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How can silica be used as a matting agent for paints & coatings?
Silicas has a relatively high efficiency in terms of matting efficiency.
There are two groups which differ in terms of their production process: precipitated with relatively soft morphology and silica-gel, which have a harder morphology.
Moreover, the silica particles can be surface modified to form silica treated products.
Modified silica possesses a different physical and chemical properties and in this way solving certain matting adding challenges in some paints systems, for examples viscosity increase, sediments settlings, etc.
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