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    Hydrophobic coating compositions for drag reduction
    3.
    发明授权
    Hydrophobic coating compositions for drag reduction 有权
    用于减阻的疏水涂料组合物

    公开(公告)号：US08258206B2

    公开(公告)日：2012-09-04

    申请号：US11787214

    申请日：2007-04-13

    申请人： Subbareddy Kanagasabapathy ,  Richard J. Baumgart ,  Wen-Chen Su ,  Frances E. Lockwood

    发明人： Subbareddy Kanagasabapathy ,  Richard J. Baumgart ,  Wen-Chen Su ,  Frances E. Lockwood

    IPC分类号： C09K3/00

    CPC分类号： C08K3/36 ,  C08G77/26 ,  C08K2003/0881 ,  C08K2003/2296 ,  C08K2201/011

    摘要： A hydrophobic coating has been made for use on interior pipe surfaces, exterior boat surfaces, and in many other applications, to reduce drag in fluid flow, thus providing an energy savings. The coating utilizes a blend of organic and/or inorganic polymers with hydrophobic nanoparticles of fumed silica and/or titania in a solvent. The coating solves the problem of poor resistance to UV light and/or abrasion found in previous coatings of similar nature. The coating of the present invention can be made to be translucent and nearly transparent whereas previous coatings of comparable hydrophobicity have all been white or opaque. The coating can be applied in a single application by an easy spraying method and the super hydrophobic property can be achieved by drying the film at room temperature for 5 to 10 minutes. A preferred coating has good resistance to UV light and some resistance to abrasion. The hydrophobic drag reduction coating composition forms an almost clear, translucent film or coating on painted material, plastic, metal, glass, ceramic, fiberglass or polymer substrate. A preferred coating composition comprising an effective amount of a treated fumed silica in a solvent resulting in a coated surface providing a contact angle of at least 165 degrees as compared to water having a contact angle of from 10 to 15 degrees on a noncoated surface. The composition imparts a degree of hydrophobicity to a surface so that the surface will have a tilt angle of sliding of less than 2 degrees as compared to water on a noncoated surface having a tilt angle of sliding of 90 degrees or higher.

    摘要翻译： 已经制造了用于内部管表面，外部船表面以及许多其它应用中的疏水性涂层，以减少流体流动中的阻力，从而提供节能。 该涂层利用有机和/或无机聚合物与溶剂中的热解二氧化硅和/或二氧化钛的疏水性纳米颗粒的混合物。 该涂层解决了在类似性质的以前涂层中发现的耐UV光和/或耐磨性差的问题。 本发明的涂层可以是半透明的并且几乎是透明的，而具有相当的疏水性的以前的涂层全部是白色或不透明的。 该涂层可以通过简单的喷涂方法在单一应用中施加，并且可以通过在室温下将膜干燥5至10分钟来实现超疏水性。 优选的涂层具有良好的耐紫外线性和耐磨性。 疏水性减阻涂料组合物在涂料，塑料，金属，玻璃，陶瓷，玻璃纤维或聚合物基材上形成几乎透明的半透明薄膜或涂层。 一种优选的涂料组合物，其在溶剂中包含有效量的经处理的热解法二氧化硅，其导致涂覆表面与非涂覆表面上的接触角为10至15度的水相比，提供至少165度的接触角。 组合物赋予表面一定程度的疏水性，使得与具有90度或更高的滑动倾斜角的非涂覆表面上的水相比，该表面将具有小于2度的倾斜倾斜角。

    Hydrophobic self-cleaning coating compositions
    4.
    发明申请
    Hydrophobic self-cleaning coating compositions 审中-公开
    疏水性自洁涂料组合物

    公开(公告)号：US20090018249A1

    公开(公告)日：2009-01-15

    申请号：US11699883

    申请日：2007-01-30

    申请人： Subbareddy Kanagasabapathy ,  Richard J. Baumgart ,  Michael Dituro ,  Wen-Chen Su ,  Frances E. Lockwood

    发明人： Subbareddy Kanagasabapathy ,  Richard J. Baumgart ,  Michael Dituro ,  Wen-Chen Su ,  Frances E. Lockwood

    IPC分类号： C08K3/22 ,  C08K3/36

    CPC分类号： C09D1/00 ,  C08K3/36 ,  C09D5/008 ,  C09D5/021 ,  C09D5/1618 ,  C09D7/61 ,  C09D7/67 ,  C09K3/30

    摘要： A hydrophobic self cleaning coating composition that can be applied by conventional methods such as by spraying the composition onto a surface forming creating a wet and dry dirt repellent coating on the surface. The coating utilizes hydrophobic nanoparticles of fumed silica and/or titania in a solvent which evaporates at ambient temperature. The coating solves the problem of poor resistance to UV light, opaque appearance, and/or abrasion found in previous coatings of similar nature. Virtually transparent coating are produced as compared to conventional coatings of comparable hydrophobicity which are typically white or opaque. The coating can be applied by a single and easy spraying method and the super hydrophobic property can be achieved by drying the film by evaporation of the solvent at ambient temperature for 5 to 10 minutes. Embodiments of the hydrophobic self-cleaning coating composition can be produced resulting in a clear coating or in some cases a translucent dirt repellant film or coating on painted material, plastic, metal, glass, ceramic, fiberglass or a polymer substrate. One preferred coating composition utilizing an effective amount of a treated fumed silica in a solvent forms a coated surface providing a contact angle of at least 165 degrees as compared to water having a contact angle of from 10 to 15 degrees on a noncoated surface. The self-cleaning coating composition imparts a degree of hydrophobicity to a surface so that the treated surface will have a tilt angle of sliding of less than 2 degrees as compared to water on a noncoated surface having a tilt angle of sliding of 90 degrees or higher.

    摘要翻译： 疏水性自清洁涂料组合物，其可以通过常规方法施用，例如通过将组合物喷雾到表面上形成湿表面和干污垢涂层的表面上。 该涂层使用在环境温度下蒸发的溶剂中的热解法二氧化硅和/或二氧化钛的疏水性纳米颗粒。 该涂层解决了在类似性质的先前涂层中发现的耐紫外线性差，不透明外观和/或耐磨性差的问题。 与通常为白色或不透明的相当的疏水性的常规涂层相比，产生几乎透明的涂层。 可以通过单一且容易的喷涂方法施加涂层，并且可以通过在环境温度下蒸发溶剂5至10分钟来干燥膜来实现超疏水性。 可以制造疏水性自清洁涂料组合物的实施方案，从而形成透明涂层，或在某些情况下产生在涂漆材料，塑料，金属，玻璃，陶瓷，玻璃纤维或聚合物基材上的半透明防污膜或涂层。 使用有效量的经处理的热解法二氧化硅在溶剂中的一种优选的涂料组合物与在非涂层表面上的接触角为10至15度的水相比形成了涂覆表面，其提供至少165度的接触角。 自清洁涂料组合物赋予表面一定程度的疏水性，使得与具有90度或更高的滑动倾斜角的未涂覆表面上的水相比，经处理的表面将具有小于2度的倾斜倾斜角度 。

    Hydrophobic self-cleaning coating compositions
    5.
    发明申请
    Hydrophobic self-cleaning coating compositions 审中-公开

    公开(公告)号：US20080221009A1

    公开(公告)日：2008-09-11

    申请号：US12011566

    申请日：2008-01-28

    申请人： Subbareddy Kanagasabapathy ,  Richard J. Baumgart ,  Michael A. Dituro ,  Wen-Chen Su ,  Frances E. Lockwood

    发明人： Subbareddy Kanagasabapathy ,  Richard J. Baumgart ,  Michael A. Dituro ,  Wen-Chen Su ,  Frances E. Lockwood

    IPC分类号： C11D1/82

    CPC分类号： C11D3/124 ,  C11D7/5004 ,  C11D11/0023

    摘要： A super hydrophobic self cleaning coating composition that can be applied by conventional methods such as by spraying the composition onto a surface creating a wet and dry dirt repellent coating on the surface. The super hydrophobic self cleaning coatings are used on exterior automotive and boat surfaces, and in many other applications, to produce a self cleaning surface, reduce adherence of dirt and contaminants to a treated surface, and reduce drag in some applications providing an energy savings. The coating utilizes a blend of organic and/or inorganic polymers with hydrophobic nanoparticles of fumed silica and/or titania in a volatile solvent which evaporates at ambient temperature. The coating solves the problem of poor resistance to UV light, opaque appearance, and/or some abrasion resistance not found in previous coatings of similar nature. A preferred coating has good resistance to UV light and some resistance to abrasion. Clear, nearly transparent and translucent coatings are produced as compared to conventional coatings of comparable hydrophobicity which are typically white or opaque. The coating can be applied by a single and easy spraying method and the super hydrophobic property can be achieved by drying the film by evaporation of the solvent at ambient temperature for 5 to 10 minutes. Embodiments of the super hydrophobic self-cleaning coating composition result in a clear coating or in some cases a translucent dirt repellant film for coating on painted material, plastic, metal, glass, ceramic, fiberglass or a polymer substrate. The coating utilizes a blend of organic and/or inorganic polymers with hydrophobic nanoparticles of fumed silica and/or titania in a volatile solvent. At least one preferred coating composition comprising an effective amount of a treated fumed silica in a solvent resulting in a coated surface providing a contact angle of at least 165 degrees as compared to water having a contact angle of from 10 to 15 degrees on a noncoated surface. The composition imparts a degree of hydrophobicity to a surface so that the surface will have a tilt angle of sliding of less than 2 degrees as compared to water on a noncoated surface having a tilt angle of sliding of 90 degrees or higher. The coating composition is removed by washing with a detergent or applying pressure to the coating wiping same from the treated surface. Exposure to water in the form of rain or snow does not remove the coating composition.