Novel anticorrosive paint with active fire extinguishing function

Abstract

The invention belongs to the technical field of paint products, and particularly relates to novel anticorrosive paint with an active fire extinguishing function, which is prepared from the following components in parts by mass: 20-30 parts of water; 20-30 parts of pigment and filler; 10 to 20 parts of fluorosilicone modified styrene-acrylic emulsion; 20 to 30 parts of inorganic potassium silicate; 0.1 to 1 part of a thickening agent; 0.1-1 part of a dispersant; 0.1 to 1 part of a defoaming agent; 0.1-1 part of a wetting agent; 0.1-1 part of a stabilizer; and 0.1-1 part of a fire extinguishing agent microcapsule. The fire extinguishing agent microcapsule is added to prepare the water-based product fire extinguishing anticorrosive paint with an active fire extinguishing function, and the water-based product fire extinguishing anticorrosive paint is more environment-friendly than traditional anticorrosive paint.

Description

Technical Field

[0001] The invention belongs to the technical field of paint products, and in particular relates to a novel anti-corrosion paint with an active fire extinguishing function. Background Art

[0002] Corrosion is a destructive erosion caused by chemical or electrochemical reactions between metals and their surroundings. Compared to earth-shattering natural disasters like earthquakes and typhoons, corrosion occurs silently, making its harmful effects easily overlooked. However, the destructive power of corrosion is far more severe than the losses caused by natural disasters. Corrosion not only consumes resources, but also pollutes the environment and even endangers human health and safety. According to macroeconomic statistics and surveys, economic losses caused by corrosion account for approximately 3-4% of GDP each year, several times the losses caused by all natural disasters combined.

[0003] Anti-corrosion coatings, due to their excellent corrosion and rust prevention properties, are widely used in a wide range of fields, including steel structures and shipping, effectively preventing the severe waste of resources and energy caused by metal corrosion. Conventional water-based coatings, on the other hand, generally serve only a decorative purpose and lack any other specific functions. The moisture in these coatings can even accelerate steel corrosion, rendering them ineffective in preventing corrosion and rust. However, with the trend towards water-based coatings in the coatings industry, water-based anti-corrosion coatings are gaining increasing attention. Therefore, while maintaining the coating's anti-corrosion properties, adding active fire-extinguishing capabilities offers significant market potential and social value. Summary of the Invention

[0004] The present invention aims to overcome the above technical defects and provides a water-based anti-corrosion industrial paint, which has excellent water resistance, weather resistance, corrosion resistance, and stain resistance, as well as fire extinguishing function, low VOC and long service life.

[0005] The present invention provides a water-based anti-corrosion industrial paint with an active fire extinguishing function, the formula of which is as follows by mass ratio: 20-30 parts water; 20-30 parts of pigments and fillers; 10-20 parts of fluorosilicone modified styrene acrylic emulsion; 20-30 parts of inorganic potassium silicate; Thickener 0.1-1 part; Dispersant 0.1-1 part; 0.1-1 part of defoaming agent; Wetting agent 0.1-1 part; 0.1-1 part of stabilizer; 0.1 to 1 part of fire extinguishing agent microcapsules.

[0006] This application utilizes microencapsulation technology to encapsulate a fire extinguishing agent (such as ammonium phosphate, sodium bicarbonate, or a vaporized fire extinguishing agent) within microcapsules and disperse them within the anti-corrosion paint base. When the temperature reaches a critical value (e.g., above 150°C), the capsule shell melts or ruptures, releasing the fire extinguishing agent to interrupt the combustion chain reaction. This does not affect the normal anti-corrosion performance of the paint; the fire extinguishing agent is activated only in the event of a fire.

[0007] In some embodiments, the water-based anticorrosive industrial paint with active fire extinguishing capabilities of the present invention also contains a flame retardant, particularly one with dual anticorrosion properties. Examples include phosphorus-nitrogen flame retardants (e.g., ammonium polyphosphate), which provide both flame retardancy and metal corrosion inhibition; borates, which provide both flame retardancy and wood preservation; and nano-aluminum hydroxide or nano-magnesium hydroxide, which provide both flame retardancy and enhance coating density. By combining the flame retardant with the anticorrosive coating, this dual functionality is achieved.

[0008] In some embodiments, the pigments and fillers are mixed in the following ratio by weight: titanium dioxide: red iron oxide: sericite: silica powder: calcium carbonate = 1~2: 0.5~1: 0.5~1: 1.5~2.

[0009] In some embodiments, the potassium silicate solution is at least one of silica sol, silicate solution, and modified silicate solution.

[0010] In some embodiments, the stabilizer is a quaternary ammonium salt compound, such as at least one of Mingjia A60, Heye Chemical WJ-100, CROSFECT-CS1 and CROSFECT-CS2.

[0011] In some embodiments, the above-mentioned fluorosilicone-modified styrene acrylic emulsion is formulated in the following proportions by weight: 5-10 parts of styrene, 10-20 parts of methyl methacrylate, 20-30 parts of butyl acrylate, 5-10 parts of octafluoropentyl acrylate, 5-10 parts of methacryloxysilane, 0.1-2 parts of emulsifier, 0.1-2 parts of initiator, and 50-80 parts of deionized water.

[0012] In some embodiments, the emulsifier is a mixture of an anionic emulsifier and a nonionic emulsifier in a weight ratio of 1:1 to 2; and the initiator is at least one of potassium persulfate and sodium persulfate.

[0013] The present invention also provides a method for preparing a water-based anticorrosive industrial paint with an active fire extinguishing function, comprising the following steps: 1) Deionized water, emulsifier, and reaction monomer are added to a reactor by weight and stirred at high speed for 10 to 30 minutes. A 6 wt% solution of initiator and deionized water is prepared and slowly added dropwise to the reactor. The reaction is continued at high temperature for 2 to 4 hours, and then the reaction is stopped. The emulsion is cooled to room temperature to obtain a fluorosilicone-modified styrene-acrylic emulsion. 2) Deionized water, dispersant, wetting agent, thickener, 1 / 2 defoamer, and stabilizer are added to a dispersion kettle in order by weight and stirred evenly; titanium dioxide, red iron oxide, sericite, silica powder, and heavy calcium are then added to prepare a pre-slurry with a fineness of ≤60 μm; the fluorosilicone-modified styrene-acrylic emulsion obtained in step 1), inorganic potassium silicate, and fire extinguishing agent microcapsules are then added and dispersed evenly to obtain a water-based anti-corrosion industrial paint with active fire extinguishing function.

[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention adopts silicate-stabilized inorganic substances as auxiliary film-forming substances, thereby improving the hardness, wear resistance, corrosion resistance and weather resistance of the coating; by modifying the benzene emulsion with a fluorine-containing monomer, the coating has better water resistance and stain resistance; and by adding an organic siloxane as a cross-linking agent during polymerization in the emulsion, the emulsion has self-cross-linking ability, thereby reducing the addition of film-forming auxiliary agents.

[0015] Furthermore, the present invention provides a water-based anti-corrosion industrial paint with active fire extinguishing capabilities. If a fire occurs, the paint releases microcapsules of a fire extinguishing agent to extinguish the fire. The microcapsules primarily consist of a bio-based composite wall material and a core material containing the fire extinguishing agent. When the fire extinguishing agent encounters flames, the microcapsules rupture, releasing the agent and actively extinguishing the fire in its early stages.

[0016] Specific embodiment In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0017] Example 1: 1) Add 80 parts of deionized water, 0.2 parts of emulsifier, 5 parts of styrene, 10 parts of methyl methacrylate, 20 parts of butyl acrylate, 5 parts of octafluoropentyl acrylate, and 5 parts of methacryloxysilane to a reactor by weight and stir at high speed for 10 to 30 minutes. Add 0.1 parts of initiator to deionized water to prepare a 6 wt% solution, and slowly add it dropwise to the reactor. Continue to react at high temperature for 2 to 4 hours, then stop the reaction and wait until the emulsion cools to room temperature to obtain a fluorosilicone-modified styrene-acrylic emulsion. 2) Add 25 parts of deionized water, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.6 parts of thickener, 0.2 parts of defoamer, and 0.5 parts of stabilizer to a dispersion kettle in order by weight and stir evenly; then add 10 parts of titanium dioxide, 5 parts of red iron oxide, 6 parts of sericite, 5 parts of silica powder, and 15 parts of heavy calcium to prepare a pre-slurry with a fineness of ≤60 μm; then add 10 parts of the fluorosilicone-modified styrene-acrylic emulsion obtained in step 1), 20 parts of modified potassium silicate solution, and 5 parts of fire extinguishing agent microcapsules and disperse evenly to obtain a water-based anti-corrosion industrial paint with active fire extinguishing function.

[0018] Example 2: 1) Add 80 parts of deionized water, 0.2 parts of emulsifier, 5 parts of styrene, 10 parts of methyl methacrylate, 20 parts of butyl acrylate, 5 parts of octafluoropentyl acrylate, and 5 parts of methacryloxysilane to a reactor by weight and stir at high speed for 10 to 30 minutes. Add 0.1 parts of initiator to deionized water to prepare a 6 wt% solution, and slowly add it dropwise to the reactor. Continue to react at high temperature for 2 to 4 hours, then stop the reaction and wait until the emulsion cools to room temperature to obtain a fluorosilicone-modified styrene-acrylic emulsion. 2) According to weight, 25 parts of deionized water, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.6 parts of thickener, 0.2 1 part of defoamer and 0.5 part of stabilizer are added to a dispersion kettle and stirred evenly; then 10 parts of titanium dioxide, 5 parts of red iron oxide, 6 parts of sericite, 5 parts of silica powder and 15 parts of heavy calcium are added to prepare a pre-slurry with a fineness of ≤60μm; then 15 parts of fluorosilicone modified styrene acrylic emulsion obtained in step 1), 15 parts of modified potassium silicate solution and 5 parts of fire extinguishing agent microcapsules are added and dispersed evenly to obtain a water-based anti-corrosion industrial paint with active fire extinguishing function.

[0019] Example 3: 1) Add 80 parts of deionized water, 0.2 parts of emulsifier, 5 parts of styrene, 10 parts of methyl methacrylate, 20 parts of butyl acrylate, 5 parts of octafluoropentyl acrylate, and 5 parts of methacryloxysilane to a reactor by weight and stir at high speed for 10 to 30 minutes. Add 0.1 parts of initiator to deionized water to prepare a 6 wt% solution, and slowly add it dropwise to the reactor. Continue to react at high temperature for 2 to 4 hours, then stop the reaction and wait until the emulsion cools to room temperature to obtain a fluorosilicone-modified styrene-acrylic emulsion. 2) Add 25 parts of deionized water, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.6 parts of thickener, 0.2 parts of defoamer, and 0.5 parts of stabilizer to a dispersion kettle in order by weight and stir evenly; then add 10 parts of titanium dioxide, 5 parts of red iron oxide, 6 parts of sericite, 5 parts of silica powder, and 15 parts of heavy calcium to prepare a pre-slurry with a fineness of ≤60 μm; then add 5 parts of the fluorosilicone-modified styrene-acrylic emulsion obtained in step 1), 25 parts of modified potassium silicate solution, and 5 parts of fire extinguishing agent microcapsules and disperse evenly to obtain a water-based anti-corrosion industrial paint with active fire extinguishing function.

[0020] Example 4: 1) Add 80 parts of deionized water, 0.2 parts of emulsifier, 5 parts of styrene, 10 parts of methyl methacrylate, 20 parts of butyl acrylate, 5 parts of octafluoropentyl acrylate, and 5 parts of methacryloxysilane to a reactor by weight and stir at high speed for 10 to 30 minutes. Add 0.1 parts of initiator to deionized water to prepare a 6 wt% solution, and slowly add it dropwise to the reactor. Continue to react at high temperature for 2 to 4 hours, then stop the reaction and wait until the emulsion cools to room temperature to obtain a fluorosilicone-modified styrene-acrylic emulsion. 2) Add 25 parts of deionized water, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.6 parts of thickener, 0.2 parts of defoamer, and 0.5 parts of stabilizer to a dispersion kettle in order by weight and stir evenly; then add 10 parts of titanium dioxide, 6 parts of red iron oxide, 8 parts of sericite, 5 parts of silica powder, and 15 parts of heavy calcium to prepare a pre-slurry with a fineness of ≤60 μm; then add 10 parts of the fluorosilicone-modified styrene-acrylic emulsion obtained in step 1), 20 parts of modified potassium silicate solution, and 5 parts of fire extinguishing agent microcapsules and disperse evenly to obtain a water-based anti-corrosion industrial paint with active fire extinguishing function.

[0021] Comparative Example: 1) Add 80 parts by weight of deionized water, 0.2 parts of emulsifier, 5 parts of styrene, 10 parts of methyl methacrylate, 20 parts of butyl acrylate, and 5 parts of methacryloxysilane to a reactor and stir at high speed for 10 to 30 minutes. Add 0.1 parts of initiator to deionized water to prepare a 6 wt% solution, and slowly add it dropwise to the reactor. Continue to react at high temperature for 2 to 4 hours, then stop the reaction and wait until the emulsion cools to room temperature to obtain a self-crosslinked styrene-acrylic emulsion. 2) Add 25 parts of deionized water, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.6 parts of thickener, 0.2 parts of defoamer, and 0.5 parts of stabilizer to a dispersion kettle in order by weight and stir evenly; then add 10 parts of titanium dioxide, 5 parts of red iron oxide, 6 parts of sericite, 5 parts of silica powder, and 15 parts of heavy calcium to prepare a pre-slurry with a fineness of ≤60 μm; then add 10 parts of the self-crosslinking styrene-acrylic emulsion obtained in step 1) and 20 parts of modified potassium silicate solution and disperse evenly to obtain a water-based anti-corrosion industrial paint.

[0022] Examples 1-4 and Comparative Example 1 were tested against the relevant technical specifications of the industry standard HG / T5176-2017, "Water-Based Anticorrosion Coatings for Steel Structures." These tests confirmed that the products of the present invention met the relevant requirements for self-cleaning coatings and exhibited excellent paint film properties. The main performance indicators are shown in Table 1 (implemented in accordance with HG / T5176-2017).

[0023] Table 1 As can be seen from Table 1, Comparative Example 1, which does not include the fluorosilicone-modified styrene acrylic emulsion, has excellent adhesion and resistance to artificial weathering, but due to the strong hydrophilicity of potassium silicate, the paint film has poor water resistance and salt spray resistance. In contrast, Examples 1-4, to which fluorosilicone-modified styrene acrylic emulsions are added, have a lower surface energy due to the introduction of CF bonds and Si-O bonds, which can effectively hinder the penetration of corrosive media into the substrate, greatly improving its water resistance and salt spray resistance. Moreover, the product of the present invention is a water-based coating, and the addition of organic solvents such as film-forming aids and antifreeze is reduced through a special preparation method, and the content of organic volatiles is much lower than that specified in HG / T5176-2017 "Water-based anticorrosive coatings for steel structures". The addition of fire extinguishing agent microcapsules does not affect the performance of the anticorrosive coating itself.

[0024] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and changes without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A water-based anti-corrosion industrial paint with active fire extinguishing function, the formula of which is based on the mass ratio: 20-30 parts water; 20-30 parts of pigments and fillers; 10-20 parts of fluorosilicone modified styrene acrylic emulsion; 20-30 parts of inorganic potassium silicate; Thickener 0.1-1 part; Dispersant 0.1-1 part; 0.1-1 part of defoaming agent; Wetting agent 0.1-1 part; 0.1-1 part of stabilizer; 0.1 to 1 part of fire extinguishing agent microcapsules.

2. The water-based anticorrosive industrial paint with active fire extinguishing function according to claim 1, wherein: The pigment and filler are mixed in the following proportions by weight: titanium dioxide: red iron oxide: sericite: silica powder: calcium carbonate = 1~2:0.5~1:0.5~1:1.5~2.

3. The water-based anticorrosive industrial paint with active fire extinguishing function according to claim 1, wherein: The potassium silicate solution is at least one of silica sol, silicate solution and modified silicate solution.

4. The water-based anticorrosive industrial paint with active fire extinguishing function according to claim 1, wherein: The stabilizer is a quaternary ammonium salt compound, such as at least one of Mingjia A60, Heye Chemical WJ-100, Xinshou auxiliary agent CROSFECT-CS1 and CROSFECT-CS2.

5. The water-based anticorrosive industrial paint with active fire extinguishing function according to claim 1, wherein: The fluorosilicone-modified styrene-acrylic emulsion comprises the following proportions by weight: 5-10 parts of styrene, 10-20 parts of methyl methacrylate, 20-30 parts of butyl acrylate, 5-10 parts of octafluoropentyl acrylate, 5-10 parts of methacryloxysilane, 0.1-2 parts of emulsifier, 0.1-2 parts of initiator, and 50-80 parts of deionized water.

6. The water-based anticorrosive industrial paint with active fire extinguishing function according to claim 5, wherein: The emulsifier is a mixture of anionic emulsifier and nonionic emulsifier in a weight ratio of 1:1 to 2; the initiator is at least one of potassium persulfate and sodium persulfate.

7. The water-based anticorrosive industrial paint with active fire extinguishing function according to claim 1, wherein: The fire extinguishing agent is selected from ammonium phosphate, sodium bicarbonate or gasification type fire extinguishing agent.

8. A method for preparing a water-based anticorrosive industrial paint with active fire extinguishing function, comprising the following steps: 1) Deionized water, emulsifier, and reaction monomer are added to a reactor by weight and stirred at high speed for 10 to 30 minutes. A 6 wt% solution of initiator and deionized water is prepared and slowly added dropwise to the reactor. The reaction is continued at high temperature for 2 to 4 hours, and then the reaction is stopped. The emulsion is cooled to room temperature to obtain a fluorosilicone-modified styrene-acrylic emulsion. 2) Deionized water, dispersant, wetting agent, thickener, 1 / 2 defoamer, and stabilizer are added to a dispersion kettle in order by weight and stirred evenly; titanium dioxide, red iron oxide, sericite, silica powder, and heavy calcium are then added to prepare a pre-slurry with a fineness of ≤60 μm; the fluorosilicone-modified styrene-acrylic emulsion obtained in step 1), inorganic potassium silicate, and fire extinguishing agent microcapsules are then added and dispersed evenly to obtain a water-based anti-corrosion industrial paint with active fire extinguishing function.