ELASTOMERIC COMPOSITION BASED ON BROMINE-CONTAINING TETRAFLUOROETHYLENE AND PERFLUOROALKYL VINYL ESTERS COPOLYMER Russian patent published in 2017 - IPC C08L27/16 C08L29/10 C08K3/22 C08K5/10 C08F8/18 

FIELD: rubber industry.

SUBSTANCE: invention relates to production of rubber mixtures based on ternary or quaternary bromine-containing copolymers of tetrafluoroethylene and perfluoroalkyl vinyl esters. Described is sealing materials elastomeric composition based on bromine-containing copolymer of tetrafluoroethylene and perfluoroalkyl vinyl esters, containing curing agent, organic peroxide, curing coagent triallyl isocyanurate and hydrogen halides scavenger, selected from group comprising zinc oxide and calcium hydroxide, which additionally comprises radiation-modified polytetrafluoroethylene with number-average particles size of 1–15 mqm at following ratios of components, pts.wt: copolymer 100, organic peroxide 2.0–3.5, triallyl isocyanurate 2.0–3.5, hydrogen halides scavenger 2.0–3.0, radiation-modified PTFE 2-20.

EFFECT: technical result: development of composition, which vulcanizates have reduced water absorption at 200 °C, while maintaining composite high strength properties.

1 cl, 2 tbl, 16 ex