Low-temperature-resistant tackifying and toughening asphalt modifier preparation method

The invention discloses a low-temperature-resistant tackifying and toughening asphalt modifier preparation method, which comprises: preparing a fluorosilicone acrylic acid copolymerization emulsion; preparing an ethylene-vinyl acetate (EVA) emulsion; preparing a styrene-butadiene-styrene thermoplastic elastomer water latex; adding the styrene-butadiene-styrene thermoplastic elastomer water latex,a dispersant, the ethylene-vinyl acetate (EVA) emulsion and a stabilizer to the fluorosilicone acrylic acid copolymerization emulsion, and compounding; adding the low-temperature-resistant tackifyingand toughening asphalt modifier to an emulsified asphalt soap liquid; mixing the hot asphalt and an odorless sulfur-containing cross-linking agent according to a certain mass ratio; and adding the obtained mixture to an emulsifier to finally obtain the high-viscosity and high-toughness modifier. According to the present invention, more than three polymer emulsions are compounded under the actionsof the stabilizer and the d