THERMAL-STABILITY AND COMBUSTIBILITY OF BUTYL AND HALOGENATED BUTYL RUBBERS

The effects of flame retardants such as hydrated aluminium oxide, anti mony trioxide and chloroparaffin on the thermal properties and flammab ility of sulphur vulcanizates of butyl and halogenated butyl elastomer s were studied. The thermoanalytical curves of the elastomers were int erpreted. Greater tendencies to thermal degradation were observed for halogenated butyl elastomers than for the original butyl rubber elasto mer. This was confirmed by elastomer combustibility studies. The use o f these flame retardants allowed the formation of self-extinguishing v ulcanizates of the investigated elastomers.