Method for coating fine particulate expandable styrene polymers

摘要

Fine particulate expandable styrene polymers have coatings applied thereto by: (a) introducing the fine particulate expandable styrene polymers into a closed mixing vessel; (b) reducing the pressure in the mixing vessel below atmospheric; (c) preparing dispersions of the coating materials and heating the dispersions to about 30 DEG to 90 DEG C.; and (d) aspirating the heated dispersions of the coating materials into the mixing vessel while simultaneously mixing the dispersions with the particulate styrene polymers to form a coating thereon and drying the coated particles.