A water-based epoxy floor paint composition

Abstract

This application relates to the technical field of waterborne epoxy coatings, and specifically provides a waterborne epoxy floor paint composition. This application utilizes a modified curing agent containing a branched structure, multiple amino groups, multiple polyether segments, and multiple polysiloxane segments as part of the curing agent, thereby achieving a slow surface-drying and fast through-drying effect for the waterborne epoxy floor paint composition, thereby improving the performance of the epoxy floor.

Description

Technical Field

[0001] The present application relates to the technical field of waterborne epoxy coatings, and in particular to a waterborne epoxy floor paint composition. Background Art

[0002] Water-based epoxy floor paint is often used in garages and other environments. Although epoxy flooring has high wear resistance and bonding strength, it can still show obvious wear and tear during use. In particular, moisture penetration into epoxy flooring will gradually affect the bonding strength of the epoxy floor, leading to shedding and failure of the epoxy floor.

[0003] Moisture penetration into epoxy floors is inevitable. Therefore, in order to reduce the impact of moisture penetration on epoxy floors, the following measures can be taken: for example, the crosslinking density of the epoxy floor can be increased, which is also beneficial for improving its wear resistance, but will lead to a decrease in the impact resistance of the epoxy floor. Alternatively, the permeability of the epoxy floor paint into the base concrete can be increased. The deeper the epoxy floor paint penetrates into the base concrete, the stronger its resistance to moisture penetration.

[0004] To improve the permeability of epoxy floor paint to the base concrete, the following technical measures can be taken: reducing the viscosity of the epoxy floor paint, increasing the permeability of the epoxy floor paint, and extending the drying time of the epoxy floor paint. For water-based epoxy floor paint, the viscosity does not fluctuate significantly. Prolonging the drying time of the epoxy floor paint can improve the permeability of the epoxy floor paint to the base concrete, but it also affects construction efficiency. Summary of the Invention

[0005] The applicant has conducted in-depth research on the drying time of waterborne epoxy floor coatings and found that while extending the surface drying time of waterborne epoxy floor coatings, it can also shorten the actual drying time, which not only facilitates the penetration of epoxy floor coatings into the substrate concrete, but also improves construction efficiency. Based on this, the present application provides a waterborne epoxy floor paint composition.

[0006] This application adopts the following technical solutions:

[0007] A water-based epoxy floor paint composition, comprising component A and component B in a weight ratio of 1:1-1:10;

[0008] The raw material components of component A are 100% by weight: 25-40% amine curing agent, 5-15% modified curing agent, 0.5-1.2% wetting agent, 0.5-1% leveling agent, 0-30% water-based color paste, 0.5-1.5% dispersant, 0.5-1% defoaming agent, and the balance is water;

[0009] The modified curing agent is prepared as follows:

[0010] Silane-terminated polyether, aminodialkoxysilane, octamethylcyclotetrasiloxane and a capping agent are added to a reaction vessel in a weight ratio of 1:0.03-0.2:0.5-3:0.03-0.1, an alkaline catalyst is added, the temperature is increased to react, the catalyst is removed, and low-boiling substances are removed to obtain the modified curing agent;

[0011] The raw material components of the B component include 85-100% epoxy resin dispersion, 0-13% diluent and 0-2% curing accelerator based on 100% by weight.

[0012] Preferably, the general formula of the silane-terminated polyether is (OR 1 ) x Me 3-x SiR 3 SiMe 3-y (OR 2 ) y , where R 1 and R 2 independently selected from C1-C4 alkyl, R 3 represents a polyether structure, Me represents a methyl group, x=2-3, and y=2-3.

[0013] Preferably, the general formula of the aminodialkoxysilane is R 4 R 5 Si(OR 6 )2, where R 4 is an amino-substituted C3-C10 alkyl group, R 5 is selected from C1-C4 alkyl or C6-C12 aromatic groups, R 6 Selected from C1-C4 alkyl or C2-C4 acyl.

[0014] Preferably, the capping agent is selected from hexamethyldisiloxane or dimethyl silicone oil with a viscosity of 3-10 mPa·s at 25°C.

[0015] Preferably, the alkaline catalyst is selected from one of tetramethylammonium hydroxide, siloxane ammonium salt, potassium hydroxide and siloxane potassium.

[0016] Preferably, the amine curing agent is selected from one or a combination of diethylenetriamine, tetraethylenepentamine, polyetheramine and hydroxyethylethylenediamine.

[0017] Preferably, the solid content of the epoxy resin dispersion is 30-70%.

[0018] Preferably, the epoxy resin dispersion is selected from epoxy resin aqueous solution or epoxy resin microemulsion.

[0019] Preferably, the diluent is a reactive diluent.

[0020] Preferably, the curing accelerator is selected from tertiary amine compounds.

[0021] In summary, this application has the following beneficial effects:

[0022] 1. This application uses silane-terminated polyether to prepare a modified curing agent. The obtained modified curing agent molecule has a branched structure and contains multiple amino groups, polyether segments and polysiloxane segments. The combined effect of the polyether segments and the amino groups makes the modified curing agent have good hydrophilicity, and the polyether segments and the polysiloxane segments can play a role in toughening and improving impact resistance. Multiple amino groups can increase the cross-linking density of the epoxy resin and accelerate the actual drying curing rate. Perhaps because the modified curing agent has a branched macromolecular structure, the reaction rate during the initial drying is slow. As the drying reaction continues, the multiple amino groups show the effect of faster curing and cross-linking.

[0023] 2. This application uses silane-terminated polyether as one of the raw materials for preparing a modified curing agent, which reacts with aminodialkoxysilane and octamethylcyclotetrasiloxane. The alkoxysilyl groups at both ends of the silane-terminated polyether can participate in the reaction, thereby forming a branched structure. Therefore, the modified curing agent of this application contains multiple amino groups, polyether segments and polysiloxane segments, which work synergistically. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below.

[0025] Throughout this specification, unless otherwise specified, the terms used herein should be understood as having the same meaning as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In the event of any conflict, the present specification shall take precedence.

[0026] The present application provides a water-based epoxy floor paint composition, which is composed of component A and component B in a weight ratio of 1:1-1:10; component A is 100% by weight, and the raw material components include: 25-40% amine curing agent, 5-15% modified curing agent, 0.5-1.2% wetting agent, 0.5-1% leveling agent, 0-30% water-based color paste, 0.5-1.5% dispersant, 0.5-1% defoaming agent, and the balance is water;

[0027] The modified curing agent was prepared as follows:

[0028] Silane-terminated polyether, aminodialkoxysilane, octamethylcyclotetrasiloxane (D 4) and a head sealing agent are added to a reaction vessel in a weight ratio of 1:0.03-0.2:0.5-3:0.03-0.1, an alkaline catalyst is added, the temperature is raised to react, the catalyst is removed, and low-boiling substances are removed to obtain a modified curing agent;

[0029] The raw material components of component B include 85-100% epoxy resin dispersion, 0-13% diluent and 0-2% curing accelerator based on 100% by weight.

[0030] In the prior art, waterborne epoxy floor paint compositions generally use amine compounds such as polyetheramine and diethylenetriamine as the curing agents. However, either the surface drying and the actual drying are both fast, or the surface drying and the actual drying are both slow, and the effect of slow surface drying and fast actual drying cannot be achieved. The present application adds a modified curing agent to the waterborne epoxy floor paint composition to replace part of the existing amine curing agent. The modified curing agent is a macromolecule with a branched structure, and the molecule contains multiple amino groups, polyether segments and polysiloxane segments. The polyether segments and polysiloxane segments can be used as toughening agents for epoxy resins to improve the impact resistance of epoxy floors. Multiple amino groups can increase the crosslinking density of epoxy floors and achieve the effect of fast actual drying. The combined action of amino groups and polyether segments can increase the hydrophilicity of the modified curing agent, and possibly due to the macromolecular branched structure of the modified curing agent, the curing reaction rate in the initial drying stage is slow, thereby achieving slow surface drying.

[0031] However, if a modified curing agent is used to completely replace the existing amine curing agent, the surface drying will be too slow, affecting the construction time. The water-based epoxy floor paint composition of the present application adopts a combination of an existing amine curing agent and a modified curing agent, achieving the effect of slow surface drying and fast through drying, and the surface drying and through drying times are relatively reasonable.

[0032] In a preferred embodiment of the present application, the general formula of the silane-terminated polyether is (OR 1 ) x Me 3-x SiR 3 SiMe 3-y (OR 2 ) y , where R 1 and R 2 independently selected from C1-C4 alkyl, R 3 Represents a polyether structure, Me represents a methyl group, x=2-3, y=2-3. Specifically, the silane-terminated polyether can be composed of a hydrogen-containing silane (OR 1 ) x Me 3-x SiH and / or (OR 2 ) y Me 3-y SiH is obtained by hydrosilylation reaction with double-terminal allyl polyether, or by isocyanate silane (OR 1 )x Me 3-x SiR 7 and / or 2 ) y Me 3-y SiR 8 It is obtained by addition reaction with double-terminated hydroxyl polyether, wherein R 7 and R 8 The silane-terminated polyether contains two or three alkoxysilyl groups at both ends, which can be combined with aminodialkylsilane, D 4 The reaction proceeds, whereby a polymer having a branched structure can be formed.

[0033] In a preferred embodiment of the present application, the general formula of aminodialkoxysilane is R 4 R 5 Si(OR 6 )2, where R 4 is an amino-substituted C3-C10 alkyl group, R 5 is selected from C1-C4 alkyl or C6-C12 aromatic groups, R 6 Selected from C1-C4 alkyl or C2-C4 acyl. For example, the aminodialkoxysilane can be 3-aminopropylmethyldimethoxysilane, 3-aminopropylmethyldiethoxysilane, β-aminoethyl-γ-aminopropylmethyldimethoxysilane and β-aminoethyl-γ-aminopropylmethyldiethoxysilane.

[0034] In a preferred embodiment of the present application, the capping agent is selected from hexamethyldisiloxane or dimethyl silicone oil with a viscosity of 3-10 mPa·s at 25°C. By selecting and controlling the amount of the capping agent, the degree of polymerization and branching of the modified curing agent can be adjusted, thereby affecting the number and distribution of amino groups in the degree of polymerization and branching of the modified curing agent.

[0035] In a preferred embodiment of the present application, the alkaline catalyst is selected from one of tetramethylammonium hydroxide, siloxane alcohol ammonium salt (or ammonium gel), potassium hydroxide and siloxane alcohol potassium (or potassium gel). Ammonium gel and potassium gel are respectively tetramethylammonium hydroxide and potassium hydroxide with siloxane ring (such as D 4or DMC) reaction product. Ammonium gel and potassium gel have good compatibility with the siloxane reaction raw materials and high catalytic activity. When the alkaline catalyst is tetramethylammonium hydroxide or ammonium gel, the weight added can be 0.01-0.02% of the raw material weight, calculated as tetramethylammonium hydroxide. The reaction can be carried out at 110-120°C for 1.5-2.5 hours. The catalyst can be removed by heating to above 135°C to destroy and decompose the catalyst. When the alkaline catalyst is potassium hydroxide or potassium gel, the weight added can be 0.02-0.1% of the raw material weight, calculated as potassium hydroxide. The reaction can be carried out at 150-160°C for 2-5 hours. The catalyst can be removed by adding a neutralizer (such as silicon-based phosphate) for neutralization. Removal of low-boiling substances can be carried out by vacuum distillation below -0.099MPa and 130-150°C.

[0036] In a preferred embodiment of the present application, the amine curing agent is selected from one or a combination of diethylenetriamine, tetraethylenepentamine, polyetheramine, and hydroxyethylethylenediamine. The use of such amine curing agents not only has good water solubility, but also can gradually provide a cross-linking and curing effect on the epoxy resin as the water-based epoxy floor paint gradually dries. Specifically, the polyetheramine can be D230, D400, D2000, T-403, T-5000, etc.

[0037] In a preferred embodiment of the present application, the solids content of the epoxy resin dispersion is 30-70%. The solids content can be determined using the following method: approximately 2 g (accurate to 0.001 g) of the epoxy resin dispersion to be tested is placed in a weighing bottle, heated in a 120°C forced air drying oven for 2 hours, removed, and cooled in a desiccator for 2 hours. The sample is then weighed and the weight change before and after heating is calculated: solids content = weight after heating / initial weight × 100%.

[0038] In a preferred embodiment of the present application, the epoxy resin dispersion is selected from an epoxy resin aqueous solution or an epoxy resin microemulsion. The epoxy resin aqueous solution or epoxy resin microemulsion has a relatively low particle size, for example, the particle size of the epoxy resin aqueous solution generally does not exceed 10 nm, and the particle size of the epoxy resin microemulsion generally does not exceed 500 nm, thereby providing good permeability to concrete.

[0039] In a preferred embodiment of the present application, the diluent is a reactive diluent. The reactive diluent is a diluent with an epoxy group, which can reduce the viscosity of the epoxy resin and participate in the curing reaction of the epoxy resin. For example, the reactive diluent can be butyl glycidyl ether, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, benzyl glycidyl ether, neopentyl glycol diglycidyl ether, propylene glycol diglycidyl ether, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, etc.

[0040] In a preferred embodiment of the present application, the curing accelerator is selected from tertiary amine compounds. For example, the tertiary amine compound can be triethylamine, triethanolamine, N-methyldiethylamine, N-methyldiethanolamine, N,N-dimethylbenzylamine, etc.

[0041] In the present application, the wetting agent can be a polyether modified silicone oil wetting agent, the leveling agent can be a polyether modified silicone oil leveling agent or an acrylic leveling agent, the water-based color paste can be different colors, such as white, yellow, gray, red, black, etc., the dispersant can be a polymer dispersant, such as an acrylic dispersant, and the defoaming agent can be a dimethyl silicone oil defoaming agent.

[0042] The technical solution of the present application is described in detail below with reference to preparation examples, embodiments and comparative examples.

[0043] Preparation Example 1-3 Preparation of modified curing agent

[0044] Preparation Example 1

[0045] Dimethoxymethylsilane and double-terminal allyl polyether CH2=CHCH2O(CH2CH2O) 16.7 CH2CH=CH2 was added to the reaction vessel in a molar ratio of 2.2:1, and the temperature was raised to 85°C. Karstedt catalyst (10 ppm based on Pt) was added, and the reaction was carried out at 120-125°C for 3 hours. The pressure was reduced to below -0.099 MPa to remove unreacted dimethoxymethylsilane to obtain a silane-terminated polyether.

[0046] The above silane-terminated polyether, 3-aminopropylmethyldimethoxysilane, D 4 and dimethyl silicone oil (viscosity 5 mPa.s at 25°C) are added to a reaction vessel in a weight ratio of 1:0.1:1.2:0.07, and ammonium gel (concentration 1 wt%) is added at 1% by weight of the reaction raw materials. The mixture is protected by nitrogen and heated to 115-120°C for reaction for 2 hours. The temperature is further raised to 135-140°C to destroy the catalyst for 0.5 hour, and the pressure is further reduced to below -0.099 MPa to remove low-boiling substances to obtain a modified curing agent.

[0047] Preparation Example 2

[0048] The difference between Preparation Example 2 and Preparation Example 1 is that in Preparation Example 1, silane-terminated polyether, 3-aminopropyldimethoxysilane, D 4 The weight ratio of dimethyl silicone oil was adjusted from 1:0.1:1.2:0.07 to 1:0.07:0.8:0.05. The other steps remained unchanged.

[0049] Preparation Example 3

[0050] Trimethoxysilane and double-terminal allyl polyether CH2=CHCH2O(CH2CH2O)14.2 CH2CH=CH2 was added to the reaction vessel in a molar ratio of 2.3:1, and the temperature was raised to 85°C. Karstedt catalyst (10 ppm based on Pt) was added, and the reaction was carried out at 125-130°C for 3 hours. The pressure was reduced to below -0.099 MPa to remove unreacted trimethoxysilane to obtain a silane-terminated polyether.

[0051] The above silane-terminated polyether, β-aminoethyl-γ-aminopropylmethyldimethoxysilane, D 4 and dimethyl silicone oil (viscosity 3 mPa.s at 25°C) are added to a reaction vessel in a weight ratio of 1:0.15:2.5:0.1, ammonium gel (concentration 1 wt%) is added at 1% by weight of the reaction raw materials, the temperature is raised to 115-120°C for reaction for 2 hours, the temperature is continued to be raised to 135-140°C to destroy the catalyst for 0.5 hour, and the pressure is continued to be reduced to below -0.099 MPa to remove low-boiling substances to obtain a modified curing agent.

[0052] Example 1

[0053] Component A is 100% by weight, and the raw material components include: 35% polyetheramine D-230, 10% modified curing agent of Preparation Example 1, 0.7% polyether modified silicone oil wetting agent, 0.6% polyether modified silicone oil leveling agent, 20% water-based white color paste, 1% Lubrizol hyperdispersant 27000, 0.7% dimethyl silicone oil defoaming agent, and the balance is water.

[0054] Add polyetheramine D-230 and modified curing agent to water, stir and disperse at a stirring speed of 3000 rpm for 5 minutes, add wetting agent, leveling agent, hyperdispersant and defoaming agent in sequence, stir at a stirring speed of 800 rpm for 15 minutes, then add water-based white color paste, stir at a stirring speed of 1000 rpm for 6 minutes to obtain component A.

[0055] The raw material components of component B are 100% by weight, including: 90% epoxy resin microemulsion (solid content 55%), 9% diethylene glycol diglycidyl ether and 1% triethanolamine.

[0056] Diethylene glycol diglycidyl ether and triethanolamine were added to the epoxy resin microemulsion, and the mixture was stirred at a stirring speed of 600 rpm for 10 minutes to obtain component B.

[0057] Component A and component B were mixed in a weight ratio of 1:2, and stirred at a stirring speed of 300 rpm for 5 minutes to obtain a water-based epoxy floor paint composition.

[0058] Example 2

[0059] The difference between Example 2 and Example 1 is that in Example 1, the polyetheramine D-230 is adjusted from 35% to 30%, and the modified curing agent in Preparation Example 1 is adjusted from 10% to 15%. The other steps remain unchanged.

[0060] Example 3

[0061] The difference between Example 3 and Example 1 is that in Example 1, the polyetheramine D-230 is adjusted from 35% to 40%, and the modified curing agent in Preparation Example 1 is adjusted from 10% to 5%. The other steps remain unchanged.

[0062] Example 4

[0063] The difference between Example 4 and Example 1 is that in Example 1, the modified curing agent of Preparation Example 1 is replaced by an equal weight of the modified curing agent of Preparation Example 2. The remaining steps remain unchanged.

[0064] Example 5

[0065] The difference between Example 5 and Example 1 is that in Example 1, the modified curing agent of Preparation Example 1 is replaced by an equal weight of the modified curing agent of Preparation Example 3. The remaining steps remain unchanged.

[0066] Comparative Example 1

[0067] The difference between Comparative Example 1 and Example 1 is that in Example 1, the polyetheramine D-230 is adjusted from 35% to 45%, and no modified curing agent is added. The remaining steps remain unchanged.

[0068] Comparative Example 2

[0069] The difference between Comparative Example 2 and Example 1 is that in Example 1, polyetheramine D-230 was not added, and the modified curing agent was adjusted from 10% to 45%. The other steps remained unchanged.

[0070] Example 6

[0071] Component A is 100% by weight, and the raw material components include: 38% polyetheramine D-2000, 12% modified curing agent of Preparation Example 3, 0.6% polyether modified silicone oil wetting agent, 0.5% polyether modified silicone oil leveling agent, 25% water-based gray color paste, 0.6% dispersant AEO-9, 0.8% dimethyl silicone oil defoaming agent, and the balance is water.

[0072] Add polyetheramine D-2000 and modified curing agent to water, disperse at a stirring speed of 3000 rpm for 6 minutes, add wetting agent, leveling agent, dispersant and defoaming agent in sequence, stir at a stirring speed of 900 rpm for 12 minutes, then add water-based gray color paste, stir at a stirring speed of 1000 rpm for 6 minutes to obtain component A.

[0073] The raw material components of component B are 100% by weight, including: 94% epoxy resin microemulsion (solid content 55%), 5% propylene glycol diglycidyl ether and 1% N-methyldiethanolamine.

[0074] Propylene glycol diglycidyl ether and N-methyldiethanolamine were added to the epoxy resin microemulsion, and the mixture was stirred at a stirring speed of 600 rpm for 10 minutes to obtain component B.

[0075] Component A and component B were mixed in a weight ratio of 1:2, and stirred at a stirring speed of 300 rpm for 5 minutes to obtain a water-based epoxy floor paint composition.

[0076] Example 7

[0077] The difference between Example 7 and Example 6 is that in Example 6, the polyetheramine D-2000 is replaced by an equal weight of hydroxyethylethylenediamine, and the weight ratio of component A to component B is adjusted to 1:5. The remaining steps remain unchanged.

[0078] Comparative Example 3

[0079] The difference between Comparative Example 3 and Example 7 is that in Example 7, the modified curing agent is replaced by an equal weight of polyetheramine D-2000. The remaining steps remain unchanged.

[0080] Performance Testing

[0081] The waterborne epoxy floor paint compositions of Examples 1-7 and Comparative Examples 1-3 were applied to six surfaces of clean concrete (surface roughness grade A, size of 20 cm×20 cm×5 cm).

[0082] Abrasion resistance, impact resistance, and tensile bond strength were tested according to GB / 22374-2018, with a curing time of 72 hours. The results are shown in Table 1 below. For the impact resistance test, Type I: 500g steel ball, height 100cm; Type II: 1000g steel ball, height 100cm. An impact resistance rating of Type I indicates that the material meets Type I standards but falls short of Type II standards.

[0083] Table 1

[0084]

[0085]

[0086] It can be seen from the results in Table 1 above that the waterborne epoxy floor paint composition of the present application has the characteristics of slow surface drying and fast actual drying, and the epoxy floor has better wear resistance and higher tensile bonding strength.

[0087] Moisture resistance test

[0088] The epoxy floor-coated concrete was placed in a constant temperature and humidity test chamber at 80°C and 90% humidity for 96 hours. The concrete was then removed and wiped to remove surface moisture. The epoxy floor coating was then observed for abnormalities such as bubbling, protrusions, and shedding. The results are shown in Table 2 below.

[0089] Table 2

[0090] Test results Test results Example 1 No abnormalities Comparative Example 1 A small amount of bubbling Example 2 No abnormalities Comparative Example 2 No abnormalities Example 3 No abnormalities Example 6 No abnormalities Example 4 No abnormalities Example 7 No abnormalities Example 5 No abnormalities Comparative Example 3 Falling off

[0091] It can be seen from the data results in Table 2 that the epoxy floor has good moisture resistance after the water-based epoxy floor paint composition of the present application is cured.

[0092] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A waterborne epoxy floor paint composition, characterized in that, It is composed of component A and component B in a weight ratio of 1:1-1:10; The raw material components of component A are 100% by weight: 25-40% amine curing agent, 5-15% modified curing agent, 0.5-1.2% wetting agent, 0.5-1% leveling agent, 0-30% water-based color paste, 0.5-1.5% dispersant, 0.5-1% defoaming agent, and the balance is water; The modified curing agent is prepared as follows: Silane-terminated polyether, aminodialkoxysilane, octamethylcyclotetrasiloxane and a capping agent are added to a reaction vessel in a weight ratio of 1:0.03-0.2:0.5-3:0.03-0.1, an alkaline catalyst is added, the temperature is increased to react, the catalyst is removed, and low-boiling substances are removed to obtain the modified curing agent; The raw material components of the B component include 85-100% epoxy resin dispersion, 0-13% diluent and 0-2% curing accelerator based on 100% by weight; The general formula of the silane-terminated polyether is (OR 1 ) x Me 3-x SiR 3 SiMe 3-y (OR 2 ) y , where R 1 and R 2 independently selected from C1-C4 alkyl, R 3 Represents a polyether structure, Me represents a methyl group, x=2-3, and y=2-3.

2. The waterborne epoxy floor paint composition according to claim 1, wherein The general formula of the aminodialkoxysilane is R 4 R 5 Si(OR 6 )2, where R 4 is an amino-substituted C3-C10 alkyl group, R 5 is selected from C1-C4 alkyl or C6-C12 aromatic groups, R 6 Selected from C1-C4 alkyl.

3. The waterborne epoxy floor paint composition according to claim 1, wherein The capping agent is selected from hexamethyldisiloxane or dimethyl silicone oil with a viscosity of 3-10 mPa.s at 25°C.

4. The waterborne epoxy floor paint composition according to claim 1, wherein The alkaline catalyst is selected from one of tetramethylammonium hydroxide, siloxane ammonium salt, potassium hydroxide and siloxane potassium.

5. The waterborne epoxy floor paint composition according to claim 1, wherein The amine curing agent is selected from one or a combination of diethylenetriamine, tetraethylenepentamine, polyetheramine and hydroxyethylethylenediamine.

6. The waterborne epoxy floor paint composition according to claim 1, characterized in that, The solid content of the epoxy resin dispersion is 30-70%.

7. The waterborne epoxy floor paint composition according to claim 1, characterized in that, The epoxy resin dispersion is selected from epoxy resin aqueous solution or epoxy resin microemulsion.

8. The waterborne epoxy floor paint composition according to claim 1, wherein The diluent is a reactive diluent.

9. The waterborne epoxy floor paint composition according to claim 1, characterized in that, The curing accelerator is selected from tertiary amine compounds.

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