Aqueous dispersion of hydrophobic particles and films produced thereby

摘要

An aqueous dispersion applied to a substrate to form a continuous hydrophobic film thereby providing a coated surface that is water resistant. The dispersion comprises: a) a particulate solid material having a hydrophobic outer surface, wherein the particulate solid material is selected from calcium carbonate, kaolin and pyrophyllite; b) up to about 30% by volume of a low boiling organic liquid sufficient to enable the particulate solid material to form a dispersion in water and to retain the hydrophobic outer surface upon drying; and c) water.