Adding the PQ additive with 2 times, to the addition condensation reaction of urea with formaldehyde, can reduce the content of free CH 2O and increase stability of UF resin adhesive .

• 在尿素与甲醛加成-缩合反应中,分2次加入自制PQ复合添加剂,可明显降低游离甲醛的含量,提高脲醛树脂胶粘剂(UF胶)的稳定性。