COATING ENSURING A CONTROLLED RELEASE OF ACTIVE INGRED IENTS OF BIOLOGICALLY ACTIVE COMPOSITIONS, PARTICULARL Y PHARMACEUTICAL COMPOSITIONS AND A PROCESS FOR THE PR EPARATION OF BIOLOGICALLY ACTIVE COMPOSITIONS ENSURING CONTROLLED RELEASE OF ACTIVE INGREDIENTS

摘要

ABSTRACT OF THE DISCLOSUREThe invention relates to a dispersion for use in the preparationof a composition for the controlled release of a biologically active com-ponent of the composition. The dispersion comprises a water-insolublecoating-forming polymer in solution in a water-immiscible organic solvent and,dispersed therein, from 2 to 30% of total volume of fine aqueous droplets ofdiameter less than 20 µ. The invention also relates to compositions com-prising a biologically active material contained in a coating formed from thedispersion.