LU500255B1

LU500255B1 - Water-based epoxy floor paint and preparation method thereof

Info

Publication number: LU500255B1
Application number: LU500255A
Authority: LU
Inventors: Feng Jiang; Xiaowei Yu; Guicheng Song; Jingjing Hou; Mingzhu Chen; Xiang Sun; Ying Yang
Original assignee: Jiangsu Kumho Yangnong Chemical Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-12-10

Abstract

A water-based epoxy floor paint and a preparation method thereof, which belongs to the technical field of epoxy resin coatings. The water-based epoxy floor paint includes a component A and a component B which are separately packaged in a mass ratio of (80-100): (44.8-123), where the component A is a water-based epoxy emulsion; in parts by mass, the component B includes 15-30 parts of water-based epoxy curing agent, 20-40 parts of water, 3-15 parts of pigment, 5-20 parts of filler, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-1 part of dispersant, 0.5-5 parts of toughening agent, 0.5-5 parts of rheological additive and 0.5-5 parts of curing accelerator. The present disclosure enables the components to work together in a specific ratio to make the water-based epoxy floor paint environmentally friendly, high in hardness, strong in chemical corrosion resistance, high in bonding strength and convenient for construction.

Description

DESCRIPTION WATER-BASED EPOXY FLOOR PAINT AND PREPARATION METHOD THEREOF TECHNICAL FIELD

[01] The present disclosure relates to the technical field of epoxy resin coatings, in particular to a water-based epoxy floor paint and a preparation method thereof.

BACKGROUND ART

[02] The epoxy resin paint widely used in modern buildings such as factories, shopping malls, garages and houses also has an important position in the floor industry due to its good adhesion to concrete, low volume shrinkage, high resistance against water, oil, chemical corrosion, stain and wear, high hardness, beautiful colors and easy maintenance.

[03] The epoxy floor paint includes solvent-based epoxy floor paint and water-based epoxy floor paint. The traditional solvent-based epoxy floor paint uses a large amount of volatile organic solvents, which are harmful to human health and the environment. When it is applied to a damp coating surface, it is prone to bubbling and falling off due to the poor air permeability of the coating film. With the development of the water-based coating technology and the improvement of people's awareness of environmental protection, it has become an inevitable trend to replace the solvent-based epoxy floor paint with the water-based epoxy floor paint. In addition to the excellent performance of the solvent-based epoxy floor paint, the water-based epoxy floor paint also has the following advantages. The water-based epoxy floor paint uses water as the dispersion medium and uses few volatile organic compounds (VOCs), with little impact on the environment. The coating film has a micro-porous structure after being cured, which allows the water vapor to penetrate while the liquid medium is retained, releasing the pressure of the water vapor in the substrate and preventing the coating film from bubbling and falling off. Therefore, the water-based epoxy floor paint is applicable for the humid environment, and it is convenient for construction because it does not require strict water content of the substrate.

[04] Chinese invention patent 201711173966 5 discloses a high-performance two-component water-based epoxy floor paint and a preparation method thereof. The floor paint includes two components, namely A and B. The component A includes the following raw materials by weight percentage: 30-40% of curing agent, 0.4-0.6% of defoamer, 0.2-4% of additive, 1-2% of wax, 4-40% of filler, 1-3% of color paste, and the balance being water. The component B is a liquid epoxy resin. This floor paint has a fast surface drying rate, desired acid, alkali and water resistance, but it has poor wear resistance and thermal stability. Chinese invention patent 201510894217.6 discloses a water-based epoxy floor coating and a preparation method thereof. The floor coating includes A and component Bs. In parts by mass, the component A includes 80-90 parts of low-molecular-weight liquid epoxy resin, 2-4 parts of modified compatible resin and 5-15 parts of reactive diluent. The component B includes 20-30 parts of water, 40-45 parts of water-based amine curing agent, 3-5 parts of functional resin, 3-18 parts of pigment, 10-25 parts of filler, 0.1-0.5 parts of defoamer and

0.1-0.3 parts of wetting and leveling agent. This floor coating has desired hardness and wear resistance, but the paint film has poor weather resistance, short pot life, and poor compatibility between the liquid epoxy resin and the water-based amine curing agent, resulting in uneven mixing during use.

SUMMARY

[05] An objective of the present disclosure is to provide a water-based epoxy floor paint and a preparation method thereof. The water-based epoxy floor paint is suitable for large-scale use in outdoor floors in various environments due to its excellent comprehensive performance, such as long pot life, convenient construction, and desired resistance to heat, humidity, wear, chemicals and oil.

[06] To achieve the objective of the present disclosure, the present disclosure provides the following technical solutions.

[07] The present disclosure provides a water-based epoxy floor paint, including a component A and a component B which are separately packaged in a mass ratio of (80-100):

(44.8-123), where

[08] the component A is a water-based epoxy emulsion;

[09] in parts by mass, the component B includes 15-30 parts of water-based epoxy curing agent, 20-40 parts of water, 3-15 parts of pigment, 5-20 parts of filler, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-1 part of dispersant, 0.5-5 parts of toughening agent, 0.5-5 parts of rheological additive and 0.5-5 parts of curing accelerator.

[10] Preferably, the water-based epoxy emulsion may include one or more from the group consisting of an acrylic-modified water-based epoxy emulsion, a polyethylene glycol-modified water-based epoxy emulsion, a polypropylene glycol-modified water-based epoxy emulsion and a polyetheramine-modified water-based epoxy emulsion.

[11] Preferably, the water-based epoxy curing agent may include one or more from the group consisting of an amine-modified water-based epoxy curing agent, a water-based polyamide curing agent, isophorone diamine and cyclohexanediamine.

[12] Preferably, the filler may include one or more from the group consisting of titanium dioxide, barium sulfate, talc powder, mica, quartz powder and alumina.

[13] Preferably, the leveling agent may include a modified silicone type leveling agent and/or an acrylic copolymer type leveling agent.

[14] Preferably, the dispersant may be a non-ionic wetting and dispersing agent.

[15] Preferably, the toughening agent may be a shell-core toughening agent.

[16] Preferably, the rheological additive may include one or more from the group consisting of a BYK-410 rheological additive, a BYK-430 rheological additive and a BYK-R605 rheological additive.

[17] Preferably, the curing accelerator may include one or more from the group consisting of 2-ethyl-4-methylimidazole, 2-methylimidazole, phenylimidazole and iron acetylacetonate.

[18] The present disclosure provides a preparation method for the water-based epoxy floor paint described in the above technical solution, including the following steps:

[19] packaging the water-based epoxy emulsion to obtain the component A of the water-based epoxy floor paint; and

[20] mixing the water-based epoxy curing agent, the water, the pigment, the filler, the leveling agent, the defoamer, the dispersant, the toughening agent, the rheological additive and the curing accelerator, then filtering and packaging to obtain the component B of the water-based epoxy floor paint.

[21] The present disclosure provides a water-based epoxy floor paint, including a component A and a component B which are separately packaged in a mass ratio of (80-100): (44.8-123), where the component A is a water-based epoxy emulsion; in parts by mass, the component B includes 15-30 parts of water-based epoxy curing agent, 20-40 parts of water, 3-15 parts of pigment, 5-20 parts of filler, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-1 part of dispersant, 0.5-5 parts of toughening agent, 0.5-5 parts of rheological additive and 0.5-5 parts of curing accelerator. The present disclosure uses the water-based epoxy emulsion as the component A, which compatibly works with the reagents in the component B in a specific ratio to make the water-based epoxy floor paint environmentally friendly, high in hardness, strong in chemical corrosion resistance, high in bonding strength and convenient for construction.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[22] The present disclosure provides a water-based epoxy floor paint. The water-based epoxy floor paint includes a component A and a component B which are separately packaged in a mass ratio of (80-100): (44.8-123).

[23] The component A is a water-based epoxy emulsion.

[24] In parts by mass, the component B includes 15-30 parts of water-based epoxy curing agent, 20-40 parts of water, 3-15 parts of pigment, 5-20 parts of filler, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-1 part of dispersant, 0.5-5 parts of toughening agent, 0.5-5 parts of rheological additive and 0.5-5 parts of curing accelerator.

[25] In the present disclosure, the mass ratio of the component A to the component B in the water-based epoxy floor paint is preferably (80-100):(44.8-123), more preferably

(80-100):(65-110). Further, the mass ratio of the component A to the component B in the water-based epoxy floor paint is preferably (80-100):(75-105), more preferably (85-95):(80-100).

[26] In the present disclosure, unless otherwise specified, the materials or reagents used all are commercially available products well known to those skilled in the art.

[27] In the present disclosure, the component A is a water-based epoxy emulsion. The water-based epoxy emulsion includes one or more from the group consisting of an acrylic-modified water-based epoxy emulsion, a polyethylene glycol-modified water-based epoxy emulsion, a polypropylene glycol-modified water-based epoxy emulsion and a polyetheramine-modified water-based epoxy emulsion. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the component A may be an acrylic-modified water-based epoxy emulsion, a polyethylene glycol-modified water-based epoxy emulsion, a polypropylene glycol-modified water-based epoxy emulsion or a polyetheramine-modified water-based epoxy emulsion. The component A may be a mixture of a polyetheramine-modified water-based epoxy emulsion and a polyethylene glycol-modified water-based epoxy emulsion (which are preferably in a mass ratio of 1:(3-4)). The component A may also be a mixture of a polypropylene glycol-modified water-based epoxy emulsion and an acrylic-modified water-based epoxy emulsion (which are preferably in a mass ratio of (7.5-8.5):1).

[28] In the present disclosure, a number-average molecular weight of polyethylene glycol in the polyethylene glycol-modified water-based epoxy emulsion is preferably 2,000-6,000, and may specifically be 2,000, 4,000 or 6,000. The number-average molecular weight of the polypropylene glycol in the polypropylene glycol-modified water-based epoxy emulsion is preferably 2,000-6,000, and may specifically be 2,000, 4,000 or 6,000. A number-average molecular weight of polyetheramine in the polyetheramine-modified water-based epoxy emulsion is preferably 200-400, more preferably 230-400.

[29] In the present disclosure, the water-based epoxy emulsion serves as a main component of the water-based epoxy floor paint. It ensures the smooth curing of the water-based epoxy floor paint under the action of the water-based epoxy curing agent and the curing accelerator, such that the paint film has desired thermal stability, wear resistance and weather resistance, etc.

[30] In the present disclosure, in parts by mass, the component B includes 15-30 parts, preferably 20-25 parts of water-based epoxy curing agent. In the present disclosure, the water-based epoxy curing agent includes one or more from the group consisting of an amine-modified water-based epoxy curing agent, a water-based polyamide curing agent, isophorone diamine and cyclohexanediamine. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the water-based epoxy curing agent may be an amine-modified water-based epoxy curing agent, a water-based polyamide curing agent, isophorone diamine or cyclohexanediamine. The water-based epoxy curing agent may be a mixture of cyclohexanediamine and an amine-modified water-based epoxy curing agent (which are preferably in a mass ratio of (4-6):1). The water-based epoxy curing agent may also be a mixture of a water-based polyamide curing agent and an amine-modified water-based epoxy curing agent (which are preferably in a mass ratio of 1:(1.5-2.5)).

[31] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 20-40 parts of water, preferably 25-37 parts, and more preferably 30-35 parts. The water is preferably deionized water.

[32] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 3-15 parts of pigment, preferably 5-10 parts. In the present disclosure, the pigment preferably includes an unsaturated polyester color paste and/or a water-based phthalocyanine color paste. The water-based phthalocyanine paste preferably includes one or more from the group consisting of a water-based phthalocyanine blue paste, a water-based phthalocyanine green paste and a water-based phthalocyanine yellow paste. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents, and those skilled in the art may determine the types or ratios according to the desired color of the product.

[33] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 5-20 parts of filler, preferably 10-15 parts. In the present disclosure, the filler preferably includes one or more from the group consisting of titanium dioxide, barium sulfate, talc powder, mica, quartz powder and alumina. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the filler may be titanium dioxide, barium sulfate, talc powder, mica, quartz powder or alumina. The filler may be a mixture of mica and titanium dioxide (which are preferably in a mass ratio of (1.8-2.2):1). The filler may also be a mixture of barium sulfate and quartz powder (which are preferably in a mass ratio of (0.8-1.2):1). The filler may also be a mixture of mica and quartz powder (which are preferably in a mass ratio of 1:(5-7)). In the present disclosure, the titanium dioxide, the barium sulfate, the talc powder, the mica and the quartz powder have a particle size of preferably independently < um, more preferably independently < 15 um. The alumina is preferably nano-scale alumina, that is, the alumina has a nano-scale particle size.

[34] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 0.1-1 part of leveling agent, preferably 0.4-0.6 parts. In the present disclosure, the leveling agent preferably includes a modified silicone type leveling agent and/or an acrylic copolymer type leveling agent. The modified silicone type leveling agent preferably includes one or more from the group consisting of a BYK-333 leveling agent, a Modaflow 9200 leveling agent and a BYK-302 leveling agent. The acrylic copolymer type leveling agent preferably includes one or more from the group consisting of a Modaflow Epsilon leveling agent, a KMT-5544 leveling agent and a BYK-381 leveling agent. When multiple reagents are used in the leveling agent, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the leveling agent may be a Modaflow Epsilon leveling agent, a BYK-333 leveling agent, a BYK-302 leveling agent, a KMT-5544 leveling agent, a Modaflow 9200 leveling agent or a BYK-381 leveling agent. The leveling agent may also be a mixture of a BYK-302 leveling agent and a KMT-5544 leveling agent (which are preferably in a mass ratio of (2.5-3.5):1).

[35] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 0.1-1 part of defoamer, preferably 0.4-0.6 parts. In the present disclosure, the defoamer preferably includes one or more from the group consisting of a BYK-012 defoamer, a BYK-014 defoamer, a TEGO 2290 defoamer and a DF-2307 defoamer. The defoamer may specifically be a BYK-012 defoamer, a BYK-014 defoamer, a TEGO 2290 defoamer or a DF-2307 defoamer.

[36] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 0.1-1 part of dispersant, preferably 0.4-0.6 parts. In the present disclosure, the dispersant is preferably a non-ionic wetting and dispersing agent. The non-ionic wetting and dispersing agent preferably includes one or more from the group consisting of a PE-100 wetting and dispersing agent, a DISPERBYK-191 wetting and dispersing agent, a TEGOPREN 5840 wetting and dispersing agent, a DISPERBYK-2012 wetting and dispersing agent and an XP30 wetting and dispersing agent. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the dispersant may be a PE-100 wetting and dispersing agent, a DISPERBYK-191 wetting and dispersing agent, a TEGOPREN 5840 wetting and dispersing agent, a DISPERBYK-2012 wetting and dispersing agent or an XP30 wetting and dispersing agent. In the present disclosure, the dispersant has strong capabilities of wetting and dispersing the pigment and the filler, which is beneficial to improve the color strength and storage stability of the floor paint.

[37] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 0.5-5 parts of toughening agent, preferably 1-3 parts. In the present disclosure, the toughening agent is preferably a shell-core toughening agent. The shell-core toughening agent preferably includes one or more from the group consisting of an E920 shell-core toughening agent, an FM-40 shell-core toughening agent and a methylmethacrylate-butadiene-styrene (MBS) shell-core toughening agent. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the shell-core toughening agent may be an E920 shell-core toughening agent, an FM-40 shell-core toughening agent or an MBS shell-core toughening agent. In the present disclosure, the toughening agent can reduce the brittleness of the paint film and improve the toughness thereof, thereby effectively preventing the paint film from cracking.

[38] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 0.5-5 parts of rheological additive, preferably 1-3 parts. In the present disclosure, the rheological additive preferably includes one or more from the group consisting of a BYK-410 rheological additive, a BYK-430 rheological additive and a BYK-R605 rheological additive. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the rheological additive may be a BYK-410 rheological additive, a BYK-430 rheological additive or a BYK-R605 rheological additive. In the present disclosure, the rheological additive can improve the fluidity of the product and make the product convenient for construction.

[39] In the present disclosure, based on the mass parts of the water-based epoxy curing agent, the component B includes 0.5-5 parts of curing accelerator, preferably 1-3 parts. In the present disclosure, the curing accelerator preferably includes one or more from the group consisting of 2-ethyl-4-methylimidazole, 2-methylimidazole, phenylimidazole and iron acetylacetonate. When multiple reagents are mixed, the present disclosure has no special limit on the specific types or ratios of the reagents. Specifically, the curing accelerator may be 2-ethyl-4-methylimidazole, 2-methylimidazole, phenylimidazole or iron acetylacetonate. In the present disclosure, the curing accelerator can greatly reduce the curing reaction temperature, which is beneficial to the rapid progress of the curing reaction.

[40] The present disclosure provides a preparation method for the water-based epoxy floor paint described in the above technical solution. The preparation method includes the following steps:

[41] Package the water-based epoxy emulsion to obtain the component A of the water-based epoxy floor paint.

[42] Mix the water-based epoxy curing agent, the water, the pigment, the filler, the leveling agent, the defoamer, the dispersant, the toughening agent, the rheological additive and the curing accelerator, then filter and package to obtain the component B of the water-based epoxy floor paint.

[43] The present disclosure packages the water-based epoxy emulsion to obtain the component A of the water-based epoxy floor paint. The present disclosure has no special limit on the packaging bag and specifications, and the packaging bag and specifications may be determined according to actual needs.

[44] The present disclosure mixes the water-based epoxy curing agent, the water, the pigment, the filler, the leveling agent, the defoamer, the dispersant, the toughening agent, the rheological additive and the curing accelerator, then filters and packages to obtain the component B of the water-based epoxy floor paint. In the present disclosure, the mixing is preferably carried out at 25-45°C under stirring. The present disclosure has no special limit on the mixing equipment, and a high-speed dispersing machine well known to those skilled in the art may be used. In the present disclosure, the mixing preferably includes: subject the water-based epoxy curing agent and the water to first mixing to obtain a first mixture; subject the first mixture, the filler and the pigment to second mixing to obtain a second mixture; and subject the second mixture, the leveling agent, the defoamer, the dispersant, the toughening agent, the rheological additive and curing accelerator to third mixing.

[45] In the present disclosure, the first mixing is preferably carried out at 400-600 r/min for 5-10 min. The second mixing is preferably carried out at 600-900 r/min for 15-20 min. The third mixing is preferably carried out at 1,000-1,200 r/min for 10-20 min. The present disclosure mixes the reagents through the above mixing methods and conditions, which is beneficial to fully and uniformly mix the reagents and prevent the aggregation of the reagents.

[46] After mixing the raw materials of the component B to obtain a mixture, the present disclosure filters and packages the mixture to obtain the component B of the water-based epoxy floor paint. In the present disclosure, a pore size of a filtering screen is preferably

120-200 mesh, more preferably 120-150 mesh. The present disclosure has no special limit on the packaging bag and specifications, and the packaging bag and specifications may be determined according to actual needs.

[47] The present disclosure has no special limit on the method of using the water-based epoxy floor paint, and the component A and the component B of the water-based epoxy floor paint may be mixed directly during use.

[48] To make the to-be-resolved technical problems, technical solutions and beneficial effects of the present disclosure clearer, the present disclosure is described in further detail below with reference to the examples. It should be understood that the examples described herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure.

[49] The weight of each reagent mentioned in the example of the present disclosure refers to the specific content of each reagent, and represents a proportional relationship between the weight of each reagent. Therefore, the proportional increase or reduction in the content of each reagent of the composition in the example of the present disclosure is within the scope disclosed in the example of the present disclosure.

[50] Example 1

[51] 1) In parts by mass, 100 parts of polyethylene glycol (number-average molecular weight 6,000)-modified water-based epoxy emulsion was packaged to obtain an component A of a water-based epoxy floor paint.

[52] 2) 30 parts of amine-modified water-based epoxy curing agent and 30 parts of deionized water were put into a reactor at 25°C, and a high-speed dispersing machine was started to mix at 600 r/min for 5 min to obtain a first mixture.

[53] 3) 12 parts of barium sulfate (with a particle size of 1,000 mesh) and 3 parts of unsaturated polyester color paste were added to the first mixture obtained in Step 2), and mixed at 800 r/min for 15 min to obtain a second mixture.

[54] 4) 0.1 parts of Modaflow Epsilon leveling agent, 1 part BYK-014 defoamer, 0.2 parts of PE-100 wetting and dispersing agent, 0.5 parts of E920 shell-core toughening agent,

2 parts of BYK-430 rheological additive and 5 parts of 2-methylimidazole were sequentially added to the second mixture obtained in Step 3), and mixed at 1,000 r/min for 20 min to obtain a third mixture.

[55] 5) The third mixture obtained in Step 4) was filtered by a 200-mesh filter to obtain a component B of the water-based epoxy floor paint.

[56] Example 2

[57] 1) In parts by mass, 85 parts of polypropylene glycol (number-average molecular weight 4,000)-modified water-based epoxy emulsion was packaged to obtain an component A of a water-based epoxy floor paint.

[58] 2) 20 parts of water-based polyamide curing agent and 40 parts of deionized water were put into a reactor at 40°C, and a high-speed dispersing machine was started to mix at 400 r/min for 10 min to obtain a first mixture.

[59] 3) 10 parts of mica (with a particle size of 1,000 mesh), 5 parts of titanium dioxide (with a particle size of 1,000 mesh) and 15 parts of water-based phthalocyanine color paste were added to the first mixture obtained in Step 2), and mixed at 600 r/min for 20 min to obtain a second mixture.

[60] 4) 1 part of BYK-333 leveling agent, 0.8 parts DF-2307 defoamer, 0.1 parts of DISPERBYK-191 wetting and dispersing agent, 0.5 parts of FM-40 shell-core toughening agent, 5 parts of BYK-R605 rheological additive and 0.5 parts of iron acetylacetonate were sequentially added to the second mixture obtained in Step 3), and mixed at 1,200 r/min for min to obtain a third mixture.

[61] 5) The third mixture obtained in Step 4) was filtered by a 150-mesh filter to obtain a component B of the water-based epoxy floor paint.

[62] Example 3

[63] 1) In parts by mass, 80 parts of acrylic-modified water-based epoxy emulsion was packaged to obtain a component A of a water-based epoxy floor paint.

[64] 2) 15 parts of isophorone diamine and 20 parts of deionized water were put into a reactor at 45°C, and a high-speed dispersing machine was started to mix at 500 r/min for 5 min to obtain a first mixture.

[65] 3) 20 parts of talc powder (with a particle size of 1,000 mesh), 3 parts of water-based phthalocyanine green paste and 2 parts of unsaturated polyester color paste were added to the first mixture obtained in Step 2), and mixed at 900 r/min for 15 min to obtain a second mixture.

[66] 4) 0.3 parts of BYK-302 leveling agent, 0.1 parts of KMT-5544 leveling agent, 0.5 parts of TEGO 2290 defoamer, 1 part of TEGOPREN 5840 wetting and dispersing agent, 5 parts of MBS shell-core toughening agent, 2 parts of BYK-410 rheological additive and 3 parts of 2-ethyl-4-methylimidazole were sequentially added to the second mixture obtained in Step 3), and mixed at 1,200 r/min for 20 min to obtain a third mixture.

[67] 5) The third mixture obtained in Step 4) was filtered by a 120-mesh filter to obtain a component B of the water-based epoxy floor paint.

[68] Example 4

[69] 1) In parts by mass, 20 parts of polyetheramine (number-average molecular weight 230)-modified water-based epoxy emulsion and 65 parts of polyethylene glycol (number-average molecular weight 2,000)-modified water-based epoxy emulsion were mixed and packaged to obtain a component A of a water-based epoxy floor paint.

[70] 2) 30 parts of amine-modified water-based epoxy curing agent and 35 parts of deionized water were put into a reactor at 25°C, and a high-speed dispersing machine was started to mix at 600 r/min for 10 min to obtain a first mixture.

[71] 3) 10 parts of barium sulfate (with a particle size of 1,000 mesh), 10 parts of quartz powder (with a particle size of 1,000 mesh) and 3 parts of water-based phthalocyanine yellow paste were added to the first mixture obtained in Step 2), and mixed at 600 r/min for min to obtain a second mixture.

[72] 4) 0.2 parts of Modaflow 9200 leveling agent, 0.2 parts of BYK-012 defoamer, 0.5 parts of DISPERBYK-2012 wetting and dispersing agent, 1 part of FM-40 shell-core toughening agent, 3 parts of BYK-430 rheological additive, 2 parts of BYK-410 rheological additive and 1 part of phenylimidazole were sequentially added to the second mixture obtained in Step 3), and mixed at 1,000 r/min for 15 min to obtain a third mixture.

[73] 5) The third mixture obtained in Step 4) was filtered by a 200-mesh filter to obtain a component B of the water-based epoxy floor paint.

[74] Example 5

[75] 1) In parts by mass, 100 parts of acrylic-modified water-based epoxy emulsion was packaged to obtain a component A of a water-based epoxy floor paint.

[76] 2) 25 parts of cyclohexanediamine, 5 parts of amine-modified water-based epoxy curing agent and 25 parts of deionized water were put into a reactor at 25°C, and a high-speed dispersing machine was started to mix at 400 r/min for 10 min to obtain a first mixture. [771 3) 2 parts of mica (with a particle size of 1,000 mesh), 12 parts of quartz powder (with a particle size of 1,000 mesh), 2 parts of nano-scale alumina and 15 parts of unsaturated polyester color paste were added to the first mixture obtained in Step 2), and mixed at 800 r/min for 15 min to obtain a second mixture.

[78] 4) 1 part of BYK-381 leveling agent, 0.1 parts of DF-2307 defoamer, 2 parts of XP30 wetting and dispersing agent, 0.3 parts of E920 shell-core toughening agent, 2 parts of BYK-410 rheological additive and 0.5 parts of phenylimidazole were sequentially added to the second mixture obtained in Step 3), and mixed at 1,000 r/min for 20 min to obtain a third mixture.

[79] 5) The third mixture obtained in Step 4) was filtered by a 200-mesh filter to obtain a component B of the water-based epoxy floor paint.

[80] Example 6

[81] 1) In parts by mass, 80 parts of polypropylene glycol (number-average molecular weight 4,000)-modified water-based epoxy emulsion and 10 parts of acrylic-modified water-based epoxy emulsion were mixed and packaged to obtain a component A of a water-based epoxy floor paint.

[82] 2) 10 parts of water-based polyamide curing agent, 18 parts of amine-modified water-based epoxy curing agent and 40 parts of deionized water were put into a reactor at

30°C, and a high-speed dispersing machine was started to mix at 600 r/min for 10 min to obtain a first mixture.

[83] 3) 5 parts of talc powder (with a particle size of 1,000 mesh) and 3 parts of water-based phthalocyanine blue paste were added to the first mixture obtained in Step 2), and mixed at 900 r/min for 15 min to obtain a second mixture.

[84] 4) 0.1 parts of BYK-302 leveling agent, 1 part DF-2307 defoamer, 0.8 parts of TEGOPREN 5840 wetting and dispersing agent, 1 part of E920 shell-core toughening agent, 3 parts of BYK-430 rheological additive and 0.5 parts of iron acetylacetonate were sequentially added to the second mixture obtained in Step 3), and mixed at 1,200 r/min for 15 min to obtain a third mixture.

[85] 5) The third mixture obtained in Step 4) was filtered by a 120-mesh filter to obtain a component B of the water-based epoxy floor paint.

[86] The water-based epoxy floor paints prepared in Examples 1 to 6 were subjected to performance tests and compared with commercially available products. The commercial products with model numbers MH-618, 53269 and MH-618 were purchased from Suzhou Meiguowang Flooring Materials Co., Ltd., and the commercial product with model number 53269 was purchased from Hangzhou Chengxiang Flooring Engineering Co., Ltd. Specifically, a paint film formed by drying a 200 um wet film was put into test. The test items and methods are illustrated as follows:

[87] 1. Pot life: The test was carried out at 25°C as per GB/T 31416-2015.

[88] 2. Heat and humidity resistance: The sample was placed at 70°C and 70% (relative humidity, RH) for 16 h; then its elongation at break and breaking strength were tested by a tensile testing machine as per GB/T 30776-2014.

[89] 3. Wear resistance: The test was carried out at 750 g / 500 r as per HG/T1768-1979.

[90] 4. Chemical and oil resistance: The test was carried out as per GB/T1763-1989.

[91] The test results are shown in Table 1.

[92]

[93] Table 1 Performance test results of water-based epoxy floor paints prepared in Examples 1 to 6 and commercially available products Heat and humidity resistance Wear Pot life Chemical and oil Sample Elongation at Breaking strength | resistance (min) resistance break (%) (MPa) (g/cm?) Example 164 388 3.4 0.031 No discoloration 1 Example 225 307 3.9 0.025 No discoloration 2 Example 188 310 33 0.023 No discoloration 3 Example 240 399 3.5 0.025 No discoloration 4 Example 178 318 3.6 0.026 Slight discoloration Example 201 301 2.8 0.030 No discoloration 6

[94] The above results show that the water-based epoxy floor paint of the present disclosure is suitable for large-scale use in outdoor floors in various environments due to its excellent comprehensive performance, such as long pot life, convenient construction, and desired resistance to heat, humidity, wear, chemicals and oil.

[95] The above description of the examples is intended to help understand the method and core idea of the present disclosure. It should be noted that several improvements and modifications may also be made by those of ordinary skill in the art without departing from the spirit of the present disclosure and fall within the scope of the claims of the present disclosure.

A plurality of amendments to the example is apparent to those skilled in the art, and general principles defined herein can be achieved in the other examples without departing from the spirit or scope of the present disclosure.

Thus, the present disclosure is not limited to the examples shown herein but falls within the widest scope consistent with the principles and novel features disclosed herein.

Claims

CLAIMS:

1. A water-based epoxy floor paint, comprising a component A and a component B which are separately packaged in a mass ratio of (80-100): (44.8-123), wherein the component A is a water-based epoxy emulsion; in parts by mass, the component B comprises 15-30 parts of water-based epoxy curing agent, 20-40 parts of water, 3-15 parts of pigment, 5-20 parts of filler, 0.1-1 part of leveling agent, 0.1-1 part of defoamer, 0.1-1 part of dispersant, 0.5-5 parts of toughening agent, 0.5-5 parts of rheological additive and 0.5-5 parts of curing accelerator.

2. The water-based epoxy floor paint according to claim 1, wherein the water-based epoxy emulsion comprises one or more from the group consisting of an acrylic-modified water-based epoxy emulsion, a polyethylene glycol-modified water-based epoxy emulsion, a polypropylene glycol-modified water-based epoxy emulsion and a polyetheramine-modified water-based epoxy emulsion.

3. The water-based epoxy floor paint according to claim 1, wherein the water-based epoxy curing agent comprises one or more from the group consisting of an amine-modified water-based epoxy curing agent, a water-based polyamide curing agent, isophorone diamine and cyclohexanediamine.

4. The water-based epoxy floor paint according to claim 1, wherein the filler comprises one or more from the group consisting of titanium dioxide, barium sulfate, talc powder, mica, quartz powder and alumina.

5. The water-based epoxy floor paint according to claim 1, wherein the leveling agent comprises a modified silicone type leveling agent and/or an acrylic copolymer type leveling agent.

6. The water-based epoxy floor paint according to claim 1, wherein the dispersant is a non-ionic wetting and dispersing agent.

7. The water-based epoxy floor paint according to claim 1, wherein the toughening agent is a shell-core toughening agent.

8. The water-based epoxy floor paint according to claim 1, wherein the rheological additive comprises one or more from the group consisting of a BYK-410 rheological additive, a BYK-430 rheological additive and a BYK-R605 rheological additive.

9. The water-based epoxy floor paint according to claim 1, wherein the curing accelerator comprises one or more from the group consisting of 2-ethyl-4-methylimidazole, 2-methylimidazole, phenylimidazole and iron acetylacetonate.

10. A preparation method for the water-based epoxy floor paint according to any one of claims 1 to 9, comprising the following steps: packaging the water-based epoxy emulsion to obtain the component A of the water-based epoxy floor paint; and mixing the water-based epoxy curing agent, the water, the pigment, the filler, the leveling agent, the defoamer, the dispersant, the toughening agent, the rheological additive and the curing accelerator, then filtering and packaging to obtain the component B of the water-based epoxy floor paint.