| abstract |
The invention relates to the field of high polymer materials, and particularly relates to waterborne polyurethane and a preparation method and application thereof, wherein the waterborne polyurethane comprises the following components in parts by weight: 30-200 parts of a hydrophilic chain extender, 100-500 parts of polyol, 40-400 parts of polyisocyanate, 0.25-3.4 parts of a catalyst, 250-1000 parts of an organic solvent, 500-3000 parts of water and 10-100 parts of a neutralizer; wherein, the neutralizing agent is amino acid and derivatives thereof. The amino acid and the derivatives thereof are used as the neutralizing agent, and play a positive role in reducing or replacing the environmental problems caused by using hydrochloric acid, triethylamine, ammonia water and the like as the neutralizing agent. The amino acid has good biocompatibility, and further widens the application fields of the waterborne polyurethane, such as the fields of drug carriers, heart stents, cosmetics and the like. In addition, the performance of crystallization and the like carried by the amino acid endows the waterborne polyurethane with more excellent performance. |