CHITOSAN PRODUCT, METHOD FOR ITS PREPARING (VARIANTS) Russian patent published in 2007 - IPC C08B37/08 C08J3/03 C08L5/08 B01J13/02 B01J13/14 

FIELD: derivatives of chitosan.

SUBSTANCE: invention relates to preparing biologically active chitosan substances and their derivatives. Invention describes a modified chitosan substance showing pH-neutral reaction and plastic structure of chitosan particles as fractal chitosan particles of size of nanofractals from 1 nm, not less, and to 5000 nm, not above, or as cross-linked net-shaped polymer having multiple cavities of size from 1 nm, not less, to 50 nm, not above. Invention describes methods for their preparing. Invention provides high transdermal penetration of chitosan substance and enhanced capacity for administration of medicinal or biologically active substances into chitosan substance. Invention can be used in manufacturing cosmetic, curative-cosmetic, pharmacological preparations, biologically active food supplements and foodstuffs.

EFFECT: improved and valuable properties of chitosan substances.

14 cl, 4 tbl, 7 dwg, 9 ex