CN118421151A - Hydrophobic water-based paint and preparation method thereof - Google Patents

Abstract

The application discloses a hydrophobic water-based paint and a preparation method thereof, wherein the hydrophobic water-based paint comprises the following raw materials in parts by weight: 65-85 parts of acrylic emulsion; 10-14 parts of polytetrafluoroethylene wax; 3-5 parts of a coupling agent; 3-6 parts of boron nitride; 15-21 parts of KH570 modified zeolite powder; 40-80 parts of water; 2-3 parts of defoaming agent; 3-6 parts of a thickening agent; 1-2 parts of flatting agent; 4-10 parts of film forming auxiliary agent. The hydrophobic water-based paint provided by the application has the advantages of good water resistance, good adhesive force and good hardness.

Description

Hydrophobic water-based paint and preparation method thereof

Technical Field

The application relates to the technical field of water-based paint, in particular to a hydrophobic water-based paint and a preparation method thereof.

Background

The coating is widely applied and has increasingly prominent importance as an organic chemical high polymer material. The coating film formed therefrom has typical characteristics of a polymer compound and exhibits excellent physical and chemical properties. According to the fine classification system of modern chemical products, the coating belongs to the category of the fine chemical products undoubtedly, and the fine and specialized development trend of the coating in the chemical field is reflected.

Water-based paint has become a popular choice in the market due to its excellent environmental protection properties. The paint can be uniformly and stably dispersed in water, and harmful organic solvents such as benzene, toluene, dimethylbenzene, esters and the like which are commonly contained in the traditional paint are abandoned, so that the pollution to the environment is obviously reduced. The environmental protection advantage makes the water-based paint take an important role in the paint market and is favored by consumers.

However, with the popularity of aqueous coating applications, their hydrophobic properties have received greater attention. At present, in order to improve the hydrophobic performance of the water-based paint, a method of adding a lotus leaf hydrophobic agent is often adopted. Although this approach can improve the hydrophobic properties of the aqueous coating to some extent, the overall effect is not satisfactory.

Disclosure of Invention

In order to solve at least one of the technical problems, a hydrophobic water-based paint with better hydrophobic performance is developed, and the application provides the hydrophobic water-based paint and a preparation method thereof.

In a first aspect, the application provides a hydrophobic water-based paint, which comprises the following raw materials in parts by weight:

65-85 parts of acrylic emulsion;

10-14 parts of polytetrafluoroethylene wax;

3-5 parts of a coupling agent;

3-6 parts of boron nitride;

15-21 parts of KH570 modified zeolite powder;

40-80 parts of water;

2-3 parts of defoaming agent;

3-6 parts of a thickening agent;

1-2 parts of flatting agent;

4-10 parts of film forming auxiliary agent.

By adopting the technical scheme, the hydrophobic water-based paint with strong adhesive force and hardness and good hydrophobicity can be prepared, and a plurality of components are added in the preparation of the hydrophobic water-based paint, wherein the acrylic emulsion is taken as a main film forming substance, a coating film formed after curing has certain hardness and elasticity, and the addition of the boron nitride further improves the hardness and the wear resistance of the coating film, so that the mechanical strength of the coating film can be enhanced, and the coating film can keep good anti-damage performance when bearing external pressure or friction. The coupling agent plays a key bridge role in the coating film, and enhances the interaction force between the inorganic filler and the acrylic emulsion, thereby greatly improving the adhesive force between the coating film and the substrate. So that the coating film can be firmly attached to the surfaces of various base materials after being dried and solidified, and is not easy to peel off or crack. Polytetrafluoroethylene wax has excellent hydrophobic properties, which forms an effective waterproof barrier in the coating film, reduces the surface energy of the coating film, and makes it difficult for water molecules to adhere and permeate. KH570 modified zeolite powder further increases the hydrophobicity of the material, and helps to further improve the waterproof performance of the coating film. Other auxiliary agents in the coating, such as defoamers, thickeners, leveling agents and film forming auxiliary agents, are all used for optimizing the quality of the coating film. In conclusion, the hydrophobic water-based paint provided by the application has excellent performances in terms of coating hardness, adhesive force and waterproofness, can be widely applied to various fields of buildings, automobiles, furniture and the like, and provides durable and efficient waterproof protection for the paint.

Optionally, the weight ratio of the polytetrafluoroethylene wax to the KH570 modified zeolite powder is 1: (1.3-1.7).

By adopting the technical scheme, polytetrafluoroethylene wax and KH570 modified zeolite powder are mixed according to the weight ratio of 1: when the water-based paint is compounded and used according to the proportion of (1.3-1.7), the hydrophobic performance of the water-based paint can be obviously enhanced. In particular, according to the first aspect, the polytetrafluoroethylene wax can form a tough hydrophobic barrier due to the unique hydrophobic characteristic and low surface energy, and effectively prevent water molecules from contacting and penetrating a coating film. After the KH570 modified zeolite powder is modified by the KH570 coupling agent, the hydrophobicity of the zeolite powder can be enhanced, and the zeolite powder can also form good interface combination with other components (such as acrylic emulsion) of a coating film, so that the overall hydrophobicity of the coating film is further improved. In the second aspect, by finely adjusting the ratio of the two, a more perfect microstructure can be constructed inside the coating film, so that water molecules cannot be effectively adsorbed and permeated when encountering the coating film due to the increase of the contact angle. The optimized microstructure can simulate the lotus leaf effect in nature and realize efficient hydrophobic and self-cleaning effects especially under the participation of KH570 modified zeolite powder. In the third aspect, under the condition of keeping the overall cost of the coating controllable, the specific proportion of the compound use strategy can maximally improve the hydrophobic property of the coating, and meanwhile, other key properties of the coating such as adhesive force, hardness and durability are not influenced, so that the effective balance of economic benefit and technical performance is realized. In summary, polytetrafluoroethylene wax and KH570 modified zeolite powder are adopted according to the following 1: the water-based paint can be obviously enhanced in hydrophobicity by compounding the components (1.3-1.7), so that the paint shows excellent waterproof and moistureproof performances in practical application, and is suitable for more severe environmental conditions and use requirements.

Optionally, the total weight of the polytetrafluoroethylene wax and the KH570 modified zeolite powder accounts for 14.93-17.86% of the total weight of the water-based paint with hydrophobic property.

By adopting the technical scheme, when the total weight of the polytetrafluoroethylene wax and the KH570 modified zeolite powder accounts for 14.93-17.86% of the total weight of the water-based paint for enhancing the hydrophobic performance, unnecessary waste caused by excessive addition is avoided, the expected hydrophobic performance requirement can be ensured to be met, and the dual satisfaction of economic benefit and functional requirement is realized.

Optionally, the preparation method of the KH570 modified zeolite powder comprises the following steps:

A1, ethanol water solution with the mass concentration of 90% and zeolite powder are mixed according to the weight ratio of 1: (4-6) mixing, carrying out ultrasonic treatment, adding KH570, mixing, and stirring uniformly to obtain a mixed material;

A2, mixing the ethylene and the n-butyl alcohol according to a weight ratio of 1:1, mixing, adding the mixed materials obtained in the step A1, adding methyl silicone oil under a stirring state, stirring for 1h, and drying to obtain KH570 modified zeolite powder;

The weight ratio of the ethylene oxide, the n-butyl alcohol, the methyl silicone oil and the zeolite powder in the step A1 in the step A2 is 1:1: (0.4-0.6): 1.

By adopting the technical scheme, the KH570 modification is carried out on the zeolite powder and the methyl silicone oil is added, so that the hydrophobic property of the zeolite powder is obviously improved, the modification process is effective and controllable by reasonable solvent selection and mixing proportion, and the finally obtained modified zeolite powder can play an excellent hydrophobic enhancement role in the water-based paint.

Optionally, the coupling agent is selected from KH560.

Optionally, the film forming aid is selected from dipropylene glycol butyl ether.

Optionally, the defoamer is selected from sodium hexametaphosphate.

Optionally, the thickener is selected from carboxymethyl cellulose.

Optionally, the hydrophobic water-based paint further comprises 5-8 parts of palmitic acid.

By adopting the technical scheme, when the hydrophobic water-based paint is prepared, the surface performance of the water-based paint can be effectively improved by adding the palmitic acid, the hydrophobic effect of the paint is enhanced, and the waterproof performance and the contamination resistance of the paint are further improved. In addition, the palmitic acid is also helpful to improve the flexibility of the coating, so that the formed paint film has certain ductility and weather resistance while keeping good hardness, and the cracking and falling phenomena caused by factors such as temperature change, humidity change and the like are reduced.

In a second aspect, the present application provides a method for preparing a hydrophobic aqueous coating, the method comprising the steps of:

and mixing all the raw materials, and uniformly stirring to obtain the water-based paint with the enhanced hydrophobic property.

By adopting the technical scheme, the preparation method provided by the application has fewer steps, does not need complex procedures and multi-step reactions, is easy to implement in industrial production, greatly reduces the production cost and complexity, and improves the production efficiency. In addition, the method can ensure the effective fusion of the components and simultaneously keep the original properties of the components such as hydrophobicity, adhesive force, hardness, weather resistance and the like to the greatest extent, so that the finally prepared coating has excellent hydrophobic property and comprehensive property.

In summary, the present invention includes at least one of the following beneficial technical effects:

1. By adopting the technical scheme, the hydrophobic water-based paint with strong adhesive force and hardness and good hydrophobicity can be prepared, and a plurality of components are added in the preparation of the hydrophobic water-based paint, wherein the acrylic emulsion is taken as a main film forming substance, a film formed after solidification has certain hardness and elasticity, and the addition of boron nitride further improves the hardness and wear resistance of the film, so that the mechanical strength of the film can be enhanced, and the film can keep good anti-damage performance when bearing external pressure or friction. The coupling agent (such as KH 570) plays a key bridge role in the coating film, and enhances the interaction force between the inorganic filler and the acrylic emulsion, thereby greatly improving the adhesive force between the coating film and the substrate. So that the coating film can be firmly attached to the surfaces of various base materials after being dried and solidified, and is not easy to peel off or crack. Polytetrafluoroethylene wax has excellent hydrophobic properties, which forms an effective waterproof barrier in the coating film, reduces the surface energy of the coating film, and makes it difficult for water molecules to adhere and permeate. KH570 modified zeolite powder further increases the hydrophobicity of the material, and helps to further improve the waterproof performance of the coating film. Other auxiliary agents in the coating, such as defoamers, thickeners, leveling agents and film forming auxiliary agents, are all used for optimizing the quality of the coating film. In conclusion, the hydrophobic water-based paint provided by the application has excellent performances in terms of coating hardness, adhesive force and waterproofness, can be widely applied to various fields of buildings, automobiles, furniture and the like, and provides durable and efficient waterproof protection for the paint.

2. Polytetrafluoroethylene wax and KH570 modified zeolite powder are mixed according to the weight ratio of 1: when the water-based paint is compounded and used according to the proportion of (1.3-1.7), the hydrophobic performance of the water-based paint can be obviously enhanced. In particular, according to the first aspect, the polytetrafluoroethylene wax can form a tough hydrophobic barrier due to the unique hydrophobic characteristic and low surface energy, and effectively prevent water molecules from contacting and penetrating a coating film. After the KH570 modified zeolite powder is modified by the KH570 coupling agent, the hydrophobicity of the zeolite powder can be enhanced, and the zeolite powder can also form good interface combination with other components (such as acrylic emulsion) of a coating film, so that the overall hydrophobicity of the coating film is further improved. In the second aspect, by finely adjusting the ratio of the two, a more perfect microstructure can be constructed inside the coating film, so that water molecules cannot be effectively adsorbed and permeated when encountering the coating film due to the increase of the contact angle. The optimized microstructure can simulate the lotus leaf effect in nature and realize efficient hydrophobic and self-cleaning effects especially under the participation of KH570 modified zeolite powder. In the third aspect, under the condition of keeping the overall cost of the coating controllable, the specific proportion of the compound use strategy can maximally improve the hydrophobic property of the coating, and meanwhile, other key properties of the coating such as adhesive force, hardness and durability are not influenced, so that the effective balance of economic benefit and technical performance is realized. In summary, polytetrafluoroethylene wax and KH570 modified zeolite powder are adopted according to the following 1: the water-based paint can be obviously enhanced in hydrophobicity by compounding the components (1.3-1.7), so that the paint shows excellent waterproof and moistureproof performances in practical application, and is suitable for more severe environmental conditions and use requirements.

3. The preparation method provided by the application has fewer steps, does not need complex procedures and multi-step reactions, is easy to implement in industrial production, greatly reduces the production cost and complexity, and improves the production efficiency. In addition, the method can ensure the effective fusion of the components and simultaneously keep the original properties of the components such as hydrophobicity, adhesive force, hardness, weather resistance and the like to the greatest extent, so that the finally prepared coating has excellent hydrophobic property and comprehensive property.

Detailed Description

The present application will be described in further detail with reference to examples.

Acrylic emulsion: the purity of the product was 99% by international trade company (Shanghai).

Polytetrafluoroethylene wax: the purity of the product was 99% by international trade company (Shanghai).

Boron nitride: the purity of Shanghai Yuan leaf Biotechnology Co., ltd is 98.5%.

KH570: the content of the effective components is 99%.

Zeolite powder: CAS number 1318-02-1, 99% purity,

KH560: the content of the effective components is 99%.

Dipropylene glycol butyl ether: CAS number 35884-42-5, 99% purity.

Sodium hexametaphosphate: CAS number 10124-56-8, 99% purity.

Carboxymethyl cellulose: CAS number 9000-11-7, 99% purity.

Palmitic acid: CAS number 57-10-3, 99% purity.

Ethanol: CAS number 64-17-5, 99.9% purity.

Ethylene oxide: the purity of Shijia Ruixing petrochemical Co.Ltd is 99.9%.

N-butanol: CAS number 71-36-3, 99.9% purity.

Methyl silicone oil: CAS number 9006-65-9, 99% purity.

Siloxane leveling agent: the purity of the Dongguan Sinuoba new material science and technology Co., ltd is 95%.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Preparation examples 1 to 3

Preparation example 1

The preparation example provides KH570 modified zeolite powder, and the preparation method comprises the following steps:

a1, ethanol water solution with the mass concentration of 90% and zeolite powder are mixed according to the weight ratio of 1:4, mixing, carrying out ultrasonic treatment, adding KH570, mixing, and stirring uniformly to obtain a mixed material;

A2, mixing the ethylene and the n-butyl alcohol according to a weight ratio of 1:1, mixing, adding the mixed materials obtained in the step A1, adding methyl silicone oil under a stirring state, stirring for 1h, and drying to obtain KH570 modified zeolite powder;

the weight ratio of the ethylene, the n-butyl alcohol, the methyl silicone oil and the zeolite powder in the step A1 is 1:1:0.4:1.

Preparation example 2

The preparation example is different from the preparation example 1 in that the preparation method of KH570 modified zeolite powder comprises the following steps:

a1, ethanol water solution with the mass concentration of 90% and zeolite powder are mixed according to the weight ratio of 1:5, mixing, carrying out ultrasonic treatment, adding KH570, mixing, and stirring uniformly to obtain a mixed material;

A2, mixing the ethylene and the n-butyl alcohol according to a weight ratio of 1:1, mixing, adding the mixed materials obtained in the step A1, adding methyl silicone oil under a stirring state, stirring for 1h, and drying to obtain KH570 modified zeolite powder;

the weight ratio of the ethylene, the n-butyl alcohol, the methyl silicone oil and the zeolite powder in the step A1 is 1:1:0.5:1.

Preparation example 3

The preparation example is different from the preparation example 1 in that the preparation method of KH570 modified zeolite powder comprises the following steps:

a1, ethanol water solution with the mass concentration of 90% and zeolite powder are mixed according to the weight ratio of 1:6, mixing, carrying out ultrasonic treatment, adding KH570, mixing, and stirring uniformly to obtain a mixed material;

A2, mixing the ethylene and the n-butyl alcohol according to a weight ratio of 1:1, mixing, adding the mixed materials obtained in the step A1, adding methyl silicone oil under a stirring state, stirring for 1h, and drying to obtain KH570 modified zeolite powder;

The weight ratio of the ethylene, the n-butyl alcohol, the methyl silicone oil and the zeolite powder in the step A1 is 1:1:0.6:1.

Example 1

The embodiment provides a hydrophobic water-based paint, which comprises the following raw materials in parts by weight:

65 parts of acrylic emulsion; 12 parts of polytetrafluoroethylene wax; 3 parts of a coupling agent; 3 parts of boron nitride; 18 parts of KH570 modified zeolite powder; 40 parts of water; 2 parts of defoaming agent; 3 parts of a thickening agent; 1 part of leveling agent; 4 parts of film forming auxiliary agent.

The preparation method comprises the following steps: all the raw materials are mixed and stirred uniformly to prepare the water-based paint with enhanced hydrophobic property.

KH 570-modified zeolite powder in this example was prepared in preparation example 1.

The defoamer in this example is selected from sodium hexametaphosphate.

The thickener in this example is selected from carboxymethyl cellulose.

The leveling agent in this example is selected from silicone leveling agents.

The film forming aid in this example is selected from dipropylene glycol butyl ether.

The coupling agent in this example is selected from KH560.

Examples 2 to 4

Example 2

This example is different from example 1 in that, in preparing a hydrophobic water paint, the total weight of KH570 modified zeolite powder and polytetrafluoroethylene wax is 30 parts, wherein the weight ratio of polytetrafluoroethylene wax to KH570 modified zeolite powder is 1:1.3.

Example 3

The difference between this example and example 1 is that the total weight of KH570 modified zeolite powder and polytetrafluoroethylene wax is 30 parts, and the weight ratio of polytetrafluoroethylene wax to KH570 modified zeolite powder is 1:1.4.

Example 4

The difference between this example and example 1 is that in the preparation of the hydrophobic water-based paint, the total weight of KH570 modified zeolite powder and polytetrafluoroethylene wax is 30 parts, and the weight ratio of polytetrafluoroethylene wax to KH570 modified zeolite powder is 1.7:1.

Comparative examples 1 to 3

Comparative example 1

This comparative example is different from example 1 in that KH570 modified zeolite powder was not added in preparing the hydrophobic water paint.

Comparative example 2

This comparative example differs from example 1 in that no polytetrafluoroethylene wax was added in the preparation of the hydrophobic aqueous coating.

Comparative example 3

This comparative example is different from example 1 in that polytetrafluoroethylene wax and KH570 modified zeolite powder were not added in the preparation of the hydrophobic aqueous coating material.

And (3) experimental detection:

and (3) adhesive force detection: the test was carried out according to GB/T52102006 adhesion test for paint and varnish pull-off method. The adhesion of the coating was tested using a digital display pull-apart adhesion tester.

And (3) hardness detection: the coating hardness is tested according to GB/T67392006 'determination of coating hardness by pencil hardness method of colored paint and varnish', the coating hardness is tested on a pencil hardness tester, and the coating hardness grade evaluation method comprises the following steps: five times of testing are carried out on the same type pencil until two or more than two marks appear on the surface of the coating film, and the latter position of the pencil hardness model is the pencil hardness of the coating film.

Hydrophobicity detection: contact angle detection: the hydrophobic water paint is coated on a glass plate to form a film naturally, different areas of the film are tested for three times by referring to a national standard JJ2000B2 contact angle tester, the average value is taken, the hydrophobicity of the coating can be estimated by the water contact angle, the size of the hydrophobicity directly influences the corrosion resistance and protection effect of the coating, for example, the stronger the hydrophobicity is, corrosive solution or gas is more difficult to penetrate into the coating, and then the metal substrate is protected.

The experimental test results of examples 1 to 4 and comparative examples 1 to 3 are shown in Table 1.

TABLE 1 Experimental test results Table for examples 1-4 and comparative examples 1-3

Examples	Adhesive force (MPa)	Hardness (H)	Contact angle (°)
				Example 1	7.2	HB	155.7
Example 2	6.4	HB	148.2
				Example 3	6.7	HB	152.8
Example 4	6.9	HB	153.1
				Comparative example 1	4.5	B	122.6
Comparative example 2	4.9	B	118.5
				Comparative example 3	3.8	2B	112.7

Analysis of results: examples 2 to 4 are different from example 1 in that, in preparing the hydrophobic aqueous coating material, the total weight of KH570 modified zeolite powder and polytetrafluoroethylene wax is 30 parts, wherein the weight ratio of polytetrafluoroethylene wax to KH570 modified zeolite powder is different, and when the experimental detection result of table 1 is combined, it is known that the weight ratio of KH570 modified zeolite powder to polytetrafluoroethylene wax is 1.5:1, the prepared hydrophobic water-based paint has better hardness, adhesion and waterproof performance.

Comparative example 1 is different from example 1 in that KH570 modified zeolite powder was not added in the preparation of the hydrophobic water paint. From the experimental test results shown in Table 1, it was found that the addition of KH570 modified zeolite powder in the preparation of the hydrophobic water-based paint resulted in poor water resistance and adhesion of the prepared hydrophobic water-based paint. Comparative example 2 differs from example 1 in that polytetrafluoroethylene wax was not added in the preparation of the hydrophobic aqueous coating. From the experimental test results shown in Table 1, it was found that the addition of polytetrafluoroethylene wax in the preparation of the hydrophobic aqueous coating material resulted in poor water repellency and adhesion of the prepared hydrophobic aqueous coating material. Comparative example 3 is different from example 1 in that polytetrafluoroethylene wax and KH570 modified zeolite powder were not added in preparing a hydrophobic water paint. As can be seen from the experimental detection results of table 2 and comparative examples 1-3, when the polytetrafluoroethylene wax and KH570 modified zeolite powder are compounded for use in preparing the hydrophobic water-based paint, the adhesion and waterproof performance of the prepared hydrophobic water-based paint can be improved, and the reason is that the H570 modified zeolite powder may provide active points for enhancing the mechanical binding force between the coating and the substrate for the hydrophobic water-based paint, so that the adhesion of the paint is improved; in addition, the polytetrafluoroethylene wax can remarkably improve the waterproof performance of the coating due to low surface energy and excellent hydrophobicity, and can be helpful for forming a more compact coating film structure; when the two components are simultaneously present in the coating system, the microstructure of the coating can be enhanced, so that the hardness, adhesive force, water resistance and other key performance indexes of the coating are improved. Therefore, the comparison experiment result shows that the compound use of polytetrafluoroethylene wax and KH570 modified zeolite powder is important for obtaining high-performance coating when preparing the hydrophobic water-based coating.

Example 5

This example differs from example 1 in that in the preparation of the hydrophobic aqueous coating, the parts by weight of the components are changed, the differences being seen in Table 2.

Tables 2-Table 5-6 and Table 1 showing the difference

The results of the experimental tests of examples 5-6 are shown in Table 3.

Table 3-Table of experimental results of examples 5-6

Examples	Adhesive force (MPa)	Hardness (H)	Contact angle (°)
				Example 1	7.2	HB	155.7
Example 5	7.8	HB	158.1
				Example 6	7.4	HB	156.9

Analysis of results: examples 5 to 6 are different from example 1 in that the parts by weight of the partial components are different in the preparation of the hydrophobic aqueous coating material, and it is understood from the experimental test results of table 3 that the hydrophobic aqueous coating material prepared by the examples has better overall properties.

Examples 7 to 11

Example 7

Examples 7 to 11 differ from example 5 in that, in the preparation of the hydrophobic aqueous coating, the weight ratio of the modified zeolite powder to the polytetrafluoroethylene wax was 1.5 by KH 570: 1, and preferably, the weight ratio of KH570 modified zeolite powder to polytetrafluoroethylene wax in the hydrophobic water paint is changed.

In example 5, the total weight of polytetrafluoroethylene wax and KH 570-modified zeolite powder was 30 parts, and the total weight of the hydrophobic aqueous coating was 201 parts.

Thus, it is clear that in example 5, the ratio of polytetrafluoroethylene wax (referred to as variable 1) to KH570 modified zeolite powder (referred to as variable 2) in the hydrophobic aqueous coating material (referred to as substrate) was 14.93%.

See Table 4 for a part of the differences between examples 7-11 and example 5.

The ratio = (variable 1+ variable 2)/total matrix weight is 100%.

Tables 4-Table 7-11 and Table 5 showing the difference

The results of the experimental tests of examples 7-11 are shown in Table 5.

Table 5-Table of experimental results of examples 7-11

Examples	Adhesive force (MPa)	Hardness (H)	Contact angle (°)
				Example 5	7.8	HB	158.1
Example 7	7.0	HB	152.7
				Example 8	7.3	HB	155.8
Example 9	7.9	HB	160.2
				Example 10	8.2	HB	163.5
Example 11	8.1	HB	161.7

Analysis of results: examples 7 to 11 differ from example 5 in that, in the preparation of the hydrophobic aqueous coating, the weight ratio of the modified zeolite powder to the polytetrafluoroethylene wax was 1.5 by KH 570: 1 on the premise of changing the ratio of the total weight of the KH570 modified zeolite powder and the polytetrafluoroethylene wax in the hydrophobic water-based paint, and combining the experimental detection results of table 3, it is known that when the ratio of the total weight of the KH570 modified zeolite powder and the polytetrafluoroethylene wax in the hydrophobic water-based paint is 14.93-17.86%, the comprehensive performance of the prepared hydrophobic water-based paint is better, and when the ratio of the total weight of the KH570 modified zeolite powder and the polytetrafluoroethylene wax in the hydrophobic water-based paint is 16.86%, the comprehensive performance of the prepared hydrophobic water-based paint is best.

Examples 12 to 13

Example 12

The difference between this example and example 10 is that the KH 570-modified zeolite powder used in the preparation of the hydrophobic water-based paint has different preparation parameters, and the KH 570-modified zeolite powder in this example is prepared in preparation example 2.

Example 13

The difference between this example and example 10 is that the KH 570-modified zeolite powder used in the preparation of the hydrophobic water-based paint has different preparation parameters, and the KH 570-modified zeolite powder in this example is prepared in preparation example 3.

The results of the experimental tests of examples 12-13 are shown in Table 6.

TABLE 6 Experimental test results Table of examples 12-13

Analysis of results: examples 12 to 13 are different from example 10 in that KH570 modified zeolite powder was used in preparing the hydrophobic aqueous coating material, and it is understood from the experimental test results of Table 6 that the hydrophobic aqueous coating material prepared in example 12 has better overall properties.

Examples 14 to 16

Example 14

This example differs from example 12 in that 5 parts of palmitic acid is also included in the preparation of the hydrophobic aqueous coating.

The preparation method of the hydrophobic water-based paint in the embodiment is as follows:

The preparation method comprises the following steps: and mixing all the raw materials, and uniformly stirring to obtain the water-based paint with the enhanced hydrophobic property.

Example 15

This example differs from example 14 in that it includes 7 parts of palmitic acid.

Example 16

This example differs from example 14 in that 10 parts of palmitic acid are included.

The results of the experimental tests of examples 14-16 are shown in Table 7.

Table 7-Table of experimental results of examples 14-16

Examples	Adhesive force (MPa)	Hardness (H)	Contact angle (°)
				Example 12	8.5	HB	165.3
Example 14	8.7	HB	167.9
				Example 15	8.9	HB	169.2
Example 16	8.8	HB	168.1

Analysis of results: examples 14-16 differ from example 12 in that, in preparing the hydrophobic aqueous coating, the raw materials also include palmitic acid, and as can be seen from the experimental examination results of table 2, the addition of palmitic acid further improves the water resistance of the prepared hydrophobic aqueous coating, possibly because,

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (10)

1. The hydrophobic water-based paint is characterized by comprising the following raw materials in parts by weight:

65-85 parts of acrylic emulsion;

10-14 parts of polytetrafluoroethylene wax;

3-5 parts of a coupling agent;

3-6 parts of boron nitride;

15-21 parts of KH570 modified zeolite powder;

40-80 parts of water;

2-3 parts of defoaming agent;

3-6 parts of a thickening agent;

1-2 parts of flatting agent;

4-10 parts of film forming auxiliary agent.

2. The hydrophobic water paint of claim 1, wherein the weight ratio of polytetrafluoroethylene wax to KH570 modified zeolite powder is 1: (1.3-1.7).

3. The hydrophobic aqueous coating according to claim 1, wherein the total weight of polytetrafluoroethylene wax and KH570 modified zeolite powder is 14.93-17.86% of the total weight of the hydrophobic aqueous coating.

4. The hydrophobic water paint of claim 1, wherein the preparation method of the KH570 modified zeolite powder comprises the following steps:

A1, ethanol water solution with the mass concentration of 90% and zeolite powder are mixed according to the weight ratio of 1: (4-6) mixing, carrying out ultrasonic treatment, adding KH570, mixing, and stirring uniformly to obtain a mixed material;

A2, mixing the ethylene and the n-butyl alcohol according to a weight ratio of 1:1, mixing, adding the mixed materials obtained in the step A1, adding methyl silicone oil under a stirring state, stirring for 1h, and drying to obtain KH570 modified zeolite powder;

The weight ratio of the ethylene oxide, the n-butyl alcohol, the methyl silicone oil and the zeolite powder in the step A1 in the step A2 is 1:1: (0.4-0.6): 1.

5. The hydrophobic waterborne coating of claim 1, wherein the coupling agent is selected from KH560.

6. The hydrophobic waterborne coating of claim 1, wherein the film-forming aid is selected from dipropylene glycol butyl ether.

7. The hydrophobic waterborne coating of claim 1, wherein the defoamer is selected from the group consisting of sodium hexametaphosphate.

8. The hydrophobic waterborne coating of claim 1, wherein the thickener is selected from the group consisting of carboxymethyl cellulose.

9. The hydrophobic waterborne coating of claim 1, wherein the hydrophobic waterborne coating further comprises 5-8 parts palmitic acid.

10. A method of preparing a hydrophobic aqueous coating as claimed in any one of claims 1 to 9, comprising the steps of:

and mixing all the raw materials, and uniformly stirring to obtain the water-based paint with the enhanced hydrophobic property.