UF Resin with lower content of free formaldehyde could be obtained by adopting the technipues of decreasing formaldehyde/urea molar ratio,charging urea in three times and without dewatering.

• 本文采用降低甲醛和尿素摩尔比，分批加入尿素和不脱水工艺合成游离甲醛含量低的脲醛树脂。