CATIONIC POLYMERS AS THICKENERS OF AQUEOUS AND ALCOHOL COMPOSITIONS Russian patent published in 2013 - IPC C08F220/04 C08F226/02 C08F226/06 C08F4/38 A61K8/04 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of producing polymers by radical precipitation polymerisation: a) 99.99-10 wt % of at least one α,β-ethylenically unsaturated compound with at least one cationogenic and/or cationic group in the molecule, wherein a) is selected from vinyl imidazoles of general formula (III) in which residues R¹-R³ denote hydrogen, an alkyl with 1-4 carbon atoms or a phenyl, b) from 0 to less than 25 wt % of at least one monoethylenically unsaturated compound, different from component a) and having amide groups, which is selected from a group comprising amide group-containing α,β-ethylenically unsaturated compounds of general formula (IV): in which R² denotes a group of formula CH₂=CH-, and R¹ and R³ together with an amide group with which they are bonded form a lactam with 5 ring atoms, c) 0.01-5 wt % of a cross-linking agent, d) 0-15 wt % of at least one monoethylenically unsaturated compound selected from alkyl(meth)acrylates with 12-30 carbon atoms in the alkyl, e) 0-30 wt % methyl methacrylate, under the condition that the total amount of components a) - e) is equal to 100 wt %, characterised by that realisation thereof involves use of at least two different water-insoluble initiators A and B, which are selected such that the breakdown temperature of each is at least 70°C and said temperature values differ from each other by at least 10°C. Also described is use of at least one polymer obtained using said method to modify rheology of aqueous, alcohol or water-alcohol compositions. Described also is a cosmetic or pharmaceutical agent which contains at least one polymer obtained using said method.

EFFECT: obtaining polymers having optimum consumer properties and a thickening effect at the same time.

12 cl, 1 tbl, 16 ex