| 摘要 |
The present invention relates to a method for preparing a biomass-based polymer emulsion. The method comprises: dissolving cardanol in a solvent a , adding a sulfonating agent and strong alkali, reacting and cooling, adjusting the pH value and reacting again, cooling overnight, filtering, dissolving a solid washed by the solvent a in an anhydrous solvent b, adding a modifier and triethylamine., and carrying out the polymerization reaction to obtain a cardanol-based emulsifier; after modifying castor oil by using maleic anhydride, adding isocyanate, a catalyst and a chain extender for polymerizing to obtain a castor oil-based polyurethane prepolymer; and adding an acrylate monomer and water into the castor oil-based polyurethane prepolymer and the cardanol-based emulsifier, swelling, rising the temperature to 70-90°C for reaction, and adding an initiator to initiate the polymerization. By using the present invention, acrylate is copolymerized in a system with a cardanol-based polymerizable emulsifier as a medium and double bonds on a castor oil derivative are used for graft copolymerization, so that a prepared emulsion is high in compatibility, good in stability, good in water tolerance, good in chemical tolerance and good in weather tolerance, has the advantages of incombustibility, no toxicity, no environmental pollution and the like, and is wide in use. |
