阅读说明：本技术 一种高效能柔性腻子膏及其制备方法 (High-efficiency flexible putty paste and preparation method thereof ) 是由 郭新明 付绍祥 林昌庆 于 2021-09-26 设计创作，主要内容包括：本发明涉及腻子膏技术领域,尤其涉及一种高效能柔性腻子膏及其制备方法。腻子膏包括：去离子水、纯丙烯乳液份、羟乙基纤维素醚、分散剂、润湿剂、改性硅酮类消泡剂、成膜助剂、防冻剂、钛白粉、重钙、有机复合膨润土、石英砂、改性硅酮类抗碱增强剂、改性硅烷偶联剂、杀菌剂、防霉剂。本发明由于在配方中添加改性硅酮类消泡剂、改性硅酮类抗碱增强剂、改性硅烷偶联剂,使所得到的柔性腻子膏具有更高的透水性,可以降低人工成本,会被更广泛的使用。(The invention relates to the technical field of putty paste, in particular to high-efficiency flexible putty paste and a preparation method thereof. The putty paste comprises: deionized water, pure propylene emulsion, hydroxyethyl cellulose ether, a dispersing agent, a wetting agent, a modified silicone defoamer, a film forming aid, an antifreezing agent, titanium dioxide, heavy calcium carbonate, organic composite bentonite, quartz sand, a modified silicone alkali-resistant reinforcing agent, a modified silane coupling agent, a bactericide and a mildew preventive. According to the invention, as the modified silicone defoaming agent, the modified silicone alkali-resistant reinforcing agent and the modified silane coupling agent are added in the formula, the obtained flexible putty paste has higher water permeability, can reduce the labor cost and can be widely used.)

1. The high-efficiency flexible putty paste is characterized by comprising the following components in parts by weight: 2-3 parts of deionized water, 33-37 parts of pure propylene emulsion, 0.2-0.3 part of hydroxyethyl cellulose ether, 0.5-0.8 part of dispersing agent, 0.1-0.3 part of wetting agent, 0.2-0.3 part of modified silicone defoamer, 2-2.5 parts of film-forming assistant, 0.8-1.0 part of antifreeze agent, 0.5-1 part of titanium pigment, 25-30 parts of heavy calcium carbonate, 0.5-1 part of organic composite bentonite, 25-28 parts of quartz sand, 0.3-0.5 part of modified silicone alkali-resistant reinforcing agent, 0.3-0.5 part of modified silane coupling agent, 0.2-0.5 part of bactericide and 0.2-0.5 part of mildew preventive.

2. The method for preparing high performance flexible putty paste as recited in claim 1, characterized in that it comprises the following steps carried out in sequence:

s1 includes: adding hydroxyethyl cellulose ether into a mixed solution of pure propylene emulsion and deionized water, stirring for 3 minutes, then sequentially adding a dispersing agent, a wetting agent, a defoaming agent, a film forming aid and an antifreezing agent, and dispersing for 5-8 minutes at a speed of 500-800 rpm;

s2 includes: sequentially adding titanium dioxide, triple superphosphate and bentonite, and dispersing for 8-10 minutes at the speed of 1200-1400 rpm; and adding quartz sand, stirring for 3 minutes, sequentially adding the high-molecular modified silicone alkali-resistant reinforcing agent and the high-molecular modified silane coupling agent, stirring for 3 minutes, slowly adding the bactericide and the mildew preventive, and dispersing for 8-10 minutes at the speed of 1200-1400 revolutions per minute.

3. The method for preparing high performance flexible putty paste as claimed in claim 2, wherein the pure acrylic emulsion is a modified chlorinated polypropylene emulsion obtained by using acrylic esters as main monomers, using methacrylic acid as functional monomers, using functional organic acid to initiate graft copolymerization in aromatic hydrocarbon-free chlorinated polypropylene solution via free radicals, neutralizing with organic amine, removing solvent, and performing phase inversion emulsification, and then using hydroxymethyl acrylamide to participate in copolymerization reaction to form a cross-linked network structure by using self-crosslinking technology to obtain the pure acrylic emulsion.

4. The method for preparing high performance flexible putty paste as recited in claim 2 wherein the modified silane coupling agent is prepared by the steps of: and (3) dripping epoxy silane into primary amino silane at the temperature of 60-80 ℃, and carrying out heat preservation reaction for 1.5-2.5 hours at the temperature of 60-80 ℃ to obtain the modified silane coupling agent.

5. The method for preparing high performance flexible putty paste as claimed in claim 2, wherein the preparation of the modified silicone alkali-resistant reinforcing agent comprises the following steps: n-aminoethyl-3-aminopropylmethyldimethoxysilane (KH-602) is used as a coupling agent, polyether modified silicone oil and nano-silicon are added for graft copolymerization, and the modified silicone alkali-resistant reinforcing agent is prepared by continuously and physically blending with dioctyl phthalate and tributyl phosphate.

Technical Field

The invention relates to the technical field of putty paste, in particular to high-efficiency flexible putty paste and a preparation method thereof.

Background

With the gradual improvement of the national living standard, the consumption of people is gradually upgraded, and the requirement on the quality of the coating products of the inner and outer walls of the building is higher and higher; in order to save labor cost, more consumers need to paint the putty layer to achieve the effects and performances of the putty layer, the primer layer and the separation seam, the high-efficiency flexible putty paste is more and more widely painted, and the performance requirements of the consumers on the putty layer are higher and higher.

The flexible putty is prepared from high-quality cement, filler, synthetic polymer, selected additives and the like, and is divided into common exterior wall putty, flexible anti-cracking putty, flexible exterior wall putty and waterproof exterior wall putty according to the difference of flexibility and waterproof performance of the putty. When in use, 30 percent of water is added and stirred evenly. The composite material can be normally constructed in the sunny weather, and has the advantages of high bonding strength, flat and smooth surface, water resistance, moisture resistance and the like.

The putty layer is usually reworked due to various reasons in the coating process, and the repainting performance of the putty layer can be related; the conventional flexible putty paste does not have a sealing function, the salt-tolerant alkali resistance and the water permeability of the conventional flexible putty paste cannot meet the environmental requirements, the conventional flexible putty paste also does not have good weather resistance, and the artificial aging resistance such as color retention and the like cannot meet the environmental requirements.

The patent with publication number CN201010546313.9 discloses a neutral water-resistant putty paste with flexibility and a preparation method thereof, wherein the putty paste prepared from non-elastic acrylic emulsion, film forming auxiliary agent, hydroxypropyl methyl cellulose, sodium bentonite and ground calcium carbonate has high bonding strength and good flexibility and water resistance.

Disclosure of Invention

Technical problem to be solved

In view of the defects and shortcomings of the prior art, the invention provides the high-efficiency flexible putty paste, and the modified silicone defoamer, the modified silicone alkali-resistant reinforcing agent and the modified silane coupling agent are added into the formula, so that the obtained flexible putty paste has higher water permeability, can reduce the labor cost, and can be widely used.

Correspondingly, the invention also provides a preparation method of the high-efficiency flexible putty paste.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

in a first aspect, an embodiment of the present invention provides a high performance flexible putty paste, which comprises the following components in parts by weight: the paint comprises the following components in parts by weight: 2-3 parts of deionized water, 33-37 parts of pure propylene emulsion, 0.2-0.3 part of hydroxyethyl cellulose ether, 0.5-0.8 part of dispersing agent, 0.1-0.3 part of wetting agent, 0.2-0.3 part of modified silicone defoamer, 2-2.5 parts of film-forming assistant, 0.8-1.0 part of antifreeze agent, 0.5-1 part of titanium pigment, 25-30 parts of heavy calcium carbonate, 0.5-1 part of organic composite bentonite, 25-28 parts of quartz sand, 0.3-0.5 part of modified silicone alkali-resistant reinforcing agent, 0.3-0.5 part of modified silane coupling agent, 0.2-0.5 part of bactericide and 0.2-0.5 part of mildew preventive.

The invention enables the obtained flexible putty paste with high college performance to have better water permeability through the combination of the formula.

In a second aspect, the invention also provides a preparation method of the high-efficiency flexible putty paste, which comprises the following steps in sequence:

s1 includes: adding hydroxyethyl cellulose ether into a mixed solution of pure propylene emulsion and deionized water, stirring for 3 minutes, then sequentially adding a dispersing agent, a wetting agent, a defoaming agent, a film forming aid and an antifreezing agent, and dispersing for 5-8 minutes at a speed of 500-800 rpm;

s2 includes: sequentially adding titanium dioxide, triple superphosphate and bentonite, and dispersing for 8-10 minutes at the speed of 1200-1400 rpm; and adding quartz sand, stirring for 3 minutes, sequentially adding the high-molecular modified silicone alkali-resistant reinforcing agent and the high-molecular modified silane coupling agent, stirring for 3 minutes, slowly adding the bactericide and the mildew preventive, and dispersing for 8-10 minutes at the speed of 1200-1400 revolutions per minute.

After pure acrylic emulsion and deionized water are added, hydroxyethyl cellulose ether is slowly added in a stirring state, the dispersion is carried out for 3 minutes at the medium speed of 500 r/min (ensuring that the cellulose ether is fully dissolved), then dispersing agent (dispersing pigment and filler particles into primary particles through shearing force and stably dispersed in a system for a long time through electrostatic repulsion and steric hindrance effect), wetting agent (reducing the surface tension of the wetted substance to fully wet the pigment and filler particles and keep the dispersion stable state), defoaming agent (eliminating bubbles caused by emulsion and the like and simultaneously eliminating bubbles caused in the production process), film-forming auxiliary agent (forming a uniform and continuous coating film on the coating), antifreezing agent (improving the frost resistance and low-temperature stability of the product), titanium pigment is dispersed for 5 to 8 minutes at the medium speed of 500 r/min, titanium pigment is sequentially added, The coarse whiting and the bentonite (the fineness can be dispersed in the shortest time according to the sequence) are dispersed for 8-10 minutes at the speed of 1400 revolutions per minute of 1200-1400 revolutions per minute, the fineness of the product is ensured to be qualified, the quartz sand is added and stirred for 3 minutes (the quartz sand is ensured to be uniformly mixed), the water-based reinforcing agent and the coupling agent are sequentially added (two functional additives are added at the stage, the effects of improving the saltpetering resistance alkalinity, the water permeability and the bonding strength are optimal), the bactericide and the mildew preventive are added after stirring for 3 minutes (the bactericide or the mildew preventive is added under the condition that the emulsion is not uniformly dispersed so as to cause local demulsification), and finally, the coarse whiting and the bentonite are dispersed for 8-10 minutes at the speed of 1400 revolutions per minute of 1200-revolutions per minute.

Optionally, the pure propylene emulsion is a modified chlorinated polypropylene emulsion obtained by using acrylic esters as a main monomer, using methacrylic acid as a functional monomer, using functional organic acid to initiate graft copolymerization in an aromatic hydrocarbon-free chlorinated polypropylene solution through free radicals, neutralizing with organic amine, removing a solvent, performing phase inversion emulsification, and then using hydroxymethyl acrylamide to participate in copolymerization reaction by using a self-crosslinking technology to form a crosslinked network structure, thereby obtaining the pure propylene emulsion. The modified chlorinated polypropylene emulsion prepared by the method has stronger bonding property, and can be used for improving the water permeability of the putty paste in the preparation process of the putty paste by matching with the modified silicone defoamer, the modified silicone alkali-resistant reinforcing agent and the modified silane coupling agent obtained by the method.

Alternatively, the preparation of the modified silane coupling agent comprises the steps of: and (3) dripping epoxy silane into primary amino silane at the temperature of 60-80 ℃, and carrying out heat preservation reaction for 1.5-2.5 hours at the temperature of 60-80 ℃ to obtain the modified silane coupling agent. When the modified silane coupling agent prepared by the method is applied to the formula, the water permeability of the putty paste can be improved; the modified chlorinated polypropylene emulsion, the modified silicone alkali-resistant reinforcing agent and the modified silane coupling agent are compatible, and when the modified chlorinated polypropylene emulsion, the modified silicone alkali-resistant reinforcing agent and the modified silane coupling agent are applied to the preparation process of the putty paste, the water permeability of the putty paste can be improved.

Optionally, the preparation of the modified silicone alkali-resistant reinforcing agent comprises the following steps: n-aminoethyl-3-aminopropylmethyldimethoxysilane (KH-602) is used as a coupling agent, polyether modified silicone oil and nano-silicon are added for graft copolymerization, and the modified silicone alkali-resistant reinforcing agent is prepared by continuously and physically blending with dioctyl phthalate and tributyl phosphate (according to the mass ratio of 100: 3).

(III) advantageous effects

The invention has the beneficial effects that:

the flexible putty paste has excellent bonding strength, sealing property, weather resistance, flexibility and water permeability, and has higher water permeability due to the addition of the modified silicone defoamer, the modified silicone alkali-resistant reinforcing agent and the modified silane coupling agent in the formula. The water permeability can reach less than 0.6 ml, the artificial aging resistance can reach 600 hours, no bubble, no peeling, no crack and no abnormity of salt-forming alkalinity can reach 72 hours, and the primer is suitable for the effect coating of adding the parting seam primer to the putty layer with high requirements on sealing property and weather resistance;

compared with the construction effects and performances of two traditional flexible putty pastes, one closed primer and one parting line paint, the two traditional flexible putty pastes have the same effect and performance in construction, are smooth in surface and have the function of coating parting line colors, can greatly shorten the construction period, save energy and reduce emission, and can be used for inner walls and outer wall facades of buildings.

Detailed Description

For a better understanding of the present invention, reference will now be made in detail to the present invention by way of specific embodiments thereof. In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below. While the following shows exemplary embodiments of the invention, it should be understood that the invention may be embodied in various 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, and will fully convey the scope of the invention to those skilled in the art.

Example 1

A high-performance flexible putty paste comprises the following components in parts by weight: 2 parts of deionized water, 37 parts of pure propylene emulsion, 0.3 part of hydroxyethyl cellulose ether, 0.5 part of anionic polymer carboxylate dispersant, 0.3 part of nonionic alcohol wetting agent, 0.2 part of modified silicone defoamer, 2 parts of dodecanol ester film-forming additive, 0.8 part of propylene glycol antifreeze agent, 0.5 part of titanium dioxide, 27 parts of heavy calcium carbonate, 0.7 part of organic composite bentonite, 27 parts of quartz sand, 0.3 part of modified silicone alkali-resistant reinforcing agent, 0.5 part of modified silane coupling agent, 0.3 part of 1, 2-benzisothiazolinone-3-one and 2-methyl-4-isothiazolinone-3-one compound bactericide, and 0.5 part of zinc pyrithione and 2-octyl-3 (2H) -isothiazolinone compound mildew preventive.

The preparation method comprises the following steps:

preparation of S1 pure propylene emulsion: the pure propylene emulsion is a modified chlorinated polypropylene emulsion which is obtained by taking acrylic esters as a main monomer, taking methacrylic acid as a functional monomer, using functional organic acid to initiate graft copolymerization in an aromatic hydrocarbon-free chlorinated polypropylene solution through free radicals, neutralizing with organic amine, removing a solvent, performing phase inversion emulsification, and then using hydroxymethyl acrylamide to participate in copolymerization reaction by adopting a self-crosslinking technology to form a crosslinked network structure to obtain the pure propylene emulsion;

preparation of S2 modified silane coupling agent: dripping epoxy silane into primary amino silane at the temperature of 80 ℃, and carrying out heat preservation reaction for 2.5 hours at the temperature of 60 ℃ to obtain a modified silane coupling agent;

preparation of S3 modified silicone alkali-resistant reinforcing agent: n-aminoethyl-3-aminopropylmethyldimethoxysilane (KH-602) is used as a coupling agent, polyether modified silicone oil and nano-silicon are added for graft copolymerization, and then the modified silicone alkali-resistant reinforcing agent is prepared by physical blending with dioctyl phthalate and tributyl phosphate (according to the mass ratio of 100: 3);

s4, adding hydroxyethyl cellulose ether into the mixed solution of the pure propylene emulsion and the deionized water, stirring for 3 minutes, then sequentially adding a dispersing agent, a wetting agent, a modified silicone defoamer, a film forming aid and an antifreezing agent, and dispersing for 8 minutes at the speed of 500 revolutions per minute;

s5, sequentially adding titanium dioxide, coarse whiting and bentonite, and dispersing for 10 minutes at the speed of 1400 revolutions per minute; adding quartz sand, stirring for 3 min, sequentially adding the macromolecular modified silicone alkali-resistant reinforcing agent and the macromolecular modified silane coupling agent, stirring for 3 min, slowly adding the bactericide and the mildew preventive, and dispersing at the speed of 1400 rpm for 10 min.

Example 2

A high-performance flexible putty paste comprises the following components in parts by weight: 3 parts of deionized water, 35 parts of pure propylene emulsion, 0.3 part of hydroxyethyl cellulose ether, 0.5 part of anionic polymer carboxylate dispersant, 0.3 part of nonionic alcohol wetting agent, 0.2 part of modified silicone defoamer, 2 parts of dodecanol ester film-forming assistant, 0.8 part of propylene glycol antifreeze agent, 0.5 part of titanium dioxide, 27 parts of heavy calcium carbonate, 0.7 part of organic composite bentonite, 28 parts of quartz sand, 0.3 part of modified silicone alkali-resistant reinforcing agent, 0.5 part of modified silane coupling agent, 0.3 part of 1, 2-benzisothiazolinone-3-one and 2-methyl-4-isothiazolinone-3-one compound bactericide, and 0.5 part of zinc pyrithione and 2-octyl-3 (2H) -isothiazolinone compound mildew preventive.

The preparation method comprises the following steps:

preparation of S1 pure propylene emulsion: the pure propylene emulsion is a modified chlorinated polypropylene emulsion which is obtained by taking acrylic esters as a main monomer, taking methacrylic acid as a functional monomer, using functional organic acid to initiate graft copolymerization in an aromatic hydrocarbon-free chlorinated polypropylene solution through free radicals, neutralizing with organic amine, removing a solvent, performing phase inversion emulsification, and then using hydroxymethyl acrylamide to participate in copolymerization reaction by adopting a self-crosslinking technology to form a crosslinked network structure to obtain the pure propylene emulsion;

preparation of S2 modified silane coupling agent: dripping epoxy silane into primary amino silane at the temperature of 60 ℃, and carrying out heat preservation reaction for 2 hours at the temperature of 70 ℃ to obtain a modified silane coupling agent;

preparation of S3 modified silicone alkali-resistant reinforcing agent: n-aminoethyl-3-aminopropylmethyldimethoxysilane (KH-602) is used as a coupling agent, polyether modified silicone oil and nano-silicon are added for graft copolymerization, and then the modified silicone alkali-resistant reinforcing agent is prepared by physical blending with dioctyl phthalate and tributyl phosphate (according to the mass ratio of 100: 3);

s4, adding hydroxyethyl cellulose ether into the mixed solution of the pure propylene emulsion and the deionized water, stirring for 3 minutes, then sequentially adding a dispersing agent, a wetting agent, a modified silicone defoamer, a film forming aid and an antifreezing agent, and dispersing for 5 minutes at the speed of 800 r/min;

s5, sequentially adding titanium dioxide, triple superphosphate and bentonite, and dispersing for 8 minutes at the speed of 1200 rpm; adding quartz sand, stirring for 3 minutes, sequentially adding the macromolecular modified silicone alkali-resistant reinforcing agent and the macromolecular modified silane coupling agent, stirring for 3 minutes, slowly adding the bactericide and the mildew preventive, and dispersing for 9 minutes at the speed of 1200 revolutions per minute.

Example 3

A high-performance flexible putty paste comprises the following components in parts by weight: 3 parts of deionized water, 33 parts of pure propylene emulsion, 0.3 part of hydroxyethyl cellulose ether, 0.5 part of anionic polymer carboxylate dispersant, 0.3 part of nonionic alcohol wetting agent, 0.2 part of modified silicone defoamer, 2 parts of dodecanol ester film-forming assistant, 0.8 part of propylene glycol antifreeze agent, 0.5 part of titanium dioxide, 28 parts of heavy calcium carbonate, 0.7 part of organic composite bentonite, 28 parts of quartz sand, 0.3 part of modified silicone alkali-resistant reinforcing agent, 0.5 part of modified silane coupling agent, 0.3 part of 1, 2-benzisothiazolinone-3-one and 2-methyl-4-isothiazolinone-3-one compound bactericide, and 0.5 part of zinc pyrithione and 2-octyl-3 (2H) -isothiazolinone compound mildew preventive.

The preparation method comprises the following steps:

preparation of S1 pure propylene emulsion: the pure propylene emulsion is a modified chlorinated polypropylene emulsion which is obtained by taking acrylic esters as a main monomer, taking methacrylic acid as a functional monomer, using functional organic acid to initiate graft copolymerization in an aromatic hydrocarbon-free chlorinated polypropylene solution through free radicals, neutralizing with organic amine, removing a solvent, performing phase inversion emulsification, and then using hydroxymethyl acrylamide to participate in copolymerization reaction by adopting a self-crosslinking technology to form a crosslinked network structure to obtain the pure propylene emulsion;

preparation of S2 modified silane coupling agent: dripping epoxy silane into primary amino silane at 70 ℃, and carrying out heat preservation reaction for 1.5 hours at 80 ℃ to obtain a modified silane coupling agent;

preparation of S3 modified silicone alkali-resistant reinforcing agent: n-aminoethyl-3-aminopropylmethyldimethoxysilane (KH-602) is used as a coupling agent, polyether modified silicone oil and nano-silicon are added for graft copolymerization, and then the modified silicone alkali-resistant reinforcing agent is prepared by physical blending with dioctyl phthalate and tributyl phosphate (according to the mass ratio of 100: 3);

s4, adding hydroxyethyl cellulose ether into the mixed solution of the pure propylene emulsion and the deionized water, stirring for 3 minutes, then sequentially adding a dispersing agent, a wetting agent, a modified silicone defoamer, a film forming aid and an antifreezing agent, and dispersing for 7 minutes at the speed of 700 revolutions per minute;

dispersing for 9 minutes; adding quartz sand, stirring for 3 min, sequentially adding the macromolecular modified silicone alkali-resistant reinforcing agent and the macromolecular modified silane coupling agent, stirring for 3 min, slowly adding the bactericide and the mildew preventive, and dispersing for 8 min at the speed of 1300 r/min.

S5, sequentially adding titanium dioxide, triple superphosphate and bentonite, and dispersing for 9 minutes at the speed of 1300 rpm; adding quartz sand, stirring for 3 min, sequentially adding the macromolecular modified silicone alkali-resistant reinforcing agent and the macromolecular modified silane coupling agent, stirring for 3 min, slowly adding the bactericide and the mildew preventive, and dispersing for 8 min at the speed of 1300 r/min.

Comparative example 1

The other points are different from example 1 in that: the modified silicone defoamer and the macromolecule modified silicone alkali-resistant reinforcing agent are replaced by common ethylene glycol siloxane defoamer and N-aminoethyl-3-aminopropyl methyl dimethoxy silicone alkali-resistant reinforcing agent.

Comparative example 2

The other points are different from example 1 in that: the used high molecular modified silane coupling agent is replaced by common glycol siloxane modified silane coupling agent.

Comparative example 3

The other points are different from example 1 in that: the used modified silicone defoamer, high-molecular modified silicone alkali-resistant reinforcing agent and high-molecular modified silane coupling agent are replaced by common ethylene glycol siloxane defoamer, N-aminoethyl-3-aminopropyl methyl dimethoxy silane silicone alkali-resistant reinforcing agent and ethylene glycol siloxane modified silane coupling agent.

The high performance flexible putty pastes obtained in examples 1-3 of the present invention and comparative examples 1-3 were tested to obtain the data shown in tables 1-3.

Tables 1 and 2 show the technical performance indexes and experimental data of the high-performance flexible putty paste:

TABLE 1

TABLE 2

As is apparent from table 1, each technical performance of examples 1 to 3 of the high-performance flexible putty paste provided by the invention reaches or is higher than the technical index in the R-type standard of JG/T157-2009 putty for exterior walls of buildings; from table 2, it is apparent that the technical properties of the high-performance flexible putty paste provided by the invention in examples 1-3 except water permeability (water permeability can not pass the standard) all reach the technical indexes in the exterior wall film forming type II standard of JG/T210-2018 primer for building interior and exterior walls, and the artificial aging resistance can reach the technical indexes in the top grade standard of GB/T9755 synthetic resin emulsion exterior wall paint, wherein the artificial aging resistance can not bubble, not peel off and not crack after 600h, the pulverization level is 1 level after 600h, and the color change level is 1 level.

Table 3 presents environmental experimental data:

as is apparent from table 3, the VOC (volatile organic compound), formaldehyde content, total benzene content, total lead content, and soluble heavy metals contained in examples 1 to 3 of the present invention are all superior to the technical indexes in the standard GB18582-2020 "limit of harmful substances in wall coatings for buildings", and meet the requirements of environmental protection and health, and are safe and reliable to use.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.