Oxygen blocking. Flame retardant silicone to use flame retardant vulcanizing agent is to block oxygen, silica belongs to the inorganic non-combustible crystals, so commonly used as epoxy, rubber and PP and other organic polymers of flame retardant filler, vulcanizing agent PDM, chemical name for N, N'-m-phenylene bismaleimide. It is a multifunctional rubber additive, which can be used as vulcanizing agent in rubber processing.
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