Sulfur-free aldehyde-free rubber plug and preparation method thereof

The invention discloses a sulfur-free aldehyde-free rubber plug and a preparation method thereof. With halogenated butyl rubber resin, nitrile rubber resin, zinc oxide, lactic acid, phthalic anhydride, bisphenol A epoxy resin, an amino silane coupling agent and a filling material as raw materials, the rubber plug is prepared through the steps of secondary mixing, sulfidizing and the like. All components of a vulcanization system composed of zinc oxide, lactic acid, phthalic anhydride and bisphenol A epoxy resin not only have no obvious biotoxicity, but also do not generate poisonous and harmful volatile matters or residues similar to sulfur, aldehyde and the like in sulfur-free vulcanization reaction, so that the prepared rubber plug does not contain sulfur and aldehyde poisonous and harmful residues; the rubber plug internally contains a bisphenol A epoxy resin crosslinking body having a chemical bonding effect on the filling material, so that the structure of the rubber plug can be improved, and the durability of the rubber plug is improved.