A kind of water-based solvent-free anti-skid and wear-resistant coating and preparation method thereof

Abstract

The invention discloses a water-based solvent-free anti-skid and wear-resistant coating, which comprises the following proportions by weight: 22 to 52 parts of polyacrylate emulsion; 32 to 40 parts of filler; 6 to 22 parts of polyurethane dispersion; 6 to 14 parts of anti-skid composite suspended particles; 9 to 15 parts of deionized water; and 4 to 7 parts of additives. Part of the anti-skid composite suspended particles in the coating are dispersed and evenly distributed on the paint surface in the form of convex points, thereby improving the wear resistance of the paint surface.

Description

Technical Field

[0001] The invention belongs to the field of floor coatings. Background Art

[0002] Water-based acrylic paint is environmentally friendly because it basically does not contain organic solvents and has very low VOC. Therefore, water-based acrylic floor paint is becoming more and more popular. Water-based acrylic floor paint is the most suitable for thick coating of cement concrete foundation. The thickness of thick coating is generally 2.5-3.0mm, and it can be applied in the form of self-leveling.

[0003] The existing water-based acrylic floor coating has the following defects: once the existing water-based coating is applied in a thick coating or self-leveling manner, the rough surface undulation of the original cement floor will not be reflected on the coating surface, and a smooth coating surface will eventually be formed. This smooth coating surface will cause the risk of slipping and falling on rainy days;

[0004] If sand or other particles are added to this paint to enhance the anti-slip ability of the paint surface, the density of sand is much greater than the paint itself, so the sand will automatically sink to the bottom after being added to the paint, and it will be difficult to form a uniform anti-slip raised structure on the surface by spreading it. At the same time, the sand surface has a high hardness, and the sand protrusions can easily scratch the soles of pedestrians. Summary of the invention

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a water-based solvent-free anti-skid and wear-resistant coating and a preparation method, so that some of the anti-skid composite suspended particles in the coating are discretely and evenly distributed on the paint surface in the form of convex points, thereby improving the wear resistance of the paint surface.

[0006] Technical solution: To achieve the above purpose, the present invention provides a water-based solvent-free anti-skid and wear-resistant coating, the proportions by weight are as follows:

[0007] Polyacrylate emulsion 22-52 parts;

[0008] 32-40 parts of filler;

[0009] 6-22 parts of polyurethane dispersion;

[0010] 6-14 parts of anti-skid composite suspended particles; 9-15 parts of deionized water; 4-7 parts of additives.

[0011] Furthermore, any single anti-skid composite suspension particle is an anti-skid composite suspension particle with an inner core particle covered with a layer of light anti-skid outer shell.

[0012] Furthermore, the core particles of the anti-skid composite suspension particles are silicate glass particles or aluminum-magnesium alloy particles; the lightweight anti-skid shell of the anti-skid composite suspension particles is one of polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC).

[0013] Furthermore, the anti-skid composite suspended particles can be suspended in an emulsion formed by mixing polyacrylate emulsion, filler, polyurethane dispersion, deionized water and additives.

[0014] Furthermore, the outer diameter of a single anti-skid composite suspension particle ranges from 2 mm to 3 mm.

[0015] Further, a method for preparing a water-based solvent-free anti-skid and wear-resistant coating:

[0016] Step 1, polyacrylate emulsion, filler, polyurethane dispersion, deionized water and additives are mixed in a preset ratio by multiple stirring steps to finally obtain a uniform target mixed emulsion;

[0017] Step 2, measuring the density ρ1 of the target mixed emulsion obtained in "Step 1";

[0018] Step 3, using a fluidized bed coating machine, uniformly coating one of molten fluidized polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC) with a total mass of M1 on the outer surface of discrete silicate glass particles with a total mass of M2, and rapidly cooling and solidifying, thereby coating the silicate glass particles, and finally obtaining a plurality of core particles coated with a layer of light anti-slip outer shell.

[0019] Step 4: subjecting the anti-skid composite suspended particles obtained in Step 3 to density gradient separation by density gradient separation method to select anti-skid composite suspended particles having a comprehensive density in the range of (ρ1-x%×ρ1) to (ρ1+x%×ρ1);

[0020] Step 5: Mix the anti-skid composite suspended particles selected in "Step 4" into the target mixed emulsion according to a preset ratio, and stir, so as to finally obtain an anti-skid and wear-resistant coating with suspended and uniformly distributed particles.

[0021] Furthermore, the value of x% is 2. When the molten fluid with a total mass of M1 in "Step 3" is polyethylene (PE), let the density of polyethylene (PE) be ρa; let the density of silicate glass particles be ρb; satisfy ρ1 = (M1 + M2) / (M 1 / ρa + M2 / ρb).

[0022] Beneficial effects: some of the anti-skid composite suspended particles in the paint surface formed by the coating of the present invention are discretely and evenly distributed on the paint surface of the coating in the form of convex points; the discrete and evenly distributed convex points on the cured paint surface have an anti-skid effect on pedestrians, especially on rainy days, which can effectively prevent pedestrians from falling; and because each anti-skid composite suspended particle is a structure in which a core particle is coated with a layer of lightweight anti-skid shell; the layer of polyethylene anti-skid shell coated on the outside of the core particle not only has an anti-skid effect, but also the texture of the polyethylene anti-skid shell is softer than stone or glass, and will not cause harm to the soles of pedestrians; at the same time, the harder silicate glass core particles in the polyethylene anti-skid shell effectively improve the strength and wear resistance of the paint surface convex points. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attached Figure 1 Schematic diagram of paint surface with different weight proportions of anti-slip composite suspended particles. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] A water-based solvent-free anti-skid and wear-resistant coating, mainly used for anti-skid floor surfaces, the proportions by weight are as follows:

[0026] 22-52 parts of polyacrylate emulsion; 32-40 parts of filler; 6-22 parts of polyurethane dispersion; 6-14 parts of anti-skid composite suspended particles; 9-15 parts of deionized water; 4-7 parts of additives. The anti-skid composite suspended particles can be suspended in an emulsion mixed with polyacrylate emulsion, filler, polyurethane dispersion, deionized water and additives.

[0027] The above 35-40 parts of filler are specifically composed of the following components: 14-30 parts of barium sulfate (baryte powder). Barium sulfate itself has a large density. It can be used as a pigment to improve the wear resistance of the coating and can also be used as a density regulator to keep the density of the target mixed emulsion obtained in "step 1" at 1.7 g / cm 3 Up to 1.8g / cm 3 range between; wollastonite powder 6-8 parts; quartz powder 4-14 parts; water-based polyethylene wax 1 part.

[0028] Any single anti-skid composite suspended particle in the above 6 to 14 portions is an anti-skid composite suspended particle with a core particle covered with a light anti-skid outer shell. The core particle of the anti-skid composite suspended particle is silicate glass or aluminum-magnesium alloy particle; the light anti-skid outer shell of the anti-skid composite suspended particle is one of polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC); the outer diameter of any single anti-skid composite suspended particle ranges from 2 mm to 3 mm.

[0029] The above 4 to 7 parts of additives are specifically composed of the following components: 0.3 to 0.5 parts of polyacrylate (as a dispersant); 0.3 to 0.5 parts of silicone defoamer; 1 part of bentonite (as a thickener); 0.3 parts of mildewcide; 0.3 to 1.1 parts of rheological additive; 2 to 4 parts of propylene glycol methyl ether acetate (as a film-forming additive, it has good solubility and stability, can effectively improve the fluidity of the coating, and thus improve the leveling performance of the paint film).

[0030] First embodiment: Based on the above components, the first embodiment of the water-based solvent-free anti-skid and wear-resistant coating is as follows in parts by weight:

[0031] Components Weight Polyacrylate emulsion 35 Polyurethane dispersion 9 water 14 Anti-slip composite suspended particles 6 Barium sulfate (baryte powder) 22 Wollastonite powder 7 Quartz powder 6 Water-based polyethylene wax 1 Polyacrylate 0.4 Silicone defoamer 0.4 Bentonite 1 Antifungal agent 0.3 Rheology additives 0.8 Propylene glycol methyl ether acetate 3

[0032] Second embodiment:

[0033] Based on the above components, the second embodiment of the water-based solvent-free anti-skid and wear-resistant coating is as follows in parts by weight:

[0034]

[0035]

[0036] Third embodiment:

[0037] On the basis of the above components, the first embodiment of the water-based solvent-free anti-skid and wear-resistant coating is as follows in parts by weight:

[0038] Components Weight Polyacrylate emulsion 35 Polyurethane dispersion 9 water 14 Anti-slip composite suspended particles 14 Barium sulfate (baryte powder) 22 Wollastonite powder 7 Quartz powder 6 Water-based polyethylene wax 1 Polyacrylate 0.4 Silicone defoamer 0.4 Bentonite 1 Antifungal agent 0.3 Rheology additives 0.8 Propylene glycol methyl ether acetate 3

[0039] The preparation method of the water-based solvent-free anti-skid and wear-resistant coating based on any one of the formulas in the above three embodiments is as follows:

[0040] Step 1, the weighed deionized water, polyacrylate, mildew inhibitor, bentonite and silicone defoamer are dispersed at a stirring speed of 1000r / min for 15min to obtain a mixed solution a, and then the weighed barium sulfate (baryte powder), wollastonite powder, quartz powder and aqueous polyethylene wax are added to the obtained mixed solution a, and dispersed at a stirring speed of 2000r / min for 20min to obtain a mixed solution b, and then the weighed polyacrylate emulsion, polyurethane dispersion, rheological additive and propylene glycol methyl ether acetate are added to the obtained mixed solution b, and dispersed at a stirring speed of 1000r / min for 15min to obtain the target mixed emulsion.

[0041] Step 2: Use a densitometer to measure the density ρ1 of the target mixed emulsion obtained in "Step 1". In this case, the actual measured ρ1 = 1.74 g / cm 3 .

[0042] Step 3, using a fluidized bed coating machine, uniformly coating one of molten fluidized polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC) with a total mass of M1 on the outer surface of discrete silicate glass particles with a total mass of M2 and uniform diameter, and rapidly cooling and solidifying, thereby coating the silicate glass particles, and finally obtaining a plurality of core particles coated with a layer of light anti-slip outer shell.

[0043] In this step, the molten fluid with a total mass of M1 is polyethylene (PE). Assuming the density of polyethylene (PE) is ρa, in this embodiment, ρa=0.94 g / cm 3 ; The density of silicate glass particles is ρb, and in this embodiment ρb = 2.4 g / cm 3 ; In order to make the density of all the anti-slip composite suspended particles obtained in this step as close to ρ1 as possible, the relationship between M1 and M2 satisfies ρ1=(M1+M2) / (M 1 / ρa+M2 / ρb), where ρ1, ρa, ρb are all known quantities; even so, since the fluidized bed coating machine cannot be completely precise in the coating process, among the several anti-slip composite suspended particles obtained in this step, there must be some anti-slip composite suspended particles whose comprehensive density is too different from ρ1 and cannot be suspended.

[0044] Step 4, subjecting the anti-skid composite suspended particles obtained in "Step 3" to density gradient separation by density gradient separation method, and selecting anti-skid composite suspended particles with a comprehensive density in the range of (ρ1-2%×ρ1) to (ρ1+2%×ρ1) (the purpose of setting a certain floating error is based on efficiency and cost considerations); at this time, the comprehensive density of each anti-skid composite suspended particle obtained is almost the same as the density of the target mixed emulsion obtained in "Step 1". Since the target mixed emulsion itself is viscous, a uniform and stable suspension effect can be achieved under the condition of similar comprehensive density.

[0045] Step 5, mixing the anti-skid composite suspended particles selected in "Step 4" into the target mixed emulsion obtained in "Step 1" according to the weight ratio, and stirring to obtain a water-based solvent-free anti-skid and wear-resistant coating with suspended and uniformly distributed particles; finally, the obtained water-based solvent-free anti-skid and wear-resistant coating is filled.

[0046] Directions:

[0047] Before use, the anti-skid composite suspended particles can be properly shaken or stirred to make the anti-skid composite suspended particles more evenly distributed in the paint; then, the paint can be thickly applied (brushing thickness 2.5-3.0 mm) on the ground by scraping, self-leveling, brushing, etc. to form a paint surface; during the curing process of the paint, the paint surface of the already brushed paint will automatically shrink inward due to water evaporation and other reasons, so that some of the anti-skid composite suspended particles in the paint are discretely and evenly distributed on the paint surface in the form of convex points; the discrete and evenly distributed convex points on the cured paint surface play an anti-skid role for pedestrians, especially on rainy days, which can effectively prevent pedestrians from falling; and because each anti-skid composite suspended particle is a structure in which a layer of light anti-skid shell is coated on the outer surface of the core particle; the layer of polyethylene anti-skid shell coated on the outer surface of the core particle not only plays an anti-skid role, but also the texture of the polyethylene anti-skid shell is softer than that of stone or glass, and will not cause harm to the soles of pedestrians; at the same time, the harder silicate glass core particles in the polyethylene anti-skid shell effectively improve the strength and wear resistance of the paint surface convex points.

[0048] like Figure 1 As shown, on the basis of the target mixed emulsion obtained in "Step 1", different weight portions of water-based solvent-free anti-skid and wear-resistant coatings were added and mixed, and the paint surface test according to the same "method of use" was compared as shown in the following table:

[0049]

[0050] It can be seen that when the amount of anti-skid composite suspended particles added (parts by weight) is within the range of 6 to 14 parts, the number and density of the convex points on the paint surface are moderate and uniform, and stable anti-skid performance can be formed.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a water-based solvent-free anti-skid and wear-resistant coating, characterized in that: Step 1, polyacrylate emulsion, filler, polyurethane dispersion, deionized water and additives are mixed in a preset ratio by multiple stirring steps to finally obtain a uniform target mixed emulsion; in: Polyacrylate emulsion 22-52 parts; 32-40 parts of filler; 6-22 parts of polyurethane dispersion; 9-15 parts of deionized water; 4-7 parts of auxiliary agent; Step 2, determining the density ρ1 of the target mixed emulsion obtained in "Step 1"; Step 3, using a fluidized bed coating machine to uniformly coat one of molten fluidized polyethylene (PE), polypropylene (PP) and polyvinyl chloride (PVC) with a total mass of M1 onto the outer surface of discrete silicate glass particles with a total mass of M2, and rapidly cool and solidify, thereby coating the silicate glass particles to finally obtain a plurality of core particles coated with a layer of light anti-slip outer shell. Step 4: Perform density gradient separation on the anti-skid composite suspended particles obtained in "Step 3" by density gradient separation method, and select the anti-skid composite suspended particles with a comprehensive density in the range of (ρ1-x%×ρ1) to (ρ1+x%×ρ1); Step 5, mixing the anti-skid composite suspended particles selected in "step 4" into the target mixed emulsion according to a preset ratio, and stirring, finally obtaining an anti-skid and wear-resistant coating with suspended and uniformly distributed particles; When the molten fluid with a total mass of M1 in the "step three" is polyethylene (PE), the density of polyethylene (PE) is ρa; the density of silicate glass particles is ρb; and ρ1 = (M1 + M2) / (M 1 / ρa + M2 / ρb).

2. The method for preparing a water-based solvent-free anti-skid and wear-resistant coating according to claim 1, characterized in that: The value of x is 2.

Images