A combined coating for thermal insulation and heat reflection and a preparation method thereof

Abstract

The present application relates to the technical field of paint, and discloses a combined paint for heat insulation, heat reflection and temperature reduction and a preparation method thereof.The combined paint comprises an anticorrosive primer, a heat insulation intermediate paint and a heat reflection topcoat.The heat insulation intermediate paint comprises component A and component B in a weight ratio of (3-5):1, and the heat reflection topcoat comprises component C and component D in a weight ratio of (2-4):1.According to the weight fraction, component A mainly comprises modified bisphenol A epoxy resin 40-60 parts and petroleum resin 2-8 parts;component B mainly comprises amine composite curing agent prepolymer 60-90 parts;component C mainly comprises hydroxyl acrylic resin 20-40 parts, multifunctional polyether modified polyaspartic ester 5-10 parts and difunctional polyaspartic ester resin 5-10 parts;and component D mainly comprises polyisocyanate polymer 70-100 parts.The combined paint has excellent heat insulation and temperature reduction performance and good construction effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of paint technology, in particular to a combined coating for heat insulation, heat reflection and cooling and a preparation method thereof. BACKGROUND

[0002] Containers are usually made of metal materials with good heat conduction performance. In summer, the surface temperature of the container can reach about 60 degrees, and the operation of weapons and equipment, advanced electronic equipment, food, medicine and other materials loaded in the container in a high-temperature environment will affect the service life. In winter, the temperature can be as low as several tens of degrees below zero, which will also affect the service life of the weapons and equipment and the storage period of the materials loaded in the container. In order to ensure that the container is at a suitable temperature, many containers are equipped with air conditioners or thermal insulation cotton. However, if the metal walls of the container with good heat conduction are not treated for heat insulation, it is difficult to maintain a stable temperature in the container, and resources are also wasted to maintain the operation of the air conditioner. In addition, there is a great demand for heat insulation and cooling performance of steel structures in the fields of offshore platforms, marine equipment, military equipment, special vehicles and petroleum and chemical engineering. Therefore, it is necessary to prepare a heat insulation coating to treat the heat insulation of the container.

[0003] In the prior art, the patent CN 118879204 A "aerogel heat insulation coating, heat insulation coating and its application in vehicle wall" has good heat insulation performance, but the addition of aerogel in the topcoat coating will result in poor appearance of the paint film and lack of decoration. At the same time, water is used as a diluent, the total film thickness reaches 2-5mm, it is difficult to volatilize water in winter, the construction is difficult, and the hollow microbeads in the heat insulation coating reach 30-40 parts and the aerogel reaches 20-25 parts. The PVC of the coating far exceeds the CPVC, and the film thickness reaches 2-5mm. When the equipment substrate is thin and in long-term service, the paint film is prone to cracking. In addition, the patent uses a single-component emulsion as the main film-forming material of the topcoat, which has poor weather resistance.

[0004] The patent CN 117511331 A proposes an epoxy heavy-duty anticorrosive coating for marine splash zone and a preparation method thereof. The anticorrosive coating has excellent corrosion resistance, good anti-bubbling performance, good overcoating property and construction property. The present application uses the epoxy heavy-duty anticorrosive coating prepared by the patent CN 117511331 A as an anticorrosive primer, and proposes a combined coating for heat insulation, heat reflection and cooling on this basis to solve the above problems. SUMMARY

[0005] Based on the above, the purpose of the present application is to provide a combined coating for heat insulation, heat reflection and cooling and a preparation method thereof, which has excellent heat insulation and cooling performance and good construction effect.

[0006] To achieve the above purpose, the present application adopts the following technical solutions:

[0007] A combined coating for heat insulation, heat reflection and cooling, comprising an anti-corrosion primer, a heat insulation intermediate paint and a heat reflection and cooling topcoat.

[0008] The heat insulation intermediate paint comprises A component and B component in a weight ratio of (3-5):1.

[0009] The A component comprises the following raw materials in parts by weight: modified bisphenol A epoxy resin 40-60 parts, petroleum resin 2-8 parts, first dispersing agent 0.2-0.5 parts, first thixotropic agent 0.5-1.5 parts, coloring pigment 3-8 parts, aerogel 25-35 parts, silane coupling agent 0.5-1.5 parts, active diluent 1-3 parts, first solvent 3-10 parts, first leveling agent 0.2-0.5 parts.

[0010] The B component comprises the following raw materials in parts by weight: amine-based composite curing agent prepolymer 60-90 parts, second solvent 0-10 parts, accelerator 2-5 parts, first defoaming agent 1-2 parts.

[0011] The heat reflection and cooling topcoat comprises C component and D component in a weight ratio of (2-4):1.

[0012] The C component comprises the following raw materials in parts by weight: hydroxy acrylate resin 20-40 parts, multifunctional polyether modified polyaspartic ester 5-10 parts, difunctional polyaspartic ester resin 5-10 parts, second dispersing agent 0.5-1.5 parts, third solvent 10-25 parts, second thixotropic agent 0.5-1.5 parts, titanium dioxide 20-35 parts, filler 5-15 parts, second leveling agent 0.2-0.5 parts, second defoaming agent 0.2-0.5 parts, ultraviolet light absorber 0.2-1 parts.

[0013] The D component comprises the following raw materials in parts by weight: polyisocyanate polymer 70-100 parts, fourth solvent 0-10 parts, auxiliary agent 0-1 parts.

[0014] As a preferred scheme of the combined coating for heat insulation, heat reflection and cooling, the modified bisphenol A epoxy resin comprises one or more of Guodu 175LX90, SM172X75, and Hansen Resin 874LX90.

[0015] As a preferred scheme of the combined coating for heat insulation, heat reflection and cooling, the petroleum resin comprises one of C9 liquid petroleum resin and C10 liquid petroleum resin, specifically one or more of Novares LA300, LA700, and LA1200.

[0016] As a preferred solution of the combined coating for thermal insulation, heat reflection and cooling, the polyisocyanate polymer comprises one or more of FEICURE GB 926-85, FEICURE GB 905A-85, FEICURE GB 605A-100 from Shenzhen Feiyang, HT100 from Wanhua Chemical, HI100 from BASF, Desmodur N3800 from Covestro.

[0017] A preparation method of a combined coating for thermal insulation, heat reflection and cooling, based on any of the above combined coatings for thermal insulation, heat reflection and cooling, comprising the following steps:

[0018] The epoxy resin and the petroleum resin are added to a reaction kettle in parts by weight, stirred at a first rotation speed until mixed uniformly, the rotation speed is maintained, the first dispersant and the first thixotropic agent are added and stirred uniformly, a preset amount of the first solvent is added, the first rotation speed is increased to a second rotation speed, the pigment is slowly added, the reaction kettle wall is washed with a preset amount of the first solvent, the rotation speed is increased to a third rotation speed, when the temperature of the reaction solution reaches a preset temperature, the first preset time is continued, the aerogel, the silane coupling agent, the active diluent, the first leveling agent and the remaining first solvent are added at the second rotation speed, stirred uniformly, and A component is obtained;

[0019] The accelerator is added to the amine-based composite curing agent prepolymer in parts by weight, stirred at the first rotation speed for a second preset time, the amine value and viscosity of the amine-based composite curing agent prepolymer are controlled, and the second solvent and the first defoaming agent are added while stirring, stirred uniformly, and B component is obtained;

[0020] The A component and the B component are mixed in a weight ratio of (3-5): 1 to obtain a thermal insulation intermediate paint;

[0021] The hydroxyl acrylate resin, the multifunctional polyether modified polyaspartic ester resin and the difunctional polyaspartic ester resin are added to a reaction kettle in parts by weight, stirred at a first rotation speed until mixed uniformly, the rotation speed is maintained, the second dispersant and the second thixotropic agent are added and stirred uniformly, a preset amount of the third solvent is added, the rotation speed is increased to a second rotation speed, titanium dioxide and fillers are slowly added, and then part of the third solvent is used to wash the reaction kettle wall, the rotation speed is increased to a third rotation speed, the temperature of the dispersion liquid reaches a preset temperature, the first preset time is continued, and then transferred to a sand mill for grinding to a target particle size, the second leveling agent, the second defoaming agent and the ultraviolet light absorber are added at a second rotation speed, the remaining third solvent is used to adjust the solid content and viscosity, and C component is obtained;

[0022] The polyisocyanate polymer is added to the auxiliary and the fourth solvent under stirring at the first rotating speed to obtain component D;

[0023] The C component and the D component are mixed in a weight ratio of (2-4):1 to obtain a heat-reflecting cooling finish paint.

[0024] As a preferred scheme of the preparation method of the combined paint for thermal insulation, heat reflection and cooling, the preparation method of the amine-based composite curing agent prepolymer comprises:

[0025] The second solvent and the polyamide resin are added to a reaction kettle and stirred uniformly at the first rotating speed, and the bisphenol A epoxy resin is added while stirring, and after uniform stirring, the mixture is sealed and placed, and the amine value and viscosity are controlled to obtain the amine-based composite curing agent prepolymer.

[0026] As a preferred scheme of the preparation method of the combined paint for thermal insulation, heat reflection and cooling, the weight ratio of the polyamide resin to the bisphenol A epoxy resin is 5:1; and the bisphenol A epoxy resin comprises E20 epoxy resin.

[0027] As a preferred scheme of the preparation method of the combined paint for thermal insulation, heat reflection and cooling, the preparation method of the multifunctional polyether modified polyaspartic ester comprises:

[0028] Under the protection of inert gas, the multifunctional polyether amine is stirred with a catalyst, and heated to 65-75℃, and kept at this temperature, and the maleate is added under stirring, and after the addition is completed, the mixture is kept at 65-75℃ for 2-3 hours, and then heated to 85-100℃ and kept at this temperature for 16-24 hours to obtain the multifunctional polyether modified polyaspartic ester.

[0029] As a preferred scheme of the preparation method of the combined paint for thermal insulation, heat reflection and cooling, the weight parts of the multifunctional polyether amine is 20-40 parts, the weight parts of the catalyst is 0.01-0.5 parts, and the weight parts of the maleate is 10-30 parts.

[0030] The multifunctional polyether amine is an amino-terminated compound containing polyethylene glycol, polypropylene glycol or polytetrahydrofuran segment; the catalyst comprises one or more of triethylamine, N,N-dimethylcyclohexylamine and triethylene diamine; and the maleate comprises one or more of dimethyl maleate, diethyl maleate, dipropyl maleate, dibutyl maleate and diisooctyl maleate.

[0031] As a preferred scheme of the preparation method of the combined coating for heat insulation, heat reflection and temperature reduction, the first rotating speed is 300-500 rpm, the second rotating speed is 600-800 rpm, the third rotating speed is 1200-1500 rpm, the preset temperature is 55-65 DEG C, the first preset time is 20-30 minutes, the second preset time is 5-15 minutes, and the target particle size is less than or equal to 30 mu m.

[0032] The present application has the following advantages:

[0033] The present application provides a combined coating for heat insulation, heat reflection and temperature reduction, which comprises an anti-corrosion primer, a heat insulation intermediate coating and a heat reflection topcoat; for the heat insulation intermediate coating, a low-viscosity flexible modified modified bisphenol A epoxy resin is used in the preparation process, which is beneficial to the preparation of high solid content coating and helps to increase the flexibility of the coating, and the use of petroleum resin can improve the wettability of the coating to the primer and the interlayer adhesion between the coating and the primer and the topcoat; the amine-based composite curing agent prepolymer prepared by pre-polymerization of polyamide resin and E20 epoxy resin in the B component can not only speed up the drying speed of the coating to solve the problem of difficult construction in winter, but also further improve the anti-cracking property of the coating.

[0034] For the heat reflection coating, after the hydroxyl acrylate resin is added to the self-made polyetherized multifunctional polyaspartic ester resin in the C component, the double-function polyaspartic ester resin is matched, which can not only ensure the drying speed of the coating to solve the problem of difficult construction in winter, but also ensure the flexibility of the coating, improve the anti-cracking property of the coating, and ensure the aging resistance of the coating; in addition, by using titanium dioxide, the flatness and hiding power of the coating are ensured, and the solar reflectance and hemispherical emissivity of the product are ensured; the D component of the coating uses a polyisocyanate polymer, which uses a flexible curing agent matched with a fast-drying curing agent, which further ensures the flexibility and winter workability of the coating. The combined coating uses a heat reflection topcoat matched with a heat insulation coating, which not only ensures the heat insulation effect of the coating, but also ensures the appearance and aging resistance of the coating.

[0035] By combining the use of the anti-corrosion primer, the heat insulation intermediate coating and the heat reflection topcoat, the combined coating has a wide construction window and excellent construction effect in all seasons. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of the contents of the embodiments of the present application and the drawings.

[0037] Figure 1 is a specific reaction mechanism of the multifunctional polyaspartic ester resin of the present application. DETAILED DESCRIPTION

[0038] In order to facilitate the understanding of the present application, the present application will be described more fully below. The present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Unless otherwise defined, all technical and scientific terms used in the present application belong to the technical field of the present application.

[0039] The present embodiment provides a combined coating for thermal insulation, heat reflection and cooling, which comprises an anticorrosive primer, a thermal insulation intermediate paint and a heat reflection and cooling topcoat. The preparation method of the combined coating for thermal insulation, heat reflection and cooling comprises the following steps:

[0040] The epoxy resin and the petroleum resin are added into a reaction kettle in parts by weight, and are stirred at a first rotating speed until they are uniformly mixed. Then, a first dispersing agent and a first thixotropic agent are added and stirred until they are uniformly mixed. Then, a preset amount of a first solvent is added, the rotating speed is increased to a second rotating speed, and pigments are slowly added. The reaction kettle wall is cleaned with the preset amount of the first solvent, the rotating speed is increased to a third rotating speed, and the temperature of the reaction solution reaches a first preset temperature. Then, the first dispersing is continued for a first preset time, and aerogel, a silane coupling agent, an active diluent, a first leveling agent and the remaining first solvent are added at the second rotating speed. The mixture is stirred until it is uniformly mixed, and the thermal insulation intermediate paint A component is obtained.

[0041] The promoter is added into the amine-based composite curing agent prepolymer in parts by weight, and is stirred at a first rotating speed for a second preset time. The amine value and the viscosity of the amine-based composite curing agent prepolymer are controlled (the amine value of the prepolymer is 260-300 mgKOH / g, and the viscosity is 15000-20000 cps). The second solvent and the first defoaming agent are added while stirring, and the mixture is stirred until it is uniformly mixed. The thermal insulation intermediate paint B component is obtained.

[0042] The A component and the B component are mixed in a ratio of (3-5):1 to obtain the thermal insulation intermediate paint.

[0043] Specifically, the preparation method of the amine composite curing agent prepolymer comprises: adding the second solvent and the polyamide resin into a reaction kettle according to the weight parts, stirring uniformly at a first rotating speed, adding the bisphenol A epoxy resin while stirring, sealing after uniform stirring, placing at room temperature for one night, controlling the amine value and the viscosity (the amine value of the prepolymer is 260-300 mgKOH / g, and the viscosity is 15000-20000 cps), and obtaining the amine composite curing agent prepolymer.

[0044] Specifically, the first rotating speed is 300-500 rpm, the second rotating speed is 600-800 rpm, the third rotating speed is 1200-1500 rpm, the preset temperature is 55-65℃, the first preset time is 20-30 minutes, and the second preset time is 5-15 minutes.

[0045] In the formula, the A component comprises the following raw materials in parts by weight: modified bisphenol A epoxy resin 40-60 parts, petroleum resin 2-8 parts, first dispersing agent 0.2-0.5 parts, first thixotropic agent 0.5-1.5 parts, coloring pigment 3-8 parts, aerogel 25-35 parts, silane coupling agent 0.5-1.5 parts, active diluent 1-3 parts, first solvent 3-10 parts, and first leveling agent 0.2-0.5 parts; and the B component comprises the following raw materials in parts by weight: amine composite curing agent prepolymer 60-90 parts, second solvent 0-10 parts, accelerator 2-5 parts, and first defoaming agent 1-2 parts.

[0046] Specifically, in the A group: the modified bisphenol A epoxy resin includes one or more of Guodou 175LX90, SM172X75, Honsen Resin 874LX90, preferably the flexible bisphenol A epoxy resin is Honsen Resin 874LX90; the petroleum resin includes one of C9 liquid petroleum resin and C10 liquid petroleum resin, specifically includes one or a combination of several of Germany Lutgendorf Aromatic Hydrocarbon C9 / C10 Liquid Petroleum Resin Novares LA300, LA700, LA1200, Taiwan Yuanliang Product C9 Solid Petroleum Resin SK-120, preferably the petroleum resin is liquid petroleum resin LA300; the first dispersant includes one or more of BYK-163, BYK-164, and Troysperse CD1, preferably BYK-164; the first thixotropic agent includes one or more of polyamide wax powder, amide modified wax powder, bentonite, and fumed silica, preferably polyamide wax powder CRAYVALLAC ULTRA; the coloring pigment includes rutile titanium dioxide, preferably Sichuan Longmen R996; the aerogel includes one or more of PyroGel XT, CryoGel Z, and Spaceloft of Aspen Company of the United States, preferably the aerogel is PyroGel XT; the silane coupling agent includes one or more of KH550, KH560, KH570, and Dow Corning OSF6040, preferably Dow Corning OSF6040, which exhibits more excellent salt mist resistance, seawater resistance, and water resistance; the active diluent includes one or more of Cardolite NC513, Cardolite NT3000, and Honsen Versatic Acid Glycidyl Ester CARDURAE10P, preferably Honsen Versatic Acid Glycidyl Ester CARDURAE10P, all of which can reduce the viscosity of the epoxy resin, and the use of Honsen Versatic Acid Glycidyl Ester CARDURAE10P has the best primer wettability; the first solvent includes one or more of dimethylbenzene, trimethylbenzene, n-butanol, isobutyl alcohol, propylene glycol methyl ether, ethylene glycol butyl ether, furfuryl alcohol, and benzyl alcohol, preferably dimethylbenzene and propylene glycol methyl ether; the first leveling agent includes one or more of BYK320, BYK333, BYK358N, BYK310, TEGO425, and BASF leveling agents (3522, 3580, 3650, 3886, 3740), preferably at least one of BYK320 and BYK333, which has the best leveling effect.

[0047] Specifically, in the B component: the first defoaming agent includes one or more of BYK-066N, BYK-A530, BYK-057, BYK-028, Defom 6800, Foamex-8030, and BYK-088, preferably at least one of BYK-066N and Defom 6800, which has the best defoaming effect; the second solvent includes one or more of dimethylbenzene, trimethylbenzene, furfuryl alcohol, and n-butanol, preferably dimethylbenzene and n-butanol are mixed for use; the amine-based composite curing agent prepolymer is polymerized from polyamide resin and bisphenol A epoxy resin, the polyamide resin in the amine-based composite curing agent prepolymer is preferably Kadelai NT-1544, and the bisphenol A epoxy resin is preferably E20 epoxy resin, and the weight ratio of bisphenol A epoxy resin to polyamide is 1:5; the accelerator includes one or more of Kadelai NT-1300, Yincang K54, and ethylenediamine oleate, and preferably the accelerator is at least one of Kadelai NT-1300 and Yincang K54.

[0048] The hydroxy acrylate resin, the multifunctional polyether modified polyaspartic ester resin, and the difunctional polyaspartic ester resin are added into a reaction kettle in parts by weight, stirred at a first rotating speed until mixed uniformly, the rotating speed is kept unchanged, the second dispersant and the second thixotropic agent are added and stirred uniformly, a preset amount of the third solvent is added, the rotating speed is increased to a second rotating speed, the titanium dioxide and the filler are slowly added, then the reaction kettle wall is washed with part of the third solvent, the rotating speed is increased to a third rotating speed, the temperature of the dispersion liquid reaches a preset temperature, and the dispersion is continued for a first preset time, then the dispersion liquid is transferred into a sand mill for grinding to a target particle size, the second leveling agent, the second defoaming agent, and the ultraviolet light absorber are added at the second rotating speed, and the remaining third solvent is used to adjust the solid content and the viscosity (the viscosity is 60-90 ku, and the solid content is 60-75%), thereby obtaining the C component of the heat-reflecting cooling topcoat.

[0049] The multifunctional polyisocyanate polymer is added into the auxiliary agent and the fourth solvent under the stirring condition of the first rotating speed, thereby obtaining the D component of the heat-reflecting cooling topcoat.

[0050] The C component and the D component are mixed in a ratio of (2-4):1 to obtain the heat-reflecting cooling topcoat.

[0051] Specifically, the preparation method of the multifunctional polyether modified polyaspartic ester includes the following steps: under the protection of inert gas, the multifunctional polyether amine is stirred with a catalyst, and heated to 65-75°C, and kept warm, the maleate is added under the stirring condition, and after the addition is completed, the temperature is kept at 65-75°C for 2-3 hours, the temperature is increased to 85-100°C and kept warm for 16-24 hours, thereby obtaining the multifunctional polyether modified polyaspartic ester.

[0052] Specifically, in the preparation process of the multifunctional polyether-modified polyaspartic ester, the catalyst includes one or more of triethylamine, N,N-dimethylcyclohexylamine, and triethylenediamine; the weight parts of the multifunctional polyether amine is 20-40, the weight parts of the catalyst is 0.01-0.5, and the weight parts of the maleate is 10-30. The multifunctional polyaspartic ester resin is obtained by Michael addition reaction of the multifunctional polyether amine and the maleate (the specific reaction mechanism is shown in Figure 1 The multifunctional polyether amine is an amino-terminated compound containing polyethylene glycol, polypropylene glycol, or polytetrahydrofuran segment, and includes one or more of Huntsman D-400, Huntsman T403, Huntsman D-2000, Wanhua Chemical WANAMINE 8100, BASF EC301, and BASF EC303, preferably Huntsman D-400; and the maleate includes one or more of dimethyl maleate, diethyl maleate, dipropyl maleate, dibutyl maleate, and diisooctyl maleate, preferably dibutyl maleate.

[0053] Specifically, the first rotation speed is 300-500 rpm, the second rotation speed is 600-800 rpm, the third rotation speed is 1200-1500 rpm, the preset temperature is 55-65℃, the first preset time is 20-30 minutes, the second preset time is 5-15 minutes, and the target particle size is less than or equal to 30 μm.

[0054] The C component includes the following raw materials in parts by weight: 20-40 parts of a hydroxyl acrylate resin, 5-10 parts of a multifunctional polyether-modified polyaspartic ester, 5-10 parts of a difunctional polyaspartic ester resin, 0.5-1.5 parts of a second dispersing agent, 10-25 parts of a third solvent, 0.5-1.5 parts of a second thixotropic agent, 20-35 parts of titanium white, 5-15 parts of a filler, 0.2-0.5 parts of a second leveling agent, 0.2-0.5 parts of a second defoaming agent, and 0.2-1 parts of an ultraviolet light absorber; and the D component includes the following raw materials in parts by weight: 70-100 parts of a polyisocyanate polymer, 0-10 parts of a fourth solvent, and 0-1 parts of an auxiliary.

[0055] Specifically, in the C component: the hydroxy acrylic resin includes one or more of Covestro 2100ss-80, 1753ss-70, synocure 854ba80 and Shide 6750 resin; the bifunctional polyaspartic ester resin includes one or more of Feiyang F420, Feiyang F520, Feiyang F524 and Wanhua WH420, preferably Wanhua WH420; the titanium white powder includes one or more of Venator Panolite ALTIRIS 800, Longmen R996 and Shihua R-550 titanium white powder, preferably Venator Panolite ALTIRIS 800 combined with Longmen R996, the combination ratio is 1:2; the second dispersing agent is BYK-164; the third solvent is butyl acetate and xylene; the second thixotropic agent is ULTRA; the filler is barium sulfate; the second defoaming agent includes one of BYK-066N and Defom 6800, the ultraviolet light absorber is BASF 292, and the second leveling agent includes BYK-320.

[0056] Specifically, in the D component: the polyisocyanate polymer includes one or more of Shenzhen Feiyang FEICURE GB 926-85, Shenzhen Feiyang FEICURE GB 905A-85, Shenzhen Feiyang FEICURE GB 605A-100, Wanhua Chemical HT100, BASF HI100 and Covestro Desmodur N3800, preferably FEICURE GB 926-85 of Shenzhen Feiyang combined with BASF HI100, the specific combination ratio is 1:3; the fourth solvent is butyl acetate; the auxiliary agent is OF produced by Bayer Company as a water removing agent.

[0057] The application is further described below through specific examples.

[0058] Example 1

[0059] The preparation method of the anticorrosive primer includes:

[0060] Preparation of the first component: 40 kg of E20 epoxy resin and E51 epoxy resin were mixed first, with the weight ratio of E20 epoxy resin and E51 epoxy resin being 1:4, 5 kg of liquid petroleum resin LA700 and solid petroleum resin SK-120 were mixed, with the weight ratio of liquid petroleum resin LA700 and solid petroleum resin SK-120 being 2:1, and then added into a first reaction kettle, stirred at 400 rpm until the solid petroleum resin was completely dissolved, the stirring speed was maintained, 1.5 kg of thixotropic agent (a mixture of ULTRA and SD-2) was added and stirred uniformly, 3 kg of solvent (a mixture of dimethylbenzene and benzyl alcohol) was added, the stirring speed was increased to 700 rpm, 6 kg of R996 titanium dioxide and 40 kg of filler were slowly added, then 1 kg of solvent (a mixture of dimethylbenzene and benzyl alcohol) was used to clean the inner wall of the first reaction kettle, the stirring speed was increased to 1300 rpm, the temperature of the dispersion liquid reached 55°C, and the dispersion was continued for 25 minutes, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320 and 0.2 kg of first solvent (a mixture of dimethylbenzene and benzyl alcohol) were added at a stirring speed of 700 rpm to obtain component A.

[0061] Preparation of the second component prepolymer: 30 kg of solvent (a mixture of dimethylbenzene, trimethylbenzene and n-butanol) and 30 kg of polyamide curing agent NT-1544 were added into a reaction kettle and stirred at 400 rpm until uniform, 6 kg of bisphenol F epoxy resin GY 282 was added while stirring, and after uniform stirring, the reaction kettle was sealed and placed at room temperature overnight, the amine value and viscosity were controlled to obtain an amine composite curing agent prepolymer.

[0062] Preparation of the second component: if the amine value of the amine composite curing agent prepolymer is qualified, 3 kg of accelerator (a mixture of NT1300 and ethylenediamine oleate) was added and stirred at 400 rpm for 10 min, the amine value and viscosity were controlled, 30 kg of modified aliphatic amine 2280 and 1 kg of defoaming agent BYK066N were added while stirring, and stirred uniformly to obtain component B.

[0063] The first component and the second component were mixed in a ratio of 4:1 to obtain an epoxy anticorrosive primer.

[0064] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 2 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 300 rpm until mixed evenly. Keep the stirring speed and add 0.2 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA and stir until evenly mixed. Add 2 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 800 rpm, slowly add 3 kg of R996 titanium white, then wash the kettle wall with 1 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 1500 rpm, and the temperature of the dispersion reaches 55°C. Continue to disperse for 30 minutes (control temperature 55°C), and then add 25 kg of aerogel, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320, and the remaining solvent (a mixture of xylene and propylene glycol methyl ether) in the formula, stir until evenly mixed, and obtain the heat insulation intermediate paint A component.

[0065] Preparation of the amine-based composite curing agent prepolymer of the heat insulation intermediate paint B component: First, add 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin to the reaction kettle and stir at 500 rpm until evenly mixed. While stirring, add bisphenol A epoxy resin, stir until evenly mixed, seal, and let stand at room temperature overnight. Control the amine value and viscosity to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin is 5:1.

[0066] Preparation of the heat insulation intermediate paint B component: In 60 kg of the amine-based composite curing agent prepolymer, add 2 kg of accelerator NT1300 and stir at 500 rpm for 10 minutes. Control the amine value and viscosity, and while stirring, add 10 kg of xylene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N. Stir until evenly mixed to obtain the B component.

[0067] Mix the A component and the B component in a ratio of 4:1 to obtain the heat insulation intermediate paint.

[0068] Preparation of the multifunctional polyether-modified polyaspartic ester of the heat-reflecting cooling topcoat: Under the protection of inert gas, 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred and heated to 75°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added. After the addition was completed, it was kept at 75°C for 3 hours, and then heated to 100°C and kept for 24 hours to obtain the multifunctional polyether-modified polyaspartic ester.

[0069] Preparation of heat reflective cooling top coat C component: 20 kg of 1753ss-70 hydroxyl acrylic resin, 5 kg of self-made multifunctional polyether modified polyaspartic ester resin, 5 kg of bifunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 500 rpm until mixed uniformly, the stirring speed was kept, 0.5 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA were added and stirred uniformly, 8 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, 20 kg of titanium dioxide (ALTIRIS 800 and R996 combined in a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added, then 2 kg of solvent (a mixture of butyl acetate and xylene) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1500 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 65°C), then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.3 g of leveling agent BYK-320, 0.2 kg of defoaming agent BYK-066N and 0.2 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 800 rpm, and the remaining solvent (a mixture of butyl acetate and xylene) was used to adjust the solid content and viscosity, to obtain the heat reflective cooling top coat C component.

[0070] Preparation of heat reflective cooling top coat D component: 90 kg of polyisocyanate polymer curing agent (FEICURE GB926-85 mixed with HI100 in a ratio of 1:3) was stirred at a stirring speed of 500 rpm to obtain the heat reflective cooling top coat D component.

[0071] The C component and the D component were mixed in a ratio of 4:1 to obtain the heat reflective cooling top coat paint.

[0072] Example 2

[0073] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0074] Preparation of the thermal insulation intermediate paint A component: 60 kg of 874 LX90 epoxy resin and 8 kg of liquid petroleum resin LA300 were first added to a reaction kettle and stirred at 500 rpm until mixed uniformly. Then 0.2 kg of dispersant BYK-164 and 1 kg of thixotropic agent ULTRA were added and stirred uniformly. 4 kg of solvent (a mixture of xylene and propylene glycol methyl ether) was added, the stirring speed was increased to 600 rpm, 3 kg of R996 titanium white powder was slowly added, then 2 kg of the mixture of xylene and propylene glycol methyl ether was used to clean the kettle wall, the stirring speed was increased to 1200 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 20 minutes (the temperature was controlled at 65°C). At a stirring speed of 600 rpm, 35 kg of aerogel, 0.5 kg of silane coupling agent OSF6040, 1 kg of active diluent glycidyl ester E10P, 0.2 kg of leveling agent BYK-320, and the remaining solvent mixture of xylene and propylene glycol methyl ether in the formula were added and stirred uniformly to obtain the thermal insulation intermediate paint A component.

[0075] Preparation of the thermal insulation intermediate paint B component prepolymer: 2 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin were first added to a reaction kettle and stirred at 300 rpm until uniform. Bisphenol A epoxy resin was added while stirring, and after uniform stirring, the kettle was sealed and left at room temperature overnight. The amine value and viscosity were controlled to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin was 5:1.

[0076] Preparation of the thermal insulation intermediate paint B component: 5 kg of accelerator NT1300 was added to 90 kg of amine-based composite curing agent prepolymer and stirred at 300 rpm for 10 minutes. The amine value and viscosity were controlled, 2 kg of defoamer BYK066N was added while stirring, and the mixture was stirred uniformly to obtain the B component.

[0077] The A component and the B component were mixed in a ratio of 4:1 to obtain the thermal insulation intermediate paint.

[0078] Preparation of the thermal reflection cooling topcoat multifunctional polyether modified polyaspartic ester: Under the protection of inert gas, 30 parts of polyether amine was stirred with 0.1 part of triethylene diamine catalyst and heated to 65°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added, and after the addition was completed, it was kept at 65°C for 2 hours. The temperature was increased to 85-100°C and kept for 16 hours to obtain the functional polyether modified polyaspartic ester.

[0079] Preparation of heat reflective cooling top coat C component: 20 kg of 1753ss-70 hydroxyl acrylic resin, 5 kg of self-made multifunctional polyether modified polyaspartic ester resin, 5 kg of difunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 300 rpm until mixed uniformly, keep the stirring speed, 0.5 kg of dispersant and 0.5 kg of thixotropic agent were added and stirred uniformly, 8 kg of solvent (butyl acetate and xylene mixture) was added, the stirring speed was increased to 600 rpm, 20 kg of titanium dioxide (ALTIRIS 800 and R996 combined ratio of 1:2) and 10 kg of barium sulfate filler were slowly added, then 2 kg of solvent (butyl acetate and xylene mixture) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1200 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 20 minutes (temperature control 55°C). Then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm. 0.2 g of leveling agent BYK-320, 0.3 kg of defoaming agent BYK-066N and 0.3 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 600 rpm. The remaining solvent (butyl acetate and xylene mixture) in the formula was used to adjust the solid content and viscosity, and the heat reflective cooling top coat C component was obtained.

[0080] Preparation of heat reflective cooling top coat D component: 90 kg of curing agent (FEICURE GB 926-85 mixed with HI100 at a ratio of 1:3) was stirred at a stirring speed of 300 rpm to obtain the heat reflective cooling top coat D component.

[0081] The C component and the D component were mixed at a ratio of 4:1 to obtain the heat reflective cooling top coat paint.

[0082] Example 3

[0083] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0084] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 8 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 400 rpm until mixed evenly. 0.5 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA were added and stirred evenly. 5 kg of solvent (a mixture of xylene and propylene glycol methyl ether) was added, the stirring speed was increased to 700 rpm, 8 kg of R996 titanium dioxide was slowly added, then 2 kg of xylene and propylene glycol methyl ether mixture was used to clean the kettle wall, the stirring speed was increased to 1350 rpm, the dispersion temperature reached 55℃, and the dispersion was continued for 20 minutes (temperature control 60℃). At a stirring speed of 700 rpm, 35 kg of aerogel, 1.5 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.4 kg of leveling agent BYK-320 and the remaining solvent mixture of xylene and propylene glycol methyl ether in the formula were added and stirred evenly to obtain the heat insulation intermediate paint A component.

[0085] Preparation of the amine composite curing agent prepolymer of the heat insulation intermediate paint B component: 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin were first added to the reaction kettle and stirred at 400 rpm until evenly mixed. Bisphenol A epoxy resin was added while stirring, and after stirring evenly, it was sealed and left at room temperature overnight. The amine value and viscosity were controlled to obtain the B component prepolymer. The mass ratio of NT-1544 to E20 resin was 5:1.

[0086] Preparation of the heat insulation intermediate paint B component: 3 kg of accelerator NT1300 was added to the amine value of the amine composite curing agent prepolymer, and stirred at 400 rpm for 10 min. The amine value and viscosity were controlled, and 5 kg of xylene and n-butanol mixture solvent and 2 kg of defoamer BYK066N were added while stirring. The B component was obtained after stirring evenly.

[0087] The A component and the B component were mixed in a ratio of 5:1 to obtain the heat insulation intermediate paint.

[0088] Preparation of the multifunctional polyether modified polyaspartic ester of the heat reflective cooling topcoat: Under the protection of inert gas, 40 parts of polyether amine and 0.01 parts of N,N-dimethylcyclohexylamine catalyst were stirred and heated to 70℃, and 10 parts of maleic acid dibutyl ester was added under stirring. After the addition was completed, it was kept at 70℃ for 2.5 hours, and then heated to 90℃ and kept for 20 hours to obtain the multifunctional polyether modified polyaspartic ester.

[0089] Preparation of heat reflective cooling top coat C component: 20 kg of 1753ss-70 hydroxyl acrylic resin, 5 kg of self-made multifunctional polyether modified polyaspartic ester resin, 5 kg of difunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 400 rpm until mixed uniformly, the stirring speed was maintained, 0.5 kg of dispersant and 0.5 kg of thixotropic agent were added and stirred uniformly, 8 kg of solvent (butyl acetate and xylene mixture) was added, the stirring speed was increased to 700 rpm, 20 kg of titanium dioxide (ALTIRIS 800 and R996 combined in a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added, then 2 kg of solvent (butyl acetate and xylene mixture) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1350 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 20 minutes (temperature controlled at 55°C), then transferred to a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.3 g of leveling agent BYK-320, 0.2 kg of defoaming agent BYK-066N and 0.2 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 700 rpm, the remaining solvent (butyl acetate and xylene mixture) in the formula was used to adjust the solid content and viscosity, and the heat reflective cooling top coat C component was obtained.

[0090] Preparation of heat reflective cooling top coat D component: 90 kg of curing agent (FEICURE GB 926-85 mixed with HI100 in a ratio of 1:3) was stirred at a stirring speed of 400 rpm to obtain the heat reflective cooling top coat D component.

[0091] The C component and the D component were mixed in a ratio of 4:1 to obtain the heat reflective cooling top coat paint.

[0092] Example 4

[0093] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0094] Preparation of the heat insulation intermediate paint A component: 50 kg of 874 LX90 epoxy resin and 6 kg of liquid petroleum resin LA300 were first added to a reaction kettle and stirred at 300 rpm until mixed uniformly. Then 0.4 kg of dispersant BYK-164 and 1.5 kg of thixotropic agent ULTRA were added and stirred uniformly. Then 8 kg of solvent (a mixture of dimethylbenzene and propylene glycol methyl ether) was added, the stirring speed was increased to 800 rpm, 7 kg of R996 titanium white powder was slowly added, then 2 kg of the mixture of dimethylbenzene and propylene glycol methyl ether was used to clean the wall of the reaction kettle, the stirring speed was increased to 1500 rpm, the temperature of the dispersion liquid reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 55°C). Then 30 kg of aerogel, 1 kg of silane coupling agent OSF6040, 1 kg of active diluent glycidyl ester E10P, 0.5 kg of leveling agent BYK-320, and the remaining solvent of the mixture of dimethylbenzene and propylene glycol methyl ether in the formula were added at a stirring speed of 800 rpm, and stirred uniformly to obtain the heat insulation intermediate paint A component.

[0095] Preparation of the amine composite curing agent prepolymer of the heat insulation intermediate paint B component: 3 kg of solvent (a mixture of dimethylbenzene and n-butanol) and polyamide resin were first added to a reaction kettle and stirred at 500 rpm until uniformly mixed. Then bisphenol A epoxy resin was added while stirring, and the mixture was sealed and left to stand at room temperature overnight. The amine value and viscosity were controlled to obtain the B component prepolymer. The mass ratio of NT-1544 to E20 resin was 5:1.

[0096] Preparation of the heat insulation intermediate paint B component: 4 kg of accelerator K54 was added to the amine value of the amine composite curing agent prepolymer, and stirred at 500 rpm for 10 minutes. The amine value and viscosity were controlled, 10 kg of dimethylbenzene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N were added while stirring, and the mixture was stirred uniformly to obtain the B component.

[0097] The A component and the B component were mixed in a ratio of 3:1 to obtain the heat insulation intermediate paint.

[0098] Preparation of the multifunctional polyether modified polyaspartic ester of the heat-reflecting cooling topcoat: 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred under the protection of inert gas and heated to 75°C. Then 10 parts of dibutyl maleate was added under stirring, and after the addition was completed, the mixture was kept at 75°C for 3 hours, heated to 100°C and kept for 24 hours to obtain the multifunctional polyether modified polyaspartic ester.

[0099] Preparation of heat reflective cooling top coat C component: 20 kg of 1753ss-70 hydroxyl acrylic resin, 5 kg of self-made multifunctional polyether modified polyaspartic ester resin, 5 kg of bifunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 500 rpm until mixed uniformly, the stirring speed was kept, 0.5 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA were added and stirred uniformly, 8 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, 20 kg of titanium dioxide (ALTIRIS 800 and R996 combined in a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added, then 2 kg of solvent (a mixture of butyl acetate and xylene) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1500 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 65°C), then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.3 g of leveling agent BYK-320, 0.2 kg of defoaming agent BYK-066N and 0.2 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 800 rpm, and the remaining solvent (a mixture of butyl acetate and xylene) was used to adjust the solid content and viscosity, to obtain the heat reflective cooling top coat C component.

[0100] Preparation of heat reflective cooling top coat D component: 90 kg of polyisocyanate polymer curing agent (FEICURE GB926-85 mixed with HI100 in a ratio of 1:3) was stirred at a stirring speed of 500 rpm to obtain the heat reflective cooling top coat D component.

[0101] The C component and the D component were mixed in a ratio of 4:1 to obtain the heat reflective cooling top coat paint.

[0102] Example 5

[0103] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0104] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 2 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 300 rpm until mixed evenly. Keep the stirring speed and add 0.2 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA and stir until evenly mixed. Add 2 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 800 rpm, slowly add 3 kg of R996 titanium white, then wash the kettle wall with 1 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 1500 rpm, and the temperature of the dispersion reaches 55°C. Continue to disperse for 30 minutes (control temperature 55°C), and then add 25 kg of aerogel, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320, and the remaining solvent (a mixture of xylene and propylene glycol methyl ether) in the formula, stir until evenly mixed, and obtain the heat insulation intermediate paint A component.

[0105] Preparation of the amine-based composite curing agent prepolymer of the heat insulation intermediate paint B component: First, add 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin to the reaction kettle and stir at 500 rpm until evenly mixed. While stirring, add bisphenol A epoxy resin, stir until evenly mixed, seal, and let stand at room temperature overnight. Control the amine value and viscosity to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin is 5:1.

[0106] Preparation of the heat insulation intermediate paint B component: In the amine value of 60 kg of amine-based composite curing agent prepolymer, add 2 kg of accelerator NT1300 and stir at 500 rpm for 10 minutes. Control the amine value and viscosity, and while stirring, add 10 kg of xylene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N. Stir until evenly mixed to obtain the B component.

[0107] Mix the A component and the B component in a ratio of 4:1 to obtain the heat insulation intermediate paint.

[0108] Preparation of the multifunctional polyether-modified polyaspartic ester of the heat-reflecting cooling topcoat: Under the protection of inert gas, 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred and heated to 75°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added. After the addition was completed, it was kept at 75°C for 3 hours, and then heated to 100°C and kept for 24 hours to obtain the multifunctional polyether-modified polyaspartic ester.

[0109] Preparation of heat reflective cooling top coat C component: 20 kg of 1753ss-70 hydroxyl acrylic resin, 5 kg of self-made multifunctional polyether modified polyaspartic ester resin, 5 kg of bifunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 500 rpm until mixed uniformly, the stirring speed was kept, 0.5 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA were added and stirred uniformly, 8 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, 20 kg of titanium dioxide (ALTIRIS 800 and R996 combined in a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added, then 2 kg of solvent (a mixture of butyl acetate and xylene) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1500 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 65°C), then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.3 g of leveling agent BYK-320, 0.2 kg of defoaming agent BYK-066N and 0.2 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 800 rpm, and the remaining solvent (a mixture of butyl acetate and xylene) was used to adjust the solid content and viscosity, to obtain the heat reflective cooling top coat C component.

[0110] Preparation of heat reflective cooling top coat D component: 90 kg of polyisocyanate polymer curing agent (FEICURE GB926-85 mixed with HI100 in a ratio of 1:3) was stirred at a stirring speed of 500 rpm to obtain the heat reflective cooling top coat D component.

[0111] The C component and the D component were mixed in a ratio of 4:1 to obtain the heat reflective cooling top coat paint.

[0112] Example 6

[0113] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0114] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 2 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 300 rpm until mixed evenly. Keep the stirring speed and add 0.2 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA and stir until evenly mixed. Add 2 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 800 rpm, slowly add 3 kg of R996 titanium white, then wash the kettle wall with 1 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 1500 rpm, and the temperature of the dispersion reaches 55°C. Continue to disperse for 30 minutes (control temperature 55°C), and then add 25 kg of aerogel, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320, and the remaining solvent (a mixture of xylene and propylene glycol methyl ether) in the formula, stir until evenly mixed, and obtain the heat insulation intermediate paint A component.

[0115] Preparation of the amine-based composite curing agent prepolymer of the heat insulation intermediate paint B component: First, add 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin to the reaction kettle and stir at 500 rpm until evenly mixed. While stirring, add bisphenol A epoxy resin, stir until evenly mixed, seal, and let stand at room temperature overnight. Control the amine value and viscosity to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin is 5:1.

[0116] Preparation of the heat insulation intermediate paint B component: In 60 kg of the amine-based composite curing agent prepolymer, add 2 kg of accelerator NT1300 and stir at 500 rpm for 10 minutes. Control the amine value and viscosity, and while stirring, add 10 kg of xylene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N. Stir until evenly mixed to obtain the B component.

[0117] Mix the A component and the B component in a ratio of 4:1 to obtain the heat insulation intermediate paint.

[0118] Preparation of the multifunctional polyether-modified polyaspartic ester of the heat-reflecting cooling topcoat: Under the protection of inert gas, 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred and heated to 75°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added. After the addition was completed, it was kept at 75°C for 3 hours, and then heated to 100°C and kept for 24 hours to obtain the multifunctional polyether-modified polyaspartic ester.

[0119] Preparation of heat reflective cooling top coat C component: 40 kg of 1753 ss-70 hydroxyl acrylic resin, 5 kg of self-made multifunctional polyether modified polyaspartic ester resin, 5 kg of bifunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 500 rpm until mixed uniformly, the stirring speed was maintained, 0.5 kg of dispersant and 0.5 kg of thixotropic agent were added and stirred uniformly, 19 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, 35 kg of titanium dioxide (ALTIRIS 800 and R996 combined in a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added, then 1 kg of solvent was used to clean the kettle wall, the stirring speed was increased to 1500 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 65°C), then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.3 g of leveling agent BYK-320, 0.2 kg of defoaming agent BYK-066N and 0.2 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 800 rpm, the remaining solvent (a mixture of butyl acetate and xylene) was used to adjust the solid content and viscosity, and the heat reflective cooling top coat C component was obtained.

[0120] Preparation of heat reflective cooling top coat D component: 90 kg of curing agent (FEICURE GB 926-85 mixed with HI100 in a ratio of 1:3) was added into 1 kg of auxiliary and 5 kg of solvent (the solvent was butyl acetate and the auxiliary was OF produced by Bayer Company) under stirring at 500 rpm to obtain the heat reflective cooling top coat D component.

[0121] The C component and the D component were mixed in a ratio of 2:1 to obtain the heat reflective cooling top coat paint.

[0122] Example 7

[0123] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0124] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 2 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 300 rpm until mixed evenly. Keep the stirring speed and add 0.2 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA and stir until evenly mixed. Add 2 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 800 rpm, slowly add 3 kg of R996 titanium white, then wash the kettle wall with 1 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 1500 rpm, and the temperature of the dispersion reaches 55°C. Continue to disperse for 30 minutes (control temperature 55°C), and then add 25 kg of aerogel, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320, and the remaining solvent (a mixture of xylene and propylene glycol methyl ether) in the formula, stir until evenly mixed, and obtain the heat insulation intermediate paint A component.

[0125] Preparation of the amine-based composite curing agent prepolymer of the heat insulation intermediate paint B component: First, add 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin to the reaction kettle and stir at 500 rpm until evenly mixed. Add bisphenol A epoxy resin while stirring, stir until evenly mixed, seal, and let stand at room temperature overnight. Control the amine value and viscosity to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin is 5:1.

[0126] Preparation of the heat insulation intermediate paint B component: In 60 kg of the amine-based composite curing agent prepolymer, add 2 kg of accelerator NT1300 and stir at 500 rpm for 10 minutes. Control the amine value and viscosity, and add 10 kg of xylene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N while stirring until evenly mixed to obtain the B component.

[0127] Mix the A component and the B component in a ratio of 4:1 to obtain the heat insulation intermediate paint.

[0128] Preparation of the multifunctional polyether-modified polyaspartic ester of the heat-reflecting cooling topcoat: Under the protection of inert gas, 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred and heated to 75°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added. After the addition was completed, it was kept at 75°C for 3 hours, and then heated to 100°C and kept for 24 hours to obtain the multifunctional polyether-modified polyaspartic ester.

[0129] Preparation of heat reflective cooling top coat C component: 30 kg of 1753ss-70 hydroxyl acrylic resin, 10 kg of self-made multifunctional polyether modified polyaspartic ester resin, 10 kg of bifunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 500 rpm until mixed uniformly, the stirring speed was maintained, 0.5 kg of dispersant and 0.5 kg of thixotropic agent were added and stirred uniformly, 18 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, 30 kg of titanium dioxide (ALTIRIS 800 combined with R996 in a ratio of 1:2) and 5 kg of filler were slowly added, then 2 kg of solvent (a mixture of butyl acetate and xylene) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1500 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 65°C), then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.3 g of leveling agent BYK-320, 0.2 kg of defoaming agent BYK-066N and 1 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 800 rpm, the remaining solvent (a mixture of butyl acetate and xylene) was used to adjust the solid content and viscosity, and the heat reflective cooling top coat C component was obtained.

[0130] Preparation of heat reflective cooling top coat D component: 90 kg of curing agent (FEICURE GB 926-85 mixed with HI100 in a ratio of 1:3) was added into 1 kg of auxiliary and 8 kg of solvent (solvent was butyl acetate, auxiliary was OF produced by Bayer Company) under stirring at 500 rpm to obtain the heat reflective cooling top coat D component.

[0131] The C component and the D component were mixed in a ratio of 2:1 to obtain the heat reflective cooling top coat paint.

[0132] Example 8

[0133] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0134] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 2 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 300 rpm until mixed evenly. Keep the stirring speed and add 0.2 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA and stir until evenly mixed. Add 2 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 800 rpm, slowly add 3 kg of R996 titanium white, then wash the kettle wall with 1 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 1500 rpm, and the temperature of the dispersion reaches 55°C. Continue to disperse for 30 minutes (control temperature 55°C), and then add 25 kg of aerogel, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320, and the remaining solvent (a mixture of xylene and propylene glycol methyl ether) in the formula, stir until evenly mixed, and obtain the heat insulation intermediate paint A component.

[0135] Preparation of the amine-based composite curing agent prepolymer of the heat insulation intermediate paint B component: First, add 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin to the reaction kettle and stir at 500 rpm until evenly mixed. Add bisphenol A epoxy resin while stirring, stir until evenly mixed, seal, and let stand at room temperature overnight. Control the amine value and viscosity to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin is 5:1.

[0136] Preparation of the heat insulation intermediate paint B component: In 60 kg of the amine-based composite curing agent prepolymer, add 2 kg of accelerator NT1300 and stir at 500 rpm for 10 minutes. Control the amine value and viscosity, and add 10 kg of xylene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N while stirring until evenly mixed to obtain the B component.

[0137] Mix the A component and the B component in a ratio of 4:1 to obtain the heat insulation intermediate paint.

[0138] Preparation of the multifunctional polyether-modified polyaspartic ester of the heat-reflecting cooling topcoat: Under the protection of inert gas, 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred and heated to 75°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added. After the addition was completed, it was kept at 75°C for 3 hours, and then heated to 100°C and kept for 24 hours to obtain the multifunctional polyether-modified polyaspartic ester.

[0139] Preparation of heat reflective cooling top coat C component: 30 kg of 1753 ss-70 hydroxyl acrylic resin, 8 kg of self-made multifunctional polyether modified polyaspartic ester resin, 6 kg of difunctional polyaspartic ester resin WH420 were added into a reaction kettle, stirred at 500 rpm until mixed uniformly, 1.5 kg of dispersant and 1.5 kg of thixotropic agent were added and stirred uniformly, 17 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, 30 kg of titanium dioxide (ALTIRIS 800 and R996 combined in a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added, then 3 kg of solvent (a mixture of butyl acetate and xylene) was used to clean the wall of the reaction kettle, the stirring speed was increased to 1500 rpm, the temperature of the dispersion reached 55°C, and the dispersion was continued for 30 minutes (the temperature was controlled at 65°C), then it was transferred into a sand mill for grinding to a fineness of less than or equal to 30 μm, 0.5 g of leveling agent BYK-320, 0.5 kg of defoaming agent BYK-066N and 1 kg of ultraviolet light absorber BASF 292 were added at a stirring speed of 800 rpm, and the remaining solvent (a mixture of butyl acetate and xylene) was used to adjust the solid content and viscosity, to obtain the heat reflective cooling top coat C component.

[0140] Preparation of heat reflective cooling top coat D component: 80 kg of curing agent (FEICURE GB 926-85 mixed with HI100 in a ratio of 1:3) was added into 0.5 kg of auxiliary and 10 kg of solvent (solvent was butyl acetate, auxiliary was OF produced by Bayer Company) under stirring at 500 rpm, to obtain the heat reflective cooling top coat D component.

[0141] The C component and the D component were mixed in a ratio of 3:1 to obtain the heat reflective cooling top coat paint.

[0142] Example 9

[0143] The preparation method of the anticorrosive primer was consistent with that of Example 1.

[0144] Preparation of the heat insulation intermediate paint A component: 40 kg of 874 LX90 epoxy resin, 2 kg of liquid petroleum resin LA300 were first added to the reaction kettle, and stirred at 300 rpm until mixed evenly. Keep the stirring speed and add 0.2 kg of dispersant BYK-164 and 0.5 kg of thixotropic agent ULTRA and stir until evenly mixed. Add 2 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 800 rpm, slowly add 3 kg of R996 titanium white, then wash the kettle wall with 1 kg of solvent (a mixture of xylene and propylene glycol methyl ether), increase the stirring speed to 1500 rpm, and the temperature of the dispersion reaches 55°C. Continue to disperse for 30 minutes (control temperature 55°C), and then add 25 kg of aerogel, 1 kg of silane coupling agent OSF6040, 2 kg of active diluent glycidyl ester E10P, 0.3 kg of leveling agent BYK-320, and the remaining solvent (a mixture of xylene and propylene glycol methyl ether) in the formula, stir until evenly mixed, and obtain the heat insulation intermediate paint A component.

[0145] Preparation of the amine-based composite curing agent prepolymer of the heat insulation intermediate paint B component: First, add 3 kg of solvent (a mixture of xylene and n-butanol) and polyamide resin to the reaction kettle and stir at 500 rpm until evenly mixed. While stirring, add bisphenol A epoxy resin, stir until evenly mixed, seal, and let stand at room temperature overnight. Control the amine value and viscosity to obtain the B component prepolymer. The mass ratio of polyamide resin NT-1544 to bisphenol A epoxy resin E20 resin is 5:1.

[0146] Preparation of the heat insulation intermediate paint B component: In 60 kg of the amine-based composite curing agent prepolymer, add 2 kg of accelerator NT1300 and stir at 500 rpm for 10 minutes. Control the amine value and viscosity, and while stirring, add 10 kg of xylene and n-butanol mixture solvent and 1 kg of defoaming agent BYK066N. Stir until evenly mixed to obtain the B component.

[0147] Mix the A component and the B component in a ratio of 4:1 to obtain the heat insulation intermediate paint.

[0148] Preparation of the multifunctional polyether-modified polyaspartic ester of the heat-reflecting cooling topcoat: Under the protection of inert gas, 20 parts of polyether amine and 0.5 parts of triethylamine catalyst were stirred and heated to 75°C. Under stirring conditions, 10 parts of maleic acid dibutyl ester was added. After the addition was completed, it was kept at 75°C for 3 hours, and then heated to 100°C and kept for 24 hours to obtain the multifunctional polyether-modified polyaspartic ester.

[0149] Preparation of the heat-reflecting cooling topcoat C component: 25 kg of 1753ss-70 hydroxyl acrylic resin, 7 kg of self-made multifunctional polyether-modified polyaspartic ester resin, and 9 kg of bifunctional polyaspartic ester resin WH420 were added to a reaction kettle and stirred at 500 rpm until mixed uniformly. While maintaining the stirring speed, 1 kg of dispersant and 1 kg of thixotropic agent were added and stirred until mixed uniformly. Then, 24 kg of solvent (a mixture of butyl acetate and xylene) was added, the stirring speed was increased to 800 rpm, and 25 kg of titanium dioxide (ALTIRIS 800 combined with R996 at a ratio of 1:2) and 5 kg of barium sulfate filler were slowly added. Then, 1 kg of solvent (a mixture of butyl acetate and xylene) was used to clean the walls of the reaction kettle, the stirring speed was increased to 1500 rpm, and the temperature of the dispersion reached 55°C. The dispersion was continuously dispersed for 30 minutes (temperature controlled at 65°C), and then transferred to a sand mill for grinding to a fineness of less than or equal to 30 μm. At a stirring speed of 800 rpm, 0.5 g of leveling agent BYK-320, 0.5 kg of defoaming agent BYK-066N, and 0.5 kg of ultraviolet light absorber BASF 292 were added. The remaining solvent (a mixture of butyl acetate and xylene) in the formulation was used to adjust the solid content and viscosity, and the heat-reflecting cooling topcoat C component was obtained.

[0150] Preparation of the heat-reflecting cooling topcoat D component: 70 kg of curing agent (FEICURE GB 926-85 mixed with HI100 at a ratio of 1:3) was added to 0.5 kg of auxiliary agent and 5 kg of solvent (solvent: butyl acetate; auxiliary agent: OF produced by Bayer) under stirring at 500 rpm to obtain the heat-reflecting cooling topcoat D component.

[0151] The C component and the D component were mixed at a ratio of 4:1 to obtain the heat-reflecting cooling topcoat paint.

[0152] To further illustrate the key points of the present patent, a comparative example is provided for illustration.

[0153] Comparative Example 1

[0154] The preparation method and reaction conditions were basically the same as those of Example 1, except that no liquid petroleum resin LA300 was added to the A component.

[0155] Comparative Example 2

[0156] The preparation method and reaction conditions were basically the same as those of Example 1, except that the ratio of NT-1544 to E20 resin was 5:2 when preparing the amine-based composite curing agent prepolymer in the B component.

[0157] Comparative Example 3

[0158] The preparation method and reaction conditions were basically the same as those of Example 2, except that 50 kg of aerogel was added to the A component.

[0159] Comparative Example 4

[0160] The preparation method and reaction conditions are basically consistent with Example 2, wherein 175 LX90 epoxy resin is used in the A component.

[0161] Comparative Example 5

[0162] The preparation method and reaction conditions are basically consistent with Example 3, wherein 30 kg of 874 LX90 epoxy resin is added to the A component.

[0163] Comparative Example 6

[0164] The preparation method and reaction conditions are basically consistent with Example 3, wherein the thixotropic agent in the A component is replaced by MT instead of ULTRA.

[0165] Comparative Example 7

[0166] The preparation method and reaction conditions are basically consistent with Example 4, wherein the amine composite curing agent prepolymer is prepared by using 305-70X and E20 resin for preparation in the B component.

[0167] Comparative Example 8

[0168] The preparation method and reaction conditions are basically consistent with Example 4, wherein the amine composite curing agent prepolymer (NT-1544 combined with E20 resin) is replaced by amine curing agent NT-1544 in the B component.

[0169] Comparative Example 9

[0170] The preparation method and reaction conditions are basically consistent with Example 5, wherein 30 kg of aerogel is replaced by 20 kg of aerogel and 10 kg of hollow microbeads in the A component.

[0171] Comparative Example 10

[0172] The preparation method and reaction conditions are basically consistent with Example 5, wherein no active diluent glycidyl ester E10P is added in the A component.

[0173] Comparative Example 11

[0174] The preparation method and reaction conditions are basically consistent with Example 1, wherein no self-made multifunctional polyether modified polyaspartic ester resin is added in the C component.

[0175] Comparative Example 12

[0176] The preparation method and reaction conditions are basically consistent with Example 1, wherein no difunctional polyaspartic ester resin WH420 is added in the C component.

[0177] Comparative Example 13

[0178] The preparation method and reaction conditions are basically the same as those of Example 7, wherein the ultraviolet light absorber is not added in the C component.

[0179] Comparative Example 14

[0180] The preparation method and reaction conditions are basically the same as those of Example 7, wherein the combination of ALTIRIS 800 and R996 in the titanium dioxide in the C component is replaced from 1:2 to 1:3.

[0181] Comparative Example 15

[0182] The preparation method and reaction conditions are basically the same as those of Example 8, wherein the weight of the curing agent added in the D component is replaced from 80 kg to 60 kg.

[0183] Comparative Example 16

[0184] The preparation method and reaction conditions are basically the same as those of Example 8, wherein the 1753ss-70 hydroxyl acrylic resin in the C component is replaced by 2100ss-80 hydroxyl acrylic resin.

[0185] Comparative Example 17

[0186] The preparation method and reaction conditions are basically the same as those of Example 9, wherein 70 kg of curing agent is added in the D component, and the mixing ratio of FEICURE GB 926-85 and HI100 is replaced from 1:3 to 1:2.

[0187] The coatings prepared in the above examples and comparative examples are tested for performance, and the spraying sequence of the coatings is as follows: after the primer is sprayed and naturally dried for 24 hours, the thermal insulation intermediate paint is sprayed, and after the thermal insulation intermediate paint is dried for 24 hours, the heat-reflecting and cooling topcoat is sprayed. The performance is tested 7 days after the topcoat is sprayed (except for workability). The performance test results are shown in Table 1. The performance test standards are as follows: the reflectivity is not less than 0.67 in the visible light band (0.38 μm-0.78 μm), and the reflectivity is not less than 0.8 in the near-infrared band (0.78 μm-2.5 μm) according to the method of Appendix B of GJB6685-2009; the hemispherical emittance is not less than 0.85 according to 4.5.19 of GJB6685A-2020; the thermal conductivity is not greater than 0.05 W / (m.K) according to the provisions of GB / T 10297-2015; the thermal insulation is detected according to Appendix A of HG / T4341-2012, and the back surface temperature of the reflective thermal insulation layer material is not greater than 50℃; the flexibility is not greater than 2 mm according to 4.5.12 of GJB6685A-2020; and the aging resistance is greater than or equal to 3000 h according to GB / T 1865-2009.

[0188] Table 1 Performance Test Results

[0189]

[0190]

[0191]

[0192] From Table 1, it can be seen that the heat insulation, heat reflection and cooling combined coating prepared in Examples 1-9 has good performance, can be applied at -5℃, has a reflectivity of not less than 0.67 in the visible light wave band (0.38 μm-0.78 μm), has a reflectivity of not less than 0.8 in the near-infrared wave band (0.78 μm-2.5 μm), has a hemispherical emissivity of not less than 0.85, has a thermal conductivity of not more than 0.05 W / (m.K), has a back temperature of the roller-applied, heat-reflecting and heat-insulating layer material of not more than 50℃, has a flexibility of not more than 2 mm, and has an aging resistance of more than 3000 h.

[0193] Comparing the examples with the comparative examples, it can be seen that:

[0194] In Comparative Example 1, the brush-applied appearance is uneven; in Comparative Example 2, the heat-insulating and heat-preserving intermediate paint B component appears to be gelled; in Comparative Example 3, the flexibility and aging resistance are both unqualified; in Comparative Example 4, the spray-applied construction at -5℃ is too slow; in Comparative Example 5, the flexibility is unqualified; in Comparative Example 6, the construction appears to be sagging; in Comparative Example 7, the heat-insulating and heat-preserving coating cannot be applied at -5℃; in Comparative Example 8, the heat-insulating and heat-preserving coating cannot be applied at -5℃ and the flexibility is unqualified; in Comparative Example 9, the paint film surface is rough, and the solar reflectivity, thermal conductivity, and back temperature are all unqualified; in Comparative Example 10, the brush-applied appearance is uneven; in Comparative Example 11, the flexibility is unqualified; in Comparative Example 12, the aging resistance is unqualified; in Comparative Example 13, the aging resistance is unqualified; in Comparative Example 14, the solar reflectivity, hemispherical emissivity, and back temperature are all unqualified; in Comparative Example 15, the aging resistance is unqualified; in Comparative Example 16, the topcoat cannot be applied at -5℃ and the aging resistance is unqualified; and in Comparative Example 17, the flexibility is unqualified.

[0195] Through the above analysis, it can be obtained that the application provides a combined coating for heat insulation, heat reflection and cooling, which comprises an anti-corrosion primer, a heat insulation intermediate coating and a heat reflection top coating; for the heat insulation intermediate coating, a low-viscosity flexible modified modified bisphenol A epoxy resin is used in the preparation process, which is beneficial to the preparation of high solid content coating and helps to increase the flexibility of the coating, and the use of petroleum resin can improve the wettability of the coating to the primer and the interlayer adhesion between the coating and the primer and the top coating; the amine composite curing agent prepolymer prepared by pre-polymerization of polyamide and E20 epoxy resin in the B component, not only speeds up the drying speed of the coating and solves the problem of difficult construction in winter, but also further improves the anti-cracking property of the coating; the heat insulation filler only uses aerogel, which not only has good heat insulation effect, but also does not need a large amount of use, further ensuring the anti-cracking property of the coating.

[0196] For the heat reflection and cooling coating, after adding the self-made polyetherized multifunctional polyaspartate resin to the hydroxyl acrylic resin in the C component, the dual-function polyaspartate resin is matched, which not only ensures the drying speed of the coating, solves the problem of difficult construction in winter, but also ensures the flexibility of the coating, improves the anti-cracking property of the coating, and ensures the aging resistance of the coating; in addition, by using titanium white, the flatness and hiding power of the coating are ensured, and the solar reflectance and hemispherical emissivity of the product are ensured; the D component of the coating uses a polyisocyanate polymer, which uses a flexible curing agent matched with a fast-drying curing agent, which further ensures the flexibility and winter workability of the coating. The combined coating uses a heat reflection top coating matched with a heat insulation coating, which not only ensures the heat insulation effect of the coating, but also ensures the appearance and aging resistance of the coating.

[0197] By combining the use of the anti-corrosion primer, the heat insulation intermediate coating and the heat reflection and cooling top coating, the combined coating has a wide construction window and excellent construction effect in all seasons.

[0198] The above is only the preferred embodiment of the application and the technical principle applied, and those skilled in the art will understand that the application is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the scope of the application. Therefore, although the application has been described in more detail through the above embodiments, the application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the application, and the scope of the application is determined by the scope of the appended claims.

Claims

1. A combined paint for thermal insulation, heat reflection and cooling, characterized in that, The coating composition comprises a corrosion-resistant primer, a heat-insulating intermediate coating, and a heat-reflecting top coating. The heat-insulating intermediate coating comprises an A component and a B component in a weight ratio of (3-5):

1. The A component comprises the following raw materials in parts by weight: 40-60 parts of modified bisphenol A epoxy resin, 2-8 parts of petroleum resin, 0.2-0.5 parts of a first dispersing agent, 0.5-1.5 parts of a first thixotropic agent, 3-8 parts of coloring pigment, 25-35 parts of aerogel, 0.5-1.5 parts of silane coupling agent, 1-3 parts of active diluent, 3-10 parts of a first solvent, and 0.2-0.5 parts of a first leveling agent. The B component comprises the following raw materials in parts by weight: 60-90 parts of an amine-based composite curing agent prepolymer, 0-10 parts of a second solvent, 2-5 parts of an accelerator, and 1-2 parts of a first defoaming agent. The heat-reflecting top coating comprises a C component and a D component in a weight ratio of (2-4):

1. The C component comprises the following raw materials in parts by weight: 20-40 parts of hydroxy acrylate resin, 5-10 parts of multifunctional polyether-modified polyaspartic ester resin, 5-10 parts of difunctional polyaspartic ester resin, 0.5-1.5 parts of a second dispersing agent, 10-25 parts of a third solvent, 0.5-1.5 parts of a second thixotropic agent, 20-35 parts of titanium white, 5-15 parts of filler, 0.2-0.5 parts of a second leveling agent, 0.2-0.5 parts of a second defoaming agent, and 0.2-1 parts of ultraviolet light absorber. The D component comprises the following raw materials in parts by weight: 70-100 parts of polyisocyanate polymer, 0-10 parts of a fourth solvent, and 0-1 parts of an auxiliary agent. The preparation method of the amine-based composite curing agent prepolymer comprises: The second solvent and the polyamide resin are added to a reaction kettle and stirred uniformly at a first rotating speed, and the bisphenol A epoxy resin is added while stirring, and the mixture is sealed and placed after uniform stirring, and the amine value and viscosity are controlled to obtain the amine-based composite curing agent prepolymer. The weight ratio of the polyamide resin to the bisphenol A epoxy resin is 5:1, and the bisphenol A epoxy resin comprises E20 epoxy resin. The preparation method of the multifunctional polyether-modified polyaspartic ester resin comprises: Under the protection of inert gas, the multifunctional polyether amine is stirred with a catalyst, and the temperature is raised to 65-75℃, and the multifunctional polyether-modified polyaspartic ester resin is obtained by adding maleate under stirring at 65-75℃ for 2-3 hours, raising the temperature to 85-100℃ and keeping the temperature for 16-24 hours.

2. The combined paint for thermal and solar heat shielding and reflecting according to claim 1, wherein The modified bisphenol A epoxy resin comprises one or more of Guodou 175LX90, SM172X75, and Hansen Resin 874LX90.

3. The combined paint for thermal and solar heat shielding and reflecting according to claim 1, wherein The petroleum resin comprises one of C9 liquid petroleum resin and C10 liquid petroleum resin, and specifically comprises one or more of Novares LA300, LA700, and LA1200.

4. The combined paint for thermal and solar heat shielding and reflecting according to claim 1, wherein The polyisocyanate polymer includes one or more of FEICURE GB 926-85, FEICURE GB 905A-85, FEICURE GB 605A-100, HT100, HI100, and Desmodur N3800.

5. A method for preparing a combined coating for thermal insulation, heat reflection and cooling, characterized in that, The combined coating for thermal insulation, heat reflection and cooling according to any one of claims 1-4, comprising the following steps: The modified bisphenol A epoxy resin and the petroleum resin are added into a reaction kettle in parts by weight, stirred at a first rotating speed until mixed uniformly, the first dispersing agent and the first thixotropic agent are added while stirring uniformly, a preset amount of the first solvent is added, the first rotating speed is increased to a second rotating speed, the coloring pigment is slowly added, the reaction kettle wall is washed with a preset amount of the first solvent, the rotating speed is increased to a third rotating speed, when the temperature of the reaction solution reaches a preset temperature, the first preset time is continued, the aerogel, the silane coupling agent, the active diluent, the first leveling agent and the remaining first solvent are added at the second rotating speed, and stirring is uniform to obtain component A; The promoter is added into the amine-based composite curing agent prepolymer in parts by weight, stirred at the first rotating speed for a second preset time, the amine value and the viscosity of the amine-based composite curing agent prepolymer are controlled, and the second solvent and the first defoaming agent are added while stirring to obtain component B; The A component and the B component are mixed in a weight ratio of (3-5): 1 to obtain a thermal insulation intermediate paint; The hydroxyl acrylate resin, the multifunctional polyether modified polyaspartic ester resin and the difunctional polyaspartic ester resin are added into a reaction kettle in parts by weight, stirred at a first rotating speed until mixed uniformly, the second dispersing agent and the second thixotropic agent are added while stirring uniformly, a preset amount of the third solvent is added, the rotating speed is increased to a second rotating speed, titanium dioxide and fillers are slowly added, and then part of the third solvent is used to wash the reaction kettle wall, the rotating speed is increased to a third rotating speed, the temperature of the dispersion liquid reaches a preset temperature, the first preset time is continued, and then it is transferred to a sand mill for grinding to a target particle size, the second leveling agent, the second defoaming agent and the ultraviolet light absorber are added at a second rotating speed, the remaining third solvent is used to adjust the solid content and the viscosity to obtain component C; The polyisocyanate polymer is added into the first rotating speed stirring condition, the auxiliary agent and the fourth solvent are added to obtain component D; The C component and the D component are mixed in a weight ratio of (2-4): 1 to obtain a heat reflection and cooling topcoat.

6. The method for preparing a combined coating for thermal insulation, heat reflection and cooling according to claim 5, characterized in that, The weight parts of the multifunctional polyether amine is 20-40 parts, the weight parts of the catalyst is 0.01-0.5 parts, and the weight parts of the maleate is 10-30 parts. The multifunctional polyether amine is an amino-terminated compound containing polyethylene glycol, polypropylene glycol or polytetrahydrofuran segments; the catalyst includes one or more of triethylamine, N,N-dimethylcyclohexylamine, triethylenediamine; the maleate includes one or more of dimethyl maleate, diethyl maleate, dipropyl maleate, dibutyl maleate and diisooctyl maleate.

7. The method for preparing a combined coating for thermal insulation, heat reflection and cooling according to claim 5, characterized in that, The first rotation speed is 300-500 rpm, the second rotation speed is 600-800 rpm, the third rotation speed is 1200-1500 rpm, the preset temperature is 55-65℃, the first preset time is 20-30 minutes, the second preset time is 5-15 minutes, and the target particle size is less than or equal to 30μm.

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