Patent ID: 7067153

Claim:
A process for making hydrophobicized powders of micro- and/or nanocapsules comprising: (a) providing an aqueous polymer solution containing at least one active ingredient and at least one hydrophilic polymer; (b) providing an oil component heated to a temperature above a gel point of the aqueous polymer solution; (c) dispersing (a) in (b) in the presence of a water-in-oil emulsifier to form a dispersion; (d) cooling the dispersion while mixing to a temperature below the gel point of the aqueous polymer solution to form micro- and/or nanocapsules containing the active ingredient encapsulated therein; (e) harvesting the micro- and/or nanocapsules from the dispersion to recover micro- and/or nanocapsules coated with oil; and (f) contacting the micro- andlor nanocapsules coated with oil with an oil-absorbing auxiliary ingredient, whereby, micro- and/or nanocapsules with a protective, hydrophobic coating comprising the oil-absorbing auxiliary ingredient is formed.