铝银浆的分类

2020-04-07492

  铝银浆的分类

  在生产过程的所有过程中都要添加润滑剂,以防止颜料团聚。这对金属颜料的润湿性能具有独特的影响,

  浮动和非浮动颜料之间的润湿特性存在明显差异。

  浮型颜料

  漂浮颜料具有高的表面张力并且不能被基础材料润湿,因此它们漂浮在油漆的湿膜的表面上。通过使用润滑剂,例如硬脂酸,可以达到这种效果。

  在包含强极性溶剂或粘合剂的涂料体系中,浮动颜料经常“下沉”并浸入非浮动颜料中。因此,在设计涂料配方时要考虑到这一点。如有必要,应使用经过特殊稳定处理的浮动颜料。

  非浮型颜料

  非浮型颜料可以通过在浮性颜料中添加强极性物质或润湿剂,或在研磨过程中直接添加特殊的润滑剂(例如油酸)来制备。

  非浮型颜料被完全润湿,因此它们可以均匀地分布在整个漆膜中。

  Classification of Aluminum paste

  A lubricant must be used in the various production processes to avoid coldwelding. This has a typical effect on the wetting behaviour of the metallic pigments,A distinction is drawn between leafing and non-leafing pigments.

  Leafing pigments

  Due to their high surface tension leafing pigments are not wetted by the binder and therefore float on the wet film. This effect is achieved by the use of e.g. stearic acid as lubricant.

  In paint systems with strongly polar solvents or binders there is always a danger that the leafing pigments will "drown" through wetting and turn into non-leafing pigments. This possibility must be taken into account when drawing up the formula of paints. If necessary special leafing stabilized pigments should be used

  Non-leafing pigments

  Non-leafing pigments are created either by the addition of strongly polar substances or wetting agents to leafing pigments or by the use of special lubricants (e.g. oleic acid) directly in the milling process.

  Non-leafing pigments are completely wetted and thus spread evenly throughout the entire paint film.


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