1results about How to "Good quick drying" patented technology

This invention discloses a fast-drying waterborne polyurethane resin, its preparation method, and its application. By weight, it comprises the following components: 30-40 parts of self-made polyester polyol, 30-50 parts of polyether polyol, 2-5 parts of chain extender, 1-3 parts of hydrophilic monomer, 1-3 parts of trimethylolpropane, 40-60 parts of isocyanate, 1.1-1.5 parts of neutralizer, and 50-80 parts of solvent. This fast-drying waterborne polyurethane resin utilizes self-made branched polyester and polyether to construct flexible segments that combine rigidity and flexibility. Low hydrophilic monomer content enables self-emulsification and ensures water resistance. Trimethylolpropane and self-made polyester polyol form a double crosslinking network with built-in branching points. Isocyanate compounding balances hardness and pot life. The high R-value design allows residual NCO to naturally generate urea bonds during emulsification, compensating for the emulsification difficulties caused by low hydrophilicity. Ultimately, it achieves a balance between fast drying and high water resistance without the addition of external drying agents or amine-based chain extension. It combines fast drying, high water resistance, and excellent mechanical properties. The process is simple and low-cost, making it highly valuable for industrial promotion.