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Epoxy appear floating color is mainly what causes it? What kind of measures should we take to resolve?

After curing epoxy floor paint in a film, because the pigments used, there will be separation, and performance of its main pigment (such as particle size, crystal, molecular polarity, surface charge, etc.). After the epoxy floor paint construction, color separation are generally divided into two kinds of vertical separation and horizontal separation. Flooding called vertical separation, horizontal separation is generally referred floating color. If the component epoxy floor coating does not change, resulting in the replacement of floating color hardener, this is mainly a problem of the pigment molecule polarity, because inorganic pigments are divided into polar and non-polar, while the curing agent The diluent is also divided into a polar solvent and a non-polar solvent. If the replacement polar diluent curing agent and pigments same polarity, both because of the poor compatibility in the coating drying process some uneven pigment component prematurely separated from the coating resulting in floating color .

When the molecular polarity component epoxy paint pigments and certain curing agent thinner molecular polarity is reversed, no floating color phenomenon. Generated when the floating color hardener replacement can reduce by adjusting dispersant polar, or adding an appropriate amount of a silane coupling agent in floor paint coating composition to reduce the polarity, eliminating the floating color.

These are the reasons for the emergence of floating color phenomenon Epoxy and solutions, we hope to avoid such a problem at the time of construction.环氧地坪出现浮色主要是什么原因导致的?我们应该采取什么样的措施来解决?

环氧地坪涂料在固化成膜以后,由于颜料的使用,会出现分离现象,其主要与颜料的性能(如粒径、晶型、分子极性、表面电荷等)有关。环氧地坪涂料施工后,颜色的分离一般分为垂直分离和水平分离两种。垂直分离称为发花,水平分离一般称为浮色。若环氧地坪涂料的组分不发生改变,更换固化剂后产生浮色,这种情况主要是颜料的分子极性问题,因为无机颜料分为极性和非极性的,同时固化剂中的稀释剂也分为极性溶剂和非极性溶剂。如果更换的固化剂中稀释剂的极性和颜料的极性相同,则两者因相容性差,在涂膜干燥过程中某些颜料组分过早地从涂料中不均匀分离而导致浮色。

当环氧地坪涂料组分中的颜料的分子极性和某种固化剂中稀释剂的分子极性相反时,不会产生浮色现象。更换固化剂后产生浮色时可通过调整分散剂降低极性,或在地坪涂料组分中加入适量的硅烷偶联剂来降低涂料的极性,消除浮色。

以上就是关于环氧地坪出现浮色现象的原因以及解决方法,希望大家在施工的时候可以避免出现这样的问题。

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