The results showed that the stable high solid content APU emulsion was conveniently obtained with polyurethane prepolymers when mass fraction of carboxyl was 0.8%~1.3%, NCO/OH(mole ratio) was 1.5~1.9 and mass fraction of cosolvent acetone was 5%.

• 结果表明:羧基质量分数为0.；8%25~1