Heat insulation coating containing rare earth and preparation method thereof

Abstract

The invention relates to the technical field of coatings, and provides a rare earth-containing adiabatic coating and a preparation method thereof.The rare earth-containing adiabatic coating is prepared from the following raw materials in parts by weight: 40-50 parts of acrylic resin, 4-6 parts of rosin modified maleic resin, 20-30 parts of titanium dioxide, 4-5 parts of a rare earth compound, 2-4 parts of a silane coupling agent, 1.5-3 parts of a coalescing agent and 15-20 parts of a solvent; the acid value of the rosin modified maleic acid resin is 25 to 30 mgKOH / g. According to the technical scheme, the problem of poor heat insulation effect of the heat insulation coating in the related technology is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paint, in particular, to a heat insulation paint containing rare earth and a preparation method thereof. BACKGROUND

[0002] Heat insulation paint, also known as thermal insulation paint, is a functional coating coated on the surface of a substrate, which can block heat transfer. It has the characteristics of lightness, convenience in construction, and adaptation to complex surfaces, and is widely used in the fields of building, industry, transportation, etc.

[0003] The core requirement of heat insulation paint is to reflect solar radiation heat. Compared with traditional titanium white, rare earth compounds can better improve the effect of reflecting solar radiation heat, but the cost of rare earth compounds is higher. Therefore, in order to improve the effect of reflecting solar radiation heat of heat insulation paint, rare earth compounds + titanium white are often used as heat insulation functional fillers.

[0004] However, the addition of heat insulation functional fillers in the preparation process of heat insulation paint will face the problem of agglomeration. Such heat insulation functional fillers are prone to form aggregated particles in the mixing process, which affects the heat insulation effect of the heat insulation paint. SUMMARY

[0005] The present application provides a heat insulation paint containing rare earth and a preparation method thereof, which solves the problem of low solar reflectance and atmospheric window emissivity in the related art.

[0006] The technical scheme of the present application is as follows: The present application provides a heat insulation paint containing rare earth, which comprises the following components by weight: 40-50 parts of acrylic resin, 4-6 parts of rosin modified maleic acid resin, 20-30 parts of titanium white, 4-5 parts of rare earth compound, 2-4 parts of silane coupling agent, 1.5-3 parts of film forming aid, and 15-20 parts of solvent. The acid value of the rosin modified maleic acid resin is 25-30 mgKOH / g.

[0007] As a further technical scheme, the rare earth oxide includes one or more of lanthanum oxide, cerium oxide, and samarium oxide.

[0008] As a further technical scheme, the raw material further comprises 1.5-3 parts of anhydride-containing compound, for example, 1.5 parts, 2 parts, 2.5 parts, or 3 parts, preferably 2 parts.

[0009] As a further technical scheme, the anhydride-containing compound includes one or both of 2,2'-diphenyl dicarboxylic anhydride and 4,4'-oxydibenzoic anhydride.

[0010] The inventors further add anhydride-containing compound to the heat break coating containing rare earth, and find that the addition of the anhydride-containing compound can not only better improve the dispersibility of titanium dioxide and rare earth oxide in the heat break coating and improve the processing performance, but also further improve the wear resistance of the heat break coating containing rare earth by further introducing 2,2'-biphenyl dicarboxylic anhydride or 4,4'-oxydiphthalic anhydride as the anhydride-containing compound.

[0011] As a further technical solution, when the anhydride-containing compound comprises 2,2'-biphenyl dicarboxylic anhydride and 4,4'-oxydiphthalic anhydride, the mass ratio of the 2,2'-biphenyl dicarboxylic anhydride and 4,4'-oxydiphthalic anhydride is 0.5-2:1, for example, it can be 0.5:1, 1:1, 1.5:1, 2:1.

[0012] In the present application, when the anhydride-containing compound consists of 2,2'-biphenyl dicarboxylic anhydride and 4,4'-oxydiphthalic anhydride, the wear resistance of the heat break coating containing rare earth can be better improved, and its effect is better than that of adding 2,2'-biphenyl dicarboxylic anhydride or 4,4'-oxydiphthalic anhydride alone, therefore, the co-addition of 2,2'-biphenyl dicarboxylic anhydride and 4,4'-oxydiphthalic anhydride as the anhydride-containing compound can have a synergistic effect of improving wear resistance.

[0013] As a further technical solution, the silane coupling agent comprises one or more of silane coupling agent KH-550, silane coupling agent KH-560, and silane coupling agent KH-580.

[0014] As a further technical solution, the solvent comprises isobutyl alcohol.

[0015] As a further technical solution, the particle size of the titanium dioxide is 0.3-0.65 μm, for example, it can be 0.3 μm, 0.4 μm, 0.65 μm.

[0016] As a further technical solution, the raw material further comprises 0.5-3.5 parts of an auxiliary agent, and the auxiliary agent can be 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, or 3.5 parts.

[0017] As a further technical solution, the auxiliary agent comprises one or more of defoaming agent, anti-settling agent, lubricant, antioxidant, and leveling agent.

[0018] As a further technical solution, the antioxidant comprises one or more of antioxidant 1010, antioxidant 168, and antioxidant 1076.

[0019] The application further provides a preparation method of the heat-breaking coating containing rare earth.

[0020] The application has the following working principles and advantages: In the application, rosin modified marlin acid resin, titanium white, rare earth oxide and silane coupling agent are added to the acrylic resin, wherein the rosin modified marlin acid resin improves the heat-breaking effect of the heat-breaking coating containing rare earth. In the preparation process of the heat-breaking coating, the carboxyl in the rosin modified marlin acid resin can form hydrogen bond force with the hydroxyl on the surface of the titanium white and the rare earth oxide, thereby improving the dispersibility of the titanium white and the rare earth oxide in the heat-breaking coating, reducing the agglomeration in the preparation process, fully exerting the heat-breaking effect of the titanium white and the rare earth oxide, and ensuring the high bonding strength of the heat-breaking coating. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work are within the protection scope of the application.

[0022] In the following examples and comparative examples: Acrylic resin: hydroxyl acrylic resin emulsion, model 24, manufacturer Shandong Shengjing New Material Technology Co., Ltd.; Rosin modified marlin acid resin: product name: alcohol-soluble marlin acid resin, article number: BM03-AT, acid value (mgKOH / g): 25-30, purchased from Shenzhen Jiyida Chemical Co., Ltd. Titanium white: average particle size 0.3 μm; lanthanum oxide: average particle size 3-5 μm.

[0023] Example 1 A heat-breaking coating containing rare earth comprises the following components by weight: acrylic resin 40 parts, rosin modified marlin acid resin 4 parts, titanium white 20 parts, lanthanum oxide 4 parts, silane coupling agent KH-550 2 parts, film-forming aid Loxanol@CA5308 1.5 parts, isobutyl alcohol 15 parts, BYK-065 defoaming agent 0.5 parts, and antioxidant 1010 0.5 parts. A preparation method of the heat-breaking coating containing rare earth comprises the following steps: mixing the above-mentioned components of the heat-breaking coating containing rare earth to obtain the heat-breaking coating containing rare earth.

[0024] Example 2 A rare earth-containing heat break coating, comprising the following components by weight: acrylic resin 50 parts, rosin modified maleic resin 6 parts, titanium white 30 parts, lanthanum oxide 5 parts, silane coupling agent KH-550 4 parts, film forming aid Loxanol@CA 5308 3 parts, isobutyl alcohol 20 parts, BYK-065 defoaming agent 0.5 parts, antioxidant 1010 0.5 parts; A preparation method of a rare earth-containing heat break coating, comprising the following steps: uniformly mixing the above-mentioned raw materials of the rare earth-containing heat break coating to obtain the rare earth-containing heat break coating.

[0025] Example 3 Compared with Example 1, the difference of the present embodiment is only that the rosin modified maleic resin is 5 parts.

[0026] Example 4 Compared with Example 1, the difference of the present embodiment is only that the rosin modified maleic resin is 6 parts.

[0027] Example 5 Compared with Example 1, the difference of the present embodiment is only that a rare earth-containing heat break coating of the present embodiment, comprising the following components by weight: acrylic resin 40 parts, rosin modified maleic resin 4 parts, titanium white 20 parts, lanthanum oxide 4 parts, silane coupling agent KH-550 2 parts, film forming aid Loxanol@CA 5308 1.5 parts, isobutyl alcohol 15 parts, BYK-065 defoaming agent 0.5 parts, antioxidant 1010 0.5 parts, 2,2'-biphenyl dicarboxylic anhydride 2 parts.

[0028] Example 6 Compared with Example 5, the difference of the present embodiment is only that the 2,2'-biphenyl dicarboxylic anhydride is replaced by an equal amount of 4,4'-oxydiphthalic anhydride.

[0029] Example 7 Compared with Example 5, the difference of the present embodiment is only that the 2,2'-biphenyl dicarboxylic anhydride is replaced by 4,4'-oxydiphthalic anhydride with a mass ratio of 2:1 of 2,2'-biphenyl dicarboxylic anhydride.

[0030] Example 8 Compared with Example 5, the difference of the present embodiment is only that the 2,2'-biphenyl dicarboxylic anhydride is replaced by 4,4'-oxydiphthalic anhydride with a mass ratio of 1:2 of 2,2'-biphenyl dicarboxylic anhydride.

[0031] Example 9 Compared with Example 5, the difference of the present embodiment is only that the 2,2'-biphenyl dicarboxylic anhydride is replaced by an equal amount of silane coupling agent KH-550.

[0032] Comparative Example 1 The difference between the comparative example and Example 1 is only that the rosin modified maleic acid resin is not added.

[0033] Experimental Example 1 The heat insulation coatings containing rare earth prepared by the above Examples 1-4 and Comparative Example 1 were respectively coated on a substrate to form a heat insulation coating layer, and the dry film thickness of the coating layer was controlled to be 0.5 mm, and then the solar reflectance and the atmospheric window emissivity were respectively measured; (1) The measurement of the solar reflectance was specifically as follows: the reflectivity of the coating layer was measured by a UV-visible-near infrared spectrophotometer Lambda 950 at an incident angle of 5°, and the wavelength range was 0.3-2.5 μm; the measurement results are shown in Table 1. (2) The measurement of the atmospheric window emissivity was specifically as follows: the atmospheric window emissivity of the coating layer was measured by an IR-2 dual-band emissivity tester, and the wavelength range was 8-13 μm. The measurement results are shown in Table 1.

[0034] Table 1 Heat insulation properties of the heat insulation coatings containing rare earth in Examples 1-4 and Comparative Example 1

[0035] As shown in Table 1, the heat insulation properties of the heat insulation coatings containing rare earth in Examples 1-4 are all higher than that of Comparative Example 1, which indicates that the addition of the rosin modified maleic acid resin in the present application can improve the heat insulation properties of the heat insulation coatings containing rare earth.

[0036] Experimental Example 2 The heat insulation coatings containing rare earth in the above Examples 1, 5-9 were respectively coated on the upper surface of a polypropylene substrate (coating thickness was 30 μm), and after curing, the abrasion resistance was measured according to the measurement method in GB / T 1768-2006 “Colour Paint and Varnish-Determination of Abrasion Resistance-Rotating Rubber Wheel Method” (experimental conditions: load 1 Kg, 1000 r, CS-10 abrasive wheel), and the measurement results are shown in Table 2.

[0037] Table 2 Abrasion resistance of the heat insulation coatings containing rare earth in Example 1, Examples 5-9

[0038] As shown in Table 2, the abrasion resistance of the heat insulation coatings containing rare earth in Examples 7-8 of the present application is higher than that of Example 1, Example 5, Example 6 and Example 9, which indicates that the addition of the anhydride-containing compound composed of 2,2'-diphenyl dicarboxylic anhydride and 4,4'-oxydiphthalic anhydride in the present application can further improve the abrasion resistance of the heat insulation coatings containing rare earth.

[0039] Experimental Example 3 The rare earth-containing thermal break coatings prepared in Examples 1-9 were determined for the adhesion strength under standard conditions according to the determination method in JCT 864-2023 “Polymer emulsion building waterproof coating”, and the determination results are shown in Table 3.

[0040] Table 3 Performance determination results of the rare earth-containing thermal break coatings in Examples 1-9

[0041] As shown in Table 3, the adhesion strength of the rare earth-containing thermal break coatings in Examples 1-9 meets the requirements of JCT 864-2023 for the adhesion strength of the coatings.

[0042] Experimental Example 4 The cooling effect of the rare earth-containing thermal break coatings in Examples 1-9 was determined as follows: black magnetic paint and the rare earth-containing thermal break coatings were coated on aluminum sheets, with a dry film thickness of 400 μm, and after being fixed at room temperature, the coatings were irradiated with a 500 W infrared lamp to simulate sunlight, the temperature of the black magnetic paint was controlled within the range of (37±1)℃ by adjusting the distance between the infrared lamp and the test plate, the temperature of the back of the test plate (T1) and the temperature of the upper surface of the coating (T2) were detected with a surface thermometer, and the data were recorded every 10 min until the temperature was stable, the cooling temperature (△T) was calculated by the formula △T=T2-T1, and the determination results are shown in Table 4.

[0043] Table 4 Performance determination results of the rare earth-containing thermal break coatings in Examples 1-9

[0044] As shown in Table 4, the cooling effect of the rare earth-containing thermal break coatings in Examples 1-9 is good.

[0045] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat-shielding coating containing rare earth, characterized by, The raw material comprises the following components by weight: acrylic resin 40-50 parts, rosin modified marlin acid resin 4-6 parts, titanium white powder 20-30 parts, rare earth compound 4-5 parts, silane coupling agent 2-4 parts, film forming aid 1.5-3 parts, solvent 15-20 parts; the acid value of the rosin modified marlin acid resin is 25-30 mgKOH / g.

2. The heat shield paint containing rare earth according to claim 1, characterized by, The rare earth oxide comprises one or more of lanthanum oxide, cerium oxide and samarium oxide.

3. The heat shield paint containing rare earth according to claim 1, characterized by, The raw material further comprises 1.5-3 parts of anhydride-containing compound.

4. The heat shield paint containing rare earth according to claim 3, characterized by, The anhydride-containing compound comprises one or both of 2,2'-diphenyl dicarboxylic anhydride and 4,4'-oxy bis phthalic anhydride.

5. The heat shield paint containing rare earth according to claim 1, wherein The silane coupling agent comprises one or more of silane coupling agent KH-550, silane coupling agent KH-560 and silane coupling agent KH-580.

6. The heat shield paint containing rare earth according to claim 1, wherein The particle size of the titanium white powder is 0.3-0.65 μm.

7. The heat shield paint containing rare earth according to claim 1, wherein The raw material further comprises 0.5-3.5 parts of an aid.

8. The heat shield paint containing rare earth according to claim 7, characterized by, The aid comprises one or more of defoaming agent, anti-settling agent, lubricant, antioxidant and leveling agent.

9. The heat shield paint containing rare earth according to claim 8, characterized by, The antioxidant comprises one or more of antioxidant 1010, antioxidant 168 and antioxidant 1076.

10. A method for producing a rare earth-containing thermal barrier coating, for producing a rare earth-containing thermal barrier coating according to any one of claims 1 to 9, characterized in that The method comprises the following steps: After the raw material is mixed uniformly, a rare earth-containing thermal break coating is obtained.

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