Environment-friendly water-based paint for aquaculture pond and preparation method thereof

Abstract

This invention belongs to the field of water-based paint preparation technology, specifically relating to an environmentally friendly water-based paint for aquaculture ponds and its preparation method. The preparation method provided by this invention includes the following steps: mixing polyethylene glycol monooleate, allyl glycol, and an alcohol solvent; then adding an initiator and heating to react, obtaining modified polyethylene glycol monooleate; mixing nano-silica, calcium carbonate powder, a dispersant, and water, and ultrasonically dispersing to obtain a premix; then adding polyacrylate emulsion, modified polyethylene glycol monooleate, a thickener, a film-forming agent, a defoamer, and a leveling agent to the premix, and stirring to obtain the environmentally friendly water-based paint. The water-based paint obtained by the method provided by this invention can greatly improve the adhesion of the environmentally friendly water-based paint to the substrate, while the paint film coating has excellent water resistance, low volatile organic compound content, and is environmentally friendly and safe.

Description

Technical Field

[0001] This invention belongs to the field of water-based paint preparation technology, specifically relating to an environmentally friendly water-based paint for aquaculture ponds and its preparation method. Background Technology

[0002] As people demand higher quality of life, safe and environmentally friendly paints are being used more and more widely. Compared with traditional paints, safe and environmentally friendly paints have advantages such as low toxicity and no serious harm to people's physical and mental health.

[0003] Water-based paints use water as a solvent and do not contain harmful substances such as benzene, formaldehyde, or toxic heavy metals. They also offer advantages such as water resistance, abrasion resistance, and fast drying, making them widely popular. Current water-based paints generally use water-based polyurethane or polyacrylate emulsions as the main component, which improves safety and provides stable chemical properties. However, using polyacrylate emulsions as the main component results in poor adhesion of the paint film to the substrate, reducing the application of water-based paints. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the paint film of the water-based paint obtained by using polyacrylate emulsion as the main component has poor adhesion to the substrate, and to provide an environmentally friendly water-based paint for aquaculture ponds and its preparation method.

[0005] To solve the above problems, the present invention provides the following solution:

[0006] A method for preparing an environmentally friendly water-based paint includes the following steps:

[0007] 1) Polyethylene glycol monooleate, allyl glycol and alcohol solvent are mixed, then an initiator is added and the mixture is heated to react, thus obtaining modified polyethylene glycol monooleate;

[0008] 2) Mix nano-silica, calcium carbonate powder, dispersant and water, and ultrasonically disperse to obtain a premixed liquid. Then add polyacrylate emulsion, modified polyethylene glycol monooleate, thickener, film-forming agent, defoamer and leveling agent to the premixed liquid, and stir to obtain the environmentally friendly water-based paint.

[0009] Preferably, the mass ratio of polyethylene glycol monooleate, allyl glycol, alcohol solvent and initiator is 1:(0.1-0.4):(0.4-0.8):(0.01-0.05).

[0010] Preferably, the heating reaction temperature is 75-80℃ and the heating reaction time is 3-6h.

[0011] Preferably, the mass ratio of nano silica, calcium carbonate powder, dispersant, water, polyacrylate emulsion, modified polyethylene glycol monooleate, thickener, film-forming agent, defoamer and leveling agent in step 2) is (3-5):(3-5):(1-3):(10-20):(78-85):(8-12):(1-3):(1-3):(1-2):(1-2).

[0012] Preferably, the alcohol solvent is isopropanol;

[0013] The initiator is selected from azobisisobutyronitrile.

[0014] Preferably, after the heating reaction is completed, the reaction solution is further subjected to vacuum rotary evaporation.

[0015] Preferably, the ultrasonic power in the ultrasonic dispersion step is 400-500W and the ultrasonic time is 20-60min.

[0016] Preferably, the stirring speed in the stirring and mixing step is 1200-1500 r / min, and the stirring and mixing time is 20-40 min.

[0017] Preferably,

[0018] The dispersant is selected from BYK190 and BYK690; the thickener is selected from RM2020; the film-forming agent is selected from PGDA; the defoamer is selected from W-082 and BYK024; and the leveling agent is selected from allyl hydroxyethyl ether and cellulose acetate butyrate leveling agent. In this invention, the dispersant BYK190 is selected from BYK190 of BYKK (Germany); the thickener RM2020 is selected from RM2020 of Rohm and Haas; the film-forming agent PGDA is propylene glycol diacetate; the defoamer W-082 is selected from Hemings Deqian defoamer W-082; the polyacrylate emulsion is selected from Rohm and Haas AC-261P; and the polyethylene glycol monooleate is selected from Haishihua PEG-400MO.

[0019] The present invention also provides an environmentally friendly water-based paint for aquaculture ponds, which is prepared by the preparation method described above.

[0020] The technical solution of this invention has the following advantages:

[0021] The method for preparing environmentally friendly water-based paint provided by this invention first involves modifying polyethylene glycol monooleate with allyl ethylene glycol, grafting allyl ethylene glycol onto polyethylene glycol monooleate to form modified polyethylene glycol monooleate with macromolecular side chains. This modified polyethylene glycol monooleate is then mixed with nano-silica, calcium carbonate, dispersant, water, polyacrylate emulsion, thickener, film-forming agent, defoamer, and leveling agent. The addition of modified polyethylene glycol monooleate not only facilitates the dispersion of particles such as nano-silica, but also, in conjunction with the dispersant, polyacrylate emulsion, thickener, film-forming agent, defoamer, and leveling agent, effectively improves the wetting performance and adhesion of the water-based paint to the substrate, significantly enhancing the adhesion of the environmentally friendly water-based paint to the substrate. Simultaneously, the paint film coating exhibits excellent water resistance, low volatile organic compound content, and is environmentally friendly and safe. Detailed Implementation

[0022] The following embodiments are provided to better understand the present invention and are not limited to the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0023] For experiments not specifically described in the examples, the procedures or conditions should be followed according to the conventional experimental procedures described in the literature in this field. Reagents or instruments whose manufacturers are not specified are all commercially available conventional reagent products.

[0024] Example 1

[0025] This embodiment provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0026] 1) Add 1 kg of polyethylene glycol monooleate and 0.1 kg of allyl glycol to 0.5 kg of isopropanol and mix. Then add 0.02 kg of azobisisobutyronitrile and react at 78 °C for 3 h. After the reaction is completed, remove azobisisobutyronitrile and isopropanol by vacuum rotary evaporation of the reaction solution to obtain modified polyethylene glycol monooleate.

[0027] 2) Mix 4g of nano silica, 4g of calcium carbonate powder, 2g of dispersant BYK190 and 12g of water, and disperse by ultrasonication at a power of 400w for 30min to obtain a premix. Then add 80g of polyacrylate emulsion, 10g of modified polyethylene glycol monooleate, 1g of thickener RM2020, 1.5g of film-forming agent PGDA, 1g of defoamer W-082 and 1.2g of leveling agent allyl hydroxyethyl ether to the premix and stir at 1200r / min for 20min to obtain the environmentally friendly water-based paint.

[0028] Example 2

[0029] This embodiment provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0030] 1) Add 1 kg of polyethylene glycol monooleate and 0.2 kg of allyl glycol to 0.5 kg of isopropanol and mix. Then add 0.04 kg of azobisisobutyronitrile and react at 80 °C for 4 h. After the reaction is completed, the reaction solution is removed by vacuum rotary evaporation to remove azobisisobutyronitrile and isopropanol to obtain modified polyethylene glycol monooleate.

[0031] 2) Mix 5g of nano silica, 3g of calcium carbonate powder, 3g of dispersant BYK190 and 15g of water, and disperse by ultrasonication at a power of 450w for 30min to obtain a premix. Then add 80g of polyacrylate emulsion, 8g of modified polyethylene glycol monooleate, 1g of thickener RM2020, 1g of film-forming agent PGDA, 1.5g of defoamer W-082 and 1.5g of leveling agent allyl hydroxyethyl ether to the premix and stir at 1200r / min for 30min to obtain the environmentally friendly water-based paint.

[0032] Example 3

[0033] This embodiment provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0034] 1) Add 1 kg of polyethylene glycol monooleate and 0.2 kg of allyl glycol to 0.5 kg of isopropanol and mix. Then add 0.04 kg of azobisisobutyronitrile and react at 75 °C for 6 h. After the reaction is completed, the reaction solution is removed by vacuum rotary evaporation to remove azobisisobutyronitrile and isopropanol to obtain modified polyethylene glycol monooleate.

[0035] 2) Mix 5g of nano silica, 2.5g of calcium carbonate powder, 2g of dispersant BYK190 and 15g of water, and ultrasonically disperse them at a power of 450w for 40min to obtain a premix. Then add 80g of polyacrylate emulsion, 12g of modified polyethylene glycol monooleate, 1g of thickener RM2020, 1.5g of film-forming agent PGDA, 1g of defoamer W-082 and 1.5g of leveling agent allyl hydroxyethyl ether to the premix and stir at 1200r / min for 30min to obtain the environmentally friendly water-based paint.

[0036] Example 4

[0037] This embodiment provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0038] 1) Add 1 kg of polyethylene glycol monooleate and 0.2 kg of allyl glycol to 0.5 kg of isopropanol and mix. Then add 0.04 kg of azobisisobutyronitrile and react at 75 °C for 6 h. After the reaction is completed, the reaction solution is removed by vacuum rotary evaporation to remove azobisisobutyronitrile and isopropanol to obtain modified polyethylene glycol monooleate.

[0039] 2) Mix 4.5g of nano silica, 2g of calcium carbonate powder, 2g of dispersant BYK190 and 15g of water, and ultrasonically disperse them at a power of 450w for 40min to obtain a premix. Then add 80g of polyacrylate emulsion, 8g of modified polyethylene glycol monooleate, 1g of thickener RM2020, 1.5g of film-forming agent PGDA, 1.5g of defoamer W-082 and 1g of leveling agent allyl hydroxyethyl ether to the premix and stir at 1200r / min for 30min to obtain the environmentally friendly water-based paint.

[0040] Comparative Example 1

[0041] This comparative example provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0042] 4g of nano-silica, 4g of calcium carbonate powder, 2g of dispersant BYK190 and 12g of water were mixed and ultrasonically dispersed at a power of 400W for 30min to obtain a premix. Then, 80g of polyacrylate emulsion, 10g of polyethylene glycol monooleate, 1g of thickener RM2020, 1.5g of film-forming agent PGDA, 1g of defoamer W-082 and 1.2g of leveling agent allyl hydroxyethyl ether were added to the premix and stirred at 1200r / min for 20min to obtain the environmentally friendly water-based paint.

[0043] Comparative Example 2

[0044] This comparative example provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0045] 4g of nano-silica, 4g of calcium carbonate powder, 2g of dispersant BYK190 and 12g of water were mixed and ultrasonically dispersed at a power of 400W for 30min to obtain a premix. Then, 80g of polyacrylate emulsion, 9.1g of polyethylene glycol monooleate, 0.9g of allyl ethylene glycol, 1g of thickener RM2020, 1.5g of film-forming agent PGDA, 1g of defoamer W-082 and 1.2g of leveling agent allyl hydroxyethyl ether were added to the premix. The mixture was stirred at 1200r / min for 20min to obtain the environmentally friendly water-based paint.

[0046] Comparative Example 3

[0047] This comparative example provides a method for preparing an environmentally friendly water-based paint, including the following steps:

[0048] 4g of nano-silica, 4g of calcium carbonate powder, 2g of dispersant BYK190 and 12g of water were mixed and ultrasonically dispersed at a power of 400W for 30min to obtain a premix. Then, 80g of polyacrylate emulsion, 10g of allyl ethylene glycol, 1g of thickener RM2020, 1.5g of film-forming agent PGDA, 1g of defoamer W-082 and 1.2g of leveling agent allyl hydroxyethyl ether were added to the premix and stirred at 1200r / min for 20min to obtain the environmentally friendly water-based paint.

[0049] Test case

[0050] The environmentally friendly water-based paints prepared in the above embodiments and comparative examples were subjected to performance tests. The test results are shown in Table 1. The test substrate was metal steel.

[0051] The adhesion test was conducted according to the GB / T9286-1998 standard;

[0052] The water resistance test was conducted according to the GB / T1733-1993 standard;

[0053] The salt spray test was conducted according to the GB / T 1771-1991 standard;

[0054] Volatile organic compounds (VOCs) were tested according to the GB / T23986-2009 standard.

[0055] Table 1

[0056]

[0057]

[0058] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for preparing an environmentally friendly water-based paint, characterized in that, Includes the following steps: 1) Polyethylene glycol monooleate, allyl glycol and alcohol solvent are mixed, then an initiator is added and the mixture is heated to react, thus obtaining modified polyethylene glycol monooleate; 2) Mix nano-silica, calcium carbonate powder, dispersant and water, and ultrasonically disperse to obtain a premixed liquid. Then add polyacrylate emulsion, modified polyethylene glycol monooleate, thickener, film-forming agent, defoamer and leveling agent to the premixed liquid, and stir to obtain the environmentally friendly water-based paint. The mass ratio of polyethylene glycol monooleate, allyl ethylene glycol, alcohol solvent, and initiator is 1:(0.1-0.2):(0.4-0.8):(0.01-0.05). Step 2) The mass ratio of nano-silica, calcium carbonate powder, dispersant, water, polyacrylate emulsion, modified polyethylene glycol monooleate, thickener, film-forming agent, defoamer, and leveling agent is (3-5):(3-5):(1-3):(10-20):(78-85):(8-12):(1-3):(1-3):(1-2):(1-2); The dispersant is selected from BYK190; the thickener is selected from RM2020; the film-forming agent is selected from PGDA; the defoamer is selected from W-082 and BYK024; and the leveling agent is selected from allyl hydroxyethyl ether and acetate cellulose leveling agent.

2. The method for preparing the environmentally friendly water-based paint according to claim 1, characterized in that, The heating reaction temperature is 75-80℃, and the heating reaction time is 3-6h.

3. The method for preparing the environmentally friendly water-based paint according to claim 1, characterized in that, The alcohol solvent is isopropanol; The initiator is selected from azobisisobutyronitrile.

4. The method for preparing the environmentally friendly water-based paint according to claim 1, characterized in that, After the heating reaction is complete, the reaction solution is also subjected to vacuum rotary evaporation.

5. The method for preparing the environmentally friendly water-based paint according to claim 1, characterized in that, In the ultrasonic dispersion step, the ultrasonic power is 400-500W and the ultrasonic time is 20-60min.

6. The method for preparing the environmentally friendly water-based paint according to claim 1, characterized in that, The stirring speed in the stirring and mixing step is 1200-1500 r / min, and the stirring and mixing time is 20-40 min.

7. An environmentally friendly water-based paint for aquaculture ponds, characterized in that, It is prepared by the preparation method according to any one of claims 1-6.

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