METHOD OF PRODUCING COPOLYMERS OF POLYGUANIDINE SALTS AND COPOLYMERS OF POLYGUANIDINE SALTS Russian patent published in 2009 - IPC C07C279/02 C08G73/00 

FIELD: chemistry.

SUBSTANCE: method of producing copolymers of polyguanidine salts involves treating polyguanidine chloride with a metal compound in an alcoholic solvent, separating the formed metal chloride precipitate through filtration, mixing the filtrate and acid with formation of a copolymer of polyguanidine salts, and subsequent drying the desired product. The polyguanidine chlorides used have general formula , where R is alkylene with straight and branched structure with C₄-C₁₂, oxaalkykene[-CH₂-]_P O[-CH₂-]_q, dioxaalkylene [-CH₂-]_P O[-CH₂-]_q O[-CH₂-]_r, trioxaalkylene [-CH₂-]_pO[-CH₂-]_q O[-CH₂-]_r O[-CH₂-]_s, tetraoxaspiroalkylene , n ranges from 2 to 1000; p, q, r, s assume values from 2 to 12, the metal compound used is potassium hydroxide, the alcoholic solvent used is a mixture of ethanol and rectificate with isopropanol in ratio (100-30):(0-70), where the said alcoholic solution of potassium hydroxide is mixed with dry crushed polyguanidine chloride, mixture of organic or mineral (except hydrofluoric) mono- or polybasic acid or mixture acid with filtrate is done after vacuum distillation of alcohol from the filtrate at pressure ranging from 0.1 to 0.2 atm and temperature from 50 to 60°C. Copolymers of polyguanidine salts of general formula: , where R is alkylene with straight or branched structure with C₄-C₁₂, oxaalkylene [-CH₂-]_P O[-CH₂-]_q, dioxaalkylene [-CH₂-]_p O[-CH₂-]_q O[-CH₂-]_r, trioxaalkylene [-CH₂-]_P O[-CH₂-]_q O[-CH₂-]_r O[-CH₂-]_s, tetraoxaspiroalkylene, where (n-x): x=19:1-1:19; n=2-100; p, q, r, s assume values from 2 to 12, A is an anion of organic or mineral (except hydrofluoric) mono- and polybasic acid or a mixture of acids.

EFFECT: improvement of method.

3 cl, 4 ex, 4 tbl