| abstract |
The invention discloses a wear-resistant waterborne polyurethane extinction coating and a preparation method thereof. The preparation method comprises the steps of dehydrating fatty polyol, hydroxyl-terminated polydimethylsiloxane and dimethylolpropionic acid, and adding isophorone diisocyanate and an organic tin catalyst for reaction; then adding trimethylolpropane for crosslinking; neutralizing with a neutralizing agent to form salt, and adding water under high-speed stirring to form stable aqueous polyurethane emulsion; and finally, adding an amine or hydrazine chain extender with higher reaction activity and an amine silane coupling agent to completely react the residual isocyanate. The self-extinction type waterborne polyurethane prepared by the invention has the characteristic of high wear resistance, solves the problem of poor wear resistance of self-extinction resin, and is suitable for the surfaces of products such as high-grade sofa leather, automobile interior trim leather and the like. |