| abstract |
The invention discloses an aqueous polyurethane-polyvinyl acetate emulsion and a preparation method thereof, as well as an aqueous vacuum suction plastic and a preparation method thereof. The raw materials of the water-based polyurethane-polyvinyl acetate emulsion include (A) a diisocyanate-terminated prepolymer, (B) a component for dissolving and diluting the diisocyanate-terminated prepolymer, (C) a small molecular amine chain extender, (D) ) monoamine-based small molecule end capping agent, (E) vinyl acetate, (F) protective colloid, (G) free radical initiator, (H) water, the water-based polyurethane-vinyl acetate emulsion of the present invention has a low thermal activation temperature. (55-60℃), high initial strength, good heat resistance and other advantages, the water-based vacuum plastic prepared from it has excellent strength, heat resistance, low activation temperature and good surface effect. |