• 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 present invention relates to a wiper blade, a method for producing a wiper blade and the use of heavily pre-crosslinked natural and / or synthetic rubber powder for powder coating a natural and / or synthetic rubber element.
    公开号:BE1018597A5
    申请号:E2010/0004
    申请日:2010-01-07
    公开日:2011-04-05
    发明作者:Lay Reiner
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    description
    title
    Wiper blade prior art
    The present invention relates to a wiper blade, a process for producing a wiper blade and the use of highly precrosslinked natural and / or synthetic rubber powder for powder coating of a natural and / or synthetic rubber element.
    It is known to produce wiper blades, in particular for motor vehicles, from natural rubber (NR), the synthetic rubber polychloroprene (CR) or the synthetic rubber ethylene-propylene-diene rubber (EPDM).
    However, wiper blades without a special coefficient of friction-reducing coating have high friction, which can lead to noise and high abrasion in wiping operation.
    Disclosure of the invention
    The present invention is a wiper blade, in particular for motor vehicles, which has a wiper blade body, in particular a squeegee, and a powder coating, wherein the powder coating covers at least a portion of the wiper blade body, wherein the wiper blade body comprises natural and / or synthetic rubber, wherein the wiper blade, characterized in that the powder coating comprises a strongly precrosslinked natural and / or synthetic rubber powder.
    The powder coating advantageously reduces the friction of the wiper blade and thus noise and the wear of the surface of the wiper blade body.
    In this case, "strongly pre-crosslinked natural and / or synthetic rubber powder", in particular a natural and / or synthetic rubber powder, which has a net chain length of less than or equal to 10 in the finished product. Here, "a network chain length less than or equal to 10" means that there are only 10 or less monomer units between two network nodes.
    Strongly precrosslinked natural and / or synthetic rubber powders have the advantage that they are no longer tacky and thus fluidisable, whereby a powder coating by spraying the powder is made possible.
    In addition, a strongly precrosslinked natural and / or synthetic rubber powder can ensure good bonding to the surface of a wiper blade body comprising natural and / or synthetic rubber.
    In one embodiment of the present invention, the wiper blade body is formed of natural and / or synthetic rubber. The term "formed" here means that the wiper blade body has no other polymers than natural and / or synthetic rubber powder, in particular natural rubber. However, the term "formed" does not exclude that the wiper blade body may comprise other compounds, for example, additives such as fillers, lubricants, etc.
    In another embodiment of the present invention, the powder coating consists of a strongly precrosslinked natural and / or synthetic rubber powder. The term "pass" means that the powder coating has no other polymers than natural and / or synthetic rubber powder, in particular natural rubber. However, the term "formed" may include other compounds, for example, additives such as fillers, lubricants, etc.
    In a particularly preferred embodiment of the present invention, the natural and / or synthetic rubber powder comprises the same rubber or the same rubber mixture as the wiper blade body. In other words, the powder coating preferably comprises a strongly pre-crosslinked natural and / or synthetic rubber powder of the same type (polymer) as the natural and / or synthetic rubber of the wiper blade body. In particular, the powder coating and the wiper blade body may be formed of the same rubber, for example, precrosslinked NR on NR, or precrosslinked CR on CR, or pre-crosslinked EPDM on EPDM) or of the same rubber mixture. This has the advantage of a particularly good adhesion of the precrosslinked natural and / or synthetic rubber powder on the wiper blade body.
    The grain size can be determined by electron microscopy or (laser) light scattering. The degree of crosslinking can be determined by swelling in toluene in accordance with DIN 16892 or by NMR (nuclear magnetic resonance spectroscopy on the solid).
    Preferably, the wiper blade body has a wiper lip, wherein the powder coating covers at least a part of the wiper lip. In particular, the powder coating covers the part of the wiper lip which contacts a glass pane, in particular a windshield, in the mounted state of the wiper blade.
    With regard to further technical features of the wiper blade according to the invention, reference is hereby explicitly made to the disclosure in connection with the method according to the invention.
    S
    A further subject of the present invention is a process for producing a wiper blade according to the invention, in which a wiper blade body, in particular a squeegee, is provided, and at least a part of the wiper blade body with a strongly precrosslinked natural and / or synthetic rubber powder by spraying the natural rubber. and / or synthetic rubber powder is coated.
    Preferably, the wiper blade body has a wiper lip, wherein the wiper lip is coated by spraying the rubber powder.
    In the context of a particularly preferred embodiment of the method according to the invention, the wiper blade body is not yet vulcanized when the natural and / or synthetic rubber powder is sprayed on.
    In the context of a further, particularly preferred embodiment of the method according to the invention, the wiper blade body and the powder coating are subsequently co-vulcanized. In co-vulcanization, the natural and / or synthetic rubber powder is preferably postcrosslinked. On the one hand, this has the advantage that the adhesion of the powder coating to the surface of the wiper blade body can be improved. On the other hand, the crosslinking degree and the crosslinking density of the rubber powder are raised again by the co-vulcanization in the salt bath, whereby the friction and the wear of the surface of the wiper blade produced by the method can be further greatly reduced. The co-vulcanization can be carried out, for example, in a salt bath, hot air oven or microwave oven (UHF). The vulcanization of the wiper blade body or the co-vulcanization with the powder coating can be carried out in a continuous process.
    In a further, particularly preferred embodiment of the method according to the invention, the (co) -Vulkanissieren at temperatures of => 150 ° C to <= 260 ° C, in particular in the temperature range of> 170 ° C to <240 ° C instead.
    In a particularly preferred embodiment of the method according to the invention, the natural and / or synthetic rubber powder has a degree of crosslinking during spraying with a network chain length of 300 to 10 monomer units, in particular from 250 to 20 monomer units, preferably from 200 to 50 monomer units, and / or a powder grain size of> 1 μm to <100 μm, in particular of> = 3 μm to 30 μm, preferably of. > 5 / jm to <15 μιη, up. For example, the natural and / or synthetic rubber powder when sprayed on a degree of crosslinking with a network chain length of 300 to 10 monomer units and a powder grain size of> 1 μπ to <= 100 // m, in particular a degree of crosslinking with a network chain length of 250 to 20 Monomer units and a powder grain size of> = 3jvm to <= 30 μπ , preferably a degree of crosslinking with a network chain length of 200 to 50 monomer units and a powder grain size> = 5μιη to <= 15 ^ m, have. Such degrees of crosslinking and powder granulations have proved to be particularly advantageous for the powder coating process.
    With regard to further technical features of the method according to the invention, reference is hereby explicitly made to the disclosure in connection with the wiper blade according to the invention.
    Another object of the present invention is a wiper blade produced by the method according to the invention.
    Another object of the present invention is the use of strongly precrosslinked natural and / or synthetic rubber powder for powder coating a natural and / or synthetic rubber element, in particular profile, for example a wiper blade or a wiper blade body or a wiper blade rubber.
    With regard to further technical features of the use according to the invention, in particular with regard to the natural and / or synthetic rubber powder used and the natural and / or synthetic rubber element to be coated, reference is hereby explicitly made to the disclosure in connection with the wiper blade according to the invention and the method according to the invention. In this case, the disclosure in connection with the wiper blade body can be transferred to the natural and / or synthetic rubber element.
    权利要求:
    Claims (10)
    [1]
    A wiper blade, comprising a wiper blade body, and a powder coating, wherein the powder coating comprises a strongly precrosslinked natural and / or synthetic rubber powder and covers at least part of the wiper blade body, wherein the wiper blade body comprises natural rubber or synthetic rubber, characterized in that the wiper blade body has not yet been vulcanized during the coating with the natural and / or synthetic rubber powder.
    [2]
    2. Wiper blade according to claim 1, characterized in that the natural and / or synthetic rubber powder comprises the same rubber or the same rubber mixture as the wiper blade body.
    [3]
    3. A method for producing a wiper blade according to claim 1 or 2, in which - a wiper blade body is provided, and - at least a part of the wiper blade body with a strongly precrosslinked natural and / or synthetic rubber powder by spraying the natural and / or synthesis Rubber powder is coated 'wherein the wiper blade body is not yet vulcanized during spraying of the natural and / or synthetic rubber powder.
    [4]
    4. The method according to claim 3, characterized in that the natural and / or synthetic rubber powder comprises the same rubber or the same rubber mixture as the wiper blade body.
    [5]
    5. The method according to any one of claims 3 or 4, characterized in that the natural • and / or synthetic rubber powder during spraying has a degree of crosslinking with a Netzkettenlange of 300 to 10 monomer units and a powder grain size of ä 1 pm to <100pm.
    [6]
    6. The method according to any one of claims 3 to 5, characterized in that the wiper blade body and the powder coating are co-vulcanized.
    [7]
    7. The method according to any one of claims 3 to 6, characterized in that the co-vulcanizing the natural and / or synthetic rubber powder is postcrosslinked.
    [8]
    8. The method according to any one of claims 3 to 7, characterized in that co-vulcanization takes place in a salt bath, hot air oven or microwave oven.
    [9]
    9. The method according to any one of claims 3 to 8, characterized in that the co-vulcanization takes place at temperatures of> 150 ° C to <260 ° C.
    [10]
    10. Wiper blade, produced by the method according to one of claims 3 to 9.
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR2940778A1|2010-07-09|
    DE102009000072A1|2010-07-15|
    MX2010000208A|2010-07-15|
    FR2940778B1|2014-12-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3904152A1|1989-02-11|1990-08-16|Swf Auto Electric Gmbh|Rubber-elastic component and method for manufacturing it|
    WO2002094624A1|2001-05-23|2002-11-28|Robert Bosch Gmbh|Wiper blade|
    DE102005000851A1|2004-02-09|2005-08-25|Robert Bosch Gmbh|Window wiper blade for a vehicle has a rubber wiper lip onto which polymer film or granulate is applied|
    DE102007046914A1|2007-09-28|2009-04-09|Robert Bosch Gmbh|Coating varnish for coating wiper blades of a windshield wiper|
    DE102013203194A1|2013-02-27|2014-08-28|Robert Bosch Gmbh|Dispersion-coated squeegee|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102009000072|2009-01-08|
    DE200910000072|DE102009000072A1|2009-01-08|2009-01-08|wiper blade|
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