FIELD: polymer materials.
SUBSTANCE: invention is directed to composition used in chemical and petroleum processing industries, where high thermosetting properties of rubber compound composition are required, based on terpolymer and quaternary copolymer of terafluoroethylene and perfluoroalkyl vinyl ethers including cyano group and represented by structural formulas III, IV, and V, which composition comprises as vulcanization agent perfluorodiimidoylamidins of specified formula in amount 1-4 wt parts per 100 wt parts copolymer. Technical task of present invention was to work out composition imparting bright color to vulkanizates based thereon and, along with high physicochemical characteristics, manifests elevated heat resistance in strained state and resistance to concentrated nitric acid. The task is solved by using, as vulcanization agent, above-mentioned perfluorodiimidoylamidin of specified formula.
EFFECT: improved physicochemical characteristics and heat and chemical resistance.
2 cl, 3 tbl, 12 ex
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