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乳胶漆中添加高岭土的优点

Release date:2018-05-09  source:粉体网  Browse times:584
       乳胶漆中添加经精细加工的高岭土所获得的涂料和涂膜的性能会使我们觉得高岭土不仅仅是一种普通填料,它可以成为功能性填料来提高涂料的品质。这些好处包括:

由于其六边形晶体结构折射率高,大大提高涂膜的对比率(干遮盖力)并提供优良的色延展性。

高岭土的扁平性质可在涂料流动性与流平性之间提供良好的平衡。扁平粒子也倾向于漆膜表面平行排列,可有效阻止水分的渗透,使涂膜耐洗刷性和抗污染性得到改善,对发黏的漆膜来说,扁平粒子可改善涂料的抗压黏性。

高岭土是亲水性的,故易于分散,颗粒容重较小,悬浮性能良好。

具有较窄的胶态粒子分布范围,倾向于使涂料黏度不发生变化,并能提供满足要求的流变性和触变性(高剪高流和低剪低流),因而涂膜比较丰满,并能改善颜料的抗浮色和发花的弊端。

化学惰性强,晶体光轴角小,晶形排列有序度高,水性高岭土又保留了结晶水,结晶水的层间干扰效应,这些都将显著地增强涂层对紫外线屏蔽能力。

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