In general, fillers, especially hydrophilic fillers, do not flow well, but by treating the surface with alkoxysilane, the surface can be made hydrophobic, preventing agglomeration and improving flowability.
As for inorganic fillers, silica, alumina, iron, aluminum, and other materials have good compatibility with silane, which can prevent agglomeration, improve flowability, and improve dispersibility when added to resins and solvents.

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