• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for coating a base element (1) for a household appliance component. The method comprises at least the steps of depositing at least one layer (2) containing silicon dioxide on at least one surface of the base element (1) by chemical deposition in the gas phase by combustion, and coating at least a part of the layer (2) of silicon dioxide using at least one fluorosilane. Also, the invention refers to a component of domestic appliance comprising a base element (1) coated and a household appliance comprising at least one component of household appliance. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2673370A1
    申请号:ES201631638
    申请日:2016-12-21
    公开日:2018-06-21
    发明作者:Jorge ALAMAN AGUILAR；Raquel ALICANTE SANTIAGO；Maria Carmen Artal Lahoz；Carlos Gimeno Asin；Carlos Sanchez Somolinos
    申请人:BSH Hausgeraete GmbH；BSH Electrodomesticos Espana SA；
    IPC主号:
    专利说明:

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    METHOD FOR COVERING A BASE ELEMENT FOR A DOMESTIC APPLIANCE COMPONENT, AND COMPONENT OF
    DOMESTIC APPLIANCE
    The invention refers to a method for coating a base element for a household appliance component. Likewise, the invention refers to a household appliance component comprising a coated base element and a household appliance comprising said household appliance component.
    Hydrophobic surfaces are an issue that is becoming increasingly important in household appliances and are necessary in many applications. The properties of a hydrophobic surface are particularly useful if water or other hydrophilic substances are to be kept away from certain surface areas. Examples include surfaces that repel water from cooking countertops, easy-to-clean surfaces, anti-fingerprint properties, and avoidance of the presence of water in conductive or capacitive areas.
    However, currently known coatings show quite low degrees of hydrophobicity or require complex and expensive coating materials and methods to achieve sufficiently large contact angles.
    The present invention solves the technical problem of providing a method for coating a base element for a household appliance component with an economical hydrophobic coating. Another technical problem that the invention solves is to provide a household appliance component comprising a base element with an economical hydrophobic coating. Likewise, the present invention also solves the technical problem of providing a household appliance comprising at least one household appliance component with an economical hydrophobic coating.
    These problems are solved by a method for coating a base element for a household appliance component, a household appliance component, and a household appliance according to the independent claims. Advantageous developments of the invention are specified in the respective dependent claims, wherein the advantageous developments of the first aspect of the invention are to be considered advantageous developments of all other aspects of the invention, and vice versa.
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    The first aspect of the invention refers to a method for coating a base element for a household appliance component, which comprises at least the steps of depositing at least one layer containing silicon dioxide on at least one surface of the base element by chemical deposition in the gas phase by combustion, and coating at least a part of the silicon dioxide layer using at least one fluorosilane. The method according to the invention makes it possible to produce hydrophobic or even superhydrophobic surfaces through the combination of one or more layers containing silicon dioxide, which are deposited on at least one surface of the base element by chemical deposition in the gas phase by combustion, and the subsequent coating of the layer (s) containing silicon dioxide using at least one fluorosilane as the coating agent. The deposition by chemical deposition in the gas phase by combustion comprises the pyrolytic deposition by means of a flame of silicon dioxide (usually amorphous) on the base material to create a type of silicate coating. A gas flame is supplied to the surface to be treated, which is doped with a material containing silicon, the so-called pyrosyl. The pyrosyl burns in the flame and is deposited as silica nanoparticles on the surface in a tightly adherent coating. Thanks to the brief flame-substrate interaction, the surface temperature of the material remains low. Thus, the first step of the deposition is appropriate not only for base materials made of glass, ceramics, or metal, but also for base materials made of plastic, wood, or other materials, so that any type of household appliance component can be provided with a hydrophobic coating. The newly deposited silica layers are highly reactive and therefore serve as layers that promote adhesion for the next fluorosilane coating. Adhesion can be further enhanced by the application of additional adhesion promoters based on silane. Alternatively, it can be provided that the layer is composed of silicon oxide. Likewise, the present invention is based on the idea that the deposition of said silicon dioxide layer (s) significantly increases the hydrophobicity, effectiveness, and controllability of the next coating step with one or more fluorosilanes It may be provided that the resulting layer is composed of said one or more fluorosilanes. Alternatively, the resulting layer may comprise or be composed of reaction products of the fluorosilane (s) and / or contain one or more other components. This makes possible the rapid and simple manufacture of coatings with a higher degree of hydrophobicity than conventional coatings. Likewise, the necessary base materials, that is, the precursor material with silicon content and fluorosilane, are commercially available, so that high performance expensive materials are not required for
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    achieve the properties of a hydrophobic or even superhydrophobic surface with water contact angles of at least 150 ° or more. Both steps, that is, the deposition step and the coating step, can generally be carried out independently of each other once or multiple times to adjust the respective properties of the layer.
    In an advantageous development of the invention, it is envisioned that the base element be cleaned and / or pretreated at least in parts before the layer containing silicon dioxide content is deposited. This improves the adhesion of the deposited silicon oxide layer (s).
    In another advantageous development of the invention, it is envisioned that the base element be cleaned by the application of a cleaning agent and / or by ultrasonic cleaning and / or that the base element be pretreated by drying and / or ozone treatment. By way of example, the base material can be cleaned with water and a detergent or with an alcohol such as ethanol or isopropanol. Alternatively or additionally, the base material can be submerged in water and treated with ultrasound for up to several minutes, for example, 10 minutes. This can be repeated several times with intermediate rinse steps
    optional Alternatively or additionally, the base material can be dried by heating and / or by the application of compressed air. Also alternatively or additionally, an ozone treatment removes surface debris and improves the adhesion of the silicon dioxide layer (s), particularly in the case of glass surfaces and other surfaces with free OH groups.
    In another advantageous development of the invention, it is envisioned that an organosilane precursor, in particular, tetraethoxysilane and / or tetramethylsilane, is used to deposit the silicon dioxide-containing layer. Tetraethoxysilane has the chemical formula (I)
    image 1
    OR
    image2
    O ----- Yes ----- O
    image3
    OR
    image4
    (I),
    25 while tetramethylsilane has the chemical formula (II)
    During the passage of the chemical deposition in the gas phase by combustion, the organic groups of the organosilane precursor decompose in the flame, which leads to the formation of silanol R-Si (OH) 3. Then, as a consequence of the condensation reactions, the siloxane layer (SiO2) is created and it adheres to the surface of the base material. This layer is highly hydrophilic and has a nanoporous structure.
    In another advantageous development of the invention, it is provided that at least two layers of silicon dioxide are deposited on the base element. This means that 2, 3, 4, 5, 6, 7, 8, 9, 10 or more layers can be deposited on the base material to achieve desired surface properties. Alternatively or additionally, the deposited silicon dioxide is expected to have a grouped particle size between 25 nm and 300 nm, for example, 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, 95 nm, 100 nm,
    105 nm, 110 nm, 115 nm, 120 nm, 125 nm, 130 nm, 135 nm, 140 nm, 145 nm, 150 nm, 155
    nm, 160 nm, 165 nm, 170 nm, 175 nm, 180 nm, 185 nm, 190 nm, 195 nm, 200 nm, 205 nm,
    15 210 nm, 215 nm, 220 nm, 225 nm, 230 nm, 235 nm, 240 nm, 245 nm, 250 nm, 255 nm, 260
    nm, 265 nm, 270 nm, 275 nm, 280 nm, 285 nm, 290 nm, 295 nm or 300 nm, and / or an average quadratic roughness value between 40 nm and 100 nm, for example, 40 nm, 45 nm, 50 nm, 55 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 90 nm, 95 nm, 100 nm, as well as the respective intermediate values. This makes it possible to precisely adjust the hydrophobic properties 20 and the resulting water contact angle and water slide angle (angle of inclination) of the coated base material. For most applications, the grouped particle sizes between 100 nm and 200 nm and a mean square roughness value (Rq, Rrms) between approximately 50 nm and 80 nm ensure a superhydrophobic effect with contact angles with water up to 160 ° and 25 more and sliding angles of 5 ° or less.
    In another advantageous development of the invention, it is envisioned that 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane and / or trichloro (1H, 1H, 2H, 2H-perfluorooctyl) silane is used as the mentioned fluorosilane. 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFOTESi) has the chemical formula (III)
    image5
    while trichloro (1H, 1H, 2H, 2H-perfluorooctyl) silane (PFOTCSi) has the chemical formula (IV)
    image6
    F
    (IV).
    Both substances show excellent hydrophobic properties in combination with the silicon dioxide-containing layer (s) thanks to its extremely low surface energy and the quick and simple reaction of its silane groups with hydroxyl groups of the layer (s) they contain. silicon dioxide
    In another advantageous development of the invention, it is envisioned that the base element is coated with at least one fluorosilane layer by immersing at least a part of the base element once or multiple times for a predetermined time in a coating agent comprising said fluorosilane. The passage of the so-called immersion coating makes possible a quick and simple coating of large base materials and base materials with complex geometries. Naturally, this step can be repeated once or multiple times with the same or different coating agents, allowing a series of thin layers to accumulate to form a relatively thick final layer system.
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    In another advantageous development of the invention, the concentration of fluorosilane in the coating agent is expected to be between 0.5% by volume and 50% by volume, for example, 0.5% by volume, 0 , 6% by volume, 0.7% by volume, 0.8% by volume, 0.9% by volume, 1.0% by volume, 2% by volume, 3% by volume, 4% by volume, 5% by volume, 6% by volume, 7% by volume, 8% by volume, 9% by volume, 10% by volume, 11% by volume, 12 % by volume, 13% by volume, 14% by volume, 15% by volume, 16% by volume, 17% by volume, 18% by volume, 19% by volume, 20% by volume volume, 21% by volume, 22% by volume, 23% by volume, 24% by volume, 25% by volume, 26% by volume, 27% by volume, 28% by volume, 29% by volume, 30% by volume, 31% by volume, 32% by volume, 33% by volume, 34% by volume, 35% by volume, 36% by volume, 37 % by volume, 38% by vo lumen, 39% by volume, 40% by volume, 41% by volume, 42% by volume, 43% by volume, 44% by volume, 45% by volume, 46% by volume, 47% by volume, 48% by volume, 49% by volume, or 50% by volume. This makes it possible to precisely adjust the coating step and the resulting layer properties. Additionally or alternatively, it is envisioned that the coating agent contains a solvent, in particular a fluorinated solvent, to dilute the fluorosilane as necessary. The solvent may be or comprise, for example, methoxyperfluorobutane (HFE-7100). Additionally or alternatively, the predetermined time is expected to be between 10 seconds and 120 minutes, for example, 10 s, 15 s, 20 s, 25 s, 30 s, 35 s, 40 s, 45 s, 50 s , 55 s, 60 s, 2 min, 4 min, 6 min, 8 min, 10 min, 12 min, 14 min, 16 min, 18 min, 20 min, 22 min, 24 min, 26 min, 28 min, 30 min, 32 min, 34 min, 36 min, 38 min, 40 min, 42 min, 44 min, 46 min, 48 min, 50 min, 52 min, 54 min, 56 min, 58 min, 60 min, 62 min, 64 min, 66 min, 68 min, 70 min, 72 min, 74 min, 76 min, 78 min, 80 min, 82 min, 84 min, 86 min, 88 min, 90 min, 92 min, 94 min, 96 min , 98 min, 100 min, 102 min, 104 min, 106 min, 108 min, 110 min, 112 min, 114 min, 116 min, 118 min or 120 min. This also makes possible the precise adjustment of the coating step and the resulting coating properties.
    In another advantageous development of the invention, it is envisioned that the base element is coated by chemical deposition in the gas phase using said fluorosilane. Thus, the base element, which has already been provided with the layer (s) containing deposited silicon dioxide (s), is exposed to one or more volatile fluorosilanes, which react and / or decompose on the substrate surface to produce the hydrophobic top layer. The fluorosilane can be, for example, hydrolyzed, which causes the formation of silanoles that are also condensed, thus creating hydrogen bonds with their molecules
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    species and / or with OH groups of the layer containing silicon dioxide. In this way, the fluorosilane (s) decomposes and binds covalently to the base layer containing silicon dioxide, thus providing the base material with durable hydrophobic surface characteristics.
    In another advantageous development of the invention, fluorosilane is expected to be exposed to water, in particular, to moist air. This promotes the hydrolyzing of fluorosilane and, therefore, the condensation reactions with the layer containing silicon dioxide.
    In another advantageous development of the invention, it is envisioned that the base element will be further treated after the coating step. This makes it possible to remove water, solvents, or unreacted compounds and / or cure unreacted compounds in the layers.
    In another advantageous development of the invention, it is envisioned that the subsequent treatment comprises the heat treatment of the coated base element at a predetermined temperature for a predetermined time and / or the cleaning of the coated base element. The base material can be heated, for example, for up to 10 minutes at temperatures between 100 ° C and 120 ° C (110 ° C) in order to evaporate the water and to promote the condensation of the unreacted silanol groups. Further treatment may also include cleaning the base element coated, for example, with acetone, to remove silanes or other impurities.
    The second aspect of the invention refers to a household appliance component
    comprising a base element, where at least one surface of the base element is
    at least partially coated with at least one layer containing silicon dioxide
    deposited by chemical deposition in gaseous phase by combustion and at least one
    layer that is produced by coating at least a part of the layer of
    silicon dioxide using at least one fluorosilane. Therefore, the device component
    domestic according to the invention comprises one or more hydrophobic surfaces or even
    superhydrophobic through the combination of one or more layers containing dioxide
    of silicon, which are deposited on at least one surface of the base element by
    chemical deposition in the gas phase by combustion, and the subsequent coating of the (s)
    layer (s) containing silicon dioxide using at least one fluorosilane as agent
    of coating. Deposition by chemical deposition in gas phase by combustion
    comprises pyrolytic deposition by means of silicon dioxide flame (normally
    amorphous) on the base material to create a type of silicate coating. To the surface
    to be treated a gas flame is supplied that is doped with a material
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    With silicon content, the so-called pyrosyl. The pyrosyl burns in the flame and is deposited as silica nanoparticles on the surface in a tightly adherent coating. Thanks to the brief flame-substrate interaction, the surface temperature of the material remains low. Thus, any type of base material, for example, base materials made of glass, ceramics, or metal, but also base materials made of plastic, wood, or other materials, can be provided with a hydrophobic coating. The newly deposited silica layers are highly reactive and therefore serve as layers that promote adhesion for the next fluorosilane coating. Adhesion can be further enhanced by the application of additional adhesion promoters based on silane. Alternatively, it can be provided that the layer is composed of silicon oxide. Likewise, the present invention is based on the idea that the deposition of said silicon dioxide layer (s) significantly increases the hydrophobicity, effectiveness, and controllability of the next coating step with one or more fluorosilanes It can be envisaged that the resulting layer (s) will be composed of said one or more fluorosilanes. Alternatively, the resulting layer (s) may comprise or be composed of reaction products of the fluorosilane (s) and / or contain one or more other components. This makes possible the rapid and simple manufacture of coatings with a higher degree of hydrophobicity than conventional coatings. Likewise, the necessary base materials, that is, the precursor material with silicon content and fluorosilane, are commercially available, so that high performance expensive materials are not required to achieve the properties of a hydrophobic or even superhydrophobic surface with angles of contact with water of at least 150 ° or more. The base material may generally comprise one or more layers containing silicon dioxide and one or more layers made of fluorosilane (s) to adjust the respective properties of the layer.
    In another advantageous embodiment of the invention, it is envisioned that the coated surface of the base element is superhydrophobic. According to the present invention, the term "hydrophobic" refers to coatings with water contact angles between 90 ° and 149 °, while the term "superhydrophobic" refers to coatings with water contact angles of more than 149 ° and preferably 160 ° or more, for example, 150 °, 151 °, 152 °, 153 °, 154 °, 155 °, 156 °, 157 °, 158 °, 159 °, 160 °, 161 ° , 162 °, 163 °, 164 °, 165 °, 166 °, 167 °, 168 °, 169 °, 170 ° or more. This ensures that it is extremely difficult to wet the surfaces.
    The third aspect of the invention refers to a household appliance comprising the
    at least one component of household appliance with at least one base element, which is
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    produced by a method in accordance with the first aspect of the invention and / or at least one household appliance component in accordance with the second aspect of the invention. The resulting features and their advantages can be drawn from the description of the first and second aspects of the invention. It is envisioned that the domestic appliance may be configured as a dishwasher, as a dryer, as a washing machine, as a microwave oven, and / or as a steam oven.
    Other features of the invention are drawn from the claims, the figures and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures are usable not only in the combination indicated in each case, but also in other combinations, without abandoning the scope of the invention. Therefore, it should be understood that those embodiments of the invention that are not explicitly shown in the figures or explained, but which can be extracted through combinations of features separate from the shapes are also understood and disclosed by the invention. of realization exposed, and that can be generated from these. Therefore, those embodiments and combinations of features that do not have all the features of an independent claim originally formulated will also be considered disclosed. Likewise, those embodiments and combinations of features that transcend or differ from the combinations of features set forth in references to the claims shall be deemed disclosed by means of the embodiments set forth above. The figures show in:
    Fig. 1 a schematic section view of a base element for a component
    of domestic appliance on which a layer of silicon dioxide is deposited by chemical deposition in the gas phase by combustion; Y
    Fig. 2 a schematic sectional view of the base element, which is coated
    also using a fluorosilane.
    Figure 1 shows a schematic sectional view of a base element 1 made of
    glass for a household appliance component. For the preparation of a surface
    superhydrophobic, the following steps are carried out. First, the base element 1 is cleaned
    with soap and water, it is immersed in a water bath, and ultrasound is applied during
    approximately 10 minutes After rinsing the base material 1, it is submerged a
    again in clean water and ultrasound is applied for another 10 minutes. The next
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    Cleaning step comprises immersion of base material 1 in ethanol and the application of ultrasound for another 10 minutes. Finally, the base material 1 is dried with compressed air. Next, the base material 1 is treated with ozone to remove any organic waste and to expose the OH groups of the glass material.
    Next, one or more layers containing silicon dioxide are deposited on the base element 1 by chemical deposition in the gas phase by combustion. This step creates an amorphous layer 2 of SiO2 through a process called pyrosyl. Pyrosyl is an organosilane precursor, which is injected into a flame (air + propane) in an amount sufficient to saturate the flame with the organosilane vapor. The pyrosyl can be, for example, tetraethoxysilane (Si (OC2H5) 4) or tetramethylsilane (Si (CH3) 4). Other organosilanes can also be used as a pyrosyl / precursor.
    The system used here to deposit the pyrosyl comprises an evaporator to create the organosilane vapor. For this purpose, the air passes through the evaporator and is saturated by the organosilane vapor and mixed with propane for combustion. The system parameters are:
    - The temperature of the organosilane in the chamber is approximately 26 ° C
    - The flow of pyrosyl is 839 ml / min
    - The concentration of pyrosyl is 99% by volume
    - The air flow is 100 l / min, and
    - The propane flow is 5.5 l / min.
    Good results are obtained if the surface of the base element 1 is placed between the inner and outer part of the flame, that is, on the oxidizing part (non-luminescent part) of the flame. The distance between the burner and the base element 1 is approximately 64 mm. The speed at which the base element 1 is moved along the flame is 100 mm / s. In order to increase the deposition of pyrosyl on the surface, multiple passes are made using the same conditions, with pauses of approximately 15 seconds between different passes.
    During combustion, the organosilane organic groups decompose within the flame, thus forming silanol (R-Si (OH) 3) molecules.
    The new silanol molecules formed undergo condensation reactions with
    other silanol molecules and the OH groups of the glass surface of the base element 1,
    whereby the silanol molecules covalently bind to the surface of the
    base element 1. Therefore, a highly hydrophilic siloxane base layer 2 is formed
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    (SiO2) with a nanoporous structure, which is firmly adherent to the base element 1. This step consisting of depositing a layer 2 with silicon dioxide content can be repeated once or several times.
    Thanks to the system used, the amount of SiO2 deposited is directly related to the number of passes or repetitions. However, it should be emphasized that the key factor is not necessarily the number of passes, but the amount of pyrocyl / SiO2 deposited. In other words, the number of passes and, therefore, the number of layers 2, depends on the subsequent purpose of the base element 1, the desired properties of the layer (s) 2, and the system and parameters used to create layer (s) 2. With the help of, for example, a field emission scanning electron microscope (FESEM), it is possible to measure the surface roughness of layer 2 and analyze the amount of SiO2 deposited by evaluating the quantity and size of SiO2 grains.
    For 1 pass, SiO2 particles of approximately 20 nm in diameter and clusters of 5 to 10 particles are formed. The more pyrosyl is added in successive passes, the thicker the deposited layer 2 will be, so that the particles are grouped into larger particles. For 2 passes, the average size of these grouped particles is approximately 100 nm, and for 4 passes, approximately 200 nm. If different pyrosiles are used for different passes, different layers 2 can be deposited.
    Figure 2 shows a schematic sectional view of the base element 1, which is further coated using a fluorosilane. Fluorosilane (or fluorinated silane) is applied to reduce the surface tension of the surface. Two different fluorosilanes have been deposited using two different methods. In general, both methods can be used alternatively or additionally, although the use of chemical gas deposition (CVD) is usually preferred.
    1) PFOTES immersion coating
    The base material 1 has been immersed in 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane (PFOTESi) containing solutions with different concentrations [1% by volume, 5% by volume, and 10% by volume in a fluorinated solvent (HFE-7100 ) during different times (10 or 60 minutes)]. Thus, one or more superhydrophobic upper layers (3) with different thicknesses are formed.
    2) CVD Coating with PFOTCSi
    The base material 1 is placed in a desiccator with 10 drops of trichloro (1H, 1H, 2H, 2H-perfluorooctyl) silane (PFOTCSi) for 1 hour under a vacuum of approximately 100 mbar. Due to the reaction of PFOTCSi with the humidity of the remaining atmosphere, the fluorosilane is hydrolyzed, thus forming silanoles that undergo subsequent condensation reactions with other silanol molecules and free OH groups of the SiO2 layer 2. Thus, the fluorosilane is covalently linked to the amorphous SiO2 layer 2 previously produced by the reaction of the pyrosyl and forms a superhydrophobic top layer 3. The fluorosilane layer 3 is a thin layer that follows the topography of the granulated layer 2 of pyrosyl.
    10 As a final post-treatment, the coated base material 1 is heated to approximately 110 ° C for approximately 10 minutes to promote evaporation of water and condensation of unreacted silane groups. Finally, the base material 1 is cleaned with acetone to remove any silane, silanol, or other components, without reacting.
    15 Apart from the FESEM, the topography of the resulting layers 2, 3 can be analyzed by scanning atomic force microscopy (AFM) to determine the size of the SiO2 particles and to determine the roughness of layer 2 or layer 3 In the following table 1, the average quadratic values of the roughness Rrms of the coated base material 1 are shown. It can be seen that the surface roughness increases with the number of
    20 passes of depositions of pirosil. For 4 passes of depositions of pirosil, the roughness is approximately 5 times greater than with 1 pass.
    Table 1: mean quadratic roughness as a function of the passages of depositions of pirosil
     1 Pirosil pass + PFOTCSi 2 Pirosil passes + PFOTCSi 3 Pirosil passes + PFOTCSi 4 Pirosil passes + PFOTCSi
     Rrms (nm)  16.8 49 58.9 80.7
    The surface roughness is related to the quantity and size of SiO2 particles and, therefore, to the angle of contact with water and the wettability of the surface. In summary, the use of the controlled deposition (s) of pyrosyl by varying the amount of passes and, therefore, the amount of pyrosyl / SiO2 and the size and surface concentration of the grains and the roughness not only improves the adhesion of the
    Next layer 3, but also produces very hydrophobic surface properties, even superhydrophobic. This effect is maximized if 3-4 passes of pyrosyl are deposited and / or if the size of the pooled particles of the deposited SiO2 is approximately between 100 nm and 200 nm and if the average quadratic value of the roughness Rrms is between 5 approximately 50 nm and 80 nm.
    With 1 pass of pirosil, the angle of contact with the water increases significantly although the surface is still "simply" hydrophobic. With 2 passes, there is a second increase that makes the surface superhydrophobic, and with 3 or 4 passes, the angle of contact with water stabilizes at approximately 167 °. Likewise, the superhydrophobic surfaces 10 made with between 3 and 4 passages of pirosil show an extremely low sliding angle. In the following table 2, the results of the contact angle with the water and the sliding angle are shown in comparison with the amount of passes of pyrosyl (directly related to the amount of pyrosyl).
    Table 2
     Ozone + PFOTCSi 1 Pirosil pass + PFOTCsi 2 Pirosil passes + PFOTCsi 3 Pirosil passes + PFOTCsi 4 Pirosil passes + PFOTCsi
     Water contact angle (°)  109.81 + 1.01 135.73 + 1.46 162.53 + 8.56 167.60 + 4.14 166.32 + 5.82
     Slip angle (°)  The water drop adheres to the surface The water drop adheres to the surface Non-homogeneous surface with changing angles 3.1 1.0
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    Those skilled in the art will understand that, while the present invention has been set forth with reference to the preferred embodiments, various modifications, changes and additions to the previous invention may be made without abandoning the spirit and scope thereof. The values of the parameters used in the 20 claims and in the description to define the process and measurement conditions to characterize the specific properties of the invention are also included.
    within the framework of deviations, for example, as a result of measurement errors, system errors, weight errors, DIN tolerances, and the like.
    1 Base element
    2 layer
    3 layer
    权利要求:
    Claims (15)
    [1]
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    1. Method for coating a base element (1) for a household appliance component, which comprises at least the steps of
    - depositing at least one layer (2) containing silicon dioxide on at least one surface of the base element (1) by chemical deposition in the gas phase by combustion; Y
    - coating at least part of the silicon dioxide layer (2) using at least one fluorosilane.
    [2]
    2. Method according to claim 1, wherein the base element (1) is cleaned and / or pretreated at least in parts before the layer (2) containing silicon dioxide content is deposited.
    [3]
    3. Method according to claim 2, wherein the base element (1) is cleaned by the application of a cleaning agent and / or by ultrasonic cleaning and / or where the base element (1) is pretreated by drying and / or treatment with ozone.
    [4]
    4. Method according to any one of claims 1 to 3, wherein an organosilane precursor, in particular tetraethoxysilane and / or tetramethylsilane, is used to deposit the layer (2) containing silicon dioxide.
    [5]
    5. Method according to any of claims 1 to 4, wherein at least two layers (2) of silicon dioxide are deposited on the base element (1) and / or where the deposited silicon dioxide has a size of the grouped particles of between 25 nm and 300 nm and / or an average quadratic roughness value between 40 nm and 100 nm.
    [6]
    Method according to any one of claims 1 to 5, wherein 1H, 1H, 2H, 2H-perfluorooctyltriethoxysilane and / or trichloro (1H, 1H, 2H, 2H-perfluorooctyl) silane is used as the mentioned fluorosilane.
    [7]
    7. Method according to any one of claims 1 to 6, wherein the base element (1) is coated with at least one layer (3) of fluorosilane by immersion of at least a part of the base element (1) once or multiple times during a predetermined time in a coating agent comprising said fluorosilane.
    [8]
    8. Method according to claim 7, wherein the concentration of fluorosilane in the
    Coating agent is between 0.5% by volume and 50% by volume and / or
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    where the coating agent contains a solvent, in particular, a fluorinated solvent, and / or where the predetermined time is between 10 seconds and 120 minutes.
    [9]
    9. Method according to any of claims 1 to 8, wherein the base element (1) is coated by chemical deposition in the gas phase using said fluorosilane.
    [10]
    10. A method according to any of claims 1 to 9, wherein said fluorosilane is exposed to water, in particular, to moist air.
    [11]
    11. Method according to any of claims 1 to 10, wherein the base element (1) is subsequently treated after the coating step.
    [12]
    12. Method according to claim 7, wherein the subsequent treatment comprises the heat treatment of the coated base element (1) at a predetermined temperature for a predetermined time and / or the cleaning of the coated base element (1).
    [13]
    13. Household appliance component comprising a base element (1), where at least one surface of the base element (1) is at least partially covered with at least one layer (2) containing silicon dioxide deposited by chemical deposition in combustion gas phase and at least one layer (3) that is produced by coating at least a part of the silicon dioxide layer (2) using at least one fluorosilane.
    [14]
    14. A household appliance component according to claim 13, wherein the coated surface of the base element (1) is superhydrophobic.
    [15]
    15. Home appliance comprising at least one household appliance component with at least one base element (1), which is produced by a method according to any one of claims 1 to 12 and / or at least one household appliance component according to claims 13 or 14.
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    同族专利:
    公开号 | 公开日
    ES2673370B1|2019-04-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20040033372A1|2002-05-25|2004-02-19|Lutz Mueller|Micromechanical component and method for producing an anti-adhesive layer on a micromechanical component|
    US20040209072A1|2002-08-09|2004-10-21|Inka Henze|Cleaning-friendly article with an easily cleanable, heat-resistant surface coating|
    ES2366371T3|2004-11-03|2011-10-19|Schott Ag|VITROCERAMIC ARTICLE WITH DIFFUSION BARRIER AND PROCEDURE FOR MANUFACTURING A VITROCERAMIC ARTICLE WITH DIFFUSION BARRIER.|
    MX2012003808A|2009-11-04|2012-07-20|Ssw Holding Co Inc|Cooking appliance surfaces having spill containment pattern and methods of making the same.|
    US20120107558A1|2010-11-01|2012-05-03|Shari Elizabeth Koval|Transparent substrate having durable hydrophobic/oleophobic surface|
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    法律状态:
    2018-06-21| BA2A| Patent application published|Ref document number: 2673370 Country of ref document: ES Kind code of ref document: A1 Effective date: 20180621 |
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201631638A|ES2673370B1|2016-12-21|2016-12-21|Method for coating a base element for a domestic appliance component, and domestic appliance component|ES201631638A| ES2673370B1|2016-12-21|2016-12-21|Method for coating a base element for a domestic appliance component, and domestic appliance component|
    PCT/IB2017/057684| WO2018109619A1|2016-12-12|2017-12-06|Method for coating a base element for a household appliance component and household appliance component|
    EP17821732.9A| EP3551779A1|2016-12-12|2017-12-06|Method for coating a base element for a household appliance component and household appliance component|
    CN201780076155.5A| CN110050087A|2016-12-12|2017-12-06|For coating the method and household appliance component that are used for the base component of household appliance component|
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