Dispersing emulsion of thermoplastic elastomer and process for preparing the same

The present invention relates to a dispersing emulsion of a thermoplastic elastomer, a process for preparing the same, and an asphalt modifier imparting preferable properties to asphalt. In particular, the present invention relates to a dispersing emulsion of a thermoplastic elastomer having storage stability and mechanical stability of the dispersing emulsion improved by using a specific nonionic emulsifier as an emulsifier for emulsification and dispersion, the other emulsifiers used as an optional component and a thickener, as well as a process for preparing the same, and an asphalt modifier comprising the water-based dispersing solution. There is provided a dispersing emulsion excellent in storage stability and mechanical stability, particularly an asphalt modifier of an water based dispersing emulsion, which can be mixed with a hot asphalt or an asphalt emulsion, and can improve rutting resistance, toughness, and flexibility at a low temperature without losing workability. There is provided a dispersing emulsion of a thermoplastic elastomer, which is emulsified and dispersed in the presence of at least one nonionic emulsifier selected from the group consisting of a styrenated phenol poly(alkylene oxide), a poly(alkylene polyamine) poly(alkylene oxide), polyalcohol fatty acid esters, polyalcohol fatty acid esters poly(alkylene oxide), and a benzylated phenol poly(alkylene oxide).