Synthesis And Properties of Solvent-free Water-Polyurethane For Synthetic Leather Adhesive

One- pot reaction was used in the preparation of a series of solvent- free waterborne polyurethane. The influence of soft segment,the molecular weight of soft segment and hydrophilic chain extender to viscosity,the average size of emulsoid particle and stability was compared. The solvent- free waterborne polyurethane were applied on synthetic leather adhesive coating. The peel strength,the anti- water penetration force and the anti- plasticizer penetration force and the anti- alkali penetration force were studied,the results showed that the overall performance of solvent- free waterborne polyurethane with PBA- 2000 as the soft segment and DMBA as hydrophilic radical was best,The peel strength was 21. 3 N·25 mm- 1,the anti- water penetration force was 87%,the anti- plasticizer penetration force was 69%,the anti- alkali penetration force was 78%.