FIELD: chemistry.
SUBSTANCE: invention relates to compositions, containing an active substance. Described is a composition for the active substance delivery, which contains: a) at least, one block-copolymer, containing, at least, one poly(2-oxazoline) block A, consisting of repeating units of formula 
where RA stands for a hydrocarbon group, which can be optionally substituted with -OH, -SH, -COOH, -NR'2, -COOR', -CONR', -CHO, where R' stands for H or C1-3 alkyl, and RA is selected in such a way that a repeating link of formula (I) is hydrophilic; and at least one poly(2-oxazoline) block B, consisting of repeating units of formula (II), where RB stands for a hydrocarbon group, which can be optionally substituted with halogen, -OH, -SH, -COOH, -NR''2, -COOR'', -CONR'', -CHO, where R'' stands for H, alkyl or alkenyl, and RB is selected in such a way that a repeating link of formula 
is more hydrophobic than the repeating link of formula (I); and (b) one or more active substances. Also described is application of a copolymer for solubilisation of the active substance in water or a water solution.
EFFECT: described copolymers serve as a universal medication delivery system with high loading.
12 cl, 6 dwg
