▎ 摘　　要

NOVELTY - A polysulfide sealing gum comprises a base paste and a vulcanizing paste. The base paste comprises liquid polysulfide rubber, graphene oxide, tackifier, plasticizer and adjuvant. The graphene oxide is carbon material, which does not display features of graphite and/or graphite oxide in X-ray diffraction measurement. The tackifier is epoxy resin. The plasticizer is dibutyl phthalate, butyl benzyl phthalate or paraffin chloride. The adjuvant is gas white carbon black, calcium stearate and mixture. The vulcanizing paste comprises vulcanizing agent, plasticizer and vulcanizing promoter. USE - Polysulfide sealing gum for bonding sealing parts of airplane, high speed train and car. ADVANTAGE - The polysulfide sealing gum has high intensity, better tensile strength, better stability and better reproducibility. DETAILED DESCRIPTION - A polysulfide sealing gum comprises a base paste and a vulcanizing paste in a weight ratio of 100:6-100:15.The base paste comprises (in %) liquid polysulfide rubber (30-80), graphene oxide (5-60), tackifier (0.5-10), plasticizer (5-20) and adjuvant (0-5). The liquid polysulfide rubber is liquid polysulfide rubbers having average molecular weight of 1000-7000 and/or mixture. The graphene oxide is carbon material, which does not display features of graphite and/or graphite oxide in X-ray diffraction measurement. The tackifier is epoxy resin. The plasticizer is dibutyl phthalate, butyl benzyl phthalate or paraffin chloride. The adjuvant is gas white carbon black, calcium stearate and mixture. The vulcanizing paste comprises vulcanizing agent (25-70), plasticizer (25-70) and vulcanizing promoter (0.5-5). The vulcanizing agent is manganese dioxide, lead dioxide, calcium peroxide or zinc peroxide. The promoter is diphenyl guanidine.