TETRAFLUOROETHYLENE-PERFLUOROBUTYLETHYLENE COPOLYMER Russian patent published in 2006 - IPC C08F214/26 

FIELD: organic chemistry, chemical technology, polymers.

SUBSTANCE: invention relates to a method for preparing copolymer of tetrafluoroethylene of dispersion type/type of finely divided powder comprising from 99.4 wt.-% to 99.98 wt.-% of tetrafluoroethylene links and from 0.02 wt.-% to 0.6 wt.-% of perfluorobutylethylene links. Method involves carrying out the dispersion copolymerization reaction of tetrafluoroethylene and perfluorobutylethylene. The copolymerization reaction is initiated by addition of potassium permanganate and its addition is ceased when the reaction has carried out by 80%, not above. The copolymerization reaction is carried out in the absence of enhancer of the medium ionic strength. Also, invention relates to tetrafluoroethylene copolymer. Invention provides preparing copolymer of tetrafluoroethylene and perfluorobutylethylene of dispersion type that shows small main size of particles and low standard specific mass value.

EFFECT: improved preparing method, valuable properties of copolymer.

22 cl, 6 ex