WO2013032368A2 - Revêtement de protection thermique haute température - Google Patents

Revêtement de protection thermique haute température Download PDF

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Publication number
WO2013032368A2
WO2013032368A2 PCT/RU2012/000714 RU2012000714W WO2013032368A2 WO 2013032368 A2 WO2013032368 A2 WO 2013032368A2 RU 2012000714 W RU2012000714 W RU 2012000714W WO 2013032368 A2 WO2013032368 A2 WO 2013032368A2
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WIPO (PCT)
Prior art keywords
microspheres
diameter
wall thickness
binder
heat
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PCT/RU2012/000714
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English (en)
Russian (ru)
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WO2013032368A3 (fr
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Юрий Александрович ГРИГОРЬЕВ
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Общество С Ограниченной Ответственностью "Овк-Руссия"
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Publication of WO2013032368A2 publication Critical patent/WO2013032368A2/fr
Publication of WO2013032368A3 publication Critical patent/WO2013032368A3/fr

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Definitions

  • the invention relates to the production of heat-insulating coatings intended for structures and equipment operated in conditions of high temperatures and aggressive environments, and can be used in construction, engineering, chemical industry, transport, aviation, space and other industries.
  • Heat-resistant coatings are known containing hollow ceramic or glass microspheres, binders in the form of dispersions, emulsions of organosoluble organosilicon resins, acrylic copolymers, polyurethanes, which are used as heat-insulating material for the outer and inner surfaces of building envelopes and structures, pipelines and various technological equipment, for example, paint-coating according to patent RU N ° 2310670 C9, 20.11.2007.
  • this known coating is not applicable for structures and equipment operated under conditions of high temperatures and vibration loads and aggressive environments, due to the low resistance to their effects (operating temperature of the coating does not exceed 200 ° C).
  • the closest in technical essence and the achieved result is a heat-shielding coating containing vacuum (hollow) ceramic or corundum microspheres with a particle diameter of 3 to 100 microns and a bulk density of 300-400 kg / m 3 as a filler, organosilicon, polyether epoxy binder or acrylic dispersions and, as additives, the reflector is aluminum powder and pigment, in the following ratio of components, in wt.%: microspheres 55-70, binder 30-35, reflector - aluminum powder 2.0-5.0, pigment 0.1-0.6 according to patent RU -Nb 2245350 C1, 01/27/2005.
  • the heat-protective coating obtained by applying the known composition is uniform in composition and has a sufficiently high adhesion to the surface to be protected, however, it is not applicable to structures and equipment operated at high temperatures, vibration loads and aggressive environments, due to their low resistance to their effects (working the coating temperature does not exceed 250 ° C) and has insufficiently high thermophysical properties (thermal conductivity, thermal perception and heat transfer).
  • the technical result of the invention is to increase the heat-shielding and thermophysical properties of the coating, its resistance to high temperatures, vibration loads and aggressive media, expanding the range of operating temperatures of the coating while providing low thermal conductivity and high uniformity and adhesion of the coating to the substrate.
  • the heat-protective coating including hollow ceramic or corundum microspheres, a binder and water, as a binder contains one of the group comprising aluminoborophosphate, alumochromophosphate, potassium polytitanate, or a mixture of alumochromophosphate and potassium polytitanate, in the following ratio of components in mass %:
  • hollow ceramic or corundum microspheres 67 - 85 aluminoborphosphate or aluminochromophosphate or polytitanate
  • the thermal barrier coating contains aluminosilicate microspheres of fly ash with a diameter of 3-150 microns and a wall thickness of 1-6 microns.
  • heat-resistant coating contains glass-ceramic microspheres with a diameter of 3-100 microns and a wall thickness of 0.3 - 1.0 microns.
  • the thermal barrier coating contains microspheres with a diameter of 3-90 ⁇ m and a wall thickness of 0.5 - 3.0 ⁇ m.
  • compositions with the minimum allowable binder content are selected to cover the surfaces of structures and equipment operated at high operating temperatures.
  • Compositions with the maximum allowable binder content are selected to cover the surfaces of structures and equipment operated at high vibrations and mechanical loads.
  • hollow aluminosilicate microspheres of fly ash of thermal power plants or glass-ceramic or corundum microspheres in the claimed range of diameters and wall thicknesses obtained by evacuation (foaming) of ground glass-ceramic or corundum materials are used as a filler.
  • the materials of the microspheres are selected taking into account the high operating temperatures of the coating. Glass-ceramic microspheres are used for the operating temperature range up to 600 ° ⁇ , aluminosilicate microspheres are used up to 1400 ° ⁇ , corundum microspheres are up to 2000 ° ⁇ .
  • the diameter of the microspheres is selected in the range of 3 - 150 microns, commensurate with the long wavelength of thermal infrared radiation to ensure conditions for its maximum absorption by the microspheres.
  • the wall thickness of the microspheres in the range of 0.3-6 ⁇ m is selected taking into account the provision of the required strength of the material.
  • microspheres shape of the microspheres, their size and the selected distribution of microspheres by dispersion allow you to change the viscosity of the composition depending on its purpose with obtaining a heat-protective coating with high performance characteristics.
  • Preparation of the composition of the heat-shielding coating is carried out by mixing the initial composition in the dispersant.
  • the proposed coating can be applied to the surface of building structures made of metal, concrete, brick, as well as equipment of the chemical, aviation and railway industries, pipelines and ducts operated at temperatures from minus 60 ° C to plus 2000 ° C. Due to the high thermal properties of the proposed coating, it can be applied to surfaces with temperatures up to 300 ° C without stopping the operation of the equipment in operation.
  • the coating can be applied to the surface to be protected by any method used in the coating technology in the form of a single layer or several layers. Moreover, the thickness of the coating layer and depends on the nature of the surface, the conditions of the temperature regime of operation.
  • a high-temperature heat-shielding coating is firmly bonded to the base and has high performance characteristics.
  • the resulting coating retains high performance at high operating temperatures in the range from 300 to 2000 ° C.
  • Table 1 shows the recommended combinations of a binder and microspheres in the preparation heat-protective coating in accordance with the invention.
  • Tables 2, 3, 4, 5 show the qualitative and quantitative compositions of examples of the preparation of the proposed thermal barrier coating.
  • Table 6 shows the indicators of the properties of the thermal barrier coating for the compositions shown in tables 2-5.
  • the present invention allows to obtain coatings with high uniformity and adhesion strength, with high heat and thermal properties (low thermal conductivity, temperature resistance, chemical resistance, vibration resistance, abrasion resistance and electrical insulation resistance at high temperatures), which makes it possible to widely use it in construction, mechanical engineering, chemical, aviation and railway industries to ensure the protection of structures; Rui in conditions of high temperatures and corrosive environments.

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Abstract

L'invention concerne le domaine de la fabrication de revêtement de protection thermique destinés aux structures et équipements exploités dans des conditions de températures élevées et de milieux agressifs et peut s'utiliser en constructions mécaniques, dans le bâtiment, l'industrie chimique, dans les transports et des branches d'industrie aéronautique, cosmique et autres. Le revêtement de protection thermique pour températures élevée comprend des microsphères creuses en céramique ou en corindon, un liant et de l'eau; on utilise en tant que liant un élément du groupe comprenant le phosphate de bore d'alumine, le phosphate de chrome d'alumine, le polytitanate de potassium ou un mélange de phosphate de chrome d'alumine et de polytitanate de potassium avec un rapport de composants suivant, en % en masse : les microsphères mentionnées ci-dessous 67 à 85, le liant mentionné ci-dessous 10-30, l'eau constituant le reste. On utilise en tant que microsphères céramiques creuses un revêtement thermique protecteur contant des microsphères de silicates d'aluminium provenant de cendres volantes possédant un diamètre de 3 à 150 micromètres et une épaisseur de parois de 1 à 6 micromètres ou de microsphères vitrocéramiques possédant un diamètre de 3 à 100 micromètres et une épaisseur de parois de 0,3 à 1,0 micromètres et utilisant en tant que microsphères creuses de corindon des microsphères possédant un diamètre de 3 à 90 micromètres et une épaisseur de parois de 0,5 à 3,0 micromètres.
PCT/RU2012/000714 2011-08-31 2012-08-30 Revêtement de protection thermique haute température WO2013032368A2 (fr)

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RU2011136161/05A RU2482146C2 (ru) 2011-08-31 2011-08-31 Высокотемпературное теплозащитное покрытие
RU2011136161 2011-08-31

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RU2641933C1 (ru) * 2017-06-27 2018-01-23 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Композиция для получения теплоизоляционных изделий
IT201700014108A1 (it) * 2017-02-09 2018-08-09 Ludovici Raffaele E Figli S R L Microsfere ceramiche cave di silicio con additivi fotocatalitici, antimuffa, antibatterici, attivi nello spettro UV, anti-inquinamento, assorbitori di odori per vernici ed idropitture
CN112159241A (zh) * 2020-10-09 2021-01-01 邢台德勤工矿工程有限公司 一种刚玉-铝硅酸盐复合耐火材料及其制备方法和应用
CN114163883A (zh) * 2021-12-09 2022-03-11 中国铝业股份有限公司 一种铝电解槽盖板的新型保温涂层及其涂料和制备方法
CN114989727A (zh) * 2022-04-28 2022-09-02 昆明理工大学 一种消防车及其相关设备用的耐明火涂层

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RU2690814C2 (ru) * 2017-05-03 2019-06-05 Акционерное общество "Государственный космический научно-производственный центр им. М.В. Хруничева" Состав для получения теплозащитного покрытия

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IT201700014108A1 (it) * 2017-02-09 2018-08-09 Ludovici Raffaele E Figli S R L Microsfere ceramiche cave di silicio con additivi fotocatalitici, antimuffa, antibatterici, attivi nello spettro UV, anti-inquinamento, assorbitori di odori per vernici ed idropitture
RU2641933C1 (ru) * 2017-06-27 2018-01-23 федеральное государственное бюджетное образовательное учреждение высшего образования "Национальный исследовательский университет "МЭИ" (ФГБОУ ВО "НИУ "МЭИ") Композиция для получения теплоизоляционных изделий
CN112159241A (zh) * 2020-10-09 2021-01-01 邢台德勤工矿工程有限公司 一种刚玉-铝硅酸盐复合耐火材料及其制备方法和应用
CN114163883A (zh) * 2021-12-09 2022-03-11 中国铝业股份有限公司 一种铝电解槽盖板的新型保温涂层及其涂料和制备方法
CN114989727A (zh) * 2022-04-28 2022-09-02 昆明理工大学 一种消防车及其相关设备用的耐明火涂层

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