CN117683420A

CN117683420A - Anti-fouling wear-resistant water-based paint and preparation method thereof

Info

Publication number: CN117683420A
Application number: CN202311680159.8A
Authority: CN
Inventors: 梁飘坚; 陈娟; 曾庆乐; 岑婉莹
Original assignee: Shanghai Batf Industrial Co ltd; Guangdong Badfu New Material Co ltd
Current assignee: Shanghai Batf Industrial Co ltd; Guangdong Badfu New Material Co ltd
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-03-12

Abstract

The invention provides an anti-fouling and wear-resistant water-based paint which consists of a component A, a component B, a component C and a component D; the component A comprises the following components in parts by weight: 30-40 parts of pure acrylic emulsion, wherein the contact angle of the pure acrylic emulsion is 10-20 degrees, and the pure acrylic emulsion contains an organosilicon compound; the component B comprises the following components: 29-52 parts of filler, wherein the filler comprises 5-15 parts of white corundum, and the particle size of the white corundum is 800-1250 meshes; the component C comprises the following components: 7.5 to 12.5 portions of auxiliary agent; the D component comprises: 10-16 parts of aqueous solvent. The paint film prepared from the anti-fouling and wear-resistant water-based paint has excellent wear resistance and contamination resistance.

Description

Anti-fouling wear-resistant water-based paint and preparation method thereof

Technical Field

The invention relates to the field of paint, in particular to an anti-fouling and wear-resistant water-based paint and a preparation method thereof.

Background

Along with the development of science and technology and the progress of civilization, people have higher requirements on living environment, and corresponding building industry is continuously innovated and advanced, wherein, the building outer wall is one of core parts of the whole building, and is always exposed outdoors for a long time and frequently subjected to sunlight irradiation and rain water drifting, if the inner wall emulsion paint is directly adopted to protect the outer wall, the problems of poor weather resistance and easy yellowing of a paint film can occur, so that the problems are solved by adopting the outer wall paint with relatively high emulsion content in the industry.

However, most of the existing exterior wall coatings are easy to have back-adhesion, and the prepared paint film is low in contamination resistance and poor in wear resistance, so that the paint film is easy to damage and cannot provide good protection for the wall surface. Especially, people often walk in the corridor, such as the wall surface of the school corridor is often touched by hands or scraped by various articles, and various life stains such as fingerprints, shoe marks, basketball marks, football marks and the like are easily left, so that the surface of a paint film is stained, and the protection and the decoration of the wall surface are not facilitated.

In summary, aiming at the defects of the existing products, it is necessary to develop an anti-fouling and wear-resistant water-based paint, so that a paint film prepared from the water-based paint has excellent wear resistance and contamination resistance.

Disclosure of Invention

The invention aims to provide an anti-fouling and wear-resistant water-based paint and a manufacturing method thereof.

According to a first aspect of the invention, there is provided an anti-fouling and wear-resistant water-based paint, which consists of a component A, a component B, a component C and a component D; the component A comprises the following components in parts by weight: 30-40 parts of pure acrylic emulsion, wherein the contact angle of the pure acrylic emulsion is 10-20 degrees, and the pure acrylic emulsion contains an organosilicon compound; the component B comprises: 29-52 parts of filler, wherein the filler comprises 5-15 parts of white corundum, and the particle size of the white corundum is 800-1250; the component C comprises the following components: 7.5 to 12.5 portions of auxiliary agent; the component D comprises the following components: 10-16 parts of aqueous solvent.

The paint film prepared from the anti-fouling and wear-resistant water-based paint provided by the scheme has higher hardness and excellent wear resistance and contamination resistance. The pure acrylic emulsion containing the organosilicon compound adopted by the invention has a contact angle of 10-20 degrees, which indicates that the pure acrylic emulsion adopted by the scheme belongs to hydrophilic emulsion, and a paint film applying the emulsion product is easy to have the internal hydrophobic and surface hydrophilic properties. In the drying and curing process of the coating, hydrophilic groups in the pure acrylic emulsion can migrate to the surface of the paint film, so that the hydrophilicity of the paint film is greatly improved. In addition, the white corundum has higher Mohs hardness, and after the pure acrylic emulsion and the white corundum meeting the particle size requirement and containing metal ions are subjected to chelation, the hardness, wear resistance and compactness of the paint film can be improved, so that the speed of water in the external environment penetrating through the paint film is slowed down, and the water resistance of the paint film is enhanced. Therefore, the paint film surface prepared by the anti-fouling and wear-resistant water-based paint provided by the scheme has hydrophilicity and water resistance, so that water drops in the external environment can form a water film on the paint film surface, pollutants on the paint film surface can be taken away by the water film under the action of gravity, and the anti-fouling and wear-resistant performance of the paint film is improved. In addition, the pure acrylic emulsion is matched with the white corundum meeting the particle size requirement, so that the prepared anti-fouling and wear-resistant water-based paint has good wettability and fluidity, the white corundum has good dispersion characteristic in the paint, and the storage stability of the anti-fouling and wear-resistant water-based paint can be further improved. The paint film obtained by the method has excellent uniformity and flatness, so that the structural stability and the handfeel of the paint film are improved, and the paint film has the characteristics of good wear resistance, good structural stability, scratch resistance and the like of the exterior wall paint, and also has the advantages of stain resistance and smooth handfeel of the interior wall paint. In summary, after the white corundum is matched with the hydrophilic emulsion, the paint has good fluidity, wettability and storage stability, and a paint film prepared from the paint has excellent hydrophilic water resistance, stain resistance, wear resistance, structural stability and smooth hand feeling, and simultaneously has the advantages of outer wall paint and inner wall paint.

Preferably, the solid content of the pure acrylic emulsion is 47-49%. When the pure acrylic emulsion with the solid content of 47-49% and the white corundum are selected to prepare the anti-fouling and wear-resistant water-based paint, the rheological property and the drying speed of the paint can be improved, so that the workability of the paint is improved, and a paint film with stable structure, uniform surface and smooth hand feeling is formed by the paint.

Alternatively, the pure acrylic emulsion is an emulsion product manufactured by Baderfu under the trade designation RS-8687. The emulsion product produced by Baderfu and with the brand of RS-8687 is a hydrophilic polymer synthesized by adopting the Sup-hydro patent technology, is prepared by adopting the technology of organosilicon modification and seed emulsion polymerization technology, has small particle size and compact film formation, and is easy to chelate with metal ions of other materials in the coating. In addition, the emulsion does not contain APEO and heavy metals, belongs to an environment-friendly product, and is suitable for being used as an external wall self-cleaning coating.

Preferably, the particle size of the white corundum is 1000 mesh.

Preferably, the mohs hardness of white corundum is 9.

Preferably, the alumina content in the white corundum is not less than 99%.

Alternatively, the white corundum is 1000 mesh white corundum micropowder manufactured by Hongyu micropowder Co.

Preferably, the filler further comprises 6 to 12 parts of glass frit. The anti-fouling and wear-resistant water-based paint is prepared by matching glass powder, white corundum and the hydrophilic pure acrylic emulsion, so that the compactness of a paint film can be further improved, and the wear resistance and the water resistance of the paint film are improved. In addition, the glass powder has the characteristics of low specific surface area and low oil absorption, so that a paint film is not easy to extinction, the smoothness of the surface of the paint film is further improved, the water drops on the surface of the paint film are helped to smoothly remove pollutants on the surface of the paint film, and the contamination resistance of the paint film is further improved.

Preferably, the glass frit has a mohs hardness of 7.3.

Preferably, the silica content in the glass frit is not less than 80%. The silicon dioxide in the glass powder has good weather resistance, and can improve the structural stability and yellowing resistance of a paint film.

Alternatively, the glass frit is glass frit model BH-908 manufactured by Chuangxiao New Material Co., ltd.

Preferably, the filler also comprises 18-25 parts of titanium dioxide, and the titanium dioxide is rutile titanium dioxide. The rutile type titanium dioxide is easy to infiltrate and disperse by the hydrophilic pure acrylic emulsion, so that the storage stability of the paint is improved, the whiteness, glossiness, hiding power and weather resistance of a paint film can be further improved, and the paint film has good structural stability and is not easy to pulverize and crack. In addition, titanium dioxide has three crystal structures, namely a titanium plate type, an anatase type and a rutile type. The titanium white plate has an unstable crystal structure, so that the titanium white plate cannot exist stably for a long time in nature, and has small quantity and no industrial value and is not used. Compared with anatase titanium dioxide, the paint prepared from rutile titanium dioxide has better weather resistance and wear resistance. The rutile titanium dioxide can bring higher hiding power and weather resistance to a paint film, and can ensure that the paint film has better structural stability and anti-discoloration performance, so that the paint film can still maintain good structural stability after being exposed to the sun for a long time, and is difficult to pulverize and crack.

Preferably, the rutile titanium dioxide is titanium dioxide with the brand of R-706 produced by the American Komu company, and the titanium dioxide is chloride process rutile titanium dioxide.

Preferably, the auxiliary comprises a polyether siloxane copolymer-type auxiliary. The polyether siloxane copolymer auxiliary agent has higher molecular weight and molecular chain freedom degree, so that the chiral agent can form a layer of film on the surface of a paint film to realize intermolecular sliding. When the object and the paint film are rubbed, molecules in the polyether siloxane copolymer auxiliary agent can slide relatively freely, so that better smooth touch feeling and smooth hand feeling are provided, direct contact and friction between the surface of the paint film and the object are reduced, and the wear resistance of the paint film is improved.

Preferably, the polyether siloxane copolymer aid is a wetting and leveling agent model YCK-1310 manufactured by Shanghai chemical Co., ltd. The wetting and leveling agent has high efficiency and wide compatibility, can promote fluidity when applied to water-based paint, can wet a substrate, prevent shrinkage cavity, and does not influence recoating property and interlayer adhesive force.

Preferably, the adjuvants include silicone-based adjuvants. When the polysiloxane auxiliary agent is matched with the hydrophilic pure acrylic emulsion to prepare the anti-fouling and wear-resistant water-based paint, the crosslinking density of a paint film can be improved, the paint film is more compact, the surface of the paint film has good smooth hand feeling and scratch resistance, the influence on the recoating property of the paint film is extremely small, a layer of uniform and continuous film can be formed on the surface of the paint film, the film can fill micro pits and roughness of the surface of an object, the smoothness of the surface of the paint film is improved, the direct contact between an external object and the surface of the paint film is reduced, and the surface of the paint film becomes smoother.

Preferably, the silicone adjuvant is a scratch resistant agent of model YCK-5040 manufactured by Kagaku chemical (Shanghai) Co. The scratch resistant agent has good compatibility, and can improve the wettability and adsorptivity of the water-based paint.

Preferably, the adjunct comprises a stain resistant adjunct having a fluorine-containing active group. The fluorine-containing active group stain-resistant auxiliary agent can improve the oleophobic and hydrophobic properties of the paint film, so that the easy cleaning property of the paint film is improved, and the oil stain resistance and dust resistance of the paint film are improved on the premise of not affecting the recoating property and the water resistance of the paint film.

Preferably, the stain resistant aid has a solids content of 30 to 35%. The fluorine-containing stain-resistant auxiliary agent with the solid content can improve the wettability, leveling property, stain resistance, dust resistance and adhesion resistance of a paint film.

Alternatively, the stain resistant aid is a fluoro surfactant model FS-81 manufactured by DuPont, U.S. and is a fluoropolymer having a solids content of 33%.

Preferably, the adjuvant comprises a multifunctional amine adjuvant. The multifunctional amine auxiliary agent has excellent pH stability in a formula, can accurately adjust the pH value of a system, has a certain dispersing and wetting effect, and prevents particles in the coating from reagglomerating, so that the particles are dispersed and suspended in the coating for a long time.

Alternatively, the multifunctional amine adjuvant is a pH adjustor of the brand AMP-95 produced by Dow chemical.

Preferably, the adjuvant further comprises a sodium salt of a polycarboxylic acid. The polycarboxylic acid sodium salt belongs to a hydrophobic modified sodium salt dispersing agent and has the characteristics of high gloss, good water resistance, good initial adhesion, rain mark resistance, good color development and low water permeability.

Alternatively, the sodium salt of a polycarboxylic acid is sodium salt dispersant available from the Dow company under the trademark 731A.

Preferably, the auxiliary agent further comprises fatty alcohol polyoxyethylene ether. The fatty alcohol polyoxyethylene ether is used as a wetting agent, has the characteristics of excellent wetting capability, no APEO, low foamability, low aquatic toxicity and the like, and has high compatibility and stability with the formula system.

Alternatively, the fatty alcohol-polyoxyethylene ether is a wetting agent manufactured by Dow chemical company under the trademark EH-9.

Preferably, the adjuvants also include alcohol ester film forming adjuvants. The film forming additive has high film forming efficiency, does not belong to the VOC range and has good compatibility with the formula.

Alternatively, the alcohol ester coalescents are those available under the trademark Texanol from Issman, USA.

Preferably, the auxiliary agent comprises a metal soap-based defoamer. The defoamer has excellent and durable defoaming capability, excellent foam inhibition performance and difficult oil shrinkage.

Alternatively, the metal soap defoamer is a defoamer available under the trademark NOPCO NXZ, manufactured by the company of san nopraceae.

Preferably, the auxiliary agent further comprises a propylene glycol antifreeze. The antifreezing agent has high antifreezing efficiency, low smell, high cost performance and relatively small biological toxicity.

Optionally, the propylene glycol antifreeze is produced by Chenfeng chemical Co., ltd.

Preferably, the auxiliary agent further comprises a polyurethane thickening leveling agent. The thickening leveling agent does not contain APEO and formaldehyde, has good compatibility with a formula, and has high ICI viscosity and good leveling property.

Optionally, the polyurethane thickening leveling agent is a thickening leveling agent with the brand of RM-2020NPR produced by the Dow chemical company.

Preferably, the auxiliary agent further comprises a preservative which is a mixture of MIT and BIT. The preservative comprises MIT and BIT, has synergistic effect, has broad-spectrum killing effect on bacteria and fungi, and has good acid and alkali resistance, high-temperature performance, good durability and lower toxicity.

Alternatively, the preservative is a ceramic manufactured by the Dow company under the trademark Rocima 631.

Preferably, the auxiliary agent further comprises a mildew-proof and algae-proof agent, and the mildew-proof and algae-proof agent is formed by compounding OIT and BCM.

Alternatively, the mildew-proof algicide is a mildew-proof algicide manufactured by Langsheng company under the trademark A21D. The mildew-proof algae-proof agent can effectively inhibit the growth of mildew and algae, and can protect paint film for a long time.

According to another aspect of the present invention, there is provided a method for preparing the above-mentioned anti-fouling and abrasion-resistant aqueous paint, comprising the steps of: step one, adding a part of auxiliary agents in the component C into the component D to obtain a premix; step two, mixing the premix with the component B, and grinding the slurry obtained after mixing until the particle fineness of the slurry is less than 50 mu m to obtain grinding dispersion slurry; step three, uniformly mixing the grinding dispersion slurry with the component A to form semi-finished slurry; and step four, adding the rest auxiliary agent in the component C into the semi-finished product slurry, and fully mixing to obtain the finished product.

Preferably, the C component added in the first step comprises sodium polycarboxylate, fatty alcohol polyoxyethylene ether, metal soap defoamer, alcohol ester film forming aid, propylene glycol antifreezing agent and multifunctional amine aid.

Preferably, the polyether siloxane copolymer aid, the polysiloxane aid and the stain-resistant aid are added in the fourth step.

Preferably, the rotation speed of the mixing and stirring in the first step is 200-300 RPM, and the stirring time is 3-5 minutes.

Preferably, the grinding speed in the second step is 1500-2000 RPM, and the beating grinding time is 30-40 minutes.

Preferably, the rotation speed of the mixing and stirring in the third step is 800-1200 RPM, and the stirring time is 5-10 minutes.

Preferably, the rotation speed of the mixing and stirring in the step four is 800-1200 RPM, and the stirring time is 15-20 minutes.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

Example 1

The embodiment provides an anti-fouling wear-resistant water-based paint which comprises the following components:

TABLE 1 raw material composition of the antifouling and abrasion-resistant aqueous paint of example 1

Wherein, emulsion product with the brand of RS-8687 produced by Baderfu is pure acrylic emulsion with the contact angle within the range of 10-15 degrees, which is prepared by the technology of organosilicon modification and seed emulsion polymerization technology. The titanium dioxide with the mark of R-706 produced by the America Corp is chloride process rutile type titanium dioxide.

The white corundum is 1000 mesh white corundum micropowder produced by good luck micropowder company. The mohs hardness of the white corundum micro powder is 9, and the white corundum micro powder at least comprises 99% of aluminum oxide. The glass powder is produced by glass powder Chuan chemical engineering new material Co., ltd, and has the model BH-908, the Mohs hardness of the wear-resistant glass powder is 7.3, and the wear-resistant glass powder at least comprises 80% of silicon dioxide.

The polyether siloxane copolymer auxiliary agent is wetting and leveling agent with the model number of YCK-1310 manufactured by Shanghai chemical Co. The polysiloxane auxiliary agent is scratch resistant agent with the model number of YCK-5040 manufactured by Yike chemical (Shanghai) limited company.

The stain-resistant auxiliary agent is a fluorine surfactant with the model of FS-81 produced by DuPont company of America, and the stain-resistant auxiliary agent is a fluorine-containing polymer with the solid content of 33%. The multifunctional amine auxiliary agent is a pH regulator with the trade mark of AMP-95 produced by the Dow chemical production. The sodium salt of the polycarboxylic acid is sodium salt dispersing agent with the brand number of 731A, which is produced by the Dow company. The fatty alcohol polyoxyethylene ether is a wetting agent with the trademark EH-9 produced by the Dow chemical company. The alcohol ester film forming aid is a film forming aid manufactured by Issmann company in the United states and has the brand name Texanol. The propylene glycol antifreezing agent is produced by Chenfeng chemical Co Ltd in Guangzhou city. The polyurethane thickening leveling agent is a thickening leveling agent with the brand of RM-2020NPR produced by the Dow chemical company. The preservative manufactured by the above-mentioned Dow company under the trademark Rocima 631 is a mixture of MIT and BIT. The mildew-proof algicide with the mark A21D produced by Langsheng company is formed by compounding OIT and BCM. The metal soap defoamer is a defoamer with the brand of NOPCO NXZ produced by Santopaceae.

The preparation method of the anti-fouling wear-resistant water-based paint comprises the following steps:

adding polycarboxylic acid sodium salt, fatty alcohol polyoxyethylene ether, metal soap defoamer, alcohol ester film forming auxiliary agent, propylene glycol antifreezing agent and multifunctional amine auxiliary agent in the component D, fully mixing to facilitate pigment dispersion, controlling the rotation speed of mixing and stirring at 250RPM, and stirring for 5 minutes to obtain a premix;

mixing the premix with the component B, grinding the slurry obtained after mixing, controlling the rotating speed at 1800RPM, pulping and grinding for 25 minutes until the particle fineness in the slurry is less than 45 mu m, dispersing pigment particles into primary particles under the action of high-shear rate of high-speed stirring, and obtaining a dispersion stable state under the action of a dispersion auxiliary agent system to obtain grinding dispersion slurry;

step three, uniformly mixing the grinding dispersion slurry and the component A, controlling the mixing speed at 1000RPM, and stirring for 8 minutes to form semi-finished slurry;

adding the rest auxiliary agent in the component C into the semi-finished product slurry, fully mixing, controlling the rotation speed of mixing and stirring at 1000RPM, and stirring for 12 minutes to obtain a finished product; wherein, polyether siloxane copolymer auxiliary agent, polysiloxane auxiliary agent and stain-resistant auxiliary agent are added in the fourth step.

In other embodiments, the stirring speed and stirring time may be adjusted according to the actual situation, provided that normal preparation of the coating is not affected.

Example 2

The preparation method provided by the embodiment 1 is referred to in this embodiment, and the difference between this embodiment and the embodiment 1 is that: the pure acrylic emulsion of example 1 was replaced with an emulsion product of equal quality, manufactured by the Baderfu company under the trade name RS-8689. The contact angle of the RS-8689 emulsion product is 15-20 degrees. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Example 3

The preparation method provided by the embodiment 1 is referred to in this embodiment, and the difference between this embodiment and the embodiment 1 is that: the glass powder in example 1 was replaced with equal mass of rutile titanium dioxide. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Example 4

The preparation method provided by the embodiment 1 is referred to in this embodiment, and the difference between this embodiment and the embodiment 1 is that: equal quality 800 mesh white corundum was used instead of 1000 mesh white corundum in example 1. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Example 5

The preparation method provided by the embodiment 1 is referred to in this embodiment, and the difference between this embodiment and the embodiment 1 is that: the 1000 mesh white corundum in example 1 was replaced with 1250 mesh white corundum of equal mass. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Example 6

The preparation method provided by the embodiment 1 is referred to in this embodiment, and the difference between this embodiment and the embodiment 1 is that: the rutile titanium dioxide in example 1 was replaced with an equal mass of anatase titanium dioxide. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Comparative example 1

This comparative example, which is different from example 1 in that an aqueous coating material was prepared with reference to the preparation method provided in example 1: the pure acrylic emulsion of example 1 was replaced by an emulsion product of the same quality manufactured by the Baderfu company under the trade name RS-2205. The contact angle of the RS-2205 emulsion product is 45-50 degrees. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Comparative example 2

This comparative example, which is different from example 1 in that an aqueous coating material was prepared with reference to the preparation method provided in example 1: the pure acrylic emulsion of example 1 was replaced by an emulsion product of the same quality as manufactured by the Baderfu company under the trade name RS-2709, which RS-2709 emulsion product does not contain an organosilicon compound. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Comparative example 3

This comparative example, which is different from example 1 in that an aqueous coating material was prepared with reference to the preparation method provided in example 1: the white corundum in example 1 was replaced by an equal mass of glass frit. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Comparative example 4

This comparative example, which is different from example 1 in that an aqueous coating material was prepared with reference to the preparation method provided in example 1: the same quality rutile titanium dioxide is adopted to replace the white corundum in the example 1. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Comparative example 5

This comparative example, which is different from example 1 in that an aqueous coating material was prepared with reference to the preparation method provided in example 1: equal mass of 500 mesh white corundum was used instead of 1000 mesh white corundum in example 1. The proportions of the other raw materials and the preparation method are strictly consistent with those of the example 1.

Test example 1

A reference subject: the antifouling and abrasion-resistant water-based paint provided in examples 1 to 6 and the water-based paint provided in comparative examples 1 to 5.

(1) Hardness testing: the hardness of the paint film obtained by the test subject was measured at an ambient temperature of 23.+ -. 2 ℃ and a relative humidity of 50.+ -. 5% by referring to GB/T6739-2022 paint and varnish pencil method.

(2) Stain resistance test: and under the experimental condition of the ambient temperature (23+/-2) ℃ and the relative humidity (50+/-5)%, the stain resistance of the paint film prepared by a reference object is tested by referring to the brushing method A in GB/T9780-2013 test method for stain resistance of the paint film of the building paint.

The stain resistance is calculated according to formula (1):

formula (1):wherein X is _{Outer part} The reflectance of the coating of the exterior wall coating is reduced, A is the initial average reflectance of the coating, and B is the average reflectance of the coating after contamination test. The results were averaged over three panels and the relative error in the parallel measurement of the three panels should be no more than 15%.

(3) Hand feel test: after the coating construction of the test object was completed for 8 hours, the hand feel effect was evaluated by the "back of hand touch paint film surface method". The number of the estimated people cannot be less than 20, and the final average score is taken as the final assessment by adopting a blind measurement mode, and the specific assessment standard is shown in Table 2.

TABLE 2 evaluation of hand feel test results

Grade	Description of the invention	Scoring criteria/score
			Level 1	Soft and slippery, and strong skin feel like infants	More than or equal to 90 minutes
Level 2	Soft and smooth, leather feeling	More than or equal to 80 minutes<90 minutes
			3 grade	Smooth and good in touch feeling	More than or equal to 70 minutes<80 minutes
Grade 4	Smooth and general touch feeling	More than or equal to 60 minutes<70 minutes
			Grade 5	Feel similar to latex paint	<60 minutes

Test results: the test results of the above test are shown in table 3.

TABLE 3 test Performance of the paint films prepared by the test subjects

Group of	Hardness of pencil	Stain resistance (%)	Hand feel
				Example 1	HB	5.4	3 grade
Example 2	2B	8.5	Grade 4
				Example 3	B	7.8	3 grade
Example 4	HB	6.0	3 grade
				Example 5	HB	6.3	3 grade
Example 6	B	10.3	Grade 4
				Comparative example 1	2B	17.3	Grade 5
Comparative example 2	2B	18.9	Grade 5
				Comparative example 3	B	9.2	Grade 4
Comparative example 4	B	8.8	Grade 4
				Comparative example 5	HB	10	Grade 5

Note that: the column of "stain resistance" records the rate of decrease in the reflectance of the paint film, so that the smaller the number in the column of "stain resistance" is, the better the stain resistance of the paint film.

Analysis of results:

comparing the performances shown in Table 3 of examples 1 to 6 with those of comparative examples 1 to 5, it can be seen that the paint films prepared from the antifouling and wear-resistant aqueous paint provided in examples 1 to 6 have excellent comprehensive properties, which are characterized by high paint film hardness, good wear resistance, stain resistance and smooth hand feeling.

Comparing the comprehensive properties of examples 1-2 with those of comparative examples 1-2, it can be seen that the wear resistance, stain resistance, hand feeling and the like of the paint film are affected by different emulsions. Compared with the coatings provided in comparative examples 1-2, the coatings provided in examples 1-2 adopt hydrophilic pure acrylic emulsion containing organosilicon compounds and having a contact angle of 10-20 degrees, so that a film formed by the coating has good wear resistance, stain resistance and smooth hand feeling.

Comparing the combination properties of example 1 with those of comparative examples 3 to 4, it was found that the combination properties of the paint films of example 1, such as surface hardness, abrasion resistance, stain resistance, hand feel, etc., were superior to those of the paint films of comparative examples 3 to 4. The paint is prepared by matching white corundum with the hydrophilic pure acrylic emulsion, so that a paint film prepared by the paint has excellent hydrophilic water resistance, stain resistance, wear resistance, structural stability and smooth hand feeling.

Further, comparing the properties shown in Table 3 of examples 1, 4 to 5 with those of comparative example 5, it was found that as the particle size of white corundum becomes larger, the resultant paint film exhibits a tendency of increasing and then decreasing in the comprehensive properties such as surface hardness, abrasion resistance, stain resistance, hand feel, etc., wherein, when the particle size of white corundum is 800 to 1250 mesh, the resultant paint film has a good surface hardness, abrasion resistance, stain resistance, hand feel.

The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. The antifouling wear-resistant water-based paint is characterized by comprising a component A, a component B, a component C and a component D;

the component A comprises the following components in parts by weight: 30-40 parts of pure acrylic emulsion, wherein the contact angle of the pure acrylic emulsion is 10-20 degrees, and the pure acrylic emulsion contains an organosilicon compound;

the component B comprises the following components: 29-52 parts of filler, wherein the filler comprises 5-15 parts of white corundum, and the particle size of the white corundum is 800-1250;

the component C comprises the following components: 7.5 to 12.5 portions of auxiliary agent;

the D component comprises: 10-16 parts of aqueous solvent.

2. The aqueous exterior wall coating of claim 1, wherein: the solid content of the pure acrylic emulsion is 47-49%.

3. The antifouling and wear-resistant water-based paint according to claim 1, wherein the filler further comprises 6 to 12 parts of glass frit.

4. The antifouling wear-resistant water-based paint according to claim 1, wherein the filler further comprises 18-25 parts of titanium dioxide, and the titanium dioxide is rutile titanium dioxide.

5. An antifouling and abrasion-resistant aqueous coating as claimed in any of claims 1 to 4, wherein said auxiliary comprises a polyether siloxane copolymer-based auxiliary.

6. An antifouling and abrasion-resistant aqueous coating according to any of claims 1 to 4, wherein said adjuvant comprises a polysiloxane-based adjuvant.

7. An anti-fouling and abrasion-resistant aqueous coating according to any one of claims 1 to 4, wherein the auxiliary comprises a stain-resistant auxiliary having a fluorine-containing active group.

8. An antifouling and abrasion-resistant aqueous coating as claimed in any of claims 1 to 4, wherein said adjuvant comprises a multifunctional amine adjuvant.

9. An antifouling and abrasion-resistant aqueous paint according to any of claims 1 to 4, wherein said adjuvant comprises a sodium salt of a polycarboxylic acid.

10. A process for preparing an antifouling and abrasion-resistant aqueous coating according to any of claims 1 to 9, comprising the steps of:

step one, adding a part of the auxiliary agent in the component C into the component D to obtain a premix;

step two, mixing the premix with the component B, and grinding the slurry obtained after mixing until the particle fineness of the slurry is less than 50 mu m to obtain grinding dispersion slurry;

step three, uniformly mixing the grinding dispersion slurry and the component A to form semi-finished slurry;

and step four, adding the rest auxiliary agents in the component C into the semi-finished product slurry, and fully mixing to obtain a finished product.