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    • 4. 发明授权
    • Process for applying a topcoat to a porous basecoat
    • 将面漆涂布于多孔底漆的方法
    • US06475612B1
    • 2002-11-05
    • US09491642
    • 2000-01-27
    • Douglas E. KnightYi-Hua TsaoEric L. BurchYubai BiBor-Jiunn NiuPeter C. ZahrobskyBarbara A. Kumpf
    • Douglas E. KnightYi-Hua TsaoEric L. BurchYubai BiBor-Jiunn NiuPeter C. ZahrobskyBarbara A. Kumpf
    • B05D136
    • B41M5/52B41M5/506B41M5/5218B41M5/5227B41M5/5236B41M5/5254B41M5/5281Y10T428/249953
    • A process is provided that allows the production of multi-layer coatings in which one or more topcoats can be applied to a porous basecoat to produce a uniform and defect-free coating layer. Specifically, a process is provided in which a liquid is applied to the basecoat prior to topcoating such that the air in the basecoat is removed prior to topcoating. This process can occur in-line with a simple apparatus described herein. An added benefit of this method is that it also allows the possibility of adding functionality or performing chemistry to a basecoat after the basecoat is dried and before the topcoat is applied in a single process. For example, the wetting fluid may contain, but is not limited to, surfactants, pH modifiers, polymers, crosslinkers, pigments, and/or dye stabilizers. Advantages over what has been done before include the use of re-wetting process that allows a topcoat to be applied to a porous basecoat that is coated on a non-porous substrate such that bubbles are not formed in the topcoat. In addition, there is added flexibility of incorporating functionality or chemistry in the re-wetting process. Finally, the process is simple to implement and is compatible with many general coating methods, such as slot-die coating, rod coating, blade coating, gravure coating, knife-over-roll coating, or the like.
    • 提供了一种方法,其允许生产多层涂层,其中一个或多个面漆可以施加到多孔底涂层以产生均匀且无缺陷的涂层。 具体地,提供了一种方法,其中在顶涂之前将液体施加到底涂层,使得在底涂层之前的空气在顶涂之前被去除。 该过程可以与本文所述的简单装置在一起发生。 该方法的另外一个好处是它还允许在底涂层干燥之后以及在单一工艺中使用顶涂层之前,向底漆添加官能或进行化学反应的可能性。 例如,润湿流体可以包含但不限于表面活性剂,pH调节剂,聚合物,交联剂,颜料和/或染料稳定剂。 与之前所做的相比,优点包括使用再润湿方法,其允许将外涂层施用于涂覆在无孔基材上的多孔底漆,使得顶涂层中不形成气泡。 此外,在再润湿过程中增加了将功能或化学结合的灵活性。 最后,该方法易于实施,并且与诸如槽模涂布,棒涂,刮刀涂布,凹版涂布,刮刀涂布等的许多常规涂布方法兼容。