Preparation and Properties of RTV-1 Silicone Waterproof Emulsion
One-component room temperature vulcanized(RTV-1)silicone waterproof emulsion was prepared by ɑ,ω-di-hydroxy polydimethylsiloxane,MQ silicone resin,methyl triethoxysilane(MTES),polyoxyethylene lauryl ether-3,and sodium dodecyl sulfate as the main raw materials by mechanical emulsification,and it was used for waterproofing of cement-based materi-als.The effects of viscosity of polymer,content of MQ silicone resin,MTES and emulsifier on the performance of silicone water-proof emulsifier were studied.The results indicate that when the viscosity of ɑ,ω-dihydroxy polydimethylsiloxane is 20 000 mPa·s,the mass fraction of MQ silicone resin is 6％,MTES is 7％,and the mass fraction of compound emulsifier is 10％,the obtained silicone waterproof emulsion exhibits optimal performance.The water absorption ratio of the cement-based material treated with this emulsion is 6.32％,and no stratification occurs after12 months of storage.
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