CN114316702A

CN114316702A - Water-based woodware coating and preparation method and use method thereof

Info

Publication number: CN114316702A
Application number: CN202111538814.7A
Authority: CN
Inventors: 周灿; 文华琼
Original assignee: Shanghai Libang Changrunfa Coating Co ltd
Current assignee: Henan Libang Changrunfa Technology Material Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-04-12

Abstract

The application relates to the field of coatings, in particular to an aqueous woodenware coating and a preparation method and a using method thereof, the aqueous woodenware coating adopts the combination of a nonionic emulsifier and an aqueous acrylic emulsion, and controls the vitrification temperature of the aqueous acrylic emulsion to be higher than 50 ℃, under the scheme, after the aqueous woodenware coating is coated on the surface of woodenware or other materials, the coating can be directly placed in an oven for drying without waiting for leveling, and the surface has few phenomena of cracking, flaws, miliaria, pinholes and the like, thereby having the effects of improving the surface smoothness of the woodenware and reducing the production cost.

Description

Water-based woodware coating and preparation method and use method thereof

Technical Field

The application relates to the field of coatings, in particular to a water-based wood coating and a preparation method and a using method thereof.

Background

The woodware coating has important economic value in the rapid development of the woodware industry today.

The water-based wood coating is one of wood coatings, and the total station ratio of the water-based wood coating in the wood coating is still low at present, and the reason is that the water-based wood coating is very easily influenced by the ambient temperature in the construction process, and the performances of thick coating cracking, leveling, sagging, hidden-bubble miliaria and the like are difficult to balance in a high-temperature low-humidity environment.

Generally, when the temperature of the aqueous wood coating is higher than 35 ℃ and the humidity is less than 30% RH, the above problems are caused, and at present, with the application of a rapid coating machine, the spraying environment is more difficult to control, for example, in some scenes, after the workpiece is completely sprayed, the workpiece needs to directly enter an infrared drying room for drying, the temperature in the drying room is generally about 50 ℃, and the humidity is generally lower than 20%, which is very easy to cause the above undesirable phenomena.

At present, in order to reduce the problems, after the water-based paint is constructed, a workpiece is generally required to be placed for 10-20 min, leveling defoaming is carried out, and forced drying is carried out. However, some manufacturers are limited in space and need to perform drying treatment immediately after construction is completed, which also greatly limits the application of the waterborne wood coating.

Disclosure of Invention

In order to provide the water-based wood coating which does not need extra leveling time and is not easy to crack, prickly heat, pinholes and the like after being dried, the application provides the water-based wood coating and a preparation method and a use method thereof.

Firstly, the application provides a water-based wood coating which comprises the following components in percentage by mass:

wherein the emulsifier is a nonionic emulsifier, and the glass transition temperature of the aqueous acrylic emulsion is more than or equal to 50 ℃.

In the technical scheme, the combination of the high-Tg water-based acrylic acid and the nonionic emulsifier is adopted, and experiments prove that the combination has obvious cracking resistance. The amount of the emulsifier is also critical, too little amount can cause the anti-cracking effect of the emulsifier to be not obvious, and too much amount can cause the hardness of a paint film to be reduced and the adhesive force to be poor.

In the technical scheme, the non-ionic emulsifier can improve the volatilization gradient of the paint film, so that the overall structure of the paint film can tend to be complete in the drying process, and the addition of the defoaming agent can reduce the amount of foam in the water-based paint, so that the effects of uniformity, stability and few defects can be realized without leveling treatment, and the paint film has better construction tolerance.

In addition, the magnesium silicate lithium slurry is prepared by adding magnesium silicate lithium into water, the concentration of the magnesium silicate lithium slurry is 10-20%, and the magnesium silicate lithium slurry plays roles of a thickening agent and a thixotropic agent.

Preferably, the emulsifier is any one of FDC, EL-80 and EL-90, or the combination of any two or more. More preferably, the aqueous acrylic emulsion is Opuntia 3660, and the emulsifier is FDC.

The emulsifier has good film volatilization gradient, so that the phenomena of cracking, blasting pits and miliaria of the prepared coating are further reduced. By adopting the combination of the European patent No. 3660 and the FDC, the whole anti-cracking capability is better.

Optionally, the other additives comprise the following components in percentage by mass:

1-3% of a flatting agent;

2-4% of wax emulsion.

In the technical scheme, the flatting agent and the wax emulsion are further added, on one hand, the flatting agent can generate a matte effect, the wax emulsion has the effects of improving the anti-blocking property of a system and improving the hand feeling, and after the components are added, the whole coating is more consistent with the texture of the woodware.

Optionally, the other additives further comprise dialdehyde starch accounting for 1-1.5% of the mass of the water-based wood coating.

The dialdehyde starch can provide certain viscosity in the system, which is helpful for improving the cohesive force of the water-based acrylic resin and further reducing the cracking foaming phenomenon generated in the drying and curing process of the water-based acrylic resin.

Optionally, the other additives further comprise liquid ceramics accounting for 0.3-0.5% of the mass of the water-based wood coating.

The liquid ceramic can further improve the cohesive force of the polyacrylic emulsion in the curing process, can reduce cracking in the heating process, and can enable the interior of the paint surface to form a better network structure in the heating process, so that the liquid ceramic has a better strengthening effect on the paint layer.

Optionally, the other additives further comprise a coupling agent accounting for 0.5-0.1% of the mass of the water-based wood coating.

The coupling agent can be a silane coupling agent, a titanate coupling agent, an aluminate coupling agent or other coupling agents with similar effects, the coloring uniformity and the strength of the wood coating are improved, and meanwhile, a stronger cohesive structure is formed by the coupling agent and the liquid ceramic, so that the system is more uniform under the condition of no leveling, and the processing performance of the wood coating is further improved.

Optionally, the mass fraction of the magnesium silicate lithium slurry is 10%.

The magnesium silicate lithium slurry with the mass concentration of 10% can better play a role in thickening and thixotropy, and meanwhile, the integral uniformity of the wood coating is improved.

Optionally, the film forming agent is a combination of at least two of dipropylene glycol monomethyl ether, dipropylene glycol monobutyl ether, propylene glycol butyl ether, diisobutyl dicarboxylate, diethylene glycol butyl ether, diethylene glycol ethyl ether, dipropylene glycol dimethyl ether, and alcohol ester 12.

In the technical scheme, the combination of more than two film forming agents is selected, so that the lowest film forming temperature of the coating can be reduced, the formed gradient volatilization effect is achieved, and the effect of the emulsifier in the application is effectively adjusted.

Preferably, the wetting agent is one of TEGO4100, TEGO270, BYK-346, BYK-3455, or a combination of at least two of the foregoing components.

By adopting the wetting agent, the surface tension of the coating system can be reduced, so that the coating can be well wetted and spread on the surface of a workpiece, a more uniform coating is formed, and surface defects are further reduced.

Optionally, the defoaming agent is one of TEGO902W, TEGO822, TEGO825, TEGO810, BYK-024, BYK-022, BYK-028 and 2503EFKA, or a combination of at least two of the above components.

Optionally, the wax emulsion is one or more of BYK AQUACER 535, BYK AQUACER 539, and Keim-Aidditec E-360.

In the technical scheme, the organic silicon defoaming agent is adopted, so that the effects of improving the application property, enhancing the compactness of the paint film and improving the appearance of the paint film are achieved.

In addition, the application also provides a preparation method of the water-based wood coating, which comprises the following steps:

s1, adding a pH regulator and a part of defoaming agent into the water-based acrylic resin, and stirring at 400-600 rpm for 10-15 min to obtain a first mixed component; wherein the added defoaming agent accounts for 25-50% of the total defoaming agent by mass;

s2, premixing the film forming agent, the wetting agent, part of deionized water, the thickening agent and the rest of the defoaming agent, slowly adding the premixed materials into the first mixed component, stirring the first mixed component at the speed of 800-1000 rpm in the adding process, and continuously and uniformly mixing the premixed materials after the adding is finished to obtain a second mixed component; in the step, the used deionized water accounts for 33.3-71.5% of the total mass of the deionized water;

s3, adding the rest deionized water and the magnesium lithium silicate slurry into the second mixed component under the condition of stirring at the speed of 500-600 rpm, and then continuously mixing at the stirring speed of 1000-1200 rpm until the mixture is uniform to obtain a third mixed component;

and S4, adding the white slurry and the emulsifier into the third mixed component under the stirring of 500-600 rpm, and continuously and uniformly mixing to finish the preparation.

The water-based wood coating prepared by the preparation method has good construction performance, does not need leveling treatment after construction, can be quickly dried, and has low requirement on drying conditions. In the process, all the components are uniformly mixed, the overall performance of the coating is relatively stable, and the coating is more uniform and compact.

Optionally, step S3 is specifically as follows: and adding a delustering agent into the second mixed component, uniformly mixing at the rotating speed of 1000-1200 rpm, and then adding the wax emulsion, deionized water and the magnesium silicate lithium slurry.

In the technical scheme, the flatting agent and the wax emulsion are added in sequence in the step S3, so that the whole color is uniform, the coating is uniform and stable, and the coating is natural and beautiful. And all the components are mixed more uniformly.

In addition, if other additives include components other than the matting agent and the wax emulsion, which need to be added, the magnesium lithium silicate slurry is added together in step S2.

In addition, the application also provides a using method of the water-based wood coating, wherein the water-based wood coating is sprayed by adopting a high-pressure mixed gas spraying method, and is dried at the temperature of 50 +/-2 ℃ and the humidity of not higher than 20% after the spraying is finished.

Among the above-mentioned technical scheme, after the spraying, need not to wait for the coating levelling, can directly carry out the fast drying and handle, the stoving is handled the back surface and also comparatively levels, helps reducing the space occupation in workshop, improves production efficiency, reduction in production cost.

In summary, the present application includes at least one of the following advantages:

1. in this application, through the combination of nonionic emulsifier and high Tg waterborne acrylic resin, add the defoaming agent simultaneously, the waterborne wood coating that obtains through this scheme preparation has stronger levelling performance, and the roughness is better, need not to carry out the drying through levelling treatment, and there is not inhomogeneous phenomena such as fracture, prickly heat, big gun hole, pinhole after the drying rarely, helps improving the quality of coating back work piece.

2. In this application further sets up, through the combination that adopts FDC and European Baodi 3660, obtain better anti cracking performance for the wholeness ability of wooden furniture is better after the coating, and the surface is more even level and smooth.

3. The application also provides a preparation method and an application method of the water-based wood coating, and the coating prepared by the method can be directly dried without leveling treatment after use, so that the processing procedures can be reduced, and the production cost of enterprises can be reduced.

Detailed Description

Compared with oil paint, the water paint is more environment-friendly and healthy. In the preparation and use processes of the water-based paint, the substrate is water, the used organic solvent is less, and the water-based paint is not easy to volatilize and generate toxic and harmful gases, so that the water-based paint is an important direction for the development of the field of future paints.

But relatively, water based paint also has certain problem, especially when applying to the wooden furniture surface, and water based paint spouts the back that finishes again, needs longer time to carry out the levelling defoaming, dries again, and this needs to occupy the huge space of processing enterprise undoubtedly, has also reduced the production efficiency of enterprise simultaneously.

In the application, the selected types and the used amounts of the emulsifier, the flatting agent and the emulsion are adjusted, so that the water-based paint can be directly dried without being subjected to flatting treatment after being sprayed, the production cost of enterprises is greatly reduced, the production efficiency is improved, and the water-based paint has great economic value. The present application will be described in further detail with reference to examples and comparative examples.

Examples 1 to 3, specific material ratios of an aqueous woodenware coating are shown in table 1.

Comparative examples 1-2, a water-based wood coating, the specific material formulation is shown in table 1.

Component ratios in Table 1, examples 1 to 3 and comparative examples 1 to 2

Components	Example 1	Example 2	Example 3	Comparative example 1	Comparative example 2
						Aqueous acrylic emulsion	57.3	53.7	51	55.7	51.7
pH regulator	0.1	0.2	0.3	0.2	0.2
						Antifoam agent 1	1.1	1.3	1.6	1.3	1.3
Defoaming agent 2	0	0	0	0	0
						Film-forming agent 1	4	6	8	6	6
Film-forming agent 2	0	0	0	0	0
						Wetting agent 1	0.3	0.5	0.7	0.5	0.5
Wetting agent 2	0	0	0	0	0
						Thickening agent	0.2	0.3	0.4	0.3	0.3
White pulp	30	28	25	28	28
						Emulsifier	2	3	4	1	5
Deionized water	5	7	9	7	7

In examples 1 to 3 and comparative examples 1 to 2, the preparation method of the aqueous wood coating comprises the following steps:

s1, adding a pH regulator and a defoaming agent 1 into the water-based acrylic resin, and stirring at 400rpm for 10min to obtain a first mixed component;

s2, premixing the film forming agent 1, the wetting agent 1, part of deionized water and the thickening agent, slowly adding the premixed materials into the first mixed component, keeping the first mixed component stirred at the speed of 1000rpm in the adding process, and continuously stirring for 20min after the adding is finished to obtain a second mixed component; in the step, the used deionized water accounts for one third of the total mass of the deionized water;

s3, adding the rest deionized water and the magnesium lithium silicate slurry into the second mixed component under the condition of stirring at the speed of 600rpm, and then continuously mixing at the stirring speed of 1000rpm until the mixture is uniform to obtain a third mixed component;

and S4, adding the white pulp and the emulsifier into the third mixed component under the stirring of 500rpm, and continuously and uniformly mixing to finish the preparation.

In examples 1 to 3 and comparative examples 1 to 2, the emulsion was eupatori 3660, the nonionic emulsifier was FDC, the pH adjuster was DMEA, the defoamer 1 was TEGO902W, the film former 1 was dipropylene glycol monomethyl ether, the wetting agent 1 was TEGO4100, the thickener was wawa U605, the magnesium lithium silicate slurry was Bentone DE from deutsche, the concentration was 10%, and the wax emulsion was BYK uaaqcer 535.

Examples 4 to 8 are different from example 2 in that the emulsifier was replaced with EL-80, EL-90, TRITON X-405, TRITON X-100, and Pluronic PE 3100 in equal mass.

Comparative example 3, an aqueous wood coating, differs from example 2 in that the emulsifier, etc. is replaced by DOWFAX 8390 anionic surfactant, etc.

Comparative example 4, an aqueous wood coating, differs from example 2 in that the emulsifier, etc. was replaced by DOWFAX AS 801 anionic surfactant.

Comparative example 5, an aqueous woodenware coating, differs from example 2 in that the emulsifier was equally mass replaced with VARISOFT-3696 cationic surfactant.

Comparative example 6, an aqueous woodenware coating, differs from example 2 in that the emulsifier etc. is replaced by REWOQUAT CPEM cationic surfactant.

Examples 9 to 14 are different from example 2 in that specific components are shown in table 2.

Composition ratios (%)

Wherein the film forming agent 2 is dipropylene glycol monobutyl ether. The matting agent and the wax emulsion are added to the system in step S3 together with other components. The matting agent is degussa OK520, and the wax emulsion is BYK AQUACER 535.

Examples 15 to 18 are different from example 11 in that the specific selection of the film forming agent 1 and the film forming agent 2 is shown in table 3.

Film Forming agent selection in Table 3, examples 15-18

In examples 11 to 18, both the film forming agent 1 and the film forming agent 2 were added to the system in step S2.

Examples 19 to 22 are different from example 11 in that an emulsion is adjusted, and the selection of the emulsion is shown in table 5.

Meanwhile, with respect to the emulsion, the following comparative examples were set.

Comparative examples 7 to 10, which are all aqueous wood coatings, are different from example 11 in that the aqueous acrylic emulsion is replaced by other emulsions, specifically shown in table 4

Specific selection of emulsions in Table 4, examples 19-22, and comparative examples 7-10

Further, the antifoam and wetting agent were adjusted to give the following examples.

Examples 23 to 27 are different from example 11 in the material composition shown in table 5.

Table 5, example 23 ~ 27 component ratio

Wherein, defoaming agent 1 and defoaming agent 2 all select TEGO902W, and wetting agent 2 selects TEGO 270.

In examples 23 to 27, defoaming agent 2 was added in step S2, and wetting agent 2 was added in step S2.

Examples 28 to 34 are different from example 23 in that selection of an antifoaming agent 1, an antifoaming agent 2, a wetting agent 1, and a wetting agent 2 was adjusted, and specifically, as shown in table 6.

Table 6, selection of defoaming and wetting agents in examples 28 to 34

Material(s)	Antifoam agent 1	Defoaming agent 2	Wetting agent 1	Wetting agent 2
					Example 28	TEGO902W	TEGO810	TEGO4100	TEGO270
Example 29	TEGO902W	BYK-024	TEGO4100	TEGO270
					Example 30	TEGO902W	BYK-022	TEGO4100	TEGO270
Example 31	TEGO902W	2503EFKA	TEGO4100	TEGO270
					Example 32	TEGO902W	TEGO825	TEGO4100	TEGO270
Example 33	TEGO902W	TEGO825	TEGO4100	BYK-346
					Example 34	TEGO902W	TEGO825	TEGO4100	BYK-3455

Example 35, an aqueous wood coating, different from example 32, includes in step S3, adding a matting agent to the second mixed component, stirring and mixing the mixture at 1000rpm, and adding a wax emulsion, deionized water and a magnesium lithium silicate slurry, including the following steps:

s3, adding a matting agent into the second mixed component under the condition of stirring at a speed of 600rpm, uniformly stirring and mixing at a speed of 1000rpm, adding the rest deionized water, the magnesium silicate lithium slurry and the wax emulsion, and continuously mixing at a stirring speed of 1000rpm until the mixture is uniform to obtain a third mixed component;

Example 36, a difference from example 35, is that the specific parameters in the steps are adjusted as follows:

s1, adding a pH regulator and a defoaming agent 1 into the water-based acrylic resin, and stirring at 600rpm for 15min to obtain a first mixed component;

s2, premixing the film forming agent 1, the wetting agent 1, part of deionized water and the thickening agent, slowly adding the premixed materials into the first mixed component, keeping the first mixed component stirred at the speed of 800rpm in the adding process, and continuously stirring for 20min after the adding is finished to obtain a second mixed component; in the step, the deionized water accounts for 71.5 percent of the total mass of the deionized water;

s3, adding a matting agent into the second mixed component under the condition of keeping stirring at the speed of 500rpm, uniformly stirring and mixing at the speed of 1200rpm, adding the rest deionized water, the magnesium silicate lithium slurry and the wax emulsion, and continuously mixing at the stirring speed of 1200rpm until the mixture is uniform to obtain a third mixed component;

and S4, adding the white slurry and the emulsifier into the third mixed component under the stirring of 600rpm, and continuously and uniformly mixing to finish the preparation.

Examples 37 to 43 are different from example 35 in that other additives further include at least one of dialdehyde starch, liquid ceramic, and a coupling agent, and specific components are shown in table 7. Among these, dialdehyde starch was purchased from gold Yun bio, and liquid ceramics were purchased from huada nano.

Table 7, example 37 ~ 43 component ratio

In examples 41 to 43, the coupling agent was silane coupling agent HK-550.

Example 44, an aqueous wood coating, differs from example 43 in that the coupling agent etc. is replaced by tetrabutyl titanate by mass.

In examples 36 to 44, the other additional additives were added together with the magnesium lithium silicate.

The following experiments were conducted for the above examples and comparative examples.

Leveling property: the measurement is carried out according to the method in GB 1750-79(89) paint leveling measurement (abandoned), wherein the woodware paint is coated on the wood board to be treated by adopting a brush coating method, and the leveling time is measured without changing other measurement methods.

Viscosity: and (3) measuring the viscosity of the wood coating at 25 ℃ by adopting a stormer viscometer.

Opening-dilution ratio: before construction, a certain amount of water is added into the wood coating until the viscosity of the wood coating reaches 64-66, and the amount of the added water accounts for the specific gravity of the wood coating and is the open-dilute ratio.

Construction viscosity: and (3) measuring the viscosity of the wood coating at 25 ℃ by adopting a stormer viscometer under the water mixing amount of the open-dilute ratio.

The method comprises the following steps of (1) anti-sagging: the diluted woodware coating is measured by GB/T9264-2012 evaluation of sag resistance of paint and varnish.

Meanwhile, the following construction method is adopted, the woodware coating diluted according to the proportion is constructed on a specific material, and the measurement is carried out.

Spraying by adopting a high-pressure gas-mixed spraying machine, wherein the coating linear speed is 3m/s, and the coating amount is 200g/m²The wet film thickness is 200 μm, and after spraying, the film is dried for 20min at 50 + -2 ℃ and 20% humidity.

The woodware coating is respectively coated on a PVC substrate, a PVC substrate coated with UV primer and a PVC substrate coated with PU primer, and the woodware coating is subjected to the marking test of GB/T9286-1998 color paint and varnish paint film

Hardness: the hardness of the diluted woodware coating is determined by GB/T6739 & 2006 paint film hardness determination by a varnish pencil method.

Surface effect: the coating is coated on a woodware workpiece, and the phenomena of cracking, grooves and the like are observed after the coating is dried.

First, the above experiments were carried out for examples 1 to 8 and comparative examples 1 to 6, and the results are shown in table 8.

Table 8, examples 1 to 8 and comparative examples 1 to 6

In the above embodiments, the nonionic emulsifiers are selected in the embodiments 1 to 8, the anionic surfactants are used in the comparative examples 3 to 4, and the cationic surfactants are selected in the comparative examples 5 to 6, so that the nonionic emulsifiers have obvious advantages compared with other emulsifiers. After the emulsifier is added, the surface stability can be obviously improved, the leveling property is improved, the flaws of surface cracking, shrinkage cavity and the like are reduced, and the surface effect of the coated woodware is improved.

Further, in examples 9 to 18, a matting agent and a wax emulsion were added to the system, and the two agents mainly maintain the gloss of the paint surface, and the ratio of the film-forming agents was adjusted, so that the film-forming agent of the single component was replaced by the film-forming agent of the two components, and the obtained experimental results are shown in table 9.

Table 9 and Experimental results of examples 9 to 18

In examples 11 to 18, different film forming agents were used, and it can be seen that, by using a combination of a plurality of film forming agents, a gradient volatilization effect can be formed by the difference between the boiling point and the polarity of the quality inspection of the film forming agents, so that the minimum film forming temperature of the coating is reduced, the surface has a smoother property, and the surface defects are further reduced. In most cases, any combination of two film formers is used, which has a stronger effect than the use of a single film former, and there is generally no particular requirement for the ratio of film formers.

The experimental results of examples 19 to 22 and comparative examples 7 to 10 are shown in Table 10.

Table 10, examples 19 to 22, and comparative examples 7 to 10

In the above examples and comparative examples, the glass transition temperature of the aqueous acrylic resin was adjusted, and it was found that the aqueous acrylic emulsion having a glass transition temperature higher than 50 ℃ had similar effects in the case of different solid contents, demonstrating that the key point in the present application is the combination of the high TG aqueous acrylic emulsion and the nonionic surfactant. The high glass transition temperature helps to reduce emulsion vitrification during curing, greatly reducing the possibility of cracking.

The experimental results of examples 23 to 34 are shown in Table 11.

Table 11, examples 23 to 34 and the results of the experiments

According to the experimental results, different defoaming agents and wetting agents are selected, so that the wetting agents have small influence on the overall properties of the wood coating.

The results of the experiments conducted in examples 35 to 44 are shown in Table 12.

Table 12, examples 35 to 43 and the results of the experiments

According to the experimental data, the adhesive force is mainly improved by adding the dialdehyde starch, the viscosity of the system is increased to a certain extent, and the phenomena of smooth surface, no cracking, no pinholes and no miliaria can be realized by using the dialdehyde starch alone. The dialdehyde starch has a good coordination effect on amino and improves the adhesive force and the flatness to a certain extent. In addition, liquid ceramics were added in examples 39 to 42, and a coupling agent was also added in examples 41 to 42. The optimization of the two methods is beneficial to improving the cohesion of a paint film, further reducing the uneven phenomena of cracking, foaming and the like in the drying process and also having obvious promotion effect on the improvement of the adhesive force.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.

Claims

1. The water-based wood coating is characterized by comprising the following components in percentage by mass:

0.1-0.3% of a pH regulator;

1.1-1.6% of defoaming agent;

4-8% of a film forming agent;

0.3-0.7% of wetting agent;

0.2-0.4% of a thickening agent;

0-10% of other auxiliary agents;

2-4% of magnesium lithium silicate slurry;

25-30% of white pulp;

2-4% of an emulsifier;

5-9% of deionized water;

the balance of aqueous acrylic emulsion;

2. The aqueous woodenware coating according to claim 1, wherein the other additives comprise the following components in percentage by mass:

1-3% of a flatting agent;

2-4% of wax emulsion.

3. The aqueous woodenware coating according to claim 1, wherein the other additives further comprise dialdehyde starch accounting for 1-1.5% of the aqueous woodenware coating by mass.

4. The aqueous woodenware coating according to claim 1, wherein the other additives further comprise liquid ceramics accounting for 0.3-0.5% of the aqueous woodenware coating by mass.

5. The aqueous woodenware coating according to claim 4, wherein the other additives further comprise a coupling agent accounting for 0.5-0.1% of the mass of the aqueous woodenware coating.

6. The waterborne wood coating according to claim 1, wherein the mass fraction of the magnesium silicate lithium slurry is 10%.

7. The waterborne wood coating according to claim 1, wherein the film forming agent is selected from the group consisting of dipropylene glycol monomethyl ether, dipropylene glycol monobutyl ether, propylene glycol butyl ether, diisobutyl dicarboxylate, diethylene glycol butyl ether, diethylene glycol ethyl ether, dipropylene glycol dimethyl ether, and alcohol ester 12.

8. The preparation method of the water-based wood coating of any one of claims 1 to 7, which is characterized by comprising the following steps:

9. The method for preparing the aqueous woodenware coating according to claim 8, wherein the step S3 is as follows: and adding a delustering agent into the second mixed component, uniformly mixing at the rotating speed of 1000-1200 rpm, and then adding the wax emulsion, deionized water and the magnesium silicate lithium slurry.

10. The use method of the water-based wood coating according to any one of claims 1 to 7, wherein the water-based wood coating is sprayed by a high-pressure mixed gas spraying method, and after the spraying is finished, the water-based wood coating is dried at a temperature of 50 +/-2 ℃ and a humidity of not higher than 20%.