ELASTOMER COMPOSITION OF SILICONE CUREABLE WITH PEROXIDE AND PROCESS TO REDUCE THE AMOUNT OF SMOKE RELEASED DURING THE COMBUSTION OF ELASTOMERS PREPARED FROM HEALING COMPOSITES

摘要

Both the flammability and the amount of smoke generated during combustion of cured silicone elastomers prepared from a silica-reinforced gum-type polydiorgano-siloxane, an aromatic peroxide or peroxyester and a platinum-group metal or a compound thereof as the flame retarding agent are substantially reduced when the composition contains at least 40 parts by weight of hydrated alumina, at least one magnesium compound, or combinations of these additives. Finely divided quartz can comprise a portion of the additive so long as the total concentration of additive is at least 40 parts by weight and the combined weights of the hydrated alumina and magnesium compound constitutes at least 10 parts by weight per 100 parts of silica-reinforced polydiorganosiloxane.