Anion polyurethane and amino silicon oil composite water dispersion, preparation and applications

The invention discloses an anionic polyurethane and amino silicone oil composite aqueous dispersion and a preparation method and an application thereof. High molecular weight polyether glycol and anionic diol chain extender react with diisocyanate to form anionic polyurethane after end capping. The anionic polyurethane and low molecular weight amino terminated silicone oil are blended and added with a salt forming agent for tertiary amine and biacrylic ester to conduct self-emulsification at the room temperature to form amino silicone oil/polyurethane blended anionic aqueous dispersion microemulsion. The anionic aqueous dispersion microemulsion is heated to complete a chain extension of amino silicone oil on opposite terminals of the biacrylic ester, and thus the preparation of high molecular weight amino silicone oil/polyurethane composite aqueous dispersion is realized. The high molecular weight amino silicone oil/polyurethane composite aqueous dispersion has characteristics of small grain size and good sta