ELASTOMERIC COMPOSITION BASED ON COPOLYMER OF TETRAFLUOROETHYLENE AND PERFLUOROALKYL VINYL ESTERS Russian patent published in 2016 - IPC C08L27/18 

FIELD: chemistry.

SUBSTANCE: invention relates to production of rubber mixtures based on perfluorinated compounds, such compositions are intended for use as sealing materials in chemical, oil processing industry and microelectronics. Described is an elastomeric composition for sealing materials based on ternary or quaternary copolymer of tetrafluoroethylene and perfluoroalkyl vinyl esters, containing a cyano group, including as a vulcanising agent perfluorodiimidoylamidine and additive of polytetrafluoroethylene, characterised by that, additive used is ultrafine powder of radiation modified polytetrafluoroethylene with number-average particle diameter 1-15 mcm at following component ratio, pts.wt: copolymer 100, vulcanising agent 1-4, ultrafine polytetrafluoroethylene powder 1-10.

EFFECT: disclosed is a composition, vulcanisates of which even in unfilled state have high stress at 100 % tension and high-temperature of final decomposition.

1 cl, 2 tbl, 7 ex