LINEAR STATISTICAL TETRAFLUOROETHYLENE TERPOLYMER WITH FUNCTIONAL PERFLUORINATED CO-MONOMERS AND METHOD FOR ITS PREPARING Russian patent published in 2006 - IPC C08F214/26 

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to a linear statistical tetrafluoroethylene terpolymer with functional perfluorinated co-monomers of the general structural formula: wherein M means hydrogen or alkaline metal ion; a = 5-19.5 mole%; b = 80-91 mole%; c = 0.5-5 mole%; . Terpolymer shoes endothermic peak in the temperature interval 70-75°C on the crystalline melting curve measured by scanning differential calorimeter. Terpolymer has mean-weighted molecular mass (2-8) x 10⁵ Da and the ratio of mean-weighted molecular mass to average molecular mass = 1.2-1.35. Also, invention relates to a method for preparing terpolymer. Invention provides preparing terpolymer that is able after hydrolysis to form concentrated solutions (above 5 wt.-%) in available solvents and under mild conditions, and to enhance the strength and to reduce electric resistance of membranes made of the claimed terpolymer.

EFFECT: improved preparing method, valuable properties of terpolymer.

4 cl, 2 tbl, 3 dwg, 37 ex