Process for producing liquid-loaded powders

Details Process for producing liquid-loaded powders Process for producing liquid-loaded powders

C - Chemistry, Metallurgy

08

J

167/159, 18/17,

C08J 9/28 (2006.01) A01N 25/26 (2006.01) A61K 9/14 (2006.01) C08L 1/08 (2006.01) A61K 7/42 (1990.01)

Patent

CA 2031095

ABSTRACT The specification describes a process for producing liquid-loaded powders which are capable of releasing their liquid load when subjected to shearing forces. A cellulosic polymer and a liquid load are dissolved in a polar solvent to form a solution. The solvent is then dispersively evaporated from the solution to form a liquid-loaded powder. Dispersive evaporation of the solvent in a spray drying tower is described. Cellulosic polymers exemplified in the specification include cellulose triacetate, an ethyl cellulose and a cellulose propionate. Solvents exemplified include methylene chloride, ethyl acetate and acetone. Uses of the liquid-loaded powder described include a carrier for fragrances used in toilet soap formulation, a sunscreen formulation in powder form, an insect repellent in powder form, a baby oil and a moisturizer in powder form.

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