TERNARY BROMINE-CONTAINING COPOLYMERS BASED ON TETRAFLUOROETHYLENE FOR THERMO-AGGRESSIVE RESISTANT MATERIALS AND SYNTHESIS METHOD THEREOF Russian patent published in 2011 - IPC C08F14/16 C08F214/26 C08L27/18 C08F2/22 C08F4/40 C08J3/24 

FIELD: chemistry.

SUBSTANCE: invention describes ternary bromine-containing copolymers based on tetrafluoroethylene of general formula -[CF₂CF₂]_n-[CF₂CF(OR_F)]_m-[CF₂CF(CF₂O(CF₂)_kCF₂Br)]_P- where R_F=-CF₃; -CF₂CF₂CF₃; n=50.0-70.0 mol %; m=29.0-49.0 mol %; p = 0.3-2.5 mol %; k=1-3 for thermo-aggressive resistant materials. The invention also describes a method for synthesis of described ternary bromine-containing copolymers based on tetrafluoroethylene through copolymerisation of tetrafluoroethylene, perfluoroalkylvinyl ether and bromine-containing monomer, involving carrying out the copolymerisation process while periodically feeding charge material and constant pressure, and the bromine-containing comonomer used o-bromoperfluoroalkylated ethers of general formula CF₂=CFCF₂O(CF₂)_k CF₂ Br, where k=1-3.

EFFECT: obtaining copolymers based on tetrafluoroethylene with high output, vulcanisates having improved residual deformation properties after compression along with retention of good physical and mechanical properties.

5 cl, 12 ex, 3 tbl