Enhancement of the heat resistance of vulcanized siloxane rubbers by a montmorillonite-type organoclay

Effect of combinations of antimony trioxide with nontoxic flame retardants on the flame resistance and properties of vulcanized rubber based on general-purpose rubbers

“…Aluminum hydroxide, barium borate, and microquartz met the requirements of GOST (State Standard) 11841-66, TU (Technical Specifi cation) 2146-002-61914412-2011, and GOST 9077-82, respectively. Cloisite 15A organoclay is natural layered montmorillonite modifi ed with dimethyldialkylammonium chloride, produced by Southern Clay Products (the United States) [8].…”

“…According to [8,9], the fl ame resistance of rubber sample nos. 2, 4, and 6, containing Cloisite 15A, is probably associated with penetration (intercalation) of rubber macromolecules into the interlayer space of the layered silicate constituent of Cloisite 15A.…”

“…The problem of replacement of antimony trioxide by nontoxic flame retardants can also be solved by introducing organoclays into rubbers. It has been found [8][9][10] that organoclays based on layered silicates (montmorillonites) enhance the heat resistance of vulcanized rubbers, which, in turn [4], should lead to the enhancement of their fl ame resistance. In this study, we examined the possibility of partial replacement of antimony trioxide by combination of aluminum hydroxide with barium borate, by Cloisite 15A organoclay, and by microquartz in vulcanized rubber based on generalpurpose rubbers (isoprene and butadiene) with sulfur vulcanizing system, used for fabrication of fl ame-resistant molded rubber items for mining industry.…”