaction of polyether polyol in component A with hexamethylene diisocyanate-based polyisocyanate. Hexamethylene diisocyanate-based polyisocyanate, with its good reactivity and room temperature curing ability, is selected, resulting in a polyurethane prepolymer that imparts superior gloss and fullness to the coating. Simultaneously, the hexamethylene diisocyanate-based polyisocyanate exhibits good weather resistance, meeting the requirements for long-term outdoor exposure, achieving a perfect combination of chemical stability and physical properties. In component B, epoxy resin and polyaspartic resin are selected as the main materials. Polyaspartic resin has low viscosity, low-temperature resistance, and good adhesion, providing excellent adhesion and chemical stability, thus giving the epoxy-modified polyurethane floor coating better fullness and gloss. The addition of dipolyglycerol sesquioctanoate further enhances the coating's properties. Triethylene glycol diisooctanoate and ethylene glycol monobutyl ether acetate can reduce the viscosity of epoxy-modified polyurethane floor coatings while maintaining the excellent mechanical properties of the cured product. They effectively increase the active sites of the crosslinking reaction, which is beneficial to the density of the crosslinking network, giving the epoxy-modified polyurethane floor coatings better extensibility and adhesion, and enhancing the bond between the epoxy-modified polyurethane floor coatings and the substrate. The addition of silica improves the stability of the epoxy-modified polyurethane floor coatings and prevents delamination. The introduction of silane coupling agents, polysiloxane compounds, and organic polymer-modified dimethylsiloxane further improves the flexibility and chemical resistance of the coating, further extending the service life of the floor coating. The addition of UV absorbers gives the epoxy-modified polyurethane floor coatings better light stability and delays yellowing. The introduction of pigments and fillers gives the coating better smoothness and abrasion resistance.

[0007] Preferably, component A is prepared by polyether polyol and hexamethylene diisocyanate-based polyisocyanate in a mass ratio of 20:80.

[0008] In the above technical solution, this application controls the reaction ratio of polyether polyol and hexamethylene diisocyanate-based polyisocyanate in component A to 20:80. This ratio can ensure the formation of polyurethane prepolymer, while ensuring the flexibility and chemical resistance of the coating.

[0009] Preferably, component B comprises the following raw materials in parts by weight: 15.1 parts epoxy resin, 23.3 parts polyaspartic resin, 7.3 parts dipolyglycerol sesquioctanoate, 0.28 parts silane coupling agent, 0.04 parts ethylene glycol monobutyl ether acetate, 0.04 parts polysiloxane compound, 0.035 parts organic polymer modified dimethylsiloxane, 0.045 parts triethylene glycol diisooctanoate, 10.55 parts pigment, 37.82 parts filler, 2.2 parts silica, 0.08 parts ultraviolet absorber, and 3.21 parts color paste.

[0010] Preferably, the filler is composed of wet-process sericite powder, precipitated barium sulfate, and white corundum micro powder.

[0011] Preferably, component B comprises 10-11 parts wet-processed sericite powder, 11-14 parts precipitated barium sulfate, and 14-16 parts white corundum micro powder.

[0012] In the above technical solution, by selecting wet-process sericite powder, precipitated barium sulfate, and white fused alumina micro powder as fillers, the wet-process sericite powder exhibits good dispersibility and stability, which not only further improves the smoothness of the coating but also reduces ultraviolet penetration, thereby improving the coating's friction and mitigating cracking. Precipitated barium sulfate provides good hiding power and weather resistance, while white fused alumina micro powder has a narrow particle size distribution, good particle morphology, high grinding efficiency, and good polishing effect, further enhancing the coating's wear resistance and smoothness. Through the rational combination of these three fillers, the coating of this invention maintains good application performance while significantly improving the coating's physical properties.

[0013] Preferably, the mass ratio of component A to component B is 4:1.

[0014] In the above technical solution, this application controls the ratio of component A and component B. By controlling the mass ratio of component A and component B to 4:1, it can ensure that the coating has good mechanical properties and chemical resistance after curing, while maintaining good workability.

[0015] Secondly, the preparation method of the wear-resistant epoxy-modified polyurethane floor coating provided in this application adopts the following technical solution:

[0016] A method for preparing a wear-resistant epoxy-modified polyurethane floor coating, wherein the preparation method of component A includes the following steps:

[0017] Step 1: Add the polyether polyol to the reactor and stir at a speed of 500-800 r / min. At the same time, turn on the heating and raise the temperature to 110-120℃. Turn on the vacuum pump and control the vacuum degree between -0.095MPa and -0.01MPa. Vacuum dehydration for 2-2.5 hours.

[0018] Step 2: Cool the material obtained in Step 1 to 80-82°C, and then slowly add hexamethylene diisocyanate-based polyisocyanate in portions. After the addition is complete, keep the temperature constant at 80-85°C for 2-2.2 hours. After the reaction is complete, cool to 55-60°C to obtain component A.

[0019] Preferably, the preparation method of component B includes the following steps:

[0020] Step s1: Add epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate to the reactor in sequence, and stir at 800-1000 r / min for 15-20 min.

[0021] Step s2: Adjust the stirring speed to 1000-1500 r / min, then add the remaining materials in sequence, homogenize for 60-65 min, and component B can be obtained.

[0022] In the above technical solution, this application ensures the uniform mixing and full reaction of the coating components through specific process steps, thereby preparing a high-performance epoxy-modified polyurethane floor coating and ensuring the uniformity and stability of the coating.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. This application generates a polyurethane prepolymer by reacting hexamethylene diisocyanate-based polyisocyanate and polyether polyol. This isocyanate has good reactivity and weather resistance, which not only gives the coating good gloss and fullness, but also enables the coating to meet the requirements of long-term outdoor exposure.

[0025] 2. This application selects polyaspartic resin as the main material of component B. Polyaspartic resin has the characteristics of low viscosity, low temperature resistance and good adhesion, which can provide good adhesion and chemical stability, and give epoxy modified polyurethane floor coatings better fullness and gloss.

[0026] 3. This application adds dipolyglycerol sesquioctanoate, triethylene glycol diisooctanoate and ethylene glycol monobutyl ether acetate as additives in component B. The combination of the three can reduce the refractory viscosity of the slurry as much as possible while maintaining good mechanical properties of the cured product. It can not only give the coating good smoothness, but also further improve the coating's ductility and adhesion, and enhance the bonding force between the coating and the substrate. Detailed Implementation

[0027] To better illustrate the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0028] The sources of some raw materials in the following specific implementation methods are shown in Table 1.

[0029] Table 1:

[0030]

[0031]

[0032] Example 1

[0033] A wear-resistant epoxy-modified polyurethane floor coating, comprising component A and component B.

[0034] The mass ratio of component A to component B is 4:1.

[0035] Component A is prepared by reacting polyether polyol and hexamethylene diisocyanate-based polyisocyanate.

[0036] Component B includes epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, ethylene glycol monobutyl ether acetate, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, pigment, filler, silica, ultraviolet absorber, and color paste.

[0037] The pigment is titanium dioxide.

[0038] The filler is composed of wet-process sericite powder, precipitated barium sulfate and white corundum micro powder.

[0039] The preparation method of wear-resistant epoxy-modified polyurethane floor coating includes the preparation of component A and component B.

[0040] The preparation method of component A includes the following steps:

[0041] Step 1: Add the polyether polyol to the reactor and stir at 600 r / min. At the same time, start heating and raise the temperature to 115℃. Turn on the vacuum pump and control the vacuum degree between -0.095MPa and -0.01MPa. Vacuum dehydration for 2.2h.

[0042] Step 2: Cool the material obtained in Step 1 to 82°C, and then slowly add hexamethylene diisocyanate-based polyisocyanate in portions. After the addition is complete, keep the temperature constant at 85°C for 2 hours. After the reaction is complete, cool to 58°C to obtain component A.

[0043] The preparation method of component B includes the following steps:

[0044] Step s1: Add epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate to the reactor in sequence, and stir at 900 r / min for 18 min.

[0045] Step s2: Adjust the stirring speed to 1200 r / min, then add the remaining materials in sequence, homogenize for 62 min, and component B can be obtained.

[0046] Example 2

[0047] A wear-resistant epoxy-modified polyurethane floor coating, which differs from Example 1, includes component A and component B.

[0048] Component A is prepared by reacting polyether polyol and hexamethylene diisocyanate-based polyisocyanate.

[0049] Component B includes epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, ethylene glycol monobutyl ether acetate, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, pigment, filler, silica, ultraviolet absorber, and color paste.

[0050] The preparation method of wear-resistant epoxy-modified polyurethane floor coating includes the preparation of component A and component B.

[0051] The preparation method of component A includes the following steps:

[0052] Step 1: Add the polyether polyol to the reactor and stir at 800 r / min. At the same time, start heating and raise the temperature to 110℃. Turn on the vacuum pump and control the vacuum degree between -0.095MPa and -0.01MPa. Vacuum dehydration for 2 hours.

[0053] Step 2: Cool the material obtained in Step 1 to 82°C, and then slowly add hexamethylene diisocyanate-based polyisocyanate in portions. After the addition is complete, keep the temperature constant at 85°C for 2 hours. After the reaction is complete, cool to 60°C to obtain component A.

[0054] The preparation method of component B includes the following steps:

[0055] Step s1: Add epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate to the reactor in sequence, and stir at 1000 r / min for 15 min.

[0056] Step s2: Adjust the stirring speed to 1500 r / min, then add the remaining materials in sequence, homogenize for 60 min, and component B can be obtained.

[0057] Example 3

[0058] A wear-resistant epoxy-modified polyurethane floor coating, which differs from Example 1, includes component A and component B.

[0059] Component A is prepared by reacting polyether polyol and hexamethylene diisocyanate-based polyisocyanate.

[0060] Component B includes epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, ethylene glycol monobutyl ether acetate, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, pigment, filler, silica, ultraviolet absorber, and color paste.

[0061] The preparation method of wear-resistant epoxy-modified polyurethane floor coating includes the preparation of component A and component B.

[0062] The preparation method of component A includes the following steps:

[0063] Step 1: Add the polyether polyol to the reactor and stir at 500 r / min. At the same time, start heating and raise the temperature to 120℃. Turn on the vacuum pump and control the vacuum degree between -0.095MPa and -0.01MPa. Vacuum dehydration for 2.5h.

[0064] Step 2: Cool the material obtained in Step 1 to 80°C, and then slowly add hexamethylene diisocyanate-based polyisocyanate in portions. After the addition is complete, keep the temperature constant at 82°C for 2.2 hours. After the reaction is complete, cool to 55°C to obtain component A.

[0065] The preparation method of component B includes the following steps:

[0066] Step s1: Add epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate to the reactor in sequence, and stir at 800 r / min for 20 min.

[0067] Step s2: Adjust the stirring speed to 1000 r / min, then add the remaining materials in sequence, homogenize for 65 min, and component B can be obtained.

[0068] The amounts (g) of each raw material used in Examples 1 to 3 are shown in Table 2.

[0069] Table 2:

[0070]

[0071] Comparative Example 1

[0072] An epoxy-modified polyurethane floor coating, which differs from Example 1 in that hexamethylene diisocyanate-based polyisocyanate is replaced in equal amounts with hexamethylene diisocyanate (HDI), purchased from Wanhua Chemical.

[0073] Comparative Example 2

[0074] An epoxy-modified polyurethane floor coating differs from Example 1 in that the polyaspartic resin is replaced in equal amounts with epoxy resin GELR128.

[0075] Comparative Example 3

[0076] An epoxy-modified polyurethane floor coating, which differs from Example 1 in that an equal amount of dipolyglycerol sesquioctanoate is replaced with C12 to C14 tetraalkyl glycidyl ether, model: XY748, purchased from Anhui Xinyuan Technology Co., Ltd.

[0077] Comparative Example 4

[0078] An epoxy-modified polyurethane floor coating, which differs from Example 1 in that triethylene glycol diisooctanoate is replaced in equal amounts with C12 to C14-tetradecyl glycidyl ether, model: XY748, purchased from Anhui Xinyuan Technology Co., Ltd.

[0079] Comparative Example 5

[0080] An epoxy-modified polyurethane floor coating differs from Example 1 in that an equal amount of ethylene glycol monobutyl ether acetate is replaced with a polyphosphate solution, model: DISPERBYK-110, purchased from BYK Chemical GmbH, Germany.

[0081] Performance testing

[0082] The epoxy-modified polyurethane floor coatings of the above embodiments and comparative examples were tested according to the items shown in Table 3. The test results are shown in Tables 4 and 5.

[0083] Table 3:

[0084]

[0085] Table 4:

[0086]

[0087]

[0088] Table 5:

[0089]

[0090]

[0091] As can be seen from the test results in Tables 4 and 5, the epoxy-modified polyurethane floor coatings of Examples 1 to 3 all showed good performance in terms of adhesion, abrasion resistance and elongation at break. This indicates that the epoxy-modified polyurethane floor coating formulations of this application can significantly improve the overall performance of the coating, especially significantly improve the adhesion, abrasion resistance and ductility of the epoxy-modified polyurethane floor coatings.

[0092] Specifically, based on the analysis of Example 1 and Comparative Examples 1-2, it can be seen that the difference between Comparative Examples 1-2 and Example 1 lies in the substitution of hexamethylene diisocyanate-based polyisocyanate and polyaspartic resin, respectively. Example 1 exhibits good salt water resistance. Therefore, it is evident that adding hexamethylene diisocyanate-based polyisocyanate and polyaspartic resin to epoxy-modified polyurethane floor coatings is of great significance for improving the weather resistance of epoxy-modified polyurethane floor coatings. Hexamethylene diisocyanate-based polyisocyanate and polyaspartic resin can effectively improve the weather resistance of epoxy-modified polyurethane floor coatings.

[0093] Specifically, by referring to Example 1 and Comparative Examples 3-5, it can be seen that the difference between Comparative Examples 3-4 and Example 1 is that dipolyglycerol sesquioctanoate, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate were replaced respectively. Example 1 has good adhesion and abrasion resistance. It can be seen that dipolyglycerol sesquioctanoate, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate have a synergistic effect. The combination of the three can further improve the extensibility and adhesion of the coating and enhance the bonding force between the coating and the substrate.

[0094] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A wear-resistant epoxy-modified polyurethane floor coating, characterized in that, It includes component A and component B, wherein component A is prepared by polyether polyol and hexamethylene diisocyanate-based polyisocyanate in a mass ratio of (18~22):(78~82). Component B comprises the following raw materials in parts by weight: 14-16 parts epoxy resin, 22-24 parts polyaspartic resin, 6-8 parts dipolyglycerol sesquioctanoate, 0.25-0.32 parts silane coupling agent, 0.03-0.05 parts ethylene glycol monobutyl ether acetate, 0.03-0.05 parts polysiloxane compound, 0.03-0.04 parts organic polymer modified dimethylsiloxane, 0.04-0.05 parts triethylene glycol diisooctanoate, 10-11 parts pigment, 35-41 parts filler, 2-3 parts silica, 0.05-0.1 parts ultraviolet absorber, and 3-3.5 parts color paste; The filler is composed of 10-11 parts wet-process sericite powder, 11-14 parts precipitated barium sulfate, and 14-16 parts white corundum micro powder.

2. The wear-resistant epoxy-modified polyurethane floor coating according to claim 1, characterized in that, Component A is prepared by mixing polyether polyol and hexamethylene diisocyanate-based polyisocyanate in a mass ratio of 20:

80.

3. The wear-resistant epoxy-modified polyurethane floor coating according to claim 1, characterized in that, Component B comprises the following raw materials in parts by weight: 15.1 parts epoxy resin, 23.3 parts polyaspartic resin, 7.3 parts dipolyglycerol sesquioctanoate, 0.28 parts silane coupling agent, 0.04 parts ethylene glycol monobutyl ether acetate, 0.04 parts polysiloxane compound, 0.035 parts organic polymer modified dimethylsiloxane, 0.045 parts triethylene glycol diisooctanoate, 10.55 parts pigment, 37.82 parts filler, 2.2 parts silica, 0.08 parts ultraviolet absorber, and 3.21 parts color paste.

4. The wear-resistant epoxy-modified polyurethane floor coating according to claim 1, characterized in that, The mass ratio of component A to component B is 4:

1.

5. A method for preparing a wear-resistant epoxy-modified polyurethane floor coating according to any one of claims 1-4, characterized in that, The preparation method of component A includes the following steps: Step 1: Add the polyether polyol to the reactor and stir at a speed of 500~800 r / min. At the same time, turn on the heating and raise the temperature to 110~120℃. Turn on the vacuum pump and control the vacuum degree between -0.095MPa and -0.01MPa. Vacuum dehydration for 2~2.5h. Step 2: Cool the material obtained in Step 1 to 80~82℃, then add hexamethylene diisocyanate-based polyisocyanate in portions. After the addition is complete, keep the temperature constant at 80~85℃ for 2~2.2h. After the reaction is complete, cool to 55~60℃ to obtain component A.

6. The method for preparing a wear-resistant epoxy-modified polyurethane floor coating according to claim 5, characterized in that, The preparation method of component B includes the following steps: Step s1: Add epoxy resin, polyaspartic resin, dipolyglycerol sesquioctanoate, silane coupling agent, polysiloxane compound, organic polymer modified dimethylsiloxane, triethylene glycol diisooctanoate, and ethylene glycol monobutyl ether acetate to the reactor in sequence, and stir at 800~1000 r / min for 15~20 min. Step s2: Adjust the stirring speed to 1000~1500r / min, then add the remaining materials in sequence, homogenize for 60~65min, and component B can be obtained.

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