ELASTOMERIC COMPOSITION BASED ON COPOLYMER OF TETRAFLUOROETHYLENE AND PERFLUOROALKYL VINYL ESTERS Russian patent published in 2013 - IPC C08L27/18 C08F214/26 

FIELD: chemistry.

SUBSTANCE: elastomeric composition is based on a ternary or quaternary copolymer of tetrafluoroethylene and perfluoroalkyl vinyl esters which contain a cyano group, which contains perfluorodiimidoyl amidine as a vulcanising agent. The composition additionally contains 0.5-5.0 pts.wt oxides of group I, II, III, IV, V, VI, VIII metals or mixtures thereof. Components of the composition are in the following ratio: copolymer 100 pts.wt; vulcanising agent 1-4 pts.wt; metal oxide 0.5-5 pts.wt.

EFFECT: obtaining an elastomeric composition with shorter optimum time for the vulcanisation process, higher maximum torque during vulcanisation, the vulcanisates have good physical and mechanical properties, resistance to nitric acid, heat resistance after ageing for 70 hours, and can be used to obtain colour compositions without using expensive dyes.

9 cl, 2 tbl, 17 ex