阅读说明：本技术 喷涂涂料及其制备方法、喷涂方法 (Spray coating, preparation method thereof and spray coating method ) 是由 廖庆文 梁超 于 2020-06-30 设计创作，主要内容包括：本发明涉及涂料领域,公开了一种喷涂涂料及其制备方法、喷涂方法,喷涂涂料包括：水性环氧树脂乳液40～45份、水性丙烯酸乳液5～10份、丙二醇丁醚0.5～2份、分散体0.5～1.5份、分散剂1～2份、流平剂0.1～0.5份、消泡剂0.04～0.05份、去离子水20～25份、颜料1～2份及填料1～2份。本发明制备得到的喷涂涂料以去离子水作为稀释剂,可以进一步避免引入杂质,通过加入水性丙烯酸乳液,可以与水性环氧树脂乳液配合,得到易于喷涂,附着力好且韧性好的喷涂涂料,更快更好的进行喷涂,再通过添加丙二醇丁醚,有利于提高喷涂涂料的聚结性能,且丙二醇丁醚的毒性极低,可以保证喷涂涂料的环保性能,添加分散体及分散剂,有利于喷涂涂料制备过程中更好更快地进行搅拌分散,得到更加均匀的喷涂涂料。(The invention relates to the field of coatings, and discloses a spray coating, a preparation method thereof and a spraying method, wherein the spray coating comprises the following components: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler. The spray coating prepared by the invention takes deionized water as a diluent, so that impurities can be further prevented from being introduced, the spray coating which is easy to spray, good in adhesive force and toughness can be obtained by adding the water-based acrylic emulsion and can be matched with the water-based epoxy resin emulsion, the spray coating can be sprayed more quickly and better, the coalescence performance of the spray coating can be improved by adding the propylene glycol butyl ether, the toxicity of the propylene glycol butyl ether is extremely low, the environmental protection performance of the spray coating can be ensured, the dispersion and the dispersing agent are added, the spray coating can be stirred and dispersed better and more quickly in the preparation process, and the more uniform spray coating can be obtained.)

1. The spraying coating is characterized by comprising the following raw materials in parts by mass: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler.

2. The spray coating of claim 1 wherein said dispersant is at least one of polyethylene glycol 200 and polyethylene glycol 400.

3. The spray coating of claim 1 wherein the leveling agent is a fluorocarbon surfactant.

4. The spray coating of claim 1 wherein said defoamer is a polyether modified silicone based defoamer.

5. A spray coating according to claim 3 wherein said dispersion is graphene.

6. The spray coating of claim 1 wherein the filler is at least one of wollastonite powder and mica powder.

7. A method for preparing a spray coating according to any one of claims 1 to 6, comprising the steps of:

weighing the following raw materials in parts by weight: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler;

stirring and mixing the water-based epoxy resin emulsion, the water-based acrylic emulsion, the propylene glycol butyl ether, the dispersing agent, the flatting agent, the defoaming agent and the deionized water to obtain a first slurry;

stirring and mixing the pigment and the filler to obtain a mixed dry material, and dividing the mixed dry material into two parts according to a proportion to obtain a first mixed dry material and a second mixed dry material;

adding the first mixed dry material into the first slurry, and stirring and mixing to obtain a second slurry;

and adding the second mixed dry material into the second slurry, and stirring and mixing to obtain the spray coating.

8. The method for preparing a spray coating according to claim 7, wherein the proportion of the first dry mixed material to the second dry mixed material is 60-65.0%: 35 to 40 percent.

9. The method for preparing a spray coating according to claim 7, wherein the operation of filtering and drying the mixed dry material is further performed before the operation of dividing the mixed dry material into two parts in proportion.

10. A method of spraying a paint according to any one of claims 1 to 6, comprising the steps of:

cleaning a workpiece to be sprayed to clean the surface of the workpiece to be sprayed, preheating the workpiece to be sprayed, and controlling the preheating temperature to be 30-40 ℃;

and spraying the spraying coating on the surface of a workpiece by a spray gun, controlling the spraying thickness to be 20-28 microns, and then drying to finish the spraying.

Technical Field

The invention relates to the field of coatings, in particular to a spraying coating, a preparation method thereof and a spraying method.

Background

The coating is coated on the surface of a protected or decorated object and can form a firmly attached continuous film with the object to be coated, the formed film is generally called as a coating film or a paint film or a coating, the coating is usually prepared by taking resin, oil or emulsion as a main component, adding pigment, filler and corresponding auxiliary agents according to actual production needs and then using organic solvent or water, and the spraying coating has the characteristic of easy production, is suitable for industrial production and widely applied and universal, has wide application range, brings convenience to the life of people, can increase the durability of products and can also increase the aesthetic property of the products.

However, the types of the paint generally include an oil paint and a water-soluble paint, the oil paint is a paint using dry oil as a main film forming substance, and is easy to produce, low in price, good in brushing property, flexible in film coating and good in protection performance, but the oil paint contains pungent gas smell, contains more harmful substances, is not environment-friendly, is easily dangerous to the health of people, is flammable and not easy to store, while the water-soluble paint generally uses clean water as a diluent, does not contain harmful substances and is an environment-friendly material which is harmless to the health of people, however, the water-soluble paint generally uses water as a diluent, and the compatibility among the raw material substances is poor, so that the leveling property of the prepared paint finished product is easily influenced, the use of the paint is influenced, and the performance of the water-soluble paint needs to be improved.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the spray coating with good dispersibility and leveling property and more stable property, and the preparation method and the spray coating method thereof.

The purpose of the invention is realized by the following technical scheme:

the spraying coating comprises the following raw materials in parts by weight: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler.

In one embodiment, the dispersant is at least one of polyethylene glycol 200 and polyethylene glycol 400.

In one embodiment, the leveling agent is a fluorocarbon surfactant.

In one embodiment, the defoamer is a polyether modified silicone based defoamer.

In one embodiment, the dispersion is graphene.

In one embodiment, the filler is at least one of wollastonite powder and mica powder.

A preparation method of the spray coating comprises the following steps:

weighing the following raw materials in parts by weight: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler;

stirring and mixing the water-based epoxy resin emulsion, the water-based acrylic emulsion, the propylene glycol butyl ether, the dispersing agent, the flatting agent, the defoaming agent and the deionized water to obtain a first slurry;

stirring and mixing the pigment and the filler to obtain a mixed dry material, and dividing the mixed dry material into two parts according to a proportion to obtain a first mixed dry material and a second mixed dry material;

adding the first mixed dry material into the first slurry, and stirring and mixing to obtain a second slurry;

and adding the second mixed dry material into the second slurry, and stirring and mixing to obtain the spray coating.

In one embodiment, the proportion of the first dry mixed material to the second dry mixed material is 60% to 65.0%: 35 to 40 percent.

In one embodiment, before the operation of dividing the mixed dry material into two parts according to the proportion, the mixed dry material is further subjected to a filtering operation and then a drying operation.

A method of spraying a spray coating comprising the steps of:

cleaning a workpiece to be sprayed to clean the surface of the workpiece to be sprayed, preheating the workpiece to be sprayed, and controlling the preheating temperature to be 30-40 ℃;

and spraying the spraying coating on the surface of a workpiece by a spray gun, controlling the spraying thickness to be 20-28 microns, and then drying to finish the spraying.

Compared with the prior art, the invention has at least the following advantages:

the spray coating prepared by the invention takes deionized water as a diluent, so that impurities can be further prevented from being introduced, the quality of a finished spray coating product is favorably improved, the spray coating which is easy to spray, good in adhesive force and good in toughness can be obtained by adding the water-based acrylic emulsion and can be matched with the water-based epoxy resin emulsion, the spray coating can be sprayed faster and better, the coalescence performance of the spray coating is favorably improved by adding the propylene glycol butyl ether, the toxicity of the propylene glycol butyl ether is extremely low, the environmental protection performance of the spray coating can be ensured, the dispersion and the dispersing agent are added, the spray coating can be stirred and dispersed better and faster in the preparation process, the more uniform spray coating can be obtained, and the stability is better.

According to the preparation method, the raw materials are accurately weighed, and then the pigment and the filler are dry-mixed, so that the pigment and the filler can be uniformly mixed, the obtained dry mixed material is divided into two parts according to a proportion and added into the slurry twice, the pigment and the filler can be uniformly mixed, the agglomeration phenomenon is avoided, and the spraying coating with more uniformity and better stability can be obtained.

The spraying method of the invention carries out the pretreatment of cleaning and preheating on the workpiece, is beneficial to better adhering the spraying coating on the surface of the workpiece, has higher temperature, is beneficial to better flowing of the spraying coating on the workpiece, can better and more quickly finish the spraying, and has good spraying effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a flow chart of the steps of a method of preparing a spray coating according to one embodiment of the present invention;

fig. 2 is a flow chart illustrating the steps of a method for spraying a coating material according to an embodiment of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

One embodiment is a spraying coating, which comprises the following raw materials in parts by mass: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler.

The spraying coating is easy to spray, good in adhesive force and good in toughness, can be sprayed faster and better, and is favorable for improving the coalescence performance of the spraying coating by adding propylene glycol butyl ether, the toxicity of the propylene glycol butyl ether is extremely low, the environmental-friendly performance of the spraying coating can be ensured, the dispersion and the dispersing agent are added, the stirring and the dispersing can be better and faster in the preparation process of the spraying coating, the more uniform spraying coating is obtained, the stability is better, and the flatting agent can promote the coating to form a flat, smooth and high-temperature environment-friendly coating in the drying film-forming process, The coating is uniform, the surface tension of the coating liquid can be effectively reduced, the leveling property and uniformity of the coating liquid are improved, the defoaming agent can remove harmful foams generated in the production processes of industries such as latex, textile sizing, food fermentation, biomedicine, pesticide, coating, petrochemical industry, papermaking and industrial cleaning, and the pigment and the filler can be added according to specific production requirements.

In one embodiment, the dispersant is at least one of polyethylene glycol 200 and polyethylene glycol 400. It should be noted that polyethylene glycol 200 or polyethylene glycol 400 is a good dispersant for water-soluble dispersion systems, and polyethylene glycol 200 or 400 is lipophilic, and can form a stable dispersion system well with a dispersion with a lower hydrophilic-lipophilic balance value, that is, can achieve a good dispersion effect, and obtain a more stable spray coating.

In one embodiment, the leveling agent is a fluorocarbon surfactant. The leveling agent can promote the coating to form a flat, smooth and uniform coating film in the drying film-forming process, can effectively reduce the surface tension of the coating liquid and improve the leveling property and uniformity of the coating liquid, has various types, and generally adopts a surfactant or polyacrylic acid or carboxymethyl cellulose and the like in a water-based coating agent, so that the fluorocarbon surfactant is the most effective of all the leveling agents in reducing the surface tension and can achieve a good film-forming effect.

In one embodiment, the defoamer is a polyether modified silicone defoamer. It should be noted that, because the coating needs to be dispersed and stirred in the preparation process, foam can be generated, the foam needs to be treated, and the influence on the quality and performance of the finished spraying coating product is avoided, the use of the defoaming agent is the most effective method, the defoaming agent can inhibit the generation of foam, and can eliminate the generated foam at the same time, so that the quality of the prepared spraying coating can be greatly improved, the polyether modified silicone defoaming agent can be rapidly diffused to the surface of a foam membrane, so that the foam membrane is broken, the defoaming capability is strong, the chemical reaction of a bubble medium is not easy to occur, and the polyether modified silicone defoaming agent is nontoxic and harmless, is the most widely applied defoaming agent, and the polyether modified silicone defoaming agent can achieve a good defoaming effect, and meanwhile, the prepared spraying coating can be ensured to be nontoxic and harmless, and the.

In one embodiment, the dispersion is graphene. It should be noted that graphene has excellent heat conductivity, the heat conductivity coefficient of pure single-layer graphene is as high as 5300W/mK, and is a carbon material with the highest heat conductivity coefficient, when graphene is used as a carrier, the heat conductivity coefficient can also reach 600W/mK, graphene is adopted as a dispersion body, and the dispersion body is matched with a fluorocarbon surfactant, so that graphene can be well dispersed, the graphene is favorably and uniformly distributed in a spraying coating, the heat dissipation performance of the spraying coating can be greatly improved, the heat dissipation performance of a workpiece is improved after the spraying coating is coated on the workpiece, and the workpiece is suitable for a working environment with higher temperature.

In one embodiment, the filler is at least one of wollastonite powder and mica powder. The wollastonite powder and the mica powder are low in price and easy to obtain, and the wollastonite powder or the mica powder is used as a filler, so that the production cost of the spraying coating is reduced, and the production benefit is improved.

In one embodiment, referring to fig. 1, a method for preparing a spray coating includes the following steps:

s110, respectively weighing the following raw materials in parts by weight: 40-45 parts of water-based epoxy resin emulsion, 5-10 parts of water-based acrylic emulsion, 0.5-2 parts of propylene glycol butyl ether, 0.5-1.5 parts of dispersoid, 1-2 parts of dispersant, 0.1-0.5 part of flatting agent, 0.04-0.05 part of defoaming agent, 20-25 parts of deionized water, 1-2 parts of pigment and 1-2 parts of filler.

The coating is prepared by respectively weighing the components, the proportion of the components can be accurately controlled, the condition of excessive or deficient components is avoided, and the subsequent preparation is facilitated to obtain the spray coating with accurate proportion, so that the performance of the prepared spray coating is ensured, and specifically, the mass ratio of the water-based epoxy resin emulsion to the water-based acrylic emulsion to the propylene glycol butyl ether to the dispersion to the dispersant to the leveling agent to the defoaming agent to the deionized water to the pigment to the filler is (40-45): (5-10): (0.5-2): (0.5-1.5): (1-2): (0.1-0.5): (0.04-0.05): (20-25): (1-2): (1-2).

S120, stirring and mixing the water-based epoxy resin emulsion, the water-based acrylic emulsion, the propylene glycol butyl ether, the dispersing agent, the flatting agent, the defoaming agent and the deionized water to obtain a first slurry.

The method comprises the steps of stirring and mixing the water-based epoxy resin emulsion, the water-based acrylic emulsion, the propylene glycol butyl ether, the dispersing agent, the flatting agent, the defoaming agent and the deionized water to obtain a first slurry, taking the first slurry as a pre-prepared material, subsequently adding the pigment and the filler into the first slurry, uniformly mixing to obtain the spraying coating, avoiding adding the filler and the pigment into the first slurry and stirring and mixing at the same time, and being beneficial to better uniformly mixing the raw materials because the pigment and the filler are granular, forming a more uniform first slurry firstly and being beneficial to better mixing the pigment and the filler subsequently.

S130, stirring and mixing the pigment and the filler to obtain a mixed dry material, and dividing the mixed dry material into two parts according to a proportion to obtain a first mixed dry material and a second mixed dry material.

It should be noted that, the pigment and the filler can be stirred and mixed by a dry mixer, because the filler and the pigment are granular substances, the pigment and the filler are stirred and mixed uniformly, so that a uniformly mixed dry material is obtained, the pigment and the filler are uniformly mixed together, the pigment and the filler are more uniformly added into the first slurry, the mixed dry material is divided into two parts, the first mixed dry material and the second mixed dry material are obtained, the first mixed dry material and the second mixed dry material are sequentially and gradually added into the first slurry, the excessive mixed dry material added at one time is avoided, the mixed dry material is better and more rapidly mixed with the first slurry uniformly, the agglomeration phenomenon is avoided, the mixing effect is good, and the more uniform and more stable spraying coating can be obtained.

In one embodiment, the proportion of the first dry mixed material to the second dry mixed material is 60% to 65.0%: 35 to 40 percent. The proportion of the first dry mixed material to the second dry mixed material is 60-65.0%: 35% -40%, that is to say, the weight proportion of the first mixed dry material is greater than that of the second mixed dry material, before the first mixed dry material is added, the content of particles in the first slurry is low, so that the pigment and the filler can be better mixed and blended, the weight of the first mixed dry material is large, when the first mixed dry material is subsequently added, more mixed dry materials can be added, the first slurry and more mixed dry materials can be stirred and mixed firstly, the mixing effect is good, meanwhile, when the second mixed dry material is subsequently added, the weight of the second mixed dry material is low, the agglomeration phenomenon is not easy to occur, the uniformity of mixing the mixed dry materials and the first slurry can be further improved, the agglomeration phenomenon can be further avoided, and the more uniform spraying coating can be obtained.

S140, adding the first mixed dry material into the first slurry, and stirring and mixing to obtain a second slurry.

It should be noted that, the distributed first mixed dry material is added into the first slurry, and through stirring and mixing operations, the first mixed dry material and the first slurry can be uniformly mixed to obtain a uniform second slurry, and the second slurry is used as a further preparation material for subsequent mixing with the second mixed dry material to prepare a finished spraying coating product.

S150, adding the second mixed dry material into the second slurry, and stirring and mixing to obtain the spray coating.

It should be noted that, the second dry mixed material is added into the uniformly mixed second slurry, and the second dry mixed material and the second slurry can be uniformly mixed through stirring and mixing operations, so as to prepare a finished spray coating product.

In one embodiment, before the operation of dividing the dry mixed material into two parts according to a certain proportion, the dry mixed material is further filtered and then dried. It should be noted that, through filtering the mixed dry material, larger particles in the pigment and the filler can be removed, and the oversize particles are prevented from entering the slurry, so that large particles in the prepared spraying coating are prevented from being contained, the uniformity and the fluidity of the prepared spraying slurry are improved, and the quality of a finished product is improved.

In one embodiment, after the second dry mixture is added to the second slurry and the stirring and mixing operation is performed, a filtering operation is further performed. It should be noted that, through the filtering operation, larger particles in the slurry can be further removed, which is beneficial to obtaining a finished sprayed coating product with better uniformity, and greatly improves the quality of the finished product.

In one embodiment, referring to fig. 2, a method for spraying a coating material includes the following steps: s210, cleaning a workpiece to be sprayed to clean the surface of the workpiece to be sprayed, and then preheating the workpiece to be sprayed, wherein the preheating temperature is controlled to be 30-40 ℃; s220, spraying the spraying coating on the surface of the workpiece through a spray gun, controlling the spraying thickness to be 20-28 microns, and then drying to finish spraying. It should be noted that, the workpiece is cleaned, stains on the surface of the workpiece can be removed, the surface of the workpiece is kept clean, normal operation of spraying is prevented from being influenced, the spraying uniformity is favorably improved, the workpiece can be cleaned through a cleaning agent, the cleaning effect is good, the workpiece is preheated, the workpiece can reach a higher temperature, spraying paint can flow on the workpiece, the subsequent spraying can be favorably carried out faster and better, the spraying effect is good, the temperature is controlled to be 30-40 ℃, when the temperature is higher than 40 ℃, the temperature is too high, the performance and the shape of the workpiece can be influenced, the quality of a finished workpiece product is influenced, when the temperature is lower than 30 ℃, the promotion effect on the fluidity of the spraying paint is not obvious, the spraying effect and the spraying efficiency are not favorably improved, under the comprehensive consideration, the temperature is controlled to be 30-40 ℃, after the workpiece is pretreated, the spraying coating is sprayed on the workpiece by a spray gun, the spraying thickness is controlled to be 20-28 mu m, the phenomenon that the spraying thickness is too thick or too thin is avoided, and the appearance quality of the finished product of the workpiece can be ensured.

In one embodiment, before cleaning the workpiece to be sprayed to clean the surface of the workpiece to be sprayed, a punching operation is performed on the workpiece to be sprayed to form a plurality of grooves on the surface of the workpiece to be sprayed, the radius of each groove is controlled to be 0.5 μm to 0.8 μm, and the depth of each groove is controlled to be 0.5 μm to 0.8 μm. It should be noted that, before the workpiece is cleaned, the workpiece is perforated, and then cleaned after being perforated, so that the powder scraps generated by the perforation can be cleaned and removed together, the surface of the obtained groove is clean, and the subsequent spraying can be conveniently carried out, through the perforating operation, a plurality of grooves can be formed on the surface of the workpiece, the surface area of the workpiece can be increased, and the contact area of the spraying coating and the workpiece can be increased, on one hand, the spraying coating can be better coated on the workpiece and better combined with the workpiece, the coating layer of the obtained workpiece finished product can be more firmly adhered on the workpiece, the coating layer can be further prevented from falling off, on the other hand, a plurality of grooves can be filled by the spraying coating, a coating column is formed on the surface of the workpiece, so that the spraying coating and the workpiece form a chimeric structure, and the spraying coating and the workpiece are tightly combined together, the finished product quality of the workpiece is further improved, meanwhile, the contact area between the spraying coating and the workpiece is increased by matching with the graphene dispersion raw material in the spraying coating, so that the heat inside the workpiece is guided out and dissipated to the environment by the graphene, the heat dissipation performance of the workpiece is greatly improved, the working environment is more suitable, the applicability is better, specifically, the grooves are uniformly arranged at intervals, a more stable embedded structure is favorably formed, a more stable coating layer structure is formed, and the quality of the obtained finished product of the workpiece is higher, wherein the radius of each groove is controlled to be 0.5-0.8 mu m, the depth of each groove is 0.5-0.8 mu m, namely the radius of each groove is controlled to be 0.5-0.8 mu m, the depth is 0.5-0.8 mu m, the moderate degree of each groove can be ensured, and the volume of each groove is prevented from being too large or too small, although the spraying paint is favorably embedded with the workpiece along with the increase of the volume of the grooves, when the volume of the grooves is too large, the appearance of the workpiece is easily affected, and when the volume of the grooves is too small, the embedding effect of the spraying paint and the coating is affected, and under the comprehensive consideration, the radius of each groove is controlled to be 0.5-0.8 μm, and the depth of each groove is preferably controlled to be 0.5-0.8 μm. Preferably, before the operation of cleaning the workpiece to be sprayed to clean the surface of the workpiece to be sprayed, a punching operation is further performed on the workpiece to be sprayed to form a plurality of grooves on the surface of the workpiece to be sprayed, the radius of each groove is controlled to be 0.65 μm, and the depth of each groove is controlled to be 0.65 μm.

Compared with the prior art, the invention has at least the following advantages:

the spray coating prepared by the invention takes deionized water as a diluent, so that impurities can be further prevented from being introduced, the quality of a finished spray coating product is favorably improved, the spray coating which is easy to spray, good in adhesive force and good in toughness can be obtained by adding the water-based acrylic emulsion and can be matched with the water-based epoxy resin emulsion, the spray coating can be sprayed faster and better, the coalescence performance of the spray coating is favorably improved by adding the propylene glycol butyl ether, the toxicity of the propylene glycol butyl ether is extremely low, the environmental protection performance of the spray coating can be ensured, the dispersion and the dispersing agent are added, the spray coating can be stirred and dispersed better and faster in the preparation process, the more uniform spray coating can be obtained, and the stability is better.

According to the preparation method, the raw materials are accurately weighed, and then the pigment and the filler are dry-mixed, so that the pigment and the filler can be uniformly mixed, the obtained dry mixed material is divided into two parts according to a proportion and added into the slurry twice, the pigment and the filler can be uniformly mixed, the agglomeration phenomenon is avoided, and the spraying coating with more uniformity and better stability can be obtained.

The spraying method of the invention carries out the pretreatment of cleaning and preheating on the workpiece, is beneficial to better adhering the spraying coating on the surface of the workpiece, has higher temperature, is beneficial to better flowing of the spraying coating on the workpiece, can better and more quickly finish the spraying, and has good spraying effect.

The following is an example section