High-gloss waterborne epoxy floor coating finish and method of making same

Abstract

The application discloses high-gloss water-based epoxy floor paint finish and a preparation method thereof. The high-gloss water-based epoxy floor paint finish comprises A component and B component; the mass ratio of the A component to the B component is 1-5:1-3; the A component comprises the following components in percentage by mass: 25%-35% of water-based epoxy curing agent, 17%-30% of deionized water, 0.5%-2.0% of dispersant, 0.5%-1.5% of wetting agent, 2.0%-5.0% of wax emulsion, 2.0%-5.0% of kaolin, 15.0%-30.0% of barite powder, 0.0%-5.0% of titanium white powder, 0.3%-0.5% of defoaming agent, 0.3%-0.6% of leveling agent and 3.0%-10.0% of water-based color paste; the B component is water-based epoxy resin emulsion; and the high-gloss water-based epoxy floor paint finish has excellent gloss, hardness and wear resistance.

Description

Technical Field

[0001] This invention relates to the field of waterborne epoxy floor coatings, specifically to a high-gloss waterborne epoxy floor coating topcoat and its preparation method. Background Technology

[0002] Currently, epoxy floor coatings are divided into oil-based and water-based epoxy floor coatings. Oil-based epoxy floor coatings have achieved mature and stable technology through years of development and hold a significant market share. Water-based epoxy floor coatings are environmentally friendly, have excellent performance, and with the national promotion of green environmental protection policies and the growing popularity of low-carbon and environmentally friendly concepts, water-based epoxy floor coatings are developing rapidly and gradually replacing oil-based epoxy floor coatings.

[0003] However, water-based epoxy floor coatings have not been able to completely replace oil-based epoxy floor coatings. A major reason for this is that water-based epoxy floor coatings on the market do not have the same hardness, wear resistance, and especially gloss as oil-based epoxy floor coatings, making it difficult to meet the needs of market development. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-gloss water-based epoxy floor coating topcoat with high gloss, good wear resistance, and high hardness.

[0005] The second objective of this invention is to provide a method for preparing a high-gloss waterborne epoxy floor coating topcoat.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] This invention provides a high-gloss waterborne epoxy floor coating topcoat, comprising component A and component B; by mass ratio, component A: component B = 1-5:1-3; component A, by mass percentage, comprises the following components: 25%-35% waterborne epoxy curing agent, 17%-30% deionized water, 0.5%-2.0% dispersant, 0.5%-1.5% wetting agent, 2.0%-5.0% wax emulsion, 2.0%-5.0% kaolin, 15.0%-30.0% barite powder, 0.0%-5.0% titanium dioxide, 0.3%-0.5% defoamer, 0.3%-0.6% leveling agent, and 3.0%-10.0% waterborne colorant; component B is a waterborne epoxy resin emulsion.

[0008] The high-gloss waterborne epoxy floor coating provided by this invention includes component A and component B. In component A, the selected barite powder and titanium dioxide can enhance the gloss, and the kaolin has good suspension properties, which can improve the scrub resistance, wear resistance and weather resistance of the coating. In addition, waterborne epoxy curing agent, dispersant, wetting agent and defoamer are used to mix it with component B. After curing, the resulting high-gloss waterborne epoxy floor coating has excellent gloss, hardness and wear resistance.

[0009] In a preferred embodiment, the high-gloss water-based epoxy floor coating topcoat is composed of component A and component B; by mass ratio, component A: component B = 1-3: 1-2.

[0010] In a preferred embodiment, component A, by mass percentage, comprises the following ingredients: 28%-35% waterborne epoxy curing agent, 17%-28% deionized water, 0.5%-2.0% dispersant, 0.5%-1.5% wetting agent, 2.0%-4.5% wax emulsion, 2.8%-5.0% kaolin, 25.0%-28.0% barite powder, 0.0%-5.0% titanium dioxide, 0.3%-0.4% defoamer, 0.3%-0.4% leveling agent, and 6.3%-7.2% waterborne color paste.

[0011] In a further preferred embodiment, component A, by mass percentage, comprises the following ingredients: 32%-35% waterborne epoxy curing agent, 17%-25% deionized water, 0.5%-2.0% dispersant, 0.5%-1.5% wetting agent, 2.0%-2.5% wax emulsion, 2.8%-5.0% kaolin, 25.0%-28.0% barite powder, 1.5%-5.0% titanium dioxide, 0.3%-0.4% defoamer, 0.3%-0.4% leveling agent, and 6.3%-6.7% waterborne colorant.

[0012] By controlling the components of component A within the above-mentioned preferred range, the resulting high-gloss waterborne epoxy floor coating has the highest gloss.

[0013] In a preferred embodiment, the waterborne epoxy curing agent is composed of aliphatic amine modified waterborne curing agent, alicyclic amine modified waterborne curing agent, and m-phenylenediamine modified waterborne curing agent, wherein the molar ratio of the aliphatic amine modified waterborne curing agent, the alicyclic amine modified waterborne curing agent, and the m-phenylenediamine modified waterborne curing agent is 0.1-0.5:1-1.5:1-1.5.

[0014] The waterborne epoxy curing agent of this invention is composed of aliphatic amine modified waterborne curing agent, alicyclic amine modified waterborne curing agent, and m-phenylenediamine modified waterborne curing agent. Among them, the m-phenylenediamine modified waterborne curing agent mainly provides hardness, abrasion resistance, and gloss; the alicyclic amine modified waterborne curing agent mainly provides weather resistance, anti-yellowing properties, gloss, and fast drying; and the aliphatic amine modified waterborne curing agent mainly provides flexibility and curing speed. With the synergy of the three, the hardness, abrasion resistance, and gloss of the obtained high-gloss waterborne epoxy floor coating are improved.

[0015] The fatty amine modified waterborne curing agent is CYDHD-208 from Sinopec Baling Petrochemical Co., Ltd.

[0016] The alicyclic amine modified waterborne curing agent is MH6278, a waterborne floor coating high-gloss fast-drying special curing agent from Bass Synthetic New Materials (Shenzhen) Co., Ltd.

[0017] The m-phenylenediamine modified waterborne curing agent is WE-8196 from Shandong Ruisan Chemical Technology Co., Ltd.

[0018] In a preferred embodiment, the dispersant is composed of a polyalkoxy comb copolymer and 2-methyl-2,4-pentanediol, wherein the mass ratio of the polyalkoxy comb copolymer to 2-methyl-2,4-pentanediol is 1-1.5:1.

[0019] In this invention, the dispersant is composed of polyalkoxy comb copolymer and 2-methyl-2,4-pentanediol. The polyalkoxy comb copolymer has high intramolecular order, which can effectively disperse fillers and improve the gloss of the coating. The 2-methyl-2,4-pentanediol has penetrability and good dispersibility for inorganic substances. Thus, the synergistic effect of the two improves the dispersibility of the components and enhances the gloss of the resulting coating.

[0020] In practical operation, polyalkoxy comb copolymers can be selected from Coadis of Shanghai Juncai Materials Technology Co., Ltd. TM BR 85.

[0021] In a preferred embodiment, the wetting agent is composed of polyether-modified silicone oil and a hydrophobic short-chain ethoxy compound. The mass ratio of the polyether-modified silicone oil to the hydrophobic short-chain ethoxy compound is 1:1.0-2.0.

[0022] In actual operation, the polyether-modified silicone oil can be selected from AKN-1070 wetting agent. AKN-1070 wetting agent provides strong wetting ability.

[0023] In practical operation, the hydrophobic short-chain ethoxy compound can be selected from AKN-1100 wetting agent. AKN-1100 wetting agent provides strong wetting ability, good color development, and increases gloss.

[0024] In a preferred embodiment, the wax emulsion is a high-density polyethylene wax emulsion.

[0025] In actual operation, the high-density polyethylene wax emulsion can be selected from the water-based wax emulsion H842 of Jiangxi Longhai Chemical Co., Ltd. Water-based wax emulsion H842 has good scratch resistance, significantly improves the scrub resistance of the coating film, has a particle size of 0.5-1μm, and has no effect on gloss.

[0026] In a preferred embodiment, the kaolin is ultrafine calcined kaolin.

[0027] In a preferred embodiment, the titanium dioxide is rutile titanium dioxide.

[0028] In a preferred embodiment, the particle size of the kaolin, barite powder, and titanium dioxide is 3000 mesh or larger.

[0029] Component B is an aqueous epoxy resin emulsion.

[0030] In a preferred embodiment, the aqueous epoxy resin emulsion is a polyetheramine-modified epoxy resin emulsion.

[0031] The inventors discovered that the epoxy floor coating topcoat obtained by using polyetheramine-modified epoxy resin emulsion has the best gloss.

[0032] Further preferred, the polyetheramine-modified epoxy resin emulsion is selected from polyetheramine-modified bisphenol A type epoxy resin emulsion and / or polyetheramine-modified phenolic epoxy resin emulsion.

[0033] In a preferred embodiment, the particle size of the aqueous epoxy resin emulsion is <0.5μm.

[0034] More preferably, the polyetheramine-modified bisphenol A type epoxy resin emulsion is selected from polyetheramine-modified low molecular weight bisphenol A type epoxy resin emulsion and / or polyetheramine-modified medium molecular weight bisphenol A type epoxy resin emulsion.

[0035] The polyetheramine-modified low molecular weight bisphenol A type epoxy resin emulsion can be selected from waterborne epoxy resins CYDW-125W50 and / or CYDW-425W50 from Baling Petrochemical Company.

[0036] The polyetheramine-modified medium molecular weight bisphenol A type epoxy resin emulsion can be selected from the waterborne epoxy resin CYDW-1135W50 of Baling Petrochemical Company.

[0037] The polyetheramine-modified phenolic epoxy resin emulsion can be selected from the waterborne epoxy resin CYDW-625W50 of Baling Petrochemical Company.

[0038] This invention also provides a method for preparing a high-gloss waterborne epoxy floor coating topcoat. First, waterborne epoxy curing agent, deionized water, wetting agent, and dispersant are added sequentially to a reaction vessel and stirred and dispersed at 500-1000 rpm for 10-20 minutes to obtain slurry A. Then, kaolin, barite powder, and titanium dioxide are added while stirring. After the addition is complete, the stirring speed is increased to 1500-2500 rpm and dispersion continues for 30-60 minutes to obtain slurry B. Next, defoamer, leveling agent, and waterborne colorant are added sequentially to slurry B, and the stirring speed is reduced to 500-1000 rpm and dispersion continues for 10-20 minutes to obtain slurry C. Slurry C is then filtered to obtain component A of the high-gloss waterborne epoxy floor coating topcoat. Finally, component A and component B are mixed evenly according to the specified ratio to obtain the high-gloss waterborne epoxy floor coating topcoat.

[0039] The preferred method is to filter slurry C through a 500-mesh filter to obtain component A of the high-gloss water-based epoxy floor coating topcoat.

[0040] Compared with the prior art, the beneficial effects of the present invention are:

[0041] This invention controls the crosslinking density and main film-forming agent performance by strictly controlling the selection of waterborne epoxy resin and waterborne epoxy curing agent. It also controls the morphology and performance of the paint by rigorously screening fillers and additives, strictly controlling the proportions of each component and the preparation process parameters. The resulting high-gloss waterborne epoxy floor coating has small particle size, smooth and uniform surface, good fluidity, high gloss, and excellent overall performance. It achieves a gloss level of over 95% at 60°, and its abrasion resistance at 750g / 500r is approximately a weight loss of 0.03g, approaching the abrasion resistance of oil-based epoxy floor coatings in GB / T22374-2008 "Floor Coating Materials". Its pencil hardness is 4H-5H, exceeding the pencil hardness performance of epoxy floor coatings in GB / T22374-2008 "Floor Coating Materials". Detailed Implementation

[0042] The present invention will be further described in detail below with reference to embodiments, but is not limited thereto. Of course, this should not be construed as limiting the scope of the invention; therefore, equivalent variations made in accordance with the claims of the present invention are still within the scope of the invention.

[0043] Example 1

[0044] A high-gloss water-based epoxy floor coating topcoat, comprising component A and component B.

[0045] The weight ratio of component A to component B is 1:1.

[0046] Component A is made from raw materials comprising the following weight percentages: 32% waterborne epoxy curing agent, 25% deionized water, 0.8% dispersant, 0.5% wetting agent, 2.5% wax emulsion, 2.8% kaolin, 28.0% barite powder, 1.5% titanium dioxide, 0.3% defoamer, 0.3% leveling agent, and 6.3% waterborne color paste.

[0047] The waterborne epoxy curing agents include CYDHD-208 from Sinopec Baling Petrochemical Co., Ltd., MH6278 from Bass Synthetic New Materials (Shenzhen) Co., Ltd., and WE-8196 from Shandong Ruisan Chemical Technology Co., Ltd., with a molar ratio of 0.5:1.5:1.2.

[0048] The dispersant is Coadis in a weight ratio of 1.2:1. TM BR 85 and 2-methyl-2,4-pentanediol.

[0049] The wetting agent is AKN-1070 wetting agent and AKN-1100 wetting agent in a weight ratio of 1:1.

[0050] The wax emulsion is H842.

[0051] The kaolin is ultrafine calcined kaolin.

[0052] The titanium dioxide is rutile titanium dioxide.

[0053] The ultrafine calcined kaolin, barite powder, and rutile titanium dioxide have a particle size of 1250 mesh or larger.

[0054] The B component is CYDW-1135W50.

[0055] The preparation method of component A of a high-gloss waterborne epoxy floor coating topcoat is as follows:

[0056] Step 1. Prepare the ingredients according to the above proportions.

[0057] Step 2. After preparing the materials, add water-based epoxy curing agent, deionized water, wetting agent and dispersant to the reactor in sequence, and disperse at a low speed of 500-1000 rpm for 10-20 minutes.

[0058] Step 3. While stirring, add kaolin, barite powder, and titanium dioxide to the slurry from Step 2. After adding all the ingredients, increase the stirring speed to 1500-2500 rpm and disperse at high speed for 30-60 minutes.

[0059] Step 4. After completing Step 3, add defoamer, leveling agent and water-based color paste to the slurry in sequence, and disperse at a low speed of 500-1000 rpm for 10-20 minutes.

[0060] Step 5. Filter the slurry from Step 4 through a 500-mesh filter. This yields Component A of the high-gloss waterborne epoxy floor coating of this invention.

[0061] Mix components A and B evenly according to the specified ratio to obtain the high-gloss water-based epoxy floor coating topcoat of the present invention.

[0062] Example 2

[0063] A high-gloss water-based epoxy floor coating topcoat, comprising component A and component B.

[0064] The weight ratio of component A to component B is 3:2.

[0065] Component A is made from raw materials comprising the following weight percentages: 35% waterborne epoxy curing agent, 17% deionized water, 2.0% dispersant, 1.5% wetting agent, 2.0% wax emulsion, 5.0% kaolin, 25.0% barite powder, 5.0% titanium dioxide, 0.4% defoamer, 0.4% leveling agent, and 6.7% waterborne color paste.

[0066] The waterborne epoxy curing agents include CYDHD-208 from Sinopec Baling Petrochemical Co., Ltd., fatty amine modified waterborne curing agent, MH6278 waterborne floor coating high-gloss fast-drying special curing agent from Bass Synthetic New Materials (Shenzhen) Co., Ltd., and WE-8196 from Shandong Ruisan Chemical Technology Co., Ltd., with a molar ratio of 0.2:1.5:1.5.

[0067] The dispersant is Coadis in a weight ratio of 1.5:1. TM BR 85 and 2-methyl-2,4-pentanediol.

[0068] The wetting agent is AKN-1070 wetting agent and AKN-1100 wetting agent in a weight ratio of 1:1.5.

[0069] The wax emulsion is H842.

[0070] The kaolin is ultrafine calcined kaolin.

[0071] The titanium dioxide is rutile titanium dioxide.

[0072] The ultrafine calcined kaolin, barite powder, and rutile titanium dioxide have a particle size of 1250 mesh or larger.

[0073] The B component is CYDW-625W506.

[0074] The preparation method of component A of a high-gloss waterborne epoxy floor coating topcoat is as follows:

[0075] Step 1. Prepare the ingredients according to the above proportions.

[0076] Step 2. After preparing the materials, add water-based epoxy curing agent, deionized water, wetting agent and dispersant to the reactor in sequence, and disperse at a low speed of 500-1000 rpm for 10-20 minutes.

[0077] Step 3. While stirring, add kaolin, barite powder, and titanium dioxide to the slurry from Step 2. After adding all the ingredients, increase the stirring speed to 1500-2500 rpm and disperse at high speed for 30-60 minutes.

[0078] Step 4. After completing Step 3, add defoamer, leveling agent and water-based color paste to the slurry in sequence, and disperse at a low speed of 500-1000 rpm for 10-20 minutes.

[0079] Step 5. Filter the slurry from Step 4 through a 500-mesh filter. This yields Component A of the high-gloss waterborne epoxy floor coating topcoat of the present invention.

[0080] Mix components A and B evenly according to the specified ratio to obtain the high-gloss water-based epoxy floor coating topcoat of the present invention.

[0081] Example 3

[0082] A high-gloss water-based epoxy floor coating topcoat, comprising component A and component B.

[0083] The weight ratio of component A to component B is 2:1.

[0084] Component A is made from raw materials comprising the following weight percentages: 28% waterborne epoxy curing agent, 28% deionized water, 1.5% dispersant, 1.0% wetting agent, 4.5% wax emulsion, 4.0% kaolin, 25.0% barite powder, 0.4% defoamer, 0.4% leveling agent, and 7.2% waterborne color paste.

[0085] The waterborne epoxy curing agents include CYDHD-208 from Sinopec Baling Petrochemical Co., Ltd., fatty amine modified waterborne curing agent, MH6278 waterborne floor coating high-gloss fast-drying special curing agent from Bass Synthetic New Materials (Shenzhen) Co., Ltd., and WE-8196 from Shandong Ruisan Chemical Technology Co., Ltd., with a molar ratio of 10.3:1.2:1.2.

[0086] The dispersant is Coadis in a 1:1 weight ratio. TM BR 85 and 2-methyl-2,4-pentanediol.

[0087] The wetting agent is AKN-1070 wetting agent and AKN-1100 wetting agent in a weight ratio of 1:2.

[0088] The wax emulsion is H842.

[0089] The kaolin is ultrafine calcined kaolin.

[0090] The titanium dioxide is rutile titanium dioxide.

[0091] The ultrafine calcined kaolin, barite powder, and rutile titanium dioxide have a particle size of 1250 mesh or larger.

[0092] The B component consists of CYDW-125W50 and CYDW-425W50 in a weight ratio of 1:1.

[0093] The preparation method of component A of a high-gloss waterborne epoxy floor coating topcoat is as follows:

[0094] Step 1. Prepare the ingredients according to the above proportions.

[0095] Step 2. After preparing the materials, add water-based epoxy curing agent, deionized water, wetting agent and dispersant to the reactor in sequence, and disperse at a low speed of 500-1000 rpm for 10-20 minutes.

[0096] Step 3. While stirring, add kaolin and barite powder to the slurry from Step 2. After adding, increase the stirring speed to 1500-2500 rpm and disperse at high speed for 30-60 minutes.

[0097] Step 4. After completing Step 3, add defoamer, leveling agent and water-based color paste to the slurry in sequence, and disperse at a low speed of 500-1000 rpm for 10-20 minutes.

[0098] Step 5. Filter the slurry from Step 4 through a 500-mesh filter. This yields Component A of the high-gloss waterborne epoxy floor coating topcoat of the present invention.

[0099] Mix components A and B evenly according to the specified ratio to obtain the high-gloss water-based epoxy floor coating topcoat of the present invention.

[0100] The present invention provides a high-gloss waterborne epoxy floor coating topcoat and its preparation method. The comparative data of the high-gloss waterborne epoxy floor coating topcoat and ordinary waterborne epoxy floor coatings on the market are shown in Table 1 below; some technical requirements for the topcoat of floor coating materials in GB / T22374-2008 "Floor Coating Materials" are shown in Table 2.

[0101] Table 1 Comparison of the present invention and ordinary water-based epoxy floor coatings on the market.

[0102] Performance indicators Example 1 Example 2 Example 3 Ordinary floor coatings on the market 60° gloss % 99 103 95 <60 Abrasion resistance 750g / 500r / g 0.035 0.028 0.032 ≤0.060 Pencil hardness H 4H 5H 4H ≥H

[0103] Table 2. Technical requirements for topcoats in GB / T22374-2008 "Floor Coating Materials"

[0104] Performance indicators Water-based Solvent type Abrasion resistance 750g / 500r / g ≤0.060 ≤0.030 Pencil hardness H ≥H ≥H

Claims

1. A high-gloss water-based epoxy floor coating topcoat, characterized in that: The product comprises component A and component B; by mass ratio, component A: component B = 1-5:1-3; component A, by mass percentage, contains the following components: 25%-35% waterborne epoxy curing agent, 17%-30% deionized water, 0.5%-2.0% dispersant, 0.5%-1.5% wetting agent, 2.0%-5.0% wax emulsion, 2.0%-5.0% kaolin, 15.0%-30.0% barite powder, 0.0%-5.0% titanium dioxide, 0.3%-0.5% defoamer, 0.3%-0.6% leveling agent, and 3.0%-10.0% waterborne color paste; component B is a waterborne epoxy resin emulsion. The waterborne epoxy curing agent is composed of aliphatic amine-modified waterborne curing agent, alicyclic amine-modified waterborne curing agent, and m-phenylenediamine-modified waterborne curing agent, wherein the molar ratio of the aliphatic amine-modified waterborne curing agent, alicyclic amine-modified waterborne curing agent, and m-phenylenediamine-modified waterborne curing agent is 0.1-0.5:1-1.5:1-1.5; The dispersant is composed of a polyalkoxy comb copolymer and 2-methyl-2,4-pentanediol, wherein the mass ratio of the polyalkoxy comb copolymer to 2-methyl-2,4-pentanediol is 1-1.5:1; The wetting agent is composed of polyether-modified silicone oil and hydrophobic short-chain ethoxy compound; wherein the mass ratio of polyether-modified silicone oil to hydrophobic short-chain ethoxy compound is 1:1.0-2.

0.

2. The high-gloss water-based epoxy floor coating topcoat according to claim 1, characterized in that: Component A, by mass percentage, consists of the following ingredients: 28%-35% waterborne epoxy curing agent, 17%-28% deionized water, 0.5%-2.0% dispersant, 0.5%-1.5% wetting agent, 2.0%-4.5% wax emulsion, 2.8%-5.0% kaolin, 25.0%-28.0% barite powder, 0.0%-5.0% titanium dioxide, 0.3%-0.4% defoamer, 0.3%-0.4% leveling agent, and 6.3%-7.2% waterborne color paste.

3. The high-gloss water-based epoxy floor coating topcoat according to claim 1, characterized in that: The high-gloss water-based epoxy floor coating is composed of component A and component B; by mass ratio, component A: component B = 1-3: 1-2.

4. A high-gloss water-based epoxy floor coating topcoat according to claim 1 or 2, characterized in that: The wax emulsion is a high-density polyethylene emulsion; The kaolin is ultrafine calcined kaolin; The titanium dioxide is rutile titanium dioxide; The kaolin, barite powder, and titanium dioxide have a particle size of 3000 mesh or larger.

5. A high-gloss water-based epoxy floor coating topcoat according to claim 1 or 2, characterized in that: The aqueous epoxy resin emulsion is a polyetheramine-modified epoxy resin emulsion; the polyetheramine-modified epoxy resin emulsion is selected from polyetheramine-modified bisphenol A type epoxy resin emulsion and / or polyetheramine-modified phenolic epoxy resin emulsion; the particle size of the aqueous epoxy resin emulsion is <0.5μm.