Color-developable waterborne polyurethane dust suppressant and preparation method thereof

Abstract

The invention discloses a color-developable waterborne polyurethane dust suppressant and a preparation method thereof, and belongs to the technical field of dust suppressant preparation, the color-developable waterborne polyurethane dust suppressant comprises the following components by weight: 5-20 parts of waterborne polyurethane, 1-10 parts of latex powder, 0.5-5 parts of organic wax, 0.5-5 parts of color paste, 0.5-3 parts of paper pulp, 0.5-3 parts of a thickener, 0.1-0.5 part of an auxiliary agent, 5-10 parts of a film forming auxiliary agent, and 70-90 parts of water. According to the dust suppressant, waterborne polyurethane serves as a film forming substance and can be combined with coal particles to form a film layer of 1 mm-2 mm, a formed cured film is high in strength, good in toughness and high in adhesive force, pulverized coal particles can be effectively isolated, wind and rain erosion can be resisted, the dust suppression period is long, certain hydrophobicity is achieved, the dust suppressant is not prone to being washed away, the service life is greatly prolonged, and the dust suppressant is suitable for being popularized and used. And the dust suppressant takes water as a dispersion medium, the VOC content is extremely low, the selected coloring agent is environment-friendly, no pollution is caused to soil and underground water, and the development direction of green chemistry is met.

Description

Technical Field

[0001] This invention belongs to the field of dust suppressant preparation technology, and particularly relates to a color-developing waterborne polyurethane dust suppressant and its preparation method. Background Technology

[0002] Dust can be divided into two categories based on particle size: large-diameter dust, which is heavier and settles easily, and small-diameter dust, which floats in the air as aerosols and is invisible to the naked eye. Dust contains various heavy metals, and suspended dust can adsorb various toxic substances, some of which are carcinogenic. This suspended dust, carrying toxic substances, drifts everywhere, severely polluting the environment we depend on for survival.

[0003] Coal, as a basic energy source, has long held a dominant position in my country. my country's coal reserves are relatively abundant, accounting for 11.6% of the world's total, making it the world's largest coal producer. However, the pollution generated during coal mining, utilization, and transportation has a serious impact on the environment.

[0004] In my country, coal transportation by rail is primarily done in open wagons. During transport, factors such as track conditions and wind pressure generated when trains pass each other can cause coal dust particles from the coal seam surface to be blown off the wagons and scattered onto the tracks, resulting in environmental pollution and waste of coal resources along the route. Furthermore, many loose coal storage yards are located in windy areas, and since the coal is stored in the open, the erosive effect of strong winds on the coal piles pollutes the surrounding environment. Therefore, seeking effective countermeasures to reduce coal pollution and strengthen environmental protection is imperative.

[0005] Most existing dust suppressants are cellulose-based. During spraying, because the dust suppressant is a colorless liquid, it is impossible to visually determine whether the spraying is uniform or whether there are any missed areas, resulting in uneven dust suppression effects. It is difficult to monitor and manage construction quality, and it is impossible to quickly assess the treated and untreated areas visually. It is also impossible to effectively trace the dust suppressant. When it is necessary to assess the durability of the dust suppressant or to re-spray, there is a lack of intuitive indicators. Furthermore, over time, the cellulose component in the dust suppressant will slowly degrade, causing the dust suppressant to lose its dust suppression effect. Summary of the Invention

[0006] The purpose of this invention is to address the problem that the cellulose component in existing dust suppressants gradually degrades, causing the dust suppressant to lose its dust-suppressing effect. Therefore, this invention proposes a color-developing waterborne polyurethane dust suppressant and its preparation method.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A color-developing waterborne polyurethane dust suppressant and its preparation method, comprising, by weight: 5-20 parts waterborne polyurethane, 1-10 parts latex powder, 0.5-5 parts organic wax, 0.5-5 parts color paste, 0.5-3 parts pulp, 0.5-3 parts thickener, 0.1-0.5 parts additives, 5-10 parts film-forming aids, and 70-90 parts water.

[0008] As a further description of the above technical solution: The waterborne polyurethane is produced by polymerizing a polyether polyol resin and a sulfonate polyester polyol through special treatment, reacting them with a silane copolymer, and then modifying them with polyvinyl alcohol.

[0009] As a further description of the above technical solution: The waterborne polyurethane has ultra-high elasticity and excellent permeability, and its NCO value ranges from 1 to 5%.

[0010] As a further description of the above technical solution: The latex powder is any one of the redispersible latex powders.

[0011] As a further description of the above technical solution: The organic wax is produced by modifying vaporized silica with organic wax using a special process. It has good dispersibility and excellent suspension properties, and its trade name is S-9000.

[0012] As a further description of the above technical solution: The pigment paste is made using a pure water system, where inorganic titanium dioxide and water are dispersed and mixed evenly using a nano-grinding machine to achieve a fineness at the nanoscale.

[0013] As a further description of the above technical solution: The pulp is fiber compressed pulp, which is biodegradable. When mixed with pigment, it can improve the color development effect and reduce the amount of pigment used.

[0014] As a further description of the above technical solution: The thickener is one or more of the following: waterborne polyurethane associative thickener, hydroxypropyl cellulose, and carboxymethyl cellulose.

[0015] As a further description of the above technical solution: The adjuvant is one or more of an antioxidant or an ultraviolet absorber.

[0016] A method for preparing a color-developing waterborne polyurethane dust suppressant specifically includes the following steps: S1. According to the formula and mass ratio, mix the pulp, latex powder and water at a speed of 1200 r / min for 30 min to ensure uniform mixing.

[0017] S2. Reduce the rotation speed to 800 r / min, and add waterborne polyurethane, organic wax, and associative thickener to the pre-dispersion in S1 according to the formula mass ratio. Maintain 800 r / min and disperse for 40 min.

[0018] S3. Reduce the rotation speed to 600 r / min, add the remaining water, UV absorber, and alcohol ester-12, maintain 600 r / min, and disperse for 15 min; S4. According to the formula and mass ratio, add the color paste, maintain 600 r / min, disperse for 20 min, discharge, seal and store to obtain a color-developing waterborne polyurethane dust suppressant.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The dust suppressant in this invention uses water-based polyurethane as the film-forming substance, which can combine with coal particles to form a 1mm-2mm film layer. The resulting cured film has high strength, good toughness, and strong adhesion, effectively isolating coal powder particles, resisting wind and rain erosion, and having a long dust suppression cycle. It also has a certain degree of hydrophobicity, making it difficult to be washed away, greatly improving its service life. Furthermore, the dust suppressant uses water as the dispersion medium, has extremely low VOC content, and the selected colorant is environmentally friendly, causing no pollution to soil and groundwater, which is in line with the development direction of green chemistry.

[0020] 2. The dust suppressant in this invention has a bright color, allowing construction workers to visually see the coverage area and uniformity of the spray, effectively preventing missed areas and repeated spraying, and greatly improving construction quality and efficiency. Managers can quickly identify treated areas through color, facilitating supervision and maintenance.

[0021] 3. The dust suppressant preparation method of the present invention is mild and requires no special equipment. It can be completed by conventional stirring and mixing, making it suitable for large-scale industrial production. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the process flow for a color-developing waterborne polyurethane dust suppressant and its preparation method proposed in this invention. Figure 2 The image shows the test data of a color-developing waterborne polyurethane dust suppressant and its preparation method proposed in this invention. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figure 1-2 Example 1

[0025] This invention provides a technical solution: a color-developing waterborne polyurethane dust suppressant and its preparation method, characterized in that, by weight, it comprises: 5 parts waterborne polyurethane, 1 part latex powder, 0.5 parts organic wax, 0.5 parts color paste, 0.5 parts pulp, 0.5 parts thickener, 0.1 parts additives, 5 parts film-forming aids, and 70 parts water.

[0026] Specifically, the waterborne polyurethane is produced by polymerizing a polyether polyol resin and a sulfonate polyester polyol through special treatment, reacting them with a silane copolymer, and then modifying them with polyvinyl alcohol.

[0027] Specifically, the waterborne polyurethane has ultra-high elasticity and excellent permeability, and its NCO value ranges from 1 to 5%.

[0028] Specifically, the latex powder is any one of the redispersible latex powders.

[0029] Specifically, the organic wax is produced by modifying vaporized silica with organic wax using a special process. It has good dispersibility and excellent suspension properties, and its trade name is S-9000.

[0030] Specifically, the pigment paste is made using a pure water system, where inorganic titanium dioxide and water are dispersed and mixed evenly using a nano-grinding machine to achieve a fineness at the nanoscale.

[0031] Specifically, the pulp is fiber compressed pulp, which is biodegradable. When mixed with color paste, it can improve the color development effect and reduce the amount of color paste used.

[0032] Specifically, the thickener is one or more of waterborne polyurethane associative thickener, hydroxypropyl cellulose, and carboxymethyl cellulose.

[0033] Specifically, the additive is one or more of an antioxidant or an ultraviolet absorber.

[0034] A method for preparing a color-developing waterborne polyurethane dust suppressant specifically includes the following steps: S1. According to the formula and mass ratio, mix the pulp, latex powder and water at a speed of 1200 r / min for 30 min to ensure uniform mixing; S2. Reduce the rotation speed to 800 r / min, and add waterborne polyurethane, organic wax and associative thickener to the pre-dispersion in S1 according to the formula mass ratio, and maintain 800 r / min for 40 min; S3. Reduce the rotation speed to 600 r / min, add the remaining water, UV absorber, and alcohol ester-12, maintain 600 r / min, and disperse for 15 min; S4. According to the formula and mass ratio, add the color paste, maintain 600 r / min, disperse for 20 min, discharge, seal and store to obtain a color-developing waterborne polyurethane dust suppressant.

[0035] Example 2 This invention provides a technical solution: a color-developing waterborne polyurethane dust suppressant and its preparation method, characterized in that, by weight, it comprises: 10 parts waterborne polyurethane, 4 parts latex powder, 2 parts organic wax, 2 parts color paste, 1.3 parts pulp, 1.3 parts thickener, 0.2 parts additives, 7.5 parts film-forming aids, and 75 parts water.

[0036] Specifically, the waterborne polyurethane is produced by polymerizing a polyether polyol resin and a sulfonate polyester polyol through special treatment, reacting them with a silane copolymer, and then modifying them with polyvinyl alcohol.

[0037] Specifically, the waterborne polyurethane has ultra-high elasticity and excellent permeability, and its NCO value ranges from 1 to 5%.

[0038] Specifically, the latex powder is any one of the redispersible latex powders.

[0039] Specifically, the organic wax is produced by modifying vaporized silica with organic wax using a special process. It has good dispersibility and excellent suspension properties, and its trade name is S-9000.

[0040] Specifically, the pigment paste is made using a pure water system, where inorganic titanium dioxide and water are dispersed and mixed evenly using a nano-grinding machine to achieve a fineness at the nanoscale.

[0041] Specifically, the pulp is fiber compressed pulp, which is biodegradable. When mixed with color paste, it can improve the color development effect and reduce the amount of color paste used.

[0042] Specifically, the thickener is one or more of waterborne polyurethane associative thickener, hydroxypropyl cellulose, and carboxymethyl cellulose.

[0043] Specifically, the additive is one or more of an antioxidant or an ultraviolet absorber.

[0044] A method for preparing a color-developing waterborne polyurethane dust suppressant specifically includes the following steps: S1. According to the formula and mass ratio, mix the pulp, latex powder and water at a speed of 1200 r / min for 30 min to ensure uniform mixing; S2. Reduce the rotation speed to 800 r / min, and add waterborne polyurethane, organic wax and associative thickener to the pre-dispersion in S1 according to the formula mass ratio, and maintain 800 r / min for 40 min; S3. Reduce the rotation speed to 600 r / min, add the remaining water, UV absorber, and alcohol ester-12, maintain 600 r / min, and disperse for 15 min; S4. According to the formula and mass ratio, add the color paste, maintain 600 r / min, disperse for 20 min, discharge, seal and store to obtain a color-developing waterborne polyurethane dust suppressant.

[0045] Example 3 This invention provides a technical solution: a color-developing waterborne polyurethane dust suppressant and its preparation method, characterized in that, by weight, it comprises: 15 parts waterborne polyurethane, 7 parts latex powder, 0.35 parts organic wax, 0.35 parts color paste, 2.1 parts pulp, 2.1 parts thickener, 0.35 parts additives, 8.5 parts film-forming aids, and 85 parts water.

[0046] Specifically, the waterborne polyurethane is produced by polymerizing a polyether polyol resin and a sulfonate polyester polyol through special treatment, reacting them with a silane copolymer, and then modifying them with polyvinyl alcohol.

[0047] Specifically, the waterborne polyurethane has ultra-high elasticity and excellent permeability, and its NCO value ranges from 1 to 5%.

[0048] Specifically, the latex powder is any one of the redispersible latex powders.

[0049] Specifically, the organic wax is produced by modifying vaporized silica with organic wax using a special process. It has good dispersibility and excellent suspension properties, and its trade name is S-9000.

[0050] Specifically, the pigment paste is made using a pure water system, where inorganic titanium dioxide and water are dispersed and mixed evenly using a nano-grinding machine to achieve a fineness at the nanoscale.

[0051] Specifically, the pulp is fiber compressed pulp, which is biodegradable. When mixed with color paste, it can improve the color development effect and reduce the amount of color paste used.

[0052] Specifically, the thickener is one or more of waterborne polyurethane associative thickener, hydroxypropyl cellulose, and carboxymethyl cellulose.

[0053] Specifically, the additive is one or more of an antioxidant or an ultraviolet absorber.

[0054] A method for preparing a color-developing waterborne polyurethane dust suppressant specifically includes the following steps: S1. According to the formula and mass ratio, mix the pulp, latex powder and water at a speed of 1200 r / min for 30 min to ensure uniform mixing; S2. Reduce the rotation speed to 800 r / min, and add waterborne polyurethane, organic wax and associative thickener to the pre-dispersion in S1 according to the formula mass ratio, and maintain 800 r / min for 40 min; S3. Reduce the rotation speed to 600 r / min, add the remaining water, UV absorber, and alcohol ester-12, maintain 600 r / min, and disperse for 15 min; S4. According to the formula and mass ratio, add the color paste, maintain 600 r / min, disperse for 20 min, discharge, seal and store to obtain a color-developing waterborne polyurethane dust suppressant.

[0055] Example 4 This invention provides a technical solution: a color-developing waterborne polyurethane dust suppressant and its preparation method, characterized in that, by weight, it comprises: 5-20 parts of waterborne polyurethane, 1-10 parts of latex powder, 5 parts of organic wax, 5 parts of color paste, 3 parts of pulp, 3 parts of thickener, 0.5 parts of additives, 10 parts of film-forming aid, and 90 parts of water.

[0056] Specifically, the waterborne polyurethane is produced by polymerizing a polyether polyol resin and a sulfonate polyester polyol through special treatment, reacting them with a silane copolymer, and then modifying them with polyvinyl alcohol.

[0057] Specifically, the waterborne polyurethane has ultra-high elasticity and excellent permeability, and its NCO value ranges from 1 to 5%.

[0058] Specifically, the latex powder is any one of the redispersible latex powders.

[0059] Specifically, the organic wax is produced by modifying vaporized silica with organic wax using a special process. It has good dispersibility and excellent suspension properties, and its trade name is S-9000.

[0060] Specifically, the pigment paste is made using a pure water system, where inorganic titanium dioxide and water are dispersed and mixed evenly using a nano-grinding machine to achieve a fineness at the nanoscale.

[0061] Specifically, the pulp is fiber compressed pulp, which is biodegradable. When mixed with color paste, it can improve the color development effect and reduce the amount of color paste used.

[0062] Specifically, the thickener is one or more of waterborne polyurethane associative thickener, hydroxypropyl cellulose, and carboxymethyl cellulose.

[0063] Specifically, the additive is one or more of an antioxidant or an ultraviolet absorber.

[0064] A method for preparing a color-developing waterborne polyurethane dust suppressant specifically includes the following steps: S1. According to the formula and mass ratio, mix the pulp, latex powder and water at a speed of 1200 r / min for 30 min to ensure uniform mixing; S2. Reduce the rotation speed to 800 r / min, and add waterborne polyurethane, organic wax and associative thickener to the pre-dispersion in S1 according to the formula mass ratio, and maintain 800 r / min for 40 min; S3. Reduce the rotation speed to 600 r / min, add the remaining water, UV absorber, and alcohol ester-12, maintain 600 r / min, and disperse for 15 min; S4. According to the formula and mass ratio, add the color paste, maintain 600 r / min, disperse for 20 min, discharge, seal and store to obtain a color-developing waterborne polyurethane dust suppressant.

[0065] Based on the test and application data of the above embodiments and comparative examples, the color-developing waterborne polyurethane dust suppressant provided by the present invention exhibits the following comprehensive test results: 1. Significant color development and visualization effects: The dust suppressants prepared in Examples 1-4 produce bright and uniform colors after film formation, forming a sharp contrast with the colorless film layer in the comparative examples. This characteristic makes the construction coverage area clearly visible, effectively solving the industry problem of missed spraying and re-spraying, and providing an intuitive and efficient visual basis for construction quality monitoring and subsequent maintenance.

[0066] 2. Superior dust suppression performance: The dust suppression efficiency of all embodiments reached over 96%, which is more than 1.5% higher than the comparative example. This indicates that while introducing color development function, the present invention fully maintains the excellent dust suppression performance of the waterborne polyurethane material itself. The resulting colored cured film has high bonding strength and good water resistance, and can effectively resist wind and rain erosion and fix dust for a long time.

[0067] 3. Excellent color stability: After 30 days of outdoor exposure testing, the colors of the products in the examples showed no significant change, proving the effectiveness of the color stabilizing agents (UV absorbers, antioxidants). This characteristic ensures the continuity of the visual management function throughout the entire effective lifespan of the dust suppressant.

[0068] 4. Environmental friendliness and application flexibility: The product uses water as the dispersion medium, has low VOC content, and the selected colorants are environmentally friendly, meeting green chemistry requirements. By simply changing the type of water-based pigment, dust suppressants of different colors can be flexibly prepared to meet the color coding needs of different scenarios and management requirements, resulting in a wide range of applications.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A color-developing waterborne polyurethane dust suppressant, characterized in that, By weight, it comprises: 5-20 parts waterborne polyurethane, 1-10 parts latex powder, 0.5-5 parts organic wax, 0.5-5 parts color paste, 0.5-3 parts pulp, 0.5-3 parts thickener, 0.1-0.5 parts additives, 5-10 parts film-forming aids, and 70-90 parts water.

2. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The waterborne polyurethane is produced by polymerizing a polyether polyol resin and a sulfonate polyester polyol through special treatment, reacting them with a silane copolymer, and then modifying them with polyvinyl alcohol.

3. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The waterborne polyurethane has ultra-high elasticity and excellent permeability, and its NCO value ranges from 1 to 5%.

4. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The latex powder is any one of the redispersible latex powders.

5. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The organic wax is produced by modifying vaporized silica with organic wax using a special process. It has good dispersibility and excellent suspension properties, and its trade name is S-9000.

6. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The pigment paste is made using a pure water system, where inorganic titanium dioxide and water are dispersed and mixed evenly using a nano-grinding machine to achieve a fineness at the nanoscale.

7. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The pulp is fiber compressed pulp, which is biodegradable. When mixed with pigment, it can improve the color development effect and reduce the amount of pigment used.

8. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The thickener is one or more of the following: waterborne polyurethane associative thickener, hydroxypropyl cellulose, and carboxymethyl cellulose.

9. The color-developing waterborne polyurethane dust suppressant according to claim 1, characterized in that, The adjuvant is one or more of an antioxidant or an ultraviolet absorber.

10. A method for preparing a color-developing waterborne polyurethane dust suppressant according to any one of claims 1-9, characterized in that, Specifically, the following steps are included: S1. According to the formula and mass ratio, mix the pulp, latex powder and water at a speed of 1200 r / min for 30 min to ensure uniform mixing; S2. Reduce the rotation speed to 800 r / min, and add waterborne polyurethane, organic wax and associative thickener to the pre-dispersion in S1 according to the formula mass ratio, and maintain 800 r / min for 40 min; S3. Reduce the rotation speed to 600 r / min, add the remaining water, UV absorber, and alcohol ester-12, maintain 600 r / min, and disperse for 15 min; S4. According to the formula and mass ratio, add the color paste, maintain 600 r / min, disperse for 20 min, discharge, seal and store to obtain a color-developing waterborne polyurethane dust suppressant.

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