METHOD OF PRODUCING POLYGUANIDINE Russian patent published in 2015 - IPC C07C279/00 C07C279/02 C08G73/00 C08G73/02 A61L101/46 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing polyguanidine, having improved biocidal properties. Described is a method of producing polyguanidine via polycondensation of a guanidine salt with a diamine in the presence of an organic acid or a mixture of organic acids and in the presence of an inorganic salt of a transition metal or aluminium, or a mixture thereof with step-by-step heating as follows: gradually raising temperature to 120…130°C and maintaining said temperature for a hour, raising temperature to 150…160°C and maintaining said temperature for 3.5…4 hours and raising temperature to 170…180°C and maintaining said temperature for 1…1.5 hours.

EFFECT: obtained polyguanidines are characterised by low content of monomer residue and high biological activity, owing to which they can be used to purify drinking and waste water and to produce low-toxic, environmentally safe disinfecting, antiseptic and cosmetic agents.

17 cl, 2 tbl, 20 ex