AQUEOUS DISPERSIONS Russian patent published in 2002 - IPC

FIELD: biotechnological methods. SUBSTANCE: invention relates to compositions containing aqueous dispersion, which can be used in biotechnology to dehydrate and purify wastes and which consists of (i) first cationic water-soluble or water-swelling polymer having at least one recurrent motif of formula I: (I), in which R₁ denotes hydrogen or methyl, A oxygen or imino, B alkylene or branched alkylene or oxyalkylene group having 1 to 5 carbon atoms, R₂ is methyl, ethyl, or propyl group, R₃ alkyl or substituted alkyl group R₄ with 1 to 10 carbon atoms, or aryl or substituted aryl group with 6 to 10 carbon atoms, X denotes counter ion, and R₂, R₃ and R₄ contain in sum at least 4 carbon atoms; (ii) at least one second water-soluble polymer other than the first one; (iii) cosmotropic salt, and (iv) chaotropic or anionic organic salt. Invention also provides other embodiments of aqueous dispersion. EFFECT: lowered bulk viscosity, increased content of active solids, and minimized amount of diluent. 7 cl, 15 tbl, 293 ex