High-gloss thin-coat long-acting anti-static polyurethane mortar floor paint and preparation thereof

Abstract

The application provides a polyurethane mortar floor paint, which comprises the following components: component A: high-functionality castor oil modified polyol, low-functionality castor oil modified polyol, surfactant, polyether polyol, water; component B: high-functionality castor oil modified polyol, low-functionality castor oil modified polyol, single-walled carbon nanotube, dispersant, surfactant, water; component C: isocyanate curing agent; component D: sand, cement, carbon dioxide absorbent; component E: color paste; the functionality of the high-functionality castor oil modified polyol is 2.0-3.5, and the viscosity of the high-functionality castor oil modified polyol at 25 DEG C is 200-1000 mPa.s; the functionality of the low-functionality castor oil modified polyol is 1-1.2, and the viscosity of the low-functionality castor oil modified polyol at 25 DEG C is lower than 40 mPa.s. The high-gloss long-acting anti-static polyurethane mortar floor paint has excellent and long-lasting conductive performance, can be thinned for construction, realizes high-gloss coating, and is suitable for more scenes.

Description

Technical Field

[0001] This invention belongs to the field of floor coating technology, specifically relating to a high-gloss, thin-coat, long-lasting antistatic polyurethane mortar floor coating and its preparation. Background Technology

[0002] Floor coatings are used to protect and decorate floors, and are widely used in parking lots, warehouses, shopping malls, factories, and other places. Based on different components, floor coatings can be divided into acrylic floor coatings, epoxy floor coatings, and polyurethane floor coatings. Among them, polyurethane floor coatings have advantages such as being environmentally friendly, having good resistance to high and low temperatures, strong adhesion, corrosion resistance, mildew resistance, and good waterproof performance, making them a relatively new type of floor coating in recent years.

[0003] Because flooring is subject to friction over a long period, it easily accumulates a large amount of static electricity, which can adversely affect the production process and may even cause safety accidents such as fires and explosions. Using anti-static floor paint is an effective way to avoid such accidents. However, most anti-static floor paint products on the market have different defects. For example, when using zinc oxide, mica powder, etc. as conductive fillers, the conductivity is poor, and the large amount added will affect the gloss of the paint film; adding graphene and conductive carbon black to conduct electricity also has the problem of poor conductivity and will darken the color of the paint film; adding quaternary ammonium salts to conduct electricity has poor conductivity, is easy to weaken, and the conductivity is not lasting, requiring repeated wiping; when adding conductive fibers, such as carbon fiber and glass fiber, the viscosity of the floor paint is high, making it impossible to apply in a thin layer, and because these additives rely on exposed fibers for conductivity, there are blind spots, and a high-gloss effect cannot be achieved; single-walled carbon nanotubes are a single-layer graphene roll structure, and can exhibit metallic or semiconductor properties based on the helical characteristics of space. Due to their strong carbon-carbon bonds, single-walled carbon nanotubes with metallic properties possess extremely high conductivity and a high current carrying capacity. However, because single-walled carbon nanotubes are difficult to disperse uniformly, some existing technologies also add a significant amount of single-walled carbon nanotubes (approximately 0.02% of the total mass of the floor coating) to ensure the antistatic performance of the floor coating meets requirements. This is combined with conductive fillers (conductive mica powder, conductive titanium dioxide, or conductive barium sulfate) and carbon fibers, making it impossible to simultaneously achieve high-gloss, thin-coat antistatic properties. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a high-gloss, thin-coat, long-lasting antistatic polyurethane mortar floor paint and its preparation method. This high-gloss, thin-coat, long-lasting antistatic polyurethane mortar floor paint has excellent and durable electrical conductivity, can be applied in thin coats, achieves high-gloss coating, and is suitable for more scenarios.

[0005] According to a first aspect of the present invention, a polyurethane mortar floor coating is provided, comprising the following components:

[0006] Component A: High-functionality castor oil modified polyol, low-functionality castor oil modified polyol, surfactant, polyether polyol, water;

[0007] Component B: High-functionality castor oil modified polyol, low-functionality castor oil modified polyol, single-walled carbon nanotubes, dispersant, surfactant, and water;

[0008] Component C: Isocyanate curing agent;

[0009] Component D: Sand, cement, carbon dioxide absorbent;

[0010] Component E: Pigment paste;

[0011] The high-functionality castor oil modified polyol has a functionality of 2.0 to 3.5, and its viscosity at 25°C is 200 to 1000 mPa·s.

[0012] The functionality of the low-functionality castor oil modified polyol is 1 to 1.2, and the viscosity of the low-functionality castor oil modified polyol at 25°C is less than 40 mPa·s.

[0013] Preferably, the hydroxyl value of the high-functionality castor oil modified polyol is 150-250 mg KOH / g; and / or, the acid value of the high-functionality castor oil modified polyol is below 3 mg KOH / g.

[0014] More preferably, the high-functionality castor oil modified polyol is at least one of Ito Oil's URIC H52, URICY406, and BASF's Sovermol 819.

[0015] Preferably, the hydroxyl value of the low-functionality castor oil modified polyol is 150-170 mg KOH / g; and / or, the acid value of the low-functionality castor oil modified polyol is below 3 mg KOH / g.

[0016] High-functionality castor oil-modified polyols react with isocyanate groups in isocyanate curing agents to form crosslinking agents; low-functionality castor oil-modified polyols mainly function as diluents.

[0017] Preferably, the viscosity of component A at 25°C is 200–400 mPa·s, and the viscosity of component B at 25°C is 4000–6000 mPa·s. Due to the high polarity of single-walled carbon nanotubes (SUVs), they do not dissolve well in either oil or aqueous phases. This invention additionally includes component B as a conductive slurry component, allowing the SUVs to be uniformly distributed in the continuous phase of the castor oil-modified polyol after combining with the dispersant, exhibiting thixotropic properties. Even after adding the aqueous phase and surfactant to form an oil-in-water system, the thixotropic properties are maintained, resulting in a stable system. If the raw materials of components A and B are directly mixed and dispersed, the castor oil-modified polyol continuous phase is excessive, leading to a low viscosity of the system and inability to uniformly disperse the SUVs, resulting in insufficient utilization of the SUVs and a system conductivity >1.0 × 10⁻⁶. 9 This makes it impossible to achieve antistatic properties for the system. In this case, to obtain an antistatic system (1.0*10...),... 6 <Conductivity<1.0*10 9 The only options are to increase the amount of single-walled carbon nanotubes or add other conductive media. However, excessive amounts of single-walled carbon nanotubes, conductive carbon powder, or conductive mica powder and other conductive fillers will reduce the gloss of the coating and make it impossible to achieve high-gloss coating. Adding carbon fiber will increase the viscosity of the system and make it impossible to achieve thin coating and high-gloss coating.

[0018] Preferably, the components A, B, C, D and E are composed in a mass ratio of (1.7-2.1):(0.4-0.8):(2.3-3.2):(8.2-10.2):(0.4-0.8).

[0019] Preferably, component A comprises the following raw materials in parts by weight: 35-45 parts of high-functionality castor oil modified polyol, 15-20 parts of low-functionality castor oil modified polyol, 0.5-1.5 parts of surfactant, 1-4 parts of polyether polyol, and 30-40 parts of water.

[0020] And / or, component B comprises the following raw materials in parts by weight: 50-60 parts of high-functionality castor oil modified polyol, 2-6 parts of low-functionality castor oil modified polyol, 0.05-0.1 parts of single-walled carbon nanotubes, 0.5-1.5 parts of surfactant, 0.02-0.05 parts of dispersant, and 30-40 parts of water;

[0021] And / or, the D component comprises the following raw materials in parts by weight: 75-85 parts sand, 10-15 parts cement, and 5-10 parts carbon dioxide absorbent.

[0022] Preferably, the dispersant is a modified styrene-maleic acid copolymer solution, wherein the modified styrene-maleic acid copolymer solution has an amine value of 18-20 mg KOH / g and an acid value of 8-10 mg KOH / g. This dispersant contains branched chains that anchor single-walled carbon nanotubes, effectively improving the dispersibility of single-walled carbon nanotubes in the system.

[0023] More preferably, the dispersant is BYK2013.

[0024] Preferably, the surfactant is sodium dioctyl sulfosuccinate. The surfactant serves to emulsify and stabilize the product.

[0025] More preferably, the surfactant is at least one of Huntsman's OT75, Hanker's HANERCHEM T-70, HANERCHEM T-75, and HANERCHEM T-100.

[0026] Preferably, the polyether polyol has a molecular weight of 500-3000 and a functionality of less than 3. The polyether polyol improves leveling and slows drying, promoting the formation of a smooth, high-gloss paint film.

[0027] More preferably, the polyether polyol is at least one of PPG500, PPG1000, PPG2000, and PPG3000.

[0028] Preferably, the single-walled carbon nanotubes are selected from a single-walled carbon nanotube pre-dispersion solution with a mass fraction of 5% to 10%. Since single-walled carbon nanotubes are difficult to disperse, using a single-walled carbon nanotube pre-dispersion solution helps to improve their dispersibility; while using a single-walled carbon nanotube pre-dispersion solution with a higher mass fraction can reduce its dosage and reduce the influence of the pre-dispersion solution solvent on the system of the present invention.

[0029] More preferably, the single-walled carbon nanotube pre-dispersion is at least one of TUBALL MATRIX 201, TUBALL MATRIX 208, or TUBALL MATRIX 301.

[0030] Preferably, the isocyanate curing agent has a viscosity of 100-500 mPa·s at 25°C and an isocyanate content of 30.5%-32.5%.

[0031] More preferably, the viscosity of the isocyanate curing agent at 25°C is 300-500 mPa·s.

[0032] More preferably, the isocyanate curing agent is a mixture of polymethylene polyphenyl isocyanate and diphenylmethane diisocyanate.

[0033] More preferably, the isocyanate curing agent is at least one of Wanhua's PM200 and PM400, Covestro's Desmodur 44V10L, Desmodur 44V20L, and Desmodur 44V40L, and BASF's Lupronat M20S.

[0034] Preferably, the sand is quartz sand.

[0035] Preferably, the sand in component D comprises the following components by mass: 40 to 60 parts of sand with a particle size of 0.1 to 0.5 mm and 10 to 30 parts of sand with a particle size of 0.3 to 0.8 mm.

[0036] Preferably, the cement is white cement. Cement has high mechanical properties, which can reinforce polyurethane floor coatings, giving the floor coating film good compressive strength and wear resistance. Using white cement with low iron content is also beneficial for achieving light-colored coatings.

[0037] Preferably, the cement is 525 cement.

[0038] Preferably, component A and component B also independently contain an antifoaming agent and a bactericide.

[0039] More preferably, component A and component B, by weight, also independently contain 0.5 to 1 part of defoamer and 0.1 to 0.2 parts of bactericide.

[0040] Preferably, the color paste is a general-purpose color paste.

[0041] According to a second aspect of the present invention, a method for preparing a polyurethane mortar floor coating as described in the first aspect of the present invention is provided, comprising the following steps:

[0042] (1) High-functionality castor oil modified polyol, low-functionality castor oil modified polyol, surfactant, polyether polyol and water are dispersed to obtain component A;

[0043] (2) Mix and disperse high-functionality castor oil modified polyol, low-functionality castor oil modified polyol, dispersant, and single-walled carbon nanotubes for 8-10 min, then add surfactant and water, and continue to disperse for 12-15 min to obtain component B.

[0044] (3) Weigh out sand, cement and carbon dioxide absorbent, mix them to obtain component D;

[0045] (4) After mixing components A, B and E, add components C and D in sequence while stirring to obtain polyurethane mortar floor paint.

[0046] The polyurethane mortar floor paint is applied and cured to obtain a high-gloss, thin-coat, long-lasting anti-static polyurethane mortar floor paint film.

[0047] Preferably, in step (1), high-functionality castor oil modified polyol, low-functionality castor oil modified polyol, surfactant, polyether polyol, defoamer, bactericide and water are evenly dispersed to obtain component A.

[0048] Preferably, in step (2), after mixing and dispersing the high-functionality castor oil modified polyol, the low-functionality castor oil modified polyol, the dispersant, and the single-walled carbon nanotubes for 8-10 minutes, the surfactant, the defoamer, the bactericide, and water are added, and the mixture is further dispersed for 12-15 minutes to obtain component B.

[0049] Preferably, in step (4), after adding component C and component D in sequence while maintaining stirring, stirring is continued for 1 to 2 minutes.

[0050] Preferably, in step (4), the stirring rate is 1500-2000 rpm.

[0051] Preferably, in step (1), the dispersion rate is 3000–4000 rpm; and / or, in step (2), the dispersion rate is 6000–8000 rpm. Component B contains a low content of single-walled carbon nanotubes, and these nanotubes are highly polar and difficult to disperse, requiring high-speed dispersion to achieve a good dispersion effect. Similarly, the mixing process of component B with the other components also requires relatively high-speed stirring (1500–2000 rpm); otherwise, the single-walled carbon nanotubes may still partially or completely agglomerate, affecting the conductivity.

[0052] According to one embodiment of the present invention, at least the following beneficial effects are achieved:

[0053] (1) The present invention prepares a stable single-walled carbon nanotube conductive slurry (component B), which has a shelf life of more than one year.

[0054] (2) The present invention adds castor oil modified polyol with low functionality, which effectively reduces the viscosity of the system and improves the fluidity of the system, which is beneficial for thin coating construction.

[0055] (3) The present invention adds polyether polyol, which improves the leveling properties of the system and is conducive to achieving high gloss of the coating film.

[0056] In summary, the high-gloss, thin-coat, long-lasting antistatic polyurethane mortar floor coating of this invention not only maintains excellent conductivity over a long period but also exhibits outstanding fluidity, meeting the requirements for thin-coat application. Furthermore, this invention solves the problem of decreased gloss caused by the addition of single-walled carbon nanotubes, resulting in a high-gloss appearance for the floor and enhancing the overall visual effect. This allows the product to protect the floor while also adding a decorative element. Detailed Implementation

[0057] The following will describe the concept and technical effects of the present invention clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of the present invention.

[0058] Unless otherwise specified, the raw materials, reagents or apparatus used in the following examples and comparative examples are available from conventional commercial sources or can be obtained by existing known methods.

[0059] Example 1

[0060] This embodiment provides a high-gloss, thin-coat, antistatic polyurethane mortar floor coating, comprising the following components by weight:

[0061] Component A: 40 parts of high-functionality castor oil modified polyol, 20 parts of low-functionality castor oil modified polyol, 0.8 parts of surfactant, 2 parts of polyether polyol, 0.5 parts of defoamer, 0.1 parts of bactericide, and 36.2 parts of water;

[0062] Component B: 55 parts of high-functionality castor oil modified polyol, 5 parts of low-functionality castor oil modified polyol, 1 part of surfactant, 0.03 parts of dispersant, 0.07 parts of single-walled carbon nanotubes, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.9 parts of water;

[0063] Component C: 100 parts of isocyanate curing agent;

[0064] Component D: 79 parts sand, 12 parts cement, and 9 parts carbon dioxide absorbent;

[0065] Component E: 100 parts color paste;

[0066] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0067] In this embodiment, the high-functionality castor oil modified polyol is URIC H52 from Ito Oil (hydroxyl value 195-205 mg KOH / g, viscosity at 25°C 580-680 mPa.s, functionality 3), and the low-functionality castor oil modified polyol is URIC H31 from Ito Oil (hydroxyl value 157-170 mg KOH / g, viscosity at 25°C less than 40 mPa.s, functionality 1). The surfactant is HANERCHEM T-75 from Hanko, the polyether polyol is PPG2000, the defoamer is Tego 944, the bactericide is BCT-2 from Guangzhou Dimei, the dispersant is BYK2013, and the single-walled carbon nanotubes are TUBALL MATRIX. 201 (content 10wt%), the isocyanate curing agent is Covestro's Desmodur 44V20L, the sand is quartz sand (of which 64 parts are 0.1-0.5 particle size and 15 parts are 0.3-0.8 particle size), the cement is 525 white cement, the carbon dioxide absorbent is calcium hydroxide, and the color paste is a water-oil universal color paste.

[0068] This embodiment also provides a method for preparing the high-gloss thin-coat antistatic polyurethane mortar floor paint as described above, including the following steps:

[0069] (1) Weigh out URIC H52, URIC H31, PPG2000, Tego 944, BCT-2, HANERCHEM T-75 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0070] (2) Weigh out URIC H52, URIC H31, BYK2013, and TUBALL MATRIX 201 and put them into a mixer. Disperse at 8000 rpm for 10 min. Then add HANERCHEM T-75, Tego 944, BCT-2 and water. Continue to disperse at 8000 rpm for 15 min to obtain component B.

[0071] (3) Weigh out quartz sand, 525 white cement and calcium hydroxide, put them into a mixer and mix them evenly to obtain component D;

[0072] (4) Add component A, component B and water-oil universal pigment into the paint bucket and mix evenly at a speed of 1500 rpm. Add Desmodur 44V20L and component D in sequence while stirring. After stirring for 1 minute, polyurethane mortar floor paint is obtained.

[0073] The storage stability of component B was tested as follows:

[0074] Component B was dispensed into two metal paint cans. Using an NDJ-1 rotary viscometer from Shanghai Lichen Bangxi Instrument Technology Co., Ltd., the viscosity of one sample at 25°C was measured to be 4200 mPa·s. The other sample was sealed and placed at 50°C for 30 days. Under the same test conditions, the viscosity of this sample at 25°C was measured to be 4780 mPa·s.

[0075] It can be seen that after 30 days at 50℃, the viscosity of component B changed by 13.8%, indicating excellent storage stability.

[0076] Example 2

[0077] This embodiment provides a high-gloss, thin-coat, antistatic polyurethane mortar floor coating, comprising the following components by weight:

[0078] Component A: 44 parts of high-functionality castor oil modified polyol, 18 parts of low-functionality castor oil modified polyol, 0.6 parts of surfactant, 2 parts of polyether polyol, 0.5 parts of defoamer, 0.1 parts of bactericide, and 34.9 parts of water;

[0079] Component B: 58 parts of high-functionality castor oil modified polyol, 3 parts of low-functionality castor oil modified polyol, 0.7 parts of surfactant, 0.04 parts of dispersant, 0.08 parts of single-walled carbon nanotubes, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.1 parts of water;

[0080] Component C: 100 parts of isocyanate curing agent;

[0081] Component D: 78 parts sand, 13 parts cement, and 9 parts carbon dioxide absorbent;

[0082] Component E: 100 parts color paste;

[0083] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0084] In this embodiment, the high-functionality castor oil modified polyols used are BASF's Sovermol 819 (hydroxyl value 230-250 mg KOH / g, viscosity at 25°C 750-950 mPa.s, functionality 2.6) and Ito Oil's URIC Y406 (hydroxyl value 155-175 mg KOH / g, viscosity at 25°C 230-270 mPa.s, functionality 2.2), and the low-functionality castor oil modified polyols used are Ito Oil's URIC H31 (hydroxyl value 157-170 mg KOH / g, viscosity at 25°C below 40 mPa.s, functionality 1). The surfactant used is Hanerchem T-100, the polyether polyol is PPG1000, the defoamer is Tego944, the bactericide is BCT-2, and the dispersant is BYK2013 (acid value 8 mg). KOH / g (amine value 18mg KOH / g), single-walled carbon nanotubes are TUBALL MATRIX 301 (content 10wt%), isocyanate curing agent is WANNATE PM200 from Wanhua, sand is quartz sand (of which 0.1-0.5 particle size accounts for 62 parts and 0.3-0.8 particle size accounts for 16 parts), cement is 525 white cement, carbon dioxide absorbent is calcium hydroxide, and color paste is water-oil universal color paste.

[0085] This embodiment also provides a method for preparing the high-gloss thin-coat antistatic polyurethane mortar floor paint as described above, including the following steps:

[0086] (1) Weigh out Sovermol 819, URIC Y406 (Sovermol 819:URIC Y406 = 30:14), URICH31, HANERCHEM T-100, PPG1000, Tego 944, BCT-2 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0087] (2) Weigh out Sovermol 819, URIC Y406 (Sovermol 819:URIC Y406 = 46:12), URICH31, BYK2013, and TUBALL MATRIX 301 and put them into a mixer. Disperse at 8000 rpm for 10 min, then add HANERCHEM T-100, Tego 944, BCT-2 and water, and continue to disperse at 8000 rpm for 15 min to obtain component B.

[0088] (3) Weigh out quartz sand, 525 white cement and calcium hydroxide, put them into a mixer and mix them evenly to obtain component D;

[0089] (4) Add component A, component B and water-oil universal pigment into the paint bucket and mix evenly at a speed of 1500 rpm. Add WANNATE PM200 and component D in sequence while stirring. After stirring for 1 minute, polyurethane mortar floor paint is obtained.

[0090] Comparative Example 1

[0091] This comparative example provides a polyurethane mortar floor coating, which differs from Example 1 in that component A does not contain polyether polyol, and includes the following components by weight:

[0092] Component A: 40 parts of high-functionality castor oil modified polyol, 20 parts of low-functionality castor oil modified polyol, 0.8 parts of surfactant, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.2 parts of water;

[0093] Component B: 55 parts of high-functionality castor oil modified polyol, 5 parts of low-functionality castor oil modified polyol, 1 part of surfactant, 0.03 parts of dispersant, 0.07 parts of single-walled carbon nanotubes, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.9 parts of water;

[0094] Component C: 100 parts of isocyanate curing agent;

[0095] Component D: 79 parts sand, 12 parts cement, and 9 parts carbon dioxide absorbent;

[0096] Component E: 100 parts color paste;

[0097] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0098] The raw materials used in this comparative example are from the same sources as those in Example 1.

[0099] This comparative example also provides a method for preparing the polyurethane mortar floor coating as described above, comprising the following steps:

[0100] (1) Weigh out URIC H52, URIC H31, HANERCHEM T-75, Tego 944, BCT-2 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0101] (2) Weigh out URIC H52, URIC H31, BYK2013, and TUBALL MATRIX 201 and put them into a mixer. Disperse at 8000 rpm for 10 min. Then add HANERCHEM T-75, Tego 944, BCT-2 and water. Continue to disperse at 8000 rpm for 15 min to obtain component B.

[0102] (3) Weigh out quartz sand, 525 white cement and calcium hydroxide, put them into a mixer and mix them evenly to obtain component D;

[0103] (4) Add component A, component B and water-oil universal pigment into the paint bucket and mix evenly at a speed of 1500 rpm. Add Desmodur 44V20L and component D in sequence while stirring, and keep stirring for 1 minute to obtain the final product.

[0104] Comparative Example 2

[0105] This comparative example provides a polyurethane mortar floor coating, which differs from Example 1 in that component A contains an excess of polyether polyol, including the following components by weight:

[0106] Component A: 40 parts of high-functionality castor oil modified polyol, 20 parts of low-functionality castor oil modified polyol, 0.8 parts of surfactant, 5 parts of polyether polyol, 0.5 parts of defoamer, 0.1 parts of bactericide, and 33.2 parts of water;

[0107] Component B: 55 parts of high-functionality castor oil modified polyol, 5 parts of low-functionality castor oil modified polyol, 1 part of surfactant, 0.03 parts of dispersant, 0.07 parts of single-walled carbon nanotubes, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.9 parts of water;

[0108] Component C: 100 parts of isocyanate curing agent;

[0109] Component D: 79 parts sand, 12 parts cement, and 9 parts carbon dioxide absorbent;

[0110] Component E: 100 parts color paste;

[0111] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0112] The raw materials used in this embodiment are from the same sources as in Example 1.

[0113] The preparation method of the polyurethane mortar floor paint as described above is the same as that in Example 1.

[0114] Comparative Example 3

[0115] This comparative example provides a polyurethane mortar floor coating, which differs from Example 2 in that the amount of low-functionality castor oil-modified polyol in component A is reduced, while the amount of high-functionality castor oil-modified polyol is increased by the same amount. It includes the following components by mass:

[0116] Component A: 56 parts of high-functionality castor oil modified polyol, 6 parts of low-functionality castor oil modified polyol, 0.6 parts of surfactant, 2 parts of polyether polyol, 0.5 parts of defoamer, 0.1 parts of bactericide, and 34.9 parts of water;

[0117] Component B: 58 parts of high-functionality castor oil modified polyol, 3 parts of low-functionality castor oil modified polyol, 0.7 parts of surfactant, 0.04 parts of dispersant, 0.08 parts of single-walled carbon nanotubes, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.1 parts of water;

[0118] Component C: 100 parts of isocyanate curing agent;

[0119] Component D: 78 parts sand, 13 parts cement, and 9 parts carbon dioxide absorbent;

[0120] Component E: 100 parts color paste;

[0121] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0122] The raw materials used in this comparative example are from the same sources as in Example 2.

[0123] This embodiment also provides a method for preparing the polyurethane mortar floor coating as described above, including the following steps:

[0124] (1) Weigh out Sovermol 819, URIC Y406 (Sovermol 819:URIC Y406 = 42:14), URICH31, HANERCHEM T-100, PPG1000, Tego 944, BCT-2 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0125] (2) Weigh out Sovermol 819, URIC Y406 (Sovermol 819:URIC Y406 = 46:12), URICH31, BYK2013, and TUBALL MATRIX 301 and put them into a mixer. Disperse at 8000 rpm for 10 min, then add HANERCHEM T-100, Tego 944, BCT-2 and water, and continue to disperse at 8000 rpm for 15 min to obtain component B.

[0126] (3) Weigh out quartz sand, 525 white cement and calcium hydroxide, put them into a mixer and mix them evenly to obtain component D;

[0127] (4) Add component A, component B and water-oil universal pigment into the paint bucket and mix evenly at a speed of 1500 rpm. Add WANNATE PM200 and component D in sequence while stirring, and keep stirring for 1 minute to obtain the final product.

[0128] Comparative Example 4

[0129] This comparative example provides a polyurethane mortar floor coating, which differs from Example 1 in that component B does not contain a dispersant and includes the following components by weight:

[0130] Component A: 40 parts of high-functionality castor oil modified polyol, 20 parts of low-functionality castor oil modified polyol, 0.8 parts of surfactant, 2 parts of polyether polyol, 0.5 parts of defoamer, 0.1 parts of bactericide, and 36.2 parts of water;

[0131] Component B: 55 parts of high-functionality castor oil modified polyol, 5 parts of low-functionality castor oil modified polyol, 1 part of surfactant, 0.07 parts of single-walled carbon nanotubes, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.9 parts of water;

[0132] Component C: 100 parts of isocyanate curing agent;

[0133] Component D: 79 parts sand, 12 parts cement, and 9 parts carbon dioxide absorbent;

[0134] Component E: 100 parts color paste;

[0135] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0136] The raw materials used in this comparative example are from the same sources as those in Example 1.

[0137] This comparative example also provides a method for preparing the polyurethane mortar floor coating as described above, comprising the following steps:

[0138] (1) Weigh out URIC H52, URIC H31, HANERCHEM T-75, PPG2000, Tego 944, BCT-2 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0139] (2) Weigh out URIC H52, URIC H31, and TUBALL MATRIX 201 and add them to a mixer. Disperse at 8000 rpm for 10 min. Then add HANERCHEM T-75, Tego 944, BCT-2, and water. Continue dispersing at 8000 rpm for 15 min to obtain component B. Since no dispersant was used, component B could not be dispersed and was not further processed.

[0140] Comparative Example 5

[0141] This comparative example provides a polyurethane mortar floor coating, which differs from Example 1 only in that the dispersant in component B is replaced with BYK190 (acid value 10 mg KOH / g, amine value 1 mg KOH / g).

[0142] Comparative Example 6

[0143] This comparative example provides a polyurethane mortar floor coating, which differs from Example 1 in that component B does not contain single-walled carbon nanotubes and dispersants, and includes the following components by weight:

[0144] Component A: 40 parts of high-functionality castor oil modified polyol, 20 parts of low-functionality castor oil modified polyol, 0.8 parts of surfactant, 2 parts of polyether polyol, 0.5 parts of defoamer, 0.1 parts of bactericide, and 36.2 parts of water;

[0145] Component B: 55 parts of high-functionality castor oil modified polyol, 5 parts of low-functionality castor oil modified polyol, 1 part of surfactant, 0.5 parts of defoamer, 0.1 parts of bactericide, and 38.9 parts of water;

[0146] Component C: 100 parts of isocyanate curing agent;

[0147] Component D: 79 parts sand, 12 parts cement, and 9 parts carbon dioxide absorbent;

[0148] Component E: 100 parts color paste;

[0149] The mass ratio of components A, B, C, D and E is 1.9:0.6:2.8:9.2:0.5.

[0150] The raw materials used in this comparative example are from the same sources as those in Example 1.

[0151] This comparative example also provides a method for preparing the polyurethane mortar floor coating as described above, comprising the following steps:

[0152] (1) Weigh out URIC H52, URIC H31, HANERCHEM T-75, PPG2000, Tego 944, BCT-2 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0153] (2) Weigh out URIC H52 and URIC H31 and put them into a mixer. After dispersing at 6000 rpm for 10 min, add HANERCHEM T-75, Tego 944, BCT-2 and water. Continue to disperse at 6000 rpm for 15 min to obtain component B.

[0154] (3) Weigh out quartz sand, 525 white cement and calcium hydroxide, put them into a mixer and mix them evenly to obtain component D;

[0155] (4) Add component A, component B and water-oil universal pigment into the paint bucket and mix evenly at a speed of 1500 rpm. Add Desmodur 44V20L and component D in sequence while stirring, and stir at high speed for 1 minute to obtain the final product.

[0156] Comparative Example 7

[0157] This comparative example provides a polyurethane mortar floor coating, which differs from Example 1 in that the raw materials of components A and B are combined to form a new component A, which includes the following components by mass parts:

[0158] Component A: 43.6 parts of high-functionality castor oil modified polyol, 16.4 parts of low-functionality castor oil modified polyol, 0.848 parts of surfactant, 1.52 parts of polyether polyol, 0.017 parts of single-walled carbon nanotubes, 0.008 parts of dispersant, 0.5 parts of defoamer, 0.1 parts of bactericide, and 36.848 parts of water;

[0159] Component C: 100 parts of isocyanate curing agent;

[0160] Component D: 79 parts sand, 12 parts cement, and 9 parts carbon dioxide absorbent;

[0161] Component E: 100 parts color paste;

[0162] The mass ratio of components A, C, D and E is 2.5:2.8:9.2:0.5.

[0163] The raw materials used in this comparative example are from the same sources as those in Example 1.

[0164] This comparative example also provides a method for preparing the polyurethane mortar floor coating as described above, comprising the following steps:

[0165] (1) Weigh out URIC H52, URIC H31, HANERCHEM T-75, PPG2000, BYK2013, TUBALL MATRIX201, Tego 944, BCT-2 and water, put them into a mixer and disperse them evenly at a speed of 4000 rpm to obtain component A;

[0166] (2) Weigh out quartz sand, 525 white cement and calcium hydroxide, put them into a mixer and mix them evenly to obtain component D;

[0167] (3) Add component A and water-oil universal pigment into the paint bucket and mix evenly at a speed of 1500 rpm. Add Desmodur 44V20L and component D in sequence while stirring, and stir at high speed for 1 minute to obtain the final product.

[0168] Test case

[0169] After applying the floor coatings prepared in the above embodiments and comparative examples, the performance of the resulting coating films was tested, and the results are shown in the table below.

[0170]

[0171]

[0172] Among them, the fluidity, compressive strength, flexural strength, hardness, surface resistivity and volume resistivity were tested in accordance with the standard GB / T22374-2018 "Floor Coating Materials", and the gloss was tested using the BGD515 / S gloss meter of Biaogeda Precision Instruments (Guangzhou) Co., Ltd.

[0173] As can be seen from the table above, the floor coatings of Examples 1 and 2 of this invention effectively balance fluidity, antistatic properties, and gloss, achieving a high-gloss thin coating. It can also be observed that although the amount of single-walled carbon nanotubes added in these examples is extremely low, it still significantly improves the antistatic effect of the floor coating. This is due to the excellent dispersion of single-walled carbon nanotubes in the mixed system of this invention, forming a continuous conductive network. Comparative Example 1, without the addition of polyether polyol PPG2000, showed a significant decrease in gloss compared to Example 1. Comparative Example 2, with the addition of excessive PPG2000, exhibited foaming in the slurry and poor surface finish, therefore no further testing was conducted. Comparative Example 3, without the addition of low-functionality castor oil-modified polyol H31, had poor slurry fluidity and surface finish, therefore no further testing was conducted. Comparative Example 4, without the addition of a dispersant, failed to disperse the conductive slurry (component B). In Comparative Example 5, the dispersant was replaced with BYK190. However, this dispersant lacked anchoring branches, resulting in poor dispersion of single-walled carbon nanotubes, leading to stratification after 3 days. No further testing was conducted; Comparative Example 6 did not add single-walled carbon nanotubes and therefore had no antistatic properties; In addition, although both Example 1 and Comparative Example 6 added polyether polyol PPG2000, it can still be seen that the single-walled carbon nanotubes added in Example 1 have a certain impact on the gloss of the system. From Example 1 and Comparative Example 1, it can be seen that in Comparative Example 1 without the addition of PPG2000, the effect of single-walled carbon nanotubes on the gloss of the system is more obvious, but the present invention effectively reduces this effect by adding polyether polyol; Comparative Example 7 combined components A and B in Example 1 into a new component A, and the single-walled carbon nanotubes were not effectively dispersed, resulting in no antistatic properties.

[0174] The embodiments of the present invention have been described in detail above with reference to the tables. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A polyurethane grout floor paint, characterized by, Includes the following components by mass: Component A: 35-45 parts of high-functionality castor oil modified polyol, 15-20 parts of low-functionality castor oil modified polyol, 0.5-1.5 parts of surfactant, 1-4 parts of polyether polyol, and 30-40 parts of water; Component B: 50-60 parts of high-functionality castor oil modified polyol, 2-6 parts of low-functionality castor oil modified polyol, 0.05-0.1 parts of single-walled carbon nanotubes, 0.02-0.05 parts of dispersant, 0.5-1.5 parts of surfactant, and 30-40 parts of water; Component C: Isocyanate curing agent; Component D: 75-85 parts sand, 10-15 parts cement, 5-10 parts carbon dioxide absorbent; Component E: Pigment paste; The polyurethane mortar floor coating is composed of components A, B, C, D and E in a mass ratio of (1.7~2.1):(0.4~0.8):(2.3~3.2):(8.2~10.2):(0.4~0.8). The high-functionality castor oil modified polyol has a functionality of 2.0 to 3.5, and its viscosity at 25°C is 200 to 1000 mPa·s. The functionality of the low-functionality castor oil modified polyol is 1~1.2, and the viscosity of the low-functionality castor oil modified polyol at 25°C is less than 40 mPa·s. The surfactant is sodium dioctyl sulfosuccinate; The dispersant is a modified styrene-maleic acid copolymer solution, wherein the amine value of the modified styrene-maleic acid copolymer solution is 18~20 mg KOH / g and the acid value is 8~10 mg KOH / g.

2. The polyurethane floor coating according to claim 1, characterized in that The polyether polyol has a molecular weight of 500-3000 and a functionality of less than 3.

3. The polyurethane grout floor paint according to claim 1, characterized in that, The single-walled carbon nanotubes are selected from a single-walled carbon nanotube pre-dispersion solution with a mass fraction of 5% to 10%.

4. The polyurethane grout floor paint according to claim 1, characterized in that, The isocyanate curing agent has a viscosity of 100~500 mPa.s at 25°C and an isocyanate content of 30.5%~32.5%.

5. The polyurethane grout floor paint according to claim 1, characterized in that, Component A and Component B also independently contain defoamers and bactericides.

6. A process for the production of a polyurethane floor coating according to any one of claims 1 to 5, characterized in that Includes the following steps: (1) High-functionality castor oil modified polyol, low-functionality castor oil modified polyol, surfactant, polyether polyol and water are dispersed to obtain component A; (2) After mixing and dispersing the high-functionality castor oil modified polyol, low-functionality castor oil modified polyol, dispersant, and single-walled carbon nanotubes for 8-10 min, add surfactant and water, and continue dispersing for 12-15 min to obtain component B. (3) Weigh out sand, cement, and carbon dioxide absorbent, mix them to obtain component D; (4) After mixing components A, B and E, add components C and D in sequence while stirring to obtain polyurethane mortar floor paint.

7. The production method according to claim 6, characterized by, In step (1), the dispersion rate is 3000~4000 rpm; and / or, in step (2), the dispersion rate is 6000~8000 rpm.

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