High-bonding-strength water-based heat insulation intermediate paint and preparation method thereof

Abstract

The invention relates to the technical field of heat insulation coatings, in particular to a high-bonding-strength water-based heat insulation intermediate paint and a preparation method thereof. Comprising the following components in parts by weight: 1-3 parts of a coalescing agent, 1-3 parts of a dispersing agent, 1-3 parts of a defoaming agent, 0.1-1 part of a neutralizing agent, 0.1-1 part of a wetting agent, 0.1-1 part of a flatting agent, 0.1-1 part of a rheological agent, 50-55 parts of acrylate polymer mixed emulsion, 10-15 parts of vacuum ceramic microbeads, 10-15 parts of hollow glass microbeads, 0.1-0.5 part of a coupling agent and the like. The large-particle-size hollow glass beads and the small-particle-size vacuum ceramic beads are matched in a paint film in an echelon manner, and are matched with a compact-surface-layer and flexible-inner-layer structure formed by the acrylate polymer emulsion, so that a three-dimensional close packing structure is formed, a continuous heat insulation layer is formed, heat conduction can be effectively blocked, and the bonding strength of the paint is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat-insulating and heat-preserving coatings, and more specifically, to a water-based heat-insulating and heat-preserving intermediate paint with high bonding strength and a preparation method thereof. Background Art

[0002] In the coating system, as an important part of the coating system, the main function of the intermediate paint is to fill the uneven parts of the substrate surface, enhancing the protection performance and adhesion of the coating. However, with the increasing demand for heat-insulating and heat-preserving performance, the functions of the intermediate paint are also constantly expanding. Traditional heat-insulating and heat-preserving materials such as polyurethane foam and rock wool board have certain heat-insulating and heat-preserving effects, but there are problems such as complex construction processes, large material thickness, and easy formation of thermal bridges at the joints. These limitations have made the market's demand for new heat-insulating and heat-preserving materials increasingly urgent.

[0003] As a new type of heat-insulating and heat-preserving material, the heat-insulating and heat-preserving intermediate paint has the advantages of heat-insulating and heat-preserving performance, convenient construction, and one-piece forming, and can effectively solve the defects of traditional heat-insulating and heat-preserving materials. It can be directly sprayed or brushed, reducing construction time and cost, without multiple processes, simplifying the construction process, and seamless construction, avoiding heat loss at the joints.

[0004] The heat-insulating and heat-preserving intermediate paint is mainly divided into three types: reflective type, radiative type, and barrier type by adding different types of functional fillers, either increasing the degree of heat radiation reflection, or increasing the emissivity of heat radiation, or slowing down heat conduction. The reflective heat-insulating and heat-preserving intermediate paint reduces the surface temperature by reflecting solar radiation; the radiative heat-insulating and heat-preserving intermediate paint reduces heat transfer by emitting heat radiation; and the barrier heat-insulating and heat-preserving intermediate paint achieves the heat-insulating effect by slowing down heat conduction.

[0005] Although various coating enterprises have conducted a large amount of research on heat-insulating and heat-preserving intermediate paints, there are still some problems at present. For example, the bonding strength of the coating is relatively low, the heat-insulating and heat-preserving effect is not ideal, and the process is complex, etc.

[0006] A Chinese invention patent with the publication number CN 117586678 A and the publication date of February 23, 2024, discloses a lightweight texture type high-efficiency heat-insulating and heat-preserving paint. It uses infrared reflective heat-insulating titanium dioxide, nuclear titanium white, and aerogel dispersion paste as the main materials for light reflection and heat insulation, making the paint have excellent light and heat reflection effects. However, the bonding strength of this paint is relatively low, only 1.02 MPa.

[0007] The Chinese invention patent with the publication number CN 118652571 A and the publication date of September 17, 2024, discloses a heat-insulating and heat-preserving coating and its preparation method. It includes modified silica microspheres, polymer microspheres, a dispersant, a hydrophilic acrylate, and water. The system is stable and can mitigate the temperature difference changes brought about by temperature rise. However, the coating process is cumbersome, and its thermal conductivity is 0.504 W / (m·K), resulting in an unsatisfactory heat-insulating and heat-preserving effect.

[0008] The Chinese invention patent with the publication number CN 116463003 A and the publication date of July 21, 2023, discloses a vacuum ceramic microsphere heat-insulating and heat-preserving coating and its preparation method. It combines vacuum ceramic microspheres, white carbon black, cenospheres, titanium dioxide, and modified bentonite, etc., such that the resulting coating has a low thermal conductivity, obtaining excellent heat-insulating and heat-preserving performance. Moreover, its surface has a high flatness after coating, is easy to construct, and is safe and reliable. However, the thermal conductivity of this coating is slightly high, being 0.06 W / (m·K), and the bentonite modification process is relatively complex.

[0009] Therefore, how to provide an intermediate paint with high bond strength, excellent heat-insulating and heat-preserving performance, and a simple production process is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0010] To solve the problems in the above background technology, a high-bond-strength water-based heat-insulating and heat-preserving intermediate paint provided by the present invention, in parts by weight, includes: Film-forming assistant: 1 - 3 parts Dispersant: 1 - 3 parts Defoamer: 1 - 3 parts Neutralizing agent: 0.1 - 1 part Wetting agent: 0.1 - 1 part Leveling agent: 0.1 - 1 part Rheology aid: 0.1 - 1 part Acrylate polymer mixed emulsion: 50 - 55 parts Vacuum ceramic microspheres: 10 - 15 parts Hollow glass microspheres: 10 - 15 parts Coupling agent: 0.1 - 0.5 part Deionized water: 10 - 20 parts; Among them, the acrylate polymer mixed emulsion is a mixture of a styrene-acrylate copolymer emulsion and an acrylic acid copolymer emulsion.

[0011] In one embodiment, in the acrylate polymer mixed emulsion, the mass ratio of the styrene-acrylate copolymer emulsion to the acrylic acid copolymer emulsion is 1 - 3:7 - 9.

[0012] In one embodiment, the styrene-acrylic copolymer emulsion is one or more of 7199, SD-800, BLJ-8816 and IRW-E037; the acrylic copolymer emulsion is Archsol 8218.

[0013] In one embodiment, the film-forming aid is a composition of one or more of ethylene glycol, diethylene glycol monobutyl ether and lauryl alcohol phthalate.

[0014] In one embodiment, the dispersant is a composition of one or more of maleic anhydride copolymer dispersants, acrylic acid-methyl acrylate copolymer dispersants and acrylic surfactants.

[0015] In one embodiment, the defoamer is a composition of one or two of silicone defoamers and polyether silicone copolymer defoamers; the neutralizing agent is 25 wt% - 28 wt% ammonia water.

[0016] In one embodiment, the wetting agent is a composition of one or two of nonionic surfactants and polyether-modified silicone wetting agents.

[0017] In one embodiment, the leveling agent is a composition of one or more of silicone surface active leveling aids, polyether-modified silicone leveling aids and ionic polyacrylate leveling aids; the rheology modifier is a composition of one or two of organically modified montmorillonite clay rheology modifiers, polyether polyurethane rheology modifiers and waterborne acrylic associative alkali-swellable thickeners; the coupling agent is a composition of one or two of organosilicon oligomers KH-560 and A-187.

[0018] In one embodiment, the vacuum ceramic microspheres are soda lime borosilicate glass with a D50 of 2 - 4 μm; the hollow glass microspheres are sodium calcium borosilicate glass with a D50 of 50 - 60 μm; where the D50 is the median particle diameter.

[0019] The present invention also provides a preparation method of the high bond strength waterborne heat-insulating and heat-preserving intermediate paint as described above, and the steps are as follows: S1. Add deionized water, film-forming aid, dispersant, defoamer, neutralizing agent and wetting agent into a container in sequence, adjust the rotation speed to 300 - 600 r / min, and disperse at high speed for 5 - 10 min; S2. Add the rheology modifier into the mixed clear liquid, adjust the rotation speed to 500 - 1000 r / min, and disperse at high speed for 10 - 15 min; S3. Add the acrylate polymer emulsion, adjust the rotation speed to 500 - 800 r / min, and disperse at high speed for 5 - 10 min; S4. Add vacuum ceramic microspheres and hollow glass microspheres, adjust the rotation speed to 600 - 800 r / min, and disperse at high speed for 10 - 20 min; S5. Add a leveling agent and a coupling agent, adjust the rotation speed to 400 - 600 r / min, and disperse at high speed for 5 - 10 min; S6. Filter and package to obtain the finished product.

[0020] Compared with the prior art, the water - borne heat - insulating and heat - preserving intermediate paint provided by the present invention forms a unique "dense surface - flexible inner layer" gradient structure during film formation by innovatively designing the molecular ratio of hard monomers and soft monomers in the acrylate polymer emulsion. The hard monomers preferentially migrate to the substrate interface and are oriented, forming strong chemical adsorption with the substrate through intermolecular hydrogen bonds, and constructing a high - modulus dense protective layer on the surface layer; at the same time, the soft monomers fill the internal pores through the chain - segment entanglement effect, forming an elastic network that can absorb stress deformation. This synergistic effect significantly improves the adhesion of the paint film. Compared with the use of traditional single - component emulsions, the adhesion is greatly improved. In addition, a combination of large - particle - size hollow glass microspheres and small - particle - size vacuum ceramic microspheres is adopted. The large - particle - size hollow glass microspheres and small - particle - size vacuum ceramic microspheres are arranged in a gradient in the paint film, matching the "dense surface - flexible inner layer" structure formed by the acrylate polymer emulsion to form a three - dimensional close - packing structure, forming a continuous "heat - insulation" layer, which can effectively block heat conduction and enhance the bonding strength of the coating. Experiments show that through the synergistic effect of the macroscopic barrier effect of large - particle - size microspheres, the microscopic interface scattering effect of small - particle - size microspheres, and the gradient structure formed by the acrylate polymer emulsion, the thermal conductivity of the coating is significantly decreased. Compared with traditional coatings that require multiple layers of construction (traditional coatings need to be coated 5 - 6 times to reach a total thickness of 1 mm), this system can reach a thickness of 1 mm in a single layer, while ensuring the bonding strength and heat - insulation and heat - preservation performance of the coating.

[0021] The water - borne heat - insulating and heat - preserving intermediate paint disclosed by the present invention significantly improves the adhesion and heat - insulation and heat - preservation ability of the intermediate paint through the interfacial action regulation of hard monomers and soft monomers at the molecular level in the acrylate polymer emulsion and the formation of a near - closest - packing structure after the combination of large - particle - size hollow glass microspheres and small - particle - size vacuum ceramic microspheres. In addition, the production process of the present invention is simple, environmentally friendly, and applicable to scenarios such as spraying, scraping, and roll - coating, and the construction is convenient. Detailed implementation manners

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] The present invention also provides the following examples and comparative examples: Example 1 A waterborne heat-insulating and heat-preserving intermediate paint with high bonding strength, by weight parts, includes: 1.8 parts of film-forming auxiliary agent, 1.6 parts of dispersant, 1.6 parts of defoaming agent, 0.2 parts of neutralizing agent, 0.3 parts of wetting agent, 0.2 parts of leveling agent, 0.3 parts of rheology aid, 52 parts of acrylate polymer mixed emulsion, 13.4 parts of vacuum ceramic microspheres, 13.4 parts of hollow glass microspheres, 0.2 parts of coupling agent, and 15.2 parts of deionized water; Among them, in the acrylate polymer mixed emulsion, the mass ratio of styrene-acrylic copolymer emulsion to acrylic copolymer emulsion is 3:7; The film-forming auxiliary agent of Example 1 is ethylene glycol, the dispersant is DISPER BYK-19, the defoaming agent is silicone defoaming agent TEGO Foamex 810, the neutralizing agent is 27wt% ammonia water, the wetting agent is non-ionic surfactant WA-6917, the leveling agent is polyether-modified silicone oxygen alkane leveling aid AMORSO-137, the rheology aid is organically modified montmorillonite clay rheology aid DE, the styrene-acrylic copolymer emulsion is 7199, the acrylic copolymer emulsion is Archsol 8218, the vacuum ceramic microspheres are lime-soda borosilicate glass, D50 = 3μm, the hollow glass microspheres are sodium-calcium borosilicate glass, D50 = 55μm, and the coupling agent is organosilicon oligomer KH-560.

[0024] The preparation method of the waterborne heat-insulating and heat-preserving intermediate paint with high bonding strength provided by Example 1 is as follows: S1. Add deionized water, film-forming auxiliary agent, dispersant, defoaming agent, neutralizing agent, and wetting agent into a container in sequence, adjust the rotation speed to 300 - 600 r / min, and disperse at high speed for 5 - 10 min; S2. Add rheology aid into the mixed clear liquid, adjust the rotation speed to 500 - 1000 r / min, and disperse at high speed for 10 - 15 min; S3. Add acrylate polymer emulsion, adjust the rotation speed to 500 - 800 r / min, and disperse at high speed for 5 - 10 min; S4. Add vacuum ceramic microspheres and hollow glass microspheres, adjust the rotation speed to 600 - 800 r / min, and disperse at high speed for 10 - 20 min; S5. Add leveling agent and coupling agent, adjust the rotation speed to 400 - 600 r / min, and disperse at high speed for 5 - 10 min; S6. Filter and package to obtain the finished product.

[0025] Example 2 A water-based heat-insulating and heat-preserving intermediate paint with high adhesion strength, by weight, includes: 1 part of film-forming aid, 1 part of dispersant, 1 part of defoamer, 0.1 part of neutralizer, 0.1 part of wetting agent, 0.1 part of leveling agent, 0.1 part of rheological aid, 50 parts of acrylate polymer mixed emulsion, 10 parts of vacuum ceramic microspheres, 10 parts of hollow glass microspheres, 0.1 part of coupling agent, and 10 parts of deionized water; Among them, in the acrylate polymer mixed emulsion, the mass ratio of styrene-acrylate copolymer emulsion to acrylate copolymer emulsion is 3:7; The film-forming aid in Example 2 is diethylene glycol butyl ether, the dispersant is TSF-1901, the defoamer is polyether silicone copolymer defoamer TEGO Airex 901W, the neutralizer is 27wt% ammonia water, the wetting agent is polyether-modified silicone wetting agent BYK-345, the leveling agent is acrylate-modified silicone leveling aid Greesol L61, the rheological aid is polyether polyurethane rheological aid DVK-299, the styrene-acrylate copolymer emulsion is 7199, the acrylate copolymer emulsion is Archsol 8218, the vacuum ceramic microspheres are lime borosilicate glass, D50 = 3μm, the hollow glass microspheres are sodium calcium borosilicate glass, D50 = 55μm, and the coupling agent is organosilicon oligomer KH-560.

[0026] The preparation steps of Example 2 are the same as those of Example 1.

[0027] Example 3 A water-based heat-insulating and heat-preserving intermediate paint with high adhesion strength, by weight, includes: 3 parts of film-forming aid, 3 parts of dispersant, 3 parts of defoamer, 1 part of neutralizer, 1 part of wetting agent, 1 part of leveling agent, 1 part of rheological aid, 55 parts of acrylate polymer mixed emulsion, 15 parts of vacuum ceramic microspheres, 15 parts of hollow glass microspheres, 0.5 part of coupling agent, and 20 parts of deionized water; Among them, in the acrylate polymer mixed emulsion, the mass ratio of styrene-acrylate copolymer emulsion to acrylate copolymer emulsion is 3:7; The film-forming aid in Example 3 is Texanol, the dispersant is TEGO Dispers 760W, the defoamer is polyether silicone copolymer defoamer TEGO Airex 901W, the neutralizer is 27 wt% ammonia water, the wetting agent is polyether-modified silicone wetting agent BYK-345, the leveling agent is acrylate-modified silicone leveling aid Greesol L61, the rheology aid is waterborne acrylic associative alkali-swellable thickener SV-125, the styrene-acrylic copolymer emulsion is 7199, the acrylic copolymer emulsion is Archsol 8218, the vacuum ceramic microspheres are lime-soda borosilicate glass, D50 = 3 μm, the hollow glass microspheres are soda-lime borosilicate glass, D50 = 55 μm, and the coupling agent is organosilicon oligomer KH-560.

[0028] The preparation steps of Example 3 are the same as those of Example 1.

[0029] Example 4 The difference between Example 4 and Example 1 is that the styrene-acrylic copolymer emulsion used is styrene-acrylic copolymer emulsion SD-800, and the mass ratio with the acrylic copolymer emulsion Archsol 8218 is 3:7, and the total weight parts are 52.

[0030] The preparation steps of Example 4 are the same as those of Example 1.

[0031] Example 5 The difference between Example 5 and Example 1 is that the styrene-acrylic copolymer emulsion used is styrene-acrylic copolymer emulsion BLJ-8816, and the mass ratio with the acrylic copolymer emulsion Archsol 8218 is 3:7, and the total weight parts are 52.

[0032] The preparation steps of Example 5 are the same as those of Example 1.

[0033] Example 6 The difference between Example 6 and Example 1 is that the styrene-acrylic copolymer emulsion used is styrene-acrylic copolymer emulsion BLJ-8816, and the mass ratio with the acrylic copolymer emulsion IRW-E037 is 3:7, and the total weight parts are 52.

[0034] The preparation steps of Example 6 are the same as those of Example 1.

[0035] Example 7 The difference between Example 7 and Example 1 is that the mass ratio of the styrene-acrylic copolymer emulsion 7199 to the acrylic copolymer emulsion IRW-E037 is 1:9, and the total weight parts are 52.

[0036] The preparation steps of Example 7 are the same as those of Example 1.

[0037] Comparative Example 1 The difference between this comparative example and Example 1 is that only acrylic copolymer emulsion Archsol 8218 is used, with a mass fraction of 52, and the other material components and preparation steps are the same as those in Example 1.

[0038] Comparative Example 2 The difference between this comparative example and Example 1 is that only styrene-acrylic copolymer emulsion 7199 is used, with a mass fraction of 52, and the other material components and preparation steps are the same as those in Example 1.

[0039] Comparative Example 3 The high-adhesion-strength waterborne heat-insulating and heat-preserving intermediate paint provided by Comparative Example 3 is different from Experimental Example 1 in that the amount of vacuum ceramic microspheres is reduced, specifically as follows: By weight, it includes: film-forming auxiliary 1.9 parts, dispersant 1.7 parts, defoamer 1.7 parts, neutralizer 0.2 parts, wetting agent 0.3 parts, leveling agent 0.2 parts, rheology aid 0.3 parts, acrylate polymer mixed emulsion 53.7 parts, vacuum ceramic microspheres 13.8 parts, hollow glass microspheres 10.4 parts, coupling agent 0.2 parts, deionized water 14.8 parts; The other material components and preparation steps are the same as those in Example 1.

[0040] Comparative Example 4 The high-adhesion-strength waterborne heat-insulating and heat-preserving intermediate paint provided by Comparative Example 4 is different from Experimental Example 1 in that the amount of vacuum ceramic microspheres is increased, specifically as follows: By weight, it includes: film-forming auxiliary 1.7 parts, dispersant 1.6 parts, defoamer 1.6 parts, neutralizer 0.2 parts, wetting agent 0.3 parts, leveling agent 0.2 parts, rheology aid 0.3 parts, acrylate polymer mixed emulsion 50.2 parts, vacuum ceramic microspheres 16.2 parts, hollow glass microspheres 12.9 parts, coupling agent 0.2 parts, deionized water 14.8 parts; The other material components and preparation steps are the same as those in Example 1.

[0041] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that the mass ratio of styrene-acrylic copolymer emulsion 7199 to acrylic copolymer emulsion IRW-E037 is 7:3, and the total weight fraction is 52.

[0042] The preparation steps of Comparative Example 5 are the same as those in Example 1.

[0043] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that the mass ratio of styrene-acrylic copolymer emulsion 7199 to acrylic copolymer emulsion IRW-E037 is 5:5, and the total weight fraction is 52.

[0044] The preparation steps of Comparative Example 6 are the same as those in Example 1.

[0045] Performance Testing According to the requirements of HG / T 5182-2017, test panels were prepared. The water-based thermal insulation coating was brushed on the treated tinplate and sandblasted steel surfaces, and cured at room temperature for one week after the surface dried. The dry film thickness was 1 mm. The test results are shown in Table 1-2 below: Table 1 Performance data of different latex compound thermal insulation coating examples

[0046] Table 2 Performance data of different latex composite thermal insulation coatings

[0047] The results of analyzing the above embodiments and comparative examples show that: Compared with Example 1, after using styrene-acrylic copolymer emulsion or acrylic copolymer emulsion alone in Comparative Examples 1-2, the bonding strength of the coating decreased, indicating that the film-forming performance and adhesion of a single emulsion were insufficient; compared with Example 1, after changing the emulsion type or adjusting the emulsion ratio in Examples 4-8, the bonding strength of the coating decreased, which may be because the selection of other emulsion types or changes in the ratio led to reduced compatibility of the components or insufficient film-forming performance, resulting in deterioration of the coating performance; Compared with Example 1, the thermal conductivity of Comparative Examples 3-4 is significantly increased, the thermal insulation temperature difference is significantly reduced, and the salt spray resistance of Comparative Example 4 is reduced, which indicates that the usage ratio of vacuum ceramic microspheres and hollow glass microspheres is unbalanced, which will destroy the coating structure, weaken the thermal insulation performance of the coating, and reduce the thermal insulation efficiency. This shows that the present invention reasonably matches vacuum ceramic microspheres and hollow glass microspheres, and the two synergistically enhance the thermal insulation effect; In addition, compared with Examples 1-3, the styrene-acrylic copolymer emulsion and acrylic copolymer emulsion of Comparative Examples 5-6 are beyond the scope of the present invention, resulting in cracking of the coating when thickly applied, which indicates that the ratio of the styrene-acrylic copolymer emulsion and acrylic copolymer emulsion of the present invention has a certain stability.

[0048] The high-bonding strength water-based thermal insulation intermediate paint provided by the present invention is optimized by compounding styrene-acrylic copolymer and acrylic copolymer emulsion, combined with the synergistic effect of vacuum ceramic microspheres and hollow glass microspheres, and exhibits excellent comprehensive performance: it has high bonding strength, high thermal insulation temperature difference, low thermal conductivity, and heat resistance, acid and alkali resistance, salt spray resistance and weather resistance all meet strict test requirements; at the same time, the coating has moderate flexibility, no cracking when thickly coated, and wide construction adaptability (applicable to spraying, brushing, and roller coating). While ensuring the thermal insulation effect, the mechanical strength and durability of the coating are significantly improved, and it is suitable for long-term protection needs in the construction and industrial fields.

[0049] Although terms such as film-forming aids, dispersants, defoamers, neutralizing agents, wetting agents, leveling agents, and rheology modifiers are used frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waterborne heat-insulating and heat-preserving intermediate paint with high adhesive strength, characterized in that: By weight parts, including: Film-forming aid: 1 - 3 parts Dispersant: 1 - 3 parts Defoamer: 1 - 3 parts Neutralizer: 0.1 - 1 part Wetting agent: 0.1 - 1 part Leveling agent: 0.1 - 1 part Rheology aid: 0.1 - 1 part Acrylate polymer mixed emulsion: 50 - 55 parts Vacuum ceramic microspheres: 10 - 15 parts Hollow glass microspheres: 10 - 15 parts Coupling agent: 0.1 - 0.5 part Deionized water: 10 - 20 parts; Wherein, the acrylate polymer mixed emulsion is a mixture of styrene-acrylate copolymer emulsion and acrylic acid copolymer emulsion.

2. The high bond strength waterborne heat insulating intermediate paint according to claim 1, wherein: In the acrylate polymer mixed emulsion, the mass ratio of styrene-acrylate copolymer emulsion to acrylic acid copolymer emulsion is 1 - 3:7 - 9.

3. The high-adhesion-strength waterborne heat-insulating and heat-preserving intermediate paint according to claim 1, wherein: The styrene-acrylate copolymer emulsion is one or more of 7199, SD-800, BLJ-8816 and IRW-E037; the acrylic acid copolymer emulsion is Archsol 8218.

4. The high-adhesion-strength water-based heat-insulating and heat-preserving intermediate paint according to claim 1, wherein: The film-forming aid is a composition of one or more of ethylene glycol, diethylene glycol monobutyl ether and lauryl alcohol ester.

5. The waterborne heat-insulating and heat-preserving intermediate paint with high adhesive strength according to claim 1, characterized in that: The dispersant is a composition of one or more of maleic anhydride copolymer dispersants, acrylic acid-methyl acrylate copolymer dispersants and acrylic acid surfactants.

6. The high-adhesion-strength waterborne heat-insulating and heat-preserving intermediate paint according to claim 1, characterized in that: The defoamer is a composition of one or two of silicone defoamers and polyether silicone copolymer defoamers; the neutralizer is 25wt% - 28wt% ammonia water.

7. The high-adhesion-strength waterborne heat-insulating and heat-preserving intermediate paint according to claim 1, wherein: The wetting agent is a composition of one or two of non-ionic surfactants and polyether-modified silicone wetting agents.

8. The high-adhesion-strength waterborne heat-insulating and heat-preserving intermediate paint according to claim 1, characterized in that: The leveling agent is a composition of one or more of silicone surface active leveling aids, polyether-modified silicone leveling aids and ionic polyacrylate leveling aids; the rheology aid is a composition of one or two of organically modified montmorillonite clay rheology aids, polyether polyurethane rheology aids and waterborne acrylic associative alkali-swellable thickeners; the coupling agent is a composition of one or two of organosilicon oligomers KH-560 and A-187.

9. The high-bonding-strength waterborne heat-insulating and heat-preserving intermediate paint according to claim 1, characterized in that: The vacuum ceramic microspheres are lime borosilicate glass, with D50 being 2 - 4μm; the hollow glass microspheres are sodium calcium borosilicate glass, with D50 being 50 - 60μm.

10. A preparation method of a waterborne heat-insulating and heat-preserving intermediate paint with high bonding strength as described in any one of claims 1 to 9, characterized in that, The steps are as follows: S1. Add deionized water, film-forming aid, dispersant, defoamer, neutralizer, wetting agent into a container in sequence, adjust the rotation speed to 300 - 600 r / min, and disperse at high speed for 5 - 10 min; S2. Add the rheology aid into the mixed clear liquid, adjust the rotation speed to 500 - 1000 r / min, and disperse at high speed for 10 - 15 min; S3. Add the acrylate polymer emulsion, adjust the rotation speed to 500 - 800 r / min, and disperse at high speed for 5 - 10 min; S4. Add the vacuum ceramic microspheres and hollow glass microspheres, adjust the rotation speed to 600 - 800 r / min, and disperse at high speed for 10 - 20 min; S5. Add the leveling agent and coupling agent, adjust the rotation speed to 400 - 600 r / min, and disperse at high speed for 5 - 10 min; S6. Filter and package to obtain the finished product.

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