| 摘要 |
<p>A particulate composition comprises particles having a substantially anhydrous core comprising a matrix polymer containing active ingredient, a layer of hydrophobic oil around the core and a shell of polymer around the oil layer, wherein the solid matrix polymer is sufficiently hydrophobic that it will partition preferentially into the oil rather than into water. The composition can be a powder or a stable liquid dispersion. The active ingredient is preferably a detergent enzyme and the composition can therefore be a stable liquid laundry detergent. The composition can be made by providing an aqueous solution of encapsulating polymer, providing a substantially anhydrous dispersion in oil of particles of a matrix polymer containing active ingredient, dispersing this dispersion into the aqueous solution and causing a solid polymer shell to form around the droplets of the matrix particles.</p> |
