A kind of infrared low emissivity coating containing graphene
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A low emissivity, graphene technology, applied in camouflage paints, conductive paints, coatings, etc., can solve problems such as poor continuity of metallic pigments, and achieve the effect of reducing emissivity, reducing infrared radiation intensity, and reducing dosage
Active Publication Date: 2020-11-13
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to overcome the problem of poor continuity of metallic pigments and provide a highly durable low infrared emissivity metallic coating
Method used
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Embodiment 1
[0042] According to the above method, 34g flake floating aluminum powder, 0.5g modified graphene, 50g hydroxyl acrylic resin, 1.2g titanium dioxide, 2.5ml butyl acetate, 0.5g thixotropic agent, 0.6g defoamer, 0.5g disperse solvent, 7ml xylene and 7ml cyclohexanone to make a coating.
Embodiment 2
[0044] According to the above method, 33g flake floating aluminum powder, 1g modified graphene, 50g hydroxyacrylic resin, 1.2g titanium dioxide, 2.5ml butyl acetate, 0.5g thixotropic agent, 0.6g defoamer, 0.5g dispersant , 7ml xylene and 7ml cyclohexanone to make a coating.
Embodiment 3
[0046] According to the above method, 32g flake floating aluminum powder, 1.5g modified graphene, 50g hydroxy acrylic resin, 1.2g titanium dioxide, 2.5ml butyl acetate, 0.5g thixotropic agent, 0.6g defoamer, 0.5g disperse solvent, 7ml xylene and 7ml cyclohexanone to make a coating.
[0047] Add an aliphatic isocyanate curing agent to the coating prepared in Examples 1-3, disperse and mix evenly at a high speed, spray it on a clean tinplate with a spray gun, and place it in an oven for 60 Dry at ~80°C for 6 hours to form a coating. After the blackbody temperature of the infrared emissivity tester is stabilized at 80 °C, install an 8-14 μm filter, and after instrument calibration, measure the infrared emissivity of the coating in the range of 8-14 μm.
[0048] The properties of coatings measured by national standards are shown in the table below:
[0049]
[0050] The addition of floating aluminum powder is selected as 35% of the coating weight, and the addition of modified...
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Abstract
The invention relates to a graphene-containing infrared low-emissivity coating. Resin serves as a base material, floating aluminum powder serves as metal pigment, and modified graphene which is dopedamong the floating aluminum powder to serve as a bridging component among the floating aluminum powder granules is dispersed in the coating, wherein the weight percentage of the adding amount of the modified graphene and the floating aluminum powder in the coating is as follows: 0.1 to 10 percent of the modified graphene and 15 to 35 percent of the floating sheet-like aluminum powder. The modifiedgraphene is added into the pure metal coating and then is distributed among metal powder fragments, and the bridging effect among the aluminum powder pigment fragments is achieved by utilizing the high electric conductivity, so that the whole electric conductivity of the coating is improved and the emissivity is reduced. Meanwhile, the infrared low-emissivity coating with low emissivity and low surface density, which is prepared by taking high-elasticity and high-toughness resin as a base material, can be applied to the parts, with remarkable infrared characteristic signals, of weapons such as surface ships and can effectively reduce the infrared radiation intensity of the ships.
Description
technical field [0001] The invention relates to an infrared stealth coating, in particular to a graphene-containing infrared low emissivity coating. Background technique [0002] Metal powders are mostly used as low-emissivity pigments and fillers in traditional infrared stealth coatings, and metal pigments play a decisive role in reducing the infrared emissivity of coatings. However, since the metal powder is distributed in the coating in the form of fragments, the distribution of the metal powder fragments is discontinuous, and the gaps between the fragments will affect the overall conductivity and strength of the coating. Moreover, when a large amount of metallic pigments are added to the coating, the prepared low-emissivity coating has the disadvantages of poor continuity of metallic pigments, heavy weight, poor durability, and incompatibility with radar wave coatings, which cannot meet the needs of low infrared emissivity. The U.S. defense establishment has done a lot ...
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